/**
  * @param array $params
  *
  * @return string
  */
 public function toHref($params = [])
 {
     return $this->notification->getPoster()->toHref($params);
 }
 /**
  * Send new notification to receiver(parent) from poster(sender)
  *
  * @param string                           $type
  * @param PosterInterface                  $poster
  * @param PosterInterface                  $parent
  * @param ContentInterface|PosterInterface $about
  * @param                                  $params
  *
  * @return Platform\Notification
  */
 public function addNotification($type, PosterInterface $poster, PosterInterface $parent, $about = null, $params = [])
 {
     if (!$about) {
         $about = $poster;
     }
     $data = ['type_id' => $type, 'poster_id' => $poster->getId(), 'user_id' => $poster->getUserId(), 'parent_id' => $parent->getId(), 'parent_user_id' => $parent->getUserId(), 'poster_type' => $poster->getType(), 'parent_type' => $parent->getType(), 'about_type' => $about->getType(), 'about_id' => $about->getId(), 'params' => json_encode($params), 'created_at' => KENDO_DATE_TIME];
     if (null != $about) {
         $data = array_merge($data, ['about_id' => $about->getId(), 'about_type' => $about->getType()]);
     }
     $item = new Notification($data);
     $item->save();
     return $item;
 }