public function listTorrents(Request $request, TorrentManager $torrentManager)
 {
     try {
         $torrents = $torrentManager->getTorrents();
         $clientUpdating = false;
         usort($torrents, function ($a, $b) {
             return strcmp($a['name'], $b['name']);
         });
     } catch (ServiceUnvailableException $e) {
         $torrents = array();
         $clientUpdating = true;
     }
     return $this->render(array('torrents' => $torrents, 'client_updating' => $clientUpdating));
 }