initial commit; working state

.gitignore

@@ -0,0 +1,28 @@
+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+go.work.sum
+
+# env file
+.env
+
+# database
+*.boltdb

db/crypto.go

@@ -0,0 +1,67 @@
+package db
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"errors"
+	"fmt"
+	"io"
+	random "math/rand"
+)
+
+func encrypt(text string, key string) ([]byte, error) {
+	c, err := aes.NewCipher([]byte(key))
+	if err != nil {
+		return nil, err
+	}
+
+	gcm, err := cipher.NewGCM(c)
+	if err != nil {
+		return nil, err
+	}
+
+	nonce := make([]byte, gcm.NonceSize())
+	if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
+		return nil, err
+	}
+
+	return gcm.Seal(nonce, nonce, []byte(text), nil), nil
+}
+
+func decrypt(ciphertext []byte, key string) (string, error) {
+	c, err := aes.NewCipher([]byte(key))
+	if err != nil {
+		return "", fmt.Errorf("failed to create cipher: %w", err)
+	}
+
+	gcm, err := cipher.NewGCM(c)
+	if err != nil {
+		return "", fmt.Errorf("failed to create GCM: %w", err)
+	}
+
+	nonceSize := gcm.NonceSize()
+	if len(ciphertext) < nonceSize {
+		return "", errors.New("ciphertext too short")
+	}
+
+	nonce, ciphertext := ciphertext[:nonceSize], ciphertext[nonceSize:]
+	plaintext, err := gcm.Open(nil, nonce, ciphertext, nil)
+	if err != nil {
+		return "", fmt.Errorf("failed to decrypt: %w", err)
+	}
+
+	return string(plaintext), nil
+}
+
+var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
+
+const keyLength = 32
+
+func randomKey() string {
+	b := make([]rune, keyLength)
+	for i := range b {
+		b[i] = letterRunes[random.Intn(len(letterRunes))]
+	}
+	return string(b)
+}

