From 4a75a503703a481a998136021ef1fd495ddc5f91 Mon Sep 17 00:00:00 2001
From: Thomas Miceli <27960254+thomiceli@users.noreply.github.com>
Date: Fri, 26 May 2023 09:15:37 +0200
Subject: [PATCH] Disable Gravatar (#37)

* Disable Gravatar
* Lowercase emails
* Add migration
---
 README.md                           |   2 +-
 fs_embed.go                         |   2 +-
 internal/models/admin_setting.go    |   1 +
 internal/models/db.go               |   1 +
 internal/models/migration.go        |   7 +++++
 internal/models/user.go             |  35 ++++++++++++++++++++--
 internal/web/auth.go                |  44 +++++++++++++++++++++++++++-
 internal/web/gist.go                |  14 +++++++++
 internal/web/run.go                 |  24 +++++++++++----
 internal/web/settings.go            |   2 +-
 public/default.png                  | Bin 0 -> 15655 bytes
 public/main.ts                      |   1 +
 templates/pages/admin_settings.html |  11 +++++++
 templates/pages/all.html            |   2 +-
 templates/pages/forks.html          |   2 +-
 templates/pages/likes.html          |   2 +-
 templates/pages/revisions.html      |   5 ++--
 17 files changed, 138 insertions(+), 17 deletions(-)
 create mode 100644 public/default.png

diff --git a/README.md b/README.md
index cb8d923..6f0fabb 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ A self-hosted pastebin **powered by Git**. [Try it here](https://opengist.thomic
 * Editor with indentation mode & size ; drag and drop files
 * Download raw files or as a ZIP archive
 * OAuth2 login with GitHub and Gitea
-* Avatars
+* Avatars via Gravatar or OAuth2 providers
 * Responsive UI
 * Enable or disable signups
 * Restrict or unrestrict snippets visibility to anonymous users
diff --git a/fs_embed.go b/fs_embed.go
index a54d661..30d7fd4 100644
--- a/fs_embed.go
+++ b/fs_embed.go
@@ -4,5 +4,5 @@ package main
 
 import "embed"
 
-//go:embed templates/*/*.html public/manifest.json public/assets/*.js public/assets/*.css public/assets/*.svg
+//go:embed templates/*/*.html public/manifest.json public/assets/*.js public/assets/*.css public/assets/*.svg public/assets/*.png
 var dirFS embed.FS
diff --git a/internal/models/admin_setting.go b/internal/models/admin_setting.go
index 0cfae52..e23e938 100644
--- a/internal/models/admin_setting.go
+++ b/internal/models/admin_setting.go
@@ -13,6 +13,7 @@ const (
 	SettingDisableSignup    = "disable-signup"
 	SettingRequireLogin     = "require-login"
 	SettingDisableLoginForm = "disable-login-form"
+	SettingDisableGravatar  = "disable-gravatar"
 )
 
 func GetSetting(key string) (string, error) {
diff --git a/internal/models/db.go b/internal/models/db.go
index 540d539..4a417ca 100644
--- a/internal/models/db.go
+++ b/internal/models/db.go
@@ -30,6 +30,7 @@ func Setup(dbpath string) error {
 		SettingDisableSignup:    "0",
 		SettingRequireLogin:     "0",
 		SettingDisableLoginForm: "0",
+		SettingDisableGravatar:  "0",
 	})
 }
 
diff --git a/internal/models/migration.go b/internal/models/migration.go
index d4d7629..3240bf0 100644
--- a/internal/models/migration.go
+++ b/internal/models/migration.go
@@ -28,6 +28,7 @@ func ApplyMigrations(db *gorm.DB) error {
 		Func    func(*gorm.DB) error
 	}{
 		{1, v1_modifyConstraintToSSHKeys},
+		{2, v2_lowercaseEmails},
 		// Add more migrations here as needed
 	}
 
