attempt to fix ci

another fix for ci

fix build tagged images

.dockerignore

@@ -20,4 +20,5 @@ debug.test
 *.prof
 *.test
 remark42
-/backend/var/
+/backend/var/
+compose-private-backend.yml

.drone.yml

@@ -1,101 +0,0 @@
-workspace:
-  base: /go
-  path: src/github.com/umputun/remark
-
-pipeline:
-  
-  build:
-    image: golang:1.12-alpine
-    commands:
-      - sleep 5
-      - nslookup mongo
-      - nslookup mongo | grep Address | awk '{print $3}' > backend/.mongo
-      - cat backend/.mongo
-      - cd backend/app
-      - go build -v ./...
-
-  docker_master:
-    image: plugins/docker
-    repo: umputun/remark42
-    secrets: [ docker_username, docker_password]
-    build_args:
-      - DRONE=${DRONE}
-      - DRONE_TAG=${DRONE_TAG}
-      - DRONE_COMMIT=${DRONE_COMMIT}
-      - DRONE_BRANCH=${DRONE_BRANCH}
-    tags:
-      - ${DRONE_COMMIT_BRANCH/\//-}
-    when:
-      branch: [master, release/*]
-      event: push
-
-  docker_tag:
-    image: plugins/docker
-    repo: umputun/remark42
-    secrets: [ docker_username, docker_password ]
-    build_args:
-      - DRONE=${DRONE}
-      - DRONE_TAG=${DRONE_TAG}
-      - DRONE_COMMIT=${DRONE_COMMIT}
-    tags: 
-      - ${DRONE_TAG}
-      - latest
-    when:
-      event: tag
-
-  artifacts_tag:
-    image: plugins/docker
-    dockerfile: Dockerfile.artifacts
-    build_args:
-      - DRONE=${DRONE}
-      - DRONE_TAG=${DRONE_TAG}
-      - DRONE_COMMIT=${DRONE_COMMIT}
-      - GITHUB_TOKEN=${GITHUB_TOKEN}
-    when:
-      event: tag
-
-  docker_branch:
-    image: plugins/docker
-    repo: umputun/remark42
-    secrets: [ docker_username, docker_password ]
-    build_args:
-      - DRONE=${DRONE}
-      - DRONE_COMMIT=${DRONE_COMMIT}
-      - DRONE_BRANCH=${DRONE_BRANCH}
-    tags:
-      - ${DRONE_COMMIT_BRANCH/\//-}
-    when:
-      branch:
-        exclude: [master, release/*]
-        event: push
-
-  deploy:
-    image: appleboy/drone-ssh
-    host: remark42.com
-    username: umputun
-    port: 22
-    secrets: [ ssh_key ]
-    script:
-      - cd /srv/remark
-      - docker-compose pull
-      - docker-compose up -d
-    when:
-      branch: master
-      event: push
-
-  notify:
-    image: drillster/drone-email
-    host: smtp.mailgun.org
-    port: 25
-    username: email_username
-    password: email_password
-    from: drone@mg.umputun.com
-    recipients: [ umputun@gmail.com ]
-    secrets: [ email_username, email_password ]
-    when:
-      status: [ changed, failure ]
-
-services:
-  mongo:
-    image: mongo:3.6
-    command: [ --smallfiles ]

.editorconfig

@@ -0,0 +1,11 @@
+[*]
+indent_style = tab
+insert_final_newline = true
+
+[*.md]
+indent_style = space
+trim_trailing_whitespace = false
+
+[*.yml]
+indent_size = 2
+indent_style = space

.github/CODEOWNERS

@@ -0,0 +1,5 @@
+# These owners will be the default owners for everything in the repo.
+# Unless a later match takes precedence, @umputun will be requested for
+# review when someone opens a pull request.
+
+*       @umputun

.github/FUNDING.yml

@@ -0,0 +1,4 @@
+# These are supported funding model platforms
+
+github: [umputun]
+patreon: remark42

.github/workflows/ci-build.yml

@@ -0,0 +1,85 @@
+name: build
+
+on:
+  push:
+    branches:
+    tags:
+    paths:
+      - ".github/workflows/ci-build.yml"
+      - "backend/**"
+      - "frontend/**"
+      - ".dockerignore"
+      - "docker-init.sh"
+      - "Dockerfile"
+      - "!**.md"
+  pull_request:
+    paths:
+      - ".github/workflows/ci-build.yml"
+      - "backend/**"
+      - "frontend/**"
+      - ".dockerignore"
+      - "docker-init.sh"
+      - "Dockerfile"
+      - "!**.md"
+
+jobs:
+  build-images:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: available platforms
+        run: echo ${{ steps.buildx.outputs.platforms }}
+
+      - name: build and deploy master image to ghcr.io and dockerhub
+        if: ${{ github.ref == 'refs/heads/master' }}
+        env:
+          GITHUB_PACKAGE_TOKEN: ${{ secrets.PKG_TOKEN }}
+          DOCKER_HUB_TOKEN: ${{ secrets.DOCKER_HUB_TOKEN }}
+          USERNAME: ${{ github.actor }}
+          GITHUB_SHA: ${{ github.sha}}
+          GITHUB_REF: ${{ github.ref}}
+        run: |
+          ref="$(echo ${GITHUB_REF} | cut -d'/' -f3)"
+          echo GITHUB_REF - $ref
+          echo ${GITHUB_PACKAGE_TOKEN} | docker login ghcr.io -u ${USERNAME} --password-stdin
+          echo ${DOCKER_HUB_TOKEN} | docker login -u ${USERNAME} --password-stdin
+          docker buildx build --push \
+              --build-arg SKIP_BACKEND_TEST=true --build-arg SKIP_FRONTEND_TEST=true --build-arg CI=github \
+              --build-arg GITHUB_SHA=${GITHUB_SHA} --build-arg GIT_BRANCH=${ref} \
+              --platform linux/amd64,linux/arm/v7,linux/arm64 \
+              -t ghcr.io/${USERNAME}/remark42:${ref} -t ${USERNAME}/remark42:${ref} .
+
+      - name: deploy tagged (latest) to ghcr.io and dockerhub
+        if: ${{ startsWith(github.ref, 'refs/tags/') }}
+        env:
+          GITHUB_PACKAGE_TOKEN: ${{ secrets.PKG_TOKEN }}
+          DOCKER_HUB_TOKEN: ${{ secrets.DOCKER_HUB_TOKEN }}
+          USERNAME: ${{ github.actor }}
+          GITHUB_SHA: ${{ github.sha}}
+          GITHUB_REF: ${{ github.ref}}
+        run: |
+          ref="$(echo ${GITHUB_REF} | cut -d'/' -f3)"
+          echo "GITHUB_REF=$ref, GITHUB_SHA=${GITHUB_SHA}"
+          echo ${GITHUB_PACKAGE_TOKEN} | docker login ghcr.io -u ${USERNAME} --password-stdin
+          echo ${DOCKER_HUB_TOKEN} | docker login -u ${USERNAME} --password-stdin
+          docker buildx build --push \
+              --build-arg SKIP_BACKEND_TEST=true --build-arg SKIP_FRONTEND_TEST=true --build-arg CI=github \
+              --build-arg GITHUB_SHA=${GITHUB_SHA} --build-arg GIT_BRANCH=${ref} \
+              --platform linux/amd64,linux/arm/v7,linux/arm64 \
+              -t ghcr.io/umputun/remark42:${ref} -t ghcr.io/umputun/remark42:latest \
+              -t umputun/remark42:${ref} -t umputun/remark42:latest .
+
+      - name: remote deployment to remark42.com from master
+        if: ${{ github.ref == 'refs/heads/master' }}
+        env:
+          UPDATER_KEY: ${{ secrets.UPDATER_KEY }}
+        run: curl https://jess.umputun.com/update/remark42-core/${UPDATER_KEY}

.github/workflows/ci-frontend-size-limit.yml

@@ -0,0 +1,20 @@
+name: frontend
+
+on:
+  pull_request:
+    paths:
+      - ".github/workflows/ci-frontend-size-limit.yml"
+      - "frontend/**"
+      - "!**.md"
+
+jobs:
+  size:
+    runs-on: ubuntu-latest
+    env:
+      CI_JOB_NUMBER: 1
+    steps:
+      - uses: actions/checkout@v1
+      - uses: andresz1/size-limit-action@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          directory: frontend

.github/workflows/ci-frontend.yml

@@ -0,0 +1,107 @@
+name: frontend
+
+on:
+  push:
+    branches:
+    tags:
+    paths:
+      - ".github/workflows/ci-frontend.yml"
+      - "frontend/**"
+      - "!**.md"
+  pull_request:
+    paths:
+      - ".github/workflows/ci-frontend.yml"
+      - "frontend/**"
+      - "!**.md"
+
+jobs:
+  check-translations:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [14.15]
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+
+      - run: npm ci --loglevel warn
+        working-directory: ./frontend
+
+      - uses: actions/cache@v2
+        with:
+          path: ${{ github.workspace }}/frontend/node_modules/.cache
+          key: ${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+
+      - run: npm run check:translation
+        working-directory: ./frontend
+
+  check-typescript:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [14.15]
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+
+      - run: npm ci --loglevel warn
+        working-directory: ./frontend
+
+      - uses: actions/cache@v2
+        with:
+          path: ${{ github.workspace }}/frontend/node_modules/.cache
+          key: ${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+
+      - run: npm run check:types
+        working-directory: ./frontend
+
+  lint:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [14.15]
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+
+      - run: npm ci --loglevel warn
+        working-directory: ./frontend
+
+      - run: npx run-p lint
+        working-directory: ./frontend
+
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [14.15]
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+
+      - run: npm ci --loglevel warn
+        working-directory: ./frontend
+
+      - run: npm run test:coverage
+        working-directory: ./frontend
+
+      - name: submit coverage
+        run: node ${{ github.workspace }}/frontend/node_modules/.bin/codecov
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/ci-site.yml

@@ -0,0 +1,68 @@
+name: site
+
+on:
+  push:
+    branches:
+    tags:
+    paths:
+      - ".github/workflows/ci-site.yml"
+      - "site/**"
+  pull_request:
+    paths:
+      - ".github/workflows/ci-site.yml"
+      - "site/**"
+
+jobs:
+
+  build-site:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+
+      - name: set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: available platforms
+        run: echo ${{ steps.buildx.outputs.platforms }}
+
+      - name: build and deploy master image to ghcr.io and dockerhub
+        if: ${{ github.ref == 'refs/heads/master' }}
+        env:
+          GITHUB_PACKAGE_TOKEN: ${{ secrets.PKG_TOKEN }}
+          USERNAME: ${{ github.actor }}
+          GITHUB_SHA: ${{ github.sha}}
+          GITHUB_REF: ${{ github.ref}}
+        working-directory: ./site
+        run: |
+          ref="$(echo ${GITHUB_REF} | cut -d'/' -f3)"
+          echo GITHUB_REF - $ref
+          echo ${GITHUB_PACKAGE_TOKEN} | docker login ghcr.io -u ${USERNAME} --password-stdin
+          docker buildx build --push --no-cache --platform linux/amd64,linux/arm/v7,linux/arm64 \
+            -t ghcr.io/${USERNAME}/remark24-site:${ref} .
+
+      - name: deploy tagged (latest) to ghcr.io and dockerhub
+        if: ${{ startsWith(github.ref, 'refs/tags/') }}
+        env:
+          GITHUB_PACKAGE_TOKEN: ${{ secrets.PKG_TOKEN }}
+          USERNAME: ${{ github.actor }}
+          GITHUB_SHA: ${{ github.sha}}
+          GITHUB_REF: ${{ github.ref}}
+        working-directory: ./site
+        run: |
+          ref="$(echo ${GITHUB_REF} | cut -d'/' -f3)"
+          echo "GITHUB_REF=$ref, GITHUB_SHA=${GITHUB_SHA}"
+          echo ${GITHUB_PACKAGE_TOKEN} | docker login ghcr.io -u ${USERNAME} --password-stdin
+          docker buildx build --push --no-cache --platform linux/amd64,linux/arm/v7,linux/arm64 \
+            -t ghcr.io/${USERNAME}/remark24-site:${ref} -t ghcr.io/${USERNAME}/remark24-site:latest .
+
+      - name: remote site deployment from master
+        if: ${{ github.ref == 'refs/heads/master' }}
+        env:
+          UPDATER_KEY: ${{ secrets.UPDATER_KEY }}
+        run: curl https://jess.umputun.com/update/remark42-site/${UPDATER_KEY}

.github/workflows/ci-test-backend.yml

@@ -0,0 +1,64 @@
+name: test_backend
+
+on:
+  push:
+    branches:
+    tags:
+    paths:
+      - ".github/workflows/ci-test-backend.yml"
+      - "backend/**"
+      - "!backend/scripts/**"
+      - "!**.md"
+  pull_request:
+    paths:
+      - ".github/workflows/ci-test-backend.yml"
+      - "backend/**"
+      - "!backend/scripts/**"
+      - "!**.md"
+jobs:
+  test-backend:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: debug if needed
+        run: if [[ "$DEBUG" == "true" ]]; then env; fi
+        env:
+          DEBUG: ${{secrets.DEBUG}}
+
+      - name: install go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.16
+
+      - name: install golangci-lint and goveralls
+        run: |
+          curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s -- -b $GITHUB_WORKSPACE v1.43.0
+          go get -u github.com/mattn/goveralls
+
+      - name: test and lint backend
+        run: |
+          go test -race -timeout=60s -covermode=atomic -coverprofile=$GITHUB_WORKSPACE/profile.cov_tmp ./...
+          cat $GITHUB_WORKSPACE/profile.cov_tmp | grep -v "_mock.go" > $GITHUB_WORKSPACE/profile.cov
+          $GITHUB_WORKSPACE/golangci-lint --config ${GITHUB_WORKSPACE}/backend/.golangci.yml run --out-format=github-actions ./...
+        working-directory: backend/app
+        env:
+          GOFLAGS: "-mod=vendor"
+          TZ: "America/Chicago"
+
+      - name: test and lint examples
+        run: |
+          go version
+          $GITHUB_WORKSPACE/golangci-lint version
+          go test -race ./...
+          $GITHUB_WORKSPACE/golangci-lint --config ${GITHUB_WORKSPACE}/backend/.golangci.yml run --out-format=github-actions ./...
+        working-directory: backend/_example/memory_store
+        env:
+          TZ: "America/Chicago"
+
+      - name: submit coverage
+        run: $(go env GOPATH)/bin/goveralls -service="github" -coverprofile=$GITHUB_WORKSPACE/profile.cov
+        working-directory: backend
+        env:
+          COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -8,9 +8,6 @@ debug
 debug.test
 .vscode
 .idea/
-/frontend/node_modules/
-/frontend/public/
-/frontend/coverage
 *.prof
 *.test
 /rest-client.env.json
@@ -19,3 +16,9 @@ debug.test
 remark42
 /bin/
 /backend/var/
+/backend/app/var/
+compose-private-backend.yml
+compose-private-frontend.yml
+compose-private.yml
+/backend/_example/*/vendor
+http-client.env.json

.travis.yml

@@ -1,25 +0,0 @@
-install:
-  - docker --version
-  - docker-compose --version
-
-script:
-  - docker run -d --name=mongo mongo:3.6 && sleep 3
-  - export MONGO_TEST=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' mongo)
-  - echo "running mongo on $MONGO_TEST"
-  - docker build
-      --build-arg COVERALLS_TOKEN=$COVERALLS_TOKEN
-      --build-arg CI=$CI
-      --build-arg TRAVIS=$TRAVIS
-      --build-arg TRAVIS_BRANCH=$TRAVIS_BRANCH
-      --build-arg TRAVIS_COMMIT=$TRAVIS_COMMIT
-      --build-arg TRAVIS_JOB_ID=$TRAVIS_JOB_ID
-      --build-arg TRAVIS_JOB_NUMBER=$TRAVIS_JOB_NUMBER
-      --build-arg TRAVIS_OS_NAME=$TRAVIS_OS_NAME
-      --build-arg TRAVIS_PULL_REQUEST=$TRAVIS_PULL_REQUEST
-      --build-arg TRAVIS_PULL_REQUEST_SHA=$TRAVIS_PULL_REQUEST_SHA
-      --build-arg TRAVIS_REPO_SLUG=$TRAVIS_REPO_SLUG
-      --build-arg TRAVIS_TAG=$TRAVIS_TAG
-      --build-arg MONGO_TEST=$MONGO_TEST
-      .
-  - docker rm -f mongo
-  

Dockerfile

@@ -1,17 +1,6 @@
-FROM umputun/baseimage:buildgo-latest as build-backend
+FROM umputun/baseimage:buildgo-v1.8.0 as build-backend
 
-ARG COVERALLS_TOKEN
 ARG CI
-ARG TRAVIS
-ARG TRAVIS_BRANCH
-ARG TRAVIS_COMMIT
-ARG TRAVIS_JOB_ID
-ARG TRAVIS_JOB_NUMBER
-ARG TRAVIS_OS_NAME
-ARG TRAVIS_PULL_REQUEST
-ARG TRAVIS_PULL_REQUEST_SHA
-ARG TRAVIS_REPO_SLUG
-ARG TRAVIS_TAG
 ARG DRONE
 ARG DRONE_TAG
 ARG DRONE_COMMIT
@@ -19,48 +8,34 @@ ARG DRONE_BRANCH
 ARG DRONE_PULL_REQUEST
 
 ARG SKIP_BACKEND_TEST
-ARG MONGO_TEST
+ARG BACKEND_TEST_TIMEOUT
 
 ADD backend /build/backend
-ADD .git /build/.git
+ADD .git/ /build/backend/.git/
 WORKDIR /build/backend
 
 ENV GOFLAGS="-mod=vendor"
 
+# install gcc in order to be able to go test package with -race
+RUN apk --no-cache add gcc libc-dev
+
 # run tests
 RUN \
-    if [ -f .mongo ] ; then export MONGO_TEST=$(cat .mongo) ; fi && \
     cd app && \
     if [ -z "$SKIP_BACKEND_TEST" ] ; then \
-        go test -covermode=count -coverprofile=/profile.cov_tmp ./... && \
+        CGO_ENABLED=1 go test -race -p 1 -timeout="${BACKEND_TEST_TIMEOUT:-300s}" -covermode=atomic -coverprofile=/profile.cov_tmp ./... && \
         cat /profile.cov_tmp | grep -v "_mock.go" > /profile.cov ; \
-    else echo "skip backend test" ; fi
-
-RUN echo "mongo=${MONGO_TEST}" >> /etc/hosts
-
-# linters
-RUN if [ -z "$SKIP_BACKEND_TEST" ] ; then \
-    if [ -f .mongo ] ; then export MONGO_TEST=$(cat .mongo) ; fi && \
-        golangci-lint run --out-format=tab --disable-all --tests=false --enable=unconvert \
-        --enable=megacheck --enable=structcheck --enable=gas --enable=gocyclo --enable=dupl --enable=misspell \
-        --enable=unparam --enable=varcheck --enable=deadcode --enable=typecheck \
-        --enable=ineffassign --enable=varcheck ./... ; \
-    else echo "skip backend linters" ; fi
-
-# submit coverage to coverals if COVERALLS_TOKEN in env
-RUN if [ -z "$COVERALLS_TOKEN" ] ; then \
-    echo "coverall not enabled" ; \
-    else goveralls -coverprofile=/profile.cov -service=travis-ci -repotoken $COVERALLS_TOKEN || echo "coverall failed!"; fi
+        golangci-lint run --config ../.golangci.yml ./... ; \
+    else echo "skip backend tests and linter" ; fi
 
 # if DRONE presented use DRONE_* git env to make version
 RUN \
-    if [ -z "$DRONE" ] ; then echo "runs outside of drone" && version="local"; \
-    else version=${DRONE_TAG}${DRONE_BRANCH}${DRONE_PULL_REQUEST}-${DRONE_COMMIT:0:7}-$(date +%Y%m%d-%H:%M:%S); fi && \
+    if [ -z "$DRONE" ] ; then echo "runs outside of drone" && version="$(/script/git-rev.sh)" ; \
+    else version=${DRONE_TAG}${DRONE_BRANCH}${DRONE_PULL_REQUEST}-${DRONE_COMMIT:0:7}-$(date +%Y%m%d-%H:%M:%S) ; fi && \
     echo "version=$version" && \
     go build -o remark42 -ldflags "-X main.revision=${version} -s -w" ./app
 
-
-FROM node:10.11-alpine as build-frontend-deps
+FROM node:12.16-alpine as build-frontend-deps
 
 ARG CI
 ENV HUSKY_SKIP_INSTALL=true
@@ -68,9 +43,9 @@ ENV HUSKY_SKIP_INSTALL=true
 RUN apk add --no-cache --update git
 ADD frontend/package.json /srv/frontend/package.json
 ADD frontend/package-lock.json /srv/frontend/package-lock.json
-RUN cd /srv/frontend && CI=true npm ci
+RUN cd /srv/frontend && CI=true npm ci --loglevel warn
 
-FROM node:10.11-alpine as build-frontend
+FROM node:12.16-alpine as build-frontend
 
 ARG CI
 ARG SKIP_FRONTEND_TEST
@@ -79,28 +54,29 @@ ARG NODE_ENV=production
 COPY --from=build-frontend-deps /srv/frontend/node_modules /srv/frontend/node_modules
 ADD frontend /srv/frontend
 RUN cd /srv/frontend && \
-    if [ -z "$SKIP_FRONTEND_TEST" ] ; then npx run-p lint test build ; \
+    if [ -z "$SKIP_FRONTEND_TEST" ] ; then npx run-p lint test check; \
     else echo "skip frontend tests and lint" ; npm run build ; fi && \
     rm -rf ./node_modules
 
-
-FROM umputun/baseimage:app-latest
+FROM umputun/baseimage:app-v1.8.0
 
 WORKDIR /srv
 
-ADD entrypoint.sh /entrypoint.sh
+ADD docker-init.sh /entrypoint.sh
 ADD backend/scripts/backup.sh /usr/local/bin/backup
 ADD backend/scripts/restore.sh /usr/local/bin/restore
 ADD backend/scripts/import.sh /usr/local/bin/import
 RUN chmod +x /entrypoint.sh /usr/local/bin/backup /usr/local/bin/restore /usr/local/bin/import
 
 COPY --from=build-backend /build/backend/remark42 /srv/remark42
+COPY --from=build-backend /build/backend/templates /srv
 COPY --from=build-frontend /srv/frontend/public/ /srv/web
+COPY docker-init.sh /srv/init.sh
 RUN chown -R app:app /srv
 RUN ln -s /srv/remark42 /usr/bin/remark42
 
 EXPOSE 8080
 HEALTHCHECK --interval=30s --timeout=3s CMD curl --fail http://localhost:8080/ping || exit 1
 
-CMD ["server"]
-ENTRYPOINT ["/entrypoint.sh"]
+RUN chmod +x /srv/init.sh
+CMD ["/srv/remark42", "server"]

Dockerfile.artifacts

@@ -1,4 +1,4 @@
-FROM node:10.11-alpine as build-frontend-deps
+FROM node:12.16-alpine as build-frontend-deps
 
 ARG CI
 ARG DRONE
@@ -13,7 +13,7 @@ ADD frontend/package.json /srv/frontend/package.json
 ADD frontend/package-lock.json /srv/frontend/package-lock.json
 RUN cd /srv/frontend && CI=true npm ci
 
-FROM node:10.11-alpine as build-frontend
+FROM node:12.16-alpine as build-frontend
 
 ARG CI
 ARG NODE_ENV=production
@@ -26,72 +26,62 @@ RUN cd /srv/frontend && \
     npm run build && \
     rm -rf ./node_modules
 
-
 FROM umputun/baseimage:buildgo-latest as build-backend
 
 ARG GITHUB_TOKEN
 ENV SKIP_BACKEND_TEST=true
 
-WORKDIR /go/src/github.com/umputun/remark/backend
-ADD backend /go/src/github.com/umputun/remark/backend
-ADD README.md /go/src/github.com/umputun/remark/
-ADD LICENSE /go/src/github.com/umputun/remark/
+WORKDIR /build/backend
+ADD backend /build/backend
+ADD README.md /build/
+ADD LICENSE /build/
+
+ADD .git/ /build/backend/.git/
+
 COPY --from=build-frontend /srv/frontend/public/ web
 
 RUN \
-    export WEB_ROOT=/go/src/github.com/umputun/remark/backend/web && \
-    sed -i "s|https://demo.remark42.com|http://127.0.0.1:8080|g" ${WEB_ROOT}/*.js && \
-    sed -i "/REMOVE-START/,/REMOVE-END/d" ${WEB_ROOT}/iframe.html && \
-    go get -v github.com/rakyll/statik && \
-    statik --src=${WEB_ROOT} --dest=/go/src/github.com/umputun/remark/backend/app/rest -p api -f && \
-    ls -la /go/src/github.com/umputun/remark/backend/app/rest/api/statik.go && \
-    ls -la /go/src/github.com/umputun/remark/backend/web/
+    export WEB_ROOT=/build/backend/web && \
+    find . -regex '.*\.\(html\|js\|mjs\)$' -print -exec sed -i "s|{% REMARK_URL %}|http://127.0.0.1:8080|g" {} \; && \
+    statik --src=${WEB_ROOT} --dest=/build/backend/app/rest -p api -f && \
+    statik --src=/build/backend/templates --dest=/build/backend/app -p templates -ns templates -f && \
+    ls -la /build/backend/app/templates/statik.go && \
+    ls -la /build/backend/app/rest/api/statik.go && \
+    ls -la /build/backend/web/
 
 # if DRONE presented use DRONE_* git env to make version
 RUN \
     if [ -z "$DRONE" ] ; then \
-    echo "runs outside of drone" && version="local"; \
+    echo "runs outside of drone" && version=$("/script/version.sh"); \
     else version=${DRONE_TAG}${DRONE_BRANCH}${DRONE_PULL_REQUEST}-${DRONE_COMMIT:0:7}-$(date +%Y%m%d-%H:%M:%S); fi && \
     echo "version=$version" && \
+    export GOFLAGS="-mod=vendor" && \
     GOOS=linux GOARCH=amd64 go build -o remark42.linux-amd64 -ldflags "-X main.revision=${version} -s -w" ./app && \
     GOOS=linux GOARCH=386 go build -o remark42.linux-386 -ldflags "-X main.revision=${version} -s -w" ./app && \
+    GOOS=linux GOARCH=arm go build -o remark42.linux-arm -ldflags "-X main.revision=${version} -s -w" ./app && \
     GOOS=linux GOARCH=arm64 go build -o remark42.linux-arm64 -ldflags "-X main.revision=${version} -s -w" ./app && \
     GOOS=windows GOARCH=amd64 go build -o remark42.windows-amd64.exe -ldflags "-X main.revision=${version} -s -w" ./app && \
-    GOOS=darwin GOARCH=amd64 go build -o remark42.darwin-amd64 -ldflags "-X main.revision=${version} -s -w" ./app
+    GOOS=darwin GOARCH=amd64 go build -o remark42.darwin-amd64 -ldflags "-X main.revision=${version} -s -w" ./app && \
+    GOOS=darwin GOARCH=arm64 go build -o remark42.darwin-arm64 -ldflags "-X main.revision=${version} -s -w" ./app && \
+    GOOS=freebsd GOARCH=amd64 go build -o remark42.freebsd-amd64 -ldflags "-X main.revision=${version} -s -w" ./app
 
 RUN \
     if [ -z "$DRONE_TAG" ] ; then \
     echo "runs outside of drone" && tag=""; \
     else tag=_${DRONE_TAG}; fi && \
     apk add --no-cache --update zip && \
-    tar cvzf remark42${tag}.linux-amd64.tar.gz remark42.linux-amd64 ../LICENSE ../README.md && \
-    tar cvzf remark42${tag}.linux-386.tar.gz remark42.linux-386 ../LICENSE ../README.md && \
-    tar cvzf remark42${tag}.linux-arm64.tar.gz remark42.linux-arm64 ../LICENSE ../README.md && \
-    tar cvzf remark42${tag}.darwin-amd64.tar.gz remark42.darwin-amd64 ../LICENSE ../README.md && \
-    zip remark42${tag}.windows-amd64.zip remark42.windows-amd64.exe ../LICENSE ../README.md
+    cp ../LICENSE ./LICENSE && cp ../README.md ./README.md && \
+    tar cvzf remark42${tag}.linux-amd64.tar.gz remark42.linux-amd64 LICENSE README.md && \
+    tar cvzf remark42${tag}.linux-386.tar.gz remark42.linux-386 LICENSE README.md && \
+    tar cvzf remark42${tag}.linux-arm.tar.gz remark42.linux-arm LICENSE README.md && \
+    tar cvzf remark42${tag}.linux-arm64.tar.gz remark42.linux-arm64 LICENSE README.md && \
+    tar cvzf remark42${tag}.darwin-amd64.tar.gz remark42.darwin-amd64 LICENSE README.md && \
+    tar cvzf remark42${tag}.darwin-arm64.tar.gz remark42.darwin-arm64 LICENSE README.md && \
+    tar cvzf remark42${tag}.freebsd-amd64.tar.gz remark42.freebsd-amd64 LICENSE README.md && \
+    zip remark42${tag}.windows-amd64.zip remark42.windows-amd64.exe LICENSE README.md
 
-# upload to github
-RUN \
-    if [ -z "$DRONE_TAG" ] ; then \
-    echo "skip upload to github" ; \
-    else \
-    curl -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.manifold-preview" \
-    -H "Content-Type: application/gzip" --data-binary @remark42_${DRONE_TAG}.linux-amd64.tar.gz \
-    "https://uploads.github.com/repos/umputun/remark/releases/${DRONE_TAG}/assets?name=remark_${DRONE_TAG}.linux-amd64.tar.gz" && \
-    curl -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.manifold-preview" \
-    -H "Content-Type: application/gzip" --data-binary @remark42_${DRONE_TAG}.linux-386.tar.gz \
-    "https://uploads.github.com/repos/umputun/remark/releases/${DRONE_TAG}/assets?name=remark_${DRONE_TAG}.linux-386.tar.gz" && \
-    curl -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.manifold-preview" \
-    -H "Content-Type: application/gzip" --data-binary @remark42_${DRONE_TAG}.linux-arm64.tar.gz \
-    "https://uploads.github.com/repos/umputun/remark/releases/${DRONE_TAG}/assets?name=remark_${DRONE_TAG}.linux-arm64.tar.gz" && \
-    curl -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.manifold-preview" \
-    -H "Content-Type: application/gzip" --data-binary @remark42_${DRONE_TAG}.darwin-amd64.tar.gz \
-    "https://uploads.github.com/repos/umputun/remark/releases/${DRONE_TAG}/assets?name=remark_${DRONE_TAG}.darwin-amd64.tar.gz" && \
-    curl -H "Authorization: token $GITHUB_TOKEN" -H "Accept: application/vnd.github.manifold-preview" \
-    -H "Content-Type: application/zip" --data-binary @remark42_${DRONE_TAG}.windows-amd64.zip \
-    "https://uploads.github.com/repos/umputun/remark/releases/${DRONE_TAG}/assets?name=remark_${DRONE_TAG}.windows-amd64.zip"; fi
 
 FROM alpine
-COPY --from=build-backend /go/src/github.com/umputun/remark/backend/remark42.* /artifacts/
+COPY --from=build-backend /build/backend/remark42.* /artifacts/
 RUN ls -la /artifacts/*
 CMD ["sleep", "100"]

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018 Umputun
+Copyright (c) 2021 Umputun
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Makefile

@@ -11,8 +11,13 @@ bin:
 docker:
 	docker build -t umputun/remark42 --build-arg SKIP_FRONTEND_TEST=true --build-arg SKIP_BACKEND_TEST=true .
 
-deploy:
-	docker build -f Dockerfile.artifacts -t remark42.bin .
+dockerx:
+	docker buildx build --build-arg SKIP_FRONTEND_TEST=true --build-arg SKIP_BACKEND_TEST=true \
+		  --progress=plain --platform linux/amd64,linux/arm/v7,linux/arm64 \
+		  -t ghcr.io/umputun/remark42:master -t umputun/remark42:master .
+
+release:
+	docker build -f Dockerfile.artifacts --no-cache --pull -t remark42.bin .
 	- @docker rm -f remark42.bin 2>/dev/null || exit 0
 	- @mkdir -p bin
 	docker run -d --name=remark42.bin remark42.bin
@@ -20,7 +25,22 @@ deploy:
 	docker cp remark42.bin:/artifacts/remark42.linux-386.tar.gz bin/remark42.linux-386.tar.gz
 	docker cp remark42.bin:/artifacts/remark42.linux-arm64.tar.gz bin/remark42.linux-arm64.tar.gz
 	docker cp remark42.bin:/artifacts/remark42.darwin-amd64.tar.gz bin/remark42.darwin-amd64.tar.gz
+	docker cp remark42.bin:/artifacts/remark42.freebsd-amd64.tar.gz bin/remark42.freebsd-amd64.tar.gz
 	docker cp remark42.bin:/artifacts/remark42.windows-amd64.zip bin/remark42.windows-amd64.zip
 	docker rm -f remark42.bin
 
-.PHONY: bin
+race_test:
+	cd backend/app && go test -race -mod=vendor -timeout=60s -count 1 ./...
+
+backend:
+	docker-compose -f compose-dev-backend.yml build
+
+frontend:
+	docker-compose -f compose-dev-frontend.yml build
+
+rundev:
+	docker pull umputun/baseimage:buildgo-latest
+	SKIP_BACKEND_TEST=true SKIP_FRONTEND_TEST=true docker-compose -f compose-private.yml build
+	docker-compose -f compose-private.yml up
+
+.PHONY: bin backend

README.md

@@ -1,11 +1,12 @@
-# remark42 [![Build Status](https://travis-ci.org/umputun/remark.svg?branch=master)](https://travis-ci.org/umputun/remark) [![Go Report Card](https://goreportcard.com/badge/github.com/umputun/remark)](https://goreportcard.com/report/github.com/umputun/remark)  [![Coverage Status](https://coveralls.io/repos/github/umputun/remark/badge.svg?branch=master)](https://coveralls.io/github/umputun/remark?branch=master)
+# Remark42 [![Build Status](https://github.com/umputun/remark42/workflows/build/badge.svg)](https://github.com/umputun/remark42/actions) [![Go Report Card](https://goreportcard.com/badge/github.com/umputun/remark42)](https://goreportcard.com/report/github.com/umputun/remark42) [![Coverage Status](https://coveralls.io/repos/github/umputun/remark42/badge.svg?branch=master)](https://coveralls.io/github/umputun/remark42?branch=master) [![codecov](https://codecov.io/gh/umputun/remark42/branch/master/graph/badge.svg)](https://app.codecov.io/gh/umputun/remark42)
 
-Remark42 is a self-hosted, lightweight, and simple (yet functional) comment engine, which doesn't spy on users. It can be embedded into blogs, articles or any other place where readers add comments.
+Remark42 is a self-hosted, lightweight and simple (yet functional) comment engine, which doesn't spy on users. It can be embedded into blogs, articles, or any other place where readers add comments.
 
-* Social login via Google, Facebook, Github and Yandex
+* Social login via Google, Twitter, Facebook, Microsoft, GitHub, Yandex, Patreon and Telegram
+* Login via email
 * Optional anonymous access
 * Multi-level nested comments with both tree and plain presentations
-* Import from disqus and wordpress
+* Import from Disqus and WordPress
 * Markdown support with friendly formatter toolbar
 * Moderator can remove comments and block users
 * Voting, pinning and verification system
@@ -13,685 +14,30 @@ Remark42 is a self-hosted, lightweight, and simple (yet functional) comment engi
 * Images upload with drag-and-drop
 * Extractor for recent comments, cross-post
 * RSS for all comments and each post
-* Telegram notifications
-* Export data to json with automatic backups
+* Telegram, Slack, Webhook and email notifications for Admins (get notified for each new comment)
+* Email and Telegram notifications for users (get notified when someone responds to your comment)
+* Export data to JSON with automatic backups
 * No external databases, everything embedded in a single data file
 * Fully dockerized and can be deployed in a single command
-* Self-contained executable can be deployed directly to Linux, Windows and MacOS
+* Self-contained executable can be deployed directly to Linux, Windows and macOS
 * Clean, lightweight and customizable UI with white and dark themes
 * Multi-site mode from a single instance
-* Integration with automatic ssl (direct and via [nginx-le](https://github.com/umputun/nginx-le))
+* Integration with automatic SSL (direct and via [nginx-le](https://github.com/nginx-le/nginx-le))
 * [Privacy focused](#privacy)
 
+[Demo site](https://remark42.com/demo/) available with all authentication methods, including email auth and anonymous access.
 
-#
+<details><summary>Screenshots</summary>
 
-  - [Install](#install)
-    - [Backend](#backend)
-      - [With Docker](#with-docker)
-      - [Without docker](#without-docker)
-      - [Parameters](#parameters)
-        - [Required parameters](#required-parameters)
-      - [Quick installation test](#quick-installation-test)
-      - [Register oauth2 providers](#register-oauth2-providers)
-        - [Google Auth Provider](#google-auth-provider)
-        - [GitHub Auth Provider](#github-auth-provider)
-        - [Facebook Auth Provider](#facebook-auth-provider)
-        - [Yandex Auth Provider](#yandex-auth-provider)
-      - [Initial import from Disqus](#initial-import-from-disqus)
-      - [Initial import from WordPress](#initial-import-from-wordpress)
-      - [Backup and restore](#backup-and-restore)
-        - [Automatic backups](#automatic-backups)
-        - [Manual backup](#manual-backup)
-        - [Restore from backup](#restore-from-backup)
-        - [Backup format](#backup-format)
-      - [Admin users](#admin-users)
-    - [Setup on your website](#setup-on-your-website)
-      - [Comments](#comments)
-      - [Last comments](#last-comments)
-      - [Counter](#counter)
-  - [Build from the source](#build-from-the-source)
-  - [Development](#development)
-    - [Backend development](#backend-development)
-    - [Frontend development](#frontend-development)
-      - [Build](#build)
-      - [Devserver](#devserver)
-  - [API](#api)
-    - [Authorization](#authorization)
-    - [Commenting](#commenting)
-    - [RSS feeds](#rss-feeds)
-    - [Admin](#admin)
-  - [Privacy](#privacy)
-  - [Technical details](#technical-details)
+Comments example:
+![](screenshots/comments.png)
 
+For admin screenshots see [Admin UI wiki](https://github.com/umputun/remark42/wiki/Admin-UI)
+</details>
 
-## Install
+All remark42 documentation is available [by the link](https://remark42.com/docs/).
 
-### Backend
+## Related projects
 
-#### With Docker
-
-_this is the recommended way to run remark42_
-
-* copy provided `docker-compose.yml` and customize for your needs
-* make sure you **don't keep** `ADMIN_PASSWD=something...` for any non-development deployments
-* pull prepared images from the docker hub and start - `docker-compose pull && docker-compose up -d`
-* alternatively compile from the sources - `docker-compose build && docker-compose up -d`
-
-#### Without docker
-
-* download archive for [stable release](https://github.com/umputun/remark/releases) or [development version](https://remark42.com/downloads)
-* unpack with `gunzip` (Linux, macOS) or with `zip` (Windows)
-* run as `remark42.{os}-{arch} server {parameters...}`, i.e. `remark42.linux-amd64 server --secret=12345 --url=http://127.0.0.1:8080`
-* alternatively compile from the sources - `make OS=[linux|darwin|windows] ARCH=[amd64,386,arm64,arm32]`
-
-#### Parameters
-
-| Command line            | Environment             | Default                  | Description                                      |
-| ----------------------- | ----------------------- | ------------------------ | ------------------------------------------------ |
-| url                     | REMARK_URL              |                          | url to remark42 server, _required_               |
-| secret                  | SECRET                  |                          | secret key, _required_                           |
-| site                    | SITE                    | `remark`                 | site name(s), _multi_                            |
-| store.type              | STORE_TYPE              | `bolt`                   | type of storage, `bolt` or `mongo`               |
-| store.bolt.path         | STORE_BOLT_PATH         | `./var`                  | path to data directory                           |
-| store.bolt.timeout      | STORE_BOLT_TIMEOUT      | `30s`                    | boltdb access timeout                            |
-| mongo.url               | MONGO_URL               |                          | mongo url for all stores using mongodb           |
-| mongo.db                | MONGO_DB                |                          | mongo database                                   |
-| admin.shared.id         | ADMIN_SHARED_ID         |                          | admin names (list of user ids), _multi_          |
-| admin.shared.email      | ADMIN_SHARED_EMAIL      | `admin@${REMARK_URL}`    | admin email                                      |
-| backup                  | BACKUP_PATH             | `./var/backup`           | backups location                                 |
-| max-back                | MAX_BACKUP_FILES        | `10`                     | max backup files to keep                         |
-| cache.max.items         | CACHE_MAX_ITEMS         | `1000`                   | max number of cached items, `0` - unlimited      |
-| cache.max.value         | CACHE_MAX_VALUE         | `65536`                  | max size of cached value, `0` - unlimited        |
-| cache.max.size          | CACHE_MAX_SIZE          | `50000000`               | max size of all cached values, `0` - unlimited   |
-| avatar.type             | AVATAR_TYPE             | `fs`                     | type of avatar storage, `fs`, `bolt`, or `mongo` |
-| avatar.fs.path          | AVATAR_FS_PATH          | `./var/avatars`          | avatars location for `fs` store                  |
-| avatar.bolt.file        | AVATAR_BOLT_FILE        | `./var/avatars.db`       | file name for  `bolt` store                      |
-| avatar.rsz-lmt          | AVATAR_RSZ_LMT          | `0` (disabled)           | max image size for resizing avatars on save      |
-| image.type              | IMAGE_TYPE              | `fs`                     | type of image storage, `fs`, 'bolt`, or `mongo`  |
-| image.max-size          | IMAGE_MAX_SIZE          | `5000000`                | max size of image file                           |
-| image.fs.path           | IMAGE_FS_PATH           | `./var/pictures`         | permanent location of images                     |
-| image.fs.staging        | IMAGE_FS_STAGING        | `./var/pictures.staging` | staging location of images                       |
-| image.fs.partitions     | IMAGE_FS_PARTITIONS     | `100`                    | number of image partitions                       |
-| image.resize-width      | IMAGE_RESIZE_WIDTH      | `800`                    | width of resized image                          |
-| image.resize-height     | IMAGE_RESIZE_HEIGHT     | `300`                    | height of resized image                          |
-| auth.ttl.jwt            | AUTH_TTL_JWT            | `5m`                     | jwt TTL                                          |
-| auth.ttl.cookie         | AUTH_TTL_COOKIE         | `200h`                   | cookie TTL                                       |
-| auth.google.cid         | AUTH_GOOGLE_CID         |                          | Google OAuth client ID                           |
-| auth.google.csec        | AUTH_GOOGLE_CSEC        |                          | Google OAuth client secret                       |
-| auth.facebook.cid       | AUTH_FACEBOOK_CID       |                          | Facebook OAuth client ID                         |
-| auth.facebook.csec      | AUTH_FACEBOOK_CSEC      |                          | Facebook OAuth client secret                     |
-| auth.github.cid         | AUTH_GITHUB_CID         |                          | Github OAuth client ID                           |
-| auth.github.csec        | AUTH_GITHUB_CSEC        |                          | Github OAuth client secret                       |
-| auth.yandex.cid         | AUTH_YANDEX_CID         |                          | Yandex OAuth client ID                           |
-| auth.yandex.csec        | AUTH_YANDEX_CSEC        |                          | Yandex OAuth client secret                       |
-| auth.dev                | AUTH_DEV                | `false`                  | local oauth2 server, development mode only       |
-| auth.anon               | AUTH_ANON               | `false`                  | enable anonymous login                           |
-| notify.type             | NOTIFY_TYPE             | none                     | type of notification (none or telegram)          |
-| notify.queue            | NOTIFY_QUEUE            | `100`                    | size of notification queue                       |
-| notify.telegram.token   | NOTIFY_TELEGRAM_TOKEN   |                          | telegram token                                   |
-| notify.telegram.chan    | NOTIFY_TELEGRAM_CHAN    |                          | telegram channel                                 |
-| notify.telegram.timeout | NOTIFY_TELEGRAM_TIMEOUT | `5s`                     | telegram timeout                                 |
-| ssl.type                | SSL_TYPE                | none                     | `none`-http, `static`-https, `auto`-https + le   |
-| ssl.port                | SSL_PORT                | `8443`                   | port for https server                            |
-| ssl.cert                | SSL_CERT                |                          | path to cert.pem file                            |
-| ssl.key                 | SSL_KEY                 |                          | path to key.pem file                             |
-| ssl.acme-location       | SSL_ACME_LOCATION       | `./var/acme`             | dir where obtained le-certs will be stored       |
-| ssl.acme-email          | SSL_ACME_EMAIL          |                          | admin email for receiving notifications from LE  |
-| max-comment             | MAX_COMMENT_SIZE        | `2048`                   | comment's size limit                             |
-| max-votes               | MAX_VOTES               | `-1`                     | votes limit per comment, `-1` - unlimited        |
-| low-score               | LOW_SCORE               | `-5`                     | low score threshold                              |
-| positive-score          | POSITIVE_SCORE          | `false`                  | enable positive score only                       |
-| critical-score          | CRITICAL_SCORE          | `-10`                    | critical score threshold                         |
-| positive-score          | POSITIVE_SCORE          | `false`                  | restricts comment's score to be only positive    |
-| restricted-words        | RESTRICTED_WORDS        |                          | words banned in comments (can use `*`), _multi_  |
-| edit-time               | EDIT_TIME               | `5m`                     | edit window                                      |
-| read-age                | READONLY_AGE            |                          | read-only age of comments, days                  |
-| img-proxy               | IMG_PROXY               | `false`                  | enable http->https proxy for images              |
-| update-limit            | UPDATE_LIMIT            | `0.5`                    | updates/sec limit                                |
-| admin-passwd            | ADMIN_PASSWD            | none (disabled)          | password for `admin` basic auth                  |
-| dbg                     | DEBUG                   | `false`                  | debug mode                                       |
-
-* command line parameters are long form `--<key>=value`, i.e. `--site=https://demo.remark42.com`
-* _multi_ parameters separated by `,` in the environment or repeated with command line key, like `--site=s1 --site=s2 ...`
-* _required_ parameters have to be presented in the environment or provided in command line
-
-##### Required parameters
-
-Most of the parameters have sane defaults and don't require customization. There are only a few parameters user has to define:
-
-1. `SECRET` - secret key, can be any long and hard-to-guess string.
-2. `REMARK_URL` - url pointing to your remark42 server, i.e. `https://demo.reamark42.com`
-3. At least one pair of `AUTH_<PROVIDER>_CID` and `AUTH_<PROVIDER>_CSEC` defining oauth2 provider(s)
-
-The minimal `docker-compose.yml` has to include all required parameters:
-
-```yaml
-version: '2'
-
-services:
-    remark42:
-        image: umputun/remark42:latest
-        restart: always
-        container_name: "remark42"
-        environment:
-            - REMARK_URL=https://demo.remark42.com  # url pointing to your remark42 server
-            - SITE=YOUR_SITE_ID                     # site ID, same as used for `site_id`, see "Setup on your website"
-            - SECRET=abcd-123456-xyz-$%^&           # secret key
-            - AUTH_GITHUB_CID=12345667890           # oauth2 client ID
-            - AUTH_GITHUB_CSEC=abcdefg12345678      # oauth2 client secret
-        volumes:
-            - ./var:/srv/var                        # persistent volume to store all remark42 data
-```
-
-#### Quick installation test
-
-To verify if remark has been properly installed, check a demo page at `${REMARK_URL}/web` URL. Make sure to include `remark` site id to `${SITE}` list.
-
-#### Register oauth2 providers
-
-Authentication handled by external providers. You should setup oauth2 for all (or some) of them to allow users to make comments. It is not mandatory to have all of them, but at least one should be correctly configured.
-
-##### Google Auth Provider
-
-1.  Create a new project: https://console.developers.google.com/project
-1.  Choose the new project from the top right project dropdown (only if another project is selected)
-1.  In the project Dashboard center pane, choose **"API Manager"**
-1.  In the left Nav pane, choose **"Credentials"**
-1.  In the center pane, choose **"OAuth consent screen"** tab. Fill in **"Product name shown to users"** and hit save.
-1.  In the center pane, choose **"Credentials"** tab.
-    * Open the **"New credentials"** drop down
-    * Choose **"OAuth client ID"**
-    * Choose **"Web application"**
-    * Application name is freeform, choose something appropriate
-    * Authorized origins is your domain ex: `https://remark42.mysite.com`
-    * Authorized redirect URIs is the location of oauth2/callback constructed as domain + `/auth/google/callback`, ex: `https://remark42.mysite.com/auth/google/callback`
-    * Choose **"Create"**
-1.  Take note of the **Client ID** and **Client Secret**
-
-_instructions for google oauth2 setup borrowed from [oauth2_proxy](https://github.com/bitly/oauth2_proxy)_
-
-##### GitHub Auth Provider
-
-1.  Create a new **"OAuth App"**: https://github.com/settings/developers
-1.  Fill **"Application Name"** and **"Homepage URL"** for your site
-1.  Under **"Authorization callback URL"** enter the correct url constructed as domain + `/auth/github/callback`. ie `https://remark42.mysite.com/auth/github/callback`
-1.  Take note of the **Client ID** and **Client Secret**
-
-##### Facebook Auth Provider
-
-1.  From https://developers.facebook.com select **"My Apps"** / **"Add a new App"**
-1.  Set **"Display Name"** and **"Contact email"**
-1.  Choose **"Facebook Login"** and then **"Web"**
-1.  Set "Site URL" to your domain, ex: `https://remark42.mysite.com`
-1.  Under **"Facebook login"** / **"Settings"** fill "Valid OAuth redirect URIs" with your callback url constructed as domain + `/auth/facebook/callback`
-1.  Select **"App Review"** and turn public flag on. This step may ask you to provide a link to your privacy policy.
-
-##### Yandex Auth Provider
-
-1.  Create a new **"OAuth App"**: https://oauth.yandex.com/client/new
-1.  Fill **"App name"** for your site
-1.  Under **Platforms** select **"Web services"** and enter **"Callback URI #1"** constructed as domain + `/auth/yandex/callback`. ie `https://remark42.mysite.com/auth/yandex/callback`
-1.  Select **Permissions**. You need following permissions only from the **"Yandex.Passport API"** section:
-    * Access to user avatar
-    * Access to username, first name and surname, gender
-1.  Fill out the rest of fields if needed
-1.  Take note of the **ID** and **Password**
-
-For more details refer to [Yandex OAuth](https://tech.yandex.com/oauth/doc/dg/concepts/about-docpage/) and [Yandex.Passport](https://tech.yandex.com/passport/doc/dg/index-docpage/) API documentation.
-
-##### Anonymous Auth Provider
-
-Optionally, anonymous access can be turned on. In this case an extra `anonymous` provider will allow logins without any social login with any name satisfying 2 conditions:
-
-- name should be at least 3 characters long
-- name has to start from the letter and contains letters, numbers, underscores and spaces only.
-
-#### Initial import from Disqus
-
-1.  Disqus provides an export of all comments on your site in a g-zipped file. This is found in your Moderation panel at Disqus Admin > Setup > Export. The export will be sent into a queue and then emailed to the address associated with your account once it's ready. Direct link to export will be something like `https://<siteud>.disqus.com/admin/discussions/export/`. See [importing-exporting](https://help.disqus.com/customer/portal/articles/1104797-importing-exporting) for more details.
-2.  Move this file to your remark42 host within `./var` and unzip, i.e. `gunzip <disqus-export-name>.xml.gz`.
-3.  Run import command - `docker exec -it remark42 import -p disqus -f {disqus-export-name}.xml -s {your site id}`
-
-#### Initial import from WordPress
-
-1. Install WordPress [plugin](https://wordpress.org/plugins/wp-exporter/) to export comments and follow it instructions. The plugin should produce a xml-based file with site content including comments.
-2. Move this file to your remark42 host within `./var`
-3. Run import command - `docker exec -it remark42 import -p wordpress -f {wordpress-export-name}.xml -s {your site id}`
-
-#### Backup and restore
-
-##### Automatic backups
-Remark42 by default makes daily backup files under `${BACKUP_PATH}` (default `./var/backup`). Backups kept up to `${MAX_BACKUP_FILES}` (default 10). Each backup file contains exported and gzipped content, i.e., all comments. At any point, the user can restore such backup and revert all comments to the desirable state. Note: restore procedure cleans the current data store and replaces all comments with comments from the backup file.
-
-For safety and security reasons restore functionality not exposed outside of your server by default. The recommended way to restore from the backup is to use provided `scripts/restore-backup.sh`. It can run inside the container:
-
-`docker exec -it remark42 restore -f {backup-filename.gz} -s {your site id}`
-
-##### Manual backup
-
-In addition to automatic backups user can make a backup manually. This command makes `userbackup-{site id}-{timestamp}.gz` by default.
-
-`docker exec -it remark42 backup -s {your site id}`
-
-##### Restore from backup
-
-Restore will clean all comments first and then will processed with complete import from a given file.
-
-`docker exec -it remark42 restore -f {backup file name} -s {your site id}`
-
-##### Backup format
-
-Backup file is a text file with all exported comments separated by EOL. Each backup record is a valid json with all key/value
-unmarshaled from `Comment` struct (see below).
-
-#### Admin users
-
-Admins/moderators should be defined in `docker-compose.yml` as a list of user IDs or passed in the command line.
-
-```
-    environment:
-        - ADMIN_SHARED_ID=github_ef0f706a79cc24b17bbbb374cd234a691a034128,github_dae9983158e9e5e127ef2b87a411ef13c891e9e5
-```
-
-To get user id just login and click on your username or any other user you want to promote to admins.
-It will expand login info and show full user ID.
-
-### Setup on your website
-
-#### Comments
-
-It's a main widget which renders list of comments.
-
-Add this snippet to the bottom of web page:
-
-```html
-<script>
-  var remark_config = {
-    host: "REMARK_URL", // hostname of remark server, same as REMARK_URL in backend config, e.g. "https://demo.remark42.com"
-    site_id: 'YOUR_SITE_ID',
-    components: ['embed'] // optional param; which components to load. default to ["embed"]
-                          // to load all components define components as ['embed', 'last-comments', 'counter']
-                          // available component are:
-                          //     - 'embed': basic comments widget
-                          //     - 'last-comments': last comments widget, see `Last Comments` section below
-                          //     - 'counter': counter widget, see `Counter` section below
-    url: 'PAGE_URL', // optional param; if it isn't defined window.location.href will be used
-    max_shown_comments: 10, // optional param; if it isn't defined default value (15) will be used
-    theme: 'dark', // optional param; if it isn't defined default value ('light') will be used
-    page_title: 'Moving to Remark42' // optional param; if it isn't defined `document.title` will be used
-  };
-
-  (function(c) {
-    for(var i = 0; i < c.length; i++){
-      var d = document, s = d.createElement('script');
-      s.src = remark_config.host + '/web/' +c[i] +'.js';
-      s.defer = true;
-      (d.head || d.body).appendChild(s);
-    }
-  })(remark_config.components || ['embed']);
-</script>
-```
-
-And then add this node in the place where you want to see Remark42 widget:
-
-```html
-<div id="remark42"></div>
-```
-
-After that widget will be rendered inside this node.
-
-##### Themes
-
-Right now Remark has two themes: light and dark.
-You can pick one using configuration object,
-but there is also a possibility to switch between themes in runtime.
-For this purpose Remark adds to `window` object named `REMARK42`,
-which contains function `changeTheme`.
-Just call this function and pass a name of the theme that you want to turn on:
-
-```js
-window.REMARK42.changeTheme('light');
-```
-
-#### Last comments
-
-It's a widget which renders list of last comments from your site.
-
-Add this snippet to the bottom of web page, or adjust already present `remark_config` to have `last-comments` in `components` list:
-
-```html
-<script>
-  var remark_config = {
-    host: "REMARK_URL", // hostname of remark server, same as REMARK_URL in backend config, e.g. "https://demo.remark42.com"
-    site_id: 'YOUR_SITE_ID',
-    components: ['last-comments']
-  };
-
-  (function(c) {
-    for(var i = 0; i < c.length; i++){
-      var d = document, s = d.createElement('script');
-      s.src = remark_config.host + '/web/' +c[i] +'.js';
-      s.defer = true;
-      (d.head || d.body).appendChild(s);
-    }
-  })(remark_config.components || ['embed']);
-</script>
-```
-
-And then add this node in the place where you want to see last comments widget:
-
-```html
-<div class="remark42__last-comments" data-max="50"></div>
-```
-
-`data-max` sets the max amount of comments (default: `15`).
-
-#### Counter
-
-It's a widget which renders a number of comments for the specified page.
-
-Add this snippet to the bottom of web page, or adjust already present `remark_config` to have `counter` in `components` list:
-
-```html
-<script>
-  var remark_config = {
-    host: "REMARK_URL", // hostname of remark server, same as REMARK_URL in backend config, e.g. "https://demo.remark42.com"
-    site_id: 'YOUR_SITE_ID',
-    components: ['counter']
-  };
-
-  (function(c) {
-    for(var i = 0; i < c.length; i++){
-      var d = document, s = d.createElement('script');
-      s.src = remark_config.host + '/web/' +c[i] +'.js';
-      s.defer = true;
-      (d.head || d.body).appendChild(s);
-    }
-  })(remark_config.components || ['embed']);
-</script>
-```
-
-And then add a node like this in the place where you want to see a number of comments:
-
-```html
-<span class="remark42__counter" data-url="https://domain.com/path/to/article/"></span>
-```
-
-You can use as many nodes like this as you need to.
-The script will found all them by the class `remark__counter`,
-and it will use `data-url` attribute to define the page with comments.
-
-Also script can uses `url` property from `remark_config` object, or `window.location.href` if nothing else is defined.
-
-## Build from the source
-
-- to build docker container - `make docker`. This command will produce container `umputun/remark42`.
-- to build a single binary for direct execution - `make OS=<linux|windows|darwin> ARCH=<amd64|386>`. This step will produce executable
- `remark42` file with everything embedded.
-
-## Development
-
-You can use fully functional local version to develop and test both frontend & backend.
-
-To bring it up run:
-
-```bash
-# if you mainly work on backend
-docker-compose -f compose-dev-backend.yml build
-docker-compose -f compose-dev-backend.yml up
-# if you mainly work on frontend
-docker-compose -f compose-dev-frontend.yml build
-docker-compose -f compose-dev-frontend.yml up
-```
-
-It starts Remark42 on `127.0.0.1:8080` and adds local OAuth2 provider “Dev”.
-To access UI demo page go to `127.0.0.1:8080/web`.
-By default, you would be logged in as `dev_user` which defined as admin.
-You can tweak any of [supported parameters](#Parameters) in corresponded yml file.
-
-Backend docker compose config by default skips running frontend related tests.
-Frontend docker compose config by default skips running backend related tests and sets `NODE_ENV=development` for frontend build.
-
-### Backend development
-
-In order to run backend locally (development mode, without docker) you have to have latest stable `go` toolchain [installed](https://golang.org/doc/install).
-
-To run backend - `go run backend/app/main.go --dbg --secret=12345 --dev-passwd=password --site=remark --url=http://127.0.0.1:8080`
-It stars backend service with embedded bolt store on port `8080` with basic auth, allowing to authenticate and run requests directly, like this:
-`HTTP http://dev:password@127.0.0.1:8080/api/v1/find?site=remark&sort=-active&format=tree&url=http://127.0.0.1:8080`
-
-To run backend with mongodb store mongo container should be started first - `docker run -d -p 27017:27017 -name=mongo mongo:3.6 --smallfiles` and then
-`go run backend/app/main.go --dbg --secret=12345 --dev-passwd=password --site=remark --url=http://127.0.0.1:8080 --store.type=mongo --store.mongo.url=localhost`
-
-### Frontend development
-
-#### Build
-
-* install [Node.js 8](https://nodejs.org/en/) or higher;
-* install [NPM 6.1.0](https://www.npmjs.com/package/npm);
-* run `npm install` inside `./frontend`;
-* run `npm run build` there;
-* result files will be saved in `./frontend/public`.
-
-**Note** Running `npm install` will set up precommit hooks into your git repository.
-It used to reformat your frontend code using `prettier` and lint with `eslint` before every commit.
-
-#### Devserver
-
-For local development mode with Hot Reloading use `npm start` instead of `npm run build`.
-In this case `webpack` will serve files using `webpack-dev-server` on `localhost:9000`.
-By visiting `127.0.0.1:9000/web` you will get a page with main comments widget
-communicating with demo server backend running on `https://demo.remark42.com`.
-But you will not be able to login with any oauth providers due to security reasons.
-
-You can attach to locally running backend by providing `REMARK_URL` environment variable.
-```sh
-npx cross-env REMARK_URL=http://127.0.0.1:8080 npm start
-```
-
-Developer build running by `webpack-dev-server` supports devtools for [React](https://github.com/facebook/react-devtools) and
-[Redux](https://github.com/zalmoxisus/redux-devtools-extension).
-
-#### Frontend guide
-
-Frontend guide can be found here: [./frontend/README.md](./frontend/README.md)
-
-## API
-
-### Authorization
-
-* `GET /auth/{provider}/login?from=http://url&site=site_id&session=1` - perform "social" login with one of supported providers and redirect to `url`. Presence of `session` (any non-zero value) change the default cookie expiration and makes them session-only.
-* `GET /auth/logout` - logout
-
-```go
-type User struct {
-    Name    string `json:"name"`
-    ID      string `json:"id"`
-    Picture string `json:"picture"`
-    Admin   bool   `json:"admin"`
-    Blocked bool   `json:"block"`
-    Verified bool  `json:"verified"`
-}
-```
-
-_currently supported providers are `google`, `facebook`, `github` and `yandex`_
-
-### Commenting
-
-* `POST /api/v1/comment` - add a comment. _auth required_
-
-```go
-type Comment struct {
-    ID        string          `json:"id"`      // comment ID, read only
-    ParentID  string          `json:"pid"`     // parent ID
-    Text      string          `json:"text"`    // comment text, after md processing
-    Orig      string          `json:"orig"`    // original comment text
-    User      User            `json:"user"`    // user info, read only
-    Locator   Locator         `json:"locator"` // post locator
-    Score     int             `json:"score"`   // comment score, read only
-    Vote      int             `json:"vote"`    // vote for the current user, -1/1/0.
-    Controversy float64       `json:"controversy,omitempty"` // comment controversy, read only
-    Timestamp time.Time       `json:"time"`    // time stamp, read only
-    Edit      *Edit           `json:"edit,omitempty" bson:"edit,omitempty"` // pointer to have empty default in json response
-    Pin       bool            `json:"pin"`     // pinned status, read only
-    Delete    bool            `json:"delete"`  // delete status, read only
-    PostTitle string          `json:"title"`   // post title
-}
-
-type Locator struct {
-    SiteID string `json:"site"`     // site id
-    URL    string `json:"url"`      // post url
-}
-
-type Edit struct {
-  Timestamp time.Time `json:"time" bson:"time"`
-  Summary   string    `json:"summary"`
-}
-```
-
-* `POST /api/v1/preview` - preview comment in html. Body is `Comment` to render
-
-* `GET /api/v1/find?site=site-id&url=post-url&sort=fld&format=tree|plain` - find all comments for given post
-
-This is the primary call used by UI to show comments for given post. It can return comments in two formats - `plain` and `tree`.
-In plain format result will be sorted list of `Comment`. In tree format this is going to be tree-like object with this structure:
-
-```go
-type Tree struct {
-    Nodes []Node `json:"comments"`
-    Info  store.PostInfo `json:"info,omitempty"`
-}
-
-type Node struct {
-    Comment store.Comment `json:"comment"`
-    Replies []Node        `json:"replies,omitempty"`
-}
-```
-
-Sort can be `time`, `active` or `score`. Supported sort order with prefix -/+, i.e. `-time`. For `tree` mode sort will be applied to top-level comments only and all replies always sorted by time.
-
-* `PUT /api/v1/comment/{id}?site=site-id&url=post-url` - edit comment, allowed once in `EDIT_TIME` minutes since creation.  Body is `EditRequest` json
-
-```go
-   type EditRequest struct {
-     Text    string `json:"text"`    // updated text
-     Summary string `json:"summary"` // optional, summary of the edit
-     Delete  bool   `json:"delete"`  // delete flag
-   }{}
-```
-
-* `GET /api/v1/last/{max}?site=site-id` - get up to `{max}` last comments
-* `GET /api/v1/id/{id}?site=site-id` - get comment by `comment id`
-* `GET /api/v1/comments?site=site-id&user=id&limit=N` - get comment by `user id`, returns `response` object
-  ```go
-  type response struct {
-      Comments []store.Comment  `json:"comments"`
-      Count    int              `json:"count"`
-  }{}
-  ```
-* `GET /api/v1/count?site=site-id&url=post-url` - get comment's count for `{url}`
-* `POST /api/v1/count?site=siteID` - get number of comments for posts from post body (list of post IDs)
-* `GET /api/v1/list?site=site-id&limit=5&skip=2` - list commented posts, returns array or `PostInfo`, limit=0 will return all posts
-  ```go
-  type PostInfo struct {
-      URL   string      `json:"url"`
-      Count int         `json:"count"`
-      ReadOnly bool     `json:"read_only,omitempty"`
-      FirstTS time.Time `json:"first_time,omitempty"`
-      LastTS  time.Time `json:"last_time,omitempty"`
-  }
-  ```
-* `GET /api/v1/user` - get user info, _auth required_
-* `PUT /api/v1/vote/{id}?site=site-id&url=post-url&vote=1` - vote for comment. `vote`=1 will increase score, -1 decrease. _auth required_
-* `GET /api/v1/userdata?site=site-id` - export all user data to gz stream  _auth required_
-* `POST /api/v1/deleteme?site=site-id` - request deletion of user data. _auth required_
-* `GET /api/v1/config?site=site-id` - returns configuration (parameters) for given site
-
-  ```go
-  type Config struct {
-      Version        string   `json:"version"`
-      EditDuration   int      `json:"edit_duration"`
-      MaxCommentSize int      `json:"max_comment_size"`
-      Admins         []string `json:"admins"`
-      AdminEmail     string   `json:"admin_email"`
-      Auth           []string `json:"auth_providers"`
-      LowScore       int      `json:"low_score"`
-      CriticalScore  int      `json:"critical_score"`
-      PositiveScore  bool     `json:"positive_score"`
-      ReadOnlyAge    int      `json:"readonly_age"`
-      MaxImageSize   int      `json:"max_image_size"`
-  }
-  ```
-
-* `GET /api/v1/info?site=site-idd&url=post-ur` - returns `PostInfo` for site and url
-
-### RSS feeds
-
-* `GET /api/v1/rss/post?site=site-id&url=post-url` - rss feed for a post
-* `GET /api/v1/rss/site?site=site-id` - rss feed for given site
-* `GET /api/v1/rss/reply?site=site-id&user=user-id` - rss feed for replies to user's comments
-
-### Images management
-
-* `GET /api/v1/picture/{user}/{id}` - load stored image
-* `POST /api/v1/picture` - upload and store image, uses post form with `FormFile("file")`. returns `{"id": user/imgid}` _auth required_
-
-_returned id should be appended to load image url on caller side_
-
-### Admin
-
-* `DELETE /api/v1/admin/comment/{id}?site=site-id&url=post-url` - delete comment by `id`.
-* `PUT /api/v1/admin/user/{userid}?site=site-id&block=1&ttl=7d` - block or unblock user with optional ttl (default=permanent)
-* `GET api/v1/admin/blocked&site=site-id` - list of blocked user ids
-  ```go
-  type BlockedUser struct {
-      ID        string    `json:"id"`
-      Name      string    `json:"name"`
-      Until     time.Time `json:"time"`
-  }
-  ```
-* `GET /api/v1/admin/export?site=side-id&mode=[stream|file]` - export all comments to json stream or gz file.
-* `POST /api/v1/admin/import?site=side-id` - import comments from the backup, uses post body.
-* `POST /api/v1/admin/import/form?site=side-id` - import comments from the backup, user post form.
-* `GET /api/v1/admin/import/wait?site=side-id` - wait for import completeion.
-* `PUT /api/v1/admin/pin/{id}?site=site-id&url=post-url&pin=1` - pin or unpin comment.
-* `GET /api/v1/admin/user/{userid}?site=site-id` - get user's info.
-* `DELETE /api/v1/admin/user/{userid}?site=site-id` - delete all user's comments.
-* `PUT /api/v1/admin/readonly?site=site-id&url=post-url&ro=1` - set read-only status
-* `PUT /api/v1/admin/verify/{userid}?site=site-id&verified=1` - set verified status
-* `GET /api/v1/admin/deleteme?token=token` - process deleteme user's request
-
-_all admin calls require auth and admin privilege_
-
-## Privacy
-
-* Remark42 is trying to be very sensitive to any private or semi-private information.
-* Authentication requesting the minimal possible scope from authentication providers. All extra information returned by them dropped immediately and not stored in any form.
-* Generally, remark42 keeps user id, username and avatar link only. None of these fields exposed directly - id and name hashed, avatar proxied.
-* There is no tracking of any sort.
-* Login mechanic uses JWT stored in a cookie (httpOnly, secured). The second cookie (XSRF_TOKEN) is a random id preventing CSRF.
-* There is no cross-site login, i.e., user's behavior can't be analyzed across independent sites running remark42.
-* There are no third-party analytic services involved.
-* User can request all information remark42 knows about and export to gz file.
-* Supported complete cleanup of all information related to user's activity.
-* Cookie lifespan can be restricted to session-only.
-* All potentially sensitive data stored by remark42 hashed and encrypted.
-
-## Technical details
-
-* Data stored in [boltdb](https://github.com/coreos/bbolt) (embedded key/value database) files under `STORE_BOLT_PATH`
-* Each site stored in a separate boltbd file.
-* In order to migrate/move remark42 to another host boltbd files as well as avatars directory `AVATAR_FS_PATH` should be transferred. Optionally, boltdb can be used to store avatars as well.
-* Automatic backup process runs every 24h and exports all content in json-like format to `backup-remark-YYYYMMDD.gz`.
-* Authentication implemented with [go-pkgz/auth](https://github.com/go-pkgz/auth) stored in a cookie. It uses HttpOnly, secure cookies.
-* All heavy REST calls cached internally in LRU cache limited by `CACHE_MAX_ITEMS` and `CACHE_MAX_SIZE` with [go-pkgz/rest](https://github.com/go-pkgz/rest)
-* User's activity throttled globally (up to 1000 simultaneous requests) and limited locally (per user, usually up to 10 req/sec)
-* Request timeout set to 60sec
-* Admin authentication (`--admin-password` set) allows to hit remark42 API without social login and with admin privileges. Adds basic-auth for username: `admin`, password: `${ADMIN_PASSWD}`.
-* User can vote for the comment multiple times but only to change the vote. Double-voting not allowed.
-* User can edit comments in 5 mins (configurable) window after creation.
-* User ID hashed and prefixed by oauth provider name to avoid collisions and potential abuse.
-* All avatars resized and cached locally to prevent rate limiters from oauth providers, part of [go-pkgz/auth](https://github.com/go-pkgz/auth) functionality.
-* Images can be proxied (`IMG_PROXY=true`) to prevent mixed http/https.
-* Docker build uses [publicly available](https://github.com/umputun/baseimage) base images.
+* [A Helm chart for Remark42 on Kubernetes](https://github.com/groundhog2k/helm-charts/tree/master/charts/remark42)
+* [django-remark42](https://github.com/andrewp-as-is/django-remark42.py)

SECURITY.md

@@ -0,0 +1,15 @@
+# Security Policy
+
+## Supported Versions
+
+We release patches for security vulnerabilities.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| current | :white_check_mark: |
+| >=1.6.x | :white_check_mark: |
+| <1.5.x  | :x:                |
+
+## Reporting a Vulnerability
+
+Please report (suspected) security vulnerabilities to umputun@gmail.com. You will receive a response from us within 48 hours. If the issue is confirmed, we will release a patch as soon as possible depending on complexity but historically within a few days.

backend/.golangci.yml

@@ -0,0 +1,74 @@
+run:
+  timeout: 5m
+  output:
+    format: tab
+  skip-dirs:
+    - vendor
+
+linters-settings:
+  govet:
+    check-shadowing: true
+  golint:
+    min-confidence: 0.1
+  maligned:
+    suggest-new: true
+  goconst:
+    min-len: 2
+    min-occurrences: 2
+  misspell:
+    locale: US
+  lll:
+    line-length: 140
+  gocritic:
+    enabled-tags:
+      - performance
+      - style
+      - experimental
+    disabled-checks:
+      - wrapperFunc
+# TODO: feel free to remove these excludes and fix the code
+      - hugeParam
+      - rangeValCopy
+
+linters:
+  enable:
+    - bodyclose
+    - megacheck
+    - revive
+    - govet
+    - unconvert
+    - megacheck
+    - structcheck
+    - gas
+    - gocyclo
+    - dupl
+    - misspell
+    - unparam
+    - varcheck
+    - deadcode
+    - typecheck
+    - ineffassign
+    - varcheck
+    - stylecheck
+    - gochecknoinits
+    - exportloopref
+    - gocritic
+    - nakedret
+    - gosimple
+    - prealloc
+  fast: false
+  disable-all: true
+
+issues:
+  exclude-rules:
+    - text: "at least one file in a package should have a package comment"
+      linters:
+        - stylecheck
+    - text: "should have a package comment, unless it's in another file for this package"
+      linters:
+        - golint
+    - path: _test\.go
+      linters:
+        - gosec
+        - dupl
+  exclude-use-default: false

backend/_example/memory_store/Dockerfile

@@ -0,0 +1,19 @@
+FROM umputun/baseimage:buildgo-latest as build-backend
+
+ADD backend /build/backend
+WORKDIR /build/backend/_example/memory_store
+
+RUN go build -o /build/bin/memory_store -ldflags "-X main.revision=0.0.0 -s -w"
+
+
+FROM umputun/baseimage:app-latest
+
+WORKDIR /srv
+COPY --from=build-backend /build/bin/memory_store /srv/memory_store
+RUN chown -R app:app /srv
+
+EXPOSE 8080
+HEALTHCHECK --interval=30s --timeout=3s CMD curl --fail http://localhost:8080/ping || exit 1
+USER app
+
+CMD ["/srv/memory_store"]

backend/_example/memory_store/README.md

@@ -0,0 +1,12 @@
+# sample store implementation
+
+`memory_store` illustrates how to make a custom storage plugin for remark42.
+
+In order to run remark42 with memory_store copy provided `compose-dev-memstore.yml` to the root directory and run:
+
+1. `docker-compose -f compose-dev-memstore.yml build`
+1. `docker-compose -f compose-dev-memstore.yml up`
+
+As usual, demo site will run on http://127.0.0.1:8080/web/
+
+note: in order to work with the latest (current) version of master `go.mod` uses replacement directive for the backend package. In real-life usage `replace github.com/umputun/remark42/backend => ../../`  should not be used. 