db/db.go

@@ -0,0 +1,205 @@
+package db
+
+import (
+	"errors"
+	"fmt"
+	"log"
+	"time"
+
+	"encoding/json"
+
+	"github.com/boltdb/bolt"
+)
+
+var (
+	pastesBucketName   = []byte("pastes")
+	metadataBucketName = []byte("metadata")
+)
+
+var (
+	ErrPasteNotFound  = errors.New("paste not found")
+	ErrBucketNotFound = errors.New("bucket not found")
+	ErrPasteExpired   = errors.New("paste expired")
+)
+
+type DB struct {
+	boltDB *bolt.DB
+}
+
+func NewDB(name string) (*DB, error) {
+	boltDB, err := bolt.Open(name, 0600, &bolt.Options{Timeout: 1 * time.Second})
+	if err != nil {
+		return nil, err
+	}
+
+	return &DB{boltDB: boltDB}, nil
+}
+
+func (d *DB) Close() error {
+	return d.boltDB.Close()
+}
+
+func (d *DB) NewPaste(text string, expiresAt time.Time) (*Paste, error) {
+	paste, err := NewEncryptedPaste(text, expiresAt)
+	if err != nil {
+		return nil, err
+	}
+	return paste, d.save(paste)
+}
+
+func (d *DB) save(paste *Paste) error {
+	return d.boltDB.Update(func(tx *bolt.Tx) error {
+		// Save encrypted paste
+		pasteBucket, err := tx.CreateBucketIfNotExists(pastesBucketName)
+		if err != nil {
+			return err
+		}
+
+		if err = pasteBucket.Put([]byte(paste.ID), paste.EncryptedBytes); err != nil {
+			return err
+		}
+
+		// Save metadata to check expiration
+		pasteJson, err := json.Marshal(paste)
+		if err != nil {
+			return err
+		}
+
+		metadataBucket, err := tx.CreateBucketIfNotExists(metadataBucketName)
+		if err != nil {
+			return err
+		}
+		return metadataBucket.Put([]byte(paste.ID), pasteJson)
+	})
+}
+
+func (d *DB) Get(id string) (*Paste, error) {
+	var paste Paste
+
+	err := d.boltDB.View(func(tx *bolt.Tx) error {
+		// get metadata
+		bucket := tx.Bucket(metadataBucketName)
+		if bucket == nil {
+			return ErrBucketNotFound
+		}
+
+		// unmarshal metadata
+		jsonPaste := bucket.Get([]byte(id))
+		if jsonPaste == nil {
+			return ErrPasteNotFound
+		}
+
+		if err := json.Unmarshal(jsonPaste, &paste); err != nil {
+			return err
+		}
+
+		// ensure paste is not expired
+		if time.Now().After(paste.ExpiresAt) {
+			return ErrPasteExpired
+		}
+
+		return nil
+	})
+
+	return &paste, err
+}
+
+func (d *DB) Decrypt(id string, key string) (string, error) {
+	// delete paste if expired
+	if _, err := d.Get(id); err == ErrPasteExpired {
+		return "", d.Delete(id)
+	}
+
+	var decryptedText string
+	err := d.boltDB.Update(func(tx *bolt.Tx) error {
+		pasteBucket := tx.Bucket(pastesBucketName)
+		if pasteBucket == nil {
+			return ErrBucketNotFound
+		}
+
+		encryptedPaste := pasteBucket.Get([]byte(id))
+		if encryptedPaste == nil {
+			return ErrPasteNotFound
+		}
+
+		var err error
+		decryptedText, err = decrypt(encryptedPaste, key)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		return "", err
+	}
+
+	return decryptedText, d.Delete(id)
+}
+
+func (d *DB) Delete(id string) error {
+	return d.boltDB.Update(func(tx *bolt.Tx) error {
+		pasteBucket := tx.Bucket(pastesBucketName)
+		if pasteBucket == nil {
+			return ErrBucketNotFound
+		}
+
+		if err := pasteBucket.Delete([]byte(id)); err != nil {
+			return err
+		}
+
+		metadataBucket := tx.Bucket(metadataBucketName)
+		if metadataBucket == nil {
+			return ErrBucketNotFound
+		}
+
+		return metadataBucket.Delete([]byte(id))
+	})
+}
+
+func (d *DB) DeleteExpired() error {
+	var expiredPastes []string
+	err := d.boltDB.View(func(tx *bolt.Tx) error {
+		bucket := tx.Bucket(metadataBucketName)
+		if bucket == nil {
+			return ErrBucketNotFound
+		}
+
+		return bucket.ForEach(func(k, v []byte) error {
+			var paste Paste
+			if err := json.Unmarshal(v, &paste); err != nil {
+				return err
+			}
+
+			if time.Now().After(paste.ExpiresAt) {
+				expiredPastes = append(expiredPastes, string(k))
+			}
+
+			return nil
+		})
+	})
+
+	if err != nil {
+		return fmt.Errorf("error getting expired pastes: %v", err)
+	}
+
+	for _, id := range expiredPastes {
+		if err := d.Delete(id); err != nil {
+			log.Println(fmt.Errorf("error deleting expired paste %s: %v", id, err))
+		}
+	}
+
+	return nil
+}
+
+func (d *DB) DeleteExpiredPeriodically(interval time.Duration) {
+	ticker := time.NewTicker(interval)
+	defer ticker.Stop()
+
+	for range ticker.C {
+		if err := d.DeleteExpired(); err != nil {
+			log.Println(fmt.Errorf("error deleting expired pastes: %v", err))
+		}
+	}
+}

db/models.go

@@ -0,0 +1,31 @@
+package db
+
+import (
+	"time"
+)
+
+type Paste struct {
+	ID             string    `json:"id"`
+	Text           string    `json:"-"`
+	EncryptedBytes []byte    `json:"-"`
+	Key            string    `json:"-"`
+	CreatedAt      time.Time `json:"createdAt"`
+	ExpiresAt      time.Time `json:"expiresAt"`
+}
+
+func NewEncryptedPaste(text string, expiresAt time.Time) (*Paste, error) {
+	key := randomKey()
+	encryptedText, err := encrypt(text, key)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Paste{
+		ID:             randomKey(),
+		Text:           text,
+		EncryptedBytes: encryptedText,
+		Key:            key,
+		CreatedAt:      time.Now(),
+		ExpiresAt:      expiresAt,
+	}, nil
+}

