/**
  * The default action - show the home page
  */
 public function groupAction()
 {
     $user = $this->authenticate();
     // group view
     $feedId = (int) $this->getRequest()->getParam('feedId');
     if (!$feedId) {
         $feedId = Feeds::ROOT_GROUP_ID;
     }
     $currentFeed = $this->feeds->get($feedId);
     // get predessecors
     $this->view->parents = $this->feeds->listParents($feedId);
     if ($this->view->parents === null) {
         $this->view->parents = array();
         // XXX error!
     }
     $this->view->feed = $currentFeed;
     $visibleFeeds = $this->getSubscriptions($user['id'], $currentFeed);
     $this->view->feeds = $visibleFeeds;
     $this->view->user = $user;
 }