backend/_example/memory_store/accessor/admin.go

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2019 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package accessor
+
+import (
+	log "github.com/go-pkgz/lgr"
+	"github.com/pkg/errors"
+
+	"github.com/umputun/remark42/backend/app/store/admin"
+)
+
+// MemAdmin implements admin.Store with memory backend
+type MemAdmin struct {
+	data map[string]AdminRec // admin info per site
+	key  string
+}
+
+// AdminRec is a records per site with all admin info in
+type AdminRec struct {
+	SiteID       string
+	IDs          []string // admin ids
+	Email        string   // admin email
+	Enabled      bool     // site enabled
+	CountCreated int64    // number of created posts
+}
+
+// NewMemAdminStore makes admin Store in memory
+func NewMemAdminStore(key string) *MemAdmin {
+	log.Print("[DEBUG] make memory admin store")
+	return &MemAdmin{data: map[string]AdminRec{}, key: key}
+}
+
+// Key executes find by siteID and returns substructure with secret key
+func (m *MemAdmin) Key(_ string) (key string, err error) {
+	return m.key, nil
+}
+
+// Admins executes find by siteID and returns admins ids
+func (m *MemAdmin) Admins(siteID string) (ids []string, err error) {
+	resp, ok := m.data[siteID]
+	if !ok {
+		return nil, errors.Errorf("site %s not found", siteID)
+	}
+	log.Printf("[DEBUG] admins for %s, %+v", siteID, resp.IDs)
+	return resp.IDs, nil
+}
+
+// Email executes find by siteID and returns admin's email
+func (m *MemAdmin) Email(siteID string) (email string, err error) {
+	resp, ok := m.data[siteID]
+	if !ok {
+		return "", errors.Errorf("site %s not found", siteID)
+	}
+
+	return resp.Email, nil
+}
+
+// Enabled return
+func (m *MemAdmin) Enabled(siteID string) (ok bool, err error) {
+	resp, ok := m.data[siteID]
+	if !ok {
+		return false, errors.Errorf("site %s not found", siteID)
+	}
+	return resp.Enabled, nil
+}
+
+// OnEvent reacts on events from updates, created, delete and vote
+func (m *MemAdmin) OnEvent(siteID string, ev admin.EventType) error {
+	resp, ok := m.data[siteID]
+	if !ok {
+		return errors.Errorf("site %s not found", siteID)
+	}
+	if ev == admin.EvCreate {
+		resp.CountCreated++ // not a good idea, just for demo
+		m.data[siteID] = resp
+	}
+	return nil
+}
+
+// Set admin data for siteID
+func (m *MemAdmin) Set(siteID string, arec AdminRec) {
+	m.data[siteID] = arec
+}

backend/_example/memory_store/accessor/admin_test.go

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2019 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package accessor
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/umputun/remark42/backend/app/store/admin"
+)
+
+func TestMemAdmin_Get(t *testing.T) {
+
+	adm := NewMemAdminStore("secret")
+	var ms admin.Store = adm
+
+	adm.data = map[string]AdminRec{
+		"site1": {"site1", []string{"i11", "i12"}, "e1", true, 0},
+	}
+	adm.Set("site2", AdminRec{"site2", []string{"i21", "i22"}, "e2", true, 0})
+	adm.Set("site3", AdminRec{"site3", []string{"i21", "i22"}, "e3", false, 0})
+
+	admins, err := ms.Admins("site1")
+	assert.NoError(t, err)
+	assert.Equal(t, []string{"i11", "i12"}, admins)
+	email, err := ms.Email("site1")
+	assert.NoError(t, err)
+	assert.Equal(t, "e1", email)
+	key, err := ms.Key("any")
+	assert.NoError(t, err)
+	assert.Equal(t, "secret", key)
+
+	admins, err = ms.Admins("site2")
+	assert.NoError(t, err)
+	assert.Equal(t, []string{"i21", "i22"}, admins)
+	email, err = ms.Email("site2")
+	assert.NoError(t, err)
+	assert.Equal(t, "e2", email)
+	key, err = ms.Key("any")
+	assert.NoError(t, err)
+	assert.Equal(t, "secret", key)
+
+	admins, err = ms.Admins("no-site-in-db")
+	assert.EqualError(t, err, "site no-site-in-db not found")
+	assert.Empty(t, admins)
+
+	email, err = ms.Email("no-site-in-db")
+	assert.EqualError(t, err, "site no-site-in-db not found")
+	assert.Empty(t, email)
+
+	enabled, err := ms.Enabled("site1")
+	assert.NoError(t, err)
+	assert.True(t, enabled)
+
+	enabled, err = ms.Enabled("site3")
+	assert.NoError(t, err)
+	assert.False(t, enabled)
+
+	enabled, err = ms.Enabled("no-site-in-db")
+	assert.EqualError(t, err, "site no-site-in-db not found")
+	assert.False(t, enabled)
+
+	err = ms.OnEvent("site1", admin.EvCreate)
+	assert.NoError(t, err)
+
+	err = ms.OnEvent("no-site-in-db", admin.EvCreate)
+	assert.Error(t, err)
+}

backend/_example/memory_store/accessor/data.go

@@ -0,0 +1,571 @@
+/*
+ * Copyright 2019 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package accessor
+
+import (
+	"log"
+	"sort"
+	"sync"
+	"time"
+
+	"github.com/pkg/errors"
+
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/engine"
+)
+
+const lastLimit = 1000
+
+// MemData implements in-memory data store
+type MemData struct {
+	posts     map[string][]store.Comment // key is siteID
+	metaUsers map[string]metaUser        // key is userID
+	metaPosts map[store.Locator]metaPost // key is post's locator
+	mu        sync.RWMutex
+}
+
+type metaPost struct {
+	PostURL  string
+	SiteID   string
+	ReadOnly bool
+}
+
+type metaUser struct {
+	UserID       string
+	SiteID       string
+	Verified     bool
+	Blocked      bool
+	BlockedUntil time.Time
+	Details      engine.UserDetailEntry
+}
+
+// NewMemData makes in-memory engine.
+func NewMemData() *MemData {
+
+	result := &MemData{
+		posts:     map[string][]store.Comment{},
+		metaUsers: map[string]metaUser{},
+		metaPosts: map[store.Locator]metaPost{},
+	}
+	return result
+}
+
+// Create new comment
+func (m *MemData) Create(comment store.Comment) (commentID string, err error) {
+
+	if ro, e := m.Flag(engine.FlagRequest{Flag: engine.ReadOnly, Locator: comment.Locator}); e == nil && ro {
+		return "", errors.Errorf("post %s is read-only", comment.Locator.URL)
+	}
+
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	comments := m.posts[comment.Locator.SiteID]
+	for _, c := range comments { // don't allow duplicated IDs
+		if c.ID == comment.ID {
+			return "", errors.New("dup key")
+		}
+	}
+	comments = append(comments, comment)
+	m.posts[comment.Locator.SiteID] = comments
+	return comment.ID, nil
+}
+
+// Find returns all comments for post and sorts results
+func (m *MemData) Find(req engine.FindRequest) (comments []store.Comment, err error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	comments = []store.Comment{}
+
+	if req.Sort == "" {
+		req.Sort = "time"
+	}
+
+	switch {
+
+	case req.Locator.SiteID != "" && req.Locator.URL != "": // find comments for site and url
+		comments = m.match(m.posts[req.Locator.SiteID], func(c store.Comment) bool {
+			return c.Locator == req.Locator && (req.Since.IsZero() || c.Timestamp.After(req.Since))
+		})
+
+	case req.Locator.SiteID != "" && req.Locator.URL == "" && req.UserID == "": // find last comments for site
+		if req.Limit > lastLimit || req.Limit == 0 {
+			req.Limit = lastLimit
+		}
+		if req.Since.IsZero() {
+			req.Since = time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC)
+		}
+
+		comments = m.match(m.posts[req.Locator.SiteID], func(c store.Comment) bool {
+			return !c.Deleted && c.Timestamp.After(req.Since)
+		})
+		comments = engine.SortComments(comments, "-time")
+		if len(comments) > req.Limit {
+			comments = comments[:req.Limit]
+		}
+		return comments, nil
+
+	case req.Locator.SiteID != "" && req.UserID != "": // find comments for user
+		comments = m.match(m.posts[req.Locator.SiteID], func(c store.Comment) bool {
+			return c.User.ID == req.UserID
+		})
+	}
+
+	comments = engine.SortComments(comments, req.Sort)
+	if req.Skip > 0 && req.Skip > len(comments) {
+		return []store.Comment{}, nil
+	}
+	if req.Skip > 0 && req.Skip < len(comments) {
+		comments = comments[req.Skip:]
+	}
+
+	if req.Limit > 0 && req.Limit < len(comments) {
+		comments = comments[:req.Limit]
+	}
+
+	return comments, err
+}
+
+// Get returns comment for locator.URL and commentID string
+func (m *MemData) Get(req engine.GetRequest) (comment store.Comment, err error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+	return m.get(req.Locator, req.CommentID)
+}
+
+// Update updates comment for locator.URL with mutable part of comment
+func (m *MemData) Update(comment store.Comment) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	return m.updateComment(comment)
+}
+
+// Count returns number of comments for post or user
+func (m *MemData) Count(req engine.FindRequest) (count int, err error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	switch {
+	case req.Locator.URL != "": // comment's count for post
+		comments := m.match(m.posts[req.Locator.SiteID], func(c store.Comment) bool {
+			return c.Locator == req.Locator && !c.Deleted
+		})
+		return len(comments), nil
+	case req.UserID != "":
+		comments := m.match(m.posts[req.Locator.SiteID], func(c store.Comment) bool {
+			return c.User.ID == req.UserID && !c.Deleted
+		})
+		return len(comments), nil
+	default:
+		return 0, errors.Errorf("invalid count request %+v", req)
+	}
+}
+
+// Info get post(s) meta info
+func (m *MemData) Info(req engine.InfoRequest) (res []store.PostInfo, err error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+	res = []store.PostInfo{}
+
+	if req.Locator.URL != "" { // post info
+		comments := m.match(m.posts[req.Locator.SiteID], func(c store.Comment) bool {
+			return c.Locator == req.Locator
+		})
+		if len(comments) == 0 {
+			return nil, errors.New("not found")
+		}
+		info := store.PostInfo{
+			URL:      req.Locator.URL,
+			Count:    len(comments),
+			ReadOnly: false,
+			FirstTS:  comments[0].Timestamp.UTC(),
+			LastTS:   comments[len(comments)-1].Timestamp.UTC(),
+		}
+		// set read-only from age and manual bucket
+		info.ReadOnly = req.ReadOnlyAge > 0 && !info.FirstTS.IsZero() &&
+			info.FirstTS.AddDate(0, 0, req.ReadOnlyAge).Before(time.Now())
+		if !info.ReadOnly {
+			v := m.checkFlag(engine.FlagRequest{Flag: engine.ReadOnly, Locator: req.Locator})
+			info.ReadOnly = v
+		}
+		return []store.PostInfo{info}, nil
+	}
+
+	if req.Locator.URL == "" && req.Locator.SiteID != "" { // site info (list)
+		if req.Limit <= 0 {
+			req.Limit = 1000
+		}
+		if req.Skip < 0 {
+			req.Skip = 0
+		}
+
+		infoAll := map[store.Locator]store.PostInfo{}
+		for _, c := range m.posts[req.Locator.SiteID] {
+			var info store.PostInfo
+			var ok bool
+			if info, ok = infoAll[c.Locator]; !ok {
+				info = store.PostInfo{URL: c.Locator.URL, FirstTS: c.Timestamp.UTC()}
+			}
+			info.Count++
+			info.LastTS = c.Timestamp.UTC()
+			infoAll[c.Locator] = info
+		}
+
+		for _, v := range infoAll {
+			res = append(res, v)
+		}
+		sort.Slice(res, func(i, j int) bool {
+			return res[i].URL > res[j].URL
+		})
+
+		if req.Skip > 0 {
+			if req.Skip >= len(res) {
+				return []store.PostInfo{}, nil
+			}
+			res = res[req.Skip:]
+		}
+
+		if req.Limit > 0 && req.Limit < len(res) {
+			res = res[:req.Limit]
+		}
+		return res, nil
+	}
+
+	return nil, errors.Errorf("invalid info request %+v", req)
+}
+
+// Flag sets and gets flag values
+func (m *MemData) Flag(req engine.FlagRequest) (val bool, err error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if req.Update == engine.FlagNonSet { // read flag value, no update requested
+		return m.checkFlag(req), nil
+	}
+	// write flag value
+	return m.setFlag(req)
+}
+
+// ListFlags get list of flagged keys, like blocked & verified user
+// works for full locator (post flags) or with userID
+func (m *MemData) ListFlags(req engine.FlagRequest) (res []interface{}, err error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	res = []interface{}{}
+
+	switch req.Flag {
+	case engine.Verified:
+		for _, u := range m.metaUsers {
+			if u.SiteID == req.Locator.SiteID {
+				res = append(res, u.UserID)
+			}
+		}
+		return res, nil
+
+	case engine.Blocked:
+		log.Printf("%+v", m.metaUsers)
+		for _, u := range m.metaUsers {
+			if u.SiteID == req.Locator.SiteID && u.Blocked && u.BlockedUntil.After(time.Now()) {
+				res = append(res, store.BlockedUser{ID: u.UserID, Until: u.BlockedUntil})
+			}
+		}
+		return res, nil
+	}
+
+	return nil, errors.Errorf("flag %s not listable", req.Flag)
+}
+
+// UserDetail sets or gets single detail value, or gets all details fo§r requested site.
+// UserDetail returns list even for single entry request is a compromise in order to have both single detail getting and setting
+// and all site's details listing under the same function (and not to extend engine interface by two separate functions).
+func (m *MemData) UserDetail(req engine.UserDetailRequest) ([]engine.UserDetailEntry, error) {
+	switch req.Detail {
+	case engine.UserEmail, engine.UserTelegram:
+		if req.UserID == "" {
+			return nil, errors.New("userid cannot be empty in request for single detail")
+		}
+
+		m.mu.Lock()
+		defer m.mu.Unlock()
+
+		if req.Update == "" { // read detail value, no update requested
+			return m.getUserDetail(req)
+		}
+
+		return m.setUserDetail(req)
+	case engine.AllUserDetails:
+		// list of all details returned in case request is a read request
+		// (Update is not set) and does not have UserID or Detail set
+		if req.Update == "" && req.UserID == "" { // read list of all details
+			m.mu.Lock()
+			defer m.mu.Unlock()
+			return m.listDetails(req.Locator)
+		}
+		return nil, errors.New("unsupported request with userdetail all")
+	default:
+		return nil, errors.Errorf("unsupported detail %q", req.Detail)
+	}
+}
+
+// Delete post(s), user, comment, user details, or everything
+func (m *MemData) Delete(req engine.DeleteRequest) error {
+
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	switch {
+	case req.UserDetail != "": // delete user detail
+		return m.deleteUserDetail(req.Locator, req.UserID, req.UserDetail)
+	case req.Locator.URL != "" && req.CommentID != "" && req.UserDetail == "": // delete comment
+		return m.deleteComment(req.Locator, req.CommentID, req.DeleteMode)
+
+	case req.Locator.SiteID != "" && req.UserID != "" && req.CommentID == "" && req.UserDetail == "": // delete user
+		comments := m.match(m.posts[req.Locator.SiteID], func(c store.Comment) bool {
+			return c.User.ID == req.UserID && !c.Deleted
+		})
+		for _, c := range comments {
+			if e := m.deleteComment(c.Locator, c.ID, req.DeleteMode); e != nil {
+				return e
+			}
+		}
+		return m.deleteUserDetail(req.Locator, req.UserID, engine.AllUserDetails)
+
+	case req.Locator.SiteID != "" && req.Locator.URL == "" && req.CommentID == "" && req.UserID == "" && req.UserDetail == "": // delete site
+		if _, ok := m.posts[req.Locator.SiteID]; !ok {
+			return errors.New("not found")
+		}
+		m.posts[req.Locator.SiteID] = []store.Comment{}
+		return nil
+	}
+
+	return errors.Errorf("invalid delete request %+v", req)
+}
+
+func (m *MemData) deleteComment(loc store.Locator, id string, mode store.DeleteMode) error {
+
+	comments := m.match(m.posts[loc.SiteID], func(c store.Comment) bool {
+		return c.Locator == loc && c.ID == id
+	})
+	if len(comments) == 0 {
+		return errors.New("not found")
+	}
+
+	comments[0].SetDeleted(mode)
+	return m.updateComment(comments[0])
+}
+
+// Close store
+func (m *MemData) Close() error {
+	return nil
+}
+
+func (m *MemData) checkFlag(req engine.FlagRequest) (val bool) {
+	switch req.Flag {
+	case engine.Blocked:
+		if meta, ok := m.metaUsers[req.UserID]; ok {
+			if meta.SiteID != req.Locator.SiteID {
+				return false
+			}
+			return meta.Blocked && meta.BlockedUntil.After(time.Now())
+		}
+	case engine.Verified:
+		if meta, ok := m.metaUsers[req.UserID]; ok {
+			if meta.SiteID != req.Locator.SiteID {
+				return false
+			}
+			return meta.Verified
+		}
+	case engine.ReadOnly:
+		if meta, ok := m.metaPosts[req.Locator]; ok {
+			return meta.ReadOnly
+		}
+	}
+	return false
+}
+
+func (m *MemData) setFlag(req engine.FlagRequest) (res bool, err error) {
+
+	status := false
+	if req.Update == engine.FlagTrue {
+		status = true
+	}
+
+	switch req.Flag {
+
+	case engine.Blocked:
+		until := time.Time{}
+		if status {
+			until = time.Now().AddDate(100, 0, 0) // permanent is 100years
+			if req.TTL > 0 {
+				until = time.Now().Add(req.TTL)
+			}
+		}
+		meta := metaUser{
+			UserID:       req.UserID,
+			SiteID:       req.Locator.SiteID,
+			Blocked:      status,
+			BlockedUntil: until,
+		}
+		m.metaUsers[req.UserID] = meta
+
+	case engine.Verified:
+		meta := metaUser{
+			UserID:   req.UserID,
+			SiteID:   req.Locator.SiteID,
+			Verified: status,
+		}
+		m.metaUsers[req.UserID] = meta
+
+	case engine.ReadOnly:
+		info, ok := m.metaPosts[req.Locator]
+		if !ok {
+			info.SiteID = req.Locator.SiteID
+			info.PostURL = req.Locator.URL
+		}
+		info.ReadOnly = status
+		m.metaPosts[req.Locator] = info
+	}
+	return status, errors.Wrapf(err, "failed to set flag %+v", req)
+}
+
+// getUserDetail returns UserDetailEntry with requested userDetail (omitting other details)
+// as an only element of the slice.
+func (m *MemData) getUserDetail(req engine.UserDetailRequest) ([]engine.UserDetailEntry, error) {
+	if meta, ok := m.metaUsers[req.UserID]; ok {
+		if meta.SiteID != req.Locator.SiteID {
+			return []engine.UserDetailEntry{}, nil
+		}
+		switch req.Detail {
+		case engine.UserEmail:
+			return []engine.UserDetailEntry{{UserID: req.UserID, Email: meta.Details.Email}}, nil
+		case engine.UserTelegram:
+			return []engine.UserDetailEntry{{UserID: req.UserID, Telegram: meta.Details.Telegram}}, nil
+		}
+	}
+
+	return []engine.UserDetailEntry{}, nil
+}
+
+// setUserDetail sets requested userDetail, returning complete updated UserDetailEntry as an onlyIps
+// element of the slice in case of success
+func (m *MemData) setUserDetail(req engine.UserDetailRequest) ([]engine.UserDetailEntry, error) {
+	var entry metaUser
+	if meta, ok := m.metaUsers[req.UserID]; ok {
+		if meta.SiteID != req.Locator.SiteID {
+			return []engine.UserDetailEntry{}, nil
+		}
+		entry = meta
+	}
+
+	if entry == (metaUser{}) {
+		entry = metaUser{
+			UserID:  req.UserID,
+			SiteID:  req.Locator.SiteID,
+			Details: engine.UserDetailEntry{UserID: req.UserID},
+		}
+	}
+
+	switch req.Detail {
+	case engine.UserEmail:
+		entry.Details.Email = req.Update
+		m.metaUsers[req.UserID] = entry
+		return []engine.UserDetailEntry{{UserID: req.UserID, Email: req.Update}}, nil
+	case engine.UserTelegram:
+		entry.Details.Telegram = req.Update
+		m.metaUsers[req.UserID] = entry
+		return []engine.UserDetailEntry{{UserID: req.UserID, Telegram: req.Update}}, nil
+	}
+
+	return []engine.UserDetailEntry{}, nil
+}
+
+// listDetails lists all available users details for given siteID
+func (m *MemData) listDetails(loc store.Locator) ([]engine.UserDetailEntry, error) {
+	var res []engine.UserDetailEntry
+	for _, u := range m.metaUsers {
+		if u.SiteID == loc.SiteID {
+			res = append(res, u.Details)
+		}
+	}
+	return res, nil
+}
+
+// deleteUserDetail deletes requested UserDetail or whole UserDetailEntry,
+// deletion of the absent entry doesn't produce error.
+// Trying to delete user with wrong siteID doesn't to anything and doesn't produce error.
+func (m *MemData) deleteUserDetail(locator store.Locator, userID string, userDetail engine.UserDetail) error {
+	var entry metaUser
+	if meta, ok := m.metaUsers[userID]; ok {
+		if meta.SiteID != locator.SiteID {
+			return nil
+		}
+		entry = meta
+	}
+
+	if entry == (metaUser{}) || entry.Details == (engine.UserDetailEntry{}) {
+		// absent entry means that we should not do anything
+		return nil
+	}
+
+	switch userDetail {
+	case engine.UserEmail:
+		entry.Details.Email = ""
+	case engine.UserTelegram:
+		entry.Details.Telegram = ""
+	case engine.AllUserDetails:
+		entry.Details = engine.UserDetailEntry{UserID: userID}
+	}
+
+	if entry.Details == (engine.UserDetailEntry{UserID: userID}) {
+		// no user details are stored, empty details entry altogether
+		entry.Details = engine.UserDetailEntry{}
+	}
+
+	m.metaUsers[userID] = entry
+	return nil
+}
+
+func (m *MemData) get(loc store.Locator, commentID string) (store.Comment, error) {
+	comments := m.match(m.posts[loc.SiteID], func(c store.Comment) bool {
+		return c.Locator == loc && c.ID == commentID
+	})
+	if len(comments) == 0 {
+		return store.Comment{}, errors.New("not found")
+	}
+	return comments[0], nil
+}
+
+func (m *MemData) updateComment(comment store.Comment) error {
+	comments := m.posts[comment.Locator.SiteID]
+	for i, c := range comments {
+		if c.ID != comment.ID || c.Locator != comment.Locator {
+			continue
+		}
+		c.Text = comment.Text
+		c.Orig = comment.Orig
+		c.Score = comment.Score
+		c.Votes = comment.Votes
+		c.Pin = comment.Pin
+		c.Deleted = comment.Deleted
+		c.User = comment.User
+		comments[i] = c
+		m.posts[comment.Locator.SiteID] = comments
+		return nil
+	}
+	return errors.New("not found")
+}
+
+func (m *MemData) match(comments []store.Comment, fn func(c store.Comment) bool) (res []store.Comment) {
+	res = []store.Comment{}
+	for _, c := range comments {
+		if fn(c) {
+			res = append(res, c)
+		}
+	}
+	return res
+}

backend/_example/memory_store/accessor/data_test.go

@@ -0,0 +1,819 @@
+/*
+ * Copyright 2019 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package accessor
+
+import (
+	"fmt"
+	"sort"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/engine"
+)
+
+func TestMemData_CreateAndFind(t *testing.T) {
+	m := prepMem(t) // adds two comments
+
+	req := engine.FindRequest{Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, Sort: "time"}
+	res, err := m.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(res))
+	assert.Equal(t, `some text, <a href="http://radio-t.com">link</a>`, res[0].Text)
+	assert.Equal(t, "user1", res[0].User.ID)
+
+	_, err = m.Create(store.Comment{ID: res[0].ID, Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "dup key")
+
+	id, err := m.Create(store.Comment{ID: "id-3", Locator: store.Locator{URL: "https://radio-t2.com", SiteID: "radio-t2"}})
+	require.NoError(t, err)
+	assert.Equal(t, "id-3", id)
+	req = engine.FindRequest{Locator: store.Locator{URL: "https://radio-t2.com", SiteID: "radio-t2"}, Sort: "time"}
+	res, err = m.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 1, len(res))
+}
+
+func TestMemData_CreateFailedReadOnly(t *testing.T) {
+	b := prepMem(t)
+	comment := store.Comment{
+		ID:        "id-ro",
+		Text:      `some text, <a href="http://radio-t.com">link</a>`,
+		Timestamp: time.Date(2017, 12, 20, 15, 18, 22, 0, time.Local),
+		Locator:   store.Locator{URL: "https://radio-t.com/ro", SiteID: "radio-t"},
+		User:      store.User{ID: "user1", Name: "user name"},
+	}
+
+	flagReq := engine.FlagRequest{Locator: comment.Locator, Flag: engine.ReadOnly, Update: engine.FlagTrue}
+	v, err := b.Flag(flagReq)
+	require.NoError(t, err)
+	assert.Equal(t, true, v)
+
+	_, err = b.Create(comment)
+	assert.Error(t, err)
+	assert.Equal(t, "post https://radio-t.com/ro is read-only", err.Error())
+
+	flagReq = engine.FlagRequest{Locator: comment.Locator, Flag: engine.ReadOnly, Update: engine.FlagFalse}
+	v, err = b.Flag(flagReq)
+	require.NoError(t, err)
+	assert.Equal(t, false, v)
+
+	_, err = b.Create(comment)
+	assert.NoError(t, err)
+}
+
+func TestMemData_Get(t *testing.T) {
+	b := prepMem(t)
+	req := engine.FindRequest{Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, Sort: "time"}
+	res, err := b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(res), "2 records initially")
+
+	comment, err := b.Get(getReq(store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, res[1].ID))
+	assert.NoError(t, err)
+	assert.Equal(t, "some text2", comment.Text)
+
+	_, err = b.Get(getReq(store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, "1234567"))
+	assert.EqualError(t, err, `not found`)
+
+	_, err = b.Get(getReq(store.Locator{URL: "https://radio-t.com", SiteID: "bad"}, res[1].ID))
+	assert.EqualError(t, err, `not found`)
+}
+
+func TestMemData_Update(t *testing.T) {
+	b := prepMem(t)
+	req := engine.FindRequest{Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, Sort: "time"}
+	res, err := b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(res), "2 records initially")
+
+	comment := res[0]
+	comment.Text = "abc 123"
+	comment.Score = 100
+	err = b.Update(comment)
+	assert.NoError(t, err)
+
+	comment, err = b.Get(getReq(store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, res[0].ID))
+	assert.NoError(t, err)
+	assert.Equal(t, "abc 123", comment.Text)
+	assert.Equal(t, res[0].ID, comment.ID)
+	assert.Equal(t, 100, comment.Score)
+
+	comment.Locator.SiteID = "bad"
+	err = b.Update(comment)
+	assert.EqualError(t, err, `not found`)
+
+	comment.Locator.SiteID = "https://radio-t.com"
+	comment.Locator.URL = "https://radio-t.com-bad"
+	err = b.Update(comment)
+	assert.EqualError(t, err, `not found`)
+}
+
+func TestMemData_FindLast(t *testing.T) {
+	b := prepMem(t)
+	req := engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, Sort: "-time"}
+	res, err := b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(res))
+	assert.Equal(t, "some text2", res[0].Text)
+
+	req.Limit = 1
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 1, len(res))
+	assert.Equal(t, "some text2", res[0].Text)
+
+	req.Locator.SiteID = "bad"
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(res))
+}
+
+func TestMemData_FindLastSince(t *testing.T) {
+	b := prepMem(t)
+	ts := time.Date(2017, 12, 20, 15, 18, 21, 0, time.Local)
+	req := engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, Sort: "-time", Since: ts}
+	res, err := b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(res))
+	assert.Equal(t, "some text2", res[0].Text)
+
+	req.Since = time.Date(2017, 12, 20, 15, 18, 22, 0, time.Local)
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 1, len(res))
+	assert.Equal(t, "some text2", res[0].Text)
+
+	req.Since = time.Date(2017, 12, 20, 16, 18, 22, 0, time.Local)
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(res))
+}
+
+func TestMemData_FindForUser(t *testing.T) {
+	b := prepMem(t)
+	req := engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, Sort: "-time", UserID: "user1", Limit: 5}
+	res, err := b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(res))
+	assert.Equal(t, "some text2", res[0].Text, "sorted by -time")
+
+	req = engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, Sort: "-time", UserID: "user1", Limit: 1}
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 1, len(res), "allow 1 comment")
+	assert.Equal(t, "some text2", res[0].Text, "sorted by -time")
+
+	req = engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, Sort: "-time", UserID: "user1", Limit: 1, Skip: 1}
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 1, len(res), "allow 1 comment")
+	assert.Equal(t, `some text, <a href="http://radio-t.com">link</a>`, res[0].Text, "second comment")
+
+	req = engine.FindRequest{Locator: store.Locator{SiteID: "bad"}, Sort: "-time", UserID: "user1", Limit: 1, Skip: 1}
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(res), "no comments")
+
+	req = engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, Sort: "-time", UserID: "userZ", Limit: 1, Skip: 1}
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(res), "no comments")
+}
+
+func TestMemData_FindForUserPagination(t *testing.T) {
+	b := NewMemData()
+
+	c := store.Comment{
+		Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"},
+		User:    store.User{ID: "user1", Name: "user name"},
+	}
+
+	// write 200 comments
+	for i := 0; i < 200; i++ {
+		c.ID = fmt.Sprintf("idd-%d", i)
+		c.Text = fmt.Sprintf("text #%d", i)
+		c.Timestamp = time.Date(2017, 12, 20, 15, 18, i, 0, time.Local)
+		_, err := b.Create(c)
+		require.NoError(t, err)
+	}
+
+	// get all comments
+	req := engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, Sort: "-time", UserID: "user1"}
+	res, err := b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 200, len(res))
+	assert.Equal(t, "idd-199", res[0].ID)
+
+	// seek 0, 5 comments
+	req.Limit = 5
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 5, len(res))
+	assert.Equal(t, "idd-199", res[0].ID)
+	assert.Equal(t, "idd-195", res[4].ID)
+
+	// seek 10, 3 comments
+	req.Skip, req.Limit = 10, 3
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 3, len(res))
+	assert.Equal(t, "idd-189", res[0].ID)
+	assert.Equal(t, "idd-187", res[2].ID)
+
+	// seek 195, ask 10 comments
+	req.Skip, req.Limit = 195, 10
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	require.Equal(t, 5, len(res))
+	assert.Equal(t, "idd-4", res[0].ID)
+	assert.Equal(t, "idd-0", res[4].ID)
+
+	// seek 255, ask 10 comments
+	req.Skip, req.Limit = 255, 10
+	res, err = b.Find(req)
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(res))
+}
+
+func TestMemData_CountPost(t *testing.T) {
+	b := prepMem(t)
+	req := engine.FindRequest{Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}}
+	c, err := b.Count(req)
+	assert.NoError(t, err)
+	require.Equal(t, 2, c)
+
+	req = engine.FindRequest{Locator: store.Locator{URL: "https://radio-t.com-xxx", SiteID: "radio-t"}}
+	c, err = b.Count(req)
+	assert.NoError(t, err)
+	assert.Equal(t, 0, c)
+
+	req = engine.FindRequest{Locator: store.Locator{URL: "https://radio-t.com", SiteID: "bad"}}
+	c, err = b.Count(req)
+	assert.NoError(t, err)
+	assert.Equal(t, 0, c)
+
+	c, err = b.Count(engine.FindRequest{})
+	assert.Error(t, err)
+	assert.Equal(t, 0, c)
+}
+
+func TestMemData_CountUser(t *testing.T) {
+	b := prepMem(t)
+	req := engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1"}
+	c, err := b.Count(req)
+	assert.NoError(t, err)
+	require.Equal(t, 2, c)
+
+	req = engine.FindRequest{Locator: store.Locator{SiteID: "bad"}, UserID: "user1"}
+	c, err = b.Count(req)
+	assert.NoError(t, err)
+	assert.Equal(t, 0, c)
+
+	req = engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, UserID: "userZ"}
+	c, err = b.Count(req)
+	assert.NoError(t, err)
+	assert.Equal(t, 0, c)
+}
+
+func TestMemData_InfoPost(t *testing.T) {
+	b := prepMem(t)
+	ts := func(min int) time.Time { return time.Date(2017, 12, 20, 15, 18, min, 0, time.Local).In(time.UTC) }
+
+	// add one more for https://radio-t.com/2
+	comment := store.Comment{
+		ID:        "12345",
+		Text:      `some text, <a href="http://radio-t.com">link</a>`,
+		Timestamp: time.Date(2017, 12, 20, 15, 18, 24, 0, time.Local),
+		Locator:   store.Locator{URL: "https://radio-t.com/2", SiteID: "radio-t"},
+		User:      store.User{ID: "user1", Name: "user name"},
+	}
+	_, err := b.Create(comment)
+	assert.NoError(t, err)
+
+	req := engine.InfoRequest{Locator: store.Locator{URL: "https://radio-t.com/2", SiteID: "radio-t"}, ReadOnlyAge: 0}
+	r, err := b.Info(req)
+	require.NoError(t, err)
+	assert.Equal(t, []store.PostInfo{{URL: "https://radio-t.com/2", Count: 1, FirstTS: ts(24), LastTS: ts(24)}}, r)
+
+	req = engine.InfoRequest{Locator: store.Locator{URL: "https://radio-t.com/2", SiteID: "radio-t"}, ReadOnlyAge: 10}
+	r, err = b.Info(req)
+	require.NoError(t, err)
+	assert.Equal(t, []store.PostInfo{{URL: "https://radio-t.com/2", Count: 1,
+		FirstTS: ts(24), LastTS: ts(24), ReadOnly: true}}, r)
+
+	req = engine.InfoRequest{Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, ReadOnlyAge: 0}
+	r, err = b.Info(req)
+	require.NoError(t, err)
+	assert.Equal(t, []store.PostInfo{{URL: "https://radio-t.com", Count: 2, FirstTS: ts(22), LastTS: ts(23)}}, r)
+
+	req = engine.InfoRequest{Locator: store.Locator{URL: "https://radio-t.com/error", SiteID: "radio-t"}, ReadOnlyAge: 0}
+	_, err = b.Info(req)
+	require.Error(t, err)
+
+	req = engine.InfoRequest{Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t-error"}, ReadOnlyAge: 0}
+	_, err = b.Info(req)
+	require.Error(t, err)
+
+	_, err = b.Info(engine.InfoRequest{})
+	require.Error(t, err)
+
+	fr := engine.FlagRequest{Flag: engine.ReadOnly,
+		Locator: store.Locator{URL: "https://radio-t.com/2", SiteID: "radio-t"}, Update: engine.FlagTrue}
+	_, err = b.Flag(fr)
+	require.NoError(t, err)
+	req = engine.InfoRequest{Locator: store.Locator{URL: "https://radio-t.com/2", SiteID: "radio-t"}, ReadOnlyAge: 0}
+	r, err = b.Info(req)
+	require.NoError(t, err)
+	assert.Equal(t, []store.PostInfo{{URL: "https://radio-t.com/2", Count: 1, FirstTS: ts(24), LastTS: ts(24),
+		ReadOnly: true}}, r)
+}
+
+func TestMemData_InfoList(t *testing.T) {
+	b := prepMem(t)
+	// add one more for https://radio-t.com/2
+	comment := store.Comment{
+		ID:        "12345",
+		Text:      `some text, <a href="http://radio-t.com">link</a>`,
+		Timestamp: time.Date(2017, 12, 20, 15, 18, 22, 0, time.Local),
+		Locator:   store.Locator{URL: "https://radio-t.com/2", SiteID: "radio-t"},
+		User:      store.User{ID: "user1", Name: "user name"},
+	}
+	_, err := b.Create(comment)
+	assert.NoError(t, err)
+
+	ts := func(sec int) time.Time { return time.Date(2017, 12, 20, 15, 18, sec, 0, time.Local).In(time.UTC) }
+
+	req := engine.InfoRequest{Locator: store.Locator{SiteID: "radio-t"}}
+	res, err := b.Info(req)
+	assert.NoError(t, err)
+	assert.EqualValues(t, []store.PostInfo{{URL: "https://radio-t.com/2", Count: 1, FirstTS: ts(22), LastTS: ts(22)},
+		{URL: "https://radio-t.com", Count: 2, FirstTS: ts(22), LastTS: ts(23)}}, res)
+
+	req = engine.InfoRequest{Locator: store.Locator{SiteID: "radio-t"}, Limit: -1, Skip: -1}
+	res, err = b.Info(req)
+	assert.NoError(t, err)
+	assert.EqualValues(t, []store.PostInfo{{URL: "https://radio-t.com/2", Count: 1, FirstTS: ts(22), LastTS: ts(22)},
+		{URL: "https://radio-t.com", Count: 2, FirstTS: ts(22), LastTS: ts(23)}}, res)
+
+	req = engine.InfoRequest{Locator: store.Locator{SiteID: "radio-t"}, Limit: 1}
+	res, err = b.Info(req)
+	assert.NoError(t, err)
+	assert.Equal(t, []store.PostInfo{{URL: "https://radio-t.com/2", Count: 1, FirstTS: ts(22), LastTS: ts(22)}}, res)
+
+	req = engine.InfoRequest{Locator: store.Locator{SiteID: "radio-t"}, Limit: 1, Skip: 1}
+	res, err = b.Info(req)
+	assert.NoError(t, err)
+	assert.Equal(t, []store.PostInfo{{URL: "https://radio-t.com", Count: 2, FirstTS: ts(22), LastTS: ts(23)}}, res)
+
+	req = engine.InfoRequest{Locator: store.Locator{SiteID: "bad"}, Limit: 1, Skip: 1}
+	res, err = b.Info(req)
+	assert.NoError(t, err)
+	assert.Equal(t, []store.PostInfo{}, res)
+}
+
+func TestMemData_FlagBlockedUser(t *testing.T) {
+
+	b := prepMem(t)
+	req := engine.FlagRequest{Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1"}
+	val, err := b.Flag(req)
+	assert.NoError(t, err)
+	assert.False(t, val, "nothing blocked yet")
+
+	req = engine.FlagRequest{Flag: engine.Blocked, Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1",
+		Update: engine.FlagTrue}
+	_, err = b.Flag(req)
+	assert.NoError(t, err)
+	val, err = b.Flag(engine.FlagRequest{Flag: engine.Blocked, Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1"})
+	assert.NoError(t, err)
+	assert.True(t, val, "user1 blocked")
+
+	req = engine.FlagRequest{Flag: engine.Blocked, Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1",
+		Update: engine.FlagTrue}
+	_, err = b.Flag(req)
+	assert.NoError(t, err)
+	val, err = b.Flag(engine.FlagRequest{Flag: engine.Blocked, Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1"})
+	assert.NoError(t, err)
+	assert.True(t, val, "user1 still blocked")
+
+	req = engine.FlagRequest{Flag: engine.Blocked, Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1",
+		Update: engine.FlagFalse}
+	_, err = b.Flag(req)
+	assert.NoError(t, err)
+	val, err = b.Flag(engine.FlagRequest{Flag: engine.Blocked, Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1"})
+	assert.NoError(t, err)
+	assert.False(t, val, "user1 unblocked")
+}
+
+func TestMemData_FlagReadOnlyPost(t *testing.T) {
+
+	b := prepMem(t)
+	req := engine.FlagRequest{Locator: store.Locator{SiteID: "radio-t", URL: "url-1"}, Flag: engine.ReadOnly}
+	val, err := b.Flag(req)
+	assert.NoError(t, err)
+	assert.False(t, val, "nothing ro")
+
+	req = engine.FlagRequest{Locator: store.Locator{SiteID: "radio-t", URL: "url-1"}, Flag: engine.ReadOnly,
+		Update: engine.FlagTrue}
+	val, err = b.Flag(req)
+	assert.NoError(t, err)
+	assert.True(t, val)
+	req = engine.FlagRequest{Locator: store.Locator{SiteID: "radio-t", URL: "url-1"}, Flag: engine.ReadOnly}
+	val, err = b.Flag(req)
+	assert.NoError(t, err)
+	assert.True(t, val, "url-1 ro")
+
+	req = engine.FlagRequest{Locator: store.Locator{SiteID: "radio-t", URL: "url-2"}, Flag: engine.ReadOnly}
+	val, err = b.Flag(req)
+	assert.NoError(t, err)
+	assert.False(t, val, "url-2 still writable")
+
+	req = engine.FlagRequest{Locator: store.Locator{SiteID: "radio-t", URL: "url-1"}, Flag: engine.ReadOnly,
+		Update: engine.FlagFalse}
+	_, err = b.Flag(req)
+	assert.NoError(t, err)
+	req = engine.FlagRequest{Locator: store.Locator{SiteID: "radio-t", URL: "url-1"}, Flag: engine.ReadOnly}
+	val, err = b.Flag(req)
+	assert.NoError(t, err)
+	assert.False(t, val, "url-1 writable")
+}
+
+func TestMemData_FlagVerified(t *testing.T) {
+
+	b := prepMem(t)
+	isVerified := func(site, user string) bool {
+		req := engine.FlagRequest{Flag: engine.Verified, Locator: store.Locator{SiteID: site}, UserID: user}
+		v, err := b.Flag(req)
+		require.NoError(t, err)
+		return v
+	}
+
+	setVerified := func(site, user string, status engine.FlagStatus) error {
+		req := engine.FlagRequest{Flag: engine.Verified, Locator: store.Locator{SiteID: site}, UserID: user, Update: status}
+		_, err := b.Flag(req)
+		return err
+	}
+
+	assert.False(t, isVerified("radio-t", "u1"), "nothing verified")
+
+	assert.NoError(t, setVerified("radio-t", "u1", engine.FlagTrue))
+	assert.True(t, isVerified("radio-t", "u1"), "u1 verified")
+
+	assert.False(t, isVerified("radio-t", "u2"), "u2 still not verified")
+	assert.NoError(t, setVerified("radio-t", "u1", engine.FlagFalse))
+	assert.False(t, isVerified("radio-t", "u1"), "u1 not verified anymore")
+
+	assert.NoError(t, setVerified("bad", "u1", engine.FlagTrue))
+	assert.NoError(t, setVerified("radio-t", "u1xyz", engine.FlagFalse))
+
+	assert.False(t, isVerified("radio-t-bad", "u1"), "nothing verified on wrong site")
+
+	assert.NoError(t, setVerified("radio-t", "u1", engine.FlagTrue))
+	assert.NoError(t, setVerified("radio-t", "u2", engine.FlagTrue))
+	assert.NoError(t, setVerified("radio-t", "u3", engine.FlagFalse))
+}
+
+func TestMemData_FlagListVerified(t *testing.T) {
+
+	b := prepMem(t)
+	toIDs := func(inp []interface{}) (res []string) {
+		res = make([]string, len(inp))
+		for i, v := range inp {
+			vv, ok := v.(string)
+			require.True(t, ok)
+			res[i] = vv
+		}
+		sort.Strings(res)
+		return res
+	}
+
+	setVerified := func(site, user string, status engine.FlagStatus) error {
+		req := engine.FlagRequest{Flag: engine.Verified, Locator: store.Locator{SiteID: site}, UserID: user, Update: status}
+		_, err := b.Flag(req)
+		return err
+	}
+
+	ids, err := b.ListFlags(engine.FlagRequest{Flag: engine.Verified, Locator: store.Locator{SiteID: "radio-t"}})
+	assert.NoError(t, err)
+	assert.Equal(t, []string{}, toIDs(ids), "verified list empty")
+
+	assert.NoError(t, setVerified("radio-t", "u1", engine.FlagTrue))
+	assert.NoError(t, setVerified("radio-t", "u2", engine.FlagTrue))
+	ids, err = b.ListFlags(engine.FlagRequest{Flag: engine.Verified, Locator: store.Locator{SiteID: "radio-t"}})
+	assert.NoError(t, err)
+	assert.EqualValues(t, []string{"u1", "u2"}, toIDs(ids), "verified 2 ids")
+
+	ids, err = b.ListFlags(engine.FlagRequest{Flag: engine.Verified, Locator: store.Locator{SiteID: "radio-t-bad"}})
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(ids))
+
+	ids, err = b.ListFlags(engine.FlagRequest{})
+	assert.Error(t, err)
+	assert.Equal(t, 0, len(ids))
+}
+
+func TestMemData_FlagListBlocked(t *testing.T) {
+
+	b := prepMem(t)
+	setBlocked := func(site, user string, status engine.FlagStatus, ttl time.Duration) error {
+		req := engine.FlagRequest{Flag: engine.Blocked, Locator: store.Locator{SiteID: site}, UserID: user, Update: status,
+			TTL: ttl}
+		_, err := b.Flag(req)
+		return err
+	}
+
+	toBlocked := func(inp []interface{}) (res []store.BlockedUser) {
+		res = make([]store.BlockedUser, len(inp))
+		for i, v := range inp {
+			vv, ok := v.(store.BlockedUser)
+			require.True(t, ok)
+			res[i] = vv
+		}
+		return res
+	}
+	assert.NoError(t, setBlocked("radio-t", "user1", engine.FlagTrue, 0))
+	assert.NoError(t, setBlocked("radio-t", "user2", engine.FlagTrue, 50*time.Millisecond))
+	assert.NoError(t, setBlocked("radio-t", "user3", engine.FlagFalse, 0))
+
+	vv, err := b.ListFlags(engine.FlagRequest{Flag: engine.Blocked, Locator: store.Locator{SiteID: "radio-t"}})
+	assert.NoError(t, err)
+
+	blockedList := toBlocked(vv)
+	var blockedIds = make([]string, len(blockedList))
+	for i, x := range blockedList {
+		blockedIds[i] = x.ID
+	}
+	require.Equal(t, 2, len(blockedList), b.metaUsers)
+	assert.ElementsMatch(t, []string{"user1", "user2"}, blockedIds)
+	t.Logf("%+v", blockedList)
+
+	// check block expiration
+	time.Sleep(50 * time.Millisecond)
+	vv, err = b.ListFlags(engine.FlagRequest{Flag: engine.Blocked, Locator: store.Locator{SiteID: "radio-t"}})
+	assert.NoError(t, err)
+	blockedList = toBlocked(vv)
+	require.Equal(t, 1, len(blockedList))
+	assert.Equal(t, "user1", blockedList[0].ID)
+
+	vv, err = b.ListFlags(engine.FlagRequest{Flag: engine.Blocked, Locator: store.Locator{SiteID: "bad"}})
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(vv))
+}
+
+func TestMemData_DeleteComment(t *testing.T) {
+
+	b := prepMem(t)
+	reqReq := engine.FindRequest{Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, Sort: "time"}
+	res, err := b.Find(reqReq)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(res), "initially 2 comments")
+
+	count, err := b.Count(reqReq)
+	require.NoError(t, err)
+	require.Equal(t, 2, count, "count=2 initially")
+
+	delReq := engine.DeleteRequest{Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"},
+		CommentID: res[0].ID, DeleteMode: store.SoftDelete}
+
+	err = b.Delete(delReq)
+	assert.NoError(t, err)
+
+	res, err = b.Find(reqReq)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(res))
+	assert.Equal(t, "", res[0].Text)
+	assert.True(t, res[0].Deleted, "marked deleted")
+	assert.Equal(t, store.User{Name: "user name", ID: "user1", Picture: "", Admin: false, Blocked: false, IP: ""}, res[0].User)
+
+	assert.Equal(t, "some text2", res[1].Text)
+	assert.False(t, res[1].Deleted)
+
+	comments, err := b.Find(engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, Limit: 10})
+	assert.NoError(t, err)
+	assert.Equal(t, 1, len(comments), "1 in last, 1 removed")
+
+	count, err = b.Count(reqReq)
+	require.NoError(t, err)
+	assert.Equal(t, 1, count)
+
+	delReq.CommentID = "123456"
+	err = b.Delete(delReq)
+	assert.Error(t, err)
+
+	delReq.Locator.SiteID = "bad"
+	delReq.CommentID = res[0].ID
+	err = b.Delete(delReq)
+	assert.EqualError(t, err, `not found`)
+
+	delReq.Locator = store.Locator{URL: "https://radio-t.com/bad", SiteID: "radio-t"}
+	err = b.Delete(delReq)
+	assert.EqualError(t, err, `not found`)
+
+	err = b.Delete(engine.DeleteRequest{Locator: store.Locator{SiteID: "bad"}})
+	assert.Error(t, err)
+}
+
+func TestMemData_Close(t *testing.T) {
+	b := prepMem(t)
+	assert.NoError(t, b.Close())
+}
+
+func TestMemData_DeleteHard(t *testing.T) {
+
+	b := prepMem(t)
+	reqReq := engine.FindRequest{Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, Sort: "time"}
+	res, err := b.Find(reqReq)
+	assert.NoError(t, err)
+	assert.Equal(t, 2, len(res), "initially 2 comments")
+
+	delReq := engine.DeleteRequest{Locator: store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"},
+		CommentID: res[0].ID, DeleteMode: store.HardDelete}
+	err = b.Delete(delReq)
+	assert.NoError(t, err)
+
+	res, err = b.Find(reqReq)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(res))
+	assert.Equal(t, "", res[0].Text)
+	assert.True(t, res[0].Deleted, "marked deleted")
+	assert.Equal(t, store.User{Name: "deleted", ID: "deleted", Picture: "", Admin: false, Blocked: false, IP: ""}, res[0].User)
+}
+
+func TestMemData_DeleteAll(t *testing.T) {
+	b := prepMem(t)
+	delReq := engine.DeleteRequest{Locator: store.Locator{SiteID: "radio-t"}}
+	err := b.Delete(delReq)
+	assert.NoError(t, err)
+
+	comments, err := b.Find(engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, Limit: 10})
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(comments), "nothing left")
+}
+
+func TestMemData_UserDetailAll(t *testing.T) {
+	b := prepMem(t)
+
+	val, err := b.UserDetail(engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, Detail: engine.AllUserDetails})
+	require.NoError(t, err)
+	require.Nil(t, val)
+}
+
+func TestMemData_UserDetailErrors(t *testing.T) {
+	b := prepMem(t)
+
+	val, err := b.UserDetail(engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, Detail: engine.UserEmail, Update: "value1"})
+	require.EqualError(t, err, "userid cannot be empty in request for single detail")
+	require.Nil(t, val)
+
+	val, err = b.UserDetail(engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, Detail: engine.AllUserDetails, Update: "value1"})
+	require.EqualError(t, err, "unsupported request with userdetail all")
+	require.Nil(t, val)
+
+	val, err = b.UserDetail(engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, Detail: "bad"})
+	require.EqualError(t, err, "unsupported detail \"bad\"")
+	require.Nil(t, val)
+}
+
+func TestMemData_DeleteUserDetail(t *testing.T) {
+	var (
+		createEmailUser    = engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "user1", Detail: engine.UserEmail, Update: "value1"}
+		readEmailUser      = engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "user1", Detail: engine.UserEmail}
+		createTelegramUser = engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "user1", Detail: engine.UserTelegram, Update: "value1"}
+		readTelegramUser   = engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "user1", Detail: engine.UserTelegram}
+		emailSet           = []engine.UserDetailEntry{{UserID: "user1", Email: "value1"}}
+		emailUnset         = []engine.UserDetailEntry{{UserID: "user1", Email: ""}}
+		telegramSet        = []engine.UserDetailEntry{{UserID: "user1", Telegram: "value1"}}
+		telegramUnset      = []engine.UserDetailEntry{{UserID: "user1", Telegram: ""}}
+	)
+
+	b := prepMem(t)
+
+	var testData = []struct {
+		delReq    engine.DeleteRequest
+		detailReq engine.UserDetailRequest
+		expected  []engine.UserDetailEntry
+	}{
+		{delReq: engine.DeleteRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "user1", UserDetail: engine.UserEmail},
+			detailReq: createEmailUser, expected: emailSet},
+		{delReq: engine.DeleteRequest{Locator: store.Locator{SiteID: "bad"}, UserID: "user1", UserDetail: engine.UserEmail},
+			detailReq: readEmailUser, expected: emailSet},
+		{delReq: engine.DeleteRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "user1", UserDetail: engine.UserEmail},
+			detailReq: readEmailUser, expected: emailUnset},
+		{delReq: engine.DeleteRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "user1", UserDetail: engine.UserTelegram},
+			detailReq: createTelegramUser, expected: telegramSet},
+		{delReq: engine.DeleteRequest{Locator: store.Locator{SiteID: "bad"}, UserID: "user1", UserDetail: engine.UserTelegram},
+			detailReq: readTelegramUser, expected: telegramSet},
+		{delReq: engine.DeleteRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "user1", UserDetail: engine.UserTelegram},
+			detailReq: readTelegramUser, expected: telegramUnset},
+		{delReq: engine.DeleteRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "user1", UserDetail: engine.AllUserDetails},
+			detailReq: createEmailUser, expected: emailSet},
+		{delReq: engine.DeleteRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "user1", UserDetail: engine.AllUserDetails},
+			detailReq: readEmailUser, expected: emailUnset},
+	}
+
+	for i, x := range testData {
+		err := b.Delete(x.delReq)
+		require.NoError(t, err, "delete request #%d error", i)
+
+		val, err := b.UserDetail(x.detailReq)
+		require.NoError(t, err, "user request #%d error", i)
+		require.Equal(t, x.expected, val, "user request #%d result", i)
+	}
+}
+
+func TestMemAdmin_DeleteUserHard(t *testing.T) {
+	b := prepMem(t)
+	err := b.Delete(engine.DeleteRequest{Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1",
+		DeleteMode: store.HardDelete})
+	require.NoError(t, err)
+
+	comments, err := b.Find(engine.FindRequest{Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com"},
+		Sort: "time"})
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(comments), "2 comments with deleted info")
+	assert.Equal(t, store.User{Name: "deleted", ID: "deleted", Picture: "", Admin: false, Blocked: false, IP: ""}, comments[0].User)
+	assert.Equal(t, store.User{Name: "deleted", ID: "deleted", Picture: "", Admin: false, Blocked: false, IP: ""}, comments[1].User)
+
+	c, err := b.Count(engine.FindRequest{Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com"}})
+	assert.NoError(t, err)
+	assert.Equal(t, 0, c, "0 count")
+
+	_, err = b.Find(engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1", Limit: 5})
+	assert.NoError(t, err, "no comments for user user1 in store")
+
+	comments, err = b.Find(engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, Sort: "time"})
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(comments), "nothing left")
+}
+
+func TestMemAdmin_DeleteUserSoft(t *testing.T) {
+
+	b := prepMem(t)
+	err := b.Delete(engine.DeleteRequest{Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1",
+		DeleteMode: store.SoftDelete})
+	require.NoError(t, err)
+
+	comments, err := b.Find(engine.FindRequest{Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com"},
+		Sort: "time"})
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(comments), "2 comments with deleted info")
+	assert.Equal(t, store.User{Name: "user name", ID: "user1", Picture: "", Admin: false, Blocked: false, IP: ""}, comments[0].User)
+	assert.Equal(t, store.User{Name: "user name", ID: "user1", Picture: "", Admin: false, Blocked: false, IP: ""}, comments[1].User)
+
+	c, err := b.Count(engine.FindRequest{Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com"}})
+	assert.NoError(t, err)
+	assert.Equal(t, 0, c, "0 count")
+
+	comments, err = b.Find(engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, UserID: "user1", Limit: 5})
+	assert.NoError(t, err, "no comments for user user1 in store")
+	require.Equal(t, 2, len(comments), "2 comments with deleted info")
+	assert.True(t, comments[0].Deleted)
+	assert.True(t, comments[1].Deleted)
+	assert.Equal(t, "", comments[0].Text)
+	assert.Equal(t, "", comments[1].Text)
+
+	comments, err = b.Find(engine.FindRequest{Locator: store.Locator{SiteID: "radio-t"}, Sort: "time"})
+	assert.NoError(t, err)
+	assert.Equal(t, 0, len(comments), "nothing left")
+}
+
+func prepMem(t *testing.T) *MemData {
+
+	m := NewMemData()
+
+	comment := store.Comment{
+		ID:        "id-1",
+		Text:      `some text, <a href="http://radio-t.com">link</a>`,
+		Timestamp: time.Date(2017, 12, 20, 15, 18, 22, 0, time.Local),
+		Locator:   store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"},
+		User:      store.User{ID: "user1", Name: "user name"},
+	}
+	_, err := m.Create(comment)
+	require.NoError(t, err)
+
+	comment = store.Comment{
+		ID:        "id-2",
+		Text:      "some text2",
+		Timestamp: time.Date(2017, 12, 20, 15, 18, 23, 0, time.Local),
+		Locator:   store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"},
+		User:      store.User{ID: "user1", Name: "user name"},
+	}
+	_, err = m.Create(comment)
+	require.NoError(t, err)
+	return m
+}
+
+func getReq(locator store.Locator, commentID string) engine.GetRequest {
+	return engine.GetRequest{
+		Locator:   locator,
+		CommentID: commentID,
+	}
+}

backend/_example/memory_store/accessor/image.go

@@ -0,0 +1,124 @@
+/*
+ * Copyright 2020 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package accessor
+
+import (
+	"context"
+	"sync"
+	"time"
+
+	log "github.com/go-pkgz/lgr"
+	"github.com/pkg/errors"
+
+	"github.com/umputun/remark42/backend/app/store/image"
+)
+
+// MemImage implements image.Store with memory backend
+type MemImage struct {
+	imagesStaging map[string][]byte
+	images        map[string][]byte
+	insertTime    map[string]time.Time
+	mu            sync.RWMutex
+}
+
+// NewMemImageStore makes admin Store in memory.
+func NewMemImageStore() *MemImage {
+	log.Print("[DEBUG] make memory image store")
+	return &MemImage{
+		imagesStaging: map[string][]byte{},
+		images:        map[string][]byte{},
+		insertTime:    map[string]time.Time{},
+	}
+}
+
+// Save stores image with passed id to staging
+func (m *MemImage) Save(id string, img []byte) error {
+	m.mu.Lock()
+	m.imagesStaging[id] = img
+	m.insertTime[id] = time.Now()
+	m.mu.Unlock()
+
+	return nil
+}
+
+// ResetCleanupTimer resets cleanup timer for the image
+func (m *MemImage) ResetCleanupTimer(id string) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	if _, ok := m.insertTime[id]; ok {
+		m.insertTime[id] = time.Now()
+		return nil
+	}
+	return errors.Errorf("image %s not found", id)
+}
+
+// Load image by ID
+func (m *MemImage) Load(id string) ([]byte, error) {
+	m.mu.RLock()
+	img, ok := m.images[id]
+	if !ok {
+		img, ok = m.imagesStaging[id]
+	}
+	m.mu.RUnlock()
+	if !ok {
+		return nil, errors.Errorf("image %s not found", id)
+	}
+	return img, nil
+}
+
+// Commit moves image from staging to permanent
+func (m *MemImage) Commit(id string) error {
+	m.mu.RLock()
+	img, ok := m.imagesStaging[id]
+	m.mu.RUnlock()
+	if !ok {
+		return errors.Errorf("failed to commit %s, not found in staging", id)
+	}
+
+	m.mu.Lock()
+	m.images[id] = img
+	m.mu.Unlock()
+
+	return nil
+}
+
+// Cleanup runs removal loop for old images on staging
+func (m *MemImage) Cleanup(_ context.Context, ttl time.Duration) error {
+	var idsToRemove []string
+
+	m.mu.RLock()
+	for id, t := range m.insertTime {
+		age := time.Since(t)
+		if age > ttl {
+			log.Printf("[INFO] remove staging image %s, age %v", id, age)
+			idsToRemove = append(idsToRemove, id)
+		}
+	}
+	m.mu.RUnlock()
+
+	m.mu.Lock()
+	for _, id := range idsToRemove {
+		delete(m.insertTime, id)
+		delete(m.imagesStaging, id)
+	}
+	m.mu.Unlock()
+	return nil
+}
+
+// Info returns meta information about storage
+func (m *MemImage) Info() (image.StoreInfo, error) {
+	var ts time.Time
+	m.mu.RLock()
+	for _, t := range m.insertTime {
+		if ts.IsZero() || t.Before(ts) {
+			ts = t
+		}
+	}
+	m.mu.RUnlock()
+
+	return image.StoreInfo{FirstStagingImageTS: ts}, nil
+}

backend/_example/memory_store/accessor/image_test.go

@@ -0,0 +1,103 @@
+/*
+ * Copyright 2020 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package accessor
+
+import (
+	"context"
+	"encoding/base64"
+	"io"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// gopher png for test, from https://golang.org/src/image/png/example_test.go
+const gopher = "iVBORw0KGgoAAAANSUhEUgAAAEsAAAA8CAAAAAALAhhPAAAFfUlEQVRYw62XeWwUVRzHf2" +
+	"+OPbo9d7tsWyiyaZti6eWGAhISoIGKECEKCAiJJkYTiUgTMYSIosYYBBIUIxoSPIINEBDi2VhwkQrVsj1ESgu9doHWdrul7ba" +
+	"73WNm3vOPtsseM9MdwvvrzTs+8/t95ze/33sI5BqiabU6m9En8oNjduLnAEDLUsQXFF8tQ5oxK3vmnNmDSMtrncks9Hhtt" +
+	"/qeWZapHb1ha3UqYSWVl2ZmpWgaXMXGohQAvmeop3bjTRtv6SgaK/Pb9/bFzUrYslbFAmHPp+3WhAYdr+7GN/YnpN46Opv55VDs" +
+	"JkoEpMrY/vO2BIYQ6LLvm0ThY3MzDzzeSJeeWNyTkgnIE5ePKsvKlcg/0T9QMzXalwXMlj54z4c0rh/mzEfr+FgWEz2w6uk" +
+	"8dkzFAgcARAgNp1ZYef8bH2AgvuStbc2/i6CiWGj98y2tw2l4FAXKkQBIf+exyRnteY83LfEwDQAYCoK+P6bxkZm/0966LxcAA" +
+	"ILHB56kgD95PPxltuYcMtFTWw/FKkY/6Opf3GGd9ZF+Qp6mzJxzuRSractOmJrH1u8XTvWFHINNkLQLMR+XHXvfPPHw967raE1xxwtA36I" +
+	"MRfkAAG29/7mLuQcb2WOnsJReZGfpiHsSBX81cvMKywYZHhX5hFPtOqPGWZCXnhWGAu6lX91ElKXSalcLXu3UaOXVay57ZSe5f6Gpx7J2" +
+	"MXAsi7EqSp09b/MirKSyJfnfEEgeDjl8FgDAfvewP03zZ+AJ0m9aFRM8eEHBDRKjfcreDXnZdQuAxXpT2NRJ7xl3UkLBhuVGU16gZiGOgZm" +
+	"rSbRdqkILuL/yYoSXHHkl9KXgqNu3PB8oRg0geC5vFmLjad6mUyTKLmF3OtraWDIfACyXqmephaDABawfpi6tqqBZytfQMqOz6S09iWXhkt" +
+	"rRaB8Xz4Yi/8gyABDm5NVe6qq/3VzPrcjELWrebVuyY2T7ar4zQyybUCtsQ5Es1FGaZVrRVQwAgHGW2ZCRZshI5bGQi7HesyE972pOSeMM0" +
+	"dSktlzxRdrlqb3Osa6CCS8IJoQQQgBAbTAa5l5epO34rJszibJI8rxLfGzcp1dRosutGeb2VDNgqYrwTiPNsLxXiPi3dz7LiS1WBRBDBOnqEj" +
+	"yy3aQb+/bLiJzz9dIkscVBBLxMfSEac7kO4Fpkngi0ruNBeSOal+u8jgOuqPz12nryMLCniEjtOOOmpt+KEIqsEdocJjYXwrh9OZqWJQyPCTo67" +
+	"LNS/TdxLAv6R5ZNK9npEjbYdT33gRo4o5oTqR34R+OmaSzDBWsAIPhuRcgyoteNi9gF0KzNYWVItPf2TLoXEg+7isNC7uJkgo1iQWOfRSP9NR" +
+	"11RtbZZ3OMG/VhL6jvx+J1m87+RCfJChAtEBQkSBX2PnSiihc/Twh3j0h7qdYQAoRVsRGmq7HU2QRbaxVGa1D6nIOqaIWRjyRZpHMQKWKpZM5fe" +
+	"A+lzC4ZFultV8S6T0mzQGhQohi5I8iw+CsqBSxhFMuwyLgSwbghGb0AiIKkSDmGZVmJSiKihsiyOAUs70UkywooYP0bii9GdH4sfr1UNysd3fU" +
+	"yLLMQN+rsmo3grHl9VNJHbbwxoa47Vw5gupIqrZcjPh9R4Nye3nRDk199V+aetmvVtDRE8/+cbgAAgMIWGb3UA0MGLE9SCbWX670TDy" +
+	"1y98c3D27eppUjsZ6fql3jcd5rUe7+ZIlLNQny3Rd+E5Tct3WVhTM5RBCEdiEK0b6B+/ca2gYU393nFj/n1AygRQxPIUA043M42u85+z2S" +
+	"nssKrPl8Mx76NL3E6eXc3be7OD+H4WHbJkKI8AU8irbITQjZ+0hQcPEgId/Fn/pl9crKH02+5o2b9T/eMx7pKoskYgAAAABJRU5ErkJggg=="
+
+func gopherPNG() io.Reader { return base64.NewDecoder(base64.StdEncoding, strings.NewReader(gopher)) }
+
+func TestMemImage_LoadAfterSave(t *testing.T) {
+	svc := NewMemImageStore()
+	gopher, err := io.ReadAll(gopherPNG())
+	assert.NoError(t, err)
+
+	img, err := svc.Load("test_id")
+	assert.EqualError(t, err, "image test_id not found")
+	assert.Empty(t, img)
+
+	id := "test_img"
+	err = svc.Save(id, gopher)
+	assert.NoError(t, err)
+
+	img, err = svc.Load(id)
+	assert.NoError(t, err)
+	assert.Equal(t, gopher, img)
+
+	svc.ResetCleanupTimer(id)
+
+	err = svc.Commit(id)
+	assert.NoError(t, err)
+
+	err = svc.Cleanup(context.TODO(), 0)
+	assert.NoError(t, err)
+
+	img, err = svc.Load(id)
+	assert.NoError(t, err)
+	assert.Equal(t, gopher, img)
+}
+
+func TestMemImage_CommitFail(t *testing.T) {
+	svc := NewMemImageStore()
+	err := svc.Commit("test_id")
+	assert.EqualError(t, err, "failed to commit test_id, not found in staging")
+}
+
+func TestMemImage_Cleanup(t *testing.T) {
+	svc := NewMemImageStore()
+	err := svc.Cleanup(context.TODO(), time.Minute)
+	assert.NoError(t, err)
+}
+
+func TestMemImage_Info(t *testing.T) {
+	svc := NewMemImageStore()
+	gopher, err := io.ReadAll(gopherPNG())
+	assert.NoError(t, err)
+
+	// get info on empty storage, should be zero
+	info, err := svc.Info()
+	assert.NoError(t, err)
+	assert.True(t, info.FirstStagingImageTS.IsZero())
+
+	// save image
+	err = svc.Save("test_img", gopher)
+	assert.NoError(t, err)
+
+	// get info after saving, should be non-zero
+	info, err = svc.Info()
+	assert.NoError(t, err)
+	assert.False(t, info.FirstStagingImageTS.IsZero())
+}

backend/_example/memory_store/compose-dev-memstore.yml

@@ -0,0 +1,64 @@
+# compose file demonstrating custom storage use. The memory_store (see backend/_example/memory_store) starts
+# in a separate container and remark42 communicates to mem_store.r42 via STORE_RPC_API url
+
+version: "2"
+
+services:
+  remark42:
+    build:
+      context: ../../..
+      dockerfile: Dockerfile
+      args:
+        - SKIP_BACKEND_TEST=true
+        - SKIP_FRONTEND_TEST=true
+    image: umputun/remark42:dev
+    container_name: "remark42-dev"
+    hostname: "remark42-dev"
+    restart: always
+
+    logging:
+      driver: json-file
+      options:
+        max-size: "10m"
+        max-file: "5"
+
+    ports:
+      - "8080:8080" # primary rest server
+      - "8084:8084" # local oauth2 server
+
+    environment:
+      - REMARK_URL=http://127.0.0.1:8080
+      - SECRET=123456
+      - BACKUP_PATH=/srv/var/backup
+      - DEBUG=true
+      - EMOJI=true
+      - AUTH_ANON=true
+      - AUTH_DEV=true
+      - ADMIN_TYPE=rpc
+      - ADMIN_RPC_API=http://mem_store.r42:8080/cmd
+      - STORE_TYPE=rpc
+      - STORE_RPC_API=http://mem_store.r42:8080/cmd
+      - IMAGE_TYPE=rpc
+      - IMAGE_RPC_API=http://mem_store.r42:8080/cmd
+
+    volumes:
+      - ../../../var:/srv/var
+
+  mem_store.r42:
+    image: umputun/mem_store.r42
+    build:
+      context: ../../..
+      dockerfile: backend/_example/memory_store/Dockerfile
+    container_name: "mem_store.r42"
+    hostname: "mem_store.r42"
+
+    logging:
+      driver: json-file
+      options:
+        max-size: "10m"
+        max-file: "5"
+
+    environment:
+      - API=/cmd
+      - SECRET=123456
+      - DEBUG=true

backend/_example/memory_store/go.mod

@@ -0,0 +1,14 @@
+module github.com/umputun/remark42/memory_store
+
+go 1.16
+
+require (
+	github.com/go-pkgz/jrpc v0.2.0
+	github.com/go-pkgz/lgr v0.10.4
+	github.com/pkg/errors v0.9.1
+	github.com/stretchr/testify v1.7.0
+	github.com/umputun/go-flags v1.5.1
+	github.com/umputun/remark42/backend v1.8.1
+)
+
+replace github.com/umputun/remark42/backend => ../../

backend/_example/memory_store/go.sum

@@ -0,0 +1,786 @@
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backend/_example/memory_store/main.go

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2020 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/go-pkgz/jrpc"
+	log "github.com/go-pkgz/lgr"
+	"github.com/umputun/go-flags"
+
+	"github.com/umputun/remark42/memory_store/accessor"
+	"github.com/umputun/remark42/memory_store/server"
+)
+
+// opts with all cli commands and flags
+var opts struct {
+	API        string `long:"api" env:"API" default:"/" description:"api root url"`
+	Port       int    `long:"port" env:"PORT" default:"8080" description:"rpc server port"`
+	AuthUser   string `long:"auth-user" env:"AUTH_USER" default:"" description:"rpc auth user name"`
+	AuthPasswd string `long:"auth-passwd" env:"AUTH_PASSWD" default:"" description:"rpc auth password"`
+
+	Secret string `long:"secret" env:"SECRET" required:"true" description:"secret key"`
+	Dbg    bool   `long:"dbg" env:"DEBUG" description:"debug mode"`
+}
+
+var revision = "unknown"
+
+func main() {
+	fmt.Printf("remark42-memory module %s\n", revision)
+
+	if _, err := flags.Parse(&opts); err != nil {
+		os.Exit(2)
+	}
+	setupLog(opts.Dbg)
+
+	dataStore := accessor.NewMemData()
+	adminStore := accessor.NewMemAdminStore(opts.Secret)
+	imgStore := accessor.NewMemImageStore()
+
+	rpcServer := jrpc.Server{
+		API:        opts.API,
+		AuthUser:   opts.AuthUser,
+		AuthPasswd: opts.AuthPasswd,
+		Version:    revision,
+		AppName:    "remark42-memory",
+		Logger:     log.Default(),
+	}
+
+	srv := server.NewRPC(dataStore, adminStore, imgStore, &rpcServer)
+
+	admRec := accessor.AdminRec{
+		SiteID:  "remark",
+		Enabled: true,
+		IDs:     []string{"dev_user"},
+		Email:   "admin@example.com",
+	}
+	adminStore.Set("remark", admRec)
+
+	err := srv.Run(opts.Port)
+	log.Printf("[ERROR] server failed or terminated, %+v", err)
+}
+
+func setupLog(dbg bool) {
+	if dbg {
+		log.Setup(log.Debug, log.CallerFile, log.CallerFunc, log.Msec, log.LevelBraces)
+		return
+	}
+	log.Setup(log.Msec, log.LevelBraces)
+}

backend/_example/memory_store/server/admin.go

@@ -0,0 +1,93 @@
+/*
+ * Copyright 2020 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package server
+
+import (
+	"encoding/json"
+
+	"github.com/go-pkgz/jrpc"
+
+	"github.com/umputun/remark42/backend/app/store/admin"
+)
+
+// get admin key
+func (s *RPC) admKeyHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	var siteID string
+	if err := json.Unmarshal(params, &siteID); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+
+	key, err := s.adm.Key(siteID)
+	if err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	return jrpc.EncodeResponse(id, key, err)
+}
+
+// get admins list
+func (s *RPC) admAdminsHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	var siteID string
+	if err := json.Unmarshal(params, &siteID); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+
+	admins, err := s.adm.Admins(siteID)
+	if err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	return jrpc.EncodeResponse(id, admins, err)
+}
+
+// get admin email
+func (s *RPC) admEmailHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	var siteID string
+	if err := json.Unmarshal(params, &siteID); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+
+	email, err := s.adm.Email(siteID)
+	if err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	return jrpc.EncodeResponse(id, email, err)
+}
+
+// return site enabled status
+func (s *RPC) admEnabledHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	var siteID string
+	if err := json.Unmarshal(params, &siteID); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+
+	ok, err := s.adm.Enabled(siteID)
+	if err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	return jrpc.EncodeResponse(id, ok, err)
+}
+
+// onEvent returns nothing, callback to OnEvent
+func (s *RPC) admEventHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	var siteID string
+	var ps []interface{}
+	if err := json.Unmarshal(params, &ps); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	siteID, ok := ps[0].(string)
+	if !ok {
+		return jrpc.Response{Error: "wrong siteID type"}
+	}
+	evType, ok := ps[1].(float64)
+	if !ok {
+		return jrpc.Response{Error: "wrong event type"}
+	}
+	err := s.adm.OnEvent(siteID, admin.EventType(evType))
+	if err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	return jrpc.EncodeResponse(id, nil, err)
+}

backend/_example/memory_store/server/admin_test.go

@@ -0,0 +1,89 @@
+/*
+ * Copyright 2020 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package server
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/go-pkgz/jrpc"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/umputun/remark42/backend/app/store/admin"
+)
+
+func TestRPC_admKeyHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	ra := admin.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	key, err := ra.Key("any")
+	assert.NoError(t, err)
+	assert.Equal(t, "secret", key)
+}
+
+func TestRPC_admAdminsHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	ra := admin.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	_, err := ra.Admins("bad site")
+	assert.EqualError(t, err, "site bad site not found")
+
+	admins, err := ra.Admins("test-site")
+	assert.NoError(t, err)
+	assert.Equal(t, []string{"id1", "id2"}, admins)
+}
+
+func TestRPC_admEmailHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	ra := admin.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	_, err := ra.Admins("bad site")
+	assert.EqualError(t, err, "site bad site not found")
+
+	email, err := ra.Email("test-site")
+	assert.NoError(t, err)
+	assert.Equal(t, "admin@example.com", email)
+}
+
+func TestRPC_admEnabledHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	ra := admin.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	_, err := ra.Enabled("bad site")
+	assert.EqualError(t, err, "site bad site not found")
+
+	ok, err := ra.Enabled("test-site")
+	assert.NoError(t, err)
+	assert.Equal(t, true, ok)
+
+	ok, err = ra.Enabled("test-site-disabled")
+	assert.NoError(t, err)
+	assert.Equal(t, false, ok)
+}
+
+func TestRPC_admEventHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	ra := admin.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	err := ra.OnEvent("bad site", admin.EvCreate)
+	assert.EqualError(t, err, "site bad site not found")
+
+	err = ra.OnEvent("test-site", admin.EvCreate)
+	assert.NoError(t, err)
+}

backend/_example/memory_store/server/data.go

@@ -0,0 +1,125 @@
+/*
+ * Copyright 2020 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package server
+
+import (
+	"encoding/json"
+
+	"github.com/go-pkgz/jrpc"
+
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/engine"
+)
+
+func (s *RPC) createHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	comment := store.Comment{}
+	if err := json.Unmarshal(params, &comment); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	commentID, err := s.eng.Create(comment)
+	return jrpc.EncodeResponse(id, commentID, err)
+}
+
+// Find comments
+func (s *RPC) findHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	req := engine.FindRequest{}
+	if err := json.Unmarshal(params, &req); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	resp, err := s.eng.Find(req)
+	return jrpc.EncodeResponse(id, resp, err)
+}
+
+// Get comment
+func (s *RPC) getHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	req := engine.GetRequest{}
+	if err := json.Unmarshal(params, &req); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	comment, err := s.eng.Get(req)
+	return jrpc.EncodeResponse(id, comment, err)
+}
+
+// Update comment
+func (s *RPC) updateHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	comment := store.Comment{}
+	if err := json.Unmarshal(params, &comment); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	err := s.eng.Update(comment)
+	return jrpc.EncodeResponse(id, nil, err)
+}
+
+// counts for site and users
+func (s *RPC) countHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	req := engine.FindRequest{}
+	if err := json.Unmarshal(params, &req); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	count, err := s.eng.Count(req)
+	return jrpc.EncodeResponse(id, count, err)
+}
+
+// info get post meta info
+func (s *RPC) infoHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	req := engine.InfoRequest{}
+	if err := json.Unmarshal(params, &req); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	info, err := s.eng.Info(req)
+	return jrpc.EncodeResponse(id, info, err)
+}
+
+// flagHndl get and sets flag value
+func (s *RPC) flagHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	req := engine.FlagRequest{}
+	if err := json.Unmarshal(params, &req); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	status, err := s.eng.Flag(req)
+	return jrpc.EncodeResponse(id, status, err)
+}
+
+// listFlagsHndl list flags for given request
+func (s *RPC) listFlagsHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	req := engine.FlagRequest{}
+	if err := json.Unmarshal(params, &req); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	flags, err := s.eng.ListFlags(req)
+	return jrpc.EncodeResponse(id, flags, err)
+}
+
+// userDetailHndl sets or gets single detail value, or gets all details for requested site.
+// userDetailHndl returns list even for single entry request is a compromise in order to have both single detail getting and setting
+// and all site's details listing under the same function (and not to extend engine interface by two separate functions).
+func (s *RPC) userDetailHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	req := engine.UserDetailRequest{}
+	if err := json.Unmarshal(params, &req); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	value, err := s.eng.UserDetail(req)
+	return jrpc.EncodeResponse(id, value, err)
+}
+
+// deleteHndl delete post(s), user, comment, user details, or everything
+func (s *RPC) deleteHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	req := engine.DeleteRequest{}
+	if err := json.Unmarshal(params, &req); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	err := s.eng.Delete(req)
+	return jrpc.EncodeResponse(id, nil, err)
+}
+
+// close store
+func (s *RPC) closeHndl(_ uint64, _ json.RawMessage) (rr jrpc.Response) {
+	if err := s.eng.Close(); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	return jrpc.Response{}
+}