go.mod

@@ -0,0 +1,10 @@
+module github.com/v1k45/paste
+
+go 1.22.3
+
+require (
+	github.com/a-h/templ v0.2.707
+	github.com/boltdb/bolt v1.3.1
+)
+
+require golang.org/x/sys v0.19.0 // indirect

go.sum

@@ -0,0 +1,8 @@
+github.com/a-h/templ v0.2.707 h1:T1Gkd2ugbRglZ9rYw/VBchWOSZVKmetDbBkm4YubM7U=
+github.com/a-h/templ v0.2.707/go.mod h1:5cqsugkq9IerRNucNsI4DEamdHPsoGMQy99DzydLhM8=
+github.com/boltdb/bolt v1.3.1 h1:JQmyP4ZBrce+ZQu0dY660FMfatumYDLun9hBCUVIkF4=
+github.com/boltdb/bolt v1.3.1/go.mod h1:clJnj/oiGkjum5o1McbSZDSLxVThjynRyGBgiAx27Ps=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
+golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=

main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"time"
+
+	"github.com/v1k45/paste/db"
+	"github.com/v1k45/paste/web"
+)
+
+func main() {
+	// Open the database
+	boltdb, err := db.NewDB("pastes.boltdb")
+	if err != nil {
+		log.Fatalf("failed to open database: %v", err)
+	}
+	go boltdb.DeleteExpiredPeriodically(time.Minute * 5)
+
+	// Start the web server
+	handler := web.NewHandler(boltdb)
+	http.ListenAndServe(":8080", handler.Router())
+}

views/base.templ

@@ -0,0 +1,38 @@
+package views
+
+templ base() {
+    <!doctype html>
+    <html lang="en">
+    <head>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <meta name="color-scheme" content="light dark" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.min.css"/>
+        <title>Paste</title>
+    </head>
+    <body>
+        <main class="container">
+            <nav>
+                <ul>
+                    <li>
+                    <a href="/">Paste</a> &mdash; secure one-time paste bin.
+                    </li>
+                </ul>
+            </nav>
+            <hr />
+            { children... }
+            <hr />
+            <footer>
+                <small>
+                    <p style="color: #8891A4;">
+                        Paste is open-source and free to use. <a href="https://github.com/v1k45/paste">View source on github</a>.
+                    </p>
+                    <p style="color: #8891A4;">
+                        Pasted content is encrypted and stored with an expiration time. Once the content is read, it is deleted from the server. <br/>
+                    </p>
+                </small>
+            </footer>
+        </main>
+    </body>
+    </html>
+}

views/base_templ.go

@@ -0,0 +1,43 @@
+// Code generated by templ - DO NOT EDIT.
+
+// templ: version: v0.2.707
+package views
+
+//lint:file-ignore SA4006 This context is only used if a nested component is present.
+
+import "github.com/a-h/templ"
+import "context"
+import "io"
+import "bytes"
+
+func base() templ.Component {
+	return templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+		if !templ_7745c5c3_IsBuffer {
+			templ_7745c5c3_Buffer = templ.GetBuffer()
+			defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var1 == nil {
+			templ_7745c5c3_Var1 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<!doctype html><html lang=\"en\"><head><meta charset=\"utf-8\"><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\"><meta name=\"color-scheme\" content=\"light dark\"><link rel=\"stylesheet\" href=\"https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.min.css\"><title>Paste</title></head><body><main class=\"container\"><nav><ul><li><a href=\"/\">Paste</a> &mdash; secure one-time paste bin.</li></ul></nav><hr>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Err = templ_7745c5c3_Var1.Render(ctx, templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<hr><footer><small><p style=\"color: #8891A4;\">Paste is open-source and free to use. <a href=\"https://github.com/v1k45/paste\">View source on github</a>.</p><p style=\"color: #8891A4;\">Pasted content is encrypted and stored with an expiration time. Once the content is read, it is deleted from the server. <br></p></small></footer></main></body></html>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if !templ_7745c5c3_IsBuffer {
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
+		}
+		return templ_7745c5c3_Err
+	})
+}

