Yarik / artbox-webcomment

  <?php

      namespace artbox\webcomment\behaviors;
      
      use artbox\webcomment\models\CommentModel;

      use yii\base\Behavior;

      use yii\db\ActiveRecord;
      
      class ParentBehavior extends Behavior
      {
          
          public function events()
          {
              return [
                  ActiveRecord::EVENT_AFTER_VALIDATE => 'afterValidate',
              ];
          }
          
          /**

           * After validate event

           */

          public function afterValidate()

          {
              /**
               * @var CommentModel $owner
               */
              $owner = $this->owner;

              if (!empty($owner->parent_id)) {

                  /**
                   * @var CommentModel $parent
                   */
                  $parent = CommentModel::find()

                                        ->where([ 'id' => $owner->parent_id ])

                                        ->one();

                  if (!empty($parent->parent_id)) {
                      $owner->related_id = $owner->parent_id;
                      $owner->parent_id = $parent->parent_id;

                  }
              }
          }

      }