backend/_example/memory_store/server/data_test.go

@@ -0,0 +1,306 @@
+/*
+ * Copyright 2020 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package server
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/go-pkgz/jrpc"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/engine"
+)
+
+func TestRPC_createHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	re := engine.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	id, err := re.Create(store.Comment{ID: "123456", Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		Text: "text 123", User: store.User{ID: "u1", Name: "user1"}})
+	assert.NoError(t, err)
+	assert.Equal(t, "123456", id)
+}
+
+func TestRPC_findHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	re := engine.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	findReq := engine.FindRequest{Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"}}
+	comments, err := re.Find(findReq)
+	require.NoError(t, err)
+	assert.Equal(t, 0, len(comments))
+
+	c := store.Comment{ID: "123456", Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		Text: "text 123", User: store.User{ID: "u1", Name: "user1"}}
+	id, err := re.Create(c)
+	assert.NoError(t, err)
+	assert.Equal(t, "123456", id)
+
+	comments, err = re.Find(findReq)
+	require.NoError(t, err)
+	assert.Equal(t, 1, len(comments))
+	assert.Equal(t, c, comments[0])
+}
+
+func TestRPC_getHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	re := engine.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	req := engine.GetRequest{
+		Locator:   store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		CommentID: "123456",
+	}
+
+	_, err := re.Get(req)
+	assert.EqualError(t, err, "not found")
+
+	c := store.Comment{ID: "123456", Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		Text: "text 123", User: store.User{ID: "u1", Name: "user1"}}
+	_, err = re.Create(c)
+	assert.NoError(t, err)
+
+	comment, err := re.Get(req)
+	assert.NoError(t, err)
+	assert.Equal(t, c, comment)
+}
+
+func TestRPC_updateHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	re := engine.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+
+	c := store.Comment{ID: "123456", Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		Text: "text 123", User: store.User{ID: "u1", Name: "user1"}}
+	err := re.Update(c)
+	assert.EqualError(t, err, "not found")
+
+	_, err = re.Create(c)
+	assert.NoError(t, err)
+
+	c.Text = "updates"
+	err = re.Update(c)
+	assert.NoError(t, err)
+
+	req := engine.GetRequest{
+		Locator:   store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		CommentID: "123456",
+	}
+	comment, err := re.Get(req)
+	assert.NoError(t, err)
+	assert.Equal(t, c, comment)
+}
+
+func TestRPC_countHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	re := engine.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	findReq := engine.FindRequest{Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"}}
+	count, err := re.Count(findReq)
+	require.NoError(t, err)
+	assert.Equal(t, 0, count)
+
+	c := store.Comment{ID: "123456", Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		Text: "text 123", User: store.User{ID: "u1", Name: "user1"}}
+	id, err := re.Create(c)
+	assert.NoError(t, err)
+	assert.Equal(t, "123456", id)
+
+	count, err = re.Count(findReq)
+	require.NoError(t, err)
+	assert.Equal(t, 1, count)
+}
+
+func TestRPC_infoHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	re := engine.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+
+	c := store.Comment{ID: "123456", Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		Text: "text 123", User: store.User{ID: "u1", Name: "user1"}}
+	id, err := re.Create(c)
+	assert.NoError(t, err)
+	assert.Equal(t, "123456", id)
+
+	infoReq := engine.InfoRequest{Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"}}
+	info, err := re.Info(infoReq)
+	require.NoError(t, err)
+	assert.Equal(t, 1, len(info))
+	i := info[0]
+	assert.Equal(t, store.PostInfo{URL: "http://example.com/post1", Count: 1}, i)
+}
+
+func TestRPC_flagHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	re := engine.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+
+	c := store.Comment{ID: "123456", Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		Text: "text 123", User: store.User{ID: "u1", Name: "user1"}}
+	id, err := re.Create(c)
+	assert.NoError(t, err)
+	assert.Equal(t, "123456", id)
+
+	flagReq := engine.FlagRequest{
+		Flag: engine.Verified,
+		Locator: store.Locator{
+			SiteID: "test-site",
+		},
+		UserID: "u1",
+	}
+	status, err := re.Flag(flagReq)
+	require.NoError(t, err)
+	assert.Equal(t, false, status)
+
+	flagReq.Update = engine.FlagTrue
+	status, err = re.Flag(flagReq)
+	require.NoError(t, err)
+	assert.Equal(t, true, status)
+
+	flagReq.Update = engine.FlagNonSet
+	status, err = re.Flag(flagReq)
+	require.NoError(t, err)
+	assert.Equal(t, true, status)
+}
+
+func TestRPC_listFlagsHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	re := engine.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+
+	c := store.Comment{ID: "123456", Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		Text: "text 123", User: store.User{ID: "u1", Name: "user1"}}
+	id, err := re.Create(c)
+	assert.NoError(t, err)
+	assert.Equal(t, "123456", id)
+
+	flagReq := engine.FlagRequest{
+		Flag:   engine.Verified,
+		UserID: "u1",
+		Locator: store.Locator{
+			SiteID: "test-site",
+		},
+	}
+	flags, err := re.ListFlags(flagReq)
+	require.NoError(t, err)
+	assert.Equal(t, []interface{}{}, flags)
+
+	flagReq.Update = engine.FlagTrue
+	status, err := re.Flag(flagReq)
+	require.NoError(t, err)
+	assert.Equal(t, true, status)
+
+	flags, err = re.ListFlags(flagReq)
+	require.NoError(t, err)
+	assert.Equal(t, []interface{}{"u1"}, flags)
+}
+
+func TestRPC_userDetailHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	re := engine.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+
+	// add to entries to DB before we start
+	result, err := re.UserDetail(engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "u1", Detail: engine.UserEmail, Update: "test@example.com"})
+	assert.NoError(t, err, "No error inserting entry expected")
+	assert.ElementsMatch(t, []engine.UserDetailEntry{{UserID: "u1", Email: "test@example.com"}}, result)
+	result, err = re.UserDetail(engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "u2", Detail: engine.UserEmail, Update: "other@example.com"})
+	assert.NoError(t, err, "No error inserting entry expected")
+	assert.ElementsMatch(t, []engine.UserDetailEntry{{UserID: "u2", Email: "other@example.com"}}, result)
+
+	// try to change existing entry with wrong SiteID
+	result, err = re.UserDetail(engine.UserDetailRequest{Locator: store.Locator{SiteID: "bad"}, UserID: "u2", Detail: engine.UserEmail, Update: "not_relevant"})
+	assert.NoError(t, err, "Updating existing entry with wrong SiteID doesn't produce error")
+	assert.ElementsMatch(t, []engine.UserDetailEntry{}, result, "Updating existing entry with wrong SiteID doesn't change anything")
+
+	// stateless tests without changing the state we set up before
+	var testData = []struct {
+		req      engine.UserDetailRequest
+		error    string
+		expected []engine.UserDetailEntry
+	}{
+		{req: engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "u1", Detail: engine.UserEmail},
+			expected: []engine.UserDetailEntry{{UserID: "u1", Email: "test@example.com"}}},
+		{req: engine.UserDetailRequest{Locator: store.Locator{SiteID: "bad"}, UserID: "u1", Detail: engine.UserEmail},
+			expected: []engine.UserDetailEntry{}},
+		{req: engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, UserID: "u1xyz", Detail: engine.UserEmail},
+			expected: []engine.UserDetailEntry{}},
+		{req: engine.UserDetailRequest{Detail: engine.UserEmail, Update: "new_value"},
+			error: `userid cannot be empty in request for single detail`},
+		{req: engine.UserDetailRequest{Detail: engine.UserDetail("bad")},
+			error: `unsupported detail "bad"`},
+		{req: engine.UserDetailRequest{Update: "not_relevant", Detail: engine.AllUserDetails},
+			error: `unsupported request with userdetail all`},
+		{req: engine.UserDetailRequest{Locator: store.Locator{SiteID: "test-site"}, Detail: engine.AllUserDetails},
+			expected: []engine.UserDetailEntry{{UserID: "u1", Email: "test@example.com"}, {UserID: "u2", Email: "other@example.com"}}},
+	}
+
+	for i, x := range testData {
+		result, err := re.UserDetail(x.req)
+		if x.error != "" {
+			assert.EqualError(t, err, x.error, "Error should match expected for case %d", i)
+		} else {
+			assert.NoError(t, err, "Error is not expected expected for case %d", i)
+		}
+		assert.ElementsMatch(t, x.expected, result, "Result should match expected for case %d", i)
+	}
+}
+
+func TestRPC_deleteHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	re := engine.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	req := engine.DeleteRequest{
+		Locator:   store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		CommentID: "123456",
+	}
+
+	err := re.Delete(req)
+	assert.EqualError(t, err, "not found")
+
+	c := store.Comment{ID: "123456", Locator: store.Locator{SiteID: "test-site", URL: "http://example.com/post1"},
+		Text: "text 123", User: store.User{ID: "u1", Name: "user1"}}
+	_, err = re.Create(c)
+	assert.NoError(t, err)
+
+	err = re.Delete(req)
+	assert.NoError(t, err)
+}
+
+func TestRPC_closeHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	re := engine.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	err := re.Close()
+	assert.NoError(t, err)
+}

backend/_example/memory_store/server/image.go

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2020 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package server
+
+import (
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"time"
+
+	"github.com/go-pkgz/jrpc"
+)
+
+func (s *RPC) imgSaveWithIDHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	var req [2]string
+	if err := json.Unmarshal(params, &req); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	img, err := base64.StdEncoding.DecodeString(req[1])
+	if err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	err = s.img.Save(req[0], img)
+	return jrpc.EncodeResponse(id, nil, err)
+}
+
+func (s *RPC) imgResetClnTimerHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	var fileID string
+	if err := json.Unmarshal(params, &fileID); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	err := s.img.ResetCleanupTimer(fileID)
+	return jrpc.EncodeResponse(id, nil, err)
+
+}
+
+func (s *RPC) imgLoadHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	var fileID string
+	if err := json.Unmarshal(params, &fileID); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	value, err := s.img.Load(fileID)
+	return jrpc.EncodeResponse(id, value, err)
+}
+
+func (s *RPC) imgCommitHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	var fileID string
+	if err := json.Unmarshal(params, &fileID); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	err := s.img.Commit(fileID)
+	return jrpc.EncodeResponse(id, nil, err)
+}
+
+func (s *RPC) imgCleanupHndl(id uint64, params json.RawMessage) (rr jrpc.Response) {
+	var ttl time.Duration
+	if err := json.Unmarshal(params, &ttl); err != nil {
+		return jrpc.Response{Error: err.Error()}
+	}
+	err := s.img.Cleanup(context.TODO(), ttl)
+	return jrpc.EncodeResponse(id, nil, err)
+}
+
+func (s *RPC) imgInfoHndl(id uint64, _ json.RawMessage) (rr jrpc.Response) {
+	info, err := s.img.Info()
+	return jrpc.EncodeResponse(id, info, err)
+}

backend/_example/memory_store/server/image_test.go

@@ -0,0 +1,161 @@
+/*
+ * Copyright 2020 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package server
+
+import (
+	"context"
+	"encoding/base64"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/go-pkgz/jrpc"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/umputun/remark42/backend/app/store/image"
+)
+
+// gopher png for test, from https://golang.org/src/image/png/example_test.go
+const gopher = "iVBORw0KGgoAAAANSUhEUgAAAEsAAAA8CAAAAAALAhhPAAAFfUlEQVRYw62XeWwUVRzHf2" +
+	"+OPbo9d7tsWyiyaZti6eWGAhISoIGKECEKCAiJJkYTiUgTMYSIosYYBBIUIxoSPIINEBDi2VhwkQrVsj1ESgu9doHWdrul7ba" +
+	"73WNm3vOPtsseM9MdwvvrzTs+8/t95ze/33sI5BqiabU6m9En8oNjduLnAEDLUsQXFF8tQ5oxK3vmnNmDSMtrncks9Hhtt" +
+	"/qeWZapHb1ha3UqYSWVl2ZmpWgaXMXGohQAvmeop3bjTRtv6SgaK/Pb9/bFzUrYslbFAmHPp+3WhAYdr+7GN/YnpN46Opv55VDs" +
+	"JkoEpMrY/vO2BIYQ6LLvm0ThY3MzDzzeSJeeWNyTkgnIE5ePKsvKlcg/0T9QMzXalwXMlj54z4c0rh/mzEfr+FgWEz2w6uk" +
+	"8dkzFAgcARAgNp1ZYef8bH2AgvuStbc2/i6CiWGj98y2tw2l4FAXKkQBIf+exyRnteY83LfEwDQAYCoK+P6bxkZm/0966LxcAA" +
+	"ILHB56kgD95PPxltuYcMtFTWw/FKkY/6Opf3GGd9ZF+Qp6mzJxzuRSractOmJrH1u8XTvWFHINNkLQLMR+XHXvfPPHw967raE1xxwtA36I" +
+	"MRfkAAG29/7mLuQcb2WOnsJReZGfpiHsSBX81cvMKywYZHhX5hFPtOqPGWZCXnhWGAu6lX91ElKXSalcLXu3UaOXVay57ZSe5f6Gpx7J2" +
+	"MXAsi7EqSp09b/MirKSyJfnfEEgeDjl8FgDAfvewP03zZ+AJ0m9aFRM8eEHBDRKjfcreDXnZdQuAxXpT2NRJ7xl3UkLBhuVGU16gZiGOgZm" +
+	"rSbRdqkILuL/yYoSXHHkl9KXgqNu3PB8oRg0geC5vFmLjad6mUyTKLmF3OtraWDIfACyXqmephaDABawfpi6tqqBZytfQMqOz6S09iWXhkt" +
+	"rRaB8Xz4Yi/8gyABDm5NVe6qq/3VzPrcjELWrebVuyY2T7ar4zQyybUCtsQ5Es1FGaZVrRVQwAgHGW2ZCRZshI5bGQi7HesyE972pOSeMM0" +
+	"dSktlzxRdrlqb3Osa6CCS8IJoQQQgBAbTAa5l5epO34rJszibJI8rxLfGzcp1dRosutGeb2VDNgqYrwTiPNsLxXiPi3dz7LiS1WBRBDBOnqEj" +
+	"yy3aQb+/bLiJzz9dIkscVBBLxMfSEac7kO4Fpkngi0ruNBeSOal+u8jgOuqPz12nryMLCniEjtOOOmpt+KEIqsEdocJjYXwrh9OZqWJQyPCTo67" +
+	"LNS/TdxLAv6R5ZNK9npEjbYdT33gRo4o5oTqR34R+OmaSzDBWsAIPhuRcgyoteNi9gF0KzNYWVItPf2TLoXEg+7isNC7uJkgo1iQWOfRSP9NR" +
+	"11RtbZZ3OMG/VhL6jvx+J1m87+RCfJChAtEBQkSBX2PnSiihc/Twh3j0h7qdYQAoRVsRGmq7HU2QRbaxVGa1D6nIOqaIWRjyRZpHMQKWKpZM5fe" +
+	"A+lzC4ZFultV8S6T0mzQGhQohi5I8iw+CsqBSxhFMuwyLgSwbghGb0AiIKkSDmGZVmJSiKihsiyOAUs70UkywooYP0bii9GdH4sfr1UNysd3fU" +
+	"yLLMQN+rsmo3grHl9VNJHbbwxoa47Vw5gupIqrZcjPh9R4Nye3nRDk199V+aetmvVtDRE8/+cbgAAgMIWGb3UA0MGLE9SCbWX670TDy" +
+	"1y98c3D27eppUjsZ6fql3jcd5rUe7+ZIlLNQny3Rd+E5Tct3WVhTM5RBCEdiEK0b6B+/ca2gYU393nFj/n1AygRQxPIUA043M42u85+z2S" +
+	"nssKrPl8Mx76NL3E6eXc3be7OD+H4WHbJkKI8AU8irbITQjZ+0hQcPEgId/Fn/pl9crKH02+5o2b9T/eMx7pKoskYgAAAABJRU5ErkJggg=="
+
+func gopherPNG() io.Reader { return base64.NewDecoder(base64.StdEncoding, strings.NewReader(gopher)) }
+func gopherPNGBytes() []byte {
+	img, _ := io.ReadAll(gopherPNG())
+	return img
+}
+
+func TestRPC_imgLoadHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	ri := image.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	// save
+	id := "test_img"
+	err := ri.Save(id, gopherPNGBytes())
+	assert.NoError(t, err)
+
+	// load
+	img, err := ri.Load(id)
+	assert.NoError(t, err)
+	assert.Equal(t, 1462, len(img))
+	assert.Equal(t, gopherPNGBytes(), img)
+
+	// commit
+	err = ri.Commit(id)
+	assert.NoError(t, err)
+
+	// load after commit
+	img, err = ri.Load(id)
+	assert.NoError(t, err)
+	assert.Equal(t, 1462, len(img))
+	assert.Equal(t, gopherPNGBytes(), img)
+
+	// cleanup
+	err = ri.Cleanup(context.TODO(), time.Second)
+	assert.NoError(t, err)
+
+	// load after cleanup
+	img, err = ri.Load(id)
+	assert.NoError(t, err)
+	assert.Equal(t, 1462, len(img))
+	assert.Equal(t, gopherPNGBytes(), img)
+}
+
+func TestRPC_imgCommitHndlFail(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	ri := image.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+	err := ri.Commit("test_id")
+	assert.EqualError(t, err, "failed to commit test_id, not found in staging")
+}
+
+func TestRPC_imgCleanupHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	ri := image.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+
+	// save
+	id := "test_img"
+	err := ri.Save(id, gopherPNGBytes())
+	assert.NoError(t, err)
+
+	// load
+	img, err := ri.Load(id)
+	assert.NoError(t, err)
+	assert.Equal(t, 1462, len(img))
+	assert.Equal(t, gopherPNGBytes(), img)
+
+	// wait for image to expire
+	time.Sleep(time.Millisecond * 50)
+	// reset the time to cleanup
+	err = ri.ResetCleanupTimer(id)
+	assert.NoError(t, err)
+
+	// cleanup, should not affect the new image
+	err = ri.Cleanup(context.TODO(), time.Millisecond*45)
+	assert.NoError(t, err)
+
+	// load after cleanup should succeed
+	_, err = ri.Load(id)
+	assert.NoError(t, err, "image is still on staging because it's cleanup timer was reset")
+
+	// cleanup with short TTL, should remove the image from staging
+	err = ri.Cleanup(context.TODO(), time.Nanosecond)
+	assert.NoError(t, err)
+
+	// load after cleanup should fail
+	_, err = ri.Load(id)
+	assert.EqualError(t, err, "image test_img not found")
+}
+
+func TestRPC_imgInfoHndl(t *testing.T) {
+	port, teardown := prepTestStore(t)
+	defer teardown()
+	api := fmt.Sprintf("http://localhost:%d/test", port)
+
+	ri := image.RPC{Client: jrpc.Client{API: api, Client: http.Client{Timeout: 1 * time.Second}}}
+
+	// get info on empty storage, should be zero
+	info, err := ri.Info()
+	assert.NoError(t, err)
+	assert.True(t, info.FirstStagingImageTS.IsZero())
+
+	// save
+	err = ri.Save("test_img", gopherPNGBytes())
+	assert.NoError(t, err)
+
+	// get info after saving, should be non-zero
+	info, err = ri.Info()
+	assert.NoError(t, err)
+	assert.False(t, info.FirstStagingImageTS.IsZero())
+}

backend/_example/memory_store/server/rpc.go

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2020 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package server
+
+import (
+	"github.com/go-pkgz/jrpc"
+
+	"github.com/umputun/remark42/backend/app/store/admin"
+	"github.com/umputun/remark42/backend/app/store/engine"
+	"github.com/umputun/remark42/backend/app/store/image"
+)
+
+// RPC handler wraps both engine and remote server and implements all handlers for data store and admin store
+// Note: this file can be used as-is in any custom jrpc plugin
+type RPC struct {
+	*jrpc.Server
+	eng engine.Interface
+	adm admin.Store
+	img image.Store
+}
+
+// NewRPC makes RPC instance and register handlers
+func NewRPC(e engine.Interface, a admin.Store, i image.Store, r *jrpc.Server) *RPC {
+	res := &RPC{eng: e, adm: a, img: i, Server: r}
+	res.addHandlers()
+	return res
+}
+
+func (s *RPC) addHandlers() {
+	// data store handlers
+	s.Group("store", jrpc.HandlersGroup{
+		"create":      s.createHndl,
+		"find":        s.findHndl,
+		"get":         s.getHndl,
+		"update":      s.updateHndl,
+		"count":       s.countHndl,
+		"info":        s.infoHndl,
+		"flag":        s.flagHndl,
+		"list_flags":  s.listFlagsHndl,
+		"user_detail": s.userDetailHndl,
+		"delete":      s.deleteHndl,
+		"close":       s.closeHndl,
+	})
+
+	// admin store handlers
+	s.Group("admin", jrpc.HandlersGroup{
+		"key":     s.admKeyHndl,
+		"admins":  s.admAdminsHndl,
+		"email":   s.admEmailHndl,
+		"enabled": s.admEnabledHndl,
+		"event":   s.admEventHndl,
+	})
+
+	// image store handlers
+	s.Group("image", jrpc.HandlersGroup{
+		"save_with_id":        s.imgSaveWithIDHndl,
+		"reset_cleanup_timer": s.imgResetClnTimerHndl,
+		"load":                s.imgLoadHndl,
+		"commit":              s.imgCommitHndl,
+		"cleanup":             s.imgCleanupHndl,
+		"info":                s.imgInfoHndl,
+	})
+}

backend/_example/memory_store/server/rpc_test.go

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2020 Umputun. All rights reserved.
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file.
+ */
+
+package server
+
+import (
+	"fmt"
+	"math/rand"
+	"net"
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/go-pkgz/jrpc"
+	"github.com/stretchr/testify/require"
+
+	"github.com/umputun/remark42/memory_store/accessor"
+)
+
+func chooseRandomUnusedPort() (port int) {
+	for i := 0; i < 10; i++ {
+		port = 40000 + int(rand.Int31n(10000))
+		if ln, err := net.Listen("tcp", fmt.Sprintf(":%d", port)); err == nil {
+			_ = ln.Close()
+			break
+		}
+	}
+	return port
+}
+
+func waitForHTTPServerStart(port int) {
+	// wait for up to 3 seconds for server to start before returning it
+	client := http.Client{Timeout: time.Second}
+	for i := 0; i < 300; i++ {
+		time.Sleep(time.Millisecond * 10)
+		if resp, err := client.Get(fmt.Sprintf("http://localhost:%d", port)); err == nil {
+			_ = resp.Body.Close()
+			return
+		}
+	}
+}
+
+func prepTestStore(t *testing.T) (port int, teardown func()) {
+	mg := accessor.NewMemData()
+	adm := accessor.NewMemAdminStore("secret")
+	img := accessor.NewMemImageStore()
+	s := NewRPC(mg, adm, img, &jrpc.Server{API: "/test", Logger: jrpc.NoOpLogger})
+
+	admRec := accessor.AdminRec{
+		SiteID:  "test-site",
+		IDs:     []string{"id1", "id2"},
+		Email:   "admin@example.com",
+		Enabled: true,
+	}
+	adm.Set("test-site", admRec)
+
+	admRecDisabled := admRec
+	admRecDisabled.Enabled = false
+	adm.Set("test-site-disabled", admRecDisabled)
+
+	port = chooseRandomUnusedPort()
+	go func() {
+		_ = s.Run(port)
+	}()
+
+	waitForHTTPServerStart(port)
+
+	return port, func() {
+		require.NoError(t, s.Shutdown())
+	}
+}

backend/app/cmd/avatar.go

@@ -2,14 +2,12 @@ package cmd
 
 import (
 	"path"
-	"time"
 
-	bolt "github.com/coreos/bbolt"
 	log "github.com/go-pkgz/lgr"
 	"github.com/pkg/errors"
+	bolt "go.etcd.io/bbolt"
 
 	"github.com/go-pkgz/auth/avatar"
-	"github.com/go-pkgz/mongo"
 )
 
 // AvatarCommand set of flags and command for avatar migration
@@ -18,7 +16,6 @@ import (
 type AvatarCommand struct {
 	AvatarSrc AvatarGroup `group:"src" namespace:"src"`
 	AvatarDst AvatarGroup `group:"dst" namespace:"dst"`
-	Mongo     MongoGroup  `group:"mongo" namespace:"mongo" env-namespace:"MONGO"`
 
 	migrator AvatarMigrator
 	CommonOpts
@@ -37,7 +34,7 @@ func (a avatarMigrator) Migrate(dst, src avatar.Store) (int, error) {
 }
 
 // Execute runs  with AvatarCommand parameters, entry point for "avatar" command
-func (ac *AvatarCommand) Execute(args []string) error {
+func (ac *AvatarCommand) Execute(_ []string) error {
 	log.Printf("[INFO] migrate avatars from %s to %s", ac.AvatarSrc.Type, ac.AvatarDst.Type)
 
 	src, err := ac.makeAvatarStore(ac.AvatarSrc)
@@ -75,28 +72,14 @@ func (ac *AvatarCommand) makeAvatarStore(gr AvatarGroup) (avatar.Store, error) {
 	switch gr.Type {
 	case "fs":
 		if err := makeDirs(gr.FS.Path); err != nil {
-			return nil, err
+			return nil, errors.Wrap(err, "failed to create avatar store")
 		}
 		return avatar.NewLocalFS(gr.FS.Path), nil
-	case "mongo":
-		mgServer, err := ac.makeMongo()
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to create mongo server")
-		}
-		conn := mongo.NewConnection(mgServer, ac.Mongo.DB, "")
-		return avatar.NewGridFS(conn), nil
 	case "bolt":
 		if err := makeDirs(path.Dir(gr.Bolt.File)); err != nil {
-			return nil, err
+			return nil, errors.Wrap(err, "failed to create avatar store")
 		}
 		return avatar.NewBoltDB(gr.Bolt.File, bolt.Options{})
 	}
 	return nil, errors.Errorf("unsupported avatar store type %s", gr.Type)
 }
-
-func (ac *AvatarCommand) makeMongo() (result *mongo.Server, err error) {
-	if ac.Mongo.URL == "" {
-		return nil, errors.New("no mongo URL provided")
-	}
-	return mongo.NewServerWithURL(ac.Mongo.URL, 10*time.Second)
-}

backend/app/cmd/avatar_test.go

@@ -6,39 +6,22 @@ import (
 	"testing"
 
 	"github.com/go-pkgz/auth/avatar"
-	flags "github.com/jessevdk/go-flags"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"github.com/umputun/go-flags"
 )
 
 func TestAvatar_Execute(t *testing.T) {
 
-	mongoURL := os.Getenv("MONGO_TEST")
-	if mongoURL == "" {
-		mongoURL = "mongodb://localhost:27017/test"
-	}
-	if mongoURL == "skip" {
-		t.Skip("skip mongo app test")
-	}
 	defer os.RemoveAll("/tmp/ava-test")
 
-	// from fs to mongo
+	// from fs to bolt
 	cmd := AvatarCommand{migrator: &avatarMigratorMock{retCount: 100}}
 	cmd.SetCommon(CommonOpts{RemarkURL: "", SharedSecret: "123456"})
 	p := flags.NewParser(&cmd, flags.Default)
-	_, err := p.ParseArgs([]string{"--src.type=fs", "--src.fs.path=/tmp/ava-test", "--dst.type=mongo",
-		"--mongo.url=" + mongoURL, "--mongo.db=test_remark"})
-	require.Nil(t, err)
-	err = cmd.Execute(nil)
-	assert.NoError(t, err)
-
-	// from fs to bolt
-	cmd = AvatarCommand{migrator: &avatarMigratorMock{retCount: 100}}
-	cmd.SetCommon(CommonOpts{RemarkURL: "", SharedSecret: "123456"})
-	p = flags.NewParser(&cmd, flags.Default)
-	_, err = p.ParseArgs([]string{"--src.type=fs", "--src.fs.path=/tmp/ava-test", "--dst.type=bolt",
+	_, err := p.ParseArgs([]string{"--src.type=fs", "--src.fs.path=/tmp/ava-test", "--dst.type=bolt",
 		"--dst.bolt.file=/tmp/ava-test.db"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	assert.NoError(t, err)
 
@@ -46,9 +29,9 @@ func TestAvatar_Execute(t *testing.T) {
 	cmd = AvatarCommand{migrator: &avatarMigratorMock{retCount: 0, retError: errors.New("failed blah")}}
 	cmd.SetCommon(CommonOpts{RemarkURL: "", SharedSecret: "123456"})
 	p = flags.NewParser(&cmd, flags.Default)
-	_, err = p.ParseArgs([]string{"--src.type=fs", "--src.fs.path=/tmp/ava-test", "--dst.type=mongo",
-		"--mongo.url=" + mongoURL, "--mongo.db=test_remark"})
-	require.Nil(t, err)
+	_, err = p.ParseArgs([]string{"--src.type=fs", "--src.fs.path=/tmp/ava-test", "--dst.type=bolt",
+		"--dst.bolt.file=/tmp/ava-test2.db"})
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	assert.Error(t, err, "failed blah")
 }
@@ -59,7 +42,7 @@ type avatarMigratorMock struct {
 	retCount int
 }
 
-func (a *avatarMigratorMock) Migrate(dst, src avatar.Store) (int, error) {
+func (a *avatarMigratorMock) Migrate(_, _ avatar.Store) (int, error) {
 	a.called++
 	return a.retCount, a.retError
 }

backend/app/cmd/backup.go

@@ -24,7 +24,7 @@ type BackupCommand struct {
 }
 
 // Execute runs export with ExportCommand parameters, entry point for "export" command
-func (ec *BackupCommand) Execute(args []string) error {
+func (ec *BackupCommand) Execute(_ []string) error {
 	log.Printf("[INFO] export to %s, site %s", ec.ExportPath, ec.Site)
 	resetEnv("SECRET", "ADMIN_PASSWD")
 
@@ -41,7 +41,7 @@ func (ec *BackupCommand) Execute(args []string) error {
 	ctx, cancel := context.WithTimeout(context.Background(), ec.Timeout)
 	defer cancel()
 	exportURL := fmt.Sprintf("%s/api/v1/admin/export?mode=file&site=%s", ec.RemarkURL, ec.Site)
-	req, err := http.NewRequest(http.MethodGet, exportURL, nil)
+	req, err := http.NewRequest(http.MethodGet, exportURL, http.NoBody)
 	if err != nil {
 		return errors.Wrapf(err, "can't make export request for %s", exportURL)
 	}
@@ -66,7 +66,7 @@ func (ec *BackupCommand) Execute(args []string) error {
 	if err != nil {
 		return errors.Wrapf(err, "can't create backup file %s", fname)
 	}
-	defer func() {
+	defer func() { //nolint:gosec // false positive on defer without error check when it's checked here
 		if err = fh.Close(); err != nil {
 			log.Printf("[WARN] failed to close file %s, %s", fh.Name(), err)
 		}

backend/app/cmd/backup_test.go

@@ -2,13 +2,13 @@ package cmd
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"os"
 	"testing"
 
-	flags "github.com/jessevdk/go-flags"
+	"github.com/umputun/go-flags"
+
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -25,13 +25,13 @@ func TestBackup_Execute(t *testing.T) {
 	cmd.SetCommon(CommonOpts{RemarkURL: ts.URL, SharedSecret: "123456"})
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--site=remark", "--path=/tmp", "--file={{.SITE}}-test.export", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	assert.NoError(t, err)
 	defer os.Remove("/tmp/remark-test.export")
 
-	data, err := ioutil.ReadFile("/tmp/remark-test.export")
-	require.Nil(t, err)
+	data, err := os.ReadFile("/tmp/remark-test.export")
+	require.NoError(t, err)
 	assert.Equal(t, "blah\nblah2\n12345678\n", string(data))
 }
 
@@ -49,7 +49,7 @@ func TestBackup_ExecuteFailedStatus(t *testing.T) {
 
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--site=remark", "--path=/tmp", "--file={{.SITE}}-test.export", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	assert.EqualError(t, err, `error response "400 Bad Request", some error`)
 }
@@ -68,7 +68,7 @@ func TestBackup_ExecuteFailedWrite(t *testing.T) {
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--site=remark", "--path=/tmp",
 		"--file=/tmp/no-such-dir/{{.SITE}}-test.export", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	assert.EqualError(t, err, `can't create backup file /tmp/no-such-dir/remark-test.export: open /tmp/no-such-dir/remark-test.export: no such file or directory`)
 }

backend/app/cmd/cleanup.go

@@ -11,7 +11,7 @@ import (
 	log "github.com/go-pkgz/lgr"
 	"github.com/pkg/errors"
 
-	"github.com/umputun/remark/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store"
 )
 
 // CleanupCommand set of flags and command for cleanup
@@ -34,7 +34,7 @@ var (
 
 // Execute runs cleanup with CleanupCommand parameters, entry point for "cleanup" command
 // This command uses provided flags to detect and remove junk comments
-func (cc *CleanupCommand) Execute(args []string) error {
+func (cc *CleanupCommand) Execute(_ []string) error {
 	log.Printf("[INFO] cleanup for site %s", cc.Site)
 
 	posts, err := cc.postsInRange(cc.From, cc.To)
@@ -131,7 +131,8 @@ func (cc *CleanupCommand) postsInRange(fromS, toS string) ([]store.PostInfo, err
 // get all posts via GET /list?site=siteID&limit=50&skip=10
 func (cc *CleanupCommand) listPosts() ([]store.PostInfo, error) {
 	listURL := fmt.Sprintf("%s/api/v1/list?site=%s&limit=10000", cc.RemarkURL, cc.Site)
-	r, err := http.Get(listURL) // nolint
+	client := http.Client{Timeout: 30 * time.Second}
+	r, err := client.Get(listURL)
 	if err != nil {
 		return nil, errors.Wrapf(err, "get request failed for list of posts, site %s", cc.Site)
 	}
@@ -158,7 +159,8 @@ func (cc *CleanupCommand) listComments(postURL string) ([]store.Comment, error)
 
 	// handle 429 error from limiter
 	for {
-		r, err = http.Get(commentsURL) // nolint
+		client := http.Client{Timeout: 30 * time.Second}
+		r, err = client.Get(commentsURL)
 		if err != nil {
 			return nil, errors.Wrapf(err, "get request failed for comments, %s", postURL)
 		}
@@ -191,7 +193,7 @@ func (cc *CleanupCommand) listComments(postURL string) ([]store.Comment, error)
 func (cc *CleanupCommand) deleteComment(c store.Comment) error {
 
 	deleteURL := fmt.Sprintf("%s/api/v1/admin/comment/%s?site=%s&url=%s&format=plain", cc.RemarkURL, c.ID, cc.Site, c.Locator.URL)
-	req, err := http.NewRequest("DELETE", deleteURL, nil)
+	req, err := http.NewRequest("DELETE", deleteURL, http.NoBody)
 	if err != nil {
 		return errors.Wrapf(err, "failed to make delete request for comment %s, %s", c.ID, c.Locator.URL)
 	}
@@ -213,7 +215,7 @@ func (cc *CleanupCommand) deleteComment(c store.Comment) error {
 func (cc *CleanupCommand) setTitle(c store.Comment) error {
 
 	titleURL := fmt.Sprintf("%s/api/v1/admin/title/%s?site=%s&url=%s&format=plain", cc.RemarkURL, c.ID, cc.Site, c.Locator.URL)
-	req, err := http.NewRequest("PUT", titleURL, nil)
+	req, err := http.NewRequest("PUT", titleURL, http.NoBody)
 	if err != nil {
 		return errors.Wrapf(err, "failed to make title request for comment %s, %s", c.ID, c.Locator.URL)
 	}
@@ -232,7 +234,7 @@ func (cc *CleanupCommand) setTitle(c store.Comment) error {
 }
 
 // isSpam calculates spam's probability as a score
-func (cc *CleanupCommand) isSpam(comment store.Comment) (bool, float64) {
+func (cc *CleanupCommand) isSpam(comment store.Comment) (isSpam bool, spamScore float64) {
 
 	badWord := func(txt string) float64 {
 		res := 0.0

backend/app/cmd/cleanup_test.go

@@ -9,12 +9,12 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-chi/chi"
-	flags "github.com/jessevdk/go-flags"
+	"github.com/go-chi/chi/v5"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"github.com/umputun/go-flags"
 
-	"github.com/umputun/remark/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store"
 )
 
 type cleanedComments struct {
@@ -46,6 +46,7 @@ func TestCleanup_IsSpam(t *testing.T) {
 	}
 
 	for n, tt := range tbl {
+		tt := tt
 		checkName := fmt.Sprintf("check-%d-%s", n, tt.name)
 		t.Run(checkName, func(t *testing.T) {
 			c := store.Comment{ID: checkName, Text: tt.text, Score: tt.score}
@@ -68,7 +69,7 @@ func TestCleanup_postsInRange(t *testing.T) {
 	cmd.SetCommon(CommonOpts{RemarkURL: ts.URL, SharedSecret: "123456"})
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--site=remark", "--bword=bad1", "--bword=bad2", "--buser=bu_", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	posts, err := cmd.postsInRange("20181218", "20181219")
 	assert.NoError(t, err)
 	assert.Equal(t, 2, len(posts))
@@ -78,7 +79,7 @@ func TestCleanup_postsInRange(t *testing.T) {
 	assert.Equal(t, 3, len(posts))
 
 	_, err = cmd.postsInRange("xxx", "yyy")
-	assert.NotNil(t, err)
+	assert.Error(t, err)
 }
 
 func TestCleanup_listComments(t *testing.T) {
@@ -91,7 +92,7 @@ func TestCleanup_listComments(t *testing.T) {
 	cmd.SetCommon(CommonOpts{RemarkURL: ts.URL, SharedSecret: "123456"})
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--site=remark", "--bword=bad1", "--bword=bad2", "--buser=bu_", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 
 	comments, err := cmd.listComments("http://test.com/post1")
 	assert.NoError(t, err)
@@ -118,7 +119,7 @@ func TestCleanup_ExecuteSpam(t *testing.T) {
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--site=remark", "--bword=bad1", "--bword=bad2", "--buser=bu_",
 		"--from=20181217", "--to=20181218", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	assert.NoError(t, err)
 	t.Logf("deleted %+v", cleaned.ids)
@@ -136,7 +137,7 @@ func TestCleanup_ExecuteTitle(t *testing.T) {
 	cmd.SetCommon(CommonOpts{RemarkURL: ts.URL, SharedSecret: "123456"})
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--site=remark", "--title", "--from=20181217", "--to=20181218", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	assert.NoError(t, err)
 	t.Logf("set titles for %+v", titledComments.ids)
@@ -144,7 +145,7 @@ func TestCleanup_ExecuteTitle(t *testing.T) {
 }
 
 func cleanupRoutes(t *testing.T, r *chi.Mux, c *cleanedComments) {
-	r.HandleFunc("/api/v1/list", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	r.HandleFunc("/api/v1/list", func(w http.ResponseWriter, r *http.Request) {
 		require.Equal(t, "GET", r.Method)
 		require.Equal(t, "site=remark&limit=10000", r.URL.RawQuery)
 		list := []store.PostInfo{
@@ -165,9 +166,9 @@ func cleanupRoutes(t *testing.T, r *chi.Mux, c *cleanedComments) {
 			},
 		}
 		require.NoError(t, json.NewEncoder(w).Encode(list))
-	}))
+	})
 
-	r.HandleFunc("/api/v1/find", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	r.HandleFunc("/api/v1/find", func(w http.ResponseWriter, r *http.Request) {
 		require.Equal(t, "GET", r.Method)
 		require.Equal(t, "remark", r.URL.Query().Get("site"))
 		require.Equal(t, "plain", r.URL.Query().Get("format"))
@@ -193,22 +194,22 @@ func cleanupRoutes(t *testing.T, r *chi.Mux, c *cleanedComments) {
 		}
 
 		require.NoError(t, json.NewEncoder(w).Encode(commentsWithInfo))
-	}))
+	})
 
-	r.HandleFunc("/api/v1/admin/comment/{id}", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	r.HandleFunc("/api/v1/admin/comment/{id}", func(w http.ResponseWriter, r *http.Request) {
 		require.Equal(t, "DELETE", r.Method)
 		t.Log("delete ", r.URL.Path)
 		c.lock.Lock()
 		c.ids = append(c.ids, r.URL.Path)
 		c.lock.Unlock()
-	}))
+	})
 
-	r.HandleFunc("/api/v1/admin/title/{id}", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	r.HandleFunc("/api/v1/admin/title/{id}", func(w http.ResponseWriter, r *http.Request) {
 		require.Equal(t, "PUT", r.Method)
 		t.Log("title for ", r.URL.Path)
 		c.lock.Lock()
 		c.ids = append(c.ids, r.URL.Path)
 		c.lock.Unlock()
-	}))
+	})
 
 }

backend/app/cmd/cmd.go

@@ -4,7 +4,7 @@ package cmd
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -21,6 +21,7 @@ import (
 type CommonOptionsCommander interface {
 	SetCommon(commonOpts CommonOpts)
 	Execute(args []string) error
+	HandleDeprecatedFlags() []DeprecatedFlag
 }
 
 // CommonOpts sets externally from main, shared across all commands
@@ -30,6 +31,13 @@ type CommonOpts struct {
 	Revision     string
 }
 
+// DeprecatedFlag contains information about deprecated option
+type DeprecatedFlag struct {
+	Old     string
+	New     string
+	Version string
+}
+
 // SetCommon satisfies CommonOptionsCommander interface and sets common option fields
 // The method called by main for each command
 func (c *CommonOpts) SetCommon(commonOpts CommonOpts) {
@@ -38,6 +46,9 @@ func (c *CommonOpts) SetCommon(commonOpts CommonOpts) {
 	c.Revision = commonOpts.Revision
 }
 
+// HandleDeprecatedFlags sets new flags from deprecated and returns their list
+func (c *CommonOpts) HandleDeprecatedFlags() []DeprecatedFlag { return nil }
+
 // fileParser used to convert template strings like blah-{{.SITE}}-{{.YYYYMMDD}} the final format
 type fileParser struct {
 	site string
@@ -92,7 +103,7 @@ func resetEnv(envs ...string) {
 
 // responseError returns error with status and response body
 func responseError(resp *http.Response) error {
-	body, e := ioutil.ReadAll(resp.Body)
+	body, e := io.ReadAll(resp.Body)
 	if e != nil {
 		body = []byte("")
 	}
@@ -102,7 +113,7 @@ func responseError(resp *http.Response) error {
 // mkdir -p for all dirs
 func makeDirs(dirs ...string) error {
 	for _, dir := range dirs {
-		if err := os.MkdirAll(dir, 0700); err != nil { // If path is already a directory, MkdirAll does nothing
+		if err := os.MkdirAll(dir, 0o700); err != nil { // If path is already a directory, MkdirAll does nothing
 			return errors.Wrapf(err, "can't make directory %s", dir)
 		}
 	}

backend/app/cmd/cmd_test.go

@@ -31,7 +31,7 @@ func TestExport_ParseFileName(t *testing.T) {
 	for i, tt := range tbl {
 		r, err := tt.p.parse(now)
 		if tt.err {
-			assert.NotNil(t, err)
+			assert.Error(t, err)
 			continue
 		}
 		assert.Equal(t, tt.res, r, "check #%d", i)

backend/app/cmd/import.go

@@ -5,7 +5,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"strings"
@@ -18,7 +17,7 @@ import (
 // ImportCommand set of flags and command for import
 type ImportCommand struct {
 	InputFile   string        `short:"f" long:"file" description:"input file name" required:"true"`
-	Provider    string        `short:"p" long:"provider" default:"disqus" choice:"disqus" choice:"wordpress" description:"import format"`
+	Provider    string        `short:"p" long:"provider" default:"disqus" choice:"disqus" choice:"wordpress" choice:"commento" description:"import format"` //nolint
 	Site        string        `short:"s" long:"site" env:"SITE" default:"remark" description:"site name"`
 	Timeout     time.Duration `long:"timeout" default:"15m" description:"import timeout"`
 	AdminPasswd string        `long:"admin-passwd" env:"ADMIN_PASSWD" required:"true" description:"admin basic auth password"`
@@ -26,7 +25,7 @@ type ImportCommand struct {
 }
 
 // Execute runs import with ImportCommand parameters, entry point for "import" command
-func (ic *ImportCommand) Execute(args []string) error {
+func (ic *ImportCommand) Execute(_ []string) error {
 	log.Printf("[INFO] import %s (%s), site %s", ic.InputFile, ic.Provider, ic.Site)
 	resetEnv("SECRET", "ADMIN_PASSWD")
 
@@ -58,7 +57,7 @@ func (ic *ImportCommand) Execute(args []string) error {
 		return responseError(resp)
 	}
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return errors.Wrap(err, "can't get response from importer")
 	}
@@ -69,7 +68,7 @@ func (ic *ImportCommand) Execute(args []string) error {
 
 // reader returns reader for file. For .gz file wraps with gunzip
 func (ic *ImportCommand) reader(inp string) (reader io.Reader, err error) {
-	inpFile, err := os.Open(inp)
+	inpFile, err := os.Open(inp) // nolint
 	if err != nil {
 		return nil, errors.Wrapf(err, "import failed, can't open %s", inp)
 	}

backend/app/cmd/import_test.go

@@ -2,15 +2,15 @@ package cmd
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/http/httptest"
-	"strings"
 	"testing"
 	"time"
 
 	log "github.com/go-pkgz/lgr"
-	flags "github.com/jessevdk/go-flags"
+	"github.com/umputun/go-flags"
+
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -20,8 +20,8 @@ func TestImport_Execute(t *testing.T) {
 	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		assert.Equal(t, r.URL.Path, "/api/v1/admin/import")
 		assert.Equal(t, "POST", r.Method)
-		body, err := ioutil.ReadAll(r.Body)
-		assert.Nil(t, err)
+		body, err := io.ReadAll(r.Body)
+		assert.NoError(t, err)
 		assert.Equal(t, "blah\nblah2\n12345678\n", string(body))
 
 		fmt.Fprintln(w, "some response")
@@ -34,7 +34,7 @@ func TestImport_Execute(t *testing.T) {
 
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--site=remark", "--file=testdata/import.txt", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	assert.NoError(t, err)
 
@@ -43,7 +43,7 @@ func TestImport_Execute(t *testing.T) {
 
 	p = flags.NewParser(&cmd, flags.Default)
 	_, err = p.ParseArgs([]string{"--site=remark", "--file=testdata/import.txt.gz", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	assert.NoError(t, err)
 }
@@ -61,21 +61,21 @@ func TestImport_ExecuteFailed(t *testing.T) {
 	cmd.SetCommon(CommonOpts{RemarkURL: ts.URL, SharedSecret: "123456"})
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--site=remark", "--file=testdata/import-no.txt", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	t.Log(err)
-	assert.NotNil(t, err, "fail on no such file")
-	assert.True(t, strings.Contains(err.Error(), "no such file or directory"))
+	assert.Error(t, err, "fail on no such file")
+	assert.Contains(t, err.Error(), "no such file or directory")
 
 	cmd = ImportCommand{}
 	cmd.SetCommon(CommonOpts{RemarkURL: "http://127.0.0.1:12345", SharedSecret: "123456"})
 	p = flags.NewParser(&cmd, flags.Default)
 	_, err = p.ParseArgs([]string{"--site=remark", "--file=testdata/import.txt", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	t.Log(err)
-	assert.NotNil(t, err, "fail on connection refused")
-	assert.True(t, strings.Contains(err.Error(), "connection refused"))
+	assert.Error(t, err, "fail on connection refused")
+	assert.Contains(t, err.Error(), "connection refused")
 
 	ts2 := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		log.Printf("%+v", r)
@@ -87,18 +87,18 @@ func TestImport_ExecuteFailed(t *testing.T) {
 	cmd.SetCommon(CommonOpts{RemarkURL: ts2.URL, SharedSecret: "123456"})
 	p = flags.NewParser(&cmd, flags.Default)
 	_, err = p.ParseArgs([]string{"--site=remark", "--file=testdata/import.txt", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	t.Log(err)
-	assert.NotNil(t, err)
+	assert.Error(t, err)
 }
 
 func TestImport_ExecuteTimeout(t *testing.T) {
 	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		assert.Equal(t, r.URL.Path, "/api/v1/admin/import")
 		assert.Equal(t, "POST", r.Method)
-		body, err := ioutil.ReadAll(r.Body)
-		assert.Nil(t, err)
+		body, err := io.ReadAll(r.Body)
+		assert.NoError(t, err)
 		assert.Equal(t, "blah\nblah2\n12345678\n", string(body))
 		time.Sleep(500 * time.Millisecond)
 		fmt.Fprintln(w, "some response")
@@ -112,8 +112,8 @@ func TestImport_ExecuteTimeout(t *testing.T) {
 
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--site=remark", "--file=testdata/import.txt", "--timeout=300ms", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
-	assert.NotNil(t, err)
-	assert.True(t, strings.Contains(err.Error(), "deadline exceeded"))
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "deadline exceeded")
 }

backend/app/cmd/remap.go

@@ -0,0 +1,65 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"time"
+
+	log "github.com/go-pkgz/lgr"
+	"github.com/pkg/errors"
+)
+
+// RemapCommand set of flags and command for change linkage between comments to
+// different urls based on given rules (input file)
+type RemapCommand struct {
+	Site        string        `short:"s" long:"site" env:"SITE" default:"remark" description:"site name"`
+	InputFile   string        `short:"f" long:"file" description:"input file name" required:"true"`
+	AdminPasswd string        `long:"admin-passwd" env:"ADMIN_PASSWD" required:"true" description:"admin basic auth password"`
+	Timeout     time.Duration `long:"timeout" default:"15m" description:"remap timeout"`
+	CommonOpts
+}
+
+// Execute runs (re)mapper with RemapCommand parameters, entry point for "remap" command
+func (rc *RemapCommand) Execute(_ []string) error {
+	log.Printf("[INFO] start remap, site %s, file with rules %s", rc.Site, rc.InputFile)
+	resetEnv("SECRET", "ADMIN_PASSWD")
+
+	rulesReader, err := os.Open(rc.InputFile)
+	if err != nil {
+		return errors.Wrapf(err, "cant open file %s", rc.InputFile)
+	}
+
+	client := http.Client{}
+	ctx, cancel := context.WithTimeout(context.Background(), rc.Timeout)
+	defer cancel()
+	remapURL := fmt.Sprintf("%s/api/v1/admin/remap?site=%s", rc.RemarkURL, rc.Site)
+	req, err := http.NewRequest(http.MethodPost, remapURL, rulesReader)
+	if err != nil {
+		return errors.Wrapf(err, "can't make remap request for %s", remapURL)
+	}
+	req.SetBasicAuth("admin", rc.AdminPasswd)
+
+	resp, err := client.Do(req.WithContext(ctx))
+	if err != nil {
+		return errors.Wrapf(err, "request failed for %s", remapURL)
+	}
+	defer func() {
+		if err = resp.Body.Close(); err != nil {
+			log.Printf("[WARN] failed to close response, %s", err)
+		}
+	}()
+	if resp.StatusCode >= 300 {
+		return responseError(resp)
+	}
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return errors.Wrap(err, "can't get response")
+	}
+
+	log.Printf("[INFO] completed, status=%d, %s", resp.StatusCode, string(body))
+	return nil
+}

backend/app/cmd/remap_test.go

@@ -0,0 +1,37 @@
+package cmd
+
+import (
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/umputun/go-flags"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestRemap_Execute(t *testing.T) {
+
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		assert.Equal(t, r.URL.Path, "/api/v1/admin/remap")
+		assert.Equal(t, "POST", r.Method)
+		assert.Equal(t, "remark", r.URL.Query().Get("site"))
+		body, err := io.ReadAll(r.Body)
+		assert.NoError(t, err)
+		assert.Equal(t, "http://oldsite.com* https://newsite.com*\nhttp://oldsite.com/from-old-page/1 https://newsite.com/to-new-page/1", string(body))
+
+		w.WriteHeader(202)
+	}))
+	defer ts.Close()
+
+	cmd := RemapCommand{}
+	cmd.SetCommon(CommonOpts{RemarkURL: ts.URL, SharedSecret: "123456"})
+
+	p := flags.NewParser(&cmd, flags.Default)
+	_, err := p.ParseArgs([]string{"--site=remark", "--file=testdata/remap_urls.txt", "--admin-passwd=secret"})
+	require.NoError(t, err)
+	err = cmd.Execute(nil)
+	assert.NoError(t, err)
+}

backend/app/cmd/restore_test.go

@@ -2,12 +2,13 @@ package cmd
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 
-	flags "github.com/jessevdk/go-flags"
+	"github.com/umputun/go-flags"
+
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -18,8 +19,8 @@ func TestRestore_Execute(t *testing.T) {
 		assert.Equal(t, r.URL.Path, "/api/v1/admin/import")
 		assert.Equal(t, "POST", r.Method)
 		assert.Equal(t, "native", r.URL.Query().Get("provider"))
-		body, err := ioutil.ReadAll(r.Body)
-		assert.Nil(t, err)
+		body, err := io.ReadAll(r.Body)
+		assert.NoError(t, err)
 		assert.Equal(t, "blah\nblah2\n12345678\n", string(body))
 
 		fmt.Fprintln(w, "some response")
@@ -32,7 +33,7 @@ func TestRestore_Execute(t *testing.T) {
 
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--site=remark", "--path=testdata", "--file=import.txt", "--admin-passwd=secret"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	err = cmd.Execute(nil)
 	assert.NoError(t, err)
 }

backend/app/cmd/server_test.go

@@ -4,65 +4,70 @@ import (
 	"context"
 	"crypto/tls"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"math/rand"
+	"net"
 	"net/http"
 	"os"
+	"strconv"
 	"strings"
 	"syscall"
 	"testing"
 	"time"
 
-	"github.com/dgrijalva/jwt-go"
-	"github.com/globalsign/mgo"
 	"github.com/go-pkgz/auth/token"
-	log "github.com/go-pkgz/lgr"
-	"github.com/go-pkgz/mongo"
-	"github.com/jessevdk/go-flags"
+	"github.com/golang-jwt/jwt"
+	"github.com/umputun/go-flags"
+	"go.uber.org/goleak"
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
 func TestServerApp(t *testing.T) {
-	port := rand.Intn(40000) + 10000
-	app, ctx := prepServerApp(t, 1500*time.Millisecond, func(o ServerCommand) ServerCommand {
+	port := chooseRandomUnusedPort()
+	app, ctx, cancel := prepServerApp(t, func(o ServerCommand) ServerCommand {
 		o.Port = port
 		return o
 	})
 
 	go func() { _ = app.run(ctx) }()
-	time.Sleep(100 * time.Millisecond) // let server start
+	waitForHTTPServerStart(port)
 
 	// send ping
 	resp, err := http.Get(fmt.Sprintf("http://localhost:%d/api/v1/ping", port))
-	require.Nil(t, err)
+	require.NoError(t, err)
 	defer resp.Body.Close()
 	assert.Equal(t, 200, resp.StatusCode)
-	body, err := ioutil.ReadAll(resp.Body)
-	assert.Nil(t, err)
+	body, err := io.ReadAll(resp.Body)
+	assert.NoError(t, err)
 	assert.Equal(t, "pong", string(body))
 
 	// add comment
-	client := http.Client{Timeout: 5 * time.Second}
+	client := http.Client{Timeout: 10 * time.Second}
+	defer client.CloseIdleConnections()
 	req, err := http.NewRequest("POST", fmt.Sprintf("http://localhost:%d/api/v1/comment", port),
 		strings.NewReader(`{"text": "test 123", "locator":{"url": "https://radio-t.com/blah1", "site": "remark"}}`))
+	require.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
-	require.Nil(t, err)
 	resp, err = client.Do(req)
-	require.Nil(t, err)
+	require.NoError(t, err)
+	defer resp.Body.Close()
 	assert.Equal(t, http.StatusCreated, resp.StatusCode)
-	body, _ = ioutil.ReadAll(resp.Body)
+	body, _ = io.ReadAll(resp.Body)
 	t.Log(string(body))
 
-	assert.Equal(t, "admin@demo.remark42.com", app.dataService.AdminStore.Email(""), "default admin email")
+	email, err := app.dataService.AdminStore.Email("")
+	assert.NoError(t, err)
+	assert.Equal(t, "admin@demo.remark42.com", email, "default admin email")
 
+	cancel()
 	app.Wait()
 }
 
 func TestServerApp_DevMode(t *testing.T) {
-	port := rand.Intn(40000) + 10000
-	app, ctx := prepServerApp(t, 500*time.Millisecond, func(o ServerCommand) ServerCommand {
+	port := chooseRandomUnusedPort()
+	app, ctx, cancel := prepServerApp(t, func(o ServerCommand) ServerCommand {
 		o.Port = port
 		o.AdminPasswd = "password"
 		o.Auth.Dev = true
@@ -70,145 +75,165 @@ func TestServerApp_DevMode(t *testing.T) {
 	})
 
 	go func() { _ = app.run(ctx) }()
-	time.Sleep(100 * time.Millisecond) // let server start
+	waitForHTTPServerStart(port)
 
-	assert.Equal(t, 4+1, len(app.restSrv.Authenticator.Providers()), "extra auth provider")
-	assert.Equal(t, "dev", app.restSrv.Authenticator.Providers()[4].Name(), "dev auth provider")
+	providers := app.restSrv.Authenticator.Providers()
+	require.Equal(t, 9+1, len(providers), "extra auth provider")
+	assert.Equal(t, "dev", providers[len(providers)-2].Name(), "dev auth provider")
 	// send ping
 	resp, err := http.Get(fmt.Sprintf("http://localhost:%d/api/v1/ping", port))
-	require.Nil(t, err)
-	defer resp.Body.Close()
+	require.NoError(t, err)
 	assert.Equal(t, 200, resp.StatusCode)
-	body, err := ioutil.ReadAll(resp.Body)
-	assert.Nil(t, err)
+	body, err := io.ReadAll(resp.Body)
+	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
 	assert.Equal(t, "pong", string(body))
 
+	cancel()
 	app.Wait()
 }
 
 func TestServerApp_AnonMode(t *testing.T) {
-	port := rand.Intn(40000) + 10000
-	app, ctx := prepServerApp(t, 500*time.Millisecond, func(o ServerCommand) ServerCommand {
+	port := chooseRandomUnusedPort()
+	app, ctx, cancel := prepServerApp(t, func(o ServerCommand) ServerCommand {
 		o.Port = port
 		o.Auth.Anonymous = true
 		return o
 	})
 
 	go func() { _ = app.run(ctx) }()
-	time.Sleep(100 * time.Millisecond) // let server start
+	waitForHTTPServerStart(port)
 
-	assert.Equal(t, 4+1, len(app.restSrv.Authenticator.Providers()), "extra auth provider for anon")
-	assert.Equal(t, "anonymous", app.restSrv.Authenticator.Providers()[4].Name(), "anon auth provider")
+	providers := app.restSrv.Authenticator.Providers()
+	require.Equal(t, 9+1, len(providers), "extra auth provider for anon")
+	assert.Equal(t, "anonymous", providers[len(providers)-1].Name(), "anon auth provider")
 
 	// send ping
 	resp, err := http.Get(fmt.Sprintf("http://localhost:%d/api/v1/ping", port))
-	require.Nil(t, err)
+	require.NoError(t, err)
 	defer resp.Body.Close()
-	assert.Equal(t, 200, resp.StatusCode)
-	body, err := ioutil.ReadAll(resp.Body)
-	assert.Nil(t, err)
+	assert.Equal(t, http.StatusOK, resp.StatusCode)
+	body, err := io.ReadAll(resp.Body)
+	assert.NoError(t, err)
 	assert.Equal(t, "pong", string(body))
 
 	// try to login with good name
-	resp, err = http.Get(fmt.Sprintf("http://localhost:%d/auth/anonymous/login?user=blah123&aud=remark42", port))
-	require.Nil(t, err)
+	resp, err = http.Get(fmt.Sprintf("http://localhost:%d/auth/anonymous/login?user=blah123&aud=remark", port))
+	require.NoError(t, err)
 	defer resp.Body.Close()
-	assert.Equal(t, 200, resp.StatusCode)
+	assert.Equal(t, http.StatusOK, resp.StatusCode)
+
+	// try to add a comment as good anonymous
+	client := http.Client{Timeout: 10 * time.Second}
+	defer client.CloseIdleConnections()
+	req, err := http.NewRequest("POST", fmt.Sprintf("http://localhost:%d/api/v1/comment", port),
+		strings.NewReader(`{"text": "test 123", "locator":{"url": "https://radio-t.com/blah1", "site": "remark"}}`))
+	require.NoError(t, err)
+
+	tkn, claims := getAuthFromCookie(t, app, resp)
+	require.NotEmpty(t, tkn)
+	assert.False(t, claims.User.BoolAttr("blocked"), "should not be blocked")
+	req.Header.Add("X-JWT", tkn)
+	resp, err = client.Do(req)
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	assert.Equal(t, http.StatusCreated, resp.StatusCode)
+
+	// try to login with non-latin name
+	resp, err = http.Get(fmt.Sprintf("http://localhost:%d/auth/anonymous/login?user=Раз_Два%20%20Три_34567&aud=remark", port))
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	assert.Equal(t, http.StatusOK, resp.StatusCode)
 
 	// try to login with bad name
-	resp, err = http.Get(fmt.Sprintf("http://localhost:%d/auth/anonymous/login?user=**blah123&aud=remark42", port))
-	require.Nil(t, err)
+	resp, err = http.Get(fmt.Sprintf("http://localhost:%d/auth/anonymous/login?user=**blah123&aud=remark", port))
+	require.NoError(t, err)
 	defer resp.Body.Close()
-	assert.Equal(t, 403, resp.StatusCode)
+	assert.Equal(t, http.StatusForbidden, resp.StatusCode)
 
 	// try to login with short name
-	resp, err = http.Get(fmt.Sprintf("http://localhost:%d/auth/anonymous/login?user=bl%20%20&aud=remark42", port))
-	require.Nil(t, err)
+	resp, err = http.Get(fmt.Sprintf("http://localhost:%d/auth/anonymous/login?user=bl%%20%%20&aud=remark", port))
+	require.NoError(t, err)
 	defer resp.Body.Close()
-	assert.Equal(t, 403, resp.StatusCode)
+	assert.Equal(t, http.StatusForbidden, resp.StatusCode)
 
+	// try to login with name what have space in prefix
+	resp, err = http.Get(fmt.Sprintf("http://localhost:%d/auth/anonymous/login?user=%%20somebody&aud=remark", port))
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	assert.Equal(t, http.StatusForbidden, resp.StatusCode)
+
+	// try to login with name what have space in suffix
+	resp, err = http.Get(fmt.Sprintf("http://localhost:%d/auth/anonymous/login?user=somebody%%20&aud=remark", port))
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	assert.Equal(t, http.StatusForbidden, resp.StatusCode)
+
+	// try to login with long name
+	ln := strings.Repeat("x", 65)
+	resp, err = http.Get(fmt.Sprintf("http://localhost:%d/auth/anonymous/login?user=%s&aud=remark", port, ln))
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	assert.Equal(t, http.StatusForbidden, resp.StatusCode)
+
+	// try to login with admin name
+	resp, err = http.Get(fmt.Sprintf("http://localhost:%d/auth/anonymous/login?user=umpUtun&aud=remark", port))
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	assert.Equal(t, http.StatusOK, resp.StatusCode)
+
+	// try to add a comment as anonymous with admin name
+	client = http.Client{Timeout: 10 * time.Second}
+	req, err = http.NewRequest("POST", fmt.Sprintf("http://localhost:%d/api/v1/comment", port),
+		strings.NewReader(`{"text": "test 123", "locator":{"url": "https://radio-t.com/blah1", "site": "remark"}}`))
+	require.NoError(t, err)
+
+	tkn, claims = getAuthFromCookie(t, app, resp)
+	require.NotEmpty(t, tkn)
+	assert.True(t, claims.User.BoolAttr("blocked"), "should be blocked")
+	req.Header.Add("X-JWT", tkn)
+	resp, err = client.Do(req)
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	assert.Equal(t, http.StatusUnauthorized, resp.StatusCode)
+
+	cancel()
 	app.Wait()
 }
-func TestServerApp_WithMongo(t *testing.T) {
 
-	mongoURL := os.Getenv("MONGO_TEST")
-	if mongoURL == "" {
-		mongoURL = "mongodb://localhost:27017/test"
+func getAuthFromCookie(t *testing.T, app *serverApp, resp *http.Response) (tkn string, claims token.Claims) {
+	var err error
+	for _, c := range resp.Cookies() {
+		if c.Name == "JWT" {
+			tkn = c.Value
+			claims, err = app.restSrv.Authenticator.TokenService().Parse(c.Value)
+			require.NoError(t, err)
+		}
 	}
-	if mongoURL == "skip" {
-		t.Skip("skip mongo app test")
-	}
-
-	opts := ServerCommand{}
-	opts.SetCommon(CommonOpts{RemarkURL: "https://demo.remark42.com", SharedSecret: "123456"})
-
-	// prepare options
-	p := flags.NewParser(&opts, flags.Default)
-	_, err := p.ParseArgs([]string{"--admin-passwd=password", "--cache.type=none", "--store.type=mongo",
-		"--avatar.type=mongo", "--mongo.url=" + mongoURL, "--mongo.db=test_remark", "--port=12345", "--admin.type=mongo"})
-	require.Nil(t, err)
-	opts.Auth.Github.CSEC, opts.Auth.Github.CID = "csec", "cid"
-	opts.BackupLocation, opts.Image.FS.Path = "/tmp", "/tmp"
-
-	// create app
-	app, err := opts.newServerApp()
-	require.Nil(t, err)
-
-	defer func() {
-		s, e := mongo.NewServerWithURL(mongoURL, 10*time.Second)
-		assert.NoError(t, e)
-		conn := mongo.NewConnection(s, "test_remark", "")
-		_ = conn.WithDB(func(dbase *mgo.Database) error {
-			assert.NoError(t, dbase.DropDatabase())
-			return nil
-		})
-	}()
-
-	ctx, cancel := context.WithCancel(context.Background())
-	go func() {
-		time.Sleep(5 * time.Second)
-		log.Print("[TEST] terminate app")
-		cancel()
-	}()
-	go func() { _ = app.run(ctx) }()
-	time.Sleep(100 * time.Millisecond) // let server start
-
-	// send ping
-	resp, err := http.Get("http://localhost:12345/api/v1/ping")
-	require.Nil(t, err)
-	defer resp.Body.Close()
-	assert.Equal(t, 200, resp.StatusCode)
-	body, err := ioutil.ReadAll(resp.Body)
-	assert.Nil(t, err)
-	assert.Equal(t, "pong", string(body))
-
-	app.Wait()
+	return tkn, claims
 }
 
 func TestServerApp_WithSSL(t *testing.T) {
 	opts := ServerCommand{}
-	opts.SetCommon(CommonOpts{RemarkURL: "https://localhost:18443", SharedSecret: "123456"})
+	sslPort := chooseRandomUnusedPort()
+	opts.SetCommon(CommonOpts{RemarkURL: fmt.Sprintf("https://localhost:%d", sslPort), SharedSecret: "123456"})
 
 	// prepare options
 	p := flags.NewParser(&opts, flags.Default)
-	_, err := p.ParseArgs([]string{"--admin-passwd=password", "--port=18080", "--store.bolt.path=/tmp/xyz", "--backup=/tmp",
-		"--avatar.type=bolt", "--avatar.bolt.file=/tmp/ava-test.db", "--notify.type=none",
+	port := chooseRandomUnusedPort()
+	_, err := p.ParseArgs([]string{"--admin-passwd=password", "--port=" + strconv.Itoa(port), "--store.bolt.path=/tmp/xyz", "--backup=/tmp",
+		"--avatar.type=bolt", "--avatar.bolt.file=/tmp/ava-test.db",
 		"--ssl.type=static", "--ssl.cert=testdata/cert.pem", "--ssl.key=testdata/key.pem",
-		"--ssl.port=18443", "--image.fs.path=/tmp"})
-	require.Nil(t, err)
+		"--ssl.port=" + strconv.Itoa(sslPort), "--image.fs.path=/tmp"})
+	require.NoError(t, err)
 
 	// create app
-	app, err := opts.newServerApp()
-	require.Nil(t, err)
+	app, err := opts.newServerApp(context.Background())
+	require.NoError(t, err)
 
 	ctx, cancel := context.WithCancel(context.Background())
-	go func() {
-		time.Sleep(1 * time.Second)
-		log.Print("[TEST] terminate app")
-		cancel()
-	}()
 	go func() { _ = app.run(ctx) }()
-	time.Sleep(100 * time.Millisecond) // let server start
+	waitForHTTPSServerStart(sslPort)
 
 	client := http.Client{
 		// prevent http redirect
@@ -223,21 +248,58 @@ func TestServerApp_WithSSL(t *testing.T) {
 	}
 
 	// check http to https redirect response
-	resp, err := client.Get("http://localhost:18080/blah?param=1")
-	require.Nil(t, err)
+	resp, err := client.Get(fmt.Sprintf("http://localhost:%d/blah?param=1", port))
+	require.NoError(t, err)
 	defer resp.Body.Close()
 	assert.Equal(t, 307, resp.StatusCode)
-	assert.Equal(t, "https://localhost:18443/blah?param=1", resp.Header.Get("Location"))
+	assert.Equal(t, fmt.Sprintf("https://localhost:%d/blah?param=1", sslPort), resp.Header.Get("Location"))
 
 	// check https server
-	resp, err = client.Get("https://localhost:18443/ping")
-	require.Nil(t, err)
+	resp, err = client.Get(fmt.Sprintf("https://localhost:%d/ping", sslPort))
+	require.NoError(t, err)
 	defer resp.Body.Close()
 	assert.Equal(t, 200, resp.StatusCode)
-	body, err := ioutil.ReadAll(resp.Body)
-	assert.Nil(t, err)
+	body, err := io.ReadAll(resp.Body)
+	assert.NoError(t, err)
 	assert.Equal(t, "pong", string(body))
 
+	cancel()
+	app.Wait()
+}
+
+func TestServerApp_WithRemote(t *testing.T) {
+
+	opts := ServerCommand{}
+	opts.SetCommon(CommonOpts{RemarkURL: "https://demo.remark42.com", SharedSecret: "123456"})
+
+	// prepare options
+	p := flags.NewParser(&opts, flags.Default)
+	port := chooseRandomUnusedPort()
+	_, err := p.ParseArgs([]string{"--admin-passwd=password", "--cache.type=none",
+		"--store.type=rpc", "--store.rpc.api=http://127.0.0.1",
+		"--port=" + strconv.Itoa(port), "--admin.type=rpc", "--admin.rpc.api=http://127.0.0.1", "--avatar.fs.path=/tmp"})
+	require.NoError(t, err)
+	opts.Auth.Github.CSEC, opts.Auth.Github.CID = "csec", "cid"
+	opts.BackupLocation, opts.Image.FS.Path = "/tmp", "/tmp"
+
+	// create app
+	app, err := opts.newServerApp(context.Background())
+	require.NoError(t, err)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	go func() { _ = app.run(ctx) }()
+	waitForHTTPServerStart(port)
+
+	// send ping
+	resp, err := http.Get(fmt.Sprintf("http://localhost:%d/api/v1/ping", port))
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	assert.Equal(t, 200, resp.StatusCode)
+	body, err := io.ReadAll(resp.Body)
+	assert.NoError(t, err)
+	assert.Equal(t, "pong", string(body))
+
+	cancel()
 	app.Wait()
 }
 
@@ -249,8 +311,8 @@ func TestServerApp_Failed(t *testing.T) {
 
 	// RO bolt location
 	_, err := p.ParseArgs([]string{"--backup=/tmp", "--store.bolt.path=/dev/null", "--image.fs.path=/tmp"})
-	assert.Nil(t, err)
-	_, err = opts.newServerApp()
+	assert.NoError(t, err)
+	_, err = opts.newServerApp(context.Background())
 	assert.EqualError(t, err, "failed to make data store engine: failed to create bolt store: can't make directory /dev/null: mkdir /dev/null: not a directory")
 	t.Log(err)
 
@@ -259,9 +321,9 @@ func TestServerApp_Failed(t *testing.T) {
 	opts.SetCommon(CommonOpts{RemarkURL: "https://demo.remark42.com", SharedSecret: "123456"})
 
 	_, err = p.ParseArgs([]string{"--store.bolt.path=/tmp", "--backup=/dev/null/not-writable"})
-	assert.Nil(t, err)
-	_, err = opts.newServerApp()
-	assert.EqualError(t, err, "can't make directory /dev/null/not-writable: mkdir /dev/null: not a directory")
+	assert.NoError(t, err)
+	_, err = opts.newServerApp(context.Background())
+	assert.EqualError(t, err, "failed to create backup store: can't make directory /dev/null/not-writable: mkdir /dev/null: not a directory")
 	t.Log(err)
 
 	// invalid url
@@ -269,8 +331,8 @@ func TestServerApp_Failed(t *testing.T) {
 	opts.SetCommon(CommonOpts{RemarkURL: "demo.remark42.com", SharedSecret: "123456"})
 
 	_, err = p.ParseArgs([]string{"--backup=/tmp", "----store.bolt.path=/tmp"})
-	assert.Nil(t, err)
-	_, err = opts.newServerApp()
+	assert.NoError(t, err)
+	_, err = opts.newServerApp(context.Background())
 	assert.EqualError(t, err, "invalid remark42 url demo.remark42.com")
 	t.Log(err)
 
@@ -278,47 +340,116 @@ func TestServerApp_Failed(t *testing.T) {
 	opts.SetCommon(CommonOpts{RemarkURL: "https://demo.remark42.com", SharedSecret: "123456"})
 
 	_, err = p.ParseArgs([]string{"--backup=/tmp", "--store.type=blah"})
-	assert.NotNil(t, err, "blah is invalid type")
+	assert.Error(t, err, "blah is invalid type")
 
 	opts.Store.Type = "blah"
-	_, err = opts.newServerApp()
+	_, err = opts.newServerApp(context.Background())
 	assert.EqualError(t, err, "failed to make data store engine: unsupported store type blah")
 	t.Log(err)
+
+	// wrong redis location
+	opts = ServerCommand{}
+	opts.SetCommon(CommonOpts{RemarkURL: "https://demo.remark42.com", SharedSecret: "123456"})
+	p = flags.NewParser(&opts, flags.Default)
+	_, err = p.ParseArgs([]string{"--store.bolt.path=/tmp", "--cache.type=redis_pub_sub", "--cache.redis_addr=wrong_address"})
+	assert.NoError(t, err)
+	_, err = opts.newServerApp(context.Background())
+	assert.EqualError(t, err,
+		"failed to make cache: cache backend initialization, redis PubSub initialisation: "+
+			"problem subscribing to channel remark42-cache on address wrong_address: "+
+			"dial tcp: address wrong_address: missing port in address")
+	t.Log(err)
 }
 
 func TestServerApp_Shutdown(t *testing.T) {
-	app, ctx := prepServerApp(t, 500*time.Millisecond, func(o ServerCommand) ServerCommand {
-		o.Port = rand.Intn(40000) + 10000
+	app, ctx, cancel := prepServerApp(t, func(o ServerCommand) ServerCommand {
+		o.Port = chooseRandomUnusedPort()
 		return o
 	})
+	time.AfterFunc(100*time.Millisecond, func() {
+		cancel()
+	})
 	st := time.Now()
 	err := app.run(ctx)
-	assert.Nil(t, err)
-	assert.True(t, time.Since(st).Seconds() < 1, "should take about 500msec")
+	assert.NoError(t, err)
+	assert.True(t, time.Since(st).Seconds() < 1, "should take about 100msec")
 	app.Wait()
 }
 
 func TestServerApp_MainSignal(t *testing.T) {
 
+	done := make(chan struct{})
 	go func() {
+		<-done
 		time.Sleep(250 * time.Millisecond)
 		err := syscall.Kill(syscall.Getpid(), syscall.SIGTERM)
-		require.Nil(t, err)
+		require.NoError(t, err)
 	}()
-	st := time.Now()
 
 	s := ServerCommand{}
 	s.SetCommon(CommonOpts{RemarkURL: "https://demo.remark42.com", SharedSecret: "123456"})
 
 	p := flags.NewParser(&s, flags.Default)
+	port := chooseRandomUnusedPort()
 	args := []string{"test", "--store.bolt.path=/tmp/xyz", "--backup=/tmp", "--avatar.type=bolt",
-		"--avatar.bolt.file=/tmp/ava-test.db", "--port=18100", "--notify.type=none", "--image.fs.path=/tmp"}
+		"--avatar.bolt.file=/tmp/ava-test.db", "--port=" + strconv.Itoa(port), "--image.fs.path=/tmp"}
 	defer os.Remove("/tmp/ava-test.db")
 	_, err := p.ParseArgs(args)
-	require.Nil(t, err)
+	require.NoError(t, err)
+	st := time.Now()
+	close(done)
 	err = s.Execute(args)
-	assert.NoError(t, err, "execute failed")
-	assert.True(t, time.Since(st).Seconds() < 1, "should take about 500msec")
+	assert.NoError(t, err, "execute should be without errors")
+	assert.True(t, time.Since(st).Seconds() < 5, "should take under five sec", time.Since(st).Seconds())
+}
+
+func TestServerApp_DeprecatedArgs(t *testing.T) {
+	s := ServerCommand{}
+	s.SetCommon(CommonOpts{RemarkURL: "https://demo.remark42.com", SharedSecret: "123456"})
+
+	p := flags.NewParser(&s, flags.Default)
+	args := []string{
+		"test",
+		"--notify.type=telegram",
+		"--auth.email.host=smtp.example.org",
+		"--auth.email.port=666",
+		"--auth.email.tls",
+		"--auth.email.user=test_user",
+		"--auth.email.passwd=test_password",
+		"--auth.email.timeout=15s",
+		"--auth.email.template=file.tmpl",
+		"--notify.telegram.token=abcd",
+		"--notify.telegram.timeout=3m",
+	}
+	assert.Empty(t, s.SMTP.Host)
+	assert.Empty(t, s.SMTP.Port)
+	assert.Empty(t, s.SMTP.TLS)
+	assert.Empty(t, s.SMTP.Username)
+	assert.Empty(t, s.SMTP.Password)
+	assert.Empty(t, s.SMTP.TimeOut)
+	_, err := p.ParseArgs(args)
+	require.NoError(t, err)
+	deprecatedFlags := s.HandleDeprecatedFlags()
+	assert.ElementsMatch(t,
+		[]DeprecatedFlag{
+			{Old: "auth.email.host", New: "smtp.host", Version: "1.5"},
+			{Old: "auth.email.port", New: "smtp.port", Version: "1.5"},
+			{Old: "auth.email.tls", New: "smtp.tls", Version: "1.5"},
+			{Old: "auth.email.user", New: "smtp.username", Version: "1.5"},
+			{Old: "auth.email.passwd", New: "smtp.password", Version: "1.5"},
+			{Old: "auth.email.timeout", New: "smtp.timeout", Version: "1.5"},
+			{Old: "auth.email.template", Version: "1.5"},
+			{Old: "notify.type", New: "notify.(users|admins)", Version: "1.9"},
+			{Old: "notify.telegram.token", New: "telegram.token", Version: "1.9"},
+			{Old: "notify.telegram.timeout", New: "telegram.timeout", Version: "1.9"},
+		},
+		deprecatedFlags)
+	assert.Equal(t, "smtp.example.org", s.SMTP.Host)
+	assert.Equal(t, 666, s.SMTP.Port)
+	assert.Equal(t, true, s.SMTP.TLS)
+	assert.Equal(t, "test_user", s.SMTP.Username)
+	assert.Equal(t, "test_password", s.SMTP.Password)
+	assert.Equal(t, 15*time.Second, s.SMTP.TimeOut)
 }
 
 func Test_ACMEEmail(t *testing.T) {
@@ -327,9 +458,9 @@ func Test_ACMEEmail(t *testing.T) {
 	p := flags.NewParser(&cmd, flags.Default)
 	args := []string{"--ssl.type=auto"}
 	_, err := p.ParseArgs(args)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	cfg, err := cmd.makeSSLConfig()
-	require.Nil(t, err)
+	require.NoError(t, err)
 	assert.Equal(t, "admin@remark.com", cfg.ACMEEmail)
 
 	cmd = ServerCommand{}
@@ -337,9 +468,9 @@ func Test_ACMEEmail(t *testing.T) {
 	p = flags.NewParser(&cmd, flags.Default)
 	args = []string{"--ssl.type=auto", "--ssl.acme-email=adminname@adminhost.com"}
 	_, err = p.ParseArgs(args)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	cfg, err = cmd.makeSSLConfig()
-	require.Nil(t, err)
+	require.NoError(t, err)
 	assert.Equal(t, "adminname@adminhost.com", cfg.ACMEEmail)
 
 	cmd = ServerCommand{}
@@ -347,9 +478,9 @@ func Test_ACMEEmail(t *testing.T) {
 	p = flags.NewParser(&cmd, flags.Default)
 	args = []string{"--ssl.type=auto", "--admin.type=shared", "--admin.shared.email=superadmin@admin.com"}
 	_, err = p.ParseArgs(args)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	cfg, err = cmd.makeSSLConfig()
-	require.Nil(t, err)
+	require.NoError(t, err)
 	assert.Equal(t, "superadmin@admin.com", cfg.ACMEEmail)
 
 	cmd = ServerCommand{}
@@ -357,21 +488,21 @@ func Test_ACMEEmail(t *testing.T) {
 	p = flags.NewParser(&cmd, flags.Default)
 	args = []string{"--ssl.type=auto", "--admin.type=shared"}
 	_, err = p.ParseArgs(args)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	cfg, err = cmd.makeSSLConfig()
-	require.Nil(t, err)
+	require.NoError(t, err)
 	assert.Equal(t, "admin@remark.com", cfg.ACMEEmail)
 }
 
 func TestServerAuthHooks(t *testing.T) {
-	port := rand.Intn(40000) + 10000
-	app, ctx := prepServerApp(t, 5*time.Second, func(o ServerCommand) ServerCommand {
+	port := chooseRandomUnusedPort()
+	app, ctx, cancel := prepServerApp(t, func(o ServerCommand) ServerCommand {
 		o.Port = port
 		return o
 	})
 
 	go func() { _ = app.run(ctx) }()
-	time.Sleep(100 * time.Millisecond) // let server start
+	waitForHTTPServerStart(port)
 
 	// make a token for user dev
 	tkService := app.restSrv.Authenticator.TokenService()
@@ -394,52 +525,167 @@ func TestServerAuthHooks(t *testing.T) {
 	t.Log(tk)
 
 	// add comment
-	client := http.Client{Timeout: 1 * time.Second}
+	client := http.Client{Timeout: 10 * time.Second}
 	req, err := http.NewRequest("POST", fmt.Sprintf("http://localhost:%d/api/v1/comment", port),
 		strings.NewReader(`{"text": "test 123", "locator":{"url": "https://radio-t.com/p/2018/12/29/podcast-630/", "site": "remark"}}`))
+	require.NoError(t, err)
 	req.Header.Set("X-JWT", tk)
-	require.Nil(t, err)
 	resp, err := client.Do(req)
-	require.Nil(t, err)
-	defer resp.Body.Close()
+	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, http.StatusCreated, resp.StatusCode, "non-blocked user able to post")
 