views/decrypt.templ

@@ -0,0 +1,25 @@
+package views
+
+templ Decrypt(text string) {
+    @base() {
+        <div style="padding-bottom: 5rem;">
+            <hgroup>
+            <h3>View Paste</h3>
+            <p>
+            <small style="color: #8891A4;">
+                Please make sure to save the content before closing this page.
+                This paste has been deleted and will no longer be available for viewing again.
+            </small>
+            </p>
+            </hgroup>
+            <div>
+                <pre id="pastedContent" style="padding: 1rem; min-height: 10rem;">{text}</pre>
+                <div>
+                    <button onclick="copyText(this, '#pastedContent')" data-tooltip="Click to copy">Copy content</button>
+                </div>
+            </div>
+            @copyTextScript()
+        </div>
+    }
+}
+

views/decrypt_templ.go

@@ -0,0 +1,71 @@
+// Code generated by templ - DO NOT EDIT.
+
+// templ: version: v0.2.707
+package views
+
+//lint:file-ignore SA4006 This context is only used if a nested component is present.
+
+import "github.com/a-h/templ"
+import "context"
+import "io"
+import "bytes"
+
+func Decrypt(text string) templ.Component {
+	return templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+		if !templ_7745c5c3_IsBuffer {
+			templ_7745c5c3_Buffer = templ.GetBuffer()
+			defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var1 == nil {
+			templ_7745c5c3_Var1 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		templ_7745c5c3_Var2 := templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+			if !templ_7745c5c3_IsBuffer {
+				templ_7745c5c3_Buffer = templ.GetBuffer()
+				defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<div style=\"padding-bottom: 5rem;\"><hgroup><h3>View Paste</h3><p><small style=\"color: #8891A4;\">Please make sure to save the content before closing this page. This paste has been deleted and will no longer be available for viewing again.</small></p></hgroup><div><pre id=\"pastedContent\" style=\"padding: 1rem; min-height: 10rem;\">")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			var templ_7745c5c3_Var3 string
+			templ_7745c5c3_Var3, templ_7745c5c3_Err = templ.JoinStringErrs(text)
+			if templ_7745c5c3_Err != nil {
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `views/decrypt.templ`, Line: 16, Col: 87}
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var3))
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("</pre><div><button onclick=\"copyText(this, &#39;#pastedContent&#39;)\" data-tooltip=\"Click to copy\">Copy content</button></div></div>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			templ_7745c5c3_Err = copyTextScript().Render(ctx, templ_7745c5c3_Buffer)
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("</div>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			if !templ_7745c5c3_IsBuffer {
+				_, templ_7745c5c3_Err = io.Copy(templ_7745c5c3_W, templ_7745c5c3_Buffer)
+			}
+			return templ_7745c5c3_Err
+		})
+		templ_7745c5c3_Err = base().Render(templ.WithChildren(ctx, templ_7745c5c3_Var2), templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if !templ_7745c5c3_IsBuffer {
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
+		}
+		return templ_7745c5c3_Err
+	})
+}

views/error.templ

@@ -0,0 +1,14 @@
+package views
+
+templ Error(title, message string) {
+    @base() {
+        <div style="padding-bottom: 5rem;">
+            <hgroup>
+            <h3>{title}</h3>
+            <small style="color: #8891A4;">
+                {message}
+            </small>
+            </hgroup>
+        </div>
+    }
+}

