Fix: Double notifications when mentioning in comments

protected/humhub/docs/CHANGELOG.md

@@ -3,6 +3,7 @@ HumHub Change Log
 
 1.2.0-beta.3 under developement
 --------------------------------
+- Fix: Double notifications when mentioning in comments
 - Enh: Raised collapse value for posts to full embeded youtube video height
 - Fix: Fixed oembed post edit
 - Enh: Included select2-humhub theme into the new theming

protected/humhub/modules/comment/models/Comment.php

@@ -115,13 +115,16 @@ class Comment extends ContentAddonActiveRecord implements ContentOwner
 
         // Handle mentioned users
         // Execute before NewCommentNotification to avoid double notification when mentioned.
-        \humhub\modules\user\models\Mentioning::parse($this, $this->message);
-
+        $mentionedUsers = \humhub\modules\user\models\Mentioning::parse($this, $this->message);
+        
         if ($insert) {
+            $followers = $this->getCommentedRecord()->getFollowers(null, true);
+            $this->filterMentionings($followers, $mentionedUsers);
+
             \humhub\modules\comment\notifications\NewComment::instance()
                     ->from(Yii::$app->user->getIdentity())
                     ->about($this)
-                    ->sendBulk($this->getCommentedRecord()->getFollowers(null, true, true));
+                    ->sendBulk($followers);
 
             if ($this->content->container) {
                 Yii::$app->live->send(new \humhub\modules\comment\live\NewComment([
@@ -137,6 +140,28 @@ class Comment extends ContentAddonActiveRecord implements ContentOwner
 
         return parent::afterSave($insert, $changedAttributes);
     }
+    
+    /**
+     * Filters out all users contained in $mentionedUsers from $followers
+     *  
+     * @param User[] $followers 
+     * @param User[] $mentionedUsers 
+     */
+    private function filterMentionings(&$followers, $mentionedUsers)
+    {
+        if(empty($mentionedUsers)) {
+            return;
+        }
+        
+        foreach($followers as $i => $follower) {
+            foreach($mentionedUsers as $mentioned) {
+                if($follower->is($mentioned)) {
+                    unset($followers[$i]);
+                    continue 2;
+                }
+            }
+        }
+    }
 
     /**
      * Force search update of underlying content object.

protected/humhub/modules/comment/notifications/NewComment.php

@@ -38,12 +38,21 @@ class NewComment extends \humhub\modules\notification\components\BaseNotificatio
     {
         return new CommentNotificationCategory();
     }
-
+    
+    public function hasMentioning(User $user)
+    {
+        return \humhub\modules\notification\models\Notification::find()->where([
+                    'class' => \humhub\modules\user\notifications\Mentioned::className(),
+                    'user_id' => $user->id,
+                    'source_class' => $this->source->className(),
+                    'source_pk' => $this->source->getPrimaryKey()])->count() > 0;
+    }
+    
     /**
      * @inheritdoc
      */
     public function send(User $user)
-    {
+    {   
         // Check if there is also a mention notification, so skip this notification
         if (\humhub\modules\notification\models\Notification::find()->where([
                     'class' => \humhub\modules\user\notifications\Mentioned::className(),

protected/humhub/modules/post/views/post/edit.php

@@ -28,7 +28,7 @@ use humhub\compat\CActiveForm;
 
         <!-- editSubmit action of surrounding StreamEntry component -->
         <button type="submit" class="btn btn-default btn-sm btn-comment-submit" data-ui-loader data-action-click="editSubmit" data-action-url="<?= $post->content->container->createUrl('/post/post/edit', ['id' => $post->id]) ?>">
-<?= Yii::t('PostModule.views_edit', 'Save') ?>
+            <?= Yii::t('PostModule.views_edit', 'Save') ?>
         </button>
 
     </div>

protected/humhub/modules/user/models/Mentioning.php

@@ -93,12 +93,13 @@ class Mentioning extends ActiveRecord
      *
      * @param HActiveRecordContent|HActiveRecordContentAddon $record
      * @param string $text
+     * @return User[] Mentioned users
      */
     public static function parse($record, $text)
     {
-
+        $result = [];
         if ($record instanceof ContentActiveRecord || $record instanceof ContentAddonActiveRecord) {
-            preg_replace_callback('@\@\-u([\w\-]*?)($|\s|\.)@', function($hit) use(&$record) {
+            preg_replace_callback('@\@\-u([\w\-]*?)($|\s|\.)@', function($hit) use(&$record, &$result) {
                 $user = User::findOne(['guid' => $hit[1]]);
                 if ($user !== null) {
                     // Check the user was already mentioned (e.g. edit)
@@ -107,6 +108,8 @@ class Mentioning extends ActiveRecord
                         $mention = new Mentioning(['user_id' => $user->id]);
                         $mention->setPolymorphicRelation($record);
                         $mention->save();
+                        
+                        $result[] = $user;
 
                         // Mentioned users automatically follows the content
                         $record->content->getPolymorphicRelation()->follow($user->id);
@@ -116,6 +119,7 @@ class Mentioning extends ActiveRecord
         } else {
             throw new Exception("Mentioning can only used in HActiveRecordContent or HActiveRecordContentAddon objects!");
         }
+        return $result;
     }
 
     /**