@@ -94,3 +95,9 @@ func v1_modifyConstraintToSSHKeys(db *gorm.DB) error {
 	renameSQL := `ALTER TABLE ssh_keys_temp RENAME TO ssh_keys;`
 	return db.Exec(renameSQL).Error
 }
+
+func v2_lowercaseEmails(db *gorm.DB) error {
+	// Copy the lowercase emails into the new column
+	copySQL := `UPDATE users SET email = lower(email);`
+	return db.Exec(copySQL).Error
+}
diff --git a/internal/models/user.go b/internal/models/user.go
index 73682e2..9208d0d 100644
--- a/internal/models/user.go
+++ b/internal/models/user.go
@@ -12,6 +12,7 @@ type User struct {
 	CreatedAt int64
 	Email     string
 	MD5Hash   string // for gravatar, if no Email is specified, the value is random
+	AvatarURL string
 	GithubID  string
 	GiteaID   string
 
@@ -81,6 +82,30 @@ func GetUserById(userId uint) (*User, error) {
 	return user, err
 }
 
+func GetUsersFromEmails(emailsSet map[string]struct{}) (map[string]*User, error) {
+	var users []*User
+
+	emails := make([]string, 0, len(emailsSet))
+	for email := range emailsSet {
+		emails = append(emails, email)
+	}
+
+	err := db.
+		Where("email IN ?", emails).
+		Find(&users).Error
+
+	if err != nil {
+		return nil, err
+	}
+
+	userMap := make(map[string]*User)
+	for _, user := range users {
+		userMap[user.Email] = user
+	}
+
+	return userMap, nil
+}
+
 func SSHKeyExistsForUser(sshKey string, userId uint) (*SSHKey, error) {
 	key := new(SSHKey)
 	err := db.
@@ -135,9 +160,15 @@ func (user *User) HasLiked(gist *Gist) (bool, error) {
 func (user *User) DeleteProviderID(provider string) error {
 	switch provider {
 	case "github":
-		return db.Model(&user).Update("github_id", nil).Error
+		return db.Model(&user).
+			Update("github_id", nil).
+			Update("avatar_url", nil).
+			Error
 	case "gitea":
-		return db.Model(&user).Update("gitea_id", nil).Error
+		return db.Model(&user).
+			Update("gitea_id", nil).
+			Update("avatar_url", nil).
+			Error
 	}
 
 	return nil
diff --git a/internal/web/auth.go b/internal/web/auth.go
index a904ce4..2db5af0 100644
--- a/internal/web/auth.go
+++ b/internal/web/auth.go
@@ -3,6 +3,7 @@ package web
 import (
 	"context"
 	"crypto/md5"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"github.com/labstack/echo/v4"
@@ -139,12 +140,14 @@ func oauthCallback(ctx echo.Context) error {
 
 	currUser := getUserLogged(ctx)
 	if currUser != nil {
-		// if user is logged in, link account to user
+		// if user is logged in, link account to user and update its avatar URL
 		switch user.Provider {
 		case "github":
 			currUser.GithubID = user.UserID
+			currUser.AvatarURL = getAvatarUrlFromProvider("github", user.UserID)
 		case "gitea":
 			currUser.GiteaID = user.UserID
+			currUser.AvatarURL = getAvatarUrlFromProvider("gitea", user.NickName)
 		}
 
 		if err = currUser.Update(); err != nil {
@@ -172,11 +175,14 @@ func oauthCallback(ctx echo.Context) error {
 			MD5Hash:  fmt.Sprintf("%x", md5.Sum([]byte(strings.ToLower(strings.TrimSpace(user.Email))))),
 		}
 