-	// block user dev as admin
-	req, e := http.NewRequest(http.MethodPut,
-		fmt.Sprintf("http://localhost:%d/api/v1/admin/user/dev?site=remark&block=1&ttl=10d", port), nil)
-	assert.Nil(t, e)
-	req.SetBasicAuth("admin", "password")
-	resp, e = client.Do(req)
-	require.Nil(t, e)
-	defer resp.Body.Close()
-	assert.Equal(t, http.StatusOK, resp.StatusCode, "user dev blocked")
-	b, err := ioutil.ReadAll(resp.Body)
-	require.Nil(t, err)
-	t.Log(string(b))
+	// add comment with no-aud claim
+	claimsNoAud := claims
+	claimsNoAud.Audience = ""
+	tkNoAud, err := tkService.Token(claimsNoAud)
+	require.NoError(t, err)
+	t.Logf("no-aud claims: %s", tkNoAud)
+	req, err = http.NewRequest("POST", fmt.Sprintf("http://localhost:%d/api/v1/comment", port),
+		strings.NewReader(`{"text": "test 123", "locator":{"url": "https://radio-t.com/p/2018/12/29/podcast-631/",
+	"site": "remark"}}`))
+	require.NoError(t, err)
+	req.Header.Set("X-JWT", tkNoAud)
+	resp, err = client.Do(req)
+	require.NoError(t, err)
+	body, err := io.ReadAll(resp.Body)
+	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
+	assert.Equal(t, http.StatusUnauthorized, resp.StatusCode, "user without aud claim rejected, \n"+tkNoAud+"\n"+string(body))
 
-	time.Sleep(2 * time.Second) // make sure token expired and refresh happened
+	// block user dev as admin
+	req, err = http.NewRequest(http.MethodPut,
+		fmt.Sprintf("http://localhost:%d/api/v1/admin/user/dev?site=remark&block=1&ttl=10d", port), http.NoBody)
+	assert.NoError(t, err)
+	req.SetBasicAuth("admin", "password")
+	resp, err = client.Do(req)
+	require.NoError(t, err)
+	assert.Equal(t, http.StatusOK, resp.StatusCode, "user dev blocked")
+	b, err := io.ReadAll(resp.Body)
+	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
+	t.Log(string(b))
 
 	// try add a comment with blocked user
 	req, err = http.NewRequest("POST", fmt.Sprintf("http://localhost:%d/api/v1/comment", port),
 		strings.NewReader(`{"text": "test 123 blah", "locator":{"url": "https://radio-t.com/blah1", "site": "remark"}}`))
+	require.NoError(t, err)
 	req.Header.Set("X-JWT", tk)
-	require.Nil(t, err)
 	resp, err = client.Do(req)
-	require.Nil(t, err)
-	defer resp.Body.Close()
-	assert.Equal(t, http.StatusUnauthorized, resp.StatusCode, "blocked user can't post")
+	require.NoError(t, err)
+	body, err = io.ReadAll(resp.Body)
+	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
+	assert.True(t, resp.StatusCode == http.StatusForbidden || resp.StatusCode == http.StatusUnauthorized,
+		"blocked user can't post, \n"+tk+"\n"+string(body))
 
+	cancel()
 	app.Wait()
+	client.CloseIdleConnections()
 }
 
-func prepServerApp(t *testing.T, duration time.Duration, fn func(o ServerCommand) ServerCommand) (*serverApp, context.Context) {
+func TestServer_loadEmailTemplate(t *testing.T) {
+	cmd := ServerCommand{}
+	cmd.Auth.Email.MsgTemplate = "testdata/email.tmpl"
+	r, err := cmd.loadEmailTemplate()
+	assert.NoError(t, err)
+	assert.Equal(t, "The token is {{.Token}}", r)
+
+	cmd.Auth.Email.MsgTemplate = "badpath.tmpl"
+	r, err = cmd.loadEmailTemplate()
+	assert.EqualError(t, err, "failed to read file badpath.tmpl: open badpath.tmpl: no such file or directory")
+	assert.Equal(t, r, "")
+}
+
+func TestServerCommand_parseSameSite(t *testing.T) {
+
+	tbl := []struct {
+		inp string
+		res http.SameSite
+	}{
+		{"", http.SameSiteDefaultMode},
+		{"default", http.SameSiteDefaultMode},
+		{"blah", http.SameSiteDefaultMode},
+		{"none", http.SameSiteNoneMode},
+		{"lax", http.SameSiteLaxMode},
+		{"strict", http.SameSiteStrictMode},
+	}
+
+	cmd := ServerCommand{}
+	for i, tt := range tbl {
+		tt := tt
+		t.Run(strconv.Itoa(i), func(t *testing.T) {
+			assert.Equal(t, tt.res, cmd.parseSameSite(tt.inp))
+		})
+	}
+}
+
+func Test_splitAtCommas(t *testing.T) {
+
+	tbl := []struct {
+		inp string
+		res []string
+	}{
+		{"a string", []string{"a string"}},
+		{"vv1, vv2, vv3", []string{"vv1", "vv2", "vv3"}},
+		{`"vv1, blah", vv2, vv3`, []string{"vv1, blah", "vv2", "vv3"}},
+		{
+			`Access-Control-Allow-Headers:"DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type",header123:val, foo:"bar1,bar2"`,
+			[]string{"Access-Control-Allow-Headers:\"DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type\"", "header123:val", "foo:\"bar1,bar2\""},
+		},
+		{"", []string{}},
+	}
+
+	for i, tt := range tbl {
+		t.Run(strconv.Itoa(i), func(t *testing.T) {
+			assert.Equal(t, tt.res, splitAtCommas(tt.inp))
+		})
+	}
+}
+
+func chooseRandomUnusedPort() (port int) {
+	for i := 0; i < 10; i++ {
+		port = 40000 + int(rand.Int31n(10000))
+		if ln, err := net.Listen("tcp", fmt.Sprintf(":%d", port)); err == nil {
+			_ = ln.Close()
+			break
+		}
+	}
+	return port
+}
+
+func waitForHTTPServerStart(port int) {
+	// wait for up to 3 seconds for server to start before returning it
+	client := http.Client{Timeout: time.Second}
+	for i := 0; i < 300; i++ {
+		time.Sleep(time.Millisecond * 10)
+		if resp, err := client.Get(fmt.Sprintf("http://localhost:%d", port)); err == nil {
+			_ = resp.Body.Close()
+			return
+		}
+	}
+}
+
+func waitForHTTPSServerStart(port int) {
+	// wait for up to 3 seconds for HTTPS server to start
+	for i := 0; i < 300; i++ {
+		time.Sleep(time.Millisecond * 10)
+		conn, _ := net.DialTimeout("tcp", fmt.Sprintf("localhost:%d", port), time.Millisecond*10)
+		if conn != nil {
+			_ = conn.Close()
+			break
+		}
+	}
+}
+
+func prepServerApp(t *testing.T, fn func(o ServerCommand) ServerCommand) (*serverApp, context.Context, context.CancelFunc) {
 	cmd := ServerCommand{}
 	cmd.SetCommon(CommonOpts{RemarkURL: "https://demo.remark42.com", SharedSecret: "secret"})
 
 	// prepare options
 	p := flags.NewParser(&cmd, flags.Default)
 	_, err := p.ParseArgs([]string{"--admin-passwd=password", "--site=remark"})
-	require.Nil(t, err)
+	require.NoError(t, err)
 	cmd.Avatar.FS.Path, cmd.Avatar.Type, cmd.BackupLocation, cmd.Image.FS.Path = "/tmp", "fs", "/tmp", "/tmp"
 	cmd.Store.Bolt.Path = fmt.Sprintf("/tmp/%d", cmd.Port)
 	cmd.Store.Bolt.Timeout = 10 * time.Second
@@ -447,24 +693,46 @@ func prepServerApp(t *testing.T, duration time.Duration, fn func(o ServerCommand
 	cmd.Auth.Google.CSEC, cmd.Auth.Google.CID = "csec", "cid"
 	cmd.Auth.Facebook.CSEC, cmd.Auth.Facebook.CID = "csec", "cid"
 	cmd.Auth.Yandex.CSEC, cmd.Auth.Yandex.CID = "csec", "cid"
+	cmd.Auth.Microsoft.CSEC, cmd.Auth.Microsoft.CID = "csec", "cid"
+	cmd.Auth.Twitter.CSEC, cmd.Auth.Twitter.CID = "csec", "cid"
+	cmd.Auth.Patreon.CSEC, cmd.Auth.Patreon.CID = "csec", "cid"
+	cmd.Auth.Telegram = true
+	cmd.Telegram.Token = "token"
+	cmd.Auth.Email.Enable = true
+	cmd.Auth.Email.MsgTemplate = "testdata/email.tmpl"
 	cmd.BackupLocation = "/tmp"
-	cmd.Notify.Type = "telegram"
-	cmd.Notify.Telegram.API = "http://127.0.0.1:12340/"
-	cmd.Notify.Telegram.Token = "blah"
+	cmd.Notify.Users = []string{"email"}
+	cmd.Notify.Admins = []string{"email"}
+	cmd.Notify.Email.From = "from@example.org"
+	cmd.Notify.Email.VerificationSubject = "test verification email subject"
+	cmd.SMTP.Host = "127.0.0.1"
+	cmd.SMTP.Port = 25
+	cmd.SMTP.Username = "test_user"
+	cmd.SMTP.Password = "test_password"
+	cmd.SMTP.TimeOut = time.Second
+	cmd.UpdateLimit = 10
+	cmd.Admin.Type = "shared"
+	cmd.Admin.Shared.Admins = []string{"id1", "id2"}
+	cmd.RestrictedNames = []string{"umputun", "bobuk"}
+	cmd.emailMsgTemplatePath = "../../templates/email_reply.html.tmpl"
+	cmd.emailVerificationTemplatePath = "../../templates/email_confirmation_subscription.html.tmpl"
 	cmd = fn(cmd)
 
 	os.Remove(cmd.Store.Bolt.Path + "/remark.db")
 
-	// create app
-	app, err := cmd.newServerApp()
-	require.Nil(t, err)
+	return createAppFromCmd(t, cmd)
+}
+
+func createAppFromCmd(t *testing.T, cmd ServerCommand) (*serverApp, context.Context, context.CancelFunc) {
+	app, err := cmd.newServerApp(context.Background())
+	require.NoError(t, err)
 
 	ctx, cancel := context.WithCancel(context.Background())
-	go func() {
-		time.Sleep(duration)
-		log.Print("[TEST] terminate app")
-		cancel()
-	}()
 	rand.Seed(time.Now().UnixNano())
-	return app, ctx
+	return app, ctx, cancel
+}
+
+func TestMain(m *testing.M) {
+	// ignore is added only for GitHub Actions, can't reproduce locally
+	goleak.VerifyTestMain(m, goleak.IgnoreTopFunction("net/http.(*Server).Shutdown"))
 }

backend/app/cmd/testdata/email.tmpl

@@ -0,0 +1 @@
+The token is {{.Token}}

backend/app/cmd/testdata/remap_urls.txt

@@ -0,0 +1,2 @@
+http://oldsite.com* https://newsite.com*
+http://oldsite.com/from-old-page/1 https://newsite.com/to-new-page/1

backend/app/main.go

@@ -8,9 +8,9 @@ import (
 	"syscall"
 
 	log "github.com/go-pkgz/lgr"
-	"github.com/jessevdk/go-flags"
+	"github.com/umputun/go-flags"
 
-	"github.com/umputun/remark/backend/app/cmd"
+	"github.com/umputun/remark42/backend/app/cmd"
 )
 
 // Opts with all cli commands and flags
@@ -21,9 +21,10 @@ type Opts struct {
 	RestoreCmd cmd.RestoreCommand `command:"restore"`
 	AvatarCmd  cmd.AvatarCommand  `command:"avatar"`
 	CleanupCmd cmd.CleanupCommand `command:"cleanup"`
+	RemapCmd   cmd.RemapCommand   `command:"remap"`
 
 	RemarkURL    string `long:"url" env:"REMARK_URL" required:"true" description:"url to remark"`
-	SharedSecret string `long:"secret" env:"SECRET" required:"true" description:"shared secret key"`
+	SharedSecret string `long:"secret" env:"SECRET" required:"true" description:"the shared secret key used to sign JWT, should be a random, long, hard-to-guess string"`
 
 	Dbg bool `long:"dbg" env:"DEBUG" description:"debug mode"`
 }
@@ -44,6 +45,13 @@ func main() {
 			SharedSecret: opts.SharedSecret,
 			Revision:     revision,
 		})
+		for _, entry := range c.HandleDeprecatedFlags() {
+			deprecationNote := fmt.Sprintf("[WARN] --%s is deprecated since v%s and will be removed in the future", entry.Old, entry.Version)
+			if entry.New != "" {
+				deprecationNote += fmt.Sprintf(", please use --%s instead", entry.New)
+			}
+			log.Print(deprecationNote)
+		}
 		err := c.Execute(args)
 		if err != nil {
 			log.Printf("[ERROR] failed with %+v", err)
@@ -79,9 +87,10 @@ func getDump() string {
 	return string(stacktrace[:length])
 }
 
+// nolint:gochecknoinits // can't avoid it in this place
 func init() {
 	// catch SIGQUIT and print stack traces
-	sigChan := make(chan os.Signal)
+	sigChan := make(chan os.Signal, 1)
 	go func() {
 		for range sigChan {
 			log.Printf("[INFO] SIGQUIT detected, dump:\n%s", getDump())

backend/app/main_test.go

@@ -1,21 +1,24 @@
 package main
 
 import (
-	"context"
+	"fmt"
+	"io"
 	"io/ioutil"
+	"math/rand"
+	"net"
 	"net/http"
+	"net/http/httptest"
 	"os"
+	"strconv"
 	"strings"
-	"sync"
+	"sync/atomic"
 	"syscall"
 	"testing"
 	"time"
 
-	log "github.com/go-pkgz/lgr"
-	"github.com/go-pkgz/repeater"
-
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"go.uber.org/goleak"
 )
 
 func Test_Main(t *testing.T) {
@@ -24,45 +27,98 @@ func Test_Main(t *testing.T) {
 	require.NoError(t, err)
 	defer os.RemoveAll(dir)
 
+	port := chooseRandomUnusedPort()
 	os.Args = []string{"test", "server", "--secret=123456", "--store.bolt.path=" + dir, "--backup=/tmp",
-		"--avatar.fs.path=" + dir, "--port=18222", "--url=https://demo.remark42.com", "--dbg", "--notify.type=none"}
+		"--avatar.fs.path=" + dir, "--port=" + strconv.Itoa(port), "--url=https://demo.remark42.com", "--dbg", "--notify.type=none"}
 
+	done := make(chan struct{})
 	go func() {
-		time.Sleep(5000 * time.Millisecond)
+		<-done
 		e := syscall.Kill(syscall.Getpid(), syscall.SIGTERM)
-		require.Nil(t, e)
+		require.NoError(t, e)
 	}()
 
-	wg := sync.WaitGroup{}
-	wg.Add(1)
+	finished := make(chan struct{})
 	go func() {
-		st := time.Now()
 		main()
-		assert.True(t, time.Since(st).Seconds() >= 5, "should take about 5s")
-		wg.Done()
+		close(finished)
 	}()
 
-	var passed bool
-	err = repeater.NewDefault(10, time.Millisecond*500).Do(context.Background(), func() error {
-		resp, e := http.Get("http://localhost:18222/api/v1/ping")
-		if e != nil {
-			t.Logf("%+v", e)
-			return e
-		}
-		require.Nil(t, e)
-		defer resp.Body.Close()
-		assert.Equal(t, 200, resp.StatusCode)
-		body, e := ioutil.ReadAll(resp.Body)
-		assert.Nil(t, e)
-		assert.Equal(t, "pong", string(body))
-		passed = true
-		return nil
-	})
+	// defer cleanup because require check below can fail
+	defer func() {
+		close(done)
+		<-finished
+	}()
 
+	waitForHTTPServerStart(port)
+	resp, err := http.Get(fmt.Sprintf("http://localhost:%d/api/v1/ping", port))
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	assert.Equal(t, 200, resp.StatusCode)
+	body, err := io.ReadAll(resp.Body)
 	assert.NoError(t, err)
-	assert.Equal(t, true, passed, "at least on ping passed")
+	assert.Equal(t, "pong", string(body))
+}
 
-	wg.Wait()
+func TestMain_WithWebhook(t *testing.T) {
+	dir, err := ioutil.TempDir(os.TempDir(), "remark42")
+	require.NoError(t, err)
+	defer os.RemoveAll(dir)
+
+	var webhookSent int32
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		atomic.StoreInt32(&webhookSent, 1)
+		assert.Equal(t, "application/json", r.Header.Get("Content-Type"))
+
+		b, e := io.ReadAll(r.Body)
+		defer r.Body.Close()
+
+		assert.Nil(t, e)
+		assert.Equal(t, "Comment: env test", string(b))
+	}))
+	defer ts.Close()
+
+	port := chooseRandomUnusedPort()
+	os.Args = []string{"test", "server", "--secret=123456", "--store.bolt.path=" + dir, "--backup=/tmp",
+		"--avatar.fs.path=" + dir, "--port=" + strconv.Itoa(port), "--url=https://demo.remark42.com", "--dbg",
+		"--admin-passwd=password", "--site=remark", "--notify.admins=webhook"}
+
+	err = os.Setenv("NOTIFY_WEBHOOK_URL", ts.URL)
+	assert.NoError(t, err)
+	err = os.Setenv("NOTIFY_WEBHOOK_TEMPLATE", "Comment: {{.Orig}}")
+	assert.NoError(t, err)
+	err = os.Setenv("NOTIFY_WEBHOOK_HEADERS", "Content-Type:application/json")
+	assert.NoError(t, err)
+
+	done := make(chan struct{})
+	go func() {
+		<-done
+		e := syscall.Kill(syscall.Getpid(), syscall.SIGTERM)
+		require.NoError(t, e)
+	}()
+
+	finished := make(chan struct{})
+	go func() {
+		main()
+		assert.Eventually(t, func() bool {
+			return atomic.LoadInt32(&webhookSent) == int32(1)
+		}, time.Second, 100*time.Millisecond, "webhook was not sent")
+		close(finished)
+	}()
+
+	// defer cleanup because require check below can fail
+	defer func() {
+		close(done)
+		<-finished
+	}()
+
+	waitForHTTPServerStart(port)
+
+	resp, err := http.Post(fmt.Sprintf("http://admin:password@localhost:%d/api/v1/comment", port), "",
+		strings.NewReader(`{"text": "env test", "locator":{"url": "https://radio-t.com", "site": "remark"}}`))
+	require.NoError(t, err)
+	defer resp.Body.Close()
+	assert.Equal(t, 201, resp.StatusCode)
 }
 
 func TestGetDump(t *testing.T) {
@@ -70,5 +126,37 @@ func TestGetDump(t *testing.T) {
 	assert.True(t, strings.Contains(dump, "goroutine"))
 	assert.True(t, strings.Contains(dump, "[running]"))
 	assert.True(t, strings.Contains(dump, "backend/app/main.go"))
-	log.Printf("\n dump: %s", dump)
+	t.Logf("\n dump: %s", dump)
+}
+
+func chooseRandomUnusedPort() (port int) {
+	for i := 0; i < 10; i++ {
+		port = 40000 + int(rand.Int31n(10000))
+		if ln, err := net.Listen("tcp", fmt.Sprintf(":%d", port)); err == nil {
+			_ = ln.Close()
+			break
+		}
+	}
+	return port
+}
+
+func waitForHTTPServerStart(port int) {
+	// wait for up to 10 seconds for server to start before returning it
+	client := http.Client{Timeout: time.Second}
+	for i := 0; i < 100; i++ {
+		time.Sleep(time.Millisecond * 100)
+		if resp, err := client.Get(fmt.Sprintf("http://localhost:%d", port)); err == nil {
+			_ = resp.Body.Close()
+			return
+		}
+	}
+}
+
+func TestMain(m *testing.M) {
+	// both ignores are for leaks which are detected locally
+	goleak.VerifyTestMain(
+		m,
+		goleak.IgnoreTopFunction("github.com/umputun/remark42/backend/app.init.0.func1"),
+		goleak.IgnoreTopFunction("net/http.(*Server).Shutdown"),
+	)
 }

backend/app/migrator/backup.go

@@ -4,7 +4,6 @@ import (
 	"compress/gzip"
 	"context"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"sort"
 	"strings"
@@ -27,6 +26,7 @@ type AutoBackup struct {
 func (ab AutoBackup) Do(ctx context.Context) {
 	log.Printf("[INFO] activate auto-backup for %s under %s, duration %s", ab.SiteID, ab.BackupLocation, ab.Duration)
 	tick := time.NewTicker(ab.Duration)
+	defer tick.Stop()
 	log.Printf("[DEBUG] first backup for %s at %s", ab.SiteID, time.Now().Add(ab.Duration))
 
 	for {
@@ -68,15 +68,20 @@ func (ab AutoBackup) makeBackup() (string, error) {
 }
 
 func (ab AutoBackup) removeOldBackupFiles() {
-	files, err := ioutil.ReadDir(ab.BackupLocation)
+	files, err := os.ReadDir(ab.BackupLocation)
 	if err != nil {
 		log.Printf("[WARN] can't read files in backup directory %s, %s", ab.BackupLocation, err)
 		return
 	}
 	backFiles := []os.FileInfo{}
 	for _, file := range files {
+		info, e := file.Info()
+		if e != nil {
+			log.Printf("[WARN] can't read info for directory %s, %s", file.Name(), e)
+			return
+		}
 		if strings.HasPrefix(file.Name(), "backup-"+ab.SiteID) {
-			backFiles = append(backFiles, file)
+			backFiles = append(backFiles, info)
 		}
 	}
 	sort.Slice(backFiles, func(i int, j int) bool { return backFiles[i].Name() < backFiles[j].Name() })

backend/app/migrator/backup_test.go

@@ -4,34 +4,34 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"testing"
 	"time"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestBackup_RemoveOldBackupFiles(t *testing.T) {
 	loc := "/tmp/remark-backups.test"
 	defer os.RemoveAll(loc)
 
-	assert.NoError(t, os.MkdirAll(loc, 0700))
+	assert.NoError(t, os.MkdirAll(loc, 0o700))
 
 	for i := 1; i <= 10; i++ {
 		fname := fmt.Sprintf("%s/backup-site1-201712%02d.gz", loc, i)
-		err := ioutil.WriteFile(fname, []byte("blah"), 0600)
-		assert.Nil(t, err)
+		err := os.WriteFile(fname, []byte("blah"), 0o600)
+		assert.NoError(t, err)
 	}
 	fname := fmt.Sprintf("%s/backup-site2-20171210.gz", loc)
-	err := ioutil.WriteFile(fname, []byte("blah"), 0600)
-	assert.Nil(t, err)
+	err := os.WriteFile(fname, []byte("blah"), 0o600)
+	assert.NoError(t, err)
 
 	bk := AutoBackup{BackupLocation: loc, SiteID: "site1", KeepMax: 3}
 	bk.removeOldBackupFiles()
-	ff, err := ioutil.ReadDir(loc)
-	assert.Nil(t, err)
-	assert.Equal(t, 4, len(ff), "should keep 4 files - 3 kept for sit1, and one for site2")
+	ff, err := os.ReadDir(loc)
+	assert.NoError(t, err)
+	require.Equal(t, 4, len(ff), "should keep 4 files - 3 kept for sit1, and one for site2")
 	assert.Equal(t, "backup-site1-20171208.gz", ff[0].Name())
 	assert.Equal(t, "backup-site1-20171209.gz", ff[1].Name())
 	assert.Equal(t, "backup-site1-20171210.gz", ff[2].Name())
@@ -41,7 +41,7 @@ func TestBackup_RemoveOldBackupFiles(t *testing.T) {
 func TestBackup_MakeBackup(t *testing.T) {
 	loc := "/tmp/remark-backups.test"
 	defer os.RemoveAll(loc)
-	assert.NoError(t, os.MkdirAll(loc, 0700))
+	assert.NoError(t, os.MkdirAll(loc, 0o700))
 
 	bk := AutoBackup{BackupLocation: loc, SiteID: "site1", KeepMax: 3, Exporter: &mockExporter{}}
 	fname, err := bk.makeBackup()
@@ -57,7 +57,7 @@ func TestBackup_MakeBackup(t *testing.T) {
 func TestBackup_Do(t *testing.T) {
 	loc := "/tmp/remark-backups.test"
 	defer os.RemoveAll(loc)
-	assert.NoError(t, os.MkdirAll(loc, 0700))
+	assert.NoError(t, os.MkdirAll(loc, 0o700))
 
 	ctx, cancel := context.WithCancel(context.Background())
 	go func() {
@@ -76,7 +76,7 @@ func TestBackup_Do(t *testing.T) {
 
 type mockExporter struct{}
 
-func (mock *mockExporter) Export(w io.Writer, siteID string) (int, error) {
+func (mock *mockExporter) Export(w io.Writer, _ string) (int, error) {
 	_, err := w.Write([]byte("some export blah blah 1234567890"))
 	return 1000, err
 }

backend/app/migrator/commento.go

@@ -0,0 +1,134 @@
+package migrator
+
+import (
+	"encoding/json"
+	"io"
+	"time"
+
+	"github.com/pkg/errors"
+	"github.com/umputun/remark42/backend/app/store"
+
+	log "github.com/go-pkgz/lgr"
+)
+
+// Commento implements Importer from commento export json
+type Commento struct {
+	DataStore Store
+}
+
+// Credit: https://gitlab.com/commento/commento/-/blob/master/api/domain_import_commento.go#L11-L15
+type commentoExport struct {
+	Version    int                 `json:"version"`
+	Comments   []commentoComment   `json:"comments"`
+	Commenters []commentoCommenter `json:"commenters"`
+}
+
+// Credit: https://gitlab.com/commento/commento/-/blob/master/api/comment.go#L7-L20
+type commentoComment struct {
+	CommentHex   string    `json:"commentHex"`
+	Domain       string    `json:"domain,omitempty"`
+	Path         string    `json:"url,omitempty"`
+	CommenterHex string    `json:"commenterHex"`
+	Markdown     string    `json:"markdown"`
+	HTML         string    `json:"html"`
+	ParentHex    string    `json:"parentHex"`
+	Score        int       `json:"score"`
+	State        string    `json:"state,omitempty"`
+	CreationDate time.Time `json:"creationDate"`
+	Direction    int       `json:"direction"`
+	Deleted      bool      `json:"deleted"`
+}
+
+// Credit: https://gitlab.com/commento/commento/-/blob/master/api/commenter.go#L7-L16
+type commentoCommenter struct {
+	CommenterHex string    `json:"commenterHex,omitempty"`
+	Email        string    `json:"email,omitempty"`
+	Name         string    `json:"name"`
+	Link         string    `json:"link"`
+	Photo        string    `json:"photo"`
+	Provider     string    `json:"provider,omitempty"`
+	JoinDate     time.Time `json:"joinDate,omitempty"`
+	IsModerator  bool      `json:"isModerator"`
+}
+
+// Import comments from Commento and save to store
+func (d *Commento) Import(r io.Reader, siteID string) (size int, err error) {
+	if e := d.DataStore.DeleteAll(siteID); e != nil {
+		return 0, e
+	}
+
+	commentsCh := d.convert(r, siteID)
+	failed, passed := 0, 0
+	for c := range commentsCh {
+		if _, err = d.DataStore.Create(c); err != nil {
+			failed++
+			continue
+		}
+		passed++
+	}
+
+	if failed > 0 {
+		err = errors.Errorf("failed to save %d comments", failed)
+		if passed == 0 {
+			err = errors.New("import failed")
+		}
+	}
+
+	log.Printf("[DEBUG] imported %d comments to site %s", passed, siteID)
+
+	return passed, err
+}
+
+func (d *Commento) convert(r io.Reader, siteID string) (ch chan store.Comment) {
+	commentsCh := make(chan store.Comment)
+
+	decoder := json.NewDecoder(r)
+
+	go func() {
+
+		var exportedData commentoExport
+		err := decoder.Decode(&exportedData)
+		if err != nil {
+			log.Printf("[WARN] can't decode commento export json, %s", err.Error())
+		}
+
+		usersMap := map[string]store.User{}
+		for _, commenter := range exportedData.Commenters {
+			usersMap[commenter.CommenterHex] = store.User{
+				Name:    commenter.Name,
+				ID:      "commento_" + store.EncodeID(commenter.CommenterHex),
+				Picture: commenter.Photo,
+			}
+		}
+
+		for _, comment := range exportedData.Comments {
+			u, ok := usersMap[comment.CommenterHex]
+			if !ok {
+				continue
+			}
+
+			if comment.Deleted {
+				continue
+			}
+
+			c := store.Comment{
+				ID: comment.CommentHex,
+				Locator: store.Locator{
+					URL:    comment.Path,
+					SiteID: siteID,
+				},
+				User:      u,
+				Text:      comment.Markdown,
+				Timestamp: comment.CreationDate,
+				ParentID:  comment.ParentHex,
+				Imported:  true,
+			}
+
+			commentsCh <- c
+		}
+
+		close(commentsCh)
+	}()
+
+	return commentsCh
+}

backend/app/migrator/commento_test.go

@@ -0,0 +1,53 @@
+package migrator
+
+import (
+	"os"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/admin"
+	"github.com/umputun/remark42/backend/app/store/engine"
+	"github.com/umputun/remark42/backend/app/store/service"
+	bolt "go.etcd.io/bbolt"
+)
+
+func TestCommento_Import(t *testing.T) {
+	defer os.Remove("/tmp/remark-test.db")
+	b, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{FileName: "/tmp/remark-test.db", SiteID: "test"})
+	require.NoError(t, err, "create store")
+	dataStore := service.DataStore{Engine: b, AdminStore: admin.NewStaticStore("12345", nil, []string{}, "")}
+	defer dataStore.Close()
+
+	d := Commento{DataStore: &dataStore}
+	fh, err := os.Open("testdata/commento.json")
+	require.NoError(t, err)
+	size, err := d.Import(fh, "test")
+	assert.NoError(t, err)
+	assert.Equal(t, 2, size)
+
+	last, err := dataStore.Last("test", 10, time.Time{}, adminUser)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(last), "2 comments imported")
+
+	t.Log(last[0])
+
+	c := last[0] // last reverses, get first one
+	assert.Equal(t, "Great reply!", c.Text)
+	assert.Equal(t, "ea5f7bcd6ac9bb7b657f7d0569831104e1bcf9c253d03c1e16bf9654c49a5ce9", c.ID)
+	assert.Equal(t, "7d77e39fcd813241d6281478cc8f21ab5f807d043c750bc1a936bc23b34fb854", c.ParentID)
+	assert.Equal(t, store.Locator{SiteID: "test", URL: "https://example.com/blog/post/1"}, c.Locator)
+	assert.Equal(t, "Saturnin Uf", c.User.Name)
+	assert.Equal(t, "commento_35369aeb6ac5255de30410a0f86dc71eb9c6d0ca", c.User.ID)
+	assert.True(t, c.Imported)
+
+	posts, err := dataStore.List("test", 0, 0)
+	assert.NoError(t, err)
+	assert.Equal(t, 1, len(posts), "1 post")
+
+	count, err := dataStore.Count(store.Locator{SiteID: "test", URL: "https://example.com/blog/post/1"})
+	assert.NoError(t, err)
+	assert.Equal(t, 2, count)
+}

backend/app/migrator/disqus.go

@@ -9,7 +9,7 @@ import (
 	log "github.com/go-pkgz/lgr"
 	"github.com/pkg/errors"
 
-	"github.com/umputun/remark/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store"
 )
 
 // Disqus implements Importer from disqus xml
@@ -44,6 +44,7 @@ type disqusComment struct {
 	Tid            uid       `xml:"thread"`
 	Pid            uid       `xml:"parent"`
 	IsSpam         bool      `xml:"isSpam"`
+	Deleted        bool      `xml:"isDeleted"`
 }
 
 type uid struct {
@@ -52,9 +53,8 @@ type uid struct {
 
 // Import from disqus and save to store
 func (d *Disqus) Import(r io.Reader, siteID string) (size int, err error) {
-
-	if err = d.DataStore.DeleteAll(siteID); err != nil {
-		return 0, err
+	if e := d.DataStore.DeleteAll(siteID); e != nil {
+		return 0, e
 	}
 
 	commentsCh := d.convert(r, siteID)
@@ -88,9 +88,10 @@ func (d *Disqus) convert(r io.Reader, siteID string) (ch chan store.Comment) {
 	commentsCh := make(chan store.Comment)
 
 	stats := struct {
-		inpThreads, inpComments     int
-		commentsCount, spamComments int
-		failedThreads, failedPosts  int
+		inpThreads, inpComments          int
+		commentsCount, spamComments      int
+		failedThreads, failedPosts       int
+		deletedComments, skippedComments int
 	}{}
 
 	go func() {
@@ -100,8 +101,7 @@ func (d *Disqus) convert(r io.Reader, siteID string) (ch chan store.Comment) {
 				break
 			}
 
-			switch se := t.(type) {
-			case xml.StartElement:
+			if se, ok := t.(xml.StartElement); ok {
 				if se.Name.Local == "thread" {
 					stats.inpThreads++
 					thread := disqusThread{}
@@ -110,9 +110,13 @@ func (d *Disqus) convert(r io.Reader, siteID string) (ch chan store.Comment) {
 						stats.failedThreads++
 						continue
 					}
+					if thread.Deleted {
+						continue
+					}
 					postsMap[thread.UID] = thread.Link
 					continue
 				}
+
 				if se.Name.Local == "post" {
 					stats.inpComments++
 					comment := disqusComment{}
@@ -121,13 +125,24 @@ func (d *Disqus) convert(r io.Reader, siteID string) (ch chan store.Comment) {
 						stats.failedPosts++
 						continue
 					}
+					if comment.Deleted {
+						stats.deletedComments++
+						continue
+					}
 					if comment.IsSpam {
 						stats.spamComments++
 						continue
 					}
+
+					url, ok := postsMap[comment.Tid.Val]
+					if !ok {
+						stats.skippedComments++
+						continue
+					}
+
 					c := store.Comment{
 						ID:      comment.UID,
-						Locator: store.Locator{URL: postsMap[comment.Tid.Val], SiteID: siteID},
+						Locator: store.Locator{URL: url, SiteID: siteID},
 						User: store.User{
 							ID:   "disqus_" + store.EncodeID(comment.AuthorUserName),
 							Name: comment.AuthorName,
@@ -136,9 +151,10 @@ func (d *Disqus) convert(r io.Reader, siteID string) (ch chan store.Comment) {
 						Text:      d.cleanText(comment.Message),
 						Timestamp: comment.CreatedAt,
 						ParentID:  comment.Pid.Val,
+						Imported:  true,
 					}
-					if c.User.ID == "disqus_" { // empty comment.AuthorUserName from disqus
-						c.User.ID = "disqus_" + c.User.Name
+					if comment.AuthorUserName == "" { // empty comment.AuthorUserName from disqus
+						c.User.ID = "disqus_" + store.EncodeID(c.User.Name)
 					}
 					if c.ID == "" { // no comment.UID
 						c.ID = comment.ID
@@ -159,6 +175,7 @@ func (d *Disqus) convert(r io.Reader, siteID string) (ch chan store.Comment) {
 }
 
 func (*Disqus) cleanText(text string) string {
+	text = strings.TrimSpace(text)
 	text = strings.Replace(text, "\n", "", -1)
 	text = strings.Replace(text, "\t", "", -1)
 	return text

backend/app/migrator/disqus_test.go

@@ -6,29 +6,32 @@ import (
 	"testing"
 	"time"
 
-	bolt "github.com/coreos/bbolt"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	bolt "go.etcd.io/bbolt"
 
-	"github.com/umputun/remark/backend/app/store"
-	"github.com/umputun/remark/backend/app/store/admin"
-	"github.com/umputun/remark/backend/app/store/engine"
-	"github.com/umputun/remark/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/admin"
+	"github.com/umputun/remark42/backend/app/store/engine"
+	"github.com/umputun/remark42/backend/app/store/service"
 )
 
 func TestDisqus_Import(t *testing.T) {
 	defer os.Remove("/tmp/remark-test.db")
 	b, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{FileName: "/tmp/remark-test.db", SiteID: "test"})
-	require.Nil(t, err, "create store")
-	dataStore := service.DataStore{Interface: b, AdminStore: admin.NewStaticStore("12345", []string{}, "")}
+	require.NoError(t, err, "create store")
+	dataStore := service.DataStore{Engine: b, AdminStore: admin.NewStaticStore("12345", nil, []string{}, "")}
+	defer dataStore.Close()
 	d := Disqus{DataStore: &dataStore}
-	size, err := d.Import(strings.NewReader(xmlTestDisqus), "test")
-	assert.Nil(t, err)
+	fh, err := os.Open("testdata/disqus.xml")
+	require.NoError(t, err)
+	size, err := d.Import(fh, "test")
+	assert.NoError(t, err)
 	assert.Equal(t, 4, size)
 
-	last, err := dataStore.Last("test", 10)
-	assert.Nil(t, err)
-	assert.Equal(t, 4, len(last), "4 comments imported")
+	last, err := dataStore.Last("test", 10, time.Time{}, adminUser)
+	assert.NoError(t, err)
+	require.Equal(t, 4, len(last), "4 comments imported")
 
 	c := last[len(last)-1] // last reverses, get first one
 	assert.True(t, strings.HasPrefix(c.Text, "<p>The quick brown fox"))
@@ -38,25 +41,92 @@ func TestDisqus_Import(t *testing.T) {
 	assert.Equal(t, "Alexander Blah", c.User.Name)
 	assert.Equal(t, "disqus_328c8b68974aef73785f6b38c3d3fedfdf941434", c.User.ID)
 	assert.Equal(t, "2ba6b71dbf9750ae3356cce14cac6c1b1962747c", c.User.IP)
+	assert.True(t, c.Imported)
+
+	c = last[1] // get comment with empty username
+	assert.Equal(t, "No Username", c.User.Name)
+	assert.Equal(t, "disqus_62e24ea213756cda0339e1074819f15e25214361", c.User.ID)
 
 	posts, err := dataStore.List("test", 0, 0)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 2, len(posts), "2 posts")
 
 	count, err := dataStore.Count(store.Locator{SiteID: "test", URL: "https://radio-t.com/p/2011/03/05/podcast-229/"})
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 2, count)
 }
 
+func TestDisqus_ImportDeletedThread(t *testing.T) {
+	defer os.Remove("/tmp/remark-test.db")
+	b, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{FileName: "/tmp/remark-test.db", SiteID: "test"})
+	require.NoError(t, err, "create store")
+	dataStore := service.DataStore{Engine: b, AdminStore: admin.NewStaticStore("12345", nil, []string{}, "")}
+	defer dataStore.Close()
+	d := Disqus{DataStore: &dataStore}
+	fh, err := os.Open("testdata/disqus-deleted-thread.xml")
+	require.NoError(t, err)
+	size, err := d.Import(fh, "test")
+	assert.NoError(t, err)
+	assert.Equal(t, 2, size)
+
+	last, err := dataStore.Last("test", 10, time.Time{}, adminUser)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(last), "2 comments imported")
+
+	c := last[len(last)-1] // last reverses, get first one
+	assert.True(t, strings.HasPrefix(c.Text, "<p>Google App Engine "), c.Text)
+	assert.Equal(t, "299986072", c.ID)
+	assert.Equal(t, "", c.ParentID)
+	assert.Equal(t, store.Locator{SiteID: "test", URL: "http://radio-t.umputun.com/2011/03/229_8880.html"}, c.Locator)
+	assert.Equal(t, "No Username", c.User.Name)
+	assert.Equal(t, "disqus_62e24ea213756cda0339e1074819f15e25214361", c.User.ID)
+	assert.Equal(t, "7001968ea3f6c9013a9f0a3650f200c10c927638", c.User.IP)
+	assert.True(t, c.Imported)
+
+	c = last[1] // get comment with empty username
+	assert.Equal(t, "No Username", c.User.Name)
+	assert.Equal(t, "disqus_62e24ea213756cda0339e1074819f15e25214361", c.User.ID)
+}
+
+func TestDisqus_ImportDeletedPost(t *testing.T) {
+	defer os.Remove("/tmp/remark-test.db")
+	b, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{FileName: "/tmp/remark-test.db", SiteID: "test"})
+	require.NoError(t, err, "create store")
+	dataStore := service.DataStore{Engine: b, AdminStore: admin.NewStaticStore("12345", nil, []string{}, "")}
+	defer dataStore.Close()
+	d := Disqus{DataStore: &dataStore}
+	fh, err := os.Open("testdata/disqus-deleted-post.xml")
+	require.NoError(t, err)
+	size, err := d.Import(fh, "test")
+	assert.NoError(t, err)
+	assert.Equal(t, 3, size, "1 post deleted")
+
+	last, err := dataStore.Last("test", 10, time.Time{}, adminUser)
+	assert.NoError(t, err)
+	require.Equal(t, 3, len(last), "3 comments imported")
+
+	c := last[len(last)-1] // last reverses, get first one
+	assert.True(t, strings.HasPrefix(c.Text, "<p>Microsoft "), c.Text)
+	assert.Equal(t, "299744309", c.ID)
+	assert.Equal(t, "", c.ParentID)
+	assert.Equal(t, store.Locator{SiteID: "test", URL: "https://radio-t.com/p/2011/03/05/podcast-229/"}, c.Locator)
+	assert.Equal(t, "mikhail", c.User.Name)
+	assert.Equal(t, "disqus_1b6709749c0cab163db9070cc4edf3322b398d8c", c.User.ID)
+	assert.Equal(t, "9d3657a95a4e341510404bd8bf1a363faefd4ba4", c.User.IP)
+	assert.True(t, c.Imported)
+}
+
 func TestDisqus_Convert(t *testing.T) {
 	d := Disqus{}
-	ch := d.convert(strings.NewReader(xmlTestDisqus), "test")
+	fh, err := os.Open("testdata/disqus.xml")
+	require.NoError(t, err)
+	ch := d.convert(fh, "test")
 
 	res := []store.Comment{}
 	for comment := range ch {
 		res = append(res, comment)
 	}
-	assert.Equal(t, 4, len(res), "4 comments total, 1 spam excluded, 1 bad excluded")
+	require.Equal(t, 4, len(res), "4 comments total, 1 spam excluded, 1 bad excluded")
 
 	exp0 := store.Comment{
 		ID: "299619020",
@@ -70,160 +140,8 @@ func TestDisqus_Convert(t *testing.T) {
 			ID:   "disqus_328c8b68974aef73785f6b38c3d3fedfdf941434",
 			IP:   "178.178.178.178",
 		},
+		Imported: true,
 	}
 	exp0.Timestamp, _ = time.Parse("2006-01-02T15:04:05Z", "2011-08-31T15:16:29Z")
 	assert.Equal(t, exp0, res[0])
 }
-
-var xmlTestDisqus = `<?xml version="1.0" encoding="utf-8"?>
-<disqus xmlns="http://disqus.com" xmlns:dsq="http://disqus.com/disqus-internals" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://disqus.com/api/schemas/1.0/disqus.xsd http://disqus.com/api/schemas/1.0/disqus-internals.xsd">
-
-	<category dsq:id="707279">
-		<forum>radiot</forum>
-		<title>General</title>
-		<isDefault>true</isDefault>
-	</category>
-
-	<thread dsq:id="247918464">
-		<id/>
-		<forum>radiot</forum>
-		<category dsq:id="707279"/>
-		<link>http://radio-t.umputun.com/2011/03/229_8880.html</link>
-		<title>Радио-Т: Радио-Т 229</title>
-		<message/>
-		<createdAt>2011-03-07T20:46:25Z</createdAt>
-		<author>
-			<email>umputun@gmail.com</email>
-			<name>Umputun</name>
-			<isAnonymous>false</isAnonymous>
-			<username>umputun</username>
-		</author>
-		<ipAddress>98.212.28.115</ipAddress>
-		<isClosed>false</isClosed>
-		<isDeleted>false</isDeleted>
-	</thread>
-
-	<thread dsq:id="247937687">
-		<id>http://www.radio-t.com/p/2011/03/05/podcast-229/</id>
-		<forum>radiot</forum>
-		<category dsq:id="707279"/>
-		<link>https://radio-t.com/p/2011/03/05/podcast-229/</link>
-		<title>Радио-Т: Радио-Т 229</title>
-		<message/>
-		<createdAt>2011-03-07T21:17:17Z</createdAt>
-		<author>
-			<email>umputun@gmail.com</email>
-			<name>Umputun</name>
-			<isAnonymous>false</isAnonymous>
-			<username>umputun</username>
-		</author>
-		<ipAddress>80.250.214.235</ipAddress>
-		<isClosed>true</isClosed>
-		<isDeleted>false</isDeleted>
-	</thread>
-
-
-	<post dsq:id="299619020">
-		<id>3565798471341011339</id>
-		<message>
-			<![CDATA[<p>The quick brown fox jumps over the lazy dog.</p><p><a href="https://https://radio-t.com" rel="nofollow noopener" title="radio-t">some link</a></p>]]>
-		</message>
-		<createdAt>2011-08-31T15:16:29Z</createdAt>
-		<isDeleted>false</isDeleted>
-		<isSpam>false</isSpam>
-		<author>
-			<email/>
-			<name>Alexander Blah</name>
-			<isAnonymous>false</isAnonymous>
-			<username>facebook-1787732238</username>
-		</author>
-		<ipAddress>178.178.178.178</ipAddress>
-		<thread dsq:id="247937687"/>
-	</post>
-
-	<post dsq:id="299744309">
-		<id>3029154520436241933</id>
-		<message>
-			<![CDATA[<p>Microsoft показал проводник Windows 8 с ленточным интерфейсом.</p><p><a href="http://blogs.msdn.com/b/b8/archive/2011/08/29/improvements-in-windows-explorer.aspx" rel="nofollow noopener" title="http://blogs.msdn.com/b/b8/archive/2011/08/29/improvements-in-windows-explorer.aspx">http://blogs.msdn.com/b/b8/...</a> </p>]]>
-		</message>
-		<createdAt>2011-08-31T17:44:22Z</createdAt>
-		<isDeleted>false</isDeleted>
-		<isSpam>false</isSpam>
-		<author>
-			<email>mihail.noname@gmail.com</email>
-			<name>mikhail</name>
-			<isAnonymous>false</isAnonymous>
-			<username>mikhail-noname</username>
-		</author>
-		<ipAddress>195.195.195.139</ipAddress>
-		<thread dsq:id="247937687"/>
-	</post>
-
-	<post dsq:id="299986072">
-		<id>6580890074280459209</id>
-		<message>
-			<![CDATA[<p>Google App Engine скоро выходит из превью статуса.</p><p>Сейчас письмо пришло от гугла.</p><p>Для платных приложений использущих High Replication Datastore (HRD) будет 99.95% uptime SLA.<br>Будут Премьер аккаунты за 500 баксов/месяц с оперативной поддержкой и любым количеством приложений на аккаунте (+ плата за потребленные ресурсы).<br>В связи с переходом на новую систему оплаты, обещают снизить бесплатные квоты.<br>Всем кто включит биллинг до 31 октября, обещают 50 баксов :)</p>]]>
-		</message>
-		<createdAt>2011-08-31T22:48:43Z</createdAt>
-		<isDeleted>false</isDeleted>
-		<isSpam>false</isSpam>
-		<author>
-			<email>dmitri.noname@gmail.com</email>
-			<name>Dmitry Noname</name>
-			<isAnonymous>false</isAnonymous>
-			<username>google-74b9e7568ef6860e93862c5d77590123</username>
-		</author>
-		<ipAddress>89.89.89.139</ipAddress>
-		<thread dsq:id="247918464"/>
-	</post>
-
-	<post>
-		<id>12345678890</id>
-		<message>This comment had no ID</message>
-		<createdAt>2011-08-31T22:49:43Z</createdAt>
-		<forum>radiot</forum>
-		<isDeleted>false</isDeleted>
-		<isSpam>false</isSpam>
-		<author>
-			<email>blah.noname@gmail.com</email>
-			<name>Blah Noname</name>
-			<isAnonymous>false</isAnonymous>
-			<username>74b9e7568ef6860e93862c5d77590123</username>
-		</author>
-		<ipAddress>189.89.89.139</ipAddress>
-		<thread dsq:id="247918464"/>
-	</post>
-
-	<post dsq:id="299986073">
-		<id>6580890074280459219</id>
-		<message>some ugly spam</message>
-		<createdAt>2011-09-30T22:48:43Z</createdAt>
-		<isDeleted>false</isDeleted>
-		<isSpam>true</isSpam>
-		<author>
-			<email>spam.noname@gmail.com</email>
-			<name>Spam Noname</name>
-			<isAnonymous>false</isAnonymous>
-			<username>google-2c5d77590123</username>
-		</author>
-		<ipAddress>189.89.89.139</ipAddress>
-		<thread dsq:id="247937687"/>
-	</post>
-
-	<post dsq:id="x299986073">
-		<message>some bad comment</message>
-		<createdAt>2011-x09-30T22:48:43Z</createdAt>
-		<isDeleted>false</isDeleted>
-		<isSpam>123</isSpam>
-		<author>
-			<email>noname@gmail.com</email>
-			<name>Noname</name>
-			<isAnonymous>true</isAnonymous>
-			<username>google-2c5d77590123</username>
-		</author>
-		<ipAddress>189.89.89.39</ipAddress>
-		<thread dsq:id=247937687/>
-	</post>
-
-</disqus>
-`

backend/app/migrator/mapper.go

@@ -0,0 +1,73 @@
+package migrator
+
+import (
+	"errors"
+	"io"
+	"strings"
+)
+
+// URLMapper implements Mapper interface
+type URLMapper struct {
+	rules map[string]string
+}
+
+// NewURLMapper reads rules from given reader and returns initialized URLMapper
+// if given rules are valid.
+func NewURLMapper(reader io.Reader) (Mapper, error) {
+	u := &URLMapper{}
+	if err := u.loadRules(reader); err != nil {
+		return u, err
+	}
+	return u, nil
+}
+
+// loadRules loads url-mapping rules from reader to mapper.
+// Rules must be a text consists of rows separated by \n.
+// Each row holds from-url and to-url separated by space.
+// If urls end with asterisk (*) it means try to match by prefix.
+// Example:
+// https://www.myblog.com/blog/1/ https://myblog.com/blog/1/
+// https://www.myblog.com/* https://myblog.com/*
+func (u *URLMapper) loadRules(reader io.Reader) error {
+	data, err := io.ReadAll(reader)
+	if err != nil {
+		return err
+	}
+
+	rulesText := strings.TrimSpace(string(data))
+
+	u.rules = make(map[string]string)
+
+	for _, row := range strings.Split(rulesText, "\n") {
+		row = strings.TrimSpace(row)
+		urls := strings.Split(row, " ")
+		if len(urls) != 2 {
+			return errors.New("bad row " + row)
+		}
+
+		from, to := strings.TrimSpace(urls[0]), strings.TrimSpace(urls[1])
+		u.rules[from] = to
+	}
+	return nil
+}
+
+// URL maps given url to another url according loaded url-rules.
+// If not matched returns given url.
+func (u *URLMapper) URL(url string) string {
+	if newURL, ok := u.rules[url]; ok {
+		return newURL
+	}
+	// try to match by prefix
+	for oldURL, newURL := range u.rules {
+		if !strings.HasSuffix(oldURL, "*") {
+			continue
+		}
+		oldURL = strings.TrimSuffix(oldURL, "*")
+		newURL = strings.TrimSuffix(newURL, "*")
+		if strings.HasPrefix(url, oldURL) {
+			return newURL + strings.TrimPrefix(url, oldURL)
+		}
+	}
+	// search failed, return given url
+	return url
+}

backend/app/migrator/mapper_test.go

@@ -0,0 +1,90 @@
+package migrator
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestUrlMapper_URL(t *testing.T) {
+	// want remap urls from https://radio-t.com to https://www.radio-t.com
+	// also map individual urls
+	rules := strings.NewReader(`
+https://radio-t.com* https://www.radio-t.com*
+https://radio-t.com/p/2018/09/22////podcast-616/ https://www.radio-t.com/p/2018/09/22/podcast-616/
+https://radio-t.com/p/2018/09/22/podcast-616/?with_query=1 https://www.radio-t.com/p/2018/09/22/podcast-616/
+`)
+
+	mapper, err := NewURLMapper(rules)
+	assert.NoError(t, err)
+
+	// if url not matched mapper should return given url
+	assert.Equal(t, "https://any.com/post/1/", mapper.URL("https://any.com/post/1/"))
+	assert.Equal(t, "https://radio-t.co", mapper.URL("https://radio-t.co"))
+	// check strict matching
+	assert.Equal(t, "https://www.radio-t.com/p/2018/09/22/podcast-616/", mapper.URL("https://radio-t.com/p/2018/09/22////podcast-616/"))
+	assert.Equal(t, "https://www.radio-t.com/p/2018/09/22/podcast-616/", mapper.URL("https://radio-t.com/p/2018/09/22/podcast-616/?with_query=1"))
+	// check pattern matching (by prefix)
+	assert.Equal(t, "https://www.radio-t.com/p/post/123/", mapper.URL("https://radio-t.com/p/post/123/"))
+
+	// want remap from http to https
+	rules = strings.NewReader(`http://anysite.com/p/123 https://anysite.com/p/321`)
+	mapper, err = NewURLMapper(rules)
+	assert.NoError(t, err)
+	assert.Equal(t, "https://anysite.com/p/321", mapper.URL("http://anysite.com/p/123"))
+	assert.Equal(t, "https://notexist", mapper.URL("https://notexist"))
+	assert.Equal(t, "https://anysite.com/", mapper.URL("https://anysite.com/")) // not exist
+
+	// want remap from http to https by pattern
+	rules = strings.NewReader(`http://anysite.com* https://anysite.com*`)
+	mapper, err = NewURLMapper(rules)
+	assert.NoError(t, err)
+	assert.Equal(t, "https://anysite.com/p/1", mapper.URL("http://anysite.com/p/1"))
+	assert.Equal(t, "https://anysite.com/", mapper.URL("http://anysite.com/"))
+	assert.Equal(t, "https://notexist", mapper.URL("https://notexist"))
+}
+
+func TestUrlMapper_New(t *testing.T) {
+	cases := []struct {
+		rules       string
+		expectError bool
+	}{
+		// bad input, expect error
+		{
+			rules:       "https://radio-t.com ",
+			expectError: true,
+		},
+		{
+			rules:       "https://radio-t.com https://radio-t.com https://radio-t.com",
+			expectError: true,
+		},
+		{
+			rules:       "https://radio-t.com https://radio-t.com\n https://radio-t.com",
+			expectError: true,
+		},
+		{
+			rules:       "https://radio-t.com   \n https://radio-t.com https://radio-t.com",
+			expectError: true,
+		},
+
+		// valid input, no error
+		{
+			rules: "https://radio-t.com* https://www.radio-t.com*",
+		},
+		{
+			rules: "https://radio-t.com/p/2018/09/22/podcast-616/?with_query=1 https://www.radio-t.com/p/2018/09/22/podcast-616/",
+		},
+		{
+			rules: "https://any.com/p/111 https://any.com/p/222   \n https://any.com/p/333 https://any.com/p/222   \n",
+		},
+	}
+	for _, c := range cases {
+		_, err := NewURLMapper(strings.NewReader(c.rules))
+		if c.expectError {
+			assert.Error(t, err)
+		} else {
+			assert.NoError(t, err)
+		}
+	}
+}

backend/app/migrator/migrator.go

@@ -10,8 +10,8 @@ import (
 	log "github.com/go-pkgz/lgr"
 	"github.com/pkg/errors"
 
-	"github.com/umputun/remark/backend/app/store"
-	"github.com/umputun/remark/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/service"
 )
 
 // Importer defines interface to convert posts from external sources
@@ -24,10 +24,20 @@ type Exporter interface {
 	Export(w io.Writer, siteID string) (int, error)
 }
 
+// Mapper defines interface to convert data in import procedure
+type Mapper interface {
+	URL(url string) string
+}
+
+// MapperMaker defines function that reads rules from reader and
+// returns new Mapper with loaded rules. If rules are not valid
+// it returns error.
+type MapperMaker func(reader io.Reader) (Mapper, error)
+
 // Store defines minimal interface needed to export and import comments
 type Store interface {
 	Create(comment store.Comment) (commentID string, err error)
-	Find(locator store.Locator, sort string) ([]store.Comment, error)
+	Find(locator store.Locator, sort string, user store.User) ([]store.Comment, error)
 	List(siteID string, limit int, skip int) ([]store.PostInfo, error)
 	DeleteAll(siteID string) error
 	Metas(siteID string) (umetas []service.UserMetaData, pmetas []service.PostMetaData, err error)
@@ -42,6 +52,8 @@ type ImportParams struct {
 	SiteID    string
 }
 
+var adminUser = store.User{Admin: true}
+
 // ImportComments imports from given provider format and saves to store
 func ImportComments(p ImportParams) (int, error) {
 	log.Printf("[INFO] import from %s (%s) to %s", p.InputFile, p.Provider, p.SiteID)
@@ -52,6 +64,8 @@ func ImportComments(p ImportParams) (int, error) {
 		importer = &Disqus{DataStore: p.DataStore}
 	case "wordpress":
 		importer = &WordPress{DataStore: p.DataStore}
+	case "commento":
+		importer = &Commento{DataStore: p.DataStore}
 	case "native":
 		importer = &Native{DataStore: p.DataStore}
 	default:
@@ -63,7 +77,7 @@ func ImportComments(p ImportParams) (int, error) {
 		return 0, errors.Wrapf(err, "can't open import file %s", p.InputFile)
 	}
 
-	defer func() {
+	defer func() { //nolint:gosec // false positive on defer without error check when it's checked here
 		if err = fh.Close(); err != nil {
 			log.Printf("[WARN] can't close %s, %s", p.InputFile, err)
 		}

backend/app/migrator/migrator_test.go

@@ -1,42 +1,38 @@
 package migrator
 
 import (
-	"io/ioutil"
 	"os"
 	"testing"
+	"time"
 
-	bolt "github.com/coreos/bbolt"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	bolt "go.etcd.io/bbolt"
 
-	"github.com/umputun/remark/backend/app/store/admin"
-	"github.com/umputun/remark/backend/app/store/engine"
-	"github.com/umputun/remark/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/admin"
+	"github.com/umputun/remark42/backend/app/store/engine"
+	"github.com/umputun/remark42/backend/app/store/service"
 )
 
 func TestMigrator_ImportDisqus(t *testing.T) {
-	defer func() {
-		os.Remove("/tmp/remark-test.db")
-		os.Remove("/tmp/disqus-test.xml")
-	}()
-
-	err := ioutil.WriteFile("/tmp/disqus-test.xml", []byte(xmlTestDisqus), 0600)
-	require.Nil(t, err)
+	defer os.Remove("/tmp/remark-test.db")
 
 	b, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{FileName: "/tmp/remark-test.db", SiteID: "test"})
-	require.Nil(t, err, "create store")
-	dataStore := &service.DataStore{Interface: b, AdminStore: admin.NewStaticStore("12345", []string{}, "")}
+	require.NoError(t, err, "create store")
+	dataStore := &service.DataStore{Engine: b, AdminStore: admin.NewStaticStore("12345", nil, []string{}, "")}
+	defer dataStore.Close()
 	size, err := ImportComments(ImportParams{
 		DataStore: dataStore,
-		InputFile: "/tmp/disqus-test.xml",
+		InputFile: "testdata/disqus.xml",
 		SiteID:    "test",
 		Provider:  "disqus",
 	})
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 4, size)
 
-	last, err := dataStore.Last("test", 10)
-	assert.Nil(t, err)
+	last, err := dataStore.Last("test", 10, time.Time{}, store.User{})
+	assert.NoError(t, err)
 	assert.Equal(t, 4, len(last), "4 comments imported")
 }
 
@@ -46,26 +42,48 @@ func TestMigrator_ImportWordPress(t *testing.T) {
 		os.Remove("/tmp/wordpress-test.xml")
 	}()
 
-	err := ioutil.WriteFile("/tmp/wordpress-test.xml", []byte(xmlTestWP), 0600)
-	require.Nil(t, err)
+	err := os.WriteFile("/tmp/wordpress-test.xml", []byte(xmlTestWP), 0o600)
+	require.NoError(t, err)
 
 	b, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{FileName: "/tmp/remark-test.db", SiteID: "test"})
-	require.Nil(t, err, "create store")
-	dataStore := &service.DataStore{Interface: b, AdminStore: admin.NewStaticStore("12345", []string{}, "")}
+	require.NoError(t, err, "create store")
+	dataStore := &service.DataStore{Engine: b, AdminStore: admin.NewStaticStore("12345", nil, []string{}, "")}
+	defer dataStore.Close()
 	size, err := ImportComments(ImportParams{
 		DataStore: dataStore,
 		InputFile: "/tmp/wordpress-test.xml",
 		SiteID:    "test",
 		Provider:  "wordpress",
 	})
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 3, size)
 
-	last, err := dataStore.Last("test", 10)
-	assert.Nil(t, err)
+	last, err := dataStore.Last("test", 10, time.Time{}, store.User{})
+	assert.NoError(t, err)
 	assert.Equal(t, 3, len(last), "3 comments imported")
 }
 
+func TestMigrator_ImportCommento(t *testing.T) {
+	defer os.Remove("/tmp/remark-test.db")
+
+	b, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{FileName: "/tmp/remark-test.db", SiteID: "test"})
+	require.NoError(t, err, "create store")
+	dataStore := &service.DataStore{Engine: b, AdminStore: admin.NewStaticStore("12345", nil, []string{}, "")}
+	defer dataStore.Close()
+	size, err := ImportComments(ImportParams{
+		DataStore: dataStore,
+		InputFile: "testdata/commento.json",
+		SiteID:    "test",
+		Provider:  "commento",
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, 2, size)
+
+	last, err := dataStore.Last("test", 10, time.Time{}, store.User{})
+	assert.NoError(t, err)
+	assert.Equal(t, 2, len(last), "2 comments imported")
+}
+
 func TestMigrator_ImportNative(t *testing.T) {
 	defer func() {
 		os.Remove("/tmp/remark-test.db")
@@ -75,12 +93,13 @@ func TestMigrator_ImportNative(t *testing.T) {
 	data := `{"version":1} {"id":"efbc17f177ee1a1c0ee6e1e025749966ec071adc","pid":"","text":"some text, <a href=\"http://radio-t.com\" rel=\"nofollow\">link</a>","user":{"name":"user name","id":"user1","picture":"","profile":"","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com"},"score":0,"votes":{},"time":"2017-12-20T15:18:22-06:00"}` + "\n" +
 		`{"id":"afbc17f177ee1a1c0ee6e1e025749966ec071adc","pid":"efbc17f177ee1a1c0ee6e1e025749966ec071adc","text":"some text2, <a href=\"http://radio-t.com\" rel=\"nofollow\">link</a>","user":{"name":"user name","id":"user1","picture":"","profile":"","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com"},"score":0,"votes":{},"time":"2017-12-20T15:18:23-06:00"}` + "\n"
 
-	err := ioutil.WriteFile("/tmp/disqus-test.r42", []byte(data), 0600)
-	require.Nil(t, err)
+	err := os.WriteFile("/tmp/disqus-test.r42", []byte(data), 0o600)
+	require.NoError(t, err)
 
 	b, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{FileName: "/tmp/remark-test.db", SiteID: "radio-t"})
-	require.Nil(t, err, "create store")
-	dataStore := &service.DataStore{Interface: b, AdminStore: admin.NewStaticStore("12345", []string{}, "")}
+	require.NoError(t, err, "create store")
+	dataStore := &service.DataStore{Engine: b, AdminStore: admin.NewStaticStore("12345", nil, []string{}, "")}
+	defer dataStore.Close()
 
 	size, err := ImportComments(ImportParams{
 		DataStore: dataStore,
@@ -88,19 +107,20 @@ func TestMigrator_ImportNative(t *testing.T) {
 		SiteID:    "radio-t",
 		Provider:  "native",
 	})
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 2, size)
 
-	last, err := dataStore.Last("radio-t", 10)
-	assert.Nil(t, err)
+	last, err := dataStore.Last("radio-t", 10, time.Time{}, store.User{})
+	assert.NoError(t, err)
 	assert.Equal(t, 2, len(last), "2 comments imported")
 }
 
 func TestMigrator_ImportFailed(t *testing.T) {
 	defer os.Remove("/tmp/remark-test.db")
 	b, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{FileName: "/tmp/remark-test.db", SiteID: "test"})
-	require.Nil(t, err, "create store")
-	dataStore := &service.DataStore{Interface: b}
+	require.NoError(t, err, "create store")
+	dataStore := &service.DataStore{Engine: b}
+	defer dataStore.Close()
 	_, err = ImportComments(ImportParams{
 		DataStore: dataStore,
 		InputFile: "/tmp/disqus-test.xml",

backend/app/migrator/native.go

@@ -11,8 +11,8 @@ import (
 	"github.com/go-pkgz/syncs"
 	"github.com/pkg/errors"
 
-	"github.com/umputun/remark/backend/app/store"
-	"github.com/umputun/remark/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/service"
 )
 
 const nativeVersion = 1
@@ -49,7 +49,7 @@ func (n *Native) Export(w io.Writer, siteID string) (size int, err error) {
 	commentsCount := 0
 	for i := len(topics) - 1; i >= 0; i-- { // topics from List sorted in opposite direction
 		topic := topics[i]
-		comments, e := n.DataStore.Find(store.Locator{SiteID: siteID, URL: topic.URL}, "time")
+		comments, e := n.DataStore.Find(store.Locator{SiteID: siteID, URL: topic.URL}, "time", adminUser)
 		if e != nil {
 			return commentsCount, e
 		}
@@ -87,9 +87,49 @@ func (n *Native) exportMeta(siteID string, w io.Writer) (err error) {
 	return nil
 }
 
+// WithMapper wraps reader with url-mapper.
+func WithMapper(reader io.Reader, mapper Mapper) io.Reader {
+	r, w := io.Pipe()
+	go func() {
+		var err error
+		defer func() {
+			log.Printf("[DEBUG] finish write to pipe with %+v", err)
+			if e := w.Close(); e != nil {
+				log.Printf("[WARN] failed close pipe writer with %+v", e)
+			}
+		}()
+
+		// decode from reader and encode to pipe writer
+		dec, enc := json.NewDecoder(reader), json.NewEncoder(w)
+
+		m := meta{}
+		if err = dec.Decode(&m); err != nil {
+			return
+		}
+		for i := range m.Posts {
+			m.Posts[i].URL = mapper.URL(m.Posts[i].URL)
+		}
+		if err = enc.Encode(m); err != nil {
+			return
+		}
+
+		for {
+			comment := store.Comment{}
+			if err = dec.Decode(&comment); err != nil {
+				return
+			}
+			comment.Locator.URL = mapper.URL(comment.Locator.URL)
+			if err = enc.Encode(comment); err != nil {
+				return
+			}
+		}
+	}()
+
+	return r
+}
+
 // Import comments from json strings produced by Remark.Export
 func (n *Native) Import(reader io.Reader, siteID string) (size int, err error) {
-
 	m := meta{}
 	dec := json.NewDecoder(reader)
 	if err = dec.Decode(&m); err != nil {
@@ -100,8 +140,8 @@ func (n *Native) Import(reader io.Reader, siteID string) (size int, err error) {
 		return 0, errors.Errorf("unexpected import file version %d", m.Version)
 	}
 
-	if err = n.DataStore.DeleteAll(siteID); err != nil {
-		return 0, err
+	if e := n.DataStore.DeleteAll(siteID); e != nil {
+		return 0, e
 	}
 
 	var failed, total, comments int64
@@ -115,6 +155,7 @@ func (n *Native) Import(reader io.Reader, siteID string) (size int, err error) {
 	for {
 		comment := store.Comment{}
 		err = dec.Decode(&comment)
+		comment.Imported = true
 		if err == io.EOF {
 			break
 		}

backend/app/migrator/native_test.go

@@ -4,27 +4,25 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"math/rand"
 	"os"
 	"strings"
 	"testing"
 	"time"
 
-	bolt "github.com/coreos/bbolt"
-	log "github.com/go-pkgz/lgr"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	bolt "go.etcd.io/bbolt"
 
-	"github.com/umputun/remark/backend/app/store"
-	"github.com/umputun/remark/backend/app/store/admin"
-	"github.com/umputun/remark/backend/app/store/engine"
-	"github.com/umputun/remark/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/admin"
+	"github.com/umputun/remark42/backend/app/store/engine"
+	"github.com/umputun/remark42/backend/app/store/service"
 )
 
-var testDb = "/tmp/test-remark.db"
-
 func TestNative_Export(t *testing.T) {
-	defer os.Remove(testDb)
-	b := prep(t) // write 2 comments
+	b, teardown := prep(t) // write 2 comments
+	defer teardown()
 	assert.NoError(t, b.SetReadOnly(store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, true))
 	assert.NoError(t, b.SetVerified("radio-t", "user1", true))
 	assert.NoError(t, b.SetBlock("radio-t", "user2", true, time.Hour))
@@ -32,33 +30,33 @@ func TestNative_Export(t *testing.T) {
 
 	buf := &bytes.Buffer{}
 	size, err := r.Export(buf, "radio-t")
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 2, size)
 
 	c1 := buf.String()
-	log.Print(c1)
+	t.Log(c1)
 
 	dec := json.NewDecoder(strings.NewReader(c1))
 
-	meta := struct {
+	m := struct {
 		Version int                    `json:"version"`
 		Users   []service.UserMetaData `json:"users"`
 		Posts   []service.PostMetaData `json:"posts"`
 	}{}
 
-	require.NoError(t, dec.Decode(&meta), "decode meta")
+	require.NoError(t, dec.Decode(&m), "decode meta")
 
-	assert.Equal(t, 2, len(meta.Users))
-	assert.Equal(t, "user1", meta.Users[0].ID)
-	assert.Equal(t, false, meta.Users[0].Blocked.Status)
-	assert.Equal(t, true, meta.Users[0].Verified)
-	assert.Equal(t, "user2", meta.Users[1].ID)
-	assert.Equal(t, true, meta.Users[1].Blocked.Status)
-	assert.Equal(t, false, meta.Users[1].Verified)
+	require.Equal(t, 2, len(m.Users))
+	assert.Equal(t, "user1", m.Users[0].ID)
+	assert.Equal(t, false, m.Users[0].Blocked.Status)
+	assert.Equal(t, true, m.Users[0].Verified)
+	assert.Equal(t, "user2", m.Users[1].ID)
+	assert.Equal(t, true, m.Users[1].Blocked.Status)
+	assert.Equal(t, false, m.Users[1].Verified)
 
-	assert.Equal(t, 1, len(meta.Posts))
-	assert.Equal(t, "https://radio-t.com", meta.Posts[0].URL)
-	assert.Equal(t, true, meta.Posts[0].ReadOnly)
+	require.Equal(t, 1, len(m.Posts))
+	assert.Equal(t, "https://radio-t.com", m.Posts[0].URL)
+	assert.Equal(t, true, m.Posts[0].ReadOnly)
 
 	comments := [3]store.Comment{}
 
@@ -70,28 +68,70 @@ func TestNative_Export(t *testing.T) {
 }
 
 func TestNative_Import(t *testing.T) {
-	defer os.Remove(testDb)
+	b, teardown := prep(t) // write 2 comments
+	defer teardown()
 
 	inp := `{"version":1,"users":[{"id":"user1","blocked":{"status":false,"until":"0001-01-01T00:00:00Z"},"verified":true},{"id":"user2","blocked":{"status":true,"until":"2018-12-23T02:55:22.472041-06:00"},"verified":false}],"posts":[{"url":"https://radio-t.com","read_only":true}]}
 	{"id":"efbc17f177ee1a1c0ee6e1e025749966ec071adc","pid":"","text":"some text, <a href=\"http://radio-t.com\" rel=\"nofollow\">link</a>","user":{"name":"user name","id":"user1","picture":"","ip":"293ec5b0cf154855258824ec7fac5dc63d176915","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com"},"score":0,"votes":{},"time":"2017-12-20T15:18:22-06:00"}
-	{"id":"f863bd79-fec6-4a75-b308-61fe5dd02aa1","pid":"1234","text":"some text2","user":{"name":"user name","id":"user2","picture":"","ip":"293ec5b0cf154855258824ec7fac5dc63d176915","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com/2"},"score":0,"votes":{},"time":"2017-12-20T15:18:23-06:00"}`
+	{"id":"f863bd79-fec6-4a75-b308-61fe5dd02aa1","pid":"1234","text":"some text2","user":{"name":"user name","id":"user2","picture":"","ip":"293ec5b0cf154855258824ec7fac5dc63d176915","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com/2"},"score":0,"votes":{},"time":"2017-12-20T15:18:23-06:00","imported":false}`
 
-	b := prep(t) // write some recs
-	r := Native{DataStore: &service.DataStore{Interface: b, AdminStore: admin.NewStaticStore("12345", []string{}, "")}}
+	b.AdminStore = admin.NewStaticStore("12345", nil, []string{}, "")
+	r := Native{DataStore: b}
 	size, err := r.Import(strings.NewReader(inp), "radio-t")
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 2, size)
 
-	comments, err := b.Last("radio-t", 10)
-	assert.Nil(t, err)
-	assert.Equal(t, 2, len(comments))
+	comments, err := b.Last("radio-t", 10, time.Time{}, store.User{})
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(comments))
 	assert.Equal(t, "f863bd79-fec6-4a75-b308-61fe5dd02aa1", comments[0].ID)
 	assert.Equal(t, "1234", comments[0].ParentID)
 	assert.Equal(t, false, b.IsReadOnly(comments[0].Locator))
+	assert.True(t, comments[0].Imported)
 
 	assert.Equal(t, "efbc17f177ee1a1c0ee6e1e025749966ec071adc", comments[1].ID)
 	assert.Equal(t, "https://radio-t.com", comments[1].Locator.URL)
 	assert.Equal(t, true, b.IsReadOnly(comments[1].Locator))
+	assert.True(t, comments[1].Imported)
+
+	assert.Equal(t, false, b.IsBlocked("radio-t", "user1"))
+	assert.Equal(t, true, b.IsVerified("radio-t", "user1"))
+
+	assert.Equal(t, true, b.IsBlocked("radio-t", "user2"))
+	assert.Equal(t, false, b.IsVerified("radio-t", "user2"))
+}
+
+func TestNative_ImportWithMapper(t *testing.T) {
+	b, teardown := prep(t) // write 2 comments
+	defer teardown()
+
+	// want to remap comments to https://rdt.c
+	rules := `https://radio-t.com* https://rdt.c*`
+	mapper, err := NewURLMapper(strings.NewReader(rules))
+	assert.NoError(t, err)
+
+	inp := `{"version":1,"users":[{"id":"user1","blocked":{"status":false,"until":"0001-01-01T00:00:00Z"},"verified":true},{"id":"user2","blocked":{"status":true,"until":"2018-12-23T02:55:22.472041-06:00"},"verified":false}],"posts":[{"url":"https://radio-t.com","read_only":true}]}
+	{"id":"efbc17f177ee1a1c0ee6e1e025749966ec071adc","pid":"","text":"some text, <a href=\"http://radio-t.com\" rel=\"nofollow\">link</a>","user":{"name":"user name","id":"user1","picture":"","ip":"293ec5b0cf154855258824ec7fac5dc63d176915","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com"},"score":0,"votes":{},"time":"2017-12-20T15:18:22-06:00"}
+	{"id":"f863bd79-fec6-4a75-b308-61fe5dd02aa1","pid":"1234","text":"some text2","user":{"name":"user name","id":"user2","picture":"","ip":"293ec5b0cf154855258824ec7fac5dc63d176915","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com/2"},"score":0,"votes":{},"time":"2017-12-20T15:18:23-06:00"}`
+	mappedReader := WithMapper(strings.NewReader(inp), mapper)
+
+	b.AdminStore = admin.NewStaticStore("12345", nil, []string{}, "")
+	r := Native{DataStore: b}
+	size, err := r.Import(mappedReader, "radio-t")
+	assert.NoError(t, err)
+	assert.Equal(t, 2, size)
+
+	comments, err := b.Last("radio-t", 10, time.Time{}, store.User{})
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(comments))
+	assert.Equal(t, "f863bd79-fec6-4a75-b308-61fe5dd02aa1", comments[0].ID)
+	assert.Equal(t, "1234", comments[0].ParentID)
+	assert.Equal(t, false, b.IsReadOnly(comments[0].Locator))
+	assert.Equal(t, "https://rdt.c/2", comments[0].Locator.URL)
+
+	assert.Equal(t, "efbc17f177ee1a1c0ee6e1e025749966ec071adc", comments[1].ID)
+	assert.Equal(t, true, b.IsReadOnly(comments[1].Locator))
+	assert.Equal(t, "https://rdt.c", comments[1].Locator.URL)
 
 	assert.Equal(t, false, b.IsBlocked("radio-t", "user1"))
 	assert.Equal(t, true, b.IsVerified("radio-t", "user1"))
@@ -101,48 +141,53 @@ func TestNative_Import(t *testing.T) {
 }
 
 func TestNative_ImportWrongVersion(t *testing.T) {
+	b, teardown := prep(t) // write 2 comments
+	defer teardown()
+
 	inp := `{"version":2,"users":[{"id":"user1","blocked":{"status":false,"until":"0001-01-01T00:00:00Z"},"verified":true},{"id":"user2","blocked":{"status":true,"until":"2018-12-23T02:55:22.472041-06:00"},"verified":false}],"posts":[{"url":"https://radio-t.com","read_only":true}]}
 	{"id":"efbc17f177ee1a1c0ee6e1e025749966ec071adc","pid":"","text":"some text, <a href=\"http://radio-t.com\" rel=\"nofollow\">link</a>","user":{"name":"user name","id":"user1","picture":"","ip":"293ec5b0cf154855258824ec7fac5dc63d176915","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com"},"score":0,"votes":{},"time":"2017-12-20T15:18:22-06:00"}
 	{"id":"f863bd79-fec6-4a75-b308-61fe5dd02aa1","pid":"1234","text":"some text2","user":{"name":"user name","id":"user2","picture":"","ip":"293ec5b0cf154855258824ec7fac5dc63d176915","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com/2"},"score":0,"votes":{},"time":"2017-12-20T15:18:23-06:00"}`
 
-	b := prep(t) // write some recs
-	r := Native{DataStore: &service.DataStore{Interface: b, AdminStore: admin.NewStaticStore("12345", []string{}, "")}}
+	b.AdminStore = admin.NewStaticStore("12345", nil, []string{}, "")
+	r := Native{DataStore: b}
 	size, err := r.Import(strings.NewReader(inp), "radio-t")
 	assert.EqualError(t, err, "unexpected import file version 2")
 	assert.Equal(t, 0, size)
 
 }
 func TestNative_ImportManyWithError(t *testing.T) {
-	defer os.Remove(testDb)
+	b, teardown := prep(t) // write 2 comments
+	defer teardown()
 
 	goodRec := `{"id":"%d","pid":"","text":"some text, <a href=\"http://radio-t.com\" rel=\"nofollow\">link</a>","user":{"name":"user name","id":"user1","picture":"","profile":"","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com"},"score":0,"votes":{},"time":"2017-12-20T15:18:22-06:00"}` + "\n"
 
 	buf := &bytes.Buffer{}
 	buf.WriteString(`{"version":1, "users":[], "posts":[]}` + "\n")
-	for i := 0; i < 1200; i++ {
+	for i := 0; i < 100; i++ {
 		buf.WriteString(fmt.Sprintf(goodRec, i))
 	}
 	buf.WriteString("{}\n")
 	buf.WriteString("{}\n")
 
