From 13c511b1b05aff46f8edec54e43d080f1b6baa67 Mon Sep 17 00:00:00 2001
From: Umputun <umputun@gmail.com>
Date: Sun, 10 Feb 2019 16:39:08 -0600
Subject: [PATCH] support controversy in Find for comments stored without it
 #274

---
 backend/app/store/service/service.go      | 39 ++++++++++++++++-------
 backend/app/store/service/service_test.go | 34 ++++++++++++++++++++
 2 files changed, 62 insertions(+), 11 deletions(-)

diff --git a/backend/app/store/service/service.go b/backend/app/store/service/service.go
index 4d599ccd..079cb2f4 100644
--- a/backend/app/store/service/service.go
+++ b/backend/app/store/service/service.go
@@ -180,17 +180,7 @@ func (s *DataStore) Vote(locator store.Locator, commentID string, userID string,
 		comment.Score--
 	}
 
-	upsAndDowns := func() (ups, downs int) {
-		for _, v := range comment.Votes {
-			if v {
-				ups++
-				continue
-			}
-			downs++
-		}
-		return ups, downs
-	}
-	comment.Controversy = s.controversy(upsAndDowns())
+	comment.Controversy = s.controversy(s.upsAndDowns(comment))
 
 	return comment, s.Put(locator, comment)
 }
@@ -427,6 +417,33 @@ func (s *DataStore) SetMetas(siteID string, umetas []UserMetaData, pmetas []Post
 	return errs.ErrorOrNil()
 }
 
+func (s *DataStore) Find(locator store.Locator, sort string) ([]store.Comment, error) {
+	comments, err := s.Interface.Find(locator, sort)
+	if err != nil {
+		return comments, err
+	}
+
+	// set votes controversy for comments added prior to #274
+	for i, c := range comments {
+		if c.Controversy == 0 && len(c.Votes) > 0 {
+			comments[i].Controversy = s.controversy(s.upsAndDowns(c))
+		}
+	}
+
+	return comments, nil
+}
+
+func (s *DataStore) upsAndDowns(c store.Comment) (ups, downs int) {
+	for _, v := range c.Votes {
+		if v {
+			ups++
+			continue
+		}
+		downs++
+	}
+	return ups, downs
+}
+
 // getsScopedLocks pull lock from the map if found or create a new one
 func (s *DataStore) getsScopedLocks(id string) (lock sync.Locker) {
 	s.scopedLocks.Do(func() { s.scopedLocks.locks = map[string]sync.Locker{} })
diff --git a/backend/app/store/service/service_test.go b/backend/app/store/service/service_test.go
index d07172e6..2612e945 100644
--- a/backend/app/store/service/service_test.go
+++ b/backend/app/store/service/service_test.go
@@ -652,6 +652,40 @@ func TestService_HasReplies(t *testing.T) {
 	assert.True(t, b.HasReplies(comment))
 }
 
+func TestService_Find(t *testing.T) {
+	defer os.Remove(testDb)
+
+	// two comments for https://radio-t.com, no reply
+	b := DataStore{Interface: prepStoreEngine(t), EditDuration: 100 * time.Millisecond,
+		AdminStore: admin.NewStaticStore("secret 123", []string{"user2"}, "user@email.com")}
+
+	res, err := b.Find(store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, "time")
+	require.NoError(t, err)
+	assert.Equal(t, 2, len(res))
+
+	// add one more for https://radio-t.com/2
+	comment := store.Comment{
+		ID:        "123456",
+		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"},
+		Score:     1,
+		Votes:     map[string]bool{"id-1": true, "id-2": true, "123456": false},
+	}
+	_, err = b.Interface.Create(comment) // create directly with engine, doesn't set Controversy
+	assert.Nil(t, err)
+
+	// make sure Controversy altered
+	res, err = b.Find(store.Locator{URL: "https://radio-t.com", SiteID: "radio-t"}, "-controversy")
+	require.NoError(t, err)
+	assert.Equal(t, 3, len(res))
+	assert.Equal(t, "123456", res[0].ID)
+	assert.InDelta(t, 1.73, res[0].Controversy, 0.01)
+	assert.Equal(t, "id-1", res[1].ID)
+	assert.InDelta(t, 0, res[1].Controversy, 0.01)
+}
+
 // makes new boltdb, put two records
 func prepStoreEngine(t *testing.T) engine.Interface {
 	os.Remove(testDb)