+		// set provider id and avatar URL
 		switch user.Provider {
 		case "github":
 			userDB.GithubID = user.UserID
+			userDB.AvatarURL = getAvatarUrlFromProvider("github", user.UserID)
 		case "gitea":
 			userDB.GiteaID = user.UserID
+			userDB.AvatarURL = getAvatarUrlFromProvider("gitea", user.NickName)
 		}
 
 		if err = userDB.Create(); err != nil {
@@ -328,3 +334,39 @@ func trimGiteaUrl() string {
 
 	return giteaUrl
 }
+
+func getAvatarUrlFromProvider(provider string, identifier string) string {
+	fmt.Println("getAvatarUrlFromProvider", provider, identifier)
+	switch provider {
+	case "github":
+		return "https://avatars.githubusercontent.com/u/" + identifier + "?v=4"
+	case "gitea":
+		resp, err := http.Get("https://gitea.com/api/v1/users/" + identifier)
+		if err != nil {
+			log.Error().Err(err).Msg("Cannot get user from Gitea")
+			return ""
+		}
+		defer resp.Body.Close()
+
+		body, err := io.ReadAll(resp.Body)
+		if err != nil {
+			log.Error().Err(err).Msg("Cannot read Gitea response body")
+			return ""
+		}
+
+		var result map[string]interface{}
+		err = json.Unmarshal(body, &result)
+		if err != nil {
+			log.Error().Err(err).Msg("Cannot unmarshal Gitea response body")
+			return ""
+		}
+
+		field, ok := result["avatar_url"]
+		if !ok {
+			log.Error().Msg("Field 'avatar_url' not found in Gitea JSON response")
+			return ""
+		}
+		return field.(string)
+	}
+	return ""
+}
diff --git a/internal/web/gist.go b/internal/web/gist.go
index acee492..9778f31 100644
--- a/internal/web/gist.go
+++ b/internal/web/gist.go
@@ -186,8 +186,22 @@ func revisions(ctx echo.Context) error {
 		return errorRes(404, "Page not found", nil)
 	}
 
+	emailsSet := map[string]struct{}{}
+	for _, commit := range commits {
+		if commit.AuthorEmail == "" {
+			continue
+		}
+		emailsSet[strings.ToLower(commit.AuthorEmail)] = struct{}{}
+	}
+
+	emailsUsers, err := models.GetUsersFromEmails(emailsSet)
+	if err != nil {
+		return errorRes(500, "Error fetching users emails", err)
+	}
+
 	setData(ctx, "page", "revisions")
 	setData(ctx, "revision", "HEAD")
+	setData(ctx, "emails", emailsUsers)
 	setData(ctx, "htmlTitle", "Revision of "+gist.Title)
 
 	return html(ctx, "revisions.html")
diff --git a/internal/web/run.go b/internal/web/run.go
index 3f0f0dd..dc5d0cc 100644
--- a/internal/web/run.go
+++ b/internal/web/run.go
@@ -2,7 +2,6 @@ package web
 
 import (
 	"context"
-	"crypto/md5"
 	"encoding/json"
 	"fmt"
 	"github.com/gorilla/sessions"
@@ -71,11 +70,16 @@ var fm = template.FuncMap{
 	"slug": func(s string) string {
 		return strings.Trim(re.ReplaceAllString(strings.ToLower(s), "-"), "-")
 	},
-	"avatarUrl": func(userHash string) string {
-		return "https://www.gravatar.com/avatar/" + userHash + "?d=identicon&s=200"
-	},
-	"emailToMD5": func(email string) string {
-		return fmt.Sprintf("%x", md5.Sum([]byte(strings.ToLower(strings.TrimSpace(email)))))
+	"avatarUrl": func(user *models.User, noGravatar bool) string {
+		if user.AvatarURL != "" {
+			return user.AvatarURL
+		}
+
+		if user.MD5Hash != "" && !noGravatar {
+			return "https://www.gravatar.com/avatar/" + user.MD5Hash + "?d=identicon&s=200"
+		}
+
+		return defaultAvatar()
 	},
 	"asset": func(jsfile string) string {
 		if dev {
@@ -83,6 +87,7 @@ var fm = template.FuncMap{
 		}
 		return "/" + manifestEntries[jsfile].File
 	},
+	"defaultAvatar": defaultAvatar,
 }
 
