function __construct($catid = null)
{
$this->_db = JFactory::getDBO();
$this->_my = JFactory::getUser();
$this->_session = KunenaFactory::getSession();
$this->_config = KunenaFactory::getConfig();
$this->_isimage = false;
$this->_isfile = false;
$me = KunenaUserHelper::getMyself();
$this->validImageExts = (array) KunenaForumMessageAttachmentHelper::getImageExtensions($catid, $me->userid);
$this->validFileExts = (array) KunenaForumMessageAttachmentHelper::getFileExtensions($catid, $me->userid);
$this->