-	b := prep(t) // write some recs
-	r := Native{DataStore: &service.DataStore{Interface: b, AdminStore: admin.NewStaticStore("12345", []string{}, "")}}
+	b.AdminStore = admin.NewStaticStore("12345", nil, []string{}, "")
+	r := Native{DataStore: b}
 	n, err := r.Import(buf, "radio-t")
 	assert.EqualError(t, err, "failed to save 2 comments")
-	assert.Equal(t, 1200, n)
-	comments, err := b.Find(store.Locator{SiteID: "radio-t", URL: "https://radio-t.com"}, "time")
-	assert.Nil(t, err)
-	assert.Equal(t, 1200, len(comments))
+	assert.Equal(t, 100, n)
+	comments, err := b.Find(store.Locator{SiteID: "radio-t", URL: "https://radio-t.com"}, "time", store.User{})
+	assert.NoError(t, err)
+	assert.Equal(t, 100, len(comments))
 }
 
 // makes new boltdb, put two records
-func prep(t *testing.T) *service.DataStore {
-	os.Remove(testDb)
+func prep(t *testing.T) (ds *service.DataStore, teardown func()) {
 
-	boltStore, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{SiteID: "radio-t", FileName: testDb})
-	assert.Nil(t, err)
+	testDB := fmt.Sprintf("/tmp/migrator-%d.db", rand.Intn(999999999))
 
-	b := &service.DataStore{Interface: boltStore, AdminStore: admin.NewStaticStore("12345", []string{}, "")}
+	boltStore, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{SiteID: "radio-t", FileName: testDB})
+	assert.NoError(t, err)
+
+	b := &service.DataStore{Engine: boltStore, AdminStore: admin.NewStaticStore("12345", nil, []string{}, "")}
 
 	comment := store.Comment{
 		ID:        "efbc17f177ee1a1c0ee6e1e025749966ec071adc",
@@ -152,7 +197,7 @@ func prep(t *testing.T) *service.DataStore {
 		User:      store.User{ID: "user1", Name: "user name"},
 	}
 	_, err = b.Create(comment)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 
 	comment = store.Comment{
 		Text: "some text2", Timestamp: time.Date(2017, 12, 20, 15, 18, 23, 0, time.Local),
@@ -160,7 +205,10 @@ func prep(t *testing.T) *service.DataStore {
 		User:    store.User{ID: "user2", Name: "user name"},
 	}
 	_, err = b.Create(comment)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 
-	return b
+	return b, func() {
+		require.NoError(t, b.Close())
+		_ = os.Remove(testDB)
+	}
 }

backend/app/migrator/testdata/commento.json

@@ -0,0 +1,69 @@
+{
+  "version": 1,
+  "comments": [
+	{
+	  "commentHex": "e7069a7dfcfaed43caf62300a9b0edb1c124ad79d0f5887c93649c15d7f69945",
+	  "domain": "example.com",
+	  "url": "https://example.com/blog/post/1",
+	  "commenterHex": "anonymous",
+	  "markdown": "Example comment created by user.",
+	  "html": "",
+	  "parentHex": "root",
+	  "score": 1,
+	  "state": "approved",
+	  "creationDate": "2021-03-12T11:21:56Z",
+	  "direction": 0,
+	  "deleted": false
+	},
+	{
+	  "commentHex": "7d77e39fcd813241d6281478cc8f21ab5f807d043c750bc1a936bc23b34fb854",
+	  "domain": "example.com",
+	  "url": "https://example.com/blog/post/1",
+	  "commenterHex": "a1ac58ed1146bd7fe3feff6a7276f73955c3bfd23cacee00e2e0a7a89b1a8c10",
+	  "markdown": "Example 2 comment created by user.",
+	  "html": "",
+	  "parentHex": "root",
+	  "score": 0,
+	  "state": "approved",
+	  "creationDate": "2021-03-17T12:09:47.722181Z",
+	  "direction": 0,
+	  "deleted": false
+	},
+	{
+	  "commentHex": "ea5f7bcd6ac9bb7b657f7d0569831104e1bcf9c253d03c1e16bf9654c49a5ce9",
+	  "domain": "example.com",
+	  "url": "https://example.com/blog/post/1",
+	  "commenterHex": "bd1290ab5c858cf2a05903c2a9a61fd63399c6635db38cc6597002195e22e061",
+	  "markdown": "Great reply!",
+	  "html": "",
+	  "parentHex": "7d77e39fcd813241d6281478cc8f21ab5f807d043c750bc1a936bc23b34fb854",
+	  "score": 0,
+	  "state": "approved",
+	  "creationDate": "2021-05-11T15:43:01.852651Z",
+	  "direction": 0,
+	  "deleted": false
+	}
+  ],
+  "commenters": [
+	{
+	  "commenterHex": "a1ac58ed1146bd7fe3feff6a7276f73955c3bfd23cacee00e2e0a7a89b1a8c10",
+	  "email": "somegreatmail@gmail.com",
+	  "name": "User5276",
+	  "link": "https://example.com/profile/257",
+	  "photo": "https://secure.gravatar.com/avatar/8f279626d26175134b0d5c88648172f7",
+	  "provider": "sso:example.com",
+	  "joinDate": "2021-03-19T19:27:25.954285Z",
+	  "isModerator": false
+	},
+	{
+	  "commenterHex": "bd1290ab5c858cf2a05903c2a9a61fd63399c6635db38cc6597002195e22e061",
+	  "email": "moregreatmail@gmail.com",
+	  "name": "Saturnin Uf",
+	  "link": "https://example.com/profile/259",
+	  "photo": "https://secure.gravatar.com/avatar/6481228d190f0286a42bee9041f9b1a1",
+	  "provider": "sso:example.com",
+	  "joinDate": "2021-03-21T12:15:37.536035Z",
+	  "isModerator": false
+	}
+  ]
+}

backend/app/migrator/testdata/disqus-deleted-post.xml

@@ -0,0 +1,150 @@
+`<?xml version="1.0" encoding="utf-8"?>
+<disqus xmlns="http://disqus.com" xmlns:dsq="http://disqus.com/disqus-internals" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://disqus.com/api/schemas/1.0/disqus.xsd http://disqus.com/api/schemas/1.0/disqus-internals.xsd">
+
+    <category dsq:id="707279">
+        <forum>radiot</forum>
+        <title>General</title>
+        <isDefault>true</isDefault>
+    </category>
+
+    <thread dsq:id="247918464">
+        <id/>
+        <forum>radiot</forum>
+        <category dsq:id="707279"/>
+        <link>http://radio-t.umputun.com/2011/03/229_8880.html</link>
+        <title>Радио-Т: Радио-Т 229</title>
+        <message/>
+        <createdAt>2011-03-07T20:46:25Z</createdAt>
+        <author>
+            <email>umputun@gmail.com</email>
+            <name>Umputun</name>
+            <isAnonymous>false</isAnonymous>
+            <username>umputun</username>
+        </author>
+        <ipAddress>98.212.28.115</ipAddress>
+        <isClosed>false</isClosed>
+        <isDeleted>false</isDeleted>
+    </thread>
+
+    <thread dsq:id="247937687">
+        <id>http://www.radio-t.com/p/2011/03/05/podcast-229/</id>
+        <forum>radiot</forum>
+        <category dsq:id="707279"/>
+        <link>https://radio-t.com/p/2011/03/05/podcast-229/</link>
+        <title>Радио-Т: Радио-Т 229</title>
+        <message/>
+        <createdAt>2011-03-07T21:17:17Z</createdAt>
+        <author>
+            <email>umputun@gmail.com</email>
+            <name>Umputun</name>
+            <isAnonymous>false</isAnonymous>
+            <username>umputun</username>
+        </author>
+        <ipAddress>80.250.214.235</ipAddress>
+        <isClosed>true</isClosed>
+        <isDeleted>false</isDeleted>
+    </thread>
+
+
+    <post dsq:id="299619020">
+        <id>3565798471341011339</id>
+        <message>
+            <![CDATA[<p>The quick brown fox jumps over the lazy dog.</p><p><a href="https://https://radio-t.com" rel="nofollow noopener" title="radio-t">some link</a></p>]]>
+        </message>
+        <createdAt>2011-08-31T15:16:29Z</createdAt>
+        <isDeleted>true</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email/>
+            <name>Alexander Blah</name>
+            <isAnonymous>false</isAnonymous>
+            <username>facebook-1787732238</username>
+        </author>
+        <ipAddress>178.178.178.178</ipAddress>
+        <thread dsq:id="247937687"/>
+    </post>
+
+    <post dsq:id="299744309">
+        <id>3029154520436241933</id>
+        <message>
+            <![CDATA[<p>Microsoft показал проводник Windows 8 с ленточным интерфейсом.</p><p><a href="http://blogs.msdn.com/b/b8/archive/2011/08/29/improvements-in-windows-explorer.aspx" rel="nofollow noopener" title="http://blogs.msdn.com/b/b8/archive/2011/08/29/improvements-in-windows-explorer.aspx">http://blogs.msdn.com/b/b8/...</a> </p>]]>
+        </message>
+        <createdAt>2011-08-31T17:44:22Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email>mihail.noname@gmail.com</email>
+            <name>mikhail</name>
+            <isAnonymous>false</isAnonymous>
+            <username>mikhail-noname</username>
+        </author>
+        <ipAddress>195.195.195.139</ipAddress>
+        <thread dsq:id="247937687"/>
+    </post>
+
+    <post dsq:id="299986072">
+        <id>6580890074280459209</id>
+        <message>
+            <![CDATA[<p>Google App Engine скоро выходит из превью статуса.</p><p>Сейчас письмо пришло от гугла.</p><p>Для платных приложений использущих High Replication Datastore (HRD) будет 99.95% uptime SLA.<br>Будут Премьер аккаунты за 500 баксов/месяц с оперативной поддержкой и любым количеством приложений на аккаунте (+ плата за потребленные ресурсы).<br>В связи с переходом на новую систему оплаты, обещают снизить бесплатные квоты.<br>Всем кто включит биллинг до 31 октября, обещают 50 баксов :)</p>]]>
+        </message>
+        <createdAt>2011-08-31T22:48:43Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email>john.nousername@gmail.com</email>
+            <name>No Username</name>
+            <isAnonymous>false</isAnonymous>
+        </author>
+        <ipAddress>89.89.89.139</ipAddress>
+        <thread dsq:id="247918464"/>
+    </post>
+
+    <post>
+        <id>12345678890</id>
+        <message>This comment had no ID</message>
+        <createdAt>2011-08-31T22:49:43Z</createdAt>
+        <forum>radiot</forum>
+        <isDeleted>false</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email>blah.noname@gmail.com</email>
+            <name>Blah Noname</name>
+            <isAnonymous>false</isAnonymous>
+            <username>74b9e7568ef6860e93862c5d77590123</username>
+        </author>
+        <ipAddress>189.89.89.139</ipAddress>
+        <thread dsq:id="247918464"/>
+    </post>
+
+    <post dsq:id="299986073">
+        <id>6580890074280459219</id>
+        <message>some ugly spam</message>
+        <createdAt>2011-09-30T22:48:43Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>true</isSpam>
+        <author>
+            <email>spam.noname@gmail.com</email>
+            <name>Spam Noname</name>
+            <isAnonymous>false</isAnonymous>
+            <username>google-2c5d77590123</username>
+        </author>
+        <ipAddress>189.89.89.139</ipAddress>
+        <thread dsq:id="247937687"/>
+    </post>
+
+    <post dsq:id="x299986073">
+        <message>some bad comment</message>
+        <createdAt>2011-x09-30T22:48:43Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>123</isSpam>
+        <author>
+            <email>noname@gmail.com</email>
+            <name>Noname</name>
+            <isAnonymous>true</isAnonymous>
+            <username>google-2c5d77590123</username>
+        </author>
+        <ipAddress>189.89.89.39</ipAddress>
+        <thread dsq:id=247937687/>
+    </post>
+
+</disqus>

backend/app/migrator/testdata/disqus-deleted-thread.xml

@@ -0,0 +1,150 @@
+`<?xml version="1.0" encoding="utf-8"?>
+<disqus xmlns="http://disqus.com" xmlns:dsq="http://disqus.com/disqus-internals" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://disqus.com/api/schemas/1.0/disqus.xsd http://disqus.com/api/schemas/1.0/disqus-internals.xsd">
+
+    <category dsq:id="707279">
+        <forum>radiot</forum>
+        <title>General</title>
+        <isDefault>true</isDefault>
+    </category>
+
+    <thread dsq:id="247918464">
+        <id/>
+        <forum>radiot</forum>
+        <category dsq:id="707279"/>
+        <link>http://radio-t.umputun.com/2011/03/229_8880.html</link>
+        <title>Радио-Т: Радио-Т 229</title>
+        <message/>
+        <createdAt>2011-03-07T20:46:25Z</createdAt>
+        <author>
+            <email>umputun@gmail.com</email>
+            <name>Umputun</name>
+            <isAnonymous>false</isAnonymous>
+            <username>umputun</username>
+        </author>
+        <ipAddress>98.212.28.115</ipAddress>
+        <isClosed>false</isClosed>
+        <isDeleted>false</isDeleted>
+    </thread>
+
+    <thread dsq:id="247937687">
+        <id>http://www.radio-t.com/p/2011/03/05/podcast-229/</id>
+        <forum>radiot</forum>
+        <category dsq:id="707279"/>
+        <link>https://radio-t.com/p/2011/03/05/podcast-229/</link>
+        <title>Радио-Т: Радио-Т 229</title>
+        <message/>
+        <createdAt>2011-03-07T21:17:17Z</createdAt>
+        <author>
+            <email>umputun@gmail.com</email>
+            <name>Umputun</name>
+            <isAnonymous>false</isAnonymous>
+            <username>umputun</username>
+        </author>
+        <ipAddress>80.250.214.235</ipAddress>
+        <isClosed>true</isClosed>
+        <isDeleted>true</isDeleted>
+    </thread>
+
+
+    <post dsq:id="299619020">
+        <id>3565798471341011339</id>
+        <message>
+            <![CDATA[<p>The quick brown fox jumps over the lazy dog.</p><p><a href="https://https://radio-t.com" rel="nofollow noopener" title="radio-t">some link</a></p>]]>
+        </message>
+        <createdAt>2011-08-31T15:16:29Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email/>
+            <name>Alexander Blah</name>
+            <isAnonymous>false</isAnonymous>
+            <username>facebook-1787732238</username>
+        </author>
+        <ipAddress>178.178.178.178</ipAddress>
+        <thread dsq:id="247937687"/>
+    </post>
+
+    <post dsq:id="299744309">
+        <id>3029154520436241933</id>
+        <message>
+            <![CDATA[<p>Microsoft показал проводник Windows 8 с ленточным интерфейсом.</p><p><a href="http://blogs.msdn.com/b/b8/archive/2011/08/29/improvements-in-windows-explorer.aspx" rel="nofollow noopener" title="http://blogs.msdn.com/b/b8/archive/2011/08/29/improvements-in-windows-explorer.aspx">http://blogs.msdn.com/b/b8/...</a> </p>]]>
+        </message>
+        <createdAt>2011-08-31T17:44:22Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email>mihail.noname@gmail.com</email>
+            <name>mikhail</name>
+            <isAnonymous>false</isAnonymous>
+            <username>mikhail-noname</username>
+        </author>
+        <ipAddress>195.195.195.139</ipAddress>
+        <thread dsq:id="247937687"/>
+    </post>
+
+    <post dsq:id="299986072">
+        <id>6580890074280459209</id>
+        <message>
+            <![CDATA[<p>Google App Engine скоро выходит из превью статуса.</p><p>Сейчас письмо пришло от гугла.</p><p>Для платных приложений использущих High Replication Datastore (HRD) будет 99.95% uptime SLA.<br>Будут Премьер аккаунты за 500 баксов/месяц с оперативной поддержкой и любым количеством приложений на аккаунте (+ плата за потребленные ресурсы).<br>В связи с переходом на новую систему оплаты, обещают снизить бесплатные квоты.<br>Всем кто включит биллинг до 31 октября, обещают 50 баксов :)</p>]]>
+        </message>
+        <createdAt>2011-08-31T22:48:43Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email>john.nousername@gmail.com</email>
+            <name>No Username</name>
+            <isAnonymous>false</isAnonymous>
+        </author>
+        <ipAddress>89.89.89.139</ipAddress>
+        <thread dsq:id="247918464"/>
+    </post>
+
+    <post>
+        <id>12345678890</id>
+        <message>This comment had no ID</message>
+        <createdAt>2011-08-31T22:49:43Z</createdAt>
+        <forum>radiot</forum>
+        <isDeleted>false</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email>blah.noname@gmail.com</email>
+            <name>Blah Noname</name>
+            <isAnonymous>false</isAnonymous>
+            <username>74b9e7568ef6860e93862c5d77590123</username>
+        </author>
+        <ipAddress>189.89.89.139</ipAddress>
+        <thread dsq:id="247918464"/>
+    </post>
+
+    <post dsq:id="299986073">
+        <id>6580890074280459219</id>
+        <message>some ugly spam</message>
+        <createdAt>2011-09-30T22:48:43Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>true</isSpam>
+        <author>
+            <email>spam.noname@gmail.com</email>
+            <name>Spam Noname</name>
+            <isAnonymous>false</isAnonymous>
+            <username>google-2c5d77590123</username>
+        </author>
+        <ipAddress>189.89.89.139</ipAddress>
+        <thread dsq:id="247937687"/>
+    </post>
+
+    <post dsq:id="x299986073">
+        <message>some bad comment</message>
+        <createdAt>2011-x09-30T22:48:43Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>123</isSpam>
+        <author>
+            <email>noname@gmail.com</email>
+            <name>Noname</name>
+            <isAnonymous>true</isAnonymous>
+            <username>google-2c5d77590123</username>
+        </author>
+        <ipAddress>189.89.89.39</ipAddress>
+        <thread dsq:id=247937687/>
+    </post>
+
+</disqus>

backend/app/migrator/testdata/disqus.xml

@@ -0,0 +1,150 @@
+`<?xml version="1.0" encoding="utf-8"?>
+<disqus xmlns="http://disqus.com" xmlns:dsq="http://disqus.com/disqus-internals" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://disqus.com/api/schemas/1.0/disqus.xsd http://disqus.com/api/schemas/1.0/disqus-internals.xsd">
+
+    <category dsq:id="707279">
+        <forum>radiot</forum>
+        <title>General</title>
+        <isDefault>true</isDefault>
+    </category>
+
+    <thread dsq:id="247918464">
+        <id/>
+        <forum>radiot</forum>
+        <category dsq:id="707279"/>
+        <link>http://radio-t.umputun.com/2011/03/229_8880.html</link>
+        <title>Радио-Т: Радио-Т 229</title>
+        <message/>
+        <createdAt>2011-03-07T20:46:25Z</createdAt>
+        <author>
+            <email>umputun@gmail.com</email>
+            <name>Umputun</name>
+            <isAnonymous>false</isAnonymous>
+            <username>umputun</username>
+        </author>
+        <ipAddress>98.212.28.115</ipAddress>
+        <isClosed>false</isClosed>
+        <isDeleted>false</isDeleted>
+    </thread>
+
+    <thread dsq:id="247937687">
+        <id>http://www.radio-t.com/p/2011/03/05/podcast-229/</id>
+        <forum>radiot</forum>
+        <category dsq:id="707279"/>
+        <link>https://radio-t.com/p/2011/03/05/podcast-229/</link>
+        <title>Радио-Т: Радио-Т 229</title>
+        <message/>
+        <createdAt>2011-03-07T21:17:17Z</createdAt>
+        <author>
+            <email>umputun@gmail.com</email>
+            <name>Umputun</name>
+            <isAnonymous>false</isAnonymous>
+            <username>umputun</username>
+        </author>
+        <ipAddress>80.250.214.235</ipAddress>
+        <isClosed>true</isClosed>
+        <isDeleted>false</isDeleted>
+    </thread>
+
+
+    <post dsq:id="299619020">
+        <id>3565798471341011339</id>
+        <message>
+            <![CDATA[<p>The quick brown fox jumps over the lazy dog.</p><p><a href="https://https://radio-t.com" rel="nofollow noopener" title="radio-t">some link</a></p>]]>
+        </message>
+        <createdAt>2011-08-31T15:16:29Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email/>
+            <name>Alexander Blah</name>
+            <isAnonymous>false</isAnonymous>
+            <username>facebook-1787732238</username>
+        </author>
+        <ipAddress>178.178.178.178</ipAddress>
+        <thread dsq:id="247937687"/>
+    </post>
+
+    <post dsq:id="299744309">
+        <id>3029154520436241933</id>
+        <message>
+            <![CDATA[<p>Microsoft показал проводник Windows 8 с ленточным интерфейсом.</p><p><a href="http://blogs.msdn.com/b/b8/archive/2011/08/29/improvements-in-windows-explorer.aspx" rel="nofollow noopener" title="http://blogs.msdn.com/b/b8/archive/2011/08/29/improvements-in-windows-explorer.aspx">http://blogs.msdn.com/b/b8/...</a> </p>]]>
+        </message>
+        <createdAt>2011-08-31T17:44:22Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email>mihail.noname@gmail.com</email>
+            <name>mikhail</name>
+            <isAnonymous>false</isAnonymous>
+            <username>mikhail-noname</username>
+        </author>
+        <ipAddress>195.195.195.139</ipAddress>
+        <thread dsq:id="247937687"/>
+    </post>
+
+    <post dsq:id="299986072">
+        <id>6580890074280459209</id>
+        <message>
+            <![CDATA[<p>Google App Engine скоро выходит из превью статуса.</p><p>Сейчас письмо пришло от гугла.</p><p>Для платных приложений использущих High Replication Datastore (HRD) будет 99.95% uptime SLA.<br>Будут Премьер аккаунты за 500 баксов/месяц с оперативной поддержкой и любым количеством приложений на аккаунте (+ плата за потребленные ресурсы).<br>В связи с переходом на новую систему оплаты, обещают снизить бесплатные квоты.<br>Всем кто включит биллинг до 31 октября, обещают 50 баксов :)</p>]]>
+        </message>
+        <createdAt>2011-08-31T22:48:43Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email>john.nousername@gmail.com</email>
+            <name>No Username</name>
+            <isAnonymous>false</isAnonymous>
+        </author>
+        <ipAddress>89.89.89.139</ipAddress>
+        <thread dsq:id="247918464"/>
+    </post>
+
+    <post>
+        <id>12345678890</id>
+        <message>This comment had no ID</message>
+        <createdAt>2011-08-31T22:49:43Z</createdAt>
+        <forum>radiot</forum>
+        <isDeleted>false</isDeleted>
+        <isSpam>false</isSpam>
+        <author>
+            <email>blah.noname@gmail.com</email>
+            <name>Blah Noname</name>
+            <isAnonymous>false</isAnonymous>
+            <username>74b9e7568ef6860e93862c5d77590123</username>
+        </author>
+        <ipAddress>189.89.89.139</ipAddress>
+        <thread dsq:id="247918464"/>
+    </post>
+
+    <post dsq:id="299986073">
+        <id>6580890074280459219</id>
+        <message>some ugly spam</message>
+        <createdAt>2011-09-30T22:48:43Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>true</isSpam>
+        <author>
+            <email>spam.noname@gmail.com</email>
+            <name>Spam Noname</name>
+            <isAnonymous>false</isAnonymous>
+            <username>google-2c5d77590123</username>
+        </author>
+        <ipAddress>189.89.89.139</ipAddress>
+        <thread dsq:id="247937687"/>
+    </post>
+
+    <post dsq:id="x299986073">
+        <message>some bad comment</message>
+        <createdAt>2011-x09-30T22:48:43Z</createdAt>
+        <isDeleted>false</isDeleted>
+        <isSpam>123</isSpam>
+        <author>
+            <email>noname@gmail.com</email>
+            <name>Noname</name>
+            <isAnonymous>true</isAnonymous>
+            <username>google-2c5d77590123</username>
+        </author>
+        <ipAddress>189.89.89.39</ipAddress>
+        <thread dsq:id=247937687/>
+    </post>
+
+</disqus>

backend/app/migrator/wordpress.go

@@ -9,7 +9,7 @@ import (
 	log "github.com/go-pkgz/lgr"
 	"github.com/pkg/errors"
 
-	"github.com/umputun/remark/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store"
 )
 
 const wpTimeLayout = "2006-01-02 15:04:05"
@@ -61,8 +61,8 @@ func (w *WordPress) Convert(text string) string {
 // Import comments from WP and save to store
 func (w *WordPress) Import(r io.Reader, siteID string) (size int, err error) {
 
-	if err = w.DataStore.DeleteAll(siteID); err != nil {
-		return 0, err
+	if e := w.DataStore.DeleteAll(siteID); e != nil {
+		return 0, e
 	}
 
 	commentsCh := w.convert(r, siteID)
@@ -107,8 +107,7 @@ func (w *WordPress) convert(r io.Reader, siteID string) chan store.Comment {
 				break
 			}
 
-			switch el := t.(type) {
-			case xml.StartElement:
+			if el, ok := t.(xml.StartElement); ok {
 				if el.Name.Local == "item" {
 					stats.inpItems++
 					item := wpItem{}
@@ -139,6 +138,7 @@ func (w *WordPress) convert(r io.Reader, siteID string) chan store.Comment {
 								Text:      comment.Content,
 								Timestamp: comment.Date.time,
 								ParentID:  comment.PID,
+								Imported:  true,
 							}
 							commentsCh <- commentFormatter.Format(c)
 							stats.inpComments++

backend/app/migrator/wordpress_test.go

@@ -6,30 +6,32 @@ import (
 	"testing"
 	"time"
 
-	bolt "github.com/coreos/bbolt"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	bolt "go.etcd.io/bbolt"
 
-	"github.com/umputun/remark/backend/app/store"
-	"github.com/umputun/remark/backend/app/store/admin"
-	"github.com/umputun/remark/backend/app/store/engine"
-	"github.com/umputun/remark/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/admin"
+	"github.com/umputun/remark42/backend/app/store/engine"
+	"github.com/umputun/remark42/backend/app/store/service"
 )
 
 func TestWordPress_Import(t *testing.T) {
 	siteID := "testWP"
 	defer func() { _ = os.Remove("/tmp/remark-test.db") }()
 	b, err := engine.NewBoltDB(bolt.Options{}, engine.BoltSite{FileName: "/tmp/remark-test.db", SiteID: siteID})
-	assert.Nil(t, err, "create store")
+	assert.NoError(t, err, "create store")
 
-	dataStore := service.DataStore{Interface: b, AdminStore: admin.NewStaticStore("12345", []string{}, "")}
+	dataStore := service.DataStore{Engine: b, AdminStore: admin.NewStaticStore("12345", nil, []string{}, "")}
+	defer dataStore.Close()
 	wp := WordPress{DataStore: &dataStore}
 	size, err := wp.Import(strings.NewReader(xmlTestWP), siteID)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 3, size)
 
-	last, err := dataStore.Last(siteID, 10)
-	assert.Nil(t, err)
-	assert.Equal(t, 3, len(last), "3 comments imported")
+	last, err := dataStore.Last(siteID, 10, time.Time{}, adminUser)
+	assert.NoError(t, err)
+	require.Equal(t, 3, len(last), "3 comments imported")
 
 	c := last[0]
 	assert.Equal(t, "14", c.ID)
@@ -40,16 +42,17 @@ func TestWordPress_Import(t *testing.T) {
 	ts, _ := time.Parse(wpTimeLayout, "2010-08-18 15:19:14")
 	assert.Equal(t, ts, c.Timestamp)
 	assert.Equal(t, c.Text, "<p>Mekkatorque was over in that tent up to the right</p>\n")
+	assert.True(t, c.Imported)
 
 	posts, err := dataStore.List(siteID, 0, 0)
-	assert.Nil(t, err)
-	assert.Equal(t, 1, len(posts))
+	assert.NoError(t, err)
+	require.Equal(t, 1, len(posts))
 
 	p := posts[0]
 	assert.Equal(t, "https://realmenweardress.es/2010/07/do-you-rp/", p.URL)
 
 	count, err := dataStore.Count(store.Locator{URL: "https://realmenweardress.es/2010/07/do-you-rp/", SiteID: siteID})
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 3, count)
 }
 
@@ -61,7 +64,7 @@ func TestWordPress_Convert(t *testing.T) {
 	for c := range ch {
 		comments = append(comments, c)
 	}
-	assert.Equal(t, 3, len(comments), "3 comments exported, 1 excluded")
+	require.Equal(t, 3, len(comments), "3 comments exported, 1 excluded")
 
 	exp1 := store.Comment{
 		ID: "13",
@@ -75,6 +78,7 @@ func TestWordPress_Convert(t *testing.T) {
 			ID:   "wordpress_" + store.EncodeID("Wednesday Reading &laquo; Cynwise&#039;s Battlefield Manual"),
 			IP:   "74.200.244.101",
 		},
+		Imported: true,
 	}
 	exp1.Timestamp, _ = time.Parse(wpTimeLayout, "2010-07-21 14:02:08")
 	assert.Equal(t, exp1, comments[1])
@@ -88,7 +92,7 @@ func TestWP_Convert_MD(t *testing.T) {
 	for c := range ch {
 		comments = append(comments, c)
 	}
-	assert.Equal(t, 3, len(comments), "3 comments exported")
+	require.Equal(t, 3, len(comments), "3 comments exported")
 
 	assert.Equal(t, "<p>Row1<br/>\nRow2</p>\n\n<p>Row4</p>\n", comments[0].Text)
 
@@ -188,7 +192,7 @@ var xmlTestWP = `
 		<category domain="post_tag" nicename="alts"><![CDATA[alts]]></category>
 		<category domain="post_tag" nicename="role-playing"><![CDATA[role playing]]></category>
 		<category domain="category" nicename="stuff"><![CDATA[Stuff]]></category>
-		<category domain="post_tag" nicename="wierd-in-a-cant-quite-help-myself-way"><![CDATA[wierd in a can't quite help myself way]]></category>
+		<category domain="post_tag" nicename="weird-in-a-cant-quite-help-myself-way"><![CDATA[weird in a can't quite help myself way]]></category>
 		<wp:postmeta>
 			<wp:meta_key><![CDATA[_edit_last]]></wp:meta_key>
 			<wp:meta_value><![CDATA[2]]></wp:meta_value>

backend/app/notify/email.go

@@ -0,0 +1,431 @@
+package notify
+
+import (
+	"bytes"
+	"context"
+	"crypto/tls"
+	"fmt"
+	"io"
+	"mime"
+	"mime/quotedprintable"
+	"net"
+	"net/smtp"
+	"text/template"
+	"time"
+
+	log "github.com/go-pkgz/lgr"
+	"github.com/go-pkgz/repeater"
+	"github.com/hashicorp/go-multierror"
+	"github.com/pkg/errors"
+
+	"github.com/umputun/remark42/backend/app/templates"
+)
+
+// EmailParams contain settings for email notifications
+type EmailParams struct {
+	From                     string   // from email address
+	AdminEmails              []string // administrator emails to send copy of comment notification to
+	MsgTemplatePath          string   // path to request message template
+	VerificationSubject      string   // verification message sub
+	VerificationTemplatePath string   // path to verification template
+	SubscribeURL             string   // full subscribe handler URL
+	UnsubscribeURL           string   // full unsubscribe handler URL
+
+	TokenGenFn func(userID, email, site string) (string, error) // Unsubscribe token generation function
+}
+
+// SMTPParams contain settings for smtp server connection
+type SMTPParams struct {
+	Host     string        // SMTP host
+	Port     int           // SMTP port
+	TLS      bool          // TLS auth
+	Username string        // user name
+	Password string        // password
+	TimeOut  time.Duration // TCP connection timeout
+}
+
+// Email implements notify.Destination for email
+type Email struct {
+	EmailParams
+	SMTPParams
+
+	smtp       smtpClientCreator
+	msgTmpl    *template.Template // parsed request message template
+	verifyTmpl *template.Template // parsed verification message template
+}
+
+// default email client implementation
+type emailClient struct{ smtpClientCreator }
+
+// smtpClient interface defines subset of net/smtp used by email client
+type smtpClient interface {
+	Mail(string) error
+	Auth(smtp.Auth) error
+	Rcpt(string) error
+	Data() (io.WriteCloser, error)
+	Quit() error
+	Close() error
+}
+
+// smtpClientCreator interface defines function for creating new smtpClients
+type smtpClientCreator interface {
+	Create(SMTPParams) (smtpClient, error)
+}
+
+type emailMessage struct {
+	from    string
+	to      string
+	message string
+}
+
+// msgTmplData store data for message from request template execution
+type msgTmplData struct {
+	UserName          string
+	UserPicture       string
+	CommentText       string
+	CommentLink       string
+	CommentDate       time.Time
+	ParentUserName    string
+	ParentUserPicture string
+	ParentCommentText string
+	ParentCommentLink string
+	ParentCommentDate time.Time
+	PostTitle         string
+	Email             string
+	UnsubscribeLink   string
+	ForAdmin          bool
+}
+
+// verifyTmplData store data for verification message template execution
+type verifyTmplData struct {
+	User         string
+	Token        string
+	Email        string
+	Site         string
+	SubscribeURL string
+}
+
+const (
+	defaultVerificationSubject           = "Email verification"
+	defaultEmailTimeout                  = 10 * time.Second
+	defaultEmailTemplatePath             = "email_reply.html.tmpl"
+	defaultEmailVerificationTemplatePath = "email_confirmation_subscription.html.tmpl"
+)
+
+// NewEmail makes new Email object, returns error in case of e.MsgTemplate or e.VerificationTemplate parsing error
+func NewEmail(emailParams EmailParams, smtpParams SMTPParams) (*Email, error) {
+	// set up Email emailParams
+	res := Email{EmailParams: emailParams}
+	res.smtp = &emailClient{}
+	res.SMTPParams = smtpParams
+	if res.TimeOut <= 0 {
+		res.TimeOut = defaultEmailTimeout
+	}
+
+	if res.VerificationSubject == "" {
+		res.VerificationSubject = defaultVerificationSubject
+	}
+
+	// initialize templates
+	err := res.setTemplates()
+	if err != nil {
+		return nil, errors.Wrap(err, "can't set templates")
+	}
+
+	log.Printf("[DEBUG] Create new email notifier for server %s with user %s, timeout=%s",
+		res.Host, res.Username, res.TimeOut)
+
+	return &res, nil
+}
+
+func (e *Email) setTemplates() error {
+	var err error
+	var msgTmplFile, verifyTmplFile []byte
+	fs := templates.NewFS()
+
+	if e.VerificationTemplatePath == "" {
+		e.VerificationTemplatePath = defaultEmailVerificationTemplatePath
+	}
+
+	if e.MsgTemplatePath == "" {
+		e.MsgTemplatePath = defaultEmailTemplatePath
+	}
+
+	if msgTmplFile, err = fs.ReadFile(e.MsgTemplatePath); err != nil {
+		return errors.Wrapf(err, "can't read message template")
+	}
+	if verifyTmplFile, err = fs.ReadFile(e.VerificationTemplatePath); err != nil {
+		return errors.Wrapf(err, "can't read verification template")
+	}
+	if e.msgTmpl, err = template.New("msgTmpl").Parse(string(msgTmplFile)); err != nil {
+		return errors.Wrapf(err, "can't parse message template")
+	}
+	if e.verifyTmpl, err = template.New("verifyTmpl").Parse(string(verifyTmplFile)); err != nil {
+		return errors.Wrapf(err, "can't parse verification template")
+	}
+
+	return nil
+}
+
+// Send email about comment reply to Request.Emails and Email.AdminEmails
+// if they're set.
+// Thread safe
+func (e *Email) Send(ctx context.Context, req Request) error {
+	select {
+	case <-ctx.Done():
+		return errors.Errorf("sending email messages about comment %q aborted due to canceled context", req.Comment.ID)
+	default:
+	}
+
+	result := new(multierror.Error)
+
+	for _, email := range req.Emails {
+		err := e.buildAndSendMessage(ctx, req, email, false)
+		result = multierror.Append(errors.Wrapf(err, "problem sending user email notification to %q", email))
+	}
+
+	for _, email := range e.AdminEmails {
+		err := e.buildAndSendMessage(ctx, req, email, true)
+		result = multierror.Append(errors.Wrapf(err, "problem sending admin email notification to %q", email))
+	}
+
+	return result.ErrorOrNil()
+}
+
+func (e *Email) buildAndSendMessage(ctx context.Context, req Request, email string, forAdmin bool) error {
+	log.Printf("[DEBUG] send notification via %s, comment id %s", e, req.Comment.ID)
+	msg, err := e.buildMessageFromRequest(req, email, forAdmin)
+	if err != nil {
+		return err
+	}
+
+	return repeater.NewDefault(5, time.Millisecond*250).Do(
+		ctx,
+		func() error {
+			return e.sendMessage(emailMessage{from: e.From, to: email, message: msg})
+		})
+}
+
+// SendVerification email verification VerificationRequest.Email if it's set.
+// Thread safe
+func (e *Email) SendVerification(ctx context.Context, req VerificationRequest) error {
+	if req.Email == "" {
+		// this means we can't send this request via Email
+		return nil
+	}
+	select {
+	case <-ctx.Done():
+		return errors.Errorf("sending message to %q aborted due to canceled context", req.User)
+	default:
+	}
+
+	log.Printf("[DEBUG] send verification via %s, user %s", e, req.User)
+	msg, err := e.buildVerificationMessage(req.User, req.Email, req.Token, req.SiteID)
+	if err != nil {
+		return err
+	}
+
+	return repeater.NewDefault(5, time.Millisecond*250).Do(
+		ctx,
+		func() error {
+			return e.sendMessage(emailMessage{from: e.From, to: req.Email, message: msg})
+		})
+}
+
+// buildVerificationMessage generates verification email message based on given input
+func (e *Email) buildVerificationMessage(user, email, token, site string) (string, error) {
+	subject := e.VerificationSubject
+	msg := bytes.Buffer{}
+	err := e.verifyTmpl.Execute(&msg, verifyTmplData{
+		User:         user,
+		Token:        token,
+		Email:        email,
+		Site:         site,
+		SubscribeURL: e.SubscribeURL,
+	})
+	if err != nil {
+		return "", errors.Wrapf(err, "error executing template to build verification message")
+	}
+	return e.buildMessage(subject, msg.String(), email, "text/html", "")
+}
+
+// buildMessageFromRequest generates email message based on Request using e.MsgTemplate
+func (e *Email) buildMessageFromRequest(req Request, email string, forAdmin bool) (string, error) {
+	subject := "New reply to your comment"
+	if forAdmin {
+		subject = "New comment to your site"
+	}
+	if req.Comment.PostTitle != "" {
+		subject += fmt.Sprintf(" for %q", req.Comment.PostTitle)
+	}
+
+	token, err := e.TokenGenFn(req.parent.User.ID, email, req.Comment.Locator.SiteID)
+	if err != nil {
+		return "", errors.Wrapf(err, "error creating token for unsubscribe link")
+	}
+	unsubscribeLink := e.UnsubscribeURL + "?site=" + req.Comment.Locator.SiteID + "&tkn=" + token
+	if forAdmin {
+		unsubscribeLink = ""
+	}
+
+	commentURLPrefix := req.Comment.Locator.URL + uiNav
+	msg := bytes.Buffer{}
+	tmplData := msgTmplData{
+		UserName:        req.Comment.User.Name,
+		UserPicture:     req.Comment.User.Picture,
+		CommentText:     req.Comment.Text,
+		CommentLink:     commentURLPrefix + req.Comment.ID,
+		CommentDate:     req.Comment.Timestamp,
+		PostTitle:       req.Comment.PostTitle,
+		Email:           email,
+		UnsubscribeLink: unsubscribeLink,
+		ForAdmin:        forAdmin,
+	}
+	// in case of message to admin, parent message might be empty
+	if req.Comment.ParentID != "" {
+		tmplData.ParentUserName = req.parent.User.Name
+		tmplData.ParentUserPicture = req.parent.User.Picture
+		tmplData.ParentCommentText = req.parent.Text
+		tmplData.ParentCommentLink = commentURLPrefix + req.parent.ID
+		tmplData.ParentCommentDate = req.parent.Timestamp
+	}
+	err = e.msgTmpl.Execute(&msg, tmplData)
+	if err != nil {
+		return "", errors.Wrapf(err, "error executing template to build comment reply message")
+	}
+	return e.buildMessage(subject, msg.String(), email, "text/html", unsubscribeLink)
+}
+
+// buildMessage generates email message to send using net/smtp.Data()
+func (e *Email) buildMessage(subject, body, to, contentType, unsubscribeLink string) (message string, err error) {
+	addHeader := func(msg, h, v string) string {
+		msg += fmt.Sprintf("%s: %s\n", h, v)
+		return msg
+	}
+	message = addHeader(message, "From", e.From)
+	message = addHeader(message, "To", to)
+	message = addHeader(message, "Subject", mime.BEncoding.Encode("utf-8", subject))
+	message = addHeader(message, "Content-Transfer-Encoding", "quoted-printable")
+
+	if contentType != "" {
+		message = addHeader(message, "MIME-version", "1.0")
+		message = addHeader(message, "Content-Type", contentType+`; charset="UTF-8"`)
+	}
+
+	if unsubscribeLink != "" {
+		// https://support.google.com/mail/answer/81126 -> "Include option to unsubscribe"
+		message = addHeader(message, "List-Unsubscribe-Post", "List-Unsubscribe=One-Click")
+		message = addHeader(message, "List-Unsubscribe", "<"+unsubscribeLink+">")
+	}
+
+	message = addHeader(message, "Date", time.Now().Format(time.RFC1123Z))
+
+	buff := &bytes.Buffer{}
+	qp := quotedprintable.NewWriter(buff)
+	if _, err := qp.Write([]byte(body)); err != nil {
+		return "", err
+	}
+	// flush now, must NOT use defer, for small body, defer may cause buff.String() got empty body
+	if err := qp.Close(); err != nil {
+		return "", fmt.Errorf("quotedprintable Write failed: %w", err)
+	}
+	m := buff.String()
+	message += "\n" + m
+	return message, nil
+}
+
+// sendMessage sends messages to server in a new connection, closing the connection after finishing.
+// Thread safe.
+func (e *Email) sendMessage(m emailMessage) error {
+	if e.smtp == nil {
+		return errors.New("sendMessage called without client set")
+	}
+	client, err := e.smtp.Create(e.SMTPParams)
+	if err != nil {
+		return errors.Wrap(err, "failed to make smtp Create")
+	}
+
+	defer func() {
+		if err = client.Quit(); err != nil {
+			log.Printf("[WARN] failed to send quit command to %s:%d, %v", e.Host, e.Port, err)
+			if err = client.Close(); err != nil {
+				log.Printf("[WARN] can't close smtp connection, %v", err)
+			}
+		}
+	}()
+
+	if err = client.Mail(m.from); err != nil {
+		return errors.Wrapf(err, "bad from address %q", m.from)
+	}
+	if err = client.Rcpt(m.to); err != nil {
+		return errors.Wrapf(err, "bad to address %q", m.to)
+	}
+
+	writer, err := client.Data()
+	if err != nil {
+		return errors.Wrap(err, "can't make email writer")
+	}
+
+	defer func() {
+		if err = writer.Close(); err != nil {
+			log.Printf("[WARN] can't close smtp body writer, %v", err)
+		}
+	}()
+
+	buf := bytes.NewBufferString(m.message)
+	if _, err = buf.WriteTo(writer); err != nil {
+		return errors.Wrapf(err, "failed to send email body to %q", m.to)
+	}
+
+	return nil
+}
+
+// String representation of Email object
+func (e *Email) String() string {
+	return fmt.Sprintf("email: from %q with username '%s' at server %s:%d", e.From, e.Username, e.Host, e.Port)
+}
+
+// Create establish SMTP connection with server using credentials in smtpClientWithCreator.SMTPParams
+// and returns pointer to it. Thread safe.
+func (s *emailClient) Create(params SMTPParams) (smtpClient, error) {
+	authenticate := func(c *smtp.Client) error {
+		if params.Username == "" || params.Password == "" {
+			return nil
+		}
+		auth := smtp.PlainAuth("", params.Username, params.Password, params.Host)
+		if err := c.Auth(auth); err != nil {
+			return errors.Wrapf(err, "failed to auth to smtp %s:%d", params.Host, params.Port)
+		}
+		return nil
+	}
+
+	var c *smtp.Client
+	srvAddress := fmt.Sprintf("%s:%d", params.Host, params.Port)
+	if params.TLS {
+		tlsConf := &tls.Config{
+			InsecureSkipVerify: false,
+			ServerName:         params.Host,
+			MinVersion:         tls.VersionTLS12,
+		}
+		conn, err := tls.Dial("tcp", srvAddress, tlsConf)
+		if err != nil {
+			return nil, errors.Wrapf(err, "failed to dial smtp tls to %s", srvAddress)
+		}
+		if c, err = smtp.NewClient(conn, params.Host); err != nil {
+			return nil, errors.Wrapf(err, "failed to make smtp client for %s", srvAddress)
+		}
+		return c, authenticate(c)
+	}
+
+	conn, err := net.DialTimeout("tcp", srvAddress, params.TimeOut)
+	if err != nil {
+		return nil, errors.Wrapf(err, "timeout connecting to %s", srvAddress)
+	}
+
+	c, err = smtp.NewClient(conn, params.Host)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to dial")
+	}
+
+	return c, authenticate(c)
+}

backend/app/notify/email_test.go

@@ -0,0 +1,447 @@
+package notify
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"io"
+	"net/smtp"
+	"sync"
+	"testing"
+	"text/template"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/umputun/remark42/backend/app/store"
+)
+
+func TestEmailNew(t *testing.T) {
+	emailParams := EmailParams{
+		From:                     "test@from",
+		VerificationTemplatePath: "testdata/verification.html.tmpl",
+		MsgTemplatePath:          "testdata/msg.html.tmpl",
+	}
+	smtpParams := SMTPParams{
+		Host:     "test@host",
+		Port:     1000,
+		TLS:      true,
+		Username: "test@username",
+		Password: "test@password",
+		TimeOut:  time.Second,
+	}
+
+	email, err := NewEmail(emailParams, smtpParams)
+
+	assert.NoError(t, err)
+	assert.NotNil(t, email, "email returned")
+
+	assert.NotNil(t, email.msgTmpl, "e.template is set")
+	assert.Equal(t, emailParams.From, email.EmailParams.From, "emailParams.From unchanged after creation")
+	if smtpParams.TimeOut == 0 {
+		assert.Equal(t, defaultEmailTimeout, email.TimeOut, "empty emailParams.TimeOut changed to default")
+	} else {
+		assert.Equal(t, smtpParams.TimeOut, email.TimeOut, "emailParams.TimOut unchanged after creation")
+	}
+	assert.Equal(t, smtpParams.Host, email.Host, "emailParams.Host unchanged after creation")
+	assert.Equal(t, smtpParams.Username, email.Username, "emailParams.Username unchanged after creation")
+	assert.Equal(t, smtpParams.Password, email.Password, "emailParams.Password unchanged after creation")
+	assert.Equal(t, smtpParams.Port, email.Port, "emailParams.Port unchanged after creation")
+	assert.Equal(t, smtpParams.TLS, email.TLS, "emailParams.TLS unchanged after creation")
+}
+
+func Test_initTemplatesErr(t *testing.T) {
+	testSet := []struct {
+		name        string
+		errText     string
+		emailParams EmailParams
+	}{
+		{
+			name:    "with wrong path to verification template",
+			errText: "can't read verification template: open notfount.tmpl: no such file or directory",
+			emailParams: EmailParams{
+				VerificationTemplatePath: "notfount.tmpl",
+				MsgTemplatePath:          "testdata/msg.html.tmpl",
+			},
+		},
+		{
+			name:    "with wrong path to message template",
+			errText: "can't read message template: open notfount.tmpl: no such file or directory",
+			emailParams: EmailParams{
+				VerificationTemplatePath: "testdata/verification.html.tmpl",
+				MsgTemplatePath:          "notfount.tmpl",
+			},
+		},
+		{
+			name:    "with error on read verification template",
+			errText: "can't parse verification template: template: verifyTmpl",
+			emailParams: EmailParams{
+				VerificationTemplatePath: "testdata/bad.html.tmpl",
+				MsgTemplatePath:          "testdata/msg.html.tmpl",
+			},
+		},
+		{
+			name:    "with error on read message template",
+			errText: "can't parse message template: template: msgTmpl",
+			emailParams: EmailParams{
+				VerificationTemplatePath: "testdata/verification.html.tmpl",
+				MsgTemplatePath:          "testdata/bad.html.tmpl",
+			},
+		},
+	}
+
+	for _, d := range testSet {
+		d := d
+		t.Run(d.name, func(t *testing.T) {
+			e := Email{EmailParams: d.emailParams}
+			err := e.setTemplates()
+			require.Error(t, err)
+			assert.Contains(t, err.Error(), d.errText)
+		})
+	}
+}
+
+func TestEmailSendErrors(t *testing.T) {
+	var err error
+	e := Email{}
+	e.TokenGenFn = TokenGenFn
+
+	e.verifyTmpl, err = template.New("test").Parse("{{.Test}}")
+	assert.NoError(t, err)
+	assert.EqualError(t, e.SendVerification(context.Background(), VerificationRequest{Email: "bad@example.org", Token: "some"}),
+		"error executing template to build verification message: template: test:1:2: executing \"test\" at <.Test>: can't evaluate field Test in type notify.verifyTmplData")
+
+	e.msgTmpl, err = template.New("test").Parse("{{.Test}}")
+	assert.NoError(t, err)
+	assert.EqualError(t, e.Send(context.Background(), Request{Comment: store.Comment{ID: "999"}, parent: store.Comment{User: store.User{ID: "test"}}, Emails: []string{"bad@example.org"}}),
+		"1 error occurred:\n\t* problem sending user email notification to \"bad@example.org\": "+
+			"error executing template to build comment reply message: "+
+			"template: test:1:2: executing \"test\" at <.Test>: "+
+			"can't evaluate field Test in type notify.msgTmplData\n\n")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	assert.EqualError(t, e.Send(ctx, Request{Comment: store.Comment{ID: "999"}, parent: store.Comment{User: store.User{ID: "test"}}, Emails: []string{"bad@example.org"}}),
+		"sending email messages about comment \"999\" aborted due to canceled context")
+
+	e.smtp = &fakeTestSMTP{}
+	assert.EqualError(t, e.Send(context.Background(), Request{Comment: store.Comment{ID: "999"}, parent: store.Comment{User: store.User{ID: "error"}}, Emails: []string{"bad@example.org"}}),
+		"1 error occurred:\n\t* problem sending user email notification to \"bad@example.org\":"+
+			" error creating token for unsubscribe link: token generation error\n\n")
+}
+
+func TestEmailSend_ExitConditions(t *testing.T) {
+	email, err := NewEmail(EmailParams{
+		VerificationTemplatePath: "testdata/verification.html.tmpl",
+		MsgTemplatePath:          "testdata/msg.html.tmpl",
+	}, SMTPParams{})
+	assert.NoError(t, err)
+	assert.NotNil(t, email, "expecting email returned")
+	// prevent triggering e.autoFlush creation
+	emptyRequest := Request{Comment: store.Comment{ID: "999"}}
+	assert.NoError(t, email.Send(context.Background(), emptyRequest),
+		"Message without Emails and AdminEmails is not sent and returns nil")
+}
+
+func TestEmailSendClientError(t *testing.T) {
+	var testSet = []struct {
+		name string
+		smtp *fakeTestSMTP
+		err  string
+	}{
+		{name: "failed to verify receiver", smtp: &fakeTestSMTP{fail: map[string]bool{"mail": true}},
+			err: "bad from address \"\": failed to verify sender"},
+		{name: "failed to verify sender", smtp: &fakeTestSMTP{fail: map[string]bool{"rcpt": true}},
+			err: "bad to address \"\": failed to verify receiver"},
+		{name: "failed to close connection", smtp: &fakeTestSMTP{fail: map[string]bool{"quit": true, "close": true}}},
+		{name: "failed to make email writer", smtp: &fakeTestSMTP{fail: map[string]bool{"data": true}},
+			err: "can't make email writer: failed to send"},
+	}
+	for _, d := range testSet {
+		d := d
+		t.Run(d.name, func(t *testing.T) {
+			e := Email{smtp: d.smtp}
+			if d.err != "" {
+				assert.EqualError(t, e.sendMessage(emailMessage{}), d.err,
+					"expected error for e.sendMessage")
+			} else {
+				assert.NoError(t, e.sendMessage(emailMessage{}),
+					"expected no error for e.sendMessage")
+			}
+		})
+	}
+	e := Email{}
+	e.smtp = nil
+	assert.Error(t, e.sendMessage(emailMessage{}),
+		"nil e.smtp should return error")
+	e.smtp = &fakeTestSMTP{}
+	assert.NoError(t, e.sendMessage(emailMessage{}), "",
+		"no error expected for e.sendMessage in normal flow")
+	e.smtp = &fakeTestSMTP{fail: map[string]bool{"quit": true}}
+	assert.NoError(t, e.sendMessage(emailMessage{}), "",
+		"no error expected for e.sendMessage with failed smtpClient.Quit but successful smtpClient.Close")
+	e.smtp = &fakeTestSMTP{fail: map[string]bool{"create": true}}
+	assert.EqualError(t, e.sendMessage(emailMessage{}), "failed to make smtp Create: failed to create client",
+		"e.send called without smtpClient set returns error")
+}
+
+func TestEmail_DefaultTemplates(t *testing.T) {
+	email, err := NewEmail(EmailParams{}, SMTPParams{})
+	assert.Error(t, err)
+	assert.Nil(t, email)
+	email, err = NewEmail(EmailParams{VerificationTemplatePath: "testdata/verification.html.tmpl"}, SMTPParams{})
+	assert.Error(t, err)
+	assert.Nil(t, email)
+}
+
+func TestEmail_Send(t *testing.T) {
+	email, err := NewEmail(EmailParams{
+		From:                     "from@example.org",
+		VerificationTemplatePath: "testdata/verification.html.tmpl",
+		MsgTemplatePath:          "testdata/msg.html.tmpl",
+	}, SMTPParams{})
+	assert.NoError(t, err)
+	assert.NotNil(t, email)
+	fakeSMTP := fakeTestSMTP{}
+	email.smtp = &fakeSMTP
+	email.TokenGenFn = TokenGenFn
+	email.UnsubscribeURL = "https://remark42.com/api/v1/email/unsubscribe"
+	req := Request{
+		Comment: store.Comment{ID: "999", User: store.User{ID: "1", Name: "test_user"}, ParentID: "1", PostTitle: "test_title"},
+		parent:  store.Comment{ID: "1", User: store.User{ID: "999", Name: "parent_user"}},
+		Emails:  []string{"test@example.org"},
+	}
+	assert.NoError(t, email.Send(context.TODO(), req))
+	assert.Equal(t, "from@example.org", fakeSMTP.readMail())
+	assert.Equal(t, 1, fakeSMTP.readQuitCount())
+	assert.Equal(t, "test@example.org", fakeSMTP.readRcpt())
+	// test buildMessageFromRequest separately for message text
+	res, err := email.buildMessageFromRequest(req, req.Emails[0], false)
+	assert.NoError(t, err)
+	assert.Contains(t, res, `From: from@example.org
+To: test@example.org
+Subject: New reply to your comment for "test_title"
+Content-Transfer-Encoding: quoted-printable
+MIME-version: 1.0
+Content-Type: text/html; charset="UTF-8"
+List-Unsubscribe-Post: List-Unsubscribe=One-Click
+List-Unsubscribe: <https://remark42.com/api/v1/email/unsubscribe?site=&tkn=token>
+Date: `)
+
+	// send email to both user and admin, without parent set
+	email.AdminEmails = []string{"admin@example.org"}
+	req = Request{
+		Comment: store.Comment{ID: "999", User: store.User{ID: "1", Name: "test_user"}, PostTitle: "test_title"},
+		Emails:  []string{"test@example.org"},
+	}
+	assert.NoError(t, email.Send(context.TODO(), req))
+	assert.Equal(t, "from@example.org", fakeSMTP.readMail())
+	assert.Equal(t, 3, fakeSMTP.readQuitCount(), "plus two emails: one for user and one for admin")
+	assert.Equal(t, "admin@example.org", fakeSMTP.readRcpt())
+	res, err = email.buildMessageFromRequest(req, email.AdminEmails[0], true)
+	assert.NoError(t, err)
+	assert.Contains(t, res, `From: from@example.org
+To: admin@example.org
+Subject: New comment to your site for "test_title"
+Content-Transfer-Encoding: quoted-printable
+MIME-version: 1.0
+Content-Type: text/html; charset="UTF-8"
+Date: `)
+}
+
+func TestEmail_SendWithUnicodeInSubject(t *testing.T) {
+	email, err := NewEmail(EmailParams{
+		From:                     "from@example.org",
+		VerificationTemplatePath: "testdata/verification.html.tmpl",
+		MsgTemplatePath:          "testdata/msg.html.tmpl",
+	}, SMTPParams{})
+	assert.NoError(t, err)
+	assert.NotNil(t, email)
+	fakeSMTP := fakeTestSMTP{}
+	email.smtp = &fakeSMTP
+	email.TokenGenFn = TokenGenFn
+	email.UnsubscribeURL = "https://remark42.com/api/v1/email/unsubscribe"
+	req := Request{
+		Comment: store.Comment{ID: "999", User: store.User{ID: "1", Name: "test_user"}, ParentID: "1", PostTitle: "Привет"},
+		parent:  store.Comment{ID: "1", User: store.User{ID: "999", Name: "parent_user"}},
+		Emails:  []string{"test@example.org"},
+	}
+	// test buildMessageFromRequest separately for message text
+	res, err := email.buildMessageFromRequest(req, req.Emails[0], false)
+	assert.NoError(t, err)
+	// `=?utf-8?b?TmV3IHJlcGx5IHRvIHlvdXIgY29tbWVudCBmb3IgItCf0YDQuNCy0LXRgiI=?=` -> `New reply to your comment for "Привет"` in base64 + required prefix and suffix
+	assert.Contains(t, res, `From: from@example.org
+To: test@example.org
+Subject: =?utf-8?b?TmV3IHJlcGx5IHRvIHlvdXIgY29tbWVudCBmb3IgItCf0YDQuNCy0LXRgiI=?=
+Content-Transfer-Encoding: quoted-printable
+MIME-version: 1.0
+Content-Type: text/html; charset="UTF-8"
+List-Unsubscribe-Post: List-Unsubscribe=One-Click
+List-Unsubscribe: <https://remark42.com/api/v1/email/unsubscribe?site=&tkn=token>
+Date: `)
+}
+
+func TestEmail_SendVerification(t *testing.T) {
+	email, err := NewEmail(EmailParams{
+		From:                     "from@example.org",
+		VerificationTemplatePath: "testdata/verification.html.tmpl",
+		MsgTemplatePath:          "testdata/msg.html.tmpl",
+	}, SMTPParams{})
+	assert.NoError(t, err)
+	assert.NotNil(t, email)
+	fakeSMTP := fakeTestSMTP{}
+	email.smtp = &fakeSMTP
+	email.TokenGenFn = TokenGenFn
+	// proper VerificationRequest without email
+	req := VerificationRequest{
+		SiteID: "remark",
+		User:   "test_username",
+		Token:  "secret_",
+	}
+	assert.NoError(t, email.SendVerification(context.TODO(), req))
+	assert.Equal(t, "", fakeSMTP.readMail())
+	assert.Equal(t, 0, fakeSMTP.readQuitCount())
+	assert.Equal(t, "", fakeSMTP.readRcpt())
+
+	// proper VerificationRequest with email
+	req.Email = "test@example.org"
+	assert.NoError(t, email.SendVerification(context.TODO(), req))
+	assert.Equal(t, "from@example.org", fakeSMTP.readMail())
+	assert.Equal(t, 1, fakeSMTP.readQuitCount())
+	assert.Equal(t, "test@example.org", fakeSMTP.readRcpt())
+
+	// VerificationRequest with canceled context
+	ctx, cancel := context.WithCancel(context.TODO())
+	cancel()
+	assert.EqualError(t, email.SendVerification(ctx, req), "sending message to \"test_username\" aborted due to canceled context")
+
+	// test buildVerificationMessage separately for message text
+	res, err := email.buildVerificationMessage(req.User, req.Email, req.Token, req.SiteID)
+	assert.NoError(t, err)
+	assert.Contains(t, res, `From: from@example.org
+To: test@example.org
+Subject: Email verification
+Content-Transfer-Encoding: quoted-printable
+MIME-version: 1.0
+Content-Type: text/html; charset="UTF-8"
+Date: `)
+	assert.Contains(t, res, `secret_`)
+	assert.NotContains(t, res, `https://example.org/`)
+	email.SubscribeURL = "https://example.org/subscribe.html?token="
+	res, err = email.buildVerificationMessage(req.User, req.Email, req.Token, req.SiteID)
+	assert.NoError(t, err)
+	assert.Contains(t, res, `From: from@example.org
+To: test@example.org
+Subject: Email verification
+Content-Transfer-Encoding: quoted-printable
+MIME-version: 1.0
+Content-Type: text/html; charset="UTF-8"
+Date: `)
+	assert.Contains(t, res, `https://example.org/subscribe.html?token=3Dsecret_`)
+}
+
+func Test_emailClient_Create(t *testing.T) {
+	creator := emailClient{}
+	client, err := creator.Create(SMTPParams{})
+	assert.Error(t, err, "absence of address to connect results in error")
+	assert.Nil(t, client, "no client returned in case of error")
+}
+
+type fakeTestSMTP struct {
+	fail map[string]bool
+
+	buff       bytes.Buffer
+	mail, rcpt string
+	auth       bool
+	close      bool
+	quitCount  int
+	lock       sync.RWMutex
+}
+
+func (f *fakeTestSMTP) Create(SMTPParams) (smtpClient, error) {
+	if f.fail["create"] {
+		return nil, errors.New("failed to create client")
+	}
+	return f, nil
+}
+
+func (f *fakeTestSMTP) Auth(smtp.Auth) error { f.auth = true; return nil }
+
+func (f *fakeTestSMTP) Mail(m string) error {
+	f.lock.Lock()
+	f.mail = m
+	f.lock.Unlock()
+	if f.fail["mail"] {
+		return errors.New("failed to verify sender")
+	}
+	return nil
+}
+
+func (f *fakeTestSMTP) Rcpt(r string) error {
+	f.lock.Lock()
+	f.rcpt = r
+	f.lock.Unlock()
+	if f.fail["rcpt"] {
+		return errors.New("failed to verify receiver")
+	}
+	return nil
+}
+
+func (f *fakeTestSMTP) Quit() error {
+	f.lock.Lock()
+	f.quitCount++
+	f.lock.Unlock()
+	if f.fail["quit"] {
+		return errors.New("failed to quit")
+	}
+	return nil
+}
+
+func (f *fakeTestSMTP) Close() error {
+	f.close = true
+	if f.fail["close"] {
+		return errors.New("failed to close")
+	}
+	return nil
+}
+
+func (f *fakeTestSMTP) Data() (io.WriteCloser, error) {
+	if f.fail["data"] {
+		return nil, errors.New("failed to send")
+	}
+	return nopCloser{&f.buff}, nil
+}
+
+func (f *fakeTestSMTP) readRcpt() string {
+	f.lock.RLock()
+	defer f.lock.RUnlock()
+	return f.rcpt
+}
+
+func (f *fakeTestSMTP) readMail() string {
+	f.lock.RLock()
+	defer f.lock.RUnlock()
+	return f.mail
+}
+
+func (f *fakeTestSMTP) readQuitCount() int {
+	f.lock.RLock()
+	defer f.lock.RUnlock()
+	return f.quitCount
+}
+
+func TokenGenFn(user, _, _ string) (string, error) {
+	if user == "error" {
+		return "", errors.New("token generation error")
+	}
+	return "token", nil
+}
+
+type nopCloser struct {
+	io.Writer
+}
+
+func (nopCloser) Close() error {
+	return nil
+}

backend/app/notify/notify.go

@@ -9,14 +9,15 @@ import (
 
 	log "github.com/go-pkgz/lgr"
 
-	"github.com/umputun/remark/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store"
 )
 
 // Service delivers notifications to multiple destinations
 type Service struct {
-	dataService  Store
-	destinations []Destination
-	queue        chan request
+	dataService       Store
+	destinations      []Destination
+	queue             chan Request
+	verificationQueue chan VerificationRequest
 
 	closed uint32 // non-zero means closed. uses uint instead of bool for atomic
 	ctx    context.Context
@@ -26,17 +27,34 @@ type Service struct {
 // Destination defines interface for a given destination service, like telegram, email and so on
 type Destination interface {
 	fmt.Stringer
-	Send(ctx context.Context, req request) error
+	Send(context.Context, Request) error
+	SendVerification(context.Context, VerificationRequest) error
 }
 
 // Store defines the minimal interface accessing stored comments used by notifier
 type Store interface {
-	Get(locator store.Locator, id string) (store.Comment, error)
+	Get(locator store.Locator, id string, user store.User) (store.Comment, error)
+	GetUserEmail(siteID string, userID string) (string, error)
+	GetUserTelegram(siteID string, userID string) (string, error)
 }
 
-type request struct {
-	comment store.Comment
-	parent  store.Comment
+// used for email and telegram retrieval from user details
+type getUserDetail func(string, string) (string, error)
+
+// Request notification for a Comment
+type Request struct {
+	Comment   store.Comment
+	parent    store.Comment
+	Emails    []string
+	Telegrams []string
+}
+
+// VerificationRequest notification for user
+type VerificationRequest struct {
+	SiteID string
+	User   string
+	Email  string // if set, send email only
+	Token  string
 }
 
 const defaultQueueSize = 100
@@ -49,11 +67,12 @@ func NewService(dataService Store, size int, destinations ...Destination) *Servi
 	}
 	ctx, cancel := context.WithCancel(context.Background())
 	res := Service{
-		dataService:  dataService,
-		queue:        make(chan request, size),
-		destinations: destinations,
-		ctx:          ctx,
-		cancel:       cancel,
+		dataService:       dataService,
+		queue:             make(chan Request, size),
+		verificationQueue: make(chan VerificationRequest, size),
+		destinations:      destinations,
+		ctx:               ctx,
+		cancel:            cancel,
 	}
 	if len(destinations) > 0 {
 		go res.do()
@@ -62,21 +81,62 @@ func NewService(dataService Store, size int, destinations ...Destination) *Servi
 	return &res
 }
 
-// Submit comment to internal channel if not busy, drop if can't send
-func (s *Service) Submit(comment store.Comment) {
+// Submit Request to internal channel if not busy, drop if can't send
+func (s *Service) Submit(req Request) {
 	if len(s.destinations) == 0 || atomic.LoadUint32(&s.closed) != 0 {
 		return
 	}
-	parentComment := store.Comment{}
-	if s.dataService != nil {
-		if p, err := s.dataService.Get(comment.Locator, comment.ParentID); err == nil {
-			parentComment = p
+	if s.dataService != nil && req.Comment.ParentID != "" {
+		if p, err := s.dataService.Get(req.Comment.Locator, req.Comment.ParentID, store.User{}); err == nil {
+			req.parent = p
+			req.Emails = s.getNotificationTargets(req, p, s.dataService.GetUserEmail)
+			req.Telegrams = s.getNotificationTargets(req, p, s.dataService.GetUserTelegram)
 		}
 	}
 	select {
-	case s.queue <- request{comment: comment, parent: parentComment}:
+	case s.queue <- req:
 	default:
-		log.Printf("[WARN] can't send comment notification to queue, %+v", comment)
+		log.Printf("[WARN] can't send notification to queue, %+v", req.Comment)
+	}
+}
+
+// getNotificationTargets returns list of notification targets (like email or telegram username) for users
+// interested in notifications for provided comment.
+// Targets are not added to the returned list in case the original message
+// is from the same user as the notification receiver.
+// Results are deduplicated.
+func (s *Service) getNotificationTargets(
+	req Request,
+	notifyComment store.Comment,
+	getUserDetail getUserDetail,
+) (result []string) {
+	// add current user email only if the user is not the one who wrote the original comment
+	if notifyComment.User.ID != req.Comment.User.ID {
+		detail, err := getUserDetail(req.Comment.Locator.SiteID, notifyComment.User.ID)
+		if err != nil {
+			log.Printf("[WARN] can't read notification detail for %s, %v", notifyComment.User.ID, err)
+		}
+		if detail != "" {
+			result = append(result, detail)
+		}
+	}
+	if notifyComment.ParentID != "" {
+		if p, err := s.dataService.Get(req.Comment.Locator, notifyComment.ParentID, store.User{}); err == nil {
+			result = append(result, s.getNotificationTargets(req, p, getUserDetail)...)
+		}
+	}
+	return deduplicateStrings(result)
+}
+
+// SubmitVerification to internal channel if not busy, drop if can't send
+func (s *Service) SubmitVerification(req VerificationRequest) {
+	if len(s.destinations) == 0 || atomic.LoadUint32(&s.closed) != 0 {
+		return
+	}
+	select {
+	case s.verificationQueue <- req:
+	default:
+		log.Printf("[WARN] can't send verification to queue, %s for %s", req.User, req.Email)
 	}
 }
 
@@ -85,6 +145,7 @@ func (s *Service) Close() {
 	if s.queue != nil {
 		log.Print("[DEBUG] close notifier")
 		close(s.queue)
+		close(s.verificationQueue)
 		s.cancel()
 		<-s.ctx.Done()
 	}
@@ -92,21 +153,60 @@ func (s *Service) Close() {
 }
 
 func (s *Service) do() {
-	for c := range s.queue {
-		var wg sync.WaitGroup
-		wg.Add(len(s.destinations))
-		for _, dest := range s.destinations {
-			go func(d Destination) {
-				if err := d.Send(s.ctx, c); err != nil {
-					log.Printf("[WARN] failed to send to %s, %s", d, err)
-				}
-				wg.Done()
-			}(dest)
+	defer log.Print("[WARN] terminated notifier")
+	var wg sync.WaitGroup
+	for {
+		select {
+		case c, ok := <-s.queue:
+			if !ok {
+				return
+			}
+			wg.Add(len(s.destinations))
+			for _, dest := range s.destinations {
+				go func(d Destination) {
+					if err := d.Send(s.ctx, c); err != nil {
+						log.Printf("[WARN] failed to send to %s, %s", d, err)
+					}
+					wg.Done()
+				}(dest)
+			}
+			wg.Wait()
+		case v, ok := <-s.verificationQueue:
+			if !ok {
+				return
+			}
+			wg.Add(len(s.destinations))
+			for _, dest := range s.destinations {
+				go func(d Destination) {
+					if err := d.SendVerification(s.ctx, v); err != nil {
+						log.Printf("[WARN] failed to send to %s, %s", d, err)
+					}
+					wg.Done()
+				}(dest)
+			}
+			wg.Wait()
+		case <-s.ctx.Done():
+			return
 		}
-		wg.Wait()
 	}
-	log.Print("[WARN] terminated notifier")
 }
 
 // NopService is do-nothing notifier, without destinations
 var NopService = &Service{}
+
+// deduplicateStrings returns provided slice of strings will all duplicates removed.
+// Resulting slice is not sorted.
+func deduplicateStrings(source []string) []string {
+	set := make(map[string]struct{})
+
+	for _, k := range source {
+		set[k] = struct{}{}
+	}
+
+	result := make([]string, 0, len(set))
+	for k := range set {
+		result = append(result, k)
+	}
+
+	return result
+}

backend/app/notify/notify_mock.go

@@ -0,0 +1,69 @@
+package notify
+
+import (
+	"context"
+	"fmt"
+	"sync"
+	"time"
+
+	log "github.com/go-pkgz/lgr"
+)
+
+// MockDest is a destination mock
+type MockDest struct {
+	data             []Request
+	verificationData []VerificationRequest
+	id               int
+	closed           bool
+	lock             sync.Mutex
+}
+
+// Send mock
+func (m *MockDest) Send(ctx context.Context, r Request) error {
+	m.lock.Lock()
+	defer m.lock.Unlock()
+	select {
+	case <-time.After(10 * time.Millisecond):
+		m.data = append(m.data, r)
+		log.Printf("sent %s -> %d", r.Comment.ID, m.id)
+	case <-ctx.Done():
+		log.Printf("ctx closed %d", m.id)
+		m.closed = true
+	}
+	return nil
+}
+
+// SendVerification mock
+func (m *MockDest) SendVerification(ctx context.Context, v VerificationRequest) error {
+	m.lock.Lock()
+	defer m.lock.Unlock()
+	select {
+	case <-time.After(10 * time.Millisecond):
+		m.verificationData = append(m.verificationData, v)
+		log.Printf("sent verification %s -> %d", v.User, m.id)
+	case <-ctx.Done():
+		log.Printf("verification ctx closed %d", m.id)
+		m.closed = true
+	}
+	return nil
+}
+
+// Get mock
+func (m *MockDest) Get() []Request {
+	m.lock.Lock()
+	defer m.lock.Unlock()
+	res := make([]Request, len(m.data))
+	copy(res, m.data)
+	return res
+}
+
+// GetVerify mock
+func (m *MockDest) GetVerify() []VerificationRequest {
+	m.lock.Lock()
+	defer m.lock.Unlock()
+	res := make([]VerificationRequest, len(m.verificationData))
+	copy(res, m.verificationData)
+	return res
+}
+
+func (m *MockDest) String() string { return fmt.Sprintf("mock id=%d, closed=%v", m.id, m.closed) }

backend/app/notify/notify_test.go

@@ -1,90 +1,120 @@
 package notify
 
 import (
-	"context"
 	"errors"
 	"fmt"
 	"math/rand"
-	"sync"
 	"sync/atomic"
 	"testing"
 	"time"
 
-	log "github.com/go-pkgz/lgr"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 
-	"github.com/umputun/remark/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store"
 )
 
 func TestService_NoDestinations(t *testing.T) {
-	s := NewService(nil, 1)
+	s := NewService(nil, 0)
+	assert.Equal(t, defaultQueueSize, cap(s.queue))
 	assert.NotNil(t, s)
-	s.Submit(store.Comment{ID: "123"})
-	s.Submit(store.Comment{ID: "123"})
-	s.Submit(store.Comment{ID: "123"})
+	s.Submit(Request{Comment: store.Comment{ID: "123"}})
+	s.Submit(Request{Comment: store.Comment{ID: "123"}})
+	s.Submit(Request{Comment: store.Comment{ID: "123"}})
 	s.Close()
 }
 
 func TestService_WithDestinations(t *testing.T) {
-	d1, d2 := &mockDest{id: 1}, &mockDest{id: 2}
+	d1, d2 := &MockDest{id: 1}, &MockDest{id: 2}
 	s := NewService(nil, 1, d1, d2)
 	assert.NotNil(t, s)
 
-	s.Submit(store.Comment{ID: "100"})
+	s.Submit(Request{Comment: store.Comment{ID: "100"}})
 	time.Sleep(time.Millisecond * 110)
-	s.Submit(store.Comment{ID: "101"})
+	s.Submit(Request{Comment: store.Comment{ID: "101"}})
 	time.Sleep(time.Millisecond * 110)
-	s.Submit(store.Comment{ID: "102"})
+	s.Submit(Request{Comment: store.Comment{ID: "102"}})
 	time.Sleep(time.Millisecond * 110)
 	s.Close()
 
-	assert.Equal(t, 3, len(d1.get()), "got all comments to d1")
-	assert.Equal(t, 3, len(d2.get()), "got all comments to d2")
+	require.Equal(t, 3, len(d1.Get()), "got all comments to d1")
+	require.Equal(t, 3, len(d2.Get()), "got all comments to d2")
 
-	assert.Equal(t, "100", d1.get()[0].comment.ID)
-	assert.Equal(t, "101", d1.get()[1].comment.ID)
-	assert.Equal(t, "102", d1.get()[2].comment.ID)
+	assert.Equal(t, "100", d1.Get()[0].Comment.ID)
+	assert.Equal(t, "101", d1.Get()[1].Comment.ID)
+	assert.Equal(t, "102", d1.Get()[2].Comment.ID)
 }
 
 func TestService_WithDrops(t *testing.T) {
-	d1, d2 := &mockDest{id: 1}, &mockDest{id: 2}
+	d1, d2 := &MockDest{id: 1}, &MockDest{id: 2}
 	s := NewService(nil, 1, d1, d2)
 	assert.NotNil(t, s)
 
-	s.Submit(store.Comment{ID: "100"})
-	s.Submit(store.Comment{ID: "101"})
-	time.Sleep(time.Millisecond * 110)
-	s.Submit(store.Comment{ID: "102"})
-	time.Sleep(time.Millisecond * 110)
+	s.Submit(Request{Comment: store.Comment{ID: "100"}})
+	s.Submit(Request{Comment: store.Comment{ID: "101"}})
+	s.Submit(Request{Comment: store.Comment{ID: "102"}})
+	time.Sleep(time.Millisecond * 21)
 	s.Close()
 
-	s.Submit(store.Comment{ID: "111"}) // safe to send after close
+	s.Submit(Request{Comment: store.Comment{ID: "111"}}) // safe to send after close
 
-	assert.Equal(t, 2, len(d1.get()), "one comment dropped from d1")
-	assert.Equal(t, 2, len(d2.get()), "one comment dropped from d2")
+	assert.LessOrEqual(t, len(d1.Get()), 2, "at least one comment from three dropped from d1, got: %v", d1.Get())
+	assert.LessOrEqual(t, len(d2.Get()), 2, "at least one comment from three dropped from d2, got: %v", d2.Get())
+}
+
+func TestService_SubmitVerificationWithDrops(t *testing.T) {
+	d1, d2 := &MockDest{id: 1}, &MockDest{id: 2}
+	s := NewService(nil, 1, d1, d2)
+	assert.NotNil(t, s)
+
+	s.SubmitVerification(VerificationRequest{
+		SiteID: "remark",
+		User:   "testUser",
+		Email:  "test@example.org",
+		Token:  "testToken",
+	})
+	s.SubmitVerification(VerificationRequest{})
+	s.SubmitVerification(VerificationRequest{})
+	time.Sleep(time.Millisecond * 21)
+	s.Close()
+
+	s.SubmitVerification(VerificationRequest{}) // safe to send after close
+
+	assert.LessOrEqual(t, len(d2.GetVerify()), 2, "one request from three dropped from d2, got: %v", d2.GetVerify())
+
+	verifyDest := d1.GetVerify()
+	require.LessOrEqual(t, len(verifyDest), 2, "one request from three dropped from d1, got: %v", verifyDest)
+	assert.Equal(t, "remark", verifyDest[0].SiteID)
+	assert.Equal(t, "testUser", verifyDest[0].User)
+	assert.Equal(t, "test@example.org", verifyDest[0].Email)
+	assert.Equal(t, "testToken", verifyDest[0].Token)
 }
 
 func TestService_Many(t *testing.T) {
-	d1, d2 := &mockDest{id: 1}, &mockDest{id: 2}
+	d1, d2 := &MockDest{id: 1}, &MockDest{id: 2}
 	s := NewService(nil, 5, d1, d2)
 	assert.NotNil(t, s)
 
 	for i := 0; i < 10; i++ {
-		s.Submit(store.Comment{ID: fmt.Sprintf("%d", 100+i)})
-		time.Sleep(time.Millisecond * time.Duration(rand.Int31n(200)))
+		s.Submit(Request{Comment: store.Comment{ID: fmt.Sprintf("%d", 100+i)}})
+		s.SubmitVerification(VerificationRequest{User: fmt.Sprintf("%d", 100+i)})
+		time.Sleep(time.Millisecond * time.Duration(rand.Int31n(20)))
 	}
 	s.Close()
 	time.Sleep(time.Millisecond * 10)
 