views/error_templ.go

@@ -0,0 +1,76 @@
+// Code generated by templ - DO NOT EDIT.
+
+// templ: version: v0.2.707
+package views
+
+//lint:file-ignore SA4006 This context is only used if a nested component is present.
+
+import "github.com/a-h/templ"
+import "context"
+import "io"
+import "bytes"
+
+func Error(title, message string) templ.Component {
+	return templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+		if !templ_7745c5c3_IsBuffer {
+			templ_7745c5c3_Buffer = templ.GetBuffer()
+			defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var1 == nil {
+			templ_7745c5c3_Var1 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		templ_7745c5c3_Var2 := templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+			if !templ_7745c5c3_IsBuffer {
+				templ_7745c5c3_Buffer = templ.GetBuffer()
+				defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<div style=\"padding-bottom: 5rem;\"><hgroup><h3>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			var templ_7745c5c3_Var3 string
+			templ_7745c5c3_Var3, templ_7745c5c3_Err = templ.JoinStringErrs(title)
+			if templ_7745c5c3_Err != nil {
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `views/error.templ`, Line: 7, Col: 22}
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var3))
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("</h3><small style=\"color: #8891A4;\">")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			var templ_7745c5c3_Var4 string
+			templ_7745c5c3_Var4, templ_7745c5c3_Err = templ.JoinStringErrs(message)
+			if templ_7745c5c3_Err != nil {
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `views/error.templ`, Line: 9, Col: 24}
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var4))
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("</small></hgroup></div>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			if !templ_7745c5c3_IsBuffer {
+				_, templ_7745c5c3_Err = io.Copy(templ_7745c5c3_W, templ_7745c5c3_Buffer)
+			}
+			return templ_7745c5c3_Err
+		})
+		templ_7745c5c3_Err = base().Render(templ.WithChildren(ctx, templ_7745c5c3_Var2), templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if !templ_7745c5c3_IsBuffer {
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
+		}
+		return templ_7745c5c3_Err
+	})
+}

views/index.templ

@@ -0,0 +1,32 @@
+package views
+
+templ Index() {
+  @base() {
+    <form method="post">
+      <textarea
+        name="text"
+        placeholder="Paste your secret here, select expiration time and click 'Submit'"
+        aria-label="Paste your secret here"
+        rows="10"
+        required
+        autofocus
+      >
+      </textarea>
+      <div style="display: flex; align-items: end; justify-content: space-between;">
+        <div style="width: 33.33%">
+          <label for="expiration">Expires In</label>
+          <select id="expiration" expired name="expiration" aria-label="Expires In">
+            <option value="1h" selected>1 Hour</option>
+            <option value="1d">1 Day</option>
+            <option value="1w">1 Week</option>
+            <option value="2w">2 weeks</option>
+            <option value="4w">4 weeks</option>
+          </select>
+        </div>
+        <div style="width: 33.33%">
+          <button type="submit">Paste</button>
+        </div>
+      </div>
+    </form>
+  }
+}

views/index_templ.go

@@ -0,0 +1,50 @@
+// Code generated by templ - DO NOT EDIT.
+
+// templ: version: v0.2.707
+package views
+
+//lint:file-ignore SA4006 This context is only used if a nested component is present.
+
+import "github.com/a-h/templ"
+import "context"
+import "io"
+import "bytes"
+
+func Index() templ.Component {
+	return templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+		if !templ_7745c5c3_IsBuffer {
+			templ_7745c5c3_Buffer = templ.GetBuffer()
+			defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var1 == nil {
+			templ_7745c5c3_Var1 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		templ_7745c5c3_Var2 := templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+			if !templ_7745c5c3_IsBuffer {
+				templ_7745c5c3_Buffer = templ.GetBuffer()
+				defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<form method=\"post\"><textarea name=\"text\" placeholder=\"Paste your secret here, select expiration time and click &#39;Submit&#39;\" aria-label=\"Paste your secret here\" rows=\"10\" required autofocus></textarea><div style=\"display: flex; align-items: end; justify-content: space-between;\"><div style=\"width: 33.33%\"><label for=\"expiration\">Expires In</label> <select id=\"expiration\" expired name=\"expiration\" aria-label=\"Expires In\"><option value=\"1h\" selected>1 Hour</option> <option value=\"1d\">1 Day</option> <option value=\"1w\">1 Week</option> <option value=\"2w\">2 weeks</option> <option value=\"4w\">4 weeks</option></select></div><div style=\"width: 33.33%\"><button type=\"submit\">Paste</button></div></div></form>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			if !templ_7745c5c3_IsBuffer {
+				_, templ_7745c5c3_Err = io.Copy(templ_7745c5c3_W, templ_7745c5c3_Buffer)
+			}
+			return templ_7745c5c3_Err
+		})
+		templ_7745c5c3_Err = base().Render(templ.WithChildren(ctx, templ_7745c5c3_Var2), templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if !templ_7745c5c3_IsBuffer {
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
+		}
+		return templ_7745c5c3_Err
+	})
+}

