/**
* get unread private conversations number
*
* @return Integer
*/
public function getUnreadPcNum()
{
if (MbqMain::hasLogin()) {
//ref __userPanelConversationDropdown.tpl,wcf\system\WCF
return WCF::getConversationHandler()->getUnreadConversationCount();
} else {
MbqError::alert('', __METHOD__ . ',line:' . __LINE__ . '.' . 'Need login!');
}
}