public static function onUserDelete($event)
 {
     foreach (EmbeddedMedia::findAll(array('created_by' => $event->sender->id)) as $file) {
         $file->delete();
     }
     return true;
 }
 public function actionDelete()
 {
     $this->forcePostRequest();
     $guid = Yii::$app->request->post('guid');
     $file = EmbeddedMedia::findOne(['guid' => $guid]);
     if ($file == null) {
         throw new HttpException(404, Yii::t('EmbeddedMediaModule.controllers_EmbeddedMediaController', 'Could not find requested file!'));
     }
     if (!$file->canDelete()) {
         throw new HttpException(401, Yii::t('EmbeddedMediaModule.controllers_EmbeddedMediaController', 'Insufficient permissions!'));
     }
     $file->delete();
 }