views/paste.templ

@@ -0,0 +1,24 @@
+package views
+
+templ PasteSuccess(url string) {
+  @base() {
+    <div style="padding-bottom: 5rem;">
+        <hgroup>
+        <h3>Paste Created</h3>
+        <p>
+          <small style="color: #8891A4;">
+            Your secret paste has been created. Share the following link with the recipient:
+          </small>
+        </p>
+        </hgroup>
+        <div>
+            <pre id="url" style="padding: 1rem; min-height: 3rem;">{url}</pre>
+            <div>
+                <button onclick="copyText(this, '#url')" data-tooltip="Click to copy">Copy content</button>
+                <a href={ templ.SafeURL(url) } style="margin-left: 1rem;">View Paste</a>
+            </div>
+        </div>
+        @copyTextScript()
+    </div>
+  }
+}

views/paste_templ.go

@@ -0,0 +1,80 @@
+// Code generated by templ - DO NOT EDIT.
+
+// templ: version: v0.2.707
+package views
+
+//lint:file-ignore SA4006 This context is only used if a nested component is present.
+
+import "github.com/a-h/templ"
+import "context"
+import "io"
+import "bytes"
+
+func PasteSuccess(url string) templ.Component {
+	return templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+		if !templ_7745c5c3_IsBuffer {
+			templ_7745c5c3_Buffer = templ.GetBuffer()
+			defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var1 == nil {
+			templ_7745c5c3_Var1 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		templ_7745c5c3_Var2 := templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+			if !templ_7745c5c3_IsBuffer {
+				templ_7745c5c3_Buffer = templ.GetBuffer()
+				defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<div style=\"padding-bottom: 5rem;\"><hgroup><h3>Paste Created</h3><p><small style=\"color: #8891A4;\">Your secret paste has been created. Share the following link with the recipient:</small></p></hgroup><div><pre id=\"url\" style=\"padding: 1rem; min-height: 3rem;\">")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			var templ_7745c5c3_Var3 string
+			templ_7745c5c3_Var3, templ_7745c5c3_Err = templ.JoinStringErrs(url)
+			if templ_7745c5c3_Err != nil {
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `views/paste.templ`, Line: 15, Col: 71}
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var3))
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("</pre><div><button onclick=\"copyText(this, &#39;#url&#39;)\" data-tooltip=\"Click to copy\">Copy content</button> <a href=\"")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			var templ_7745c5c3_Var4 templ.SafeURL = templ.SafeURL(url)
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(string(templ_7745c5c3_Var4)))
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("\" style=\"margin-left: 1rem;\">View Paste</a></div></div>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			templ_7745c5c3_Err = copyTextScript().Render(ctx, templ_7745c5c3_Buffer)
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("</div>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			if !templ_7745c5c3_IsBuffer {
+				_, templ_7745c5c3_Err = io.Copy(templ_7745c5c3_W, templ_7745c5c3_Buffer)
+			}
+			return templ_7745c5c3_Err
+		})
+		templ_7745c5c3_Err = base().Render(templ.WithChildren(ctx, templ_7745c5c3_Var2), templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if !templ_7745c5c3_IsBuffer {
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
+		}
+		return templ_7745c5c3_Err
+	})
+}

views/scripts.templ

@@ -0,0 +1,28 @@
+package views
+
+templ copyTextScript() {
+    <script>
+        function copyText(event, selector) {
+            var pastedContent = document.querySelector(selector);
+
+            // Create a range and select the text
+            var range = document.createRange();
+            range.selectNode(pastedContent);
+            window.getSelection().removeAllRanges();
+            window.getSelection().addRange(range);
+
+            // Copy the selected text
+            if (navigator.clipboard) {
+                navigator.clipboard.writeText(pastedContent.innerText).then(function() {
+                    event.dataset.tooltip = 'Copied!';
+                    event.innerText = 'Copied!';
+                    setTimeout(function() {
+                        event.innerText = 'Copy content';
+                        event.dataset.tooltip = 'Click to copy';
+                        event.blur();
+                    }, 1000);
+                });
+            }
+        }
+    </script>
+}

