getcurrentdraft

public function getCurrentDraft($ticketId, $userId, $text = false)
    {
        $collection = Mage::getModel('helpdesk/draft')->getCollection()
                ->addFieldToFilter('ticket_id', $ticketId);
        if ($collection->count()) {
            $draft = $collection->getFirstItem();
        } else {
            $draft = Mage::getModel('helpdesk/draft');
            $draft->setTicketId($ticketId);
        }
        $usersOnline = $draft->getUsersOnline();
        $timeNow = Mage::getSingleton('core/date')->gmtTimestamp();
        $usersOnline[$userId] = $timeNow;
        foreach ($usersOnline as $uId => $timestamp) {
            if ($uId == $userId) {
                continue;
            }
            if ($timestamp + 20 < $timeNow) { //other user went offline from this page
                unset($usersOnline[$uId]);
                continue;
            }
        }
        $draft->setUsersOnline($usersOnline);
        if ($text !== false) {
            $draft->setBody($text);
            $draft->setUpdatedBy($userId);
            $draft->setUpdatedAt(Mage::getSingleton('core/date')->gmtDate());
        }
        $draft->save();

        return $draft;
    }