 var EmbedFS fs.FS
@@ -364,3 +369,10 @@ func parseManifestEntries() {
 		log.Fatal().Err(err).Msg("Failed to unmarshal manifest.json")
 	}
 }
+
+func defaultAvatar() string {
+	if dev {
+		return "http://localhost:16157/default.png"
+	}
+	return "/" + manifestEntries["default.png"].File
+}
diff --git a/internal/web/settings.go b/internal/web/settings.go
index 4e4a3d5..fd6f0d3 100644
--- a/internal/web/settings.go
+++ b/internal/web/settings.go
@@ -37,7 +37,7 @@ func emailProcess(ctx echo.Context) error {
 		hash = fmt.Sprintf("%x", md5.Sum([]byte(strings.ToLower(strings.TrimSpace(email)))))
 	}
 
-	user.Email = email
+	user.Email = strings.ToLower(email)
 	user.MD5Hash = hash
 
 	if err := user.Update(); err != nil {
diff --git a/public/default.png b/public/default.png
new file mode 100644
index 0000000000000000000000000000000000000000..af51e5d5f5868d74fe3f51f718a121879d928a60
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literal 0
HcmV?d00001

diff --git a/public/main.ts b/public/main.ts
index a4b997e..86d36fc 100644
--- a/public/main.ts
+++ b/public/main.ts
@@ -2,6 +2,7 @@ import 'highlight.js/styles/tokyo-night-dark.css';
 import './style.css';
 import './markdown.css';
 import './favicon.svg';
+import './default.png';
 import moment from 'moment';
 import md from 'markdown-it';
 import hljs from 'highlight.js';
diff --git a/templates/pages/admin_settings.html b/templates/pages/admin_settings.html
index 4782b67..77e5cc8 100644
--- a/templates/pages/admin_settings.html
+++ b/templates/pages/admin_settings.html
@@ -37,6 +37,17 @@
                 </button>
             </div>
         </li>
+        <li class="list-none gap-x-4 py-5">
+            <div class="flex items-center justify-between">
+                <span class="flex flex-grow flex-col">
+                    <span class="text-sm font-medium leading-6 text-slate-300">Disable Gravatar</span>
+                    <span class="text-sm text-gray-400">Disable the usage of Gravatar as an avatar provider.</span>
+                </span>
+                <button type="button" id="disable-gravatar" data-bool="{{ .DisableGravatar }}" class="toggle-button {{ if .DisableGravatar }}bg-primary-600{{else}}bg-gray-400{{end}} relative inline-flex h-6 w-11 ml-4 flex-shrink-0 cursor-pointer rounded-full border-2 border-transparent transition-colors duration-200 ease-in-out focus:outline-none focus:ring-2 focus:ring-primary-600 focus:ring-offset-2" role="switch" aria-checked="false" aria-labelledby="availability-label" aria-describedby="availability-description">
+                    <span aria-hidden="true" class="{{ if .DisableGravatar }}translate-x-5{{else}}translate-x-0{{end}} pointer-events-none inline-block h-5 w-5 transform rounded-full bg-white shadow ring-0 transition duration-200 ease-in-out"></span>
+                </button>
+            </div>
+        </li>
     </ul>
     {{ .csrfHtml }}
 </div>
diff --git a/templates/pages/all.html b/templates/pages/all.html
index 1dd2be2..9496389 100644
--- a/templates/pages/all.html
+++ b/templates/pages/all.html
@@ -5,7 +5,7 @@
             {{if .fromUser}}
             <div class="flex items-center">
                 <div class="flex-shrink-0">
-                    <img class="h-12 w-12 rounded-md mr-2 border border-gray-700" src="{{ avatarUrl .fromUser.MD5Hash }}" alt="">
+                    <img class="h-12 w-12 rounded-md mr-2 border border-gray-700" src="{{ avatarUrl .fromUser .DisableGravatar }}" alt="">
                 </div>
                 <div>
                     <h1 class="text-2xl font-bold leading-tight">{{.fromUser.Username}}</h1>
