public function actionVerifyUser($user_id)
 {
     $user = User::model()->findByPk($user_id);
     Yii::log($user->user_group_id, 'log');
     if ($user->verify()) {
         Yii::app()->user->setFlash('success', $user->username . '\'s account is now verified.');
         switch ($user->user_group_id) {
             case Student::USER_GROUP_ID:
                 Emailer::emailStudentVerified($user);
                 break;
             case Employer::USER_GROUP_ID:
                 Emailer::emailEmployerVerified($user);
                 break;
         }
     } else {
         Yii::app()->user->setFlash('error', $user->username . '\'s account could not be verified.');
     }
     if (!Yii::app()->request->isAjaxRequest) {
         switch ($user->user_group_id) {
             case Student::USER_GROUP_ID:
                 $this->redirect(array('verifyStudents'));
             case Employer::USER_GROUP_ID:
                 $this->redirect(array('verifyEmployers'));
             default:
                 $this->redirect(array('admin'));
         }
     }
 }