views/scripts_templ.go

@@ -0,0 +1,35 @@
+// Code generated by templ - DO NOT EDIT.
+
+// templ: version: v0.2.707
+package views
+
+//lint:file-ignore SA4006 This context is only used if a nested component is present.
+
+import "github.com/a-h/templ"
+import "context"
+import "io"
+import "bytes"
+
+func copyTextScript() templ.Component {
+	return templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+		if !templ_7745c5c3_IsBuffer {
+			templ_7745c5c3_Buffer = templ.GetBuffer()
+			defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var1 == nil {
+			templ_7745c5c3_Var1 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<script>\n        function copyText(event, selector) {\n            var pastedContent = document.querySelector(selector);\n\n            // Create a range and select the text\n            var range = document.createRange();\n            range.selectNode(pastedContent);\n            window.getSelection().removeAllRanges();\n            window.getSelection().addRange(range);\n\n            // Copy the selected text\n            if (navigator.clipboard) {\n                navigator.clipboard.writeText(pastedContent.innerText).then(function() {\n                    event.dataset.tooltip = 'Copied!';\n                    event.innerText = 'Copied!';\n                    setTimeout(function() {\n                        event.innerText = 'Copy content';\n                        event.dataset.tooltip = 'Click to copy';\n                        event.blur();\n                    }, 1000);\n                });\n            }\n        }\n    </script>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if !templ_7745c5c3_IsBuffer {
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
+		}
+		return templ_7745c5c3_Err
+	})
+}

views/view.templ

@@ -0,0 +1,19 @@
+package views
+
+templ View() {
+    @base() {
+        <div style="padding-bottom: 5rem;">
+            <hgroup>
+            <h3>View Paste</h3>
+            <p>
+            <small style="color: #8891A4;">
+                You can only view this paste once. Make sure to copy it before you close this page.
+            </small>
+            </p>
+            </hgroup>
+            <form style="width: 33.33%;" method="post">
+                <button type="submit">Show Paste</button>
+            </form>
+        </div>
+    }
+}

views/view_templ.go

@@ -0,0 +1,50 @@
+// Code generated by templ - DO NOT EDIT.
+
+// templ: version: v0.2.707
+package views
+
+//lint:file-ignore SA4006 This context is only used if a nested component is present.
+
+import "github.com/a-h/templ"
+import "context"
+import "io"
+import "bytes"
+
+func View() templ.Component {
+	return templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+		if !templ_7745c5c3_IsBuffer {
+			templ_7745c5c3_Buffer = templ.GetBuffer()
+			defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var1 == nil {
+			templ_7745c5c3_Var1 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		templ_7745c5c3_Var2 := templ.ComponentFunc(func(ctx context.Context, templ_7745c5c3_W io.Writer) (templ_7745c5c3_Err error) {
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templ_7745c5c3_W.(*bytes.Buffer)
+			if !templ_7745c5c3_IsBuffer {
+				templ_7745c5c3_Buffer = templ.GetBuffer()
+				defer templ.ReleaseBuffer(templ_7745c5c3_Buffer)
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<div style=\"padding-bottom: 5rem;\"><hgroup><h3>View Paste</h3><p><small style=\"color: #8891A4;\">You can only view this paste once. Make sure to copy it before you close this page.</small></p></hgroup><form style=\"width: 33.33%;\" method=\"post\"><button type=\"submit\">Show Paste</button></form></div>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			if !templ_7745c5c3_IsBuffer {
+				_, templ_7745c5c3_Err = io.Copy(templ_7745c5c3_W, templ_7745c5c3_Buffer)
+			}
+			return templ_7745c5c3_Err
+		})
+		templ_7745c5c3_Err = base().Render(templ.WithChildren(ctx, templ_7745c5c3_Var2), templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		if !templ_7745c5c3_IsBuffer {
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
+		}
+		return templ_7745c5c3_Err
+	})
+}

