public function actionCheckMessage()
 {
     $data = array();
     $date = date('Y-m-d H:i:s', strtotime('-5 seconds'));
     $receiverId = Yii::app()->user->getId();
     $criteria = new CDbCriteria();
     $criteria->condition = "ReceiverId = {$receiverId} AND Date > '" . $date . "'";
     $models = ChatMessage::model()->findAll($criteria);
     if (!empty($models)) {
         foreach ($models as $model) {
             if (MembershipUsers::model()->isSubscribe($model->ReceiverId)) {
                 $data[] = array('UserId' => $model->UserId, 'UserName' => Profile::model()->findByPk($model->UserId)->UserName, 'ReceiverId' => $model->ReceiverId);
             }
         }
         echo json_encode($data);
     }
 }