Horde_Notification_Handler::attach PHP Method

    public function attach($listener, $params = null, $class = null)
    {
        if ($ob = $this->getListener($listener)) {
            return $ob;
        }
        if (is_null($class)) {
            $class = 'Horde_Notification_Listener_' . Horde_String::ucfirst(Horde_String::lower($listener));
        }
        if (class_exists($class)) {
            $this->_listeners[$listener] = new $class($params);
            if (!$this->_storage->exists($listener)) {
                $this->_storage->set($listener, array());
            }
            $this->_addTypes($listener);
            return $this->_listeners[$listener];
        }
        throw new Horde_Exception(sprintf('Notification listener %s not found.', $class));
    }

 /**
  */
 protected function _notify(Horde_Notification_Handler $handler, Horde_Notification_Listener $listener)
 {
     global $injector, $prefs, $session;
     if (!$prefs->getValue('newmail_notify') || !$listener instanceof Horde_Notification_Listener_Status) {
         return;
     }
     /* Rate limit. If rate limit is not yet set, this is the initial
      * login so skip. */
     $curr = time();
     $ratelimit = $session->get('imp', self::SESS_RATELIMIT);
     if ($ratelimit && $ratelimit + self::RATELIMIT > $curr) {
         return;
     }
     $session->set('imp', self::SESS_RATELIMIT, $curr);
     if (!$ratelimit) {
         return;
     }
     $ajax_queue = $injector->getInstance('IMP_Ajax_Queue');
     $imp_imap = $injector->getInstance('IMP_Factory_Imap')->create();
     $recent = array();
     try {
         foreach ($imp_imap->status($injector->getInstance('IMP_Ftree')->poll->getPollList(), Horde_Imap_Client::STATUS_RECENT_TOTAL, array('sort' => true)) as $key => $val) {
             if (!empty($val['recent_total'])) {
                 /* Open the mailbox R/W so we ensure the 'recent' flag is
                  * cleared. */
                 $imp_imap->openMailbox($key, Horde_Imap_Client::OPEN_READWRITE);
                 $mbox = IMP_Mailbox::get($key);
                 $recent[$mbox->display] = $val['recent_total'];
                 $ajax_queue->poll($mbox);
             }
         }
     } catch (Exception $e) {
     }
     if (empty($recent)) {
         return;
     }
     $recent_sum = array_sum($recent);
     reset($recent);
     switch (count($recent)) {
         case 1:
             $mbox_list = key($recent);
             break;
         case 2:
             $mbox_list = implode(_(" and "), array_keys($recent));
             break;
         default:
             $akeys = array_keys($recent);
             $mbox_list = $akeys[0] . ', ' . $akeys[1] . ', ' . _("and") . ' ' . $akeys[2];
             if ($addl_mbox = count($recent) - 3) {
                 $mbox_list .= ' (' . sprintf(ngettext("and %d more mailbox", "and %d more mailboxes", $addl_mbox), $addl_mbox) . ')';
             }
             break;
     }
     $text = sprintf(ngettext("You have %d new mail message in %s.", "You have %d new mail messages in %s.", $recent_sum), $recent_sum, $mbox_list);
     /* Status notification. */
     $handler->push($text, 'horde.message');
     /* Web notifications. */
     $handler->attach('webnotification', null, 'Horde_Core_Notification_Listener_Webnotification');
     $handler->push(Horde_Core_Notification_Event_Webnotification::createEvent($text, array('icon' => strval(Horde_Themes::img('unseen.png')))), 'webnotification');
     if ($audio = $prefs->getValue('newmail_audio')) {
         $handler->attach('audio');
         $handler->push(Horde_Themes::sound($audio), 'audio');
     }
 }