-	assert.NotEqual(t, 10, len(d1.get()), "some comments dropped from d1")
-	assert.NotEqual(t, 10, len(d2.get()), "some comments dropped from d2")
+	assert.NotEqual(t, 10, len(d1.Get()), "some comments dropped from d1")
+	assert.NotEqual(t, 10, len(d1.GetVerify()), "some verifications dropped from d1")
+	assert.NotEqual(t, 10, len(d2.Get()), "some comments dropped from d2")
+	assert.NotEqual(t, 10, len(d2.GetVerify()), "some verifications dropped from d2")
 
 	assert.True(t, d1.closed)
 	assert.True(t, d2.closed)
+	assert.Equal(t, "mock id=1, closed=true", d1.String())
 }
 
 func TestService_WithParent(t *testing.T) {
-	dest := &mockDest{id: 1}
+	dest := &MockDest{id: 1}
 	dataStore := &mockStore{data: map[string]store.Comment{}}
 
 	dataStore.data["p1"] = store.Comment{ID: "p1"}
@@ -93,63 +123,184 @@ func TestService_WithParent(t *testing.T) {
 	s := NewService(dataStore, 1, dest)
 	assert.NotNil(t, s)
 
-	s.Submit(store.Comment{ID: "c1", ParentID: "p1"})
+	s.Submit(Request{Comment: store.Comment{ID: "c1", ParentID: "p1"}})
 	time.Sleep(time.Millisecond * 110)
-	s.Submit(store.Comment{ID: "c11", ParentID: "p11"})
+	s.Submit(Request{Comment: store.Comment{ID: "c11", ParentID: "p11"}})
 	time.Sleep(time.Millisecond * 110)
 	s.Close()
 
-	destRes := dest.get()
-	assert.Equal(t, 2, len(destRes), "two comment notified")
-	assert.Equal(t, "p1", destRes[0].comment.ParentID)
+	destRes := dest.Get()
+	require.Equal(t, 2, len(destRes), "two comment notified")
+	assert.Equal(t, "p1", destRes[0].Comment.ParentID)
 	assert.Equal(t, "p1", destRes[0].parent.ID)
-	assert.Equal(t, "p11", destRes[1].comment.ParentID)
+	assert.Equal(t, "p11", destRes[1].Comment.ParentID)
 	assert.Equal(t, "", destRes[1].parent.ID)
 }
 
+func TestService_EmailRetrieval(t *testing.T) {
+	dest := &MockDest{id: 1}
+	dataStore := &mockStore{data: map[string]store.Comment{}, userDetails: map[string]string{}}
+
+	dataStore.data["p1"] = store.Comment{ID: "p1", User: store.User{ID: "u1"}}
+	dataStore.data["p2"] = store.Comment{ID: "p2", ParentID: "p1", User: store.User{ID: "u1"}}
+	dataStore.data["p3"] = store.Comment{ID: "p3", ParentID: "p1", User: store.User{ID: "u2"}}
+	dataStore.data["p4"] = store.Comment{ID: "p4", ParentID: "p3", User: store.User{ID: "u1"}}
+	dataStore.userDetails["u1"] = "u1@example.com"
+
+	s := NewService(dataStore, 1, dest)
+	assert.NotNil(t, s)
+
+	// one comment, one notification
+	s.Submit(Request{Comment: dataStore.data["p1"]})
+	time.Sleep(time.Millisecond * 110)
+
+	destRes := dest.Get()
+	require.Equal(t, 1, len(destRes), "one comment notified")
+	assert.Equal(t, "p1", destRes[0].Comment.ID)
+	assert.Empty(t, destRes[0].parent)
+	assert.Empty(t, destRes[0].Emails)
+
+	// reply to the first comment, same comment as one in original comment
+	s.Submit(Request{Comment: dataStore.data["p2"]})
+	time.Sleep(time.Millisecond * 110)
+
+	destRes = dest.Get()
+	require.Equal(t, 2, len(destRes), "two comment notified")
+	assert.Equal(t, "p2", destRes[1].Comment.ID)
+	assert.Equal(t, "p1", destRes[1].parent.ID)
+	assert.Equal(t, "u1", destRes[1].parent.User.ID)
+	assert.Empty(t, destRes[1].Emails, "u1 is not notified they are the one who left the comment")
+
+	// another reply to the first comment, another user
+	s.Submit(Request{Comment: dataStore.data["p3"]})
+	time.Sleep(time.Millisecond * 110)
+
+	destRes = dest.Get()
+	require.Equal(t, 3, len(destRes), "three comment notified")
+	assert.Equal(t, "p3", destRes[2].Comment.ID)
+	assert.Equal(t, "p1", destRes[2].parent.ID)
+	assert.Equal(t, "u1", destRes[2].parent.User.ID)
+	assert.ElementsMatch(t, []string{"u1@example.com"}, destRes[2].Emails)
+
+	// reply to the last comment by another user, should trigger email retrieval error
+	s.Submit(Request{Comment: dataStore.data["p4"]})
+	time.Sleep(time.Millisecond * 110)
+
+	destRes = dest.Get()
+	require.Equal(t, 4, len(destRes), "four comment notified")
+	assert.Equal(t, "p4", destRes[3].Comment.ID)
+	assert.Equal(t, "p3", destRes[3].parent.ID)
+	assert.Equal(t, "u2", destRes[3].parent.User.ID)
+	assert.Empty(t, destRes[3].Emails, "no email can be retrieved for u2")
+
+	s.Close()
+}
+
+func TestService_Recursive(t *testing.T) {
+	dest := &MockDest{id: 1}
+	dataStore := &mockStore{data: map[string]store.Comment{}, userDetails: map[string]string{}}
+
+	dataStore.data["p1"] = store.Comment{ID: "p1", User: store.User{ID: "u1"}}
+	dataStore.data["p2"] = store.Comment{ID: "p2", ParentID: "p1", User: store.User{ID: "u2"}}
+	dataStore.data["p3"] = store.Comment{ID: "p3", ParentID: "p2", User: store.User{ID: "u3"}}
+	dataStore.data["p4"] = store.Comment{ID: "p4", ParentID: "p3", User: store.User{ID: "u1"}}
+	dataStore.data["p5"] = store.Comment{ID: "p5", ParentID: "p4", User: store.User{ID: "u4"}}
+	dataStore.userDetails["u1"] = "u1@example.com"
+	// second comment goes without email address for notification
+	dataStore.userDetails["u3"] = "u3@example.com"
+
+	s := NewService(dataStore, 1, dest)
+	assert.NotNil(t, s)
+
+	// one comment from u1 with email set
+	s.Submit(Request{Comment: dataStore.data["p1"]})
+	time.Sleep(time.Millisecond * 110)
+
+	destRes := dest.Get()
+	require.Equal(t, 1, len(destRes), "one comment notified")
+	assert.Equal(t, "p1", destRes[0].Comment.ID)
+	assert.Empty(t, destRes[0].parent)
+	assert.Empty(t, destRes[0].Emails)
+
+	// reply to the first comment from u2 without email set
+	s.Submit(Request{Comment: dataStore.data["p2"]})
+	time.Sleep(time.Millisecond * 110)
+
+	destRes = dest.Get()
+	require.Equal(t, 2, len(destRes), "two comment notified")
+	assert.Equal(t, "p2", destRes[1].Comment.ID)
+	assert.Equal(t, "p1", destRes[1].parent.ID)
+	assert.Equal(t, "u1", destRes[1].parent.User.ID)
+	assert.ElementsMatch(t, []string{"u1@example.com"}, destRes[1].Emails)
+
+	// reply to the second comment from u3 with email set
+	s.Submit(Request{Comment: dataStore.data["p3"]})
+	time.Sleep(time.Millisecond * 110)
+
+	destRes = dest.Get()
+	require.Equal(t, 3, len(destRes), "three comment notified")
+	assert.Equal(t, "p3", destRes[2].Comment.ID)
+	assert.Equal(t, "p2", destRes[2].parent.ID)
+	assert.Equal(t, "u2", destRes[2].parent.User.ID)
+	assert.ElementsMatch(t, []string{"u1@example.com"}, destRes[2].Emails)
+
+	// reply to the third comment from u1 (author of the first comment), only u3 should be notified
+	s.Submit(Request{Comment: dataStore.data["p4"]})
+	time.Sleep(time.Millisecond * 110)
+
+	destRes = dest.Get()
+	require.Equal(t, 4, len(destRes), "four comment notified once each")
+	assert.Equal(t, "p4", destRes[3].Comment.ID)
+	assert.Equal(t, "p3", destRes[3].parent.ID)
+	assert.Equal(t, "u3", destRes[3].parent.User.ID)
+	assert.ElementsMatch(t, []string{"u3@example.com"}, destRes[3].Emails, "u1 is not notified they are the one who left the comment")
+
+	// reply to the fourth comment from u4, u1 and u3 should be notified once as a result
+	s.Submit(Request{Comment: dataStore.data["p5"]})
+	time.Sleep(time.Millisecond * 110)
+
+	destRes = dest.Get()
+	require.Equal(t, 5, len(destRes), "four comment notified once each")
+	assert.Equal(t, "p5", destRes[4].Comment.ID)
+	assert.Equal(t, "p4", destRes[4].parent.ID)
+	assert.Equal(t, "u1", destRes[4].parent.User.ID)
+	assert.ElementsMatch(t, []string{"u1@example.com", "u3@example.com"}, destRes[4].Emails, "u3 and u1 notified once")
+
+	s.Close()
+}
+
 func TestService_Nop(t *testing.T) {
 	s := NopService
-	s.Submit(store.Comment{})
+	s.Submit(Request{Comment: store.Comment{}})
 	s.Close()
 	assert.Equal(t, uint32(1), atomic.LoadUint32(&s.closed))
 }
 
-type mockDest struct {
-	data   []request
-	id     int
-	closed bool
-	lock   sync.Mutex
+type mockStore struct {
+	data        map[string]store.Comment
+	userDetails map[string]string
 }
 
-func (m *mockDest) Send(ctx context.Context, r request) error {
-	m.lock.Lock()
-	defer m.lock.Unlock()
-	select {
-	case <-time.After(100 * time.Millisecond):
-		m.data = append(m.data, r)
-		log.Printf("sent %s -> %d", r.comment.ID, m.id)
-	case <-ctx.Done():
-		log.Printf("ctx closed %d", m.id)
-		m.closed = true
+func (m mockStore) getUserDetail(userID string) (string, error) {
+	detail, ok := m.userDetails[userID]
+	if !ok {
+		return "", errors.New("no such user")
 	}
-	return nil
+	return detail, nil
 }
 
-func (m *mockDest) get() []request {
-	m.lock.Lock()
-	defer m.lock.Unlock()
-	res := make([]request, len(m.data))
-	copy(res, m.data)
-	return res
-}
-func (m *mockDest) String() string { return fmt.Sprintf("mock id=%d, closed=%v", m.id, m.closed) }
-
-type mockStore struct{ data map[string]store.Comment }
-
-func (m *mockStore) Get(_ store.Locator, id string) (store.Comment, error) {
+func (m mockStore) Get(_ store.Locator, id string, _ store.User) (store.Comment, error) {
 	res, ok := m.data[id]
 	if !ok {
 		return store.Comment{}, errors.New("no such id")
 	}
 	return res, nil
 }
+
+func (m mockStore) GetUserEmail(_, userID string) (string, error) {
+	return m.getUserDetail(userID)
+}
+
+func (m mockStore) GetUserTelegram(_, userID string) (string, error) {
+	return m.getUserDetail(userID)
+}

backend/app/notify/slack.go

@@ -0,0 +1,101 @@
+package notify
+
+import (
+	"context"
+
+	log "github.com/go-pkgz/lgr"
+	"github.com/pkg/errors"
+	"github.com/slack-go/slack"
+)
+
+// Slack implements notify.Destination for Slack
+type Slack struct {
+	channelID   string
+	channelName string
+	client      *slack.Client
+}
+
+// NewSlack makes Slack bot for notifications
+func NewSlack(token, channelName string, opts ...slack.Option) (*Slack, error) {
+
+	if channelName == "" {
+		channelName = "general"
+	}
+
+	client := slack.New(token, opts...)
+	res := &Slack{client: client, channelName: channelName}
+
+	channelID, err := res.findChannelIDByName(channelName)
+	if err != nil {
+		return nil, errors.Wrap(err, "can not find slack channel '"+channelName+"'")
+	}
+
+	res.channelID = channelID
+	log.Printf("[DEBUG] create new slack notifier for chan %s", channelID)
+
+	return res, nil
+}
+
+// Send to Slack channel
+func (t *Slack) Send(ctx context.Context, req Request) error {
+
+	log.Printf("[DEBUG] send slack notification, comment id %s", req.Comment.ID)
+
+	user := req.Comment.User.Name
+	if req.Comment.ParentID != "" {
+		user += " → " + req.parent.User.Name
+	}
+
+	title := "↦ original comment"
+	if req.Comment.PostTitle != "" {
+		title = "↦ " + req.Comment.PostTitle
+	}
+
+	_, _, err := t.client.PostMessageContext(ctx, t.channelID,
+		slack.MsgOptionText("New comment from "+user, false),
+		slack.MsgOptionAttachments(
+			slack.Attachment{
+				TitleLink: req.Comment.Locator.URL + uiNav + req.Comment.ID,
+				Title:     title,
+				Text:      req.Comment.Orig,
+			},
+		),
+	)
+
+	return err
+
+}
+
+// SendVerification is not implemented for Slack
+func (t *Slack) SendVerification(_ context.Context, _ VerificationRequest) error {
+	return nil
+}
+
+func (t *Slack) String() string {
+	return "slack: " + t.channelName + " (" + t.channelID + ")"
+}
+
+func (t *Slack) findChannelIDByName(name string) (string, error) {
+
+	params := slack.GetConversationsParameters{}
+	for {
+
+		chans, next, err := t.client.GetConversations(&params)
+		if err != nil {
+			return "", err
+		}
+
+		for _, channel := range chans {
+			if channel.Name == name {
+				return channel.ID, nil
+			}
+		}
+
+		if next == "" {
+			break
+		}
+		params.Cursor = next
+
+	}
+	return "", errors.New("no such channel")
+}

backend/app/notify/slack_test.go

@@ -0,0 +1,170 @@
+package notify
+
+import (
+	"context"
+	"log"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/slack-go/slack"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/umputun/remark42/backend/app/store"
+)
+
+func TestSlack_New(t *testing.T) {
+
+	ts := newMockSlackServer()
+	defer ts.Close()
+
+	tb, err := ts.newClient("general")
+	assert.NoError(t, err)
+	assert.NotNil(t, tb)
+	assert.Equal(t, "C12345678", tb.channelID)
+
+	_, err = ts.newClient("unknown-channel")
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "no such channel")
+
+}
+
+func TestSlack_Send(t *testing.T) {
+
+	ts := newMockSlackServer()
+	defer ts.Close()
+
+	tb, err := ts.newClient("general")
+	assert.NoError(t, err)
+	assert.NotNil(t, tb)
+
+	c := store.Comment{Text: "some text", ParentID: "1", ID: "999"}
+	c.User.Name = "from"
+	cp := store.Comment{Text: "some parent text"}
+	cp.User.Name = "to"
+
+	err = tb.Send(context.TODO(), Request{Comment: c, parent: cp})
+	assert.NoError(t, err)
+	c.PostTitle = "test title"
+	err = tb.Send(context.TODO(), Request{Comment: c, parent: cp})
+	assert.NoError(t, err)
+
+	err = tb.Send(context.TODO(), Request{Comment: c, parent: cp})
+	assert.NoError(t, err)
+	c.PostTitle = "[test title]"
+	err = tb.Send(context.TODO(), Request{Comment: c, parent: cp})
+	assert.NoError(t, err)
+
+	tb, err = ts.newClient("general")
+	assert.NoError(t, err)
+	ts.isServerDown = true
+	err = tb.Send(context.TODO(), Request{Comment: c, parent: cp})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "slack server error", "send on broken client")
+
+}
+
+func TestSlack_Name(t *testing.T) {
+	ts := newMockSlackServer()
+	defer ts.Close()
+
+	tb, err := ts.newClient("general")
+	assert.NoError(t, err)
+	assert.NotNil(t, tb)
+	assert.Equal(t, "slack: general (C12345678)", tb.String())
+}
+
+func TestSlack_SendVerification(t *testing.T) {
+	ts := newMockSlackServer()
+	defer ts.Close()
+
+	tb, err := ts.newClient("general")
+	assert.NoError(t, err)
+	assert.NotNil(t, tb)
+
+	err = tb.SendVerification(context.TODO(), VerificationRequest{})
+	assert.NoError(t, err)
+}
+
+type mockSlackServer struct {
+	*httptest.Server
+	isServerDown bool
+}
+
+func (ts *mockSlackServer) newClient(channelName string) (*Slack, error) {
+	return NewSlack("any-token", channelName, slack.OptionAPIURL(ts.URL+"/"))
+}
+
+func newMockSlackServer() *mockSlackServer {
+
+	mockServer := mockSlackServer{}
+	router := chi.NewRouter()
+	router.Post("/conversations.list", func(w http.ResponseWriter, r *http.Request) {
+		s := `{
+		    "ok": true,
+		    "channels": [
+		        {
+		            "id": "C12345678",
+		            "name": "general",
+		            "is_channel": true,
+		            "is_group": false,
+		            "is_im": false,
+		            "created": 1503888888,
+		            "is_archived": false,
+		            "is_general": false,
+		            "unlinked": 0,
+		            "name_normalized": "random",
+		            "is_shared": false,
+		            "parent_conversation": null,
+		            "creator": "U12345678",
+		            "is_ext_shared": false,
+		            "is_org_shared": false,
+		            "pending_shared": [],
+		            "pending_connected_team_ids": [],
+		            "is_pending_ext_shared": false,
+		            "is_member": false,
+		            "is_private": false,
+		            "is_mpim": false,
+		            "previous_names": [],
+		            "num_members": 1
+		        }
+		    ],
+		    "response_metadata": {
+		        "next_cursor": ""
+		    }
+		}`
+		_, _ = w.Write([]byte(s))
+	})
+
+	router.Post("/chat.postMessage", func(w http.ResponseWriter, r *http.Request) {
+
+		if mockServer.isServerDown {
+			w.WriteHeader(500)
+
+		} else {
+			s := `{
+			    "ok": true,
+			    "channel": "C12345678",
+			    "ts": "1617008342.000100",
+			    "message": {
+			        "type": "message",
+			        "subtype": "bot_message",
+			        "text": "wowo",
+			        "ts": "1617008342.000100",
+			        "username": "slackbot",
+			        "bot_id": "B12345678"
+			    }
+			}`
+			_, _ = w.Write([]byte(s))
+		}
+	})
+
+	router.NotFound(func(w http.ResponseWriter, r *http.Request) {
+		log.Printf("..... 404 for %s .....\n", r.URL)
+	})
+
+	mockServer.Server = httptest.NewServer(router)
+	return &mockServer
+}

backend/app/notify/telegram.go

@@ -5,144 +5,494 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"html"
+	"golang.org/x/net/html"
+	"io"
 	"net/http"
+	neturl "net/url"
 	"strconv"
+	"strings"
+	"sync"
+	"sync/atomic"
 	"time"
 
+	"github.com/hashicorp/go-multierror"
+	"github.com/microcosm-cc/bluemonday"
+
 	log "github.com/go-pkgz/lgr"
 	"github.com/go-pkgz/repeater"
 	"github.com/pkg/errors"
 )
 
+// TelegramParams contain settings for telegram notifications
+type TelegramParams struct {
+	AdminChannelID       string        // unique identifier for the target chat or username of the target channel (in the format @channelusername)
+	Token                string        // token for telegram bot API interactions
+	Timeout              time.Duration // http client timeout
+	UserNotifications    bool          // flag which enables user notifications
+	ErrorMsg, SuccessMsg string        // messages for successful and unsuccessful subscription requests to bot
+
+	apiPrefix string // changed only in tests
+}
+
 // Telegram implements notify.Destination for telegram
 type Telegram struct {
-	channelID string // unique identifier for the target chat or username of the target channel (in the format @channelusername)
-	token     string
-	apiPrefix string
-	timeout   time.Duration
+	TelegramParams
+
+	// Identifier of the first update to be requested.
+	// Should be equal to LastSeenUpdateID + 1
+	// See https://core.telegram.org/bots/api#getupdates
+	updateOffset           int
+	apiPollInterval        time.Duration // interval to check updates from Telegram API and answer to users
+	expiredCleanupInterval time.Duration // interval to check and clean up expired notification requests
+	username               string        // bot username
+	run                    int32         // non-zero if Run goroutine has started
+	requests               struct {
+		sync.RWMutex
+		data map[string]tgAuthRequest
+	}
+}
+
+// telegramMsg is used to send message trough Telegram bot API
+type telegramMsg struct {
+	Text      string `json:"text"`
+	ParseMode string `json:"parse_mode,omitempty"`
+}
+
+type tgAuthRequest struct {
+	confirmed  bool // whether login request has been confirmed and user info set
+	expires    time.Time
+	telegramID string
+	user       string
+	site       string
+}
+
+// TelegramBotInfo structure contains information about telegram bot, which is used from whole telegram API response
+type TelegramBotInfo struct {
+	Username string `json:"username"`
 }
 
 const telegramTimeOut = 5000 * time.Millisecond
 const telegramAPIPrefix = "https://api.telegram.org/bot"
+const tgPollInterval = time.Second * 5
+const tgCleanupInterval = time.Minute * 5
 
 // NewTelegram makes telegram bot for notifications
-func NewTelegram(token string, channelID string, timeout time.Duration, api string) (*Telegram, error) {
+func NewTelegram(params TelegramParams) (*Telegram, error) {
+	res := Telegram{TelegramParams: params}
 
-	if _, err := strconv.ParseInt(channelID, 10, 64); err != nil {
-		channelID = "@" + channelID // if channelID not a number enforce @ prefix
-	}
-
-	res := Telegram{channelID: channelID, token: token, apiPrefix: api, timeout: timeout}
 	if res.apiPrefix == "" {
 		res.apiPrefix = telegramAPIPrefix
 	}
-	if res.timeout == 0 {
-		res.timeout = telegramTimeOut
+	if res.Timeout == 0 {
+		res.Timeout = telegramTimeOut
 	}
-	log.Printf("[DEBUG] create new telegram notifier for cham %s, timeout=%s, api=%s", channelID, res.timeout, res.timeout)
+	res.apiPollInterval = tgPollInterval
+	res.expiredCleanupInterval = tgCleanupInterval
+	log.Printf("[DEBUG] create new telegram notifier for api=%s, timeout=%s", res.apiPrefix, res.Timeout)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
 	defer cancel()
 
-	err := repeater.NewDefault(5, time.Millisecond*250).Do(ctx, func() error {
-		client := http.Client{Timeout: telegramTimeOut}
-		resp, err := client.Get(fmt.Sprintf("%s%s/getMe", res.apiPrefix, token))
-		if err != nil {
-			return errors.Wrap(err, "can't initialize telegram notifications")
-		}
-		defer func() {
-			if err = resp.Body.Close(); err != nil {
-				log.Printf("[WARN] can't close request body, %s", err)
-			}
-		}()
+	botInfo, err := res.botInfo(ctx)
+	if err != nil {
+		return nil, errors.Wrapf(err, "can't retrieve bot info from Telegram API")
+	}
+	res.username = botInfo.Username
 
-		if resp.StatusCode != http.StatusOK {
-			return errors.Errorf("unexpected telegram status code %d", resp.StatusCode)
-		}
+	res.requests.data = make(map[string]tgAuthRequest)
 
-		tgResp := struct {
-			OK     bool `json:"ok"`
-			Result struct {
-				FirstName string `json:"first_name"`
-				ID        uint64 `json:"id"`
-				IsBot     bool   `json:"is_bot"`
-				UserName  string `json:"username"`
-			}
-		}{}
-
-		if err = json.NewDecoder(resp.Body).Decode(&tgResp); err != nil {
-			return errors.Wrap(err, "can't decode response")
-		}
-
-		if !tgResp.OK || !tgResp.Result.IsBot {
-			return errors.Errorf("unexpected telegram response %+v", tgResp)
-		}
-		return nil
-	})
-
-	return &res, err
+	return &res, nil
 }
 
-// Send to telegram channel
-func (t *Telegram) Send(ctx context.Context, req request) error {
-	client := http.Client{Timeout: telegramTimeOut}
-	log.Printf("[DEBUG] send telegram notification to %s, comment id %s", t.channelID, req.comment.ID)
+// Send to telegram recipients
+func (t *Telegram) Send(ctx context.Context, req Request) error {
+	log.Printf("[DEBUG] send telegram notification for comment ID %s", req.Comment.ID)
+	result := new(multierror.Error)
 
-	from := req.comment.User.Name
-	if req.comment.ParentID != "" {
-		from += " → " + req.parent.User.Name
+	msg, err := buildMessage(req)
+	if err != nil {
+		return errors.Wrapf(err, "failed to make telegram message body for comment ID %s", req.Comment.ID)
 	}
-	from = "*" + from + "*"
-	link := fmt.Sprintf("↦ [original comment](%s)", req.comment.Locator.URL+uiNav+req.comment.ID)
-	if req.comment.PostTitle != "" {
-		link = fmt.Sprintf("↦ [%s](%s)", req.comment.PostTitle, req.comment.Locator.URL+uiNav+req.comment.ID)
+
+	if t.AdminChannelID != "" {
+		err := t.sendMessage(ctx, msg, t.AdminChannelID)
+		result = multierror.Append(errors.Wrapf(err,
+			"problem sending admin telegram notification about comment ID %s to %s", req.Comment.ID, t.AdminChannelID),
+		)
 	}
-	u := fmt.Sprintf("%s%s/sendMessage?chat_id=%s&parse_mode=Markdown&disable_web_page_preview=true",
-		t.apiPrefix, t.token, t.channelID)
 
-	msg := fmt.Sprintf("%s\n\n%s\n\n%s", from, req.comment.Orig, link)
-	msg = html.UnescapeString(msg)
-	body := struct {
-		Text string `json:"text"`
-	}{Text: msg}
+	if t.UserNotifications {
+		for _, user := range req.Telegrams {
+			err := t.sendMessage(ctx, msg, user)
+			result = multierror.Append(errors.Wrapf(err,
+				"problem sending user telegram notification about comment ID %s to %q", req.Comment.ID, user),
+			)
+		}
+	}
+	return result.ErrorOrNil()
+}
 
+func (t *Telegram) sendMessage(ctx context.Context, b []byte, chatID string) error {
+	if _, err := strconv.ParseInt(chatID, 10, 64); err != nil {
+		chatID = "@" + chatID // if chatID not a number enforce @ prefix
+	}
+
+	url := fmt.Sprintf("sendMessage?chat_id=%s&disable_web_page_preview=true", chatID)
+	return t.Request(ctx, url, b, &struct{}{})
+}
+
+// buildMessage generates message for generic notification about new comment
+func buildMessage(req Request) ([]byte, error) {
+	commentURLPrefix := req.Comment.Locator.URL + uiNav
+
+	msg := fmt.Sprintf(`<a href=%q>%s</a>`, commentURLPrefix+req.Comment.ID, escapeTelegramText(req.Comment.User.Name))
+
+	if req.Comment.ParentID != "" {
+		msg += fmt.Sprintf(" -> <a href=%q>%s</a>", commentURLPrefix+req.parent.ID, escapeTelegramText(req.parent.User.Name))
+	}
+
+	msg += fmt.Sprintf("\n\n%s", telegramSupportedHTML(req.Comment.Text))
+
+	if req.Comment.ParentID != "" {
+		msg += fmt.Sprintf("\n\n\"<i>%s</i>\"", telegramSupportedHTML(req.parent.Text))
+	}
+
+	if req.Comment.PostTitle != "" {
+		msg += fmt.Sprintf("\n\n↦  <a href=%q>%s</a>", req.Comment.Locator.URL, escapeTelegramText(req.Comment.PostTitle))
+	}
+
+	body := telegramMsg{Text: msg, ParseMode: "HTML"}
 	b, err := json.Marshal(body)
 	if err != nil {
-		return errors.Wrap(err, "failed to make telegram body")
+		return nil, err
+	}
+	return b, nil
+}
+
+// returns HTML with only tags allowed in Telegram HTML message payload, also trims ending newlines
+// https://core.telegram.org/bots/api#html-style
+func telegramSupportedHTML(htmlText string) string {
+	adjustedHTMLText := adjustHTMLTags(htmlText)
+	p := bluemonday.NewPolicy()
+	p.AllowElements("b", "strong", "i", "em", "u", "ins", "s", "strike", "del", "a", "code", "pre")
+	p.AllowAttrs("href").OnElements("a")
+	p.AllowAttrs("class").OnElements("code")
+	return strings.TrimRight(p.Sanitize(adjustedHTMLText), "\n")
+}
+
+// returns text sanitized of symbols not allowed inside other HTML tags in Telegram HTML message payload
+// https://core.telegram.org/bots/api#html-style
+func escapeTelegramText(text string) string {
+	// order is important
+	text = strings.ReplaceAll(text, "&", "&amp;")
+	text = strings.ReplaceAll(text, "<", "&lt;")
+	text = strings.ReplaceAll(text, ">", "&gt;")
+	return text
+}
+
+// telegram not allow h1-h6 tags
+// replace these tags with a combination of <b> and <i> for visual distinction
+func adjustHTMLTags(htmlText string) string {
+	buff := strings.Builder{}
+	tokenizer := html.NewTokenizer(strings.NewReader(htmlText))
+	for {
+		if tokenizer.Next() == html.ErrorToken {
+			return buff.String()
+		}
+		token := tokenizer.Token()
+		switch token.Type {
+		case html.StartTagToken, html.EndTagToken:
+			switch token.Data {
+			case "h1", "h2", "h3":
+				if token.Type == html.StartTagToken {
+					buff.WriteString("<b>")
+				}
+				if token.Type == html.EndTagToken {
+					buff.WriteString("</b>")
+				}
+			case "h4", "h5", "h6":
+				if token.Type == html.StartTagToken {
+					buff.WriteString("<i><b>")
+				}
+				if token.Type == html.EndTagToken {
+					buff.WriteString("</b></i>")
+				}
+			default:
+				buff.WriteString(token.String())
+			}
+		default:
+			buff.WriteString(token.String())
+		}
+	}
+}
+
+// SendVerification is not needed for telegram
+func (t *Telegram) SendVerification(_ context.Context, _ VerificationRequest) error {
+	return nil
+}
+
+// TelegramUpdate contains update information, which is used from whole telegram API response
+type TelegramUpdate struct {
+	Result []struct {
+		UpdateID int `json:"update_id"`
+		Message  struct {
+			Chat struct {
+				ID   int    `json:"id"`
+				Name string `json:"first_name"`
+				Type string `json:"type"`
+			} `json:"chat"`
+			Text string `json:"text"`
+		} `json:"message"`
+	} `json:"result"`
+}
+
+// GetBotUsername returns bot username
+func (t *Telegram) GetBotUsername() string {
+	return t.username
+}
+
+// AddToken adds token
+func (t *Telegram) AddToken(token, user, site string, expires time.Time) {
+	t.requests.Lock()
+	t.requests.data[token] = tgAuthRequest{
+		expires: expires,
+		user:    user,
+		site:    site,
+	}
+	t.requests.Unlock()
+}
+
+// CheckToken verifies incoming token, returns the user address if it's confirmed and empty string otherwise
+func (t *Telegram) CheckToken(token, user string) (telegram, site string, err error) {
+	t.requests.RLock()
+	authRequest, ok := t.requests.data[token]
+	t.requests.RUnlock()
+
+	if !ok {
+		return "", "", errors.New("request is not found")
 	}
 
-	r, err := http.NewRequest("POST", u, bytes.NewReader(b))
-	if err != nil {
-		return errors.Wrap(err, "failed to make telegram request")
+	if time.Now().After(authRequest.expires) {
+		t.requests.Lock()
+		delete(t.requests.data, token)
+		t.requests.Unlock()
+		return "", "", errors.New("request expired")
 	}
-	r.Header.Set("Content-Type", "application/json; charset=utf-8")
 
-	r = r.WithContext(ctx)
-	resp, err := client.Do(r)
-	if err != nil {
-		return errors.Wrap(err, "failed to get telegram response")
+	if !authRequest.confirmed {
+		return "", "", errors.New("request is not verified yet")
+	}
+
+	if authRequest.user != user {
+		return "", "", errors.New("user does not match original requester")
+	}
+
+	// Delete request
+	t.requests.Lock()
+	delete(t.requests.data, token)
+	t.requests.Unlock()
+
+	return authRequest.telegramID, authRequest.site, nil
+}
+
+// Run starts processing login requests sent in Telegram, required for user notifications to work
+// Blocks caller
+func (t *Telegram) Run(ctx context.Context) {
+	atomic.AddInt32(&t.run, 1)
+	processUpdatedTicker := time.NewTicker(t.apiPollInterval)
+	cleanupTicker := time.NewTicker(t.expiredCleanupInterval)
+
+	for {
+		select {
+		case <-ctx.Done():
+			processUpdatedTicker.Stop()
+			cleanupTicker.Stop()
+			atomic.AddInt32(&t.run, -1)
+			return
+		case <-processUpdatedTicker.C:
+			updates, err := t.getUpdates(ctx)
+			if err != nil {
+				log.Printf("[WARN] Error while getting telegram updates: %v", err)
+				continue
+			}
+			t.processUpdates(ctx, updates)
+		case <-cleanupTicker.C:
+			now := time.Now()
+			t.requests.Lock()
+			for key, req := range t.requests.data {
+				if now.After(req.expires) {
+					delete(t.requests.data, key)
+				}
+			}
+			t.requests.Unlock()
+		}
+	}
+}
+
+// ProcessUpdate is alternative to Run, it processes provided plain text update from Telegram
+// so that caller could get updates and send it not only there but to multiple sources
+func (t *Telegram) ProcessUpdate(ctx context.Context, textUpdate string) error {
+	if atomic.LoadInt32(&t.run) != 0 {
+		return errors.New("Run goroutine should not be used with ProcessUpdate")
 	}
 	defer func() {
-		if err = resp.Body.Close(); err != nil {
-			log.Printf("[WARN] can't close request body, %s", err)
+		// as Run goroutine is not running, clean up old requests on each update
+		// even if we hit json decode error
+		now := time.Now()
+		t.requests.Lock()
+		for key, req := range t.requests.data {
+			if now.After(req.expires) {
+				delete(t.requests.data, key)
+			}
 		}
+		t.requests.Unlock()
 	}()
-
-	if resp.StatusCode != http.StatusOK {
-		return errors.Errorf("unexpected telegram status code %d for url %q", resp.StatusCode, u)
-	}
-
-	tgResp := struct {
-		OK bool `json:"ok"`
-	}{}
-
-	if err = json.NewDecoder(resp.Body).Decode(&tgResp); err != nil {
-		return errors.Wrap(err, "can't decode telegram response")
+	var updates TelegramUpdate
+	if err := json.Unmarshal([]byte(textUpdate), &updates); err != nil {
+		return errors.Wrap(err, "failed to decode provided telegram update")
 	}
+	t.processUpdates(ctx, &updates)
 	return nil
 }
 
 func (t *Telegram) String() string {
-	return "telegram: " + t.channelID
+	result := "telegram"
+	if t.AdminChannelID != "" {
+		result += " with admin notifications to " + t.AdminChannelID
+	}
+	if t.UserNotifications {
+		result += " with user notifications enabled"
+	}
+	return result
+}
+
+// getUpdates fetches incoming updates
+func (t *Telegram) getUpdates(ctx context.Context) (*TelegramUpdate, error) {
+	url := `getUpdates?allowed_updates=["message"]`
+	if t.updateOffset != 0 {
+		url += fmt.Sprintf("&offset=%d", t.updateOffset)
+	}
+
+	var result TelegramUpdate
+
+	err := t.Request(ctx, url, nil, &result)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to fetch updates")
+	}
+
+	for _, u := range result.Result {
+		if u.UpdateID >= t.updateOffset {
+			t.updateOffset = u.UpdateID + 1
+		}
+	}
+
+	return &result, nil
+}
+
+// processUpdates processes a batch of updates from telegram servers
+func (t *Telegram) processUpdates(ctx context.Context, updates *TelegramUpdate) {
+	for _, update := range updates.Result {
+		if update.Message.Chat.Type != "private" {
+			continue
+		}
+
+		if !strings.HasPrefix(update.Message.Text, "/start ") {
+			continue
+		}
+
+		token := strings.TrimPrefix(update.Message.Text, "/start ")
+
+		t.requests.RLock()
+		authRequest, ok := t.requests.data[token]
+		if !ok { // No such token
+			t.requests.RUnlock()
+			if t.ErrorMsg != "" {
+				if err := t.sendText(ctx, update.Message.Chat.ID, t.ErrorMsg); err != nil {
+					log.Printf("[WARN] failed to notify telegram peer: %v", err)
+				}
+			}
+			continue
+		}
+		t.requests.RUnlock()
+
+		authRequest.confirmed = true
+		authRequest.telegramID = strconv.Itoa(update.Message.Chat.ID)
+
+		t.requests.Lock()
+		t.requests.data[token] = authRequest
+		t.requests.Unlock()
+
+		if err := t.sendText(ctx, update.Message.Chat.ID, t.SuccessMsg); err != nil {
+			log.Printf("[ERROR] failed to notify telegram peer: %v", err)
+		}
+	}
+}
+
+// sendText sends a plain text message to telegram peer
+func (t *Telegram) sendText(ctx context.Context, recipientID int, msg string) error {
+	url := fmt.Sprintf("sendMessage?chat_id=%d&text=%s", recipientID, neturl.PathEscape(msg))
+	return t.Request(ctx, url, nil, &struct{}{})
+}
+
+// botInfo returns info about configured bot
+func (t *Telegram) botInfo(ctx context.Context) (*TelegramBotInfo, error) {
+	var resp = struct {
+		Result *TelegramBotInfo `json:"result"`
+	}{}
+
+	err := t.Request(ctx, "getMe", nil, &resp)
+	if err != nil {
+		return nil, err
+	}
+	if resp.Result == nil {
+		return nil, errors.New("received empty result")
+	}
+
+	return resp.Result, nil
+}
+
+// Request makes a request to the Telegram API and return the result
+func (t *Telegram) Request(ctx context.Context, method string, b []byte, data interface{}) error {
+	return repeater.NewDefault(3, time.Millisecond*250).Do(ctx, func() error {
+		url := fmt.Sprintf("%s%s/%s", t.apiPrefix, t.Token, method)
+
+		var req *http.Request
+		var err error
+		if b == nil {
+			req, err = http.NewRequestWithContext(ctx, "GET", url, http.NoBody)
+		} else {
+			req, err = http.NewRequestWithContext(ctx, "POST", url, bytes.NewReader(b))
+			req.Header.Set("Content-Type", "application/json; charset=utf-8")
+		}
+		if err != nil {
+			return errors.Wrap(err, "failed to create request")
+		}
+
+		client := http.Client{Timeout: t.Timeout}
+		resp, err := client.Do(req)
+		if err != nil {
+			return errors.Wrap(err, "failed to send request")
+		}
+		defer resp.Body.Close()
+
+		if resp.StatusCode != http.StatusOK {
+			return t.parseError(resp.Body, resp.StatusCode)
+		}
+
+		if err = json.NewDecoder(resp.Body).Decode(data); err != nil {
+			return errors.Wrap(err, "failed to decode json response")
+		}
+
+		return nil
+	})
+}
+
+func (t *Telegram) parseError(r io.Reader, statusCode int) error {
+	tgErr := struct {
+		Description string `json:"description"`
+	}{}
+	if err := json.NewDecoder(r).Decode(&tgErr); err != nil {
+		return errors.Errorf("unexpected telegram API status code %d", statusCode)
+	}
+	return errors.Errorf("unexpected telegram API status code %d, error: %q", statusCode, tgErr.Description)
 }

backend/app/notify/telegram_test.go

@@ -4,111 +4,497 @@ import (
 	"context"
 	"net/http"
 	"net/http/httptest"
+	"strings"
 	"testing"
 	"time"
 
-	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/v5"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
-	"github.com/umputun/remark/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store"
 )
 
 func TestTelegram_New(t *testing.T) {
-
-	ts := mockTelegramServer()
+	ts := mockTelegramServer(nil)
 	defer ts.Close()
 
-	tb, err := NewTelegram("good-token", "remark_test", 2*time.Second, ts.URL+"/")
+	tb, err := NewTelegram(TelegramParams{
+		AdminChannelID: "remark_test",
+		Token:          "good-token",
+		apiPrefix:      ts.URL + "/",
+	})
 	assert.NoError(t, err)
 	assert.NotNil(t, tb)
-	assert.Equal(t, "@remark_test", tb.channelID, "@ added")
+	assert.Equal(t, tb.Timeout, time.Second*5)
+	assert.Equal(t, "remark_test", tb.AdminChannelID, "@ added")
+
+	_, err = NewTelegram(TelegramParams{
+		AdminChannelID: "remark_test",
+		Token:          "empty-json",
+		apiPrefix:      ts.URL + "/",
+	})
+	assert.EqualError(t, err, "can't retrieve bot info from Telegram API: received empty result")
 
 	st := time.Now()
-	_, err = NewTelegram("bad-resp", "remark_test", 2*time.Second, ts.URL+"/")
-	assert.EqualError(t, err, "unexpected telegram response {OK:false Result:{FirstName:comments_test ID:707381019 IsBot:false UserName:remark42_test_bot}}")
-	assert.True(t, time.Since(st) >= 250*5*time.Millisecond)
+	_, err = NewTelegram(TelegramParams{
+		AdminChannelID: "remark_test",
+		Token:          "non-json-resp",
+		Timeout:        2 * time.Second,
+		apiPrefix:      ts.URL + "/",
+	})
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "failed to decode json response:")
+	assert.True(t, time.Since(st) >= 250*3*time.Millisecond)
 
-	_, err = NewTelegram("non-json-resp", "remark_test", 2*time.Second, ts.URL+"/")
-	assert.NotNil(t, err)
-	assert.Contains(t, err.Error(), "can't decode response:")
+	_, err = NewTelegram(TelegramParams{
+		AdminChannelID: "remark_test",
+		Token:          "404",
+		Timeout:        2 * time.Second,
+		apiPrefix:      ts.URL + "/",
+	})
+	assert.EqualError(t, err, "can't retrieve bot info from Telegram API: unexpected telegram API status code 404")
 
-	_, err = NewTelegram("404", "remark_test", 2*time.Second, ts.URL+"/")
-	assert.EqualError(t, err, "unexpected telegram status code 404")
+	_, err = NewTelegram(TelegramParams{
+		AdminChannelID: "remark_test",
+		Token:          "no-such-thing",
+		apiPrefix:      "http://127.0.0.1:4321/",
+	})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "can't retrieve bot info from Telegram API")
+	assert.Contains(t, err.Error(), "dial tcp 127.0.0.1:4321: connect: connection refused")
 
-	_, err = NewTelegram("no-such-thing", "remark_test", 2*time.Second, "http://127.0.0.1:4321/")
-	assert.EqualError(t, err, "can't initialize telegram notifications: Get http://127.0.0.1:4321/no-such-thing/getMe: dial tcp 127.0.0.1:4321: connect: connection refused")
-
-	_, err = NewTelegram("good-token", "remark_test", 2*time.Second, "")
+	_, err = NewTelegram(TelegramParams{
+		AdminChannelID: "remark_test",
+		Token:          "no-such-thing",
+		apiPrefix:      "",
+	})
 	assert.Error(t, err, "empty api url not allowed")
 
-	_, err = NewTelegram("good-token", "remark_test", 0, ts.URL+"/")
+	_, err = NewTelegram(TelegramParams{
+		AdminChannelID: "remark_test",
+		Token:          "good-token",
+		Timeout:        2 * time.Second,
+		apiPrefix:      ts.URL + "/",
+	})
 	assert.NoError(t, err, "0 timeout allowed as default")
 
-	tb, err = NewTelegram("good-token", "1234567890", 2*time.Second, ts.URL+"/")
+	tb, err = NewTelegram(TelegramParams{
+		AdminChannelID: "1234567890",
+		Token:          "good-token",
+		apiPrefix:      ts.URL + "/",
+	})
 	assert.NoError(t, err)
 	assert.NotNil(t, tb)
-	assert.Equal(t, "1234567890", tb.channelID, "no @ prefix")
+	assert.Equal(t, "1234567890", tb.AdminChannelID, "no @ prefix")
+}
+
+func TestTelegram_GetBotUsername(t *testing.T) {
+	ts := mockTelegramServer(nil)
+	defer ts.Close()
+
+	tb, err := NewTelegram(TelegramParams{
+		AdminChannelID: "remark_test",
+		Token:          "good-token",
+		apiPrefix:      ts.URL + "/",
+	})
+	assert.NoError(t, err)
+	assert.NotNil(t, tb)
+	assert.Equal(t, "remark42_test_bot", tb.GetBotUsername())
 }
 
 func TestTelegram_Send(t *testing.T) {
-	ts := mockTelegramServer()
+	ts := mockTelegramServer(nil)
 	defer ts.Close()
 
-	tb, err := NewTelegram("good-token", "remark_test", 2*time.Second, ts.URL+"/")
+	tb, err := NewTelegram(TelegramParams{
+		AdminChannelID:    "remark_test",
+		Token:             "good-token",
+		UserNotifications: true,
+		apiPrefix:         ts.URL + "/",
+	})
 	assert.NoError(t, err)
 	assert.NotNil(t, tb)
-	c := store.Comment{Text: "some text", ParentID: "1"}
+	c := store.Comment{Text: "some text", ParentID: "1", ID: "999", Locator: store.Locator{URL: "http://example.org/"}}
 	c.User.Name = "from"
-	cp := store.Comment{Text: "some parent text"}
+	cp := store.Comment{Text: `<p>some parent text with a <a href="http://example.org">link</a> and special text:<br>& < > &</p>`}
 	cp.User.Name = "to"
 
-	err = tb.Send(context.TODO(), request{comment: c, parent: cp})
+	err = tb.Send(context.TODO(), Request{Comment: c, parent: cp, Telegrams: []string{"test_user_channel"}})
 	assert.NoError(t, err)
 	c.PostTitle = "test title"
-	err = tb.Send(context.TODO(), request{comment: c, parent: cp})
+	err = tb.Send(context.TODO(), Request{Comment: c, parent: cp})
 	assert.NoError(t, err)
 
-	tb, err = NewTelegram("non-json-resp", "remark_test", 2*time.Second, ts.URL+"/")
-	assert.NotNil(t, err, "should failed")
-	err = tb.Send(context.TODO(), request{comment: c, parent: cp})
-	require.NotNil(t, err)
-	assert.Contains(t, err.Error(), "unexpected telegram status code 404", "send on broken tg")
+	err = tb.Send(context.TODO(), Request{Comment: c, parent: cp})
+	assert.NoError(t, err)
+	c.PostTitle = "[test title]"
+	err = tb.Send(context.TODO(), Request{Comment: c, parent: cp})
+	assert.NoError(t, err)
 
-	assert.Equal(t, "telegram: @remark_test", tb.String())
+	tb, err = NewTelegram(TelegramParams{
+		AdminChannelID:    "remark_test",
+		Token:             "non-json-resp",
+		UserNotifications: true,
+		apiPrefix:         ts.URL + "/",
+	})
+	assert.Nil(t, tb)
+	assert.Error(t, err, "should fail")
+	tb = &Telegram{
+		TelegramParams: TelegramParams{
+			AdminChannelID:    "remark_test",
+			Token:             "non-json-resp",
+			UserNotifications: true,
+			apiPrefix:         ts.URL + "/",
+		}}
+	err = tb.Send(context.TODO(), Request{Comment: c, parent: cp, Telegrams: []string{"test_user_channel"}})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "unexpected telegram API status code 404", "send on broken tg")
+
+	assert.Equal(t, "telegram with admin notifications to remark_test with user notifications enabled", tb.String())
+
+	// bad API URL
+	tb.apiPrefix = "http://non-existent"
+	err = tb.Send(context.TODO(), Request{Comment: c, parent: cp, Telegrams: []string{"test_user_channel"}})
+	assert.Error(t, err)
+
+	// test buildMessage separately for message text
+	res, err := buildMessage(Request{Comment: c, parent: cp})
+	assert.NoError(t, err)
+	assert.Equal(t, `{"text":"\u003ca href=\"http://example.org/#remark42__comment-999\"\u003efrom\u003c/a\u003e -\u003e \u003ca href=\"http://example.org/#remark42__comment-\"\u003eto\u003c/a\u003e\n\n`+
+		`some text\n\n`+
+		`\"\u003ci\u003esome parent text with a \u003ca href=\"http://example.org\"\u003elink\u003c/a\u003e and special text:\u0026amp; \u0026lt; \u0026gt; \u0026amp;\u003c/i\u003e\"\n\n`+
+		`↦  \u003ca href=\"http://example.org/\"\u003e[test title]\u003c/a\u003e","parse_mode":"HTML"}`,
+		string(res))
+
+	// special case for text with h1-h6 header
+	ch := store.Comment{Text: "<h1>Hello</h1><h6>World</h6>", ID: "555", Locator: store.Locator{URL: "http://example.org/"}}
+	ch.User.Name = "from"
+	res, err = buildMessage(Request{Comment: ch})
+	assert.NoError(t, err)
+	assert.Equal(t, `{"text":"\u003ca href=\"http://example.org/#remark42__comment-555\"\u003efrom\u003c/a\u003e\n\n`+
+		`\u003cb\u003eHello\u003c/b\u003e\u003ci\u003e\u003cb\u003eWorld\u003c/b\u003e\u003c/i\u003e`+
+		`","parse_mode":"HTML"}`,
+		string(res))
 }
 
-func mockTelegramServer() *httptest.Server {
-	router := chi.NewRouter()
-	router.Get("/good-token/getMe", func(w http.ResponseWriter, r *http.Request) {
-		s := `{"ok": true,
+func TestTelegram_SendVerification(t *testing.T) {
+	ts := mockTelegramServer(nil)
+	defer ts.Close()
+
+	tb, err := NewTelegram(TelegramParams{
+		AdminChannelID: "remark_test",
+		Token:          "good-token",
+		apiPrefix:      ts.URL + "/",
+	})
+	assert.NoError(t, err)
+	assert.NotNil(t, tb)
+
+	// empty VerificationRequest should return no error and no nothing, as well as any other
+	assert.NoError(t, tb.SendVerification(context.TODO(), VerificationRequest{}))
+}
+
+const getUpdatesResp = `{
+  "ok": true,
+  "result": [
+     {
+        "update_id": 998,
+        "message": {
+           "chat": {
+              "type": "group"
+           }
+        }
+     },
+     {
+        "update_id": 999,
+        "message": {
+					 "text": "not starting with /start",
+           "chat": {
+              "type": "private"
+           }
+        }
+     },
+     {
+        "update_id": 1000,
+        "message": {
+           "message_id": 4,
+           "from": {
+              "id": 313131313,
+              "is_bot": false,
+              "first_name": "Joe",
+              "username": "joe123",
+              "language_code": "en"
+           },
+           "chat": {
+              "id": 313131313,
+              "first_name": "Joe",
+              "username": "joe123",
+              "type": "private"
+           },
+           "date": 1601665548,
+           "text": "/start token",
+           "entities": [
+              {
+                 "offset": 0,
+                 "length": 6,
+                 "type": "bot_command"
+              }
+           ]
+        }
+     }
+  ]
+}`
+
+func TestTelegram_GetUpdatesFlow(t *testing.T) {
+	first := true
+	ts := mockTelegramServer(func(w http.ResponseWriter, r *http.Request) {
+		if strings.Contains(r.URL.String(), "sendMessage") {
+			// respond normally to processUpdates attempt to send message back to user
+			_, _ = w.Write([]byte("{}"))
+			return
+		}
+		// responses to get updates calls to API
+		if first {
+			assert.Equal(t, "", r.URL.Query().Get("offset"))
+			first = false
+		} else {
+			assert.Equal(t, "1001", r.URL.Query().Get("offset"))
+		}
+		_, _ = w.Write([]byte(getUpdatesResp))
+	})
+	defer ts.Close()
+	tb, err := NewTelegram(TelegramParams{
+		AdminChannelID:    "remark_test",
+		Token:             "xxxsupersecretxxx",
+		UserNotifications: true,
+		apiPrefix:         ts.URL + "/",
+	})
+	assert.NoError(t, err)
+
+	// send request with no offset
+	upd, err := tb.getUpdates(context.Background())
+	assert.NoError(t, err)
+
+	assert.Len(t, upd.Result, 3)
+	assert.Equal(t, 1001, tb.updateOffset)
+	assert.Equal(t, "/start token", upd.Result[len(upd.Result)-1].Message.Text)
+
+	tb.AddToken("token", "user", "site", time.Now().Add(time.Minute))
+	_, _, err = tb.CheckToken("token", "user")
+	assert.Error(t, err)
+	tb.processUpdates(context.Background(), upd)
+	tgID, site, err := tb.CheckToken("token", "user")
+	assert.NoError(t, err)
+	assert.Equal(t, "313131313", tgID)
+	assert.Equal(t, "site", site)
+
+	// send request with offset
+	_, err = tb.getUpdates(context.Background())
+	assert.NoError(t, err)
+}
+
+func TestTelegram_ProcessUpdateFlow(t *testing.T) {
+	ts := mockTelegramServer(func(w http.ResponseWriter, r *http.Request) {
+		// respond normally to processUpdates attempt to send message back to user
+		_, _ = w.Write([]byte("{}"))
+	})
+	defer ts.Close()
+	tb, err := NewTelegram(TelegramParams{
+		AdminChannelID:    "remark_test",
+		Token:             "xxxsupersecretxxx",
+		UserNotifications: true,
+		apiPrefix:         ts.URL + "/",
+	})
+	assert.NoError(t, err)
+
+	tb.AddToken("token", "user", "site", time.Now().Add(time.Minute))
+	tb.AddToken("expired token", "user", "site", time.Now().Add(-time.Minute))
+	assert.Len(t, tb.requests.data, 2)
+	_, _, err = tb.CheckToken("token", "user")
+	assert.Error(t, err)
+	assert.NoError(t, tb.ProcessUpdate(context.Background(), getUpdatesResp))
+	assert.Len(t, tb.requests.data, 1, "expired token was cleaned up")
+	tgID, site, err := tb.CheckToken("token", "user")
+	assert.NoError(t, err)
+	assert.Len(t, tb.requests.data, 0, "token is deleted after successful check")
+	assert.Equal(t, "313131313", tgID)
+	assert.Equal(t, "site", site)
+
+	tb.AddToken("expired token", "user", "site", time.Now().Add(-time.Minute))
+	assert.Len(t, tb.requests.data, 1)
+	assert.EqualError(t, tb.ProcessUpdate(context.Background(), ""), "failed to decode provided telegram update: unexpected end of JSON input")
+	assert.Len(t, tb.requests.data, 0, "expired token should be cleaned up despite the error")
+}
+
+const sendMessageResp = `{
+  "ok": true,
+  "result": {
+     "message_id": 100,
+     "from": {
+        "id": 666666666,
+        "is_bot": true,
+        "first_name": "Test auth bot",
+        "username": "TestAuthBot"
+     },
+     "chat": {
+        "id": 313131313,
+        "first_name": "Joe",
+        "username": "joe123",
+        "type": "private"
+     },
+     "date": 1602430546,
+     "text": "123"
+  }
+}`
+
+func TestTelegram_SendText(t *testing.T) {
+	ts := mockTelegramServer(func(w http.ResponseWriter, r *http.Request) {
+		assert.Equal(t, "123", r.URL.Query().Get("chat_id"))
+		assert.Equal(t, "hello there", r.URL.Query().Get("text"))
+		_, _ = w.Write([]byte(sendMessageResp))
+	})
+	defer ts.Close()
+	tb, err := NewTelegram(TelegramParams{
+		AdminChannelID:    "remark_test",
+		Token:             "xxxsupersecretxxx",
+		UserNotifications: true,
+		apiPrefix:         ts.URL + "/",
+	})
+	assert.NoError(t, err)
+
+	err = tb.sendText(context.Background(), 123, "hello there")
+	assert.NoError(t, err)
+}
+
+const errorResp = `{"ok":false,"error_code":400,"description":"Very bad request"}`
+
+func TestTelegram_Error(t *testing.T) {
+	ts := mockTelegramServer(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusBadRequest)
+		_, _ = w.Write([]byte(errorResp))
+	})
+	defer ts.Close()
+	tb, err := NewTelegram(TelegramParams{
+		AdminChannelID:    "remark_test",
+		Token:             "xxxsupersecretxxx",
+		UserNotifications: true,
+		apiPrefix:         ts.URL + "/",
+	})
+	assert.NoError(t, err)
+
+	_, err = tb.getUpdates(context.Background())
+	assert.EqualError(t, err, "failed to fetch updates: unexpected telegram API status code 400, error: \"Very bad request\"")
+}
+
+func TestTelegram_TokenVerification(t *testing.T) {
+	ts := mockTelegramServer(func(w http.ResponseWriter, r *http.Request) {
+		if strings.Contains(r.URL.String(), "sendMessage") {
+			// respond normally to processUpdates attempt to send message back to user
+			_, _ = w.Write([]byte("{}"))
+			return
+		}
+		// responses to get updates calls to API
+		_, _ = w.Write([]byte(getUpdatesResp))
+	})
+	defer ts.Close()
+
+	tb, err := NewTelegram(TelegramParams{
+		AdminChannelID: "remark_test",
+		Token:          "good-token",
+		apiPrefix:      ts.URL + "/",
+	})
+	assert.NoError(t, err)
+	assert.NotNil(t, tb)
+	tb.AddToken("token", "user", "site", time.Now().Add(time.Minute))
+	assert.Len(t, tb.requests.data, 1)
+
+	// wrong token
+	tgID, site, err := tb.CheckToken("unknown token", "user")
+	assert.Empty(t, tgID)
+	assert.Empty(t, site)
+	assert.EqualError(t, err, "request is not found")
+
+	// right token and user, not verified yet
+	tgID, site, err = tb.CheckToken("token", "user")
+	assert.Empty(t, tgID)
+	assert.Empty(t, site)
+	assert.EqualError(t, err, "request is not verified yet")
+
+	// confirm request
+	authRequest, ok := tb.requests.data["token"]
+	assert.True(t, ok)
+	authRequest.confirmed = true
+	authRequest.telegramID = "telegramID"
+	tb.requests.data["token"] = authRequest
+
+	// wrong user
+	tgID, site, err = tb.CheckToken("token", "wrong user")
+	assert.Empty(t, tgID)
+	assert.Empty(t, site)
+	assert.EqualError(t, err, "user does not match original requester")
+
+	// successful check
+	tgID, site, err = tb.CheckToken("token", "user")
+	assert.NoError(t, err)
+	assert.Equal(t, "telegramID", tgID)
+	assert.Equal(t, "site", site)
+
+	// expired token
+	tb.AddToken("expired token", "user", "site", time.Now().Add(-time.Minute))
+	tgID, site, err = tb.CheckToken("expired token", "user")
+	assert.Empty(t, tgID)
+	assert.Empty(t, site)
+	assert.EqualError(t, err, "request expired")
+	assert.Len(t, tb.requests.data, 0)
+
+	// expired token, cleaned up by the cleanup
+	tb.apiPollInterval = time.Millisecond * 15
+	tb.expiredCleanupInterval = time.Millisecond * 10
+	ctx, cancel := context.WithCancel(context.Background())
+	go tb.Run(ctx)
+	assert.Eventually(t, func() bool {
+		return tb.ProcessUpdate(ctx, "").Error() == "Run goroutine should not be used with ProcessUpdate"
+	}, time.Millisecond*100, time.Millisecond*10, "ProcessUpdate should not work same time as Run")
+	tb.AddToken("expired token", "user", "site", time.Now().Add(-time.Minute))
+	tb.requests.RLock()
+	assert.Len(t, tb.requests.data, 1)
+	tb.requests.RUnlock()
+	time.Sleep(tb.expiredCleanupInterval * 2)
+	tb.requests.RLock()
+	assert.Len(t, tb.requests.data, 0)
+	tb.requests.RUnlock()
+	cancel()
+	// give enough time for Run() to finish
+	time.Sleep(tb.expiredCleanupInterval)
+}
+
+const getMeResp = `{"ok": true,
 				"result": {
 					"first_name": "comments_test",
 					"id": 707381019,
 					"is_bot": true,
 					"username": "remark42_test_bot"
 				}}`
-		_, _ = w.Write([]byte(s))
+
+func mockTelegramServer(h http.HandlerFunc) *httptest.Server {
+	if h != nil {
+		return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if strings.Contains(r.URL.String(), "getMe") {
+				_, _ = w.Write([]byte(getMeResp))
+				return
+			}
+			h(w, r)
+		}))
+	}
+	router := chi.NewRouter()
+	router.Get("/good-token/getMe", func(w http.ResponseWriter, r *http.Request) {
+		_, _ = w.Write([]byte(getMeResp))
 	})
-	router.Get("/bad-resp/getMe", func(w http.ResponseWriter, r *http.Request) {
-		s := `{"ok": false,
-				"result": {
-					"first_name": "comments_test",
-					"id": 707381019,
-					"is_bot": false,
-					"username": "remark42_test_bot"
-				}}`
-		_, _ = w.Write([]byte(s))
+	router.Get("/empty-json/getMe", func(w http.ResponseWriter, r *http.Request) {
+		_, _ = w.Write([]byte(`{}`))
 	})
 	router.Get("/non-json-resp/getMe", func(w http.ResponseWriter, r *http.Request) {
-		s := `"ok": false,
-				"result": {
-					"first_name": "comments_test",
-					"id": 707381019,
-					"is_bot": false,
-					"username": "remark42_test_bot"
-				`
-		_, _ = w.Write([]byte(s))
+		_, _ = w.Write([]byte(`not-a-json`))
 	})
 	router.Get("/404/getMe", func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(404)

backend/app/notify/testdata/bad.html.tmpl

@@ -0,0 +1 @@
+{{

backend/app/notify/testdata/msg.html.tmpl

@@ -0,0 +1,20 @@
+{{- if .ForAdmin}}
+New comment from {{.UserName}} on your site {{if .PostTitle}} to «{{.PostTitle}}»{{ end }}
+{{- else }}
+	New reply from {{.UserName}} on your comment{{if .PostTitle}} to «{{.PostTitle}}»{{ end }}
+{{- end }}
+{{- if .ParentCommentText}}
+	{{.ParentUserPicture}}
+	{{.ParentUserName}}
+	{{.ParentCommentDate.Format "02.01.2006 at 15:04"}}
+	Parent comment link: {{.ParentCommentLink}}
+	{{.ParentCommentText}}
+{{- end }}
+
+User: {{.UserName}}
+{{.CommentDate.Format "02.01.2006 at 15:04"}}
+Comment: {{.CommentText}}
+{{.Email}} {{if not .ForAdmin}} for {{.ParentUserName}}{{ end }}
+{{- if .UnsubscribeLink}}
+Unsubscribe link: {{.UnsubscribeLink}}
+{{- end }}

backend/app/notify/testdata/verification.html.tmpl

@@ -0,0 +1,7 @@
+Confirmation for {{.User}} on site {{.Site}}
+{{- if .SubscribeURL}}
+Subscribe url: {{.SubscribeURL}}{{.Token}}
+{{- end }}
+Token:{{.Token}}
+Sent to {{.Email}}
+

backend/app/notify/webhook.go

@@ -0,0 +1,113 @@
+package notify
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"text/template"
+
+	log "github.com/go-pkgz/lgr"
+	"github.com/pkg/errors"
+)
+
+const (
+	webhookDefaultTemplate = `{"text": "{{.Text}}"}`
+)
+
+// WebhookClient defines an interface of client for webhook
+type WebhookClient interface {
+	Do(*http.Request) (*http.Response, error)
+}
+
+// WebhookParams contain settings for webhook notifications
+type WebhookParams struct {
+	WebhookURL string
+	Template   string
+	Headers    []string
+}
+
+// Webhook implements notify.Destination for Webhook notifications
+type Webhook struct {
+	WebhookParams
+	webhookClient   WebhookClient
+	webhookTemplate *template.Template
+}
+
+// NewWebhook makes Webhook
+func NewWebhook(client WebhookClient, params WebhookParams) (*Webhook, error) {
+	res := &Webhook{WebhookParams: params}
+	if res.WebhookURL == "" {
+		return nil, errors.New("webhook URL is required for webhook notifications")
+	}
+
+	if res.Template == "" {
+		res.Template = webhookDefaultTemplate
+	}
+
+	payloadTmpl, err := template.New("webhook").Parse(res.Template)
+	if err != nil {
+		return nil, errors.Wrap(err, "unable to parse webhook template")
+	}
+
+	res.webhookClient = client
+	res.webhookTemplate = payloadTmpl
+
+	log.Printf("[DEBUG] create new webhook notifier for %s", res.WebhookURL)
+
+	return res, nil
+}
+
+// Send sends Webhook notification
+func (t *Webhook) Send(ctx context.Context, req Request) error {
+	var payload bytes.Buffer
+	err := t.webhookTemplate.Execute(&payload, req.Comment)
+	if err != nil {
+		return errors.Wrap(err, "unable to compile webhook template")
+	}
+
+	httpReq, err := http.NewRequestWithContext(ctx, "POST", t.WebhookURL, &payload)
+	if err != nil {
+		return errors.Wrap(err, "unable to create webhook request")
+	}
+
+	for _, h := range t.Headers {
+		elems := strings.Split(h, ":")
+		if len(elems) != 2 {
+			continue
+		}
+		httpReq.Header.Set(strings.TrimSpace(elems[0]), strings.TrimSpace(elems[1]))
+	}
+
+	resp, err := t.webhookClient.Do(httpReq)
+	if err != nil {
+		return errors.Wrap(err, "webhook request failed")
+	}
+
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		errMsg := fmt.Sprintf("webhook request failed with non-OK status code: %d", resp.StatusCode)
+		respBody, e := io.ReadAll(resp.Body)
+		if e != nil {
+			return fmt.Errorf(errMsg)
+		}
+		return fmt.Errorf("%s, body: %s", errMsg, respBody)
+	}
+
+	log.Printf("[DEBUG] send webhook notification, comment id %s", req.Comment.ID)
+
+	return nil
+}
+
+// SendVerification is not implemented for Webhook
+func (t *Webhook) SendVerification(_ context.Context, _ VerificationRequest) error {
+	return nil
+}
+
+// String describes the webhook instance
+func (t *Webhook) String() string {
+	return fmt.Sprintf("webhook notification to %s", t.WebhookURL)
+}

backend/app/notify/webhook_test.go

@@ -0,0 +1,160 @@
+package notify
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"io"
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/umputun/remark42/backend/app/store"
+)
+
+type funcWebhookClient func(*http.Request) (*http.Response, error)
+
+func (c funcWebhookClient) Do(r *http.Request) (*http.Response, error) {
+	return c(r)
+}
+
+var okWebhookClient = funcWebhookClient(func(*http.Request) (*http.Response, error) {
+	return &http.Response{
+		StatusCode: http.StatusOK,
+		Body:       io.NopCloser(bytes.NewBufferString("ok")),
+	}, nil
+})
+
+type errReader struct {
+}
+
+func (errReader) Read(p []byte) (n int, err error) {
+	return 0, errors.New("test error")
+}
+
+func TestWebhook_NewWebhook(t *testing.T) {
+
+	wh, err := NewWebhook(okWebhookClient, WebhookParams{
+		WebhookURL: "https://example.org/webhook",
+		Headers:    []string{"Authorization:Basic AXVubzpwQDU1dzByYM=="},
+	})
+	assert.NoError(t, err)
+	assert.NotNil(t, wh)
+
+	assert.Equal(t, "https://example.org/webhook", wh.WebhookURL)
+	assert.Equal(t, []string{"Authorization:Basic AXVubzpwQDU1dzByYM=="}, wh.Headers)
+	assert.Equal(t, `{"text": "{{.Text}}"}`, wh.Template)
+
+	wh, err = NewWebhook(okWebhookClient, WebhookParams{
+		WebhookURL: "https://example.org/webhook",
+		Headers:    []string{"Authorization:Basic AXVubzpwQDU1dzByYM=="},
+		Template:   "{{.Text}}",
+	})
+	assert.NoError(t, err)
+	assert.NotNil(t, wh)
+	assert.Equal(t, "{{.Text}}", wh.Template)
+
+	wh, err = NewWebhook(okWebhookClient, WebhookParams{})
+	assert.Nil(t, wh)
+	assert.Error(t, err)
+	assert.Equal(t, "webhook URL is required for webhook notifications", err.Error())
+
+	wh, err = NewWebhook(okWebhookClient, WebhookParams{WebhookURL: "https://example.org/webhook", Template: "{{.Text"})
+	assert.Nil(t, wh)
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "unable to parse webhook template")
+}
+
+func TestWebhook_Send(t *testing.T) {
+
+	wh, err := NewWebhook(funcWebhookClient(func(r *http.Request) (*http.Response, error) {
+		assert.Len(t, r.Header, 1)
+		assert.Equal(t, r.Header.Get("Content-Type"), "application/json,text/plain")
+
+		return &http.Response{
+			StatusCode: http.StatusOK,
+			Body:       io.NopCloser(bytes.NewBufferString("")),
+		}, nil
+	}), WebhookParams{
+		WebhookURL: "https://example.org/webhook",
+		Headers:    []string{"Content-Type:application/json,text/plain", ""},
+	})
+	assert.NoError(t, err)
+	assert.NotNil(t, wh)
+
+	c := store.Comment{Text: "some text", ParentID: "1", ID: "999"}
+	c.User.Name = "from"
+
+	err = wh.Send(context.TODO(), Request{Comment: c})
+	assert.NoError(t, err)
+
+	wh, err = NewWebhook(okWebhookClient, WebhookParams{
+		WebhookURL: "https://example.org/webhook",
+		Template:   "{{.InvalidProperty}}",
+	})
+	assert.NoError(t, err)
+	err = wh.Send(context.TODO(), Request{Comment: c})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "webhook template")
+
+	wh, err = NewWebhook(okWebhookClient, WebhookParams{WebhookURL: "https://example.org/webhook"})
+	assert.NoError(t, err)
+	err = wh.Send(nil, Request{Comment: c}) // nolint
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "unable to create webhook request")
+
+	wh, err = NewWebhook(funcWebhookClient(func(*http.Request) (*http.Response, error) {
+		return nil, errors.New("request failed")
+	}), WebhookParams{WebhookURL: "https://not-existing-url.net"})
+	assert.NoError(t, err)
+	err = wh.Send(context.TODO(), Request{Comment: c})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "webhook request failed")
+
+	wh, err = NewWebhook(funcWebhookClient(func(*http.Request) (*http.Response, error) {
+		return &http.Response{
+			StatusCode: http.StatusNotFound,
+			Body:       io.NopCloser(bytes.NewBufferString("not found")),
+		}, nil
+	}), WebhookParams{
+		WebhookURL: "http:/example.org/invalid-url",
+	})
+	assert.NoError(t, err)
+	err = wh.Send(context.TODO(), Request{Comment: c})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "non-OK status code: 404, body: not found")
+
+	wh, err = NewWebhook(funcWebhookClient(func(*http.Request) (*http.Response, error) {
+		return &http.Response{
+			StatusCode: http.StatusNotFound,
+			Body:       io.NopCloser(errReader{}),
+		}, nil
+	}), WebhookParams{
+		WebhookURL: "http:/example.org/invalid-url",
+	})
+	assert.NoError(t, err)
+	err = wh.Send(context.TODO(), Request{Comment: c})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "non-OK status code: 404")
+	assert.NotContains(t, err.Error(), "body")
+}
+
+func TestWebhook_SendVerification(t *testing.T) {
+	wh, err := NewWebhook(okWebhookClient, WebhookParams{WebhookURL: "https://example.org/webhook"})
+	assert.NoError(t, err)
+	assert.NotNil(t, wh)
+
+	err = wh.SendVerification(context.TODO(), VerificationRequest{})
+	assert.NoError(t, err)
+}
+
+func TestWebhook_String(t *testing.T) {
+	wh, err := NewWebhook(okWebhookClient, WebhookParams{WebhookURL: "https://example.org/webhook"})
+	assert.NoError(t, err)
+	assert.NotNil(t, wh)
+
+	str := wh.String()
+	assert.Equal(t, "webhook notification to https://example.org/webhook", str)
+}

backend/app/providers/telegram.go

@@ -0,0 +1,72 @@
+package providers
+
+// Both Telegram auth and notifications need to receive messages received by Telegram bot in the loop,
+// and below is the implementation of such loop which dispatched received events to both receivers,
+// so that they could work at the same time.
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"time"
+
+	log "github.com/go-pkgz/lgr"
+
+	"github.com/umputun/remark42/backend/app/notify"
+)
+
+type tgRequester interface {
+	Request(ctx context.Context, method string, b []byte, data interface{}) error
+}
+
+// TGUpdatesReceiver used to dispatch telegram updates to multiple receivers
+type TGUpdatesReceiver interface {
+	fmt.Stringer
+	ProcessUpdate(ctx context.Context, textUpdate string) error
+}
+
+// DispatchTelegramUpdates dispatches telegram updates to provided list of receivers
+// Blocks caller
+func DispatchTelegramUpdates(ctx context.Context, requester tgRequester, receivers []TGUpdatesReceiver, period time.Duration) {
+	// Identifier of the first update to be requested.
+	// Should be equal to LastSeenUpdateID + 1
+	// See https://core.telegram.org/bots/api#getupdates
+	var updateOffset int
+
+	processUpdatedTicker := time.NewTicker(period)
+	for {
+		select {
+		case <-ctx.Done():
+			processUpdatedTicker.Stop()
+			return
+		case <-processUpdatedTicker.C:
+			url := `getUpdates?allowed_updates=["message"]`
+			if updateOffset != 0 {
+				url += fmt.Sprintf("&offset=%d", updateOffset)
+			}
+
+			var update notify.TelegramUpdate
+
+			err := requester.Request(ctx, url, nil, &update)
+			if err != nil {
+				log.Printf("[WARN] failed to fetch updates: %v", err)
+				continue
+			}
+
+			for _, u := range update.Result {
+				if u.UpdateID >= updateOffset {
+					updateOffset = u.UpdateID + 1
+				}
+			}
+
+			if raw, err := json.Marshal(update); err == nil {
+				for _, r := range receivers {
+					e := r.ProcessUpdate(ctx, string(raw))
+					if e != nil {
+						log.Printf("[ERROR] failure from destination %s on processing telegram update %v", r, e)
+					}
+				}
+			}
+		}
+	}
+}

backend/app/providers/telegram_test.go

@@ -0,0 +1,72 @@
+package providers
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/umputun/remark42/backend/app/notify"
+)
+
+func TestDispatchTelegramUpdates(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	poolPeriod := time.Millisecond * 100
+	go DispatchTelegramUpdates(ctx, &mockTGRequester{t: t}, []TGUpdatesReceiver{&mockTGUpdatesReceiver{t: t}}, poolPeriod)
+	time.Sleep(poolPeriod * 3)
+	cancel()
+	time.Sleep(poolPeriod)
+}
+
+const getUpdatesResp = `{
+  "ok": true,
+  "result": [
+     {
+        "update_id": 998,
+        "message": {
+           "chat": {
+              "type": "group"
+           }
+        }
+     }
+]
+}`
+
+type mockTGRequester struct {
+	hit int
+	t   *testing.T
+}
+
+func (m *mockTGRequester) Request(_ context.Context, _ string, _ []byte, data interface{}) error {
+	if m.hit < 2 {
+		m.hit++
+		assert.NoError(m.t, json.Unmarshal([]byte(getUpdatesResp), data))
+		return nil
+	}
+	return errors.New("test error")
+}
+
+type mockTGUpdatesReceiver struct {
+	t   *testing.T
+	hit int
+}
+
+func (m *mockTGUpdatesReceiver) String() string {
+	return "mock updater"
+}
+
+func (m *mockTGUpdatesReceiver) ProcessUpdate(_ context.Context, textUpdate string) error {
+	var result notify.TelegramUpdate
+	err := json.Unmarshal([]byte(textUpdate), &result)
+	assert.NoError(m.t, err)
+	if m.hit < 2 {
+		assert.NotNil(m.t, result.Result)
+		m.hit++
+		return nil
+	}
+	assert.Nil(m.t, result.Result)
+	return errors.New("test error")
+}

backend/app/rest/api/admin.go

@@ -6,27 +6,42 @@ import (
 	"path"
 	"time"
 
-	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
 	"github.com/go-pkgz/auth"
+	cache "github.com/go-pkgz/lcw"
 	log "github.com/go-pkgz/lgr"
 	R "github.com/go-pkgz/rest"
-	"github.com/go-pkgz/rest/cache"
 
-	"github.com/umputun/remark/backend/app/rest"
-	"github.com/umputun/remark/backend/app/store"
-	"github.com/umputun/remark/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/rest"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/engine"
 )
 
 // admin provides router for all requests available for admin users only
 type admin struct {
-	dataService   *service.DataStore
-	cache         cache.LoadingCache
+	dataService   adminStore
+	cache         LoadingCache
 	authenticator *auth.Service
 	readOnlyAge   int
 	migrator      *Migrator
 }
 
+type adminStore interface {
+	Delete(locator store.Locator, commentID string, mode store.DeleteMode) error
+	DeleteUser(siteID string, userID string, mode store.DeleteMode) error
+	DeleteUserDetail(siteID string, userID string, detail engine.UserDetail) error
+	User(siteID, userID string, limit, skip int, user store.User) ([]store.Comment, error)
+	IsBlocked(siteID string, userID string) bool
+	SetBlock(siteID string, userID string, status bool, ttl time.Duration) error
+	BlockedUsers(siteID string) ([]store.BlockedUser, error)
+	Info(locator store.Locator, readonlyAge int) (store.PostInfo, error)
+	SetTitle(locator store.Locator, commentID string) (comment store.Comment, err error)
+	SetVerified(siteID string, userID string, status bool) error
+	SetReadOnly(locator store.Locator, status bool) error
+	SetPin(locator store.Locator, commentID string, status bool) error
+}
+
 // DELETE /comment/{id}?site=siteID&url=post-url - removes comment
 func (a *admin) deleteCommentCtrl(w http.ResponseWriter, r *http.Request) {
 
@@ -51,7 +66,7 @@ func (a *admin) deleteUserCtrl(w http.ResponseWriter, r *http.Request) {
 	siteID := r.URL.Query().Get("site")
 	log.Printf("[INFO] delete all user comments for %s, site %s", userID, siteID)
 
-	if err := a.dataService.DeleteUser(siteID, userID); err != nil {
+	if err := a.dataService.DeleteUser(siteID, userID, store.HardDelete); err != nil {
 		rest.SendErrorJSON(w, r, http.StatusInternalServerError, err, "can't delete user", rest.ErrInternal)
 		return
 	}
@@ -67,7 +82,7 @@ func (a *admin) getUserInfoCtrl(w http.ResponseWriter, r *http.Request) {
 	siteID := r.URL.Query().Get("site")
 	log.Printf("[INFO] get user info for %s, site %s", userID, siteID)
 