web/handlers.go

@@ -0,0 +1,78 @@
+package web
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+
+	"github.com/v1k45/paste/db"
+	"github.com/v1k45/paste/views"
+)
+
+type Handler struct {
+	DB *db.DB
+}
+
+func NewHandler(db *db.DB) *Handler {
+	return &Handler{DB: db}
+}
+
+func (h *Handler) Index(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusOK)
+	component := views.Index()
+	component.Render(context.Background(), w)
+}
+
+func (h *Handler) Paste(w http.ResponseWriter, r *http.Request) {
+	pastedText := r.FormValue("text")
+	if pastedText == "" {
+		errorResponse(w, http.StatusBadRequest, "Invalid Data", "Paste content is required.")
+		return
+	}
+
+	expiresAt, err := getExpiresAt(r.FormValue("expiration"))
+	if err != nil {
+		errorResponse(w, http.StatusBadRequest, "Invalid Data", "Invalid expiration time.")
+		return
+	}
+
+	paste, err := h.DB.NewPaste(pastedText, expiresAt)
+	if err != nil {
+		errorResponse(w, http.StatusInternalServerError, "Internal Server Error", "Failed to create paste, please try again later.")
+		return
+	}
+
+	var scheme string
+	if r.TLS == nil {
+		scheme = "http"
+	} else {
+		scheme = "https"
+	}
+	url := fmt.Sprintf("%s://%s/p/%s/%s", scheme, r.Host, paste.ID, paste.Key)
+
+	component := views.PasteSuccess(url)
+	component.Render(context.Background(), w)
+}
+
+func (h *Handler) View(w http.ResponseWriter, r *http.Request) {
+	if _, err := h.DB.Get(r.PathValue("id")); err != nil {
+		errorResponse(w, http.StatusNotFound, "Not Found", "The paste you are looking for is either expired or does not exist.")
+		return
+	}
+
+	component := views.View()
+	component.Render(context.Background(), w)
+}
+
+func (h *Handler) Decrypt(w http.ResponseWriter, r *http.Request) {
+	decryptedText, err := h.DB.Decrypt(r.PathValue("id"), r.PathValue("key"))
+	if err != nil {
+		errorResponse(
+			w, http.StatusInternalServerError,
+			"Internal Server Error", "The paste you are looking for is either expired, corrputed or does not exist.")
+		return
+	}
+
+	component := views.Decrypt(decryptedText)
+	component.Render(context.Background(), w)
+}

web/routes.go

@@ -0,0 +1,12 @@
+package web
+
+import "net/http"
+
+func (h *Handler) Router() http.Handler {
+	router := http.NewServeMux()
+	router.HandleFunc("GET /", h.Index)
+	router.HandleFunc("POST /", h.Paste)
+	router.HandleFunc("GET /p/{id}/{key}", h.View)
+	router.HandleFunc("POST /p/{id}/{key}", h.Decrypt)
+	return router
+}

web/utils.go

@@ -0,0 +1,35 @@
+package web
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"time"
+
+	"github.com/v1k45/paste/views"
+)
+
+var (
+	expirationTimes = map[string]time.Duration{
+		"1h": time.Hour,
+		"1d": 24 * time.Hour,
+		"1w": 7 * 24 * time.Hour,
+		"2w": 2 * 7 * 24 * time.Hour,
+		"4w": 4 * 7 * 24 * time.Hour,
+	}
+)
+
+func getExpiresAt(expiresAt string) (time.Time, error) {
+	expiresDuration, found := expirationTimes[expiresAt]
+	if !found {
+		return time.Time{}, errors.New("invalid expiration time")
+	}
+
+	return time.Now().Add(expiresDuration), nil
+}
+
+func errorResponse(w http.ResponseWriter, status int, title, message string) {
+	w.WriteHeader(status)
+	component := views.Error(title, message)
+	component.Render(context.Background(), w)
+}