diff --git a/templates/pages/forks.html b/templates/pages/forks.html
index 417736e..93cd1b9 100644
--- a/templates/pages/forks.html
+++ b/templates/pages/forks.html
@@ -8,7 +8,7 @@
                 {{ range $gist := .forks }}
                 <li class="flex py-4">
                     <a href="/{{ $gist.User.Username }}">
-                        <img class="h-12 w-12 rounded-md mr-2 border border-gray-700" src="{{ avatarUrl $gist.User.MD5Hash }}" alt="">
+                        <img class="h-12 w-12 rounded-md mr-2 border border-gray-700" src="{{ avatarUrl $gist.User $.DisableGravatar }}" alt="">
                     </a>
                     <div>
                         <a href="/{{ $gist.User.Username }}" class="text-sm font-medium text-slate-300">{{ $gist.User.Username }}</a>
diff --git a/templates/pages/likes.html b/templates/pages/likes.html
index 8269f14..b7ed806 100644
--- a/templates/pages/likes.html
+++ b/templates/pages/likes.html
@@ -6,7 +6,7 @@
             {{ range $user := .likers }}
                 <div class="relative flex items-center space-x-3 rounded-lg border border-gray-600 bg-gray-800 px-6 py-5 shadow-sm focus-within:ring-1 focus-within:border-primary-500 focus-within:ring-primary-500 hover:border-gray-400">
                     <div class="min-w-0 flex">
-                        <img class="h-12 w-12 rounded-md mr-2 border border-gray-700" src="{{ avatarUrl $user.MD5Hash }}" alt="">
+                        <img class="h-12 w-12 rounded-md mr-2 border border-gray-700" src="{{ avatarUrl $user $.DisableGravatar }}" alt="">
                         <a href="/{{ $user.Username }}" class="focus:outline-none">
                             <span class="absolute inset-0" aria-hidden="true"></span>
                             <p class="text-sm font-medium text-slate-300 align-middle">{{ $user.Username }}</p>
diff --git a/templates/pages/revisions.html b/templates/pages/revisions.html
index f332daa..419e2e6 100644
--- a/templates/pages/revisions.html
+++ b/templates/pages/revisions.html
@@ -10,8 +10,9 @@
                 <svg xmlns="http://www.w3.org/2000/svg" class="h-3 w-3 mr-1 inline" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
                     <path stroke-linecap="round" stroke-linejoin="round" d="M13 5l7 7-7 7M5 5l7 7-7 7" />
                 </svg>
-                <img class="h-5 w-5 rounded-full inline" src="{{ avatarUrl (emailToMD5 $commit.AuthorEmail) }}" alt="" />
-                <span class="font-bold">{{ $commit.AuthorName }}</span> revised this gist <span class="moment-timestamp font-bold">{{ $commit.Timestamp }}</span>. <a href="/{{ $.gist.User.Username }}/{{ $.gist.Uuid }}/rev/{{ $commit.Hash }}">Go to revision</a></h3>
+                {{ $user := (index $.emails $commit.AuthorEmail) }}
+                <img class="h-5 w-5 rounded-full inline" src="{{if $user }}{{ avatarUrl $user $.DisableGravatar }}{{else}}{{defaultAvatar}}{{end}}" alt="" />
+                <span class="font-bold">{{if $user}}<a href="/{{$user.Username}}" class="text-slate-300 hover:text-slate-300 hover:underline">{{ $commit.AuthorName }}</a>{{else}}{{ $commit.AuthorName }}{{end}}</span> revised this gist <span class="moment-timestamp font-bold">{{ $commit.Timestamp }}</span>. <a href="/{{ $.gist.User.Username }}/{{ $.gist.Uuid }}/rev/{{ $commit.Hash }}">Go to revision</a></h3>
                 {{ if ne $commit.Changed "" }}
                     <p class="text-sm float-right py-2">
                     <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5 inline-flex">