-	ucomments, err := a.dataService.User(siteID, userID, 1, 0)
+	ucomments, err := a.dataService.User(siteID, userID, 1, 0, rest.GetUserOrEmpty(r))
 	if err != nil || len(ucomments) == 0 {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't get user info", rest.ErrInternal)
 		return
@@ -76,7 +91,7 @@ func (a *admin) getUserInfoCtrl(w http.ResponseWriter, r *http.Request) {
 	render.JSON(w, r, ucomments[0].User)
 }
 
-// GET /deleteme?token=jwt - delete all user comments by user's request. Gets info about deleted used from provided token
+// GET /deleteme?token=jwt - delete all user comments and details by user's request. Gets info about deleted used from provided token
 // request made GET to allow direct click from the email sent by user
 func (a *admin) deleteMeRequestCtrl(w http.ResponseWriter, r *http.Request) {
 
@@ -96,7 +111,13 @@ func (a *admin) deleteMeRequestCtrl(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if err = a.dataService.DeleteUser(claims.Audience, claims.User.ID); err != nil {
+	if err = a.dataService.DeleteUserDetail(claims.Audience, claims.User.ID, engine.AllUserDetails); err != nil {
+		code := parseError(err, rest.ErrInternal)
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't delete user details for user", code)
+		return
+	}
+
+	if err = a.dataService.DeleteUser(claims.Audience, claims.User.ID, store.HardDelete); err != nil {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't delete user", rest.ErrNoAccess)
 		return
 	}
@@ -131,6 +152,13 @@ func (a *admin) setBlockCtrl(w http.ResponseWriter, r *http.Request) {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't set blocking status", rest.ErrActionRejected)
 		return
 	}
+
+	// delete comments for permanently blocked user.
+	if blockStatus && ttl == time.Duration(0) {
+		if err := a.dataService.DeleteUser(siteID, userID, store.SoftDelete); err != nil {
+			log.Printf("[WARN] can't delete comments for blocked user %s on site %s, %v", userID, siteID, err)
+		}
+	}
 	a.cache.Flush(cache.Flusher(siteID).Scopes(userID, siteID, lastCommentsScope))
 	render.JSON(w, r, R.JSON{"user_id": userID, "site_id": siteID, "block": blockStatus})
 }
@@ -138,7 +166,7 @@ func (a *admin) setBlockCtrl(w http.ResponseWriter, r *http.Request) {
 // GET /blocked?site=siteID - list blocked users
 func (a *admin) blockedUsersCtrl(w http.ResponseWriter, r *http.Request) {
 	siteID := r.URL.Query().Get("site")
-	users, err := a.dataService.Blocked(siteID)
+	users, err := a.dataService.BlockedUsers(siteID)
 	if err != nil {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't get blocked users", rest.ErrSiteNotFound)
 		return
@@ -218,42 +246,3 @@ func (a *admin) setPinCtrl(w http.ResponseWriter, r *http.Request) {
 	a.cache.Flush(cache.Flusher(locator.SiteID).Scopes(locator.URL))
 	render.JSON(w, r, R.JSON{"id": commentID, "locator": locator, "pin": pinStatus})
 }
-
-func (a *admin) checkBlocked(siteID string, user store.User) bool {
-	return a.dataService.IsBlocked(siteID, user.ID)
-}
-
-// post-processes comments, hides text of all comments for blocked users,
-// resets score and votes too. Also hides sensitive info for non-admin users
-func (a *admin) alterComments(comments []store.Comment, r *http.Request) (res []store.Comment) {
-	res = make([]store.Comment, len(comments))
-
-	user, err := rest.GetUserInfo(r)
-	isAdmin := err == nil && user.Admin
-
-	for i, c := range comments {
-
-		blocked := a.dataService.IsBlocked(c.Locator.SiteID, c.User.ID)
-		// process blocked users
-		if blocked {
-			if !isAdmin { // reset comment to deleted for non-admins
-				c.SetDeleted(store.SoftDelete)
-			}
-			c.User.Blocked = true
-			c.Deleted = true
-		}
-
-		// set verified status retroactively
-		if !blocked {
-			c.User.Verified = a.dataService.IsVerified(c.Locator.SiteID, c.User.ID)
-		}
-
-		// hide info from non-admins
-		if !isAdmin {
-			c.User.IP = ""
-		}
-
-		res[i] = c
-	}
-	return res
-}

backend/app/rest/api/admin_test.go

@@ -5,7 +5,7 @@ import (
 	"compress/gzip"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"os"
@@ -13,16 +13,15 @@ import (
 	"testing"
 	"time"
 
-	jwt "github.com/dgrijalva/jwt-go"
 	"github.com/go-pkgz/auth/token"
+	cache "github.com/go-pkgz/lcw"
 	R "github.com/go-pkgz/rest"
-	"github.com/go-pkgz/rest/cache"
-
+	"github.com/golang-jwt/jwt"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
-	"github.com/umputun/remark/backend/app/store"
-	"github.com/umputun/remark/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/service"
 )
 
 func TestAdmin_Delete(t *testing.T) {
@@ -30,79 +29,82 @@ func TestAdmin_Delete(t *testing.T) {
 	defer teardown()
 
 	c1 := store.Comment{Text: "test test #1", User: store.User{ID: "id", Name: "name"},
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}}
 	c2 := store.Comment{Text: "test test #2", User: store.User{ID: "id", Name: "name"}, ParentID: "p1",
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}}
 
 	id1 := addComment(t, c1, ts)
 	addComment(t, c2, ts)
 
 	// check last comments
-	res, code := get(t, ts.URL+"/api/v1/last/2?site=radio-t")
+	res, code := get(t, ts.URL+"/api/v1/last/2?site=remark42")
 	assert.Equal(t, 200, code)
 	comments := []store.Comment{}
 	err := json.Unmarshal([]byte(res), &comments)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 2, len(comments), "should have 2 comments")
 
 	// check multi count
-	resp, err := post(t, ts.URL+"/api/v1/counts?site=radio-t", `["https://radio-t.com/blah","https://radio-t.com/blah2"]`)
-	assert.Nil(t, err)
+	resp, err := post(t, ts.URL+"/api/v1/counts?site=remark42", `["https://radio-t.com/blah","https://radio-t.com/blah2"]`)
+	require.NoError(t, err)
 	assert.Equal(t, http.StatusOK, resp.StatusCode)
-	bb, err := ioutil.ReadAll(resp.Body)
-	assert.Nil(t, err)
+	bb, err := io.ReadAll(resp.Body)
+	assert.NoError(t, resp.Body.Close())
+	assert.NoError(t, err)
 	j := []store.PostInfo{}
 	err = json.Unmarshal(bb, &j)
-	assert.Nil(t, err)
-	assert.Equal(t, []store.PostInfo([]store.PostInfo{{URL: "https://radio-t.com/blah", Count: 2},
-		{URL: "https://radio-t.com/blah2", Count: 0}}), j)
+	assert.NoError(t, err)
+	assert.Equal(t, []store.PostInfo{{URL: "https://radio-t.com/blah", Count: 2},
+		{URL: "https://radio-t.com/blah2", Count: 0}}, j)
 
 	// delete a comment
 	req, err := http.NewRequest(http.MethodDelete,
-		fmt.Sprintf("%s/api/v1/admin/comment/%s?site=radio-t&url=https://radio-t.com/blah", ts.URL, id1), nil)
-	assert.Nil(t, err)
+		fmt.Sprintf("%s/api/v1/admin/comment/%s?site=remark42&url=https://radio-t.com/blah", ts.URL, id1), http.NoBody)
+	require.NoError(t, err)
 	requireAdminOnly(t, req)
 	resp, err = sendReq(t, req, adminUmputunToken)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
 	assert.Equal(t, 200, resp.StatusCode)
 
-	body, code := getWithDevAuth(t, fmt.Sprintf("%s/api/v1/id/%s?site=radio-t&url=https://radio-t.com/blah", ts.URL, id1))
+	body, code := getWithDevAuth(t, fmt.Sprintf("%s/api/v1/id/%s?site=remark42&url=https://radio-t.com/blah", ts.URL, id1))
 	assert.Equal(t, 200, code)
 	cr := store.Comment{}
 	err = json.Unmarshal([]byte(body), &cr)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, "", cr.Text)
 	assert.True(t, cr.Deleted)
 
 	time.Sleep(250 * time.Millisecond)
 	// check last comments updated
-	res, code = get(t, ts.URL+"/api/v1/last/2?site=radio-t")
+	res, code = get(t, ts.URL+"/api/v1/last/2?site=remark42")
 	assert.Equal(t, 200, code)
 	comments = []store.Comment{}
 	err = json.Unmarshal([]byte(res), &comments)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 1, len(comments), "should have 1 comments")
 
 	// check count updated
-	res, code = get(t, ts.URL+"/api/v1/count?site=radio-t&url=https://radio-t.com/blah")
+	res, code = get(t, ts.URL+"/api/v1/count?site=remark42&url=https://radio-t.com/blah")
 	assert.Equal(t, 200, code)
 	b := map[string]interface{}{}
 	err = json.Unmarshal([]byte(res), &b)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	t.Logf("%#v", b)
 	assert.Equal(t, 1.0, b["count"], "should report 1 comments")
 
 	// check multi count updated
-	resp, err = post(t, ts.URL+"/api/v1/counts?site=radio-t", `["https://radio-t.com/blah","https://radio-t.com/blah2"]`)
-	assert.Nil(t, err)
+	resp, err = post(t, ts.URL+"/api/v1/counts?site=remark42", `["https://radio-t.com/blah","https://radio-t.com/blah2"]`)
+	assert.NoError(t, err)
 	assert.Equal(t, http.StatusOK, resp.StatusCode)
-	bb, err = ioutil.ReadAll(resp.Body)
-	assert.Nil(t, err)
+	bb, err = io.ReadAll(resp.Body)
+	assert.NoError(t, resp.Body.Close())
+	assert.NoError(t, err)
 	j = []store.PostInfo{}
 	err = json.Unmarshal(bb, &j)
-	assert.Nil(t, err)
-	assert.Equal(t, []store.PostInfo([]store.PostInfo{{URL: "https://radio-t.com/blah", Count: 1},
-		{URL: "https://radio-t.com/blah2", Count: 0}}), j)
+	assert.NoError(t, err)
+	assert.Equal(t, []store.PostInfo{{URL: "https://radio-t.com/blah", Count: 1},
+		{URL: "https://radio-t.com/blah2", Count: 0}}, j)
 }
 
 func TestAdmin_Title(t *testing.T) {
@@ -126,26 +128,27 @@ func TestAdmin_Title(t *testing.T) {
 	defer tss.Close()
 
 	c1 := store.Comment{Text: "test test #1", User: store.User{ID: "id", Name: "name"},
-		Locator: store.Locator{SiteID: "radio-t", URL: tss.URL + "/post1"}}
+		Locator: store.Locator{SiteID: "remark42", URL: tss.URL + "/post1"}}
 	c2 := store.Comment{Text: "test test #2", User: store.User{ID: "id", Name: "name"}, ParentID: "p1",
-		Locator: store.Locator{SiteID: "radio-t", URL: tss.URL + "/post2"}}
+		Locator: store.Locator{SiteID: "remark42", URL: tss.URL + "/post2"}}
 
 	id1 := addComment(t, c1, ts)
 	addComment(t, c2, ts)
 
 	req, err := http.NewRequest(http.MethodPut,
-		fmt.Sprintf("%s/api/v1/admin/title/%s?site=radio-t&url=%s/post1", ts.URL, id1, tss.URL), nil)
-	assert.Nil(t, err)
+		fmt.Sprintf("%s/api/v1/admin/title/%s?site=remark42&url=%s/post1", ts.URL, id1, tss.URL), http.NoBody)
+	assert.NoError(t, err)
 	requireAdminOnly(t, req)
 	resp, err := sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 200, resp.StatusCode)
 
-	body, code := get(t, fmt.Sprintf("%s/api/v1/id/%s?site=radio-t&url=%s/post1", ts.URL, id1, tss.URL))
+	body, code := get(t, fmt.Sprintf("%s/api/v1/id/%s?site=remark42&url=%s/post1", ts.URL, id1, tss.URL))
 	require.Equal(t, 200, code)
 	cr := store.Comment{}
 	err = json.Unmarshal([]byte(body), &cr)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, "post1 blah 123", cr.PostTitle)
 }
 
@@ -154,11 +157,11 @@ func TestAdmin_DeleteUser(t *testing.T) {
 	defer teardown()
 
 	c1 := store.Comment{Text: "test test #1", Orig: "o test test #1", User: store.User{ID: "id1", Name: "name"},
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}}
 	c2 := store.Comment{Text: "test test #2", Orig: "o test test #2", User: store.User{ID: "id2", Name: "name"}, ParentID: "p1",
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}}
 	c3 := store.Comment{Text: "test test #3", Orig: "o test test #3", User: store.User{ID: "id2", Name: "name"}, ParentID: "",
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}}
 
 	// write comments directly to store to keep user id
 	id1, err := srv.DataService.Create(c1)
@@ -168,20 +171,21 @@ func TestAdmin_DeleteUser(t *testing.T) {
 	_, err = srv.DataService.Create(c3)
 	assert.NoError(t, err)
 
-	req, err := http.NewRequest(http.MethodDelete, fmt.Sprintf("%s/api/v1/admin/user/%s?site=radio-t", ts.URL, "id2"), nil)
-	assert.Nil(t, err)
+	req, err := http.NewRequest(http.MethodDelete, fmt.Sprintf("%s/api/v1/admin/user/%s?site=remark42", ts.URL, "id2"), http.NoBody)
+	assert.NoError(t, err)
 	requireAdminOnly(t, req)
 	resp, err := sendReq(t, req, adminUmputunToken)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 200, resp.StatusCode)
 
 	// all 3 comments here, but for id2 they deleted
-	res, code := get(t, ts.URL+"/api/v1/find?site=radio-t&url=https://radio-t.com/blah&sort=+time")
+	res, code := get(t, ts.URL+"/api/v1/find?site=remark42&url=https://radio-t.com/blah&sort=+time")
 	assert.Equal(t, 200, code)
 	cmntWithInfo := commentsWithInfo{}
 	err = json.Unmarshal([]byte(res), &cmntWithInfo)
-	assert.Nil(t, err)
-	assert.Equal(t, 3, len(cmntWithInfo.Comments), "should have 3 comment")
+	assert.NoError(t, err)
+	require.Equal(t, 3, len(cmntWithInfo.Comments), "should have 3 comment")
 
 	// id1 comment untouched
 	assert.Equal(t, id1, cmntWithInfo.Comments[0].ID)
@@ -206,9 +210,9 @@ func TestAdmin_Pin(t *testing.T) {
 	defer teardown()
 
 	c1 := store.Comment{Text: "test test #1",
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}}
 	c2 := store.Comment{Text: "test test #2", ParentID: "p1",
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}}
 
 	id1 := addComment(t, c1, ts)
 	addComment(t, c2, ts)
@@ -216,32 +220,33 @@ func TestAdmin_Pin(t *testing.T) {
 	pin := func(val int) int {
 		client := http.Client{}
 		req, err := http.NewRequest(http.MethodPut,
-			fmt.Sprintf("%s/api/v1/admin/pin/%s?site=radio-t&url=https://radio-t.com/blah&pin=%d", ts.URL, id1, val), nil)
-		assert.Nil(t, err)
+			fmt.Sprintf("%s/api/v1/admin/pin/%s?site=remark42&url=https://radio-t.com/blah&pin=%d", ts.URL, id1, val), http.NoBody)
+		assert.NoError(t, err)
 		requireAdminOnly(t, req)
 		req.SetBasicAuth("admin", "password")
 		resp, err := client.Do(req)
-		assert.Nil(t, err)
+		assert.NoError(t, err)
+		assert.NoError(t, resp.Body.Close())
 		return resp.StatusCode
 	}
 
 	code := pin(1)
 	assert.Equal(t, 200, code)
 
-	body, code := get(t, fmt.Sprintf("%s/api/v1/id/%s?site=radio-t&url=https://radio-t.com/blah", ts.URL, id1))
+	body, code := get(t, fmt.Sprintf("%s/api/v1/id/%s?site=remark42&url=https://radio-t.com/blah", ts.URL, id1))
 	assert.Equal(t, 200, code)
 	cr := store.Comment{}
 	err := json.Unmarshal([]byte(body), &cr)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.True(t, cr.Pin)
 
 	code = pin(-1)
 	assert.Equal(t, 200, code)
-	body, code = get(t, fmt.Sprintf("%s/api/v1/id/%s?site=radio-t&url=https://radio-t.com/blah", ts.URL, id1))
+	body, code = get(t, fmt.Sprintf("%s/api/v1/id/%s?site=remark42&url=https://radio-t.com/blah", ts.URL, id1))
 	assert.Equal(t, 200, code)
 	cr = store.Comment{}
 	err = json.Unmarshal([]byte(body), &cr)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.False(t, cr.Pin)
 }
 
@@ -249,191 +254,245 @@ func TestAdmin_Block(t *testing.T) {
 	ts, srv, teardown := startupT(t)
 	defer teardown()
 
-	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "radio-t",
-		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user1 name", ID: "user1"}}
-	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "radio-t",
-		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user2", ID: "user2"}}
+	makeTwoComments := func() {
+		c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "remark42",
+			URL: "https://radio-t.com/blah"}, User: store.User{Name: "user1 name", ID: "user1"}}
+		c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "remark42",
+			URL: "https://radio-t.com/blah"}, User: store.User{Name: "user2", ID: "user2"}}
 
-	_, err := srv.DataService.Create(c1)
-	assert.Nil(t, err)
-	_, err = srv.DataService.Create(c2)
-	assert.Nil(t, err)
+		_, err := srv.DataService.Create(c1)
+		require.NoError(t, err)
+		_, err = srv.DataService.Create(c2)
+		require.NoError(t, err)
+	}
 
 	block := func(val int, ttl string) (code int, body []byte) {
-		url := fmt.Sprintf("%s/api/v1/admin/user/%s?site=radio-t&block=%d", ts.URL, "user1", val)
+		url := fmt.Sprintf("%s/api/v1/admin/user/%s?site=remark42&block=%d", ts.URL, "user1", val)
 		if ttl != "" {
 			url = url + "&ttl=" + ttl
 		}
-		req, e := http.NewRequest(http.MethodPut, url, nil)
-		assert.Nil(t, e)
+		req, err := http.NewRequest(http.MethodPut, url, http.NoBody)
+		assert.NoError(t, err)
 		requireAdminOnly(t, req)
-		resp, e := sendReq(t, req, adminUmputunToken)
-		require.Nil(t, e)
-		body, e = ioutil.ReadAll(resp.Body)
-		assert.Nil(t, e)
-		require.Nil(t, resp.Body.Close())
+		resp, err := sendReq(t, req, adminUmputunToken)
+		require.NoError(t, err)
+		body, err = io.ReadAll(resp.Body)
+		assert.NoError(t, err)
+		require.NoError(t, resp.Body.Close())
 		return resp.StatusCode, body
 	}
 
+	makeTwoComments()
+
 	// block permanently
 	code, body := block(1, "")
 	require.Equal(t, 200, code)
 	j := R.JSON{}
-	err = json.Unmarshal(body, &j)
-	assert.Nil(t, err)
+	err := json.Unmarshal(body, &j)
+	assert.NoError(t, err)
 	assert.Equal(t, "user1", j["user_id"])
 	assert.Equal(t, true, j["block"])
-	assert.Equal(t, "radio-t", j["site_id"])
+	assert.Equal(t, "remark42", j["site_id"])
 
-	res, code := get(t, ts.URL+"/api/v1/find?site=radio-t&url=https://radio-t.com/blah&sort=+time")
+	assert.True(t, srv.adminRest.dataService.IsBlocked("remark42", "user1"))
+	assert.False(t, srv.adminRest.dataService.IsBlocked("remark42", "user2"))
+
+	// get last to confirm one comment deleted
+	bodyStr, code := get(t, ts.URL+"/api/v1/last/10?site=remark42")
+	assert.Equal(t, 200, code)
+	pi := []store.PostInfo{}
+	assert.NoError(t, json.Unmarshal([]byte(bodyStr), &pi))
+	assert.Equal(t, 1, len(pi), "last status updated, one comment left")
+
+	// check if count call has one comment left
+	resp, err := post(t, ts.URL+"/api/v1/counts?site=remark42", `["https://radio-t.com/blah"]`)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusOK, resp.StatusCode)
+	body, err = io.ReadAll(resp.Body)
+	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
+	pi = []store.PostInfo{}
+	err = json.Unmarshal(body, &pi)
+	assert.NoError(t, err)
+	assert.Equal(t, []store.PostInfo{{URL: "https://radio-t.com/blah", Count: 1}}, pi)
+
+	res, code := get(t, ts.URL+"/api/v1/find?site=remark42&url=https://radio-t.com/blah&sort=+time")
 	assert.Equal(t, 200, code)
 	comments := commentsWithInfo{}
 	err = json.Unmarshal([]byte(res), &comments)
-	assert.Nil(t, err)
-	assert.Equal(t, 2, len(comments.Comments), "should have 2 comments")
-	assert.Equal(t, "", comments.Comments[0].Text)
-	assert.True(t, comments.Comments[0].Deleted)
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(comments.Comments), "should have 2 comments")
+	assert.Equal(t, "", comments.Comments[0].Text, "permanent block clear comment")
+	assert.True(t, comments.Comments[0].Deleted, "permanent block set deleted comment's status")
 
+	// unblock
 	code, body = block(-1, "")
 	require.Equal(t, 200, code)
 	err = json.Unmarshal(body, &j)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, false, j["block"])
 
 	// block with ttl
+	makeTwoComments()
 	code, _ = block(1, "50ms")
 	require.Equal(t, 200, code)
 
-	res, code = get(t, ts.URL+"/api/v1/find?site=radio-t&url=https://radio-t.com/blah&sort=+time")
+	// get as regular user
+	res, code = get(t, ts.URL+"/api/v1/find?site=remark42&url=https://radio-t.com/blah&sort=+time")
 	assert.Equal(t, 200, code)
 	comments = commentsWithInfo{}
 	err = json.Unmarshal([]byte(res), &comments)
-	assert.Nil(t, err)
-	assert.Equal(t, 2, len(comments.Comments), "should have 2 comments")
-	assert.Equal(t, "", comments.Comments[0].Text)
-	assert.True(t, comments.Comments[0].Deleted)
+	assert.NoError(t, err)
+	require.Equal(t, 4, len(comments.Comments), "should have 4 comments")
+	assert.Equal(t, "test test #1", comments.Comments[2].Text, "comment not removed and not cleared")
+	assert.False(t, comments.Comments[2].Deleted, "not deleted")
 
-	srv.Cache = &cache.Nop{} // TODO: with lru cache it won't be refreshed and invalidated for long time
+	srv.pubRest.cache = cache.NewScache(cache.NewNopCache()) // TODO: with lru cache it won't be refreshed and invalidated for long
+	// time
 	time.Sleep(50 * time.Millisecond)
-	res, code = get(t, ts.URL+"/api/v1/find?site=radio-t&url=https://radio-t.com/blah&sort=+time")
+	res, code = get(t, ts.URL+"/api/v1/find?site=remark42&url=https://radio-t.com/blah&sort=+time")
 	assert.Equal(t, 200, code)
 	comments = commentsWithInfo{}
 	err = json.Unmarshal([]byte(res), &comments)
-	assert.Nil(t, err)
-	assert.Equal(t, 2, len(comments.Comments), "should have 2 comments")
-	assert.Equal(t, "test test #1", comments.Comments[0].Text)
-	assert.False(t, comments.Comments[0].Deleted)
+	assert.NoError(t, err)
+	require.Equal(t, 4, len(comments.Comments), "should have 4 comments")
+	assert.Equal(t, "test test #1", comments.Comments[2].Text, "restored")
+	assert.False(t, comments.Comments[2].Deleted)
+
+	assert.False(t, srv.adminRest.dataService.IsBlocked("remark42", "user1"))
+	assert.False(t, srv.adminRest.dataService.IsBlocked("remark42", "user2"))
 }
 
 func TestAdmin_BlockedList(t *testing.T) {
-	ts, _, teardown := startupT(t)
+	ts, srv, teardown := startupT(t)
 	defer teardown()
 
+	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "remark42",
+		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user1 name", ID: "user1"}}
+	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "remark42",
+		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user2 name", ID: "user2"}}
+
+	// write comments for user1 and user2
+	_, err := srv.DataService.Create(c1)
+	assert.NoError(t, err)
+	_, err = srv.DataService.Create(c2)
+	assert.NoError(t, err)
+
 	// block user1
 	req, err := http.NewRequest(http.MethodPut,
-		fmt.Sprintf("%s/api/v1/admin/user/%s?site=radio-t&block=%d", ts.URL, "user1", 1), nil)
-	assert.Nil(t, err)
+		fmt.Sprintf("%s/api/v1/admin/user/%s?site=remark42&block=%d", ts.URL, "user1", 1), http.NoBody)
+	assert.NoError(t, err)
 	res, err := sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, res.Body.Close())
 	assert.Equal(t, 200, res.StatusCode)
 
 	// block user2
 	req, err = http.NewRequest(http.MethodPut,
-		fmt.Sprintf("%s/api/v1/admin/user/%s?site=radio-t&block=%d&ttl=50ms", ts.URL, "user2", 1), nil)
-	assert.Nil(t, err)
+		fmt.Sprintf("%s/api/v1/admin/user/%s?site=remark42&block=%d&ttl=150ms", ts.URL, "user2", 1), http.NoBody)
+	assert.NoError(t, err)
 	res, err = sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, res.Body.Close())
 	assert.Equal(t, 200, res.StatusCode)
 
-	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/blocked?site=radio-t", nil)
+	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/blocked?site=remark42", http.NoBody)
 	require.NoError(t, err)
 	res, err = sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
 	require.Equal(t, 200, res.StatusCode)
 	users := []store.BlockedUser{}
 	err = json.NewDecoder(res.Body).Decode(&users)
-	assert.Nil(t, err)
-	assert.Equal(t, 2, len(users), "two users blocked")
+	assert.NoError(t, err)
+	require.NoError(t, res.Body.Close())
+	require.Equal(t, 2, len(users), "two users blocked")
 	assert.Equal(t, "user1", users[0].ID)
+	assert.Equal(t, "user1 name", users[0].Name)
 	assert.Equal(t, "user2", users[1].ID)
+	assert.Equal(t, "user2 name", users[1].Name)
+	t.Logf("%+v", users)
+	time.Sleep(150 * time.Millisecond)
 
-	time.Sleep(50 * time.Millisecond)
-
-	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/blocked?site=radio-t", nil)
+	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/blocked?site=remark42", http.NoBody)
 	require.NoError(t, err)
 	res, err = sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
 	require.Equal(t, 200, res.StatusCode)
 	users = []store.BlockedUser{}
 	err = json.NewDecoder(res.Body).Decode(&users)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	require.NoError(t, res.Body.Close())
 	assert.Equal(t, 1, len(users), "one user left blocked")
-
 }
 
 func TestAdmin_ReadOnly(t *testing.T) {
 	ts, srv, teardown := startupT(t)
 	defer teardown()
 
-	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "radio-t",
+	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "remark42",
 		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user1 name", ID: "user1"}}
-	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "radio-t",
+	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "remark42",
 		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user2", ID: "user2"}}
 
 	_, err := srv.DataService.Create(c1)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	_, err = srv.DataService.Create(c2)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 
-	info, err := srv.DataService.Info(store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}, 0)
-	assert.Nil(t, err)
+	info, err := srv.DataService.Info(store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}, 0)
+	assert.NoError(t, err)
 	assert.False(t, info.ReadOnly)
 
 	// set post to read-only
 	req, err := http.NewRequest(http.MethodPut,
-		fmt.Sprintf("%s/api/v1/admin/readonly?site=radio-t&url=https://radio-t.com/blah&ro=1", ts.URL), nil)
-	assert.Nil(t, err)
+		fmt.Sprintf("%s/api/v1/admin/readonly?site=remark42&url=https://radio-t.com/blah&ro=1", ts.URL), http.NoBody)
+	assert.NoError(t, err)
 	resp, err := sendReq(t, req, "") // non-admin user
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 401, resp.StatusCode)
 	resp, err = sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 200, resp.StatusCode)
-	info, err = srv.DataService.Info(store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}, 0)
-	assert.Nil(t, err)
+	info, err = srv.DataService.Info(store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}, 0)
+	assert.NoError(t, err)
 	assert.True(t, info.ReadOnly)
 
 	// try to write comment
 	c := store.Comment{Text: "test test #2", ParentID: "p1",
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}}
 	b, err := json.Marshal(c)
-	assert.Nil(t, err, "can't marshal comment %+v", c)
+	assert.NoError(t, err, "can't marshal comment %+v", c)
 	req, err = http.NewRequest("POST", ts.URL+"/api/v1/comment", bytes.NewBuffer(b))
 	require.NoError(t, err)
 	resp, err = sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, http.StatusForbidden, resp.StatusCode)
 
 	// reset post's read-only
 	req, err = http.NewRequest(http.MethodPut,
-		fmt.Sprintf("%s/api/v1/admin/readonly?site=radio-t&url=https://radio-t.com/blah&ro=0", ts.URL), nil)
-	assert.Nil(t, err)
+		fmt.Sprintf("%s/api/v1/admin/readonly?site=remark42&url=https://radio-t.com/blah&ro=0", ts.URL), http.NoBody)
+	assert.NoError(t, err)
 	resp, err = sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 200, resp.StatusCode)
-	info, err = srv.DataService.Info(store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}, 0)
-	assert.Nil(t, err)
+	info, err = srv.DataService.Info(store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}, 0)
+	assert.NoError(t, err)
 	assert.False(t, info.ReadOnly)
 
 	// try to write comment
 	c = store.Comment{Text: "test test #2", ParentID: "p1",
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}}
 	b, err = json.Marshal(c)
-	assert.Nil(t, err, "can't marshal comment %+v", c)
+	assert.NoError(t, err, "can't marshal comment %+v", c)
 	req, err = http.NewRequest("POST", ts.URL+"/api/v1/comment", bytes.NewBuffer(b))
 	require.NoError(t, err)
 	resp, err = sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, http.StatusCreated, resp.StatusCode)
 }
 
@@ -443,20 +502,21 @@ func TestAdmin_ReadOnlyNoComments(t *testing.T) {
 
 	// set post to read-only
 	req, err := http.NewRequest(http.MethodPut,
-		fmt.Sprintf("%s/api/v1/admin/readonly?site=radio-t&url=https://radio-t.com/blah&ro=1", ts.URL), nil)
-	assert.Nil(t, err)
+		fmt.Sprintf("%s/api/v1/admin/readonly?site=remark42&url=https://radio-t.com/blah&ro=1", ts.URL), http.NoBody)
+	assert.NoError(t, err)
 	requireAdminOnly(t, req)
 	resp, err := sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 200, resp.StatusCode)
-	_, err = srv.DataService.Info(store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}, 0)
-	assert.NotNil(t, err)
+	_, err = srv.DataService.Info(store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}, 0)
+	assert.Error(t, err)
 
-	res, code := get(t, ts.URL+"/api/v1/find?site=radio-t&url=https://radio-t.com/blah&format=tree")
+	res, code := get(t, ts.URL+"/api/v1/find?site=remark42&url=https://radio-t.com/blah&format=tree")
 	assert.Equal(t, 200, code)
 	comments := commentsWithInfo{}
 	err = json.Unmarshal([]byte(res), &comments)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 0, len(comments.Comments), "should have 0 comments")
 	assert.True(t, comments.Info.ReadOnly)
 	t.Logf("%+v", comments)
@@ -466,36 +526,38 @@ func TestAdmin_ReadOnlyWithAge(t *testing.T) {
 	ts, srv, teardown := startupT(t)
 	defer teardown()
 
-	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "radio-t",
+	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "remark42",
 		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user1 name", ID: "user1"},
 		Timestamp: time.Date(2001, 1, 1, 1, 1, 1, 0, time.Local)}
 	_, err := srv.DataService.Create(c1)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 
-	info, err := srv.DataService.Info(store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}, 10)
-	assert.Nil(t, err)
+	info, err := srv.DataService.Info(store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}, 10)
+	assert.NoError(t, err)
 	assert.True(t, info.ReadOnly, "ro by age")
 
 	// set post to read-only
 	req, err := http.NewRequest(http.MethodPut,
-		fmt.Sprintf("%s/api/v1/admin/readonly?site=radio-t&url=https://radio-t.com/blah&ro=1", ts.URL), nil)
-	assert.Nil(t, err)
+		fmt.Sprintf("%s/api/v1/admin/readonly?site=remark42&url=https://radio-t.com/blah&ro=1", ts.URL), http.NoBody)
+	assert.NoError(t, err)
 	requireAdminOnly(t, req)
 	resp, err := sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 200, resp.StatusCode)
-	info, err = srv.DataService.Info(store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}, 0)
+	info, err = srv.DataService.Info(store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}, 0)
 	assert.NoError(t, err)
 	assert.True(t, info.ReadOnly)
 
 	// reset post's read-only
 	req, err = http.NewRequest(http.MethodPut,
-		fmt.Sprintf("%s/api/v1/admin/readonly?site=radio-t&url=https://radio-t.com/blah&ro=0", ts.URL), nil)
-	assert.Nil(t, err)
+		fmt.Sprintf("%s/api/v1/admin/readonly?site=remark42&url=https://radio-t.com/blah&ro=0", ts.URL), http.NoBody)
+	assert.NoError(t, err)
 	resp, err = sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 403, resp.StatusCode)
-	info, err = srv.DataService.Info(store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah"}, 0)
+	info, err = srv.DataService.Info(store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah"}, 0)
 	assert.NoError(t, err)
 	assert.True(t, info.ReadOnly)
 
@@ -504,53 +566,55 @@ func TestAdmin_Verify(t *testing.T) {
 	ts, srv, teardown := startupT(t)
 	defer teardown()
 
-	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "radio-t",
+	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "remark42",
 		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user1 name", ID: "user1"}}
-	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "radio-t",
+	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "remark42",
 		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user2", ID: "user2"}}
 
 	_, err := srv.DataService.Create(c1)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	_, err = srv.DataService.Create(c2)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 
-	verified := srv.DataService.IsVerified("radio-t", "user1")
+	verified := srv.DataService.IsVerified("remark42", "user1")
 	assert.False(t, verified)
 
 	req, err := http.NewRequest(http.MethodPut,
-		fmt.Sprintf("%s/api/v1/admin/verify/user1?site=radio-t&verified=1", ts.URL), nil)
-	assert.Nil(t, err)
+		fmt.Sprintf("%s/api/v1/admin/verify/user1?site=remark42&verified=1", ts.URL), http.NoBody)
+	assert.NoError(t, err)
 	requireAdminOnly(t, req)
 	resp, err := sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 200, resp.StatusCode)
-	verified = srv.DataService.IsVerified("radio-t", "user1")
+	verified = srv.DataService.IsVerified("remark42", "user1")
 	assert.True(t, verified)
 
-	res, code := get(t, ts.URL+"/api/v1/find?site=radio-t&url=https://radio-t.com/blah&sort=+time")
+	res, code := get(t, ts.URL+"/api/v1/find?site=remark42&url=https://radio-t.com/blah&sort=+time")
 	assert.Equal(t, 200, code)
 	comments := commentsWithInfo{}
 	err = json.Unmarshal([]byte(res), &comments)
-	assert.Nil(t, err)
-	assert.Equal(t, 2, len(comments.Comments), "should have 2 comments")
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(comments.Comments), "should have 2 comments")
 	assert.Equal(t, "test test #1", comments.Comments[0].Text)
 	assert.True(t, comments.Comments[0].User.Verified)
 
 	req, err = http.NewRequest(http.MethodPut,
-		fmt.Sprintf("%s/api/v1/admin/verify/user1?site=radio-t&verified=0", ts.URL), nil)
-	assert.Nil(t, err)
+		fmt.Sprintf("%s/api/v1/admin/verify/user1?site=remark42&verified=0", ts.URL), http.NoBody)
+	assert.NoError(t, err)
 	resp, err = sendReq(t, req, adminUmputunToken)
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 200, resp.StatusCode)
-	verified = srv.DataService.IsVerified("radio-t", "user1")
+	verified = srv.DataService.IsVerified("remark42", "user1")
 	assert.False(t, verified)
 
-	res, code = get(t, ts.URL+"/api/v1/find?site=radio-t&url=https://radio-t.com/blah&sort=+time")
+	res, code = get(t, ts.URL+"/api/v1/find?site=remark42&url=https://radio-t.com/blah&sort=+time")
 	assert.Equal(t, 200, code)
 	comments = commentsWithInfo{}
 	err = json.Unmarshal([]byte(res), &comments)
-	assert.Nil(t, err)
-	assert.Equal(t, 2, len(comments.Comments), "should have 2 comments")
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(comments.Comments), "should have 2 comments")
 	assert.Equal(t, "test test #1", comments.Comments[0].Text)
 	assert.False(t, comments.Comments[0].User.Verified)
 }
@@ -560,14 +624,14 @@ func TestAdmin_ExportStream(t *testing.T) {
 	defer teardown()
 
 	c1 := store.Comment{Text: "test test #1",
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah1"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah1"}}
 	c2 := store.Comment{Text: "test test #2", ParentID: "p1",
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah2"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah2"}}
 
 	addComment(t, c1, ts)
 	addComment(t, c2, ts)
 
-	body, code := getWithAdminAuth(t, ts.URL+"/api/v1/admin/export?site=radio-t&mode=stream")
+	body, code := getWithAdminAuth(t, ts.URL+"/api/v1/admin/export?site=remark42&mode=stream")
 	assert.Equal(t, 200, code)
 	assert.Equal(t, 3, strings.Count(body, "\n"))
 	assert.Equal(t, 2, strings.Count(body, "\"text\""))
@@ -579,14 +643,14 @@ func TestAdmin_ExportFile(t *testing.T) {
 	defer teardown()
 
 	c1 := store.Comment{Text: "test test #1",
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah1"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah1"}}
 	c2 := store.Comment{Text: "test test #2", ParentID: "p1",
-		Locator: store.Locator{SiteID: "radio-t", URL: "https://radio-t.com/blah2"}}
+		Locator: store.Locator{SiteID: "remark42", URL: "https://radio-t.com/blah2"}}
 
 	addComment(t, c1, ts)
 	addComment(t, c2, ts)
 
-	req, err := http.NewRequest("GET", ts.URL+"/api/v1/admin/export?site=radio-t&mode=file", nil)
+	req, err := http.NewRequest("GET", ts.URL+"/api/v1/admin/export?site=remark42&mode=file", http.NoBody)
 	require.NoError(t, err)
 	requireAdminOnly(t, req)
 	resp, err := sendReq(t, req, adminUmputunToken)
@@ -597,7 +661,8 @@ func TestAdmin_ExportFile(t *testing.T) {
 
 	ungzReader, err := gzip.NewReader(resp.Body)
 	assert.NoError(t, err)
-	ungzBody, err := ioutil.ReadAll(ungzReader)
+	assert.NoError(t, resp.Body.Close())
+	ungzBody, err := io.ReadAll(ungzReader)
 	assert.NoError(t, err)
 	assert.Equal(t, 3, strings.Count(string(ungzBody), "\n"))
 	assert.Equal(t, 2, strings.Count(string(ungzBody), "\"text\""))
@@ -608,24 +673,32 @@ func TestAdmin_DeleteMeRequest(t *testing.T) {
 	ts, srv, teardown := startupT(t)
 	defer teardown()
 
-	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "radio-t",
+	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "remark42",
 		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user1 name", ID: "user1"}}
-	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "radio-t",
+	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "remark42",
 		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user2", ID: "user2"}}
 
 	_, err := srv.DataService.Create(c1)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	_, err = srv.DataService.Create(c2)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 
-	comments, err := srv.DataService.User("radio-t", "user1", 0, 0)
-	assert.Nil(t, err)
+	comments, err := srv.DataService.User("remark42", "user1", 0, 0, store.User{})
+	assert.NoError(t, err)
 	assert.Equal(t, 1, len(comments), "a comment for user1")
 
+	email, err := srv.DataService.SetUserEmail("remark42", "user1", "test@example.org")
+	assert.NoError(t, err)
+	assert.Equal(t, "test@example.org", email, "new email for user1")
+
+	email, err = srv.DataService.GetUserEmail("remark42", "user1")
+	assert.NoError(t, err)
+	assert.Equal(t, "test@example.org", email, "new email for user1 is readable")
+
 	claims := token.Claims{
 		SessionOnly: true,
 		StandardClaims: jwt.StandardClaims{
-			Audience:  "radio-t",
+			Audience:  "remark42",
 			Id:        "1234567",
 			Issuer:    "remark42",
 			NotBefore: time.Now().Add(-1 * time.Minute).Unix(),
@@ -640,53 +713,60 @@ func TestAdmin_DeleteMeRequest(t *testing.T) {
 		},
 	}
 
-	require.NoError(t, os.MkdirAll("/tmp/ava-remark42/42", 0700))
-	require.NoError(t, ioutil.WriteFile("/tmp/ava-remark42/42/pic.image", []byte("some image data"), 0600))
+	require.NoError(t, os.MkdirAll(os.TempDir()+"/ava-remark42/42", 0o700))
+	require.NoError(t, os.WriteFile(os.TempDir()+"/ava-remark42/42/pic.image", []byte("some image data"), 0o600))
 
 	tkn, err := srv.Authenticator.TokenService().Token(claims)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 
 	client := http.Client{}
-	req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("%s/api/v1/admin/deleteme?token=%s", ts.URL, tkn), nil)
-	assert.Nil(t, err)
+	req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("%s/api/v1/admin/deleteme?token=%s", ts.URL, tkn), http.NoBody)
+	assert.NoError(t, err)
 
 	req.SetBasicAuth("admin", "password")
 	resp, err := client.Do(req)
 	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 200, resp.StatusCode)
 
-	_, err = srv.DataService.User("radio-t", "user1", 0, 0)
+	_, err = srv.DataService.User("remark42", "user1", 0, 0, store.User{})
 	assert.EqualError(t, err, "no comments for user user1 in store")
+
+	email, err = srv.DataService.GetUserEmail("remark42", "user1")
+	assert.NoError(t, err)
+	assert.Empty(t, email, "user1 email was deleted")
+
 }
 
 func TestAdmin_DeleteMeRequestFailed(t *testing.T) {
 	ts, srv, teardown := startupT(t)
 	defer teardown()
 
-	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "radio-t",
+	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "remark42",
 		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user1 name", ID: "user1"}}
-	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "radio-t",
+	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "remark42",
 		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user2", ID: "user2"}}
 
 	_, err := srv.DataService.Create(c1)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	_, err = srv.DataService.Create(c2)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 
 	// try with bad token
 	client := http.Client{}
-	req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("%s/api/v1/admin/deleteme?token=%s", ts.URL, "bad token"), nil)
-	assert.Nil(t, err)
+	req, err := http.NewRequest(http.MethodGet, fmt.Sprintf("%s/api/v1/admin/deleteme?token=%s", ts.URL, "bad token"), http.NoBody)
+	assert.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
 	resp, err := client.Do(req)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
 	assert.Equal(t, 400, resp.StatusCode)
 
 	// try with bad auth
 	claims := token.Claims{
 		SessionOnly: true,
 		StandardClaims: jwt.StandardClaims{
-			Audience:  "radio-t",
+			Audience:  "remark42",
 			Id:        "1234567",
 			Issuer:    "remark42",
 			NotBefore: time.Now().Add(-1 * time.Minute).Unix(),
@@ -701,39 +781,42 @@ func TestAdmin_DeleteMeRequestFailed(t *testing.T) {
 	}
 
 	tkn, err := srv.Authenticator.TokenService().Token(claims)
-	assert.Nil(t, err)
-	req, err = http.NewRequest(http.MethodGet, fmt.Sprintf("%s/api/v1/admin/deleteme?token=%s", ts.URL, tkn), nil)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	req, err = http.NewRequest(http.MethodGet, fmt.Sprintf("%s/api/v1/admin/deleteme?token=%s", ts.URL, tkn), http.NoBody)
+	assert.NoError(t, err)
 	req.SetBasicAuth("admin", "bad-password")
 	resp, err = client.Do(req)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
 	assert.Equal(t, 403, resp.StatusCode)
 
 	// try bad user
 	badClaims := claims
 	badClaims.User.ID = "no-such-id"
 	tkn, err = srv.Authenticator.TokenService().Token(badClaims)
-	assert.Nil(t, err)
-	req, err = http.NewRequest(http.MethodGet, fmt.Sprintf("%s/api/v1/admin/deleteme?token=%s", ts.URL, tkn), nil)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	req, err = http.NewRequest(http.MethodGet, fmt.Sprintf("%s/api/v1/admin/deleteme?token=%s", ts.URL, tkn), http.NoBody)
+	assert.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
 	resp, err = client.Do(req)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
 	assert.Equal(t, 400, resp.StatusCode, resp.Status)
 
 	// try without deleteme flag
 	badClaims2 := claims
 	badClaims2.User.SetBoolAttr("delete_me", false)
 	tkn, err = srv.Authenticator.TokenService().Token(badClaims2)
-	assert.Nil(t, err)
-	req, err = http.NewRequest(http.MethodGet, fmt.Sprintf("%s/api/v1/admin/deleteme?token=%s", ts.URL, tkn), nil)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	req, err = http.NewRequest(http.MethodGet, fmt.Sprintf("%s/api/v1/admin/deleteme?token=%s", ts.URL, tkn), http.NoBody)
+	assert.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
 	resp, err = client.Do(req)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, 403, resp.StatusCode)
-	b, err := ioutil.ReadAll(resp.Body)
-	assert.Nil(t, err)
+	b, err := io.ReadAll(resp.Body)
+	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
 	assert.True(t, strings.Contains(string(b), "can't use provided token"))
 }
 
@@ -741,27 +824,28 @@ func TestAdmin_GetUserInfo(t *testing.T) {
 	ts, srv, teardown := startupT(t)
 	defer teardown()
 
-	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "radio-t",
+	c1 := store.Comment{Text: "test test #1", Locator: store.Locator{SiteID: "remark42",
 		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user1 name", ID: "user1"}}
-	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "radio-t",
+	c2 := store.Comment{Text: "test test #2", ParentID: "p1", Locator: store.Locator{SiteID: "remark42",
 		URL: "https://radio-t.com/blah"}, User: store.User{Name: "user2", ID: "user2"}}
 
 	_, err := srv.DataService.Create(c1)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	_, err = srv.DataService.Create(c2)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 
-	body, code := getWithAdminAuth(t, fmt.Sprintf("%s/api/v1/admin/user/user1?site=radio-t&url=https://radio-t.com/blah", ts.URL))
+	body, code := getWithAdminAuth(t, fmt.Sprintf("%s/api/v1/admin/user/user1?site=remark42&url=https://radio-t.com/blah",
+		ts.URL))
 	assert.Equal(t, 200, code)
 	u := store.User{}
 	err = json.Unmarshal([]byte(body), &u)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, store.User{Name: "user1 name", ID: "user1", Picture: "", IP: "823688dafca7393d24c871a2da98a84d8732e927",
 		Admin: false, Blocked: false, Verified: false}, u)
 
-	_, code = get(t, fmt.Sprintf("%s/api/v1/admin/user/user1?site=radio-t&url=https://radio-t.com/blah", ts.URL))
+	_, code = get(t, fmt.Sprintf("%s/api/v1/admin/user/user1?site=remark42&url=https://radio-t.com/blah", ts.URL))
 	assert.Equal(t, 401, code, "no auth")
 
-	_, code = getWithAdminAuth(t, fmt.Sprintf("%s/api/v1/admin/user/userX?site=radio-t&url=https://radio-t.com/blah", ts.URL))
+	_, code = getWithAdminAuth(t, fmt.Sprintf("%s/api/v1/admin/user/userX?site=remark42&url=https://radio-t.com/blah", ts.URL))
 	assert.Equal(t, 400, code, "no info about user")
 }

backend/app/rest/api/migrator.go

@@ -12,22 +12,24 @@ import (
 	"time"
 
 	"github.com/go-chi/render"
+	cache "github.com/go-pkgz/lcw"
 	log "github.com/go-pkgz/lgr"
 	R "github.com/go-pkgz/rest"
-	"github.com/go-pkgz/rest/cache"
 	"github.com/pkg/errors"
 
-	"github.com/umputun/remark/backend/app/migrator"
-	"github.com/umputun/remark/backend/app/rest"
+	"github.com/umputun/remark42/backend/app/migrator"
+	"github.com/umputun/remark42/backend/app/rest"
 )
 
 // Migrator rest with import and export controllers
 type Migrator struct {
-	Cache             cache.LoadingCache
+	Cache             LoadingCache
 	NativeImporter    migrator.Importer
 	DisqusImporter    migrator.Importer
 	WordPressImporter migrator.Importer
+	CommentoImporter  migrator.Importer
 	NativeExporter    migrator.Exporter
+	URLMapperMaker    migrator.MapperMaker
 	KeyStore          KeyStore
 
 	busy map[string]bool
@@ -36,7 +38,7 @@ type Migrator struct {
 
 // KeyStore defines sub-interface for consumers needed just a key
 type KeyStore interface {
-	Key() (key string, err error)
+	Key(siteID string) (key string, err error)
 }
 
 // POST /import?secret=key&site=site-id&provider=disqus|remark|wordpress
@@ -98,7 +100,9 @@ func (m *Migrator) importFormCtrl(w http.ResponseWriter, r *http.Request) {
 	render.JSON(w, r, R.JSON{"status": "import request accepted"})
 }
 
-func (m *Migrator) importWaitCtrl(w http.ResponseWriter, r *http.Request) {
+// GET /wait?site=site-id
+// waits for migration operation (import or remap)
+func (m *Migrator) waitCtrl(w http.ResponseWriter, r *http.Request) {
 	siteID := r.URL.Query().Get("site")
 	timeOut := time.Minute * 15
 	if v := r.URL.Query().Get("timeout"); v != "" {
@@ -152,8 +156,64 @@ func (m *Migrator) exportCtrl(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+// POST /remap?site=site-id
+// remap urls in comments based on given rules (oldUrl newUrl)
+func (m *Migrator) remapCtrl(w http.ResponseWriter, r *http.Request) {
+	siteID := r.URL.Query().Get("site")
+
+	// create new url-mapper from given rules in body
+	mapper, err := m.URLMapperMaker(r.Body)
+	if err != nil {
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "remap failed, bad given rules", rest.ErrDecode)
+		return
+	}
+	defer r.Body.Close()
+
+	// start remap procedure with mapper
+	go func() {
+		m.setBusy(siteID, true)
+		defer m.setBusy(siteID, false)
+
+		// do export
+		fh, e := ioutil.TempFile("", "remark42_convert")
+		if e != nil {
+			log.Printf("[WARN] failed to make temp file %+v", e)
+			return
+		}
+		defer func() {
+			if e = os.Remove(fh.Name()); e != nil {
+				log.Printf("[WARN] failed to remove temp file %+v", e)
+			}
+		}()
+		log.Printf("[DEBUG] start export for site=%s", siteID)
+		if _, e = m.NativeExporter.Export(fh, siteID); e != nil {
+			log.Printf("[WARN] export failed with %+v", e)
+			return
+		}
+
+		if _, e = fh.Seek(0, 0); e != nil {
+			log.Printf("[WARN] failed to seek file %+v", e)
+			return
+		}
+
+		log.Printf("[DEBUG] start import for site=%s", siteID)
+		mappedReader := migrator.WithMapper(fh, mapper)
+		size, e := m.NativeImporter.Import(mappedReader, siteID)
+		if e != nil {
+			log.Printf("[WARN] import failed with %+v", e)
+			return
+		}
+
+		m.Cache.Flush(cache.Flusher(siteID).Scopes(siteID))
+		log.Printf("[DEBUG] convert request completed. site=%s, comments=%d", siteID, size)
+	}()
+
+	render.Status(r, http.StatusAccepted)
+	render.JSON(w, r, R.JSON{"status": "convert request accepted"})
+}
+
 // runImport reads from tmpfile and import for given siteID and provider
-func (m *Migrator) runImport(siteID string, provider string, tmpfile string) {
+func (m *Migrator) runImport(siteID, provider, tmpfile string) {
 	m.setBusy(siteID, true)
 
 	defer func() {
@@ -169,12 +229,14 @@ func (m *Migrator) runImport(siteID string, provider string, tmpfile string) {
 		importer = m.DisqusImporter
 	case "wordpress":
 		importer = m.WordPressImporter
+	case "commento":
+		importer = m.CommentoImporter
 	default:
 		importer = m.NativeImporter
 	}
 	log.Printf("[DEBUG] import request for site=%s, provider=%s", siteID, provider)
 
-	fh, err := os.Open(tmpfile)
+	fh, err := os.Open(tmpfile) // nolint
 	if err != nil {
 		log.Printf("[WARN] import failed, %v", err)
 		return

backend/app/rest/api/migrator_test.go

@@ -3,9 +3,9 @@ package api
 import (
 	"bytes"
 	"compress/gzip"
+	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"mime/multipart"
 	"net/http"
 	"net/http/httptest"
@@ -15,36 +15,53 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/service"
 )
 
 func TestMigrator_Import(t *testing.T) {
 	ts, _, teardown := startupT(t)
 	defer teardown()
 
-	r := strings.NewReader(`{"version":1} {"id":"2aa0478c-df1b-46b1-b561-03d507cf482c","pid":"","text":"<p>test test #1</p>","user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"radio-t","url":"https://radio-t.com/blah1"},"score":0,"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}
-	{"id":"83fd97fd-ff64-48d1-9fb7-ca7769c77037","pid":"p1","text":"<p>test test #2</p>","user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"radio-t","url":"https://radio-t.com/blah2"},"score":0,"votes":{},"time":"2018-04-30T01:37:00.861387771-05:00"}`)
+	r := strings.NewReader(`{"version":1} {"id":"2aa0478c-df1b-46b1-b561-03d507cf482c","pid":"","text":"<p>test test #1</p>",
+"user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com",
+"admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"remark42","url":"https://radio-t.com/blah1"},
+"score":0,"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}
+	{"id":"83fd97fd-ff64-48d1-9fb7-ca7769c77037","pid":"p1","text":"<p>test test #2</p>","user":{"name":"developer one",
+"id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,
+"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"remark42","url":"https://radio-t.com/blah2"},"score":0,
+"votes":{},"time":"2018-04-30T01:37:00.861387771-05:00"}`)
 
 	client := &http.Client{Timeout: 1 * time.Second}
-	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=radio-t&provider=native", r)
+	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=remark42&provider=native", r)
+	require.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	resp, err := client.Do(req)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, http.StatusAccepted, resp.StatusCode)
 
-	b, err := ioutil.ReadAll(resp.Body)
-	assert.Nil(t, err)
+	b, err := io.ReadAll(resp.Body)
+	assert.NoError(t, err)
 	assert.Equal(t, "{\"status\":\"import request accepted\"}\n", string(b))
+	assert.NoError(t, resp.Body.Close())
 
-	waitForImportCompletion(t, ts)
+	waitForMigrationCompletion(t, ts)
 }
 
 func TestMigrator_ImportForm(t *testing.T) {
 	ts, _, teardown := startupT(t)
 	defer teardown()
 
-	r := strings.NewReader(`{"version":1} {"id":"2aa0478c-df1b-46b1-b561-03d507cf482c","pid":"","text":"<p>test test #1</p>","user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"radio-t","url":"https://radio-t.com/blah1"},"score":0,"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}
-	{"id":"83fd97fd-ff64-48d1-9fb7-ca7769c77037","pid":"p1","text":"<p>test test #2</p>","user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"radio-t","url":"https://radio-t.com/blah2"},"score":0,"votes":{},"time":"2018-04-30T01:37:00.861387771-05:00"}`)
+	r := strings.NewReader(`{"version":1} {"id":"2aa0478c-df1b-46b1-b561-03d507cf482c","pid":"","text":"<p>test test #1</p>",
+"user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com",
+"admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"remark42","url":"https://radio-t.com/blah1"},
+"score":0,"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}
+	{"id":"83fd97fd-ff64-48d1-9fb7-ca7769c77037","pid":"p1","text":"<p>test test #2</p>","user":{"name":"developer one",
+"id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,
+"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"remark42","url":"https://radio-t.com/blah2"},"score":0,
+"votes":{},"time":"2018-04-30T01:37:00.861387771-05:00"}`)
 
 	bodyBuf := &bytes.Buffer{}
 	bodyWriter := multipart.NewWriter(bodyBuf)
@@ -56,15 +73,16 @@ func TestMigrator_ImportForm(t *testing.T) {
 	require.NoError(t, bodyWriter.Close())
 
 	authts := strings.Replace(ts.URL, "http://", "http://admin:password@", 1)
-	resp, err := http.Post(authts+"/api/v1/admin/import/form?site=radio-t&provider=native", contentType, bodyBuf)
-	assert.Nil(t, err)
+	resp, err := http.Post(authts+"/api/v1/admin/import/form?site=remark42&provider=native", contentType, bodyBuf)
+	assert.NoError(t, err)
 	assert.Equal(t, http.StatusAccepted, resp.StatusCode)
 
-	b, err := ioutil.ReadAll(resp.Body)
-	assert.Nil(t, err)
+	b, err := io.ReadAll(resp.Body)
+	assert.NoError(t, err)
 	assert.Equal(t, "{\"status\":\"import request accepted\"}\n", string(b))
+	assert.NoError(t, resp.Body.Close())
 
-	waitForImportCompletion(t, ts)
+	waitForMigrationCompletion(t, ts)
 }
 
 func TestMigrator_ImportFromWP(t *testing.T) {
@@ -74,33 +92,69 @@ func TestMigrator_ImportFromWP(t *testing.T) {
 	r := strings.NewReader(strings.Replace(xmlTestWP, "'", "`", -1))
 
 	client := &http.Client{Timeout: 1 * time.Second}
-	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=radio-t&provider=wordpress", r)
-	assert.Nil(t, err)
+	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=remark42&provider=wordpress", r)
+	assert.NoError(t, err)
 	req.Header.Add("Content-Type", "application/xml; charset=utf-8")
 	req.SetBasicAuth("admin", "password")
 	resp, err := client.Do(req)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	assert.Equal(t, http.StatusAccepted, resp.StatusCode)
 
-	b, err := ioutil.ReadAll(resp.Body)
-	assert.Nil(t, err)
+	b, err := io.ReadAll(resp.Body)
+	assert.NoError(t, err)
 	assert.Equal(t, "{\"status\":\"import request accepted\"}\n", string(b))
+	assert.NoError(t, resp.Body.Close())
 
-	waitForImportCompletion(t, ts)
+	waitForMigrationCompletion(t, ts)
+}
+
+func TestMigrator_ImportFromCommento(t *testing.T) {
+	ts, _, teardown := startupT(t)
+	defer teardown()
+
+	r := strings.NewReader(`{"version":1,"comments":[{"commentHex":"7d77e39fcd813241d6281478cc8f21ab5f807d043c750bc1a936bc23b34fb854",
+"domain":"example.com","url":"https://example.com/blog/post/1","commenterHex":"a1ac58ed1146bd7fe3feff6a7276f73955c3bfd23cacee00e2e0a7a89b1a8c10",
+"markdown":"Example content","html":"","parentHex":"root","score":0,"state":"approved","creationDate":"2021-03-17T12:09:47.722181Z",
+"direction":0,"deleted":false}],"commenters":[{"commenterHex":"a1ac58ed1146bd7fe3feff6a7276f73955c3bfd23cacee00e2e0a7a89b1a8c10",
+"email":"somegreatmail@gmail.com","name":"User5276","link":"https://example.com/profile/257","photo":"https://secure.gravatar.com/avatar/8f279626d26175134b0d5c88648172f7",
+"provider":"sso:example.com","joinDate":"2021-03-19T19:27:25.954285Z","isModerator":false}]}`)
+
+	client := &http.Client{Timeout: 1 * time.Second}
+	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=remark42&provider=commento", r)
+	assert.NoError(t, err)
+	req.Header.Add("Content-Type", "application/json; charset=utf-8")
+	req.SetBasicAuth("admin", "password")
+	resp, err := client.Do(req)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusAccepted, resp.StatusCode)
+
+	b, err := io.ReadAll(resp.Body)
+	assert.NoError(t, err)
+	assert.Equal(t, "{\"status\":\"import request accepted\"}\n", string(b))
+	assert.NoError(t, resp.Body.Close())
+
+	waitForMigrationCompletion(t, ts)
 }
 
 func TestMigrator_ImportRejected(t *testing.T) {
 	ts, _, teardown := startupT(t)
 	defer teardown()
 
-	r := strings.NewReader(`{"version":1} {"id":"2aa0478c-df1b-46b1-b561-03d507cf482c","pid":"","text":"<p>test test #1</p>","user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"radio-t","url":"https://radio-t.com/blah1"},"score":0,"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}
-	{"id":"83fd97fd-ff64-48d1-9fb7-ca7769c77037","pid":"p1","text":"<p>test test #2</p>","user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"radio-t","url":"https://radio-t.com/blah2"},"score":0,"votes":{},"time":"2018-04-30T01:37:00.861387771-05:00"}`)
+	r := strings.NewReader(`{"version":1} {"id":"2aa0478c-df1b-46b1-b561-03d507cf482c","pid":"","text":"<p>test test #1</p>",
+"user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com",
+"admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"remark42","url":"https://radio-t.com/blah1"},
+"score":0,"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}
+	{"id":"83fd97fd-ff64-48d1-9fb7-ca7769c77037","pid":"p1","text":"<p>test test #2</p>","user":{"name":"developer one",
+"id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,
+"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"remark42","url":"https://radio-t.com/blah2"},"score":0,
+"votes":{},"time":"2018-04-30T01:37:00.861387771-05:00"}`)
 
 	client := &http.Client{Timeout: 1 * time.Second}
-	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=radio-t&provider=native&secret=XYZ", r)
-	assert.Nil(t, err)
+	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=remark42&provider=native&secret=XYZ", r)
+	assert.NoError(t, err)
 	resp, err := client.Do(req)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
 	assert.Equal(t, http.StatusUnauthorized, resp.StatusCode)
 }
 
@@ -108,127 +162,252 @@ func TestMigrator_ImportDouble(t *testing.T) {
 	ts, _, teardown := startupT(t)
 	defer teardown()
 
-	tmpl := `{"id":"%d","pid":"","text":"<p>test test #1</p>","user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"radio-t","url":"https://radio-t.com/blah1"},"score":0,"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}`
+	tmpl := `{"id":"%d","pid":"","text":"<p>test test #1</p>","user":{"name":"developer one","id":"dev",
+"picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,
+"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"remark42","url":"https://radio-t.com/blah1"},"score":0,
+"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}`
 	recs := []string{}
-	for i := 0; i < 150; i++ {
+	for i := 0; i < 50; i++ {
 		recs = append(recs, fmt.Sprintf(tmpl, i))
 	}
 	r := strings.NewReader(`{"version":1}` + strings.Join(recs, "\n")) // reader with 10k records
 	client := &http.Client{Timeout: 1 * time.Second}
-	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=radio-t&provider=native", r)
+	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=remark42&provider=native", r)
+	require.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	resp, err := client.Do(req)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
 	assert.Equal(t, http.StatusAccepted, resp.StatusCode)
 
-	client = &http.Client{Timeout: 1 * time.Second}
-	req, err = http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=radio-t&provider=native", r)
+	client = &http.Client{Timeout: 5 * time.Second}
+	req, err = http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=remark42&provider=native", r)
+	require.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
-	assert.Nil(t, err)
+	assert.NoError(t, err)
 	resp, err = client.Do(req)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
 	assert.Equal(t, http.StatusConflict, resp.StatusCode)
-	waitForImportCompletion(t, ts)
+	waitForMigrationCompletion(t, ts)
 }
 
 func TestMigrator_ImportWaitExpired(t *testing.T) {
 	ts, _, teardown := startupT(t)
 	defer teardown()
 
-	tmpl := `{"id":"%d","pid":"","text":"<p>test test #1</p>","user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"radio-t","url":"https://radio-t.com/blah1"},"score":0,"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}`
-	recs := []string{}
-	for i := 0; i < 150; i++ {
+	tmpl := `{"id":"%d","pid":"","text":"<p>test test #1</p>","user":{"name":"developer one","id":"dev",
+"picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,
+"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"remark42","url":"https://radio-t.com/blah1"},"score":0,
+"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}`
+	nRecs := 50
+	recs := make([]string, 0, nRecs)
+	for i := 0; i < nRecs; i++ {
 		recs = append(recs, fmt.Sprintf(tmpl, i))
 	}
-	r := strings.NewReader(`{"version":1}` + strings.Join(recs, "\n")) // reader with 10k records
-	client := &http.Client{Timeout: 1 * time.Second}
-	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=radio-t&provider=native", r)
+	r := strings.NewReader(`{"version":1}` + strings.Join(recs, "\n")) // reader with `nRecs` records
+	client := &http.Client{Timeout: 5 * time.Second}
+	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=remark42&provider=native", r)
+	require.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
-	require.Nil(t, err)
+	require.NoError(t, err)
 	resp, err := client.Do(req)
-	assert.Nil(t, err)
+	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
 	assert.Equal(t, http.StatusAccepted, resp.StatusCode)
 
-	client = &http.Client{Timeout: 10 * time.Second}
-	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/import/wait?site=radio-t&timeout=100ms", nil)
+	client = &http.Client{Timeout: 5 * time.Second}
+	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/wait?site=remark42&timeout=5ms", http.NoBody)
+	require.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
 	assert.NoError(t, err)
 	resp, err = client.Do(req)
 	assert.NoError(t, err)
+	assert.NoError(t, resp.Body.Close())
 	assert.Equal(t, http.StatusGatewayTimeout, resp.StatusCode)
 
-	waitForImportCompletion(t, ts)
+	waitForMigrationCompletion(t, ts)
 }
 
 func TestMigrator_Export(t *testing.T) {
 	ts, _, teardown := startupT(t)
 	defer teardown()
 
-	r := strings.NewReader(`{"version":1} {"id":"2aa0478c-df1b-46b1-b561-03d507cf482c","pid":"","text":"<p>test test #1</p>","user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"radio-t","url":"https://radio-t.com/blah1"},"score":0,"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}
-	{"id":"83fd97fd-ff64-48d1-9fb7-ca7769c77037","pid":"p1","text":"<p>test test #2</p>","user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"radio-t","url":"https://radio-t.com/blah2"},"score":0,"votes":{},"time":"2018-04-30T01:37:00.861387771-05:00"}`)
+	r := strings.NewReader(`{"version":1} {"id":"2aa0478c-df1b-46b1-b561-03d507cf482c","pid":"","text":"<p>test test #1</p>",
+"user":{"name":"developer one","id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com",
+"admin":true,"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"remark42","url":"https://radio-t.com/blah1"},
+"score":0,"votes":{},"time":"2018-04-30T01:37:00.849053725-05:00"}
+	{"id":"83fd97fd-ff64-48d1-9fb7-ca7769c77037","pid":"p1","text":"<p>test test #2</p>","user":{"name":"developer one",
+"id":"dev","picture":"/api/v1/avatar/remark.image","profile":"https://remark42.com","admin":true,
+"ip":"ae12fe3b5f129b5cc4cdd2b136b7b7947c4d2741"},"locator":{"site":"remark42","url":"https://radio-t.com/blah2"},"score":0,
+"votes":{},"time":"2018-04-30T01:37:00.861387771-05:00"}`)
 
 	// import comments first
 	client := &http.Client{Timeout: 1 * time.Second}
-	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=radio-t&provider=native", r)
-	require.Nil(t, err)
+	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/import?site=remark42&provider=native", r)
+	require.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
 	resp, err := client.Do(req)
-	require.Nil(t, err)
+	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	require.Equal(t, http.StatusAccepted, resp.StatusCode)
-	waitForImportCompletion(t, ts)
+	waitForMigrationCompletion(t, ts)
 
 	// check file mode
-	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/export?mode=file&site=radio-t", nil)
-	require.Nil(t, err)
+	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/export?mode=file&site=remark42", http.NoBody)
+	require.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
 	resp, err = client.Do(req)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	require.Equal(t, 200, resp.StatusCode)
 	require.Equal(t, "application/gzip", resp.Header.Get("Content-Type"))
 
 	ungzReader, err := gzip.NewReader(resp.Body)
 	assert.NoError(t, err)
-	ungzBody, err := ioutil.ReadAll(ungzReader)
+	ungzBody, err := io.ReadAll(ungzReader)
 	assert.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 3, strings.Count(string(ungzBody), "\n"))
 	assert.Equal(t, 2, strings.Count(string(ungzBody), "\"text\""))
 	t.Logf("%s", string(ungzBody))
 
 	// check stream mode
-	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/export?mode=stream&site=radio-t", nil)
-	require.Nil(t, err)
+	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/export?mode=stream&site=remark42", http.NoBody)
+	require.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
 	resp, err = client.Do(req)
-	require.Nil(t, err)
+	require.NoError(t, err)
 	require.Equal(t, 200, resp.StatusCode)
 	require.Equal(t, "text/plain; charset=utf-8", resp.Header.Get("Content-Type"))
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	assert.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	assert.Equal(t, 3, strings.Count(string(body), "\n"))
 	assert.Equal(t, 2, strings.Count(string(body), "\"text\""))
 	t.Logf("%s", string(body))
 
-	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/export?site=radio-t", nil)
-	require.Nil(t, err)
+	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/export?site=remark42", http.NoBody)
+	require.NoError(t, err)
 	resp, err = client.Do(req)
-	require.Nil(t, err)
+	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
 	require.Equal(t, http.StatusUnauthorized, resp.StatusCode)
 }
 
-func waitForImportCompletion(t *testing.T, ts *httptest.Server) {
+func TestMigrator_Remap(t *testing.T) {
+	ts, srv, teardown := startupT(t)
+	defer teardown()
+
+	// create 2 comments in https://remark42.com/demo/
+	c1 := store.Comment{Text: "first comment", Timestamp: time.Now(),
+		Locator: store.Locator{SiteID: "remark42", URL: "https://remark42.com/demo/"}, User: store.User{ID: "u1"}}
+	_, err := srv.DataService.Create(c1)
+	require.NoError(t, err)
+	c2 := store.Comment{Text: "second comment", Timestamp: time.Now(),
+		Locator: store.Locator{SiteID: "remark42", URL: "https://remark42.com/demo/"}, User: store.User{ID: "u2"}}
+	_, err = srv.DataService.Create(c2)
+	require.NoError(t, err)
+
+	// create 1 comment in https://remark42.com/demo-another/
+	c3 := store.Comment{Text: "third comment", Timestamp: time.Now(),
+		Locator: store.Locator{SiteID: "remark42", URL: "https://remark42.com/demo-another/"}, User: store.User{ID: "u3"}}
+	_, err = srv.DataService.Create(c3)
+	require.NoError(t, err)
+
+	// set url https://remark42.com/demo-another/ to be readonly
+	err = srv.DataService.SetMetas("remark42", []service.UserMetaData{}, []service.PostMetaData{{
+		URL:      "https://remark42.com/demo-another/",
+		ReadOnly: true,
+	}})
+	require.NoError(t, err)
+
+	// check that comments created as expected
+	res, code := get(t, ts.URL+"/api/v1/find?site=remark42&url=https://remark42.com/demo/")
+	require.Equal(t, 200, code)
+	comments := commentsWithInfo{}
+	err = json.Unmarshal([]byte(res), &comments)
+	require.NoError(t, err)
+	require.Equal(t, 2, comments.Info.Count)
+	require.False(t, comments.Info.ReadOnly)
+
+	res, code = get(t, ts.URL+"/api/v1/find?site=remark42&url=https://remark42.com/demo-another/")
+	require.Equal(t, 200, code)
+	comments = commentsWithInfo{}
+	err = json.Unmarshal([]byte(res), &comments)
+	require.NoError(t, err)
+	require.Equal(t, 1, comments.Info.Count)
+	require.True(t, comments.Info.ReadOnly)
+
+	// we want remap urls to another domain - www.remark42.com
+	rules := "https://remark42.com/* https://www.remark42.com/*"
+	resp, err := post(t, ts.URL+"/api/v1/admin/remap?site=remark42", rules) // auth as admin
+	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
+	require.Equal(t, http.StatusAccepted, resp.StatusCode)
+	waitForMigrationCompletion(t, ts)
+
+	// after remap finished we should find comments from new urls
+	res, code = get(t, ts.URL+"/api/v1/find?site=remark42&url=https://www.remark42.com/demo/")
+	require.Equal(t, 200, code)
+	comments = commentsWithInfo{}
+	err = json.Unmarshal([]byte(res), &comments)
+	require.NoError(t, err)
+	require.Equal(t, 2, comments.Info.Count)
+	require.False(t, comments.Info.ReadOnly)
+
+	res, code = get(t, ts.URL+"/api/v1/find?site=remark42&url=https://www.remark42.com/demo-another/")
+	require.Equal(t, 200, code)
+	comments = commentsWithInfo{}
+	err = json.Unmarshal([]byte(res), &comments)
+	require.NoError(t, err)
+	require.Equal(t, 1, comments.Info.Count)
+	require.True(t, comments.Info.ReadOnly)
+
+	// should find nothing from previous url
+	res, code = get(t, ts.URL+"/api/v1/find?site=remark42&url=https://remark42.com/demo/")
+	require.Equal(t, 200, code)
+	comments = commentsWithInfo{}
+	err = json.Unmarshal([]byte(res), &comments)
+	require.NoError(t, err)
+	require.Equal(t, 0, comments.Info.Count)
+
+	res, code = get(t, ts.URL+"/api/v1/find?site=remark42&url=https://remark42.com/demo-another/")
+	require.Equal(t, 200, code)
+	comments = commentsWithInfo{}
+	err = json.Unmarshal([]byte(res), &comments)
+	require.NoError(t, err)
+	require.Equal(t, 0, comments.Info.Count)
+}
+
+func TestMigrator_RemapReject(t *testing.T) {
+	ts, _, teardown := startupT(t)
+	defer teardown()
+
+	// without admin credentials
+	client := &http.Client{Timeout: 1 * time.Second}
+	rules := strings.NewReader(`https://remark42.com/* https://www.remark42.com/*`)
+	req, err := http.NewRequest("POST", ts.URL+"/api/v1/admin/remap?site=remark42", rules)
+	require.NoError(t, err)
+	resp, err := client.Do(req)
+	require.NoError(t, err)
+	require.NoError(t, resp.Body.Close())
+	require.Equal(t, http.StatusUnauthorized, resp.StatusCode)
+}
+
+func waitForMigrationCompletion(t *testing.T, ts *httptest.Server) {
 	client := &http.Client{Timeout: 10 * time.Second}
-	req, err := http.NewRequest("GET", ts.URL+"/api/v1/admin/import/wait?site=radio-t", nil)
+	req, err := http.NewRequest("GET", ts.URL+"/api/v1/admin/wait?site=remark42", http.NoBody)
+	require.NoError(t, err)
 	req.SetBasicAuth("admin", "password")
-	assert.NoError(t, err)
 	resp, err := client.Do(req)
 	require.NoError(t, err)
 	assert.Equal(t, 200, resp.StatusCode)
-	b, err := ioutil.ReadAll(resp.Body)
+	b, err := io.ReadAll(resp.Body)
 	require.NoError(t, err)
 	defer resp.Body.Close()
-	assert.Equal(t, "{\"site_id\":\"radio-t\",\"status\":\"completed\"}\n", string(b))
+	assert.Equal(t, "{\"site_id\":\"remark42\",\"status\":\"completed\"}\n", string(b))
 }
 
 var xmlTestWP = `
@@ -320,7 +499,7 @@ var xmlTestWP = `
 		<category domain="post_tag" nicename="alts"><![CDATA[alts]]></category>
 		<category domain="post_tag" nicename="role-playing"><![CDATA[role playing]]></category>
 		<category domain="category" nicename="stuff"><![CDATA[Stuff]]></category>
-		<category domain="post_tag" nicename="wierd-in-a-cant-quite-help-myself-way"><![CDATA[wierd in a can't quite help myself way]]></category>
+		<category domain="post_tag" nicename="weird-in-a-cant-quite-help-myself-way"><![CDATA[weird in a can't quite help myself way]]></category>
 		<wp:postmeta>
 			<wp:meta_key><![CDATA[_edit_last]]></wp:meta_key>
 			<wp:meta_value><![CDATA[2]]></wp:meta_value>

backend/app/rest/api/rest.go

@@ -10,25 +10,27 @@ import (
 	"sync"
 	"time"
 
-	"github.com/didip/tollbooth"
+	"github.com/didip/tollbooth/v6"
 	"github.com/didip/tollbooth_chi"
-	"github.com/go-chi/chi"
-	"github.com/go-chi/chi/middleware"
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
 	"github.com/go-chi/cors"
+	"github.com/go-chi/render"
 	"github.com/go-pkgz/auth"
+	"github.com/go-pkgz/lcw"
 	log "github.com/go-pkgz/lgr"
 	R "github.com/go-pkgz/rest"
-	"github.com/go-pkgz/rest/cache"
 	"github.com/go-pkgz/rest/logger"
 	"github.com/pkg/errors"
 	"github.com/rakyll/statik/fs"
 
-	"github.com/umputun/remark/backend/app/notify"
-	"github.com/umputun/remark/backend/app/rest"
-	"github.com/umputun/remark/backend/app/rest/proxy"
-	"github.com/umputun/remark/backend/app/store"
-	"github.com/umputun/remark/backend/app/store/image"
-	"github.com/umputun/remark/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/notify"
+	"github.com/umputun/remark42/backend/app/rest"
+	"github.com/umputun/remark42/backend/app/rest/proxy"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/image"
+	"github.com/umputun/remark42/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/templates"
 )
 
 // Rest is a rest access server
@@ -37,13 +39,15 @@ type Rest struct {
 
 	DataService      *service.DataStore
 	Authenticator    *auth.Service
-	Cache            cache.LoadingCache
+	Cache            LoadingCache
 	ImageProxy       *proxy.Image
 	CommentFormatter *store.CommentFormatter
 	Migrator         *Migrator
 	NotifyService    *notify.Service
+	TelegramService  telegramService
 	ImageService     *image.Service
 
+	AnonVote        bool
 	WebRoot         string
 	RemarkURL       string
 	ReadOnlyAge     int
@@ -52,14 +56,32 @@ type Rest struct {
 		Low      int
 		Critical int
 	}
-	UpdateLimiter float64
+	UpdateLimiter       float64
+	EmailNotifications  bool
+	TelegramBotUsername string
+	EmojiEnabled        bool
+	SimpleView          bool
+	ProxyCORS           bool
+	SendJWTHeader       bool
+	AllowedAncestors    []string // sets Content-Security-Policy "frame-ancestors ..."
+	SubscribersOnly     bool
 
 	SSLConfig   SSLConfig
 	httpsServer *http.Server
 	httpServer  *http.Server
 	lock        sync.Mutex
 
-	adminService admin
+	pubRest   public
+	privRest  private
+	adminRest admin
+	rssRest   rss
+}
+
+// LoadingCache defines interface for caching
+type LoadingCache interface {
+	Get(key lcw.Key, fn func() ([]byte, error)) (data []byte, err error) // load from cache if found or put to cache and return
+	Flush(req lcw.FlusherRequest)                                        // evict matched records
+	Close() error
 }
 
 const hardBodyLimit = 1024 * 64 // limit size of body
@@ -72,31 +94,36 @@ type commentsWithInfo struct {
 }
 
 // Run the lister and request's router, activate rest server
-func (s *Rest) Run(port int) {
+func (s *Rest) Run(address string, port int) {
+
+	if address == "*" {
+		address = ""
+	}
+
 	switch s.SSLConfig.SSLMode {
 	case None:
-		log.Printf("[INFO] activate http rest server on port %d", port)
+		log.Printf("[INFO] activate http rest server on %s:%d", address, port)
 
 		s.lock.Lock()
-		s.httpServer = s.makeHTTPServer(port, s.routes())
+		s.httpServer = s.makeHTTPServer(address, port, s.routes())
 		s.httpServer.ErrorLog = log.ToStdLogger(log.Default(), "WARN")
 		s.lock.Unlock()
 
 		err := s.httpServer.ListenAndServe()
 		log.Printf("[WARN] http server terminated, %s", err)
 	case Static:
-		log.Printf("[INFO] activate https server in 'static' mode on port %d", s.SSLConfig.Port)
+		log.Printf("[INFO] activate https server in 'static' mode on %s:%d", address, s.SSLConfig.Port)
 
 		s.lock.Lock()
-		s.httpsServer = s.makeHTTPSServer(s.SSLConfig.Port, s.routes())
+		s.httpsServer = s.makeHTTPSServer(address, s.SSLConfig.Port, s.routes())
 		s.httpsServer.ErrorLog = log.ToStdLogger(log.Default(), "WARN")
 
-		s.httpServer = s.makeHTTPServer(port, s.httpToHTTPSRouter())
+		s.httpServer = s.makeHTTPServer(address, port, s.httpToHTTPSRouter())
 		s.httpServer.ErrorLog = log.ToStdLogger(log.Default(), "WARN")
 		s.lock.Unlock()
 
 		go func() {
-			log.Printf("[INFO] activate http redirect server on port %d", port)
+			log.Printf("[INFO] activate http redirect server on %s:%d", address, port)
 			err := s.httpServer.ListenAndServe()
 			log.Printf("[WARN] http redirect server terminated, %s", err)
 		}()
@@ -104,14 +131,14 @@ func (s *Rest) Run(port int) {
 		err := s.httpsServer.ListenAndServeTLS(s.SSLConfig.Cert, s.SSLConfig.Key)
 		log.Printf("[WARN] https server terminated, %s", err)
 	case Auto:
-		log.Printf("[INFO] activate https server in 'auto' mode on port %d", s.SSLConfig.Port)
+		log.Printf("[INFO] activate https server in 'auto' mode on %s:%d", address, s.SSLConfig.Port)
 
 		m := s.makeAutocertManager()
 		s.lock.Lock()
-		s.httpsServer = s.makeHTTPSAutocertServer(s.SSLConfig.Port, s.routes(), m)
+		s.httpsServer = s.makeHTTPSAutocertServer(address, s.SSLConfig.Port, s.routes(), m)
 		s.httpsServer.ErrorLog = log.ToStdLogger(log.Default(), "WARN")
 
-		s.httpServer = s.makeHTTPServer(port, s.httpChallengeRouter(m))
+		s.httpServer = s.makeHTTPServer(address, port, s.httpChallengeRouter(m))
 		s.httpServer.ErrorLog = log.ToStdLogger(log.Default(), "WARN")
 
 		s.lock.Unlock()
@@ -151,39 +178,41 @@ func (s *Rest) Shutdown() {
 	s.lock.Unlock()
 }
 
-func (s *Rest) makeHTTPServer(port int, router http.Handler) *http.Server {
+func (s *Rest) makeHTTPServer(address string, port int, router http.Handler) *http.Server {
 	return &http.Server{
-		Addr:              fmt.Sprintf(":%d", port),
+		Addr:              fmt.Sprintf("%s:%d", address, port),
 		Handler:           router,
 		ReadHeaderTimeout: 5 * time.Second,
-		WriteTimeout:      120 * time.Second, // TODO: such a long timeout needed for blocking export (backup) request
-		IdleTimeout:       30 * time.Second,
+		// WriteTimeout:      120 * time.Second, // TODO: such a long timeout needed for blocking export (backup) request
+		IdleTimeout: 30 * time.Second,
 	}
 }
 
 func (s *Rest) routes() chi.Router {
 	router := chi.NewRouter()
-	router.Use(middleware.RealIP, R.Recoverer(log.Default()))
-	router.Use(middleware.Throttle(1000), middleware.Timeout(60*time.Second))
+	router.Use(middleware.Throttle(1000), middleware.RealIP, R.Recoverer(log.Default()))
 	router.Use(R.AppInfo("remark42", "umputun", s.Version), R.Ping)
 
-	s.adminService = admin{
-		dataService:   s.DataService,
-		migrator:      s.Migrator,
-		cache:         s.Cache,
-		authenticator: s.Authenticator,
-		readOnlyAge:   s.ReadOnlyAge,
+	s.pubRest, s.privRest, s.adminRest, s.rssRest = s.controllerGroups() // assign controllers for groups
+
+	if s.ProxyCORS {
+		log.Printf("[WARN] internal CORS disabled")
+	} else {
+		corsMiddleware := cors.New(cors.Options{
+			AllowedOrigins:   []string{"*"},
+			AllowedMethods:   []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
+			AllowedHeaders:   []string{"Accept", "Authorization", "Content-Type", "X-XSRF-Token", "X-JWT"},
+			ExposedHeaders:   []string{"Authorization"},
+			AllowCredentials: true,
+			MaxAge:           300,
+		})
+		router.Use(corsMiddleware.Handler)
 	}
 
-	corsMiddleware := cors.New(cors.Options{
-		AllowedOrigins:   []string{"*"},
-		AllowedMethods:   []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
-		AllowedHeaders:   []string{"Accept", "Authorization", "Content-Type", "X-XSRF-Token", "X-JWT"},
-		ExposedHeaders:   []string{"Authorization"},
-		AllowCredentials: true,
-		MaxAge:           300,
-	})
-	router.Use(corsMiddleware.Handler)
+	if len(s.AllowedAncestors) > 0 {
+		log.Printf("[INFO] allowed from %+v only", s.AllowedAncestors)
+		router.Use(frameAncestors(s.AllowedAncestors))
+	}
 
 	ipFn := func(ip string) string { return store.HashValue(ip, s.SharedSecret)[:12] } // logger uses it for anonymization
 	logInfoWithBody := logger.New(logger.Log(log.Default()), logger.WithBody, logger.IPfn(ipFn), logger.Prefix("[INFO]")).Handler
@@ -191,12 +220,14 @@ func (s *Rest) routes() chi.Router {
 	authHandler, avatarHandler := s.Authenticator.Handlers()
 
 	router.Group(func(r chi.Router) {
-		r.Use(logInfoWithBody, tollbooth_chi.LimitHandler(tollbooth.NewLimiter(5, nil)), middleware.NoCache)
+		r.Use(middleware.Timeout(5 * time.Second))
+		r.Use(logInfoWithBody, tollbooth_chi.LimitHandler(tollbooth.NewLimiter(10, nil)), middleware.NoCache)
 		r.Mount("/auth", authHandler)
 	})
 
 	router.Group(func(r chi.Router) {
-		r.Use(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(100, nil)), middleware.NoCache)
+		r.Use(middleware.Timeout(5 * time.Second))
+		r.Use(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(100, nil)))
 		r.Mount("/avatar", avatarHandler)
 	})
 
@@ -206,140 +237,163 @@ func (s *Rest) routes() chi.Router {
 	router.Route("/api/v1", func(rapi chi.Router) {
 
 		rapi.Group(func(rava chi.Router) {
+			rava.Use(middleware.Timeout(5 * time.Second))
 			rava.Use(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(100, nil)))
-			rava.Use(middleware.NoCache)
 			rava.Mount("/avatar", avatarHandler)
 		})
 
 		// open routes
 		rapi.Group(func(ropen chi.Router) {
+			ropen.Use(middleware.Timeout(30 * time.Second))
 			ropen.Use(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(10, nil)))
 			ropen.Use(authMiddleware.Trace, middleware.NoCache, logInfoWithBody)
-			ropen.Get("/find", s.findCommentsCtrl)
-			ropen.Get("/id/{id}", s.commentByIDCtrl)
-			ropen.Get("/comments", s.findUserCommentsCtrl)
-			ropen.Get("/last/{limit}", s.lastCommentsCtrl)
-			ropen.Get("/count", s.countCtrl)
-			ropen.Post("/counts", s.countMultiCtrl)
-			ropen.Get("/list", s.listCtrl)
 			ropen.Get("/config", s.configCtrl)
-			ropen.Post("/preview", s.previewCommentCtrl)
-			ropen.Get("/info", s.infoCtrl)
+			ropen.Get("/find", s.pubRest.findCommentsCtrl)
+			ropen.Get("/id/{id}", s.pubRest.commentByIDCtrl)
+			ropen.Get("/comments", s.pubRest.findUserCommentsCtrl)
+			ropen.Get("/last/{limit}", s.pubRest.lastCommentsCtrl)
+			ropen.Get("/count", s.pubRest.countCtrl)
+			ropen.Post("/counts", s.pubRest.countMultiCtrl)
+			ropen.Get("/list", s.pubRest.listCtrl)
+			ropen.Get("/info", s.pubRest.infoCtrl)
 			ropen.Get("/img", s.ImageProxy.Handler)
 
 			ropen.Route("/rss", func(rrss chi.Router) {
-				rrss.Get("/post", s.rssPostCommentsCtrl)
-				rrss.Get("/site", s.rssSiteCommentsCtrl)
-				rrss.Get("/reply", s.rssRepliesCtrl)
+				rrss.Get("/post", s.rssRest.postCommentsCtrl)
+				rrss.Get("/site", s.rssRest.siteCommentsCtrl)
+				rrss.Get("/reply", s.rssRest.repliesCtrl)
 			})
+
 		})
 
 		// open routes, cached
 		rapi.Group(func(ropen chi.Router) {
+			ropen.Use(middleware.Timeout(30 * time.Second))
 			ropen.Use(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(10, nil)))
 			ropen.Use(authMiddleware.Trace, logInfoWithBody)
-			ropen.Get("/picture/{user}/{id}", s.loadPictureCtrl)
+			ropen.Get("/picture/{user}/{id}", s.pubRest.loadPictureCtrl)
 		})
 
 		// protected routes, require auth
 		rapi.Group(func(rauth chi.Router) {
+			rauth.Use(middleware.Timeout(30 * time.Second))
 			rauth.Use(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(10, nil)))
-			rauth.Use(authMiddleware.Auth, middleware.NoCache, logInfoWithBody)
-			rauth.Get("/user", s.userInfoCtrl)
-			rauth.Get("/userdata", s.userAllDataCtrl)
+			rauth.Use(authMiddleware.Auth, matchSiteID, middleware.NoCache, logInfoWithBody)
+			rauth.Get("/user", s.privRest.userInfoCtrl)
+			rauth.Get("/userdata", s.privRest.userAllDataCtrl)
 		})
 
 		// admin routes, require auth and admin users only
 		rapi.Route("/admin", func(radmin chi.Router) {
+			radmin.Use(middleware.Timeout(30 * time.Second))
 			radmin.Use(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(10, nil)))
-			radmin.Use(authMiddleware.Auth, authMiddleware.AdminOnly)
+			radmin.Use(authMiddleware.Auth, authMiddleware.AdminOnly, matchSiteID)
 			radmin.Use(middleware.NoCache, logInfoWithBody)
 
-			radmin.Delete("/comment/{id}", s.adminService.deleteCommentCtrl)
-			radmin.Put("/user/{userid}", s.adminService.setBlockCtrl)
-			radmin.Delete("/user/{userid}", s.adminService.deleteUserCtrl)
-			radmin.Get("/user/{userid}", s.adminService.getUserInfoCtrl)
-			radmin.Get("/deleteme", s.adminService.deleteMeRequestCtrl)
-			radmin.Put("/verify/{userid}", s.adminService.setVerifyCtrl)
-			radmin.Put("/pin/{id}", s.adminService.setPinCtrl)
-			radmin.Get("/blocked", s.adminService.blockedUsersCtrl)
-			radmin.Put("/readonly", s.adminService.setReadOnlyCtrl)
-			radmin.Put("/title/{id}", s.adminService.setTitleCtrl)
+			radmin.Delete("/comment/{id}", s.adminRest.deleteCommentCtrl)
+			radmin.Put("/user/{userid}", s.adminRest.setBlockCtrl)
+			radmin.Delete("/user/{userid}", s.adminRest.deleteUserCtrl)
+			radmin.Get("/user/{userid}", s.adminRest.getUserInfoCtrl)
+			radmin.Get("/deleteme", s.adminRest.deleteMeRequestCtrl)
+			radmin.Put("/verify/{userid}", s.adminRest.setVerifyCtrl)
+			radmin.Put("/pin/{id}", s.adminRest.setPinCtrl)
+			radmin.Get("/blocked", s.adminRest.blockedUsersCtrl)
+			radmin.Put("/readonly", s.adminRest.setReadOnlyCtrl)
+			radmin.Put("/title/{id}", s.adminRest.setTitleCtrl)
 
 			// migrator
-			radmin.Get("/export", s.adminService.migrator.exportCtrl)
-			radmin.Post("/import", s.adminService.migrator.importCtrl)
-			radmin.Post("/import/form", s.adminService.migrator.importFormCtrl)
-			radmin.Get("/import/wait", s.adminService.migrator.importWaitCtrl)
+			radmin.Get("/export", s.adminRest.migrator.exportCtrl)
+			radmin.Post("/import", s.adminRest.migrator.importCtrl)
+			radmin.Post("/import/form", s.adminRest.migrator.importFormCtrl)
+			radmin.Post("/remap", s.adminRest.migrator.remapCtrl)
+			radmin.Get("/wait", s.adminRest.migrator.waitCtrl)
 		})
 
 		// protected routes, throttled to 10/s by default, controlled by external UpdateLimiter param
 		rapi.Group(func(rauth chi.Router) {
+			rauth.Use(middleware.Timeout(10 * time.Second))
 			rauth.Use(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(s.updateLimiter(), nil)))
-			rauth.Use(authMiddleware.Auth)
-			rauth.Use(middleware.NoCache)
-			rauth.Use(logger.New(logger.Log(log.Default()), logger.WithBody, logger.Prefix("[DEBUG]"), logger.IPfn(ipFn)).Handler)
+			rauth.Use(authMiddleware.Auth, matchSiteID, subscribersOnly(s.SubscribersOnly))
+			rauth.Use(middleware.NoCache, logInfoWithBody)
 
-			rauth.Put("/comment/{id}", s.updateCommentCtrl)
-			rauth.Post("/comment", s.createCommentCtrl)
-			rauth.With(rejectAnonUser).Put("/vote/{id}", s.voteCtrl)
-			rauth.With(rejectAnonUser).Post("/deleteme", s.deleteMeCtrl)
+			rauth.Put("/comment/{id}", s.privRest.updateCommentCtrl)
+			rauth.Post("/preview", s.privRest.previewCommentCtrl)
+			rauth.Post("/comment", s.privRest.createCommentCtrl)
+			rauth.Put("/vote/{id}", s.privRest.voteCtrl)
+			rauth.With(rejectAnonUser).Post("/deleteme", s.privRest.deleteMeCtrl)
+			rauth.With(rejectAnonUser).Get("/email", s.privRest.getEmailCtrl)
+			rauth.With(rejectAnonUser).Post("/email/subscribe", s.privRest.sendEmailConfirmationCtrl)
+			rauth.With(rejectAnonUser).Post("/email/confirm", s.privRest.setConfirmedEmailCtrl)
+			rauth.With(rejectAnonUser).Delete("/email", s.privRest.deleteEmailCtrl)
+			rauth.With(rejectAnonUser).Get("/telegram/subscribe", s.privRest.telegramSubscribeCtrl)
+			rauth.With(rejectAnonUser).Delete("/telegram", s.privRest.deleteTelegramCtrl)
 		})
 
+		// protected routes, anonymous rejected
 		rapi.Group(func(rauth chi.Router) {
+			rauth.Use(middleware.Timeout(10 * time.Second))
 			rauth.Use(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(s.updateLimiter(), nil)))
-			rauth.Use(authMiddleware.Auth, rejectAnonUser)
+			rauth.Use(authMiddleware.Auth, rejectAnonUser, matchSiteID)
 			rauth.Use(logger.New(logger.Log(log.Default()), logger.Prefix("[DEBUG]"), logger.IPfn(ipFn)).Handler)
-			rauth.Post("/picture", s.savePictureCtrl)
+			rauth.Post("/picture", s.privRest.savePictureCtrl)
 		})
 
 	})
 
 	// open routes on root level
 	router.Group(func(rroot chi.Router) {
-		tollbooth_chi.LimitHandler(tollbooth.NewLimiter(50, nil))
-		rroot.Get("/index.html", s.getStartedCtrl)
-		rroot.Get("/robots.txt", s.getRobotsCtrl)
+		rroot.Use(middleware.Timeout(10 * time.Second))
+		rroot.Use(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(50, nil)))
+		rroot.Get("/index.html", s.pubRest.getStartedCtrl)
+		rroot.Get("/robots.txt", s.pubRest.robotsCtrl)
+		rroot.Get("/email/unsubscribe.html", s.privRest.emailUnsubscribeCtrl)
+		rroot.Post("/email/unsubscribe.html", s.privRest.emailUnsubscribeCtrl)
 	})
 
 	// file server for static content from /web
-	addFileServer(router, "/web", http.Dir(s.WebRoot))
+	addFileServer(router, "/web", http.Dir(s.WebRoot), s.Version)
 	return router
 }
 
-func (s *Rest) alterComments(comments []store.Comment, r *http.Request) (res []store.Comment) {
+func (s *Rest) controllerGroups() (public, private, admin, rss) {
 
-	res = s.adminService.alterComments(comments, r) // apply admin's alteration
-
-	// prepare vote info for client view
-	vote := func(c store.Comment, r *http.Request) store.Comment {
-
-		c.Vote = 0 // default is "none" (not voted)
-
-		user, err := rest.GetUserInfo(r)
-		if err != nil {
-			c.Votes = nil // hide voters list and don't set Vote for non-authed user
-			return c
-		}
-
-		if v, ok := c.Votes[user.ID]; ok {
-			if v {
-				c.Vote = 1
-			} else {
-				c.Vote = -1
-			}
-		}
-
-		c.Votes = nil // hide voters list
-		return c
+	pubGrp := public{
+		dataService:      s.DataService,
+		cache:            s.Cache,
+		imageService:     s.ImageService,
+		commentFormatter: s.CommentFormatter,
+		readOnlyAge:      s.ReadOnlyAge,
+		webRoot:          s.WebRoot,
 	}
 
-	for i, c := range res {
-		c = vote(c, r)
-		res[i] = c
+	privGrp := private{
+		dataService:      s.DataService,
+		cache:            s.Cache,
+		imageService:     s.ImageService,
+		commentFormatter: s.CommentFormatter,
+		readOnlyAge:      s.ReadOnlyAge,
+		authenticator:    s.Authenticator,
+		notifyService:    s.NotifyService,
+		telegramService:  s.TelegramService,
+		remarkURL:        s.RemarkURL,
+		anonVote:         s.AnonVote,
+		templates:        templates.NewFS(),
 	}
 
-	return res
+	admGrp := admin{
+		dataService:   s.DataService,
+		migrator:      s.Migrator,
+		cache:         s.Cache,
+		authenticator: s.Authenticator,
+		readOnlyAge:   s.ReadOnlyAge,
+	}
+
+	rssGrp := rss{
+		dataService: s.DataService,
+		cache:       s.Cache,
+	}
+
+	return pubGrp, privGrp, admGrp, rssGrp
 }
 
 // updateLimiter returns UpdateLimiter if set, or 10 if not
@@ -351,8 +405,68 @@ func (s *Rest) updateLimiter() float64 {
 	return lmt
 }
 
+// GET /config?site=siteID - returns configuration
+func (s *Rest) configCtrl(w http.ResponseWriter, r *http.Request) {
+	siteID := r.URL.Query().Get("site")
+
+	admins, _ := s.DataService.AdminStore.Admins(siteID)
+	emails, _ := s.DataService.AdminStore.Email(siteID)
+
+	cnf := struct {
+		Version             string   `json:"version"`
+		EditDuration        int      `json:"edit_duration"`
+		AdminEdit           bool     `json:"admin_edit"`
+		MaxCommentSize      int      `json:"max_comment_size"`
+		Admins              []string `json:"admins"`
+		AdminEmail          string   `json:"admin_email"`
+		Auth                []string `json:"auth_providers"`
+		AnonVote            bool     `json:"anon_vote"`
+		LowScore            int      `json:"low_score"`
+		CriticalScore       int      `json:"critical_score"`
+		PositiveScore       bool     `json:"positive_score"`
+		ReadOnlyAge         int      `json:"readonly_age"`
+		MaxImageSize        int      `json:"max_image_size"`
+		EmailNotifications  bool     `json:"email_notifications"`
+		TelegramBotUsername string   `json:"telegram_bot_username"`
+		EmojiEnabled        bool     `json:"emoji_enabled"`
+		SimpleView          bool     `json:"simple_view"`
+		SendJWTHeader       bool     `json:"send_jwt_header"`
+		SubscribersOnly     bool     `json:"subscribers_only"`
+	}{
+		Version:             s.Version,
+		EditDuration:        int(s.DataService.EditDuration.Seconds()),
+		AdminEdit:           s.DataService.AdminEdits,
+		MaxCommentSize:      s.DataService.MaxCommentSize,
+		Admins:              admins,
+		AdminEmail:          emails,
+		LowScore:            s.ScoreThresholds.Low,
+		CriticalScore:       s.ScoreThresholds.Critical,
+		PositiveScore:       s.DataService.PositiveScore,
+		ReadOnlyAge:         s.ReadOnlyAge,
+		MaxImageSize:        s.ImageService.MaxSize,
+		EmailNotifications:  s.EmailNotifications,
+		TelegramBotUsername: s.TelegramBotUsername,
+		EmojiEnabled:        s.EmojiEnabled,
+		AnonVote:            s.AnonVote,
+		SimpleView:          s.SimpleView,
+		SendJWTHeader:       s.SendJWTHeader,
+		SubscribersOnly:     s.SubscribersOnly,
+	}
+
+	cnf.Auth = []string{}
+	for _, ap := range s.Authenticator.Providers() {
+		cnf.Auth = append(cnf.Auth, ap.Name())
+	}
+
+	if cnf.Admins == nil { // prevent json serialization to nil
+		cnf.Admins = []string{}
+	}
+	render.Status(r, http.StatusOK)
+	render.JSON(w, r, cnf)
+}
+
 // serves static files from /web or embedded by statik
-func addFileServer(r chi.Router, path string, root http.FileSystem) {
+func addFileServer(r chi.Router, path string, root http.FileSystem, version string) {
 
 	var webFS http.Handler
 
@@ -369,20 +483,22 @@ func addFileServer(r chi.Router, path string, root http.FileSystem) {
 	origPath := path
 	webFS = http.StripPrefix(path, webFS)
 	if path != "/" && path[len(path)-1] != '/' {
-		r.Get(path, http.RedirectHandler(path+"/", 301).ServeHTTP)
+		r.Get(path, http.RedirectHandler(path+"/", http.StatusMovedPermanently).ServeHTTP)
 		path += "/"
 	}
 	path += "*"
 
-	r.With(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(20, nil))).
-		Get(path, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			// don't show dirs, just serve files
-			if strings.HasSuffix(r.URL.Path, "/") && len(r.URL.Path) > 1 && r.URL.Path != (origPath+"/") {
-				http.NotFound(w, r)
-				return
-			}
-			webFS.ServeHTTP(w, r)
-		}))
+	r.With(tollbooth_chi.LimitHandler(tollbooth.NewLimiter(20, nil)),
+		middleware.Timeout(10*time.Second),
+		cacheControl(time.Hour, version),
+	).Get(path, func(w http.ResponseWriter, r *http.Request) {
+		// don't show dirs, just serve files
+		if strings.HasSuffix(r.URL.Path, "/") && len(r.URL.Path) > 1 && r.URL.Path != (origPath+"/") {
+			http.NotFound(w, r)
+			return
+		}
+		webFS.ServeHTTP(w, r)
+	})
 }
 
 func encodeJSONWithHTML(v interface{}) ([]byte, error) {
@@ -448,3 +564,116 @@ func rejectAnonUser(next http.Handler) http.Handler {
 	}
 	return http.HandlerFunc(fn)
 }
+
+// matchSiteID is a middleware rejecting users with mismatch between site param and and User.SiteID
+func matchSiteID(next http.Handler) http.Handler {
+	fn := func(w http.ResponseWriter, r *http.Request) {
+		user, err := rest.GetUserInfo(r)
+		if err != nil {
+			http.Error(w, "Unauthorized", http.StatusUnauthorized)
+			return
+		}
+
+		// skip for basic auth user
+		if user.Name == "admin" && user.ID == "admin" {
+			next.ServeHTTP(w, r)
+			return
+		}
+
+		siteID := r.URL.Query().Get("site")
+		if siteID != "" && user.SiteID != siteID {
+			http.Error(w, "Access denied", http.StatusForbidden)
+			return
+		}
+		next.ServeHTTP(w, r)
+	}
+	return http.HandlerFunc(fn)
+}
+
+// cacheControl is a middleware setting cache expiration. Using url+version as etag
+func cacheControl(expiration time.Duration, version string) func(http.Handler) http.Handler {
+
+	etag := func(r *http.Request, version string) string {
+		s := version + ":" + r.URL.String()
+		return store.EncodeID(s)
+	}
+
+	return func(h http.Handler) http.Handler {
+		fn := func(w http.ResponseWriter, r *http.Request) {
+			e := `"` + etag(r, version) + `"`
+			w.Header().Set("Etag", e)
+			w.Header().Set("Cache-Control", fmt.Sprintf("max-age=%d, no-cache", int(expiration.Seconds())))
+
+			if match := r.Header.Get("If-None-Match"); match != "" {
+				if strings.Contains(match, e) {
+					w.WriteHeader(http.StatusNotModified)
+					return
+				}
+			}
+			h.ServeHTTP(w, r)
+		}
+		return http.HandlerFunc(fn)
+	}
+}
+
+// frameAncestors is a middleware setting Content-Security-Policy "frame-ancestors host1 host2 ..."
+// prevents loading of comments widgets from any other origins. In case if the list of allowed empty, ignored.
+func frameAncestors(hosts []string) func(http.Handler) http.Handler {
+	return func(h http.Handler) http.Handler {
+		fn := func(w http.ResponseWriter, r *http.Request) {
+			if len(hosts) == 0 {
+				h.ServeHTTP(w, r)
+				return
+			}
+			w.Header().Set("Content-Security-Policy", "frame-ancestors "+strings.Join(hosts, " ")+";")
+			h.ServeHTTP(w, r)
+		}
+		return http.HandlerFunc(fn)
+	}
+}
+
+// subscribersOnly is a middleware rejecting non-paid_sub users
+func subscribersOnly(enable bool) func(http.Handler) http.Handler {
+	return func(h http.Handler) http.Handler {
+		fn := func(w http.ResponseWriter, r *http.Request) {
+			if enable {
+				user, err := rest.GetUserInfo(r)
+				if err != nil {
+					http.Error(w, "Unauthorized", http.StatusUnauthorized)
+					return
+				}
+				if !user.PaidSub {
+					http.Error(w, "Access denied", http.StatusForbidden)
+					return
+				}
+			}
+			h.ServeHTTP(w, r)
+		}
+		return http.HandlerFunc(fn)
+	}
+}
+
+func parseError(err error, defaultCode int) (code int) {
+	code = defaultCode
+
+	switch {
+	// voting errors
+	case strings.Contains(err.Error(), "can not vote for his own comment"):
+		code = rest.ErrVoteSelf
+	case strings.Contains(err.Error(), "already voted for"):
+		code = rest.ErrVoteDbl
+	case strings.Contains(err.Error(), "maximum number of votes exceeded for comment"):
+		code = rest.ErrVoteMax
+	case strings.Contains(err.Error(), "minimal score reached for comment"):
+		code = rest.ErrVoteMinScore
+
+	// edit errors
+	case strings.HasPrefix(err.Error(), "too late to edit"):
+		code = rest.ErrCommentEditExpired
+	case strings.HasPrefix(err.Error(), "parent comment with reply can't be edited"):
+		code = rest.ErrCommentEditChanged
+
+	}
+
+	return code
+}

backend/app/rest/api/rest_private.go

@@ -1,30 +1,111 @@
 package api
 
 import (
+	"bytes"
 	"compress/gzip"
+	"crypto/rand"
+	"crypto/sha1" //nolint:gosec //not used for security
 	"encoding/json"
-	"errors"
 	"fmt"
+	"html/template"
+	"io"
 	"net/http"
 	"strings"
 	"time"
 
-	"github.com/dgrijalva/jwt-go"
-	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
+	"github.com/go-pkgz/auth"
 	"github.com/go-pkgz/auth/token"
+	cache "github.com/go-pkgz/lcw"
 	log "github.com/go-pkgz/lgr"
 	R "github.com/go-pkgz/rest"
-	"github.com/go-pkgz/rest/cache"
+	"github.com/golang-jwt/jwt"
 	"github.com/hashicorp/go-multierror"
+	"github.com/pkg/errors"
 
-	"github.com/umputun/remark/backend/app/rest"
-	"github.com/umputun/remark/backend/app/store"
-	"github.com/umputun/remark/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/notify"
+	"github.com/umputun/remark42/backend/app/rest"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/engine"
+	"github.com/umputun/remark42/backend/app/store/image"
+	"github.com/umputun/remark42/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/templates"
 )
 
+type private struct {
+	dataService      privStore
+	cache            LoadingCache
+	readOnlyAge      int
+	commentFormatter *store.CommentFormatter
+	imageService     *image.Service
+	notifyService    *notify.Service
+	authenticator    *auth.Service
+	telegramService  telegramService
+	remarkURL        string
+	anonVote         bool
+	templates        templates.FileReader
+}
+
+// telegramService is a subset of Telegram service used for setting up user telegram notifications
+type telegramService interface {
+	AddToken(token, user, site string, expires time.Time)
+	CheckToken(token, userID string) (telegram, site string, err error)
+	GetBotUsername() string
+}
+
+type privStore interface {
+	Create(comment store.Comment) (commentID string, err error)
+	EditComment(locator store.Locator, commentID string, req service.EditRequest) (comment store.Comment, err error)
+	Vote(req service.VoteReq) (comment store.Comment, err error)
+	Get(locator store.Locator, commentID string, user store.User) (store.Comment, error)
+	User(siteID, userID string, limit, skip int, user store.User) ([]store.Comment, error)
+	GetUserEmail(siteID string, userID string) (string, error)
+	SetUserEmail(siteID string, userID string, value string) (string, error)
+	GetUserTelegram(siteID string, userID string) (string, error)
+	SetUserTelegram(siteID string, userID string, value string) (string, error)
+	DeleteUserDetail(siteID string, userID string, detail engine.UserDetail) error
+	ValidateComment(c *store.Comment) error
+	IsVerified(siteID string, userID string) bool
+	IsReadOnly(locator store.Locator) bool
+	IsBlocked(siteID string, userID string) bool
+	Info(locator store.Locator, readonlyAge int) (store.PostInfo, error)
+}
+
+// POST /preview, body is a comment, returns rendered html
+func (s *private) previewCommentCtrl(w http.ResponseWriter, r *http.Request) {
+	user := rest.MustGetUserInfo(r)
+
+	comment := store.Comment{}
+	if err := render.DecodeJSON(http.MaxBytesReader(w, r.Body, hardBodyLimit), &comment); err != nil {
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't bind comment", rest.ErrDecode)
+		return
+	}
+
+	comment.User = user
+	comment.Orig = comment.Text
+	if err := s.dataService.ValidateComment(&comment); err != nil {
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "invalid comment", rest.ErrCommentValidation)
+		return
+	}
+
+	comment = s.commentFormatter.Format(comment)
+	comment.Sanitize()
+
+	// check if images are valid
+	for _, id := range s.imageService.ExtractPictures(comment.Text) {
+		err := s.imageService.ResetCleanupTimer(id)
+		if err != nil {
+			rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't renew staged picture cleanup timer", rest.ErrImgNotFound)
+			return
+		}
+	}
+
+	render.HTML(w, r, comment.Text)
+}
+
 // POST /comment - adds comment, resets all immutable fields
-func (s *Rest) createCommentCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *private) createCommentCtrl(w http.ResponseWriter, r *http.Request) {
 
 	comment := store.Comment{}
 	if err := render.DecodeJSON(http.MaxBytesReader(w, r.Body, hardBodyLimit), &comment); err != nil {
@@ -33,20 +114,35 @@ func (s *Rest) createCommentCtrl(w http.ResponseWriter, r *http.Request) {
 	}
 
 	user := rest.MustGetUserInfo(r)
+	if user.ID != "admin" && user.SiteID != comment.Locator.SiteID {
+		rest.SendErrorJSON(w, r, http.StatusForbidden,
+			fmt.Errorf("site mismatch, %q not allowed to post to %s", user.SiteID, comment.Locator.SiteID), "invalid site",
+			rest.ErrCommentValidation)
+		return
+	}
 
 	comment.PrepareUntrusted() // clean all fields user not supposed to set
 	comment.User = user
 	comment.User.IP = strings.Split(r.RemoteAddr, ":")[0]
 
 	comment.Orig = comment.Text // original comment text, prior to md render
-	if err := s.DataService.ValidateComment(&comment); err != nil {
+	if err := s.dataService.ValidateComment(&comment); err != nil {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "invalid comment", rest.ErrCommentValidation)
 		return
 	}
-	comment = s.CommentFormatter.Format(comment)
+	comment = s.commentFormatter.Format(comment)
+
+	// check if images are valid
+	for _, id := range s.imageService.ExtractPictures(comment.Text) {
+		_, err := s.imageService.Load(id)
+		if err != nil {
+			rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't load picture from the comment", rest.ErrImgNotFound)
+			return
+		}
+	}
 
 	// check if user blocked
-	if s.adminService.checkBlocked(comment.Locator.SiteID, comment.User) {
+	if s.dataService.IsBlocked(comment.Locator.SiteID, comment.User.ID) {
 		rest.SendErrorJSON(w, r, http.StatusForbidden, errors.New("rejected"), "user blocked", rest.ErrUserBlocked)
 		return
 	}
@@ -56,9 +152,9 @@ func (s *Rest) createCommentCtrl(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	id, err := s.DataService.Create(comment)
+	id, err := s.dataService.Create(comment)
 	if err == service.ErrRestrictedWordsFound {
-		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "invalid comment", rest.ErrCommentValidation)
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "invalid comment", rest.ErrCommentRestrictWords)
 		return
 	}
 	if err != nil {
@@ -66,17 +162,17 @@ func (s *Rest) createCommentCtrl(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// DataService modifies comment
-	finalComment, err := s.DataService.Get(comment.Locator, id)
+	// dataService modifies comment
+	finalComment, err := s.dataService.Get(comment.Locator, id, rest.GetUserOrEmpty(r))
 	if err != nil {
 		rest.SendErrorJSON(w, r, http.StatusInternalServerError, err, "can't load created comment", rest.ErrInternal)
 		return
 	}
-	s.Cache.Flush(cache.Flusher(comment.Locator.SiteID).
+	s.cache.Flush(cache.Flusher(comment.Locator.SiteID).
 		Scopes(comment.Locator.URL, lastCommentsScope, comment.User.ID, comment.Locator.SiteID))
 
-	if s.NotifyService != nil {
-		s.NotifyService.Submit(finalComment)
+	if s.notifyService != nil {
+		s.notifyService.Submit(notify.Request{Comment: finalComment})
 	}
 
 	log.Printf("[DEBUG] created commend %+v", finalComment)
@@ -86,7 +182,7 @@ func (s *Rest) createCommentCtrl(w http.ResponseWriter, r *http.Request) {
 }
 
 // PUT /comment/{id}?site=siteID&url=post-url - update comment
-func (s *Rest) updateCommentCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *private) updateCommentCtrl(w http.ResponseWriter, r *http.Request) {
 
 	edit := struct {
 		Text    string
@@ -107,7 +203,7 @@ func (s *Rest) updateCommentCtrl(w http.ResponseWriter, r *http.Request) {
 
 	var currComment store.Comment
 	var err error
-	if currComment, err = s.DataService.Get(locator, id); err != nil {
+	if currComment, err = s.dataService.Get(locator, id, rest.GetUserOrEmpty(r)); err != nil {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't find comment", rest.ErrCommentNotFound)
 		return
 	}
@@ -119,41 +215,54 @@ func (s *Rest) updateCommentCtrl(w http.ResponseWriter, r *http.Request) {
 	}
 
 	editReq := service.EditRequest{
-		Text:    s.CommentFormatter.FormatText(edit.Text),
+		Text:    s.commentFormatter.FormatText(edit.Text),
 		Orig:    edit.Text,
 		Summary: edit.Summary,
 		Delete:  edit.Delete,
+		Admin:   user.Admin,
 	}
 
-	res, err := s.DataService.EditComment(locator, id, editReq)
+	res, err := s.dataService.EditComment(locator, id, editReq)
 	if err == service.ErrRestrictedWordsFound {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "invalid comment", rest.ErrCommentValidation)
 		return
 	}
 
 	if err != nil {
-		code := s.parseError(err, rest.ErrCommentRejected)
+		code := parseError(err, rest.ErrCommentRejected)
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't update comment", code)
 		return
 	}
 
-	s.Cache.Flush(cache.Flusher(locator.SiteID).Scopes(locator.SiteID, locator.URL, lastCommentsScope, user.ID))
+	s.cache.Flush(cache.Flusher(locator.SiteID).Scopes(locator.SiteID, locator.URL, lastCommentsScope, user.ID))
 	render.JSON(w, r, res)
 }
 
 // GET /user?site=siteID - returns user info
-func (s *Rest) userInfoCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *private) userInfoCtrl(w http.ResponseWriter, r *http.Request) {
 	user := rest.MustGetUserInfo(r)
 	if siteID := r.URL.Query().Get("site"); siteID != "" {
-		user.Verified = s.DataService.IsVerified(siteID, user.ID)
+		user.Verified = s.dataService.IsVerified(siteID, user.ID)
+
+		email, err := s.dataService.GetUserEmail(siteID, user.ID)
+		if err != nil {
+			log.Printf("[WARN] can't read email for %s, %v", user.ID, err)
+		}
+		if len(email) > 0 {
+			user.EmailSubscription = true
+		}
 	}
 
 	render.JSON(w, r, user)
 }
 
 // PUT /vote/{id}?site=siteID&url=post-url&vote=1 - vote for/against comment
-func (s *Rest) voteCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *private) voteCtrl(w http.ResponseWriter, r *http.Request) {
 	user := rest.MustGetUserInfo(r)
+	if !s.anonVote && strings.HasPrefix(user.ID, "anonymous_") {
+		http.Error(w, "Access denied", http.StatusForbidden)
+		return
+	}
 	locator := store.Locator{SiteID: r.URL.Query().Get("site"), URL: r.URL.Query().Get("url")}
 	id := chi.URLParam(r, "id")
 	log.Printf("[DEBUG] vote for comment %s", id)
@@ -166,23 +275,336 @@ func (s *Rest) voteCtrl(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// check if user blocked
-	if s.adminService.checkBlocked(locator.SiteID, user) {
+	if s.dataService.IsBlocked(locator.SiteID, user.ID) {
 		rest.SendErrorJSON(w, r, http.StatusForbidden, errors.New("rejected"), "user blocked", rest.ErrUserBlocked)
 		return
 	}
 
-	comment, err := s.DataService.Vote(locator, id, user.ID, vote)
+	req := service.VoteReq{
+		Locator:   locator,
+		CommentID: id,
+		UserID:    user.ID,
+		UserIP:    strings.Split(r.RemoteAddr, ":")[0],
+		Val:       vote,
+	}
+	comment, err := s.dataService.Vote(req)
 	if err != nil {
-		code := s.parseError(err, rest.ErrVoteRejected)
+		code := parseError(err, rest.ErrVoteRejected)
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't vote for comment", code)
 		return
 	}
-	s.Cache.Flush(cache.Flusher(locator.SiteID).Scopes(locator.URL, comment.User.ID))
+	s.cache.Flush(cache.Flusher(locator.SiteID).Scopes(locator.URL, comment.User.ID))
 	render.JSON(w, r, R.JSON{"id": comment.ID, "score": comment.Score})
 }
 
+// getEmailCtrl gets email address for authenticated user.
+// GET /email?site=siteID
+func (s *private) getEmailCtrl(w http.ResponseWriter, r *http.Request) {
+	user := rest.MustGetUserInfo(r)
+	siteID := r.URL.Query().Get("site")
+	address, err := s.dataService.GetUserEmail(siteID, user.ID)
+	if err != nil {
+		log.Printf("[WARN] can't read email for %s, %v", user.ID, err)
+	}
+
+	render.JSON(w, r, R.JSON{"user": user, "address": address})
+}
+
+// sendEmailConfirmationCtrl gets address and siteID from query, makes confirmation token and sends it to user.
+// GET /email/subscribe?site=siteID&address=someone@example.com
+//nolint:dupl // too hard to deduplicate that logic, as then it's tricky to use SendErrorJSON
+func (s *private) sendEmailConfirmationCtrl(w http.ResponseWriter, r *http.Request) {
+	user := rest.MustGetUserInfo(r)
+	address := r.URL.Query().Get("address")
+	siteID := r.URL.Query().Get("site")
+	if address == "" {
+		rest.SendErrorJSON(w, r, http.StatusBadRequest,
+			errors.New("missing parameter"), "address parameter is required", rest.ErrInternal)
+		return
+	}
+	existingAddress, err := s.dataService.GetUserEmail(siteID, user.ID)
+	if err != nil {
+		log.Printf("[WARN] can't read email for %s, %v", user.ID, err)
+	}
+	if address == existingAddress {
+		rest.SendErrorJSON(w, r, http.StatusConflict,
+			errors.New("already verified"), "email address is already verified for this user", rest.ErrInternal)
+		return
+	}
+	claims := token.Claims{
+		Handshake: &token.Handshake{ID: user.ID + "::" + address},
+		StandardClaims: jwt.StandardClaims{
+			Audience:  r.URL.Query().Get("site"),
+			ExpiresAt: time.Now().Add(30 * time.Minute).Unix(),
+			NotBefore: time.Now().Add(-1 * time.Minute).Unix(),
+			Issuer:    "remark42",
+		},
+	}
+
+	tkn, err := s.authenticator.TokenService().Token(claims)
+	if err != nil {
+		rest.SendErrorJSON(w, r, http.StatusForbidden, err, "failed to make verification token", rest.ErrInternal)
+		return
+	}
+
+	s.notifyService.SubmitVerification(
+		notify.VerificationRequest{
+			SiteID: siteID,
+			User:   user.Name,
+			Email:  address,
+			Token:  tkn,
+		},
+	)
+
+	render.JSON(w, r, R.JSON{"user": user, "address": address})
+}
+
+// telegramSubscribeCtrl generates and verifies telegram notification request
+// GET /telegram/subscribe?site=siteID<&tkn=token>
+func (s *private) telegramSubscribeCtrl(w http.ResponseWriter, r *http.Request) {
+	user := rest.MustGetUserInfo(r)
+
+	if s.telegramService == nil {
+		rest.SendErrorJSON(w, r, http.StatusInternalServerError,
+			errors.New("not enabled"), "telegram notifications are not enabled", rest.ErrActionRejected)
+		return
+	}
+
+	queryToken := r.URL.Query().Get("tkn")
+	if queryToken == "" {
+		// GET /telegram/subscribe?site=siteID (No token supplied)
+		siteID := r.URL.Query().Get("site")
+		if siteID == "" {
+			rest.SendErrorJSON(w, r, http.StatusBadRequest, errors.New("missing parameter"), "site parameter is required", rest.ErrInternal)
+			return
+		}
+		// we don't care as much if we can't retrieve the current value of that field for the user, so ignore the error
+		if existingAddress, _ := s.dataService.GetUserTelegram(siteID, user.ID); existingAddress != "" {
+			rest.SendErrorJSON(w, r, http.StatusConflict,
+				errors.New("already subscribed"), "telegram subscription is already set for this user, delete if first to re-subscribe", rest.ErrActionRejected)
+			return
+		}
+		// Generate and send token
+		tkn, err := randToken()
+		if err != nil {
+			rest.SendErrorJSON(w, r, http.StatusForbidden, err, "failed to generate verification token", rest.ErrInternal)
+			return
+		}
+		expires := time.Now().Add(10 * time.Minute)
+
+		s.telegramService.AddToken(tkn, user.ID, siteID, expires)
+
+		render.JSON(w, r, R.JSON{"token": tkn, "bot": s.telegramService.GetBotUsername()})
+
+		return
+	}
+
+	// GET /telegram/subscribe?tkn=token (verify token)
+	var address, siteID string
+	address, siteID, err := s.telegramService.CheckToken(queryToken, user.ID)
+	if err != nil {
+		rest.SendErrorJSON(w, r, http.StatusInternalServerError, err, "can't set telegram for user", rest.ErrInternal)
+		return
+	}
+
+	log.Printf("[DEBUG] set telegram notifications for user %s", user.ID)
+
+	val, err := s.dataService.SetUserTelegram(siteID, user.ID, address)
+	if err != nil {
+		code := parseError(err, rest.ErrInternal)
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't set telegram for user", code)
+		return
+	}
+
+	render.JSON(w, r, R.JSON{"updated": true, "address": val})
+}
+
+// setConfirmedEmailCtrl uses provided token parameter (generated by sendEmailConfirmationCtrl) to set email and add it to user token
+// PUT /email/confirm?site=siteID&tkn=jwt
+func (s *private) setConfirmedEmailCtrl(w http.ResponseWriter, r *http.Request) {
+	tkn := r.URL.Query().Get("tkn")
+	if tkn == "" {
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, errors.New("missing parameter"), "token parameter is required", rest.ErrInternal)
+		return
+	}
+	user := rest.MustGetUserInfo(r)
+	siteID := r.URL.Query().Get("site")
+
+	confClaims, err := s.authenticator.TokenService().Parse(tkn)
+	if err != nil {
+		rest.SendErrorJSON(w, r, http.StatusForbidden, err, "failed to verify confirmation token", rest.ErrInternal)
+		return
+	}
+
+	if s.authenticator.TokenService().IsExpired(confClaims) {
+		rest.SendErrorJSON(w, r, http.StatusForbidden, errors.New("expired"), "failed to verify confirmation token", rest.ErrInternal)
+		return
+	}
+
+	// Handshake.ID is user.ID + "::" + address
+	elems := strings.Split(confClaims.Handshake.ID, "::")
+	if len(elems) != 2 || elems[0] != user.ID {
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, errors.New(confClaims.Handshake.ID), "invalid handshake token", rest.ErrInternal)
+		return
+	}
+	address := elems[1]
+
+	log.Printf("[DEBUG] set email for user %s", user.ID)
+
+	val, err := s.dataService.SetUserEmail(siteID, user.ID, address)
+	if err != nil {
+		code := parseError(err, rest.ErrInternal)
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't set email for user", code)
+		return
+	}
+
+	// update User.Email from the token
+	claims, _, err := s.authenticator.TokenService().Get(r)
+	if err != nil {
+		rest.SendErrorJSON(w, r, http.StatusForbidden, err, "failed to verify confirmation token", rest.ErrInternal)
+		return
+	}
+	claims.User.Email = address
+	if _, err = s.authenticator.TokenService().Set(w, claims); err != nil {
+		rest.SendErrorJSON(w, r, http.StatusInternalServerError, err, "failed to set token", rest.ErrInternal)
+		return
+	}
+	render.JSON(w, r, R.JSON{"updated": true, "address": val})
+}
+
+// POST/GET /email/unsubscribe.html?site=siteID&tkn=jwt - unsubscribe the user in token from email notifications
+func (s *private) emailUnsubscribeCtrl(w http.ResponseWriter, r *http.Request) {
+	tkn := r.URL.Query().Get("tkn")
+	if tkn == "" {
+		rest.SendErrorHTML(w, r, http.StatusBadRequest,
+			errors.New("missing parameter"), "token parameter is required", rest.ErrInternal, s.templates)
+		return
+	}
+	siteID := r.URL.Query().Get("site")
+
+	confClaims, err := s.authenticator.TokenService().Parse(tkn)
+	if err != nil {
+		rest.SendErrorHTML(w, r, http.StatusForbidden, err, "failed to verify confirmation token", rest.ErrInternal, s.templates)
+		return
+	}
+
+	if s.authenticator.TokenService().IsExpired(confClaims) {
+		rest.SendErrorHTML(w, r, http.StatusForbidden,
+			errors.New("expired"), "failed to verify confirmation token", rest.ErrInternal, s.templates)
+		return
+	}
+
+	// Handshake.ID is user.ID + "::" + address
+	elems := strings.Split(confClaims.Handshake.ID, "::")
+	if len(elems) != 2 {
+		rest.SendErrorHTML(w, r, http.StatusBadRequest,
+			errors.New(confClaims.Handshake.ID), "invalid handshake token", rest.ErrInternal, s.templates)
+		return
+	}
+	userID := elems[0]
+	address := elems[1]
+
+	existingAddress, err := s.dataService.GetUserEmail(siteID, userID)
+	if err != nil {
+		// we don't care as much if we can't retrieve the current value of that field for the user,
+		// as it's only used to check if we're trying to set to the same value it's already set to
+		log.Printf("[WARN] can't read email for %s, %v", userID, err)
+	}
+	if existingAddress == "" {
+		rest.SendErrorHTML(w, r, http.StatusConflict,
+			errors.New("user is not subscribed"), "user does not have active email subscription", rest.ErrInternal, s.templates)
+		return
+	}
+	if address != existingAddress {
+		rest.SendErrorHTML(w, r, http.StatusBadRequest,
+			errors.New("wrong email unsubscription"), "email address in request does not match known for this user",
+			rest.ErrInternal, s.templates)
+		return
+	}
+
+	log.Printf("[DEBUG] unsubscribe user %s", userID)
+
+	if err = s.dataService.DeleteUserDetail(siteID, userID, engine.UserEmail); err != nil {
+		code := parseError(err, rest.ErrInternal)
+		rest.SendErrorHTML(w, r, http.StatusBadRequest, err, "can't delete email for user", code, s.templates)
+		return
+	}
+	// clean User.Email from the token, if user has the token
+	claims, _, err := s.authenticator.TokenService().Get(r)
+	if err != nil {
+		log.Printf("[DEBUG] unsubscribed user doesn't have valid JWT token to update %s, %v", userID, err)
+	}
+	if claims.User != nil && claims.User.Email != "" {
+		claims.User.Email = ""
+		if _, err = s.authenticator.TokenService().Set(w, claims); err != nil {
+			rest.SendErrorHTML(w, r, http.StatusInternalServerError, err, "failed to set token", rest.ErrInternal, s.templates)
+			return
+		}
+	}
+
+	// MustExecute behaves like template.Execute, but panics if an error occurs.
+	MustExecute := func(tmpl *template.Template, wr io.Writer, data interface{}) {
+		if err := tmpl.Execute(wr, data); err != nil {
+			panic(err)
+		}
+	}
+	MustRead := func(path string) string {
+		file, err := s.templates.ReadFile(path)
+		if err != nil {
+			panic(err)
+		}
+		return string(file)
+	}
+	tmplstr := MustRead("unsubscribe.html.tmpl")
+	tmpl := template.Must(template.New("unsubscribe").Parse(tmplstr))
+	msg := bytes.Buffer{}
+	MustExecute(tmpl, &msg, nil)
+	render.HTML(w, r, msg.String())
+}
+
+// DELETE /email?site=siteID - removes user's email
+func (s *private) deleteEmailCtrl(w http.ResponseWriter, r *http.Request) {
+	user := rest.MustGetUserInfo(r)
+	siteID := r.URL.Query().Get("site")
+	log.Printf("[DEBUG] remove email for user %s", user.ID)
+
+	if err := s.dataService.DeleteUserDetail(siteID, user.ID, engine.UserEmail); err != nil {
+		code := parseError(err, rest.ErrInternal)
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't delete email for user", code)
+		return
+	}
+	// clean User.Email from the token
+	claims, _, err := s.authenticator.TokenService().Get(r)
+	if err != nil {
+		rest.SendErrorJSON(w, r, http.StatusForbidden, err, "failed to verify confirmation token", rest.ErrInternal)
+		return
+	}
+	if claims.User.Email != "" {
+		claims.User.Email = ""
+		if _, err = s.authenticator.TokenService().Set(w, claims); err != nil {
+			rest.SendErrorJSON(w, r, http.StatusInternalServerError, err, "failed to set token", rest.ErrInternal)
+			return
+		}
+	}
+	render.JSON(w, r, R.JSON{"deleted": true})
+}
+
+// DELETE /telegram?site=siteID - removes user's telegram
+func (s *private) deleteTelegramCtrl(w http.ResponseWriter, r *http.Request) {
+	user := rest.MustGetUserInfo(r)
+	siteID := r.URL.Query().Get("site")
+	log.Printf("[DEBUG] remove telegram for user %s", user.ID)
+
+	if err := s.dataService.DeleteUserDetail(siteID, user.ID, engine.UserTelegram); err != nil {
+		code := parseError(err, rest.ErrInternal)
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't delete telegram for user", code)
+		return
+	}
+	render.JSON(w, r, R.JSON{"deleted": true})
+}
+
 // GET /userdata?site=siteID - exports all data about the user as a json with user info and list of all comments
-func (s *Rest) userAllDataCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *private) userAllDataCtrl(w http.ResponseWriter, r *http.Request) {
 	siteID := r.URL.Query().Get("site")
 	user := rest.MustGetUserInfo(r)
 	userB, err := json.Marshal(&user)
@@ -213,7 +635,7 @@ func (s *Rest) userAllDataCtrl(w http.ResponseWriter, r *http.Request) {
 
 	// get comments in 100 in each paginated request
 	for i := 0; i < 100; i++ {
-		comments, errUser := s.DataService.User(siteID, user.ID, 100, i*100)
+		comments, errUser := s.dataService.User(siteID, user.ID, 100, i*100, rest.GetUserOrEmpty(r))
 		if errUser != nil {
 			rest.SendErrorJSON(w, r, http.StatusInternalServerError, errUser, "can't get user comments", rest.ErrInternal)
 			return
@@ -240,7 +662,7 @@ func (s *Rest) userAllDataCtrl(w http.ResponseWriter, r *http.Request) {
 
 // POST /deleteme?site_id=site - requesting delete of all user info
 // makes jwt with user info and sends it back as a part of json response
-func (s *Rest) deleteMeCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *private) deleteMeCtrl(w http.ResponseWriter, r *http.Request) {
 	user := rest.MustGetUserInfo(r)
 	siteID := r.URL.Query().Get("site")
 
@@ -260,18 +682,18 @@ func (s *Rest) deleteMeCtrl(w http.ResponseWriter, r *http.Request) {
 		},
 	}
 
-	tokenStr, err := s.Authenticator.TokenService().Token(claims)
+	tokenStr, err := s.authenticator.TokenService().Token(claims)
 	if err != nil {
 		rest.SendErrorJSON(w, r, http.StatusInternalServerError, err, "can't make token", rest.ErrInternal)
 		return
 	}
 
-	link := fmt.Sprintf("%s/web/deleteme.html?token=%s", s.RemarkURL, tokenStr)
+	link := fmt.Sprintf("%s/web/deleteme.html?token=%s", s.remarkURL, tokenStr)
 	render.JSON(w, r, R.JSON{"site": siteID, "user_id": user.ID, "token": tokenStr, "link": link})
 }
 
 // POST /image - save image with form request
-func (s *Rest) savePictureCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *private) savePictureCtrl(w http.ResponseWriter, r *http.Request) {
 	user := rest.MustGetUserInfo(r)
 
 	if err := r.ParseMultipartForm(5 * 1024 * 1024); err != nil { // 5M max memory, if bigger will make a file
@@ -279,14 +701,14 @@ func (s *Rest) savePictureCtrl(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	file, header, err := r.FormFile("file")
+	file, _, err := r.FormFile("file")
 	if err != nil {
 		rest.SendErrorJSON(w, r, http.StatusInternalServerError, err, "can't get image file from the request", rest.ErrInternal)
 		return
 	}
 	defer func() { _ = file.Close() }()
 
-	id, err := s.ImageService.Save(header.Filename, user.ID, file)
+	id, err := s.imageService.Save(user.ID, file)
 	if err != nil {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't save image", rest.ErrInternal)
 		return
@@ -295,37 +717,24 @@ func (s *Rest) savePictureCtrl(w http.ResponseWriter, r *http.Request) {
 	render.JSON(w, r, R.JSON{"id": id})
 }
 
-func (s *Rest) isReadOnly(locator store.Locator) bool {
-	if s.ReadOnlyAge > 0 {
+func (s *private) isReadOnly(locator store.Locator) bool {
+	if s.readOnlyAge > 0 {
 		// check RO by age
-		if info, e := s.DataService.Info(locator, s.ReadOnlyAge); e == nil && info.ReadOnly {
+		if info, e := s.dataService.Info(locator, s.readOnlyAge); e == nil && info.ReadOnly {
 			return true
 		}
 	}
-	return s.DataService.IsReadOnly(locator) // ro manually
+	return s.dataService.IsReadOnly(locator) // ro manually
 }
 
-func (s *Rest) parseError(err error, defaultCode int) (code int) {
-	code = defaultCode
-
-	switch {
-	// voting errors
-	case strings.Contains(err.Error(), "can not vote for his own comment"):
-		code = rest.ErrVoteSelf
-	case strings.Contains(err.Error(), "already voted for"):
-		code = rest.ErrVoteDbl
-	case strings.Contains(err.Error(), "maximum number of votes exceeded for comment"):
-		code = rest.ErrVoteMax
-	case strings.Contains(err.Error(), "minimal score reached for comment"):
-		code = rest.ErrVoteMinScore
-
-	// edit errors
-	case strings.HasPrefix(err.Error(), "too late to edit"):
-		code = rest.ErrCommentEditExpired
-	case strings.HasPrefix(err.Error(), "parent comment with reply can't be edited"):
-		code = rest.ErrCommentEditChanged
-
+func randToken() (string, error) {
+	b := make([]byte, 32)
+	if _, err := rand.Read(b); err != nil {
+		return "", errors.Wrap(err, "can't get random")
 	}
-
-	return code
+	s := sha1.New() //nolint:gosec // not used for security
+	if _, err := s.Write(b); err != nil {
+		return "", errors.Wrap(err, "can't write randoms to sha1")
+	}
+	return fmt.Sprintf("%x", s.Sum(nil)), nil
 }

backend/app/rest/api/rest_public.go

@@ -1,57 +1,98 @@
 package api
 
 import (
+	"bytes"
 	"crypto/sha1" // nolint
 	"encoding/base64"
 	"io"
-	"io/ioutil"
 	"net/http"
+	"os"
 	"path"
 	"strconv"
 	"strings"
+	"time"
 
-	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
+	cache "github.com/go-pkgz/lcw"
 	log "github.com/go-pkgz/lgr"
 	R "github.com/go-pkgz/rest"
-	"github.com/go-pkgz/rest/cache"
+	"github.com/pkg/errors"
 
-	"github.com/umputun/remark/backend/app/rest"
-	"github.com/umputun/remark/backend/app/store"
-	"github.com/umputun/remark/backend/app/store/service"
+	"github.com/umputun/remark42/backend/app/rest"
+	"github.com/umputun/remark42/backend/app/store"
+	"github.com/umputun/remark42/backend/app/store/image"
+	"github.com/umputun/remark42/backend/app/store/service"
 )
 
-// GET /find?site=siteID&url=post-url&format=[tree|plain]&sort=[+/-time|+/-score|+/-controversy ]
+type public struct {
+	dataService      pubStore
+	cache            LoadingCache
+	readOnlyAge      int
+	commentFormatter *store.CommentFormatter
+	imageService     *image.Service
+	webRoot          string
+}
+
+type pubStore interface {
+	Create(comment store.Comment) (commentID string, err error)
+	Get(locator store.Locator, commentID string, user store.User) (store.Comment, error)
+	FindSince(locator store.Locator, sort string, user store.User, since time.Time) ([]store.Comment, error)
+	Last(siteID string, limit int, since time.Time, user store.User) ([]store.Comment, error)
+	User(siteID, userID string, limit, skip int, user store.User) ([]store.Comment, error)
+	UserCount(siteID, userID string) (int, error)
+	Count(locator store.Locator) (int, error)
+	List(siteID string, limit int, skip int) ([]store.PostInfo, error)
+	Info(locator store.Locator, readonlyAge int) (store.PostInfo, error)
+
+	ValidateComment(c *store.Comment) error
+	IsReadOnly(locator store.Locator) bool
+	Counts(siteID string, postIDs []string) ([]store.PostInfo, error)
+}
+
+// GET /find?site=siteID&url=post-url&format=[tree|plain]&sort=[+/-time|+/-score|+/-controversy]&view=[user|all]&since=unix_ts_msec
 // find comments for given post. Returns in tree or plain formats, sorted
-func (s *Rest) findCommentsCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *public) findCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 	locator := store.Locator{SiteID: r.URL.Query().Get("site"), URL: r.URL.Query().Get("url")}
 	sort := r.URL.Query().Get("sort")
 	if strings.HasPrefix(sort, " ") { // restore + replaced by " "
 		sort = "+" + sort[1:]
 	}
-	log.Printf("[DEBUG] get comments for %+v, sort %s, format %s", locator, sort, r.URL.Query().Get("format"))
+
+	view := r.URL.Query().Get("view")
+	since, err := s.parseSince(r)
+	if err != nil {
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't parse since", rest.ErrCommentNotFound)
+		return
+	}
+	format := r.URL.Query().Get("format")
+	if format == "tree" {
+		since = time.Time{} // since doesn't make sense for tree
+	}
+
+	log.Printf("[DEBUG] get comments for %+v, sort %s, format %s, since %v", locator, sort, format, since)
 
 	key := cache.NewKey(locator.SiteID).ID(URLKeyWithUser(r)).Scopes(locator.SiteID, locator.URL)
-	data, err := s.Cache.Get(key, func() ([]byte, error) {
-		comments, e := s.DataService.Find(locator, sort)
+	data, err := s.cache.Get(key, func() ([]byte, error) {
+		comments, e := s.dataService.FindSince(locator, sort, rest.GetUserOrEmpty(r), since)
 		if e != nil {
 			comments = []store.Comment{} // error should clear comments and continue for post info
 		}
-		maskedComments := s.alterComments(comments, r)
+		comments = s.applyView(comments, view)
 		var b []byte
-		switch r.URL.Query().Get("format") {
+		switch format {
 		case "tree":
-			tree := service.MakeTree(maskedComments, sort, s.ReadOnlyAge)
+			tree := service.MakeTree(comments, sort, s.readOnlyAge)
 			if tree.Nodes == nil { // eliminate json nil serialization
 				tree.Nodes = []*service.Node{}
 			}
-			if s.DataService.IsReadOnly(locator) {
+			if s.dataService.IsReadOnly(locator) {
 				tree.Info.ReadOnly = true
 			}
 			b, e = encodeJSONWithHTML(tree)
 		default:
-			withInfo := commentsWithInfo{Comments: maskedComments}
-			if info, ee := s.DataService.Info(locator, s.ReadOnlyAge); ee == nil {
+			withInfo := commentsWithInfo{Comments: comments}
+			if info, ee := s.dataService.Info(locator, s.readOnlyAge); ee == nil {
 				withInfo.Info = info
 			}
 			b, e = encodeJSONWithHTML(withInfo)
@@ -69,38 +110,13 @@ func (s *Rest) findCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-// POST /preview, body is a comment, returns rendered html
-func (s *Rest) previewCommentCtrl(w http.ResponseWriter, r *http.Request) {
-	comment := store.Comment{}
-	if err := render.DecodeJSON(http.MaxBytesReader(w, r.Body, hardBodyLimit), &comment); err != nil {
-		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't bind comment", rest.ErrDecode)
-		return
-	}
-
-	user, err := rest.GetUserInfo(r)
-	if err != nil { // this not suppose to happen (handled by Auth), just dbl-check
-		rest.SendErrorJSON(w, r, http.StatusUnauthorized, err, "can't get user info", rest.ErrNoAccess)
-		return
-	}
-	comment.User = user
-	comment.Orig = comment.Text
-	if err = s.DataService.ValidateComment(&comment); err != nil {
-		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "invalid comment", rest.ErrCommentValidation)
-		return
-	}
-
-	comment = s.CommentFormatter.Format(comment)
-	comment.Sanitize()
-	render.HTML(w, r, comment.Text)
-}
-
 // GET /info?site=siteID&url=post-url - get info about the post
-func (s *Rest) infoCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *public) infoCtrl(w http.ResponseWriter, r *http.Request) {
 	locator := store.Locator{SiteID: r.URL.Query().Get("site"), URL: r.URL.Query().Get("url")}
 
 	key := cache.NewKey(locator.SiteID).ID(URLKey(r)).Scopes(locator.SiteID, locator.URL)
-	data, err := s.Cache.Get(key, func() ([]byte, error) {
-		info, e := s.DataService.Info(locator, s.ReadOnlyAge)
+	data, err := s.cache.Get(key, func() ([]byte, error) {
+		info, e := s.dataService.Info(locator, s.readOnlyAge)
 		if e != nil {
 			return nil, e
 		}
@@ -117,8 +133,9 @@ func (s *Rest) infoCtrl(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-// GET /last/{limit}?site=siteID - last comments for the siteID, across all posts, sorted by time
-func (s *Rest) lastCommentsCtrl(w http.ResponseWriter, r *http.Request) {
+// GET /last/{limit}?site=siteID&since=unix_ts_msec - last comments for the siteID, across all posts, sorted by time, optionally
+// limited with "since" param
+func (s *public) lastCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 	siteID := r.URL.Query().Get("site")
 	log.Printf("[DEBUG] get last comments for %s", siteID)
 
@@ -127,13 +144,18 @@ func (s *Rest) lastCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 		limit = 0
 	}
 
+	sinceTime, err := s.parseSince(r)
+	if err != nil {
+		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't translate since parameter", rest.ErrDecode)
+		return
+	}
+
 	key := cache.NewKey(siteID).ID(URLKey(r)).Scopes(lastCommentsScope)
-	data, err := s.Cache.Get(key, func() ([]byte, error) {
-		comments, e := s.DataService.Last(siteID, limit)
+	data, err := s.cache.Get(key, func() ([]byte, error) {
+		comments, e := s.dataService.Last(siteID, limit, sinceTime, rest.GetUserOrEmpty(r))
 		if e != nil {
 			return nil, e
 		}
-		comments = s.alterComments(comments, r)
 		// filter deleted from last comments view. Blocked marked as deleted and will sneak in without
 		filterDeleted := filterComments(comments, func(c store.Comment) bool { return !c.Deleted })
 		return encodeJSONWithHTML(filterDeleted)
@@ -150,7 +172,7 @@ func (s *Rest) lastCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 }
 
 // GET /id/{id}?site=siteID&url=post-url - gets a comment by id
-func (s *Rest) commentByIDCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *public) commentByIDCtrl(w http.ResponseWriter, r *http.Request) {
 
 	id := chi.URLParam(r, "id")
 	siteID := r.URL.Query().Get("site")
@@ -158,12 +180,11 @@ func (s *Rest) commentByIDCtrl(w http.ResponseWriter, r *http.Request) {
 
 	log.Printf("[DEBUG] get comments by id %s, %s %s", id, siteID, url)
 
-	comment, err := s.DataService.Get(store.Locator{SiteID: siteID, URL: url}, id)
+	comment, err := s.dataService.Get(store.Locator{SiteID: siteID, URL: url}, id, rest.GetUserOrEmpty(r))
 	if err != nil {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't get comment by id", rest.ErrCommentNotFound)
 		return
 	}
-	comment = s.alterComments([]store.Comment{comment}, r)[0]
 	render.Status(r, http.StatusOK)
 
 	if err = R.RenderJSONWithHTML(w, r, comment); err != nil {
@@ -171,17 +192,22 @@ func (s *Rest) commentByIDCtrl(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-// GET /comments?site=siteID&user=id - returns comments for given userID
-func (s *Rest) findUserCommentsCtrl(w http.ResponseWriter, r *http.Request) {
+// GET /comments?site=siteID&user=id&limit=123&skip=10 - returns comments for given userID
+func (s *public) findUserCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 
 	userID := r.URL.Query().Get("user")
 	siteID := r.URL.Query().Get("site")
 
-	limit, err := strconv.Atoi(r.URL.Query().Get("limit"))
-	if err != nil {
-		limit = 0
+	getNumWithDef := func(key string) int {
+		res, err := strconv.Atoi(r.URL.Query().Get(key))
+		if err != nil {
+			res = 0
+		}
+		return res
 	}
 
+	limit, skip := getNumWithDef("limit"), getNumWithDef("skip")
+
 	resp := struct {
 		Comments []store.Comment `json:"comments,omitempty"`
 		Count    int             `json:"count,omitempty"`
@@ -190,14 +216,13 @@ func (s *Rest) findUserCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 	log.Printf("[DEBUG] get comments for userID %s, %s", userID, siteID)
 
 	key := cache.NewKey(siteID).ID(URLKeyWithUser(r)).Scopes(userID, siteID)
-	data, err := s.Cache.Get(key, func() ([]byte, error) {
-		comments, e := s.DataService.User(siteID, userID, limit, 0)
+	data, err := s.cache.Get(key, func() ([]byte, error) {
+		comments, e := s.dataService.User(siteID, userID, limit, skip, rest.GetUserOrEmpty(r))
 		if e != nil {
 			return nil, e
 		}
-		comments = s.alterComments(comments, r)
 		comments = filterComments(comments, func(c store.Comment) bool { return !c.Deleted })
-		count, e := s.DataService.UserCount(siteID, userID)
+		count, e := s.dataService.UserCount(siteID, userID)
 		if e != nil {
 			return nil, e
 		}
@@ -215,53 +240,10 @@ func (s *Rest) findUserCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-// GET /config?site=siteID - returns configuration
-func (s *Rest) configCtrl(w http.ResponseWriter, r *http.Request) {
-	siteID := r.URL.Query().Get("site")
-
-	type config struct {
-		Version        string   `json:"version"`
-		EditDuration   int      `json:"edit_duration"`
-		MaxCommentSize int      `json:"max_comment_size"`
-		Admins         []string `json:"admins"`
-		AdminEmail     string   `json:"admin_email"`
-		Auth           []string `json:"auth_providers"`
-		LowScore       int      `json:"low_score"`
-		CriticalScore  int      `json:"critical_score"`
-		PositiveScore  bool     `json:"positive_score"`
-		ReadOnlyAge    int      `json:"readonly_age"`
-		MaxImageSize   int      `json:"max_image_size"`
-	}
-
-	cnf := config{
-		Version:        s.Version,
-		EditDuration:   int(s.DataService.EditDuration.Seconds()),
-		MaxCommentSize: s.DataService.MaxCommentSize,
-		Admins:         s.DataService.AdminStore.Admins(siteID),
-		AdminEmail:     s.DataService.AdminStore.Email(siteID),
-		LowScore:       s.ScoreThresholds.Low,
-		CriticalScore:  s.ScoreThresholds.Critical,
-		PositiveScore:  s.DataService.PositiveScore,
-		ReadOnlyAge:    s.ReadOnlyAge,
-		MaxImageSize:   s.ImageService.Store.SizeLimit(),
-	}
-
-	cnf.Auth = []string{}
-	for _, ap := range s.Authenticator.Providers() {
-		cnf.Auth = append(cnf.Auth, ap.Name())
-	}
-
-	if cnf.Admins == nil { // prevent json serialization to nil
-		cnf.Admins = []string{}
-	}
-	render.Status(r, http.StatusOK)
-	render.JSON(w, r, cnf)
-}
-
 // GET /count?site=siteID&url=post-url - get number of comments for given post
-func (s *Rest) countCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *public) countCtrl(w http.ResponseWriter, r *http.Request) {
 	locator := store.Locator{SiteID: r.URL.Query().Get("site"), URL: r.URL.Query().Get("url")}
-	count, err := s.DataService.Count(locator)
+	count, err := s.dataService.Count(locator)
 	if err != nil {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't get count", rest.ErrPostNotFound)
 		return
@@ -270,10 +252,11 @@ func (s *Rest) countCtrl(w http.ResponseWriter, r *http.Request) {
 }
 
 // POST /counts?site=siteID - get number of comments for posts from post body
-func (s *Rest) countMultiCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *public) countMultiCtrl(w http.ResponseWriter, r *http.Request) {
+	const countBodyLimit int64 = 1024 * 128 // count request can be big for some site because it lists all urls
 	siteID := r.URL.Query().Get("site")
 	posts := []string{}
-	if err := render.DecodeJSON(http.MaxBytesReader(w, r.Body, hardBodyLimit), &posts); err != nil {
+	if err := render.DecodeJSON(http.MaxBytesReader(w, r.Body, countBodyLimit), &posts); err != nil {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't get list of posts from request", rest.ErrSiteNotFound)
 		return
 	}
@@ -284,8 +267,8 @@ func (s *Rest) countMultiCtrl(w http.ResponseWriter, r *http.Request) {
 	sha := base64.URLEncoding.EncodeToString(h[:])
 
 	key := cache.NewKey(siteID).ID(sha).Scopes(siteID)
-	data, err := s.Cache.Get(key, func() ([]byte, error) {
-		counts, e := s.DataService.Counts(siteID, posts)
+	data, err := s.cache.Get(key, func() ([]byte, error) {
+		counts, e := s.dataService.Counts(siteID, posts)
 		if e != nil {
 			return nil, e
 		}
@@ -303,7 +286,7 @@ func (s *Rest) countMultiCtrl(w http.ResponseWriter, r *http.Request) {
 }
 
 // GET /list?site=siteID&limit=50&skip=10 - list posts with comments
-func (s *Rest) listCtrl(w http.ResponseWriter, r *http.Request) {
+func (s *public) listCtrl(w http.ResponseWriter, r *http.Request) {
 
 	siteID := r.URL.Query().Get("site")
 	limit, skip := 0, 0
@@ -316,8 +299,8 @@ func (s *Rest) listCtrl(w http.ResponseWriter, r *http.Request) {
 	}
 
 	key := cache.NewKey(siteID).ID(URLKey(r)).Scopes(siteID)
-	data, err := s.Cache.Get(key, func() ([]byte, error) {
-		posts, e := s.DataService.List(siteID, limit, skip)
+	data, err := s.cache.Get(key, func() ([]byte, error) {
+		posts, e := s.dataService.List(siteID, limit, skip)
 		if e != nil {
 			return nil, e
 		}
@@ -330,28 +313,14 @@ func (s *Rest) listCtrl(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err = R.RenderJSONFromBytes(w, r, data); err != nil {
-		log.Printf("[WARN] can't render posts lits for site %s", siteID)
+		log.Printf("[WARN] can't render posts list for site %s", siteID)
 	}
 }
 
 // GET /picture/{user}/{id} - get picture
-func (s *Rest) loadPictureCtrl(w http.ResponseWriter, r *http.Request) {
-
-	imgContentType := func(img string) string {
-		img = strings.ToLower(img)
-		switch {
-		case strings.HasSuffix(img, ".png"):
-			return "image/png"
-		case strings.HasSuffix(img, ".jpg") || strings.HasSuffix(img, ".jpeg"):
-			return "image/jpeg"
-		case strings.HasSuffix(img, ".gif"):
-			return "image/gif"
-		}
-		return "image/*"
-	}
-
+func (s *public) loadPictureCtrl(w http.ResponseWriter, r *http.Request) {
 	id := chi.URLParam(r, "user") + "/" + chi.URLParam(r, "id")
-	imgRdr, size, err := s.ImageService.Load(id)
+	img, err := s.imageService.Load(id)
 	if err != nil {
 		rest.SendErrorJSON(w, r, http.StatusBadRequest, err, "can't get image "+id, rest.ErrAssetNotFound)
 		return
@@ -367,23 +336,17 @@ func (s *Rest) loadPictureCtrl(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	defer func() {
-		if e := imgRdr.Close(); e != nil {
-			log.Printf("[WARN] failed to close reader for picture %s, %v", id, e)
-		}
-	}()
-
-	w.Header().Set("Content-Type", imgContentType(id))
-	w.Header().Set("Content-Length", strconv.Itoa(int(size)))
+	w.Header().Set("Content-Type", s.imageService.ImgContentType(img))
+	w.Header().Set("Content-Length", strconv.Itoa(len(img)))
 	w.WriteHeader(http.StatusOK)
-	if _, err = io.Copy(w, imgRdr); err != nil {
+	if _, err = io.Copy(w, bytes.NewReader(img)); err != nil {
 		log.Printf("[WARN] can't send response to %s, %s", r.RemoteAddr, err)
 	}
 }
 
 // GET /index.html - respond to /index.html with the content of getstarted.html under /web root
-func (s *Rest) getStartedCtrl(w http.ResponseWriter, r *http.Request) {
-	data, err := ioutil.ReadFile(path.Join(s.WebRoot, "getstarted.html"))
+func (s *public) getStartedCtrl(w http.ResponseWriter, r *http.Request) {
+	data, err := os.ReadFile(path.Join(s.webRoot, "getstarted.html"))
 	if err != nil {
 		w.WriteHeader(http.StatusNotFound)
 		return
@@ -392,11 +355,42 @@ func (s *Rest) getStartedCtrl(w http.ResponseWriter, r *http.Request) {
 }
 
 // GET /robots.txt
-func (s *Rest) getRobotsCtrl(w http.ResponseWriter, r *http.Request) {
-	allowed := []string{"/find", "/last", "/id", "/count", "/counts", "/list", "/config",
+func (s *public) robotsCtrl(w http.ResponseWriter, r *http.Request) {
+	allowed := []string{"/find", "/last", "/id", "/count", "/counts", "/list", "/config", "/user",
 		"/img", "/avatar", "/picture"}
 	for i := range allowed {
 		allowed[i] = "Allow: /api/v1" + allowed[i]
 	}
 	render.PlainText(w, r, "User-agent: *\nDisallow: /auth/\nDisallow: /api/\n"+strings.Join(allowed, "\n")+"\n")
 }
+
+func (s *public) applyView(comments []store.Comment, view string) []store.Comment {
+	if strings.EqualFold(view, "user") {
+		projection := make([]store.Comment, 0, len(comments))
+		for _, c := range comments {
+			if c.Deleted {
+				continue
+			}
+			p := store.Comment{
+				ID:   c.ID,
+				User: c.User,
+			}
+			projection = append(projection, p)
+		}
+		return projection
+	}
+
+	return comments
+}
+
+func (s *public) parseSince(r *http.Request) (time.Time, error) {
+	sinceTS := time.Time{}
+	if since := r.URL.Query().Get("since"); since != "" {
+		unixTS, e := strconv.ParseInt(since, 10, 64)
+		if e != nil {
+			return time.Time{}, errors.Wrap(e, "can't translate since parameter")
+		}
+		sinceTS = time.Unix(unixTS/1000, 1000000*(unixTS%1000)) // since param in msec timestamp
+	}
+	return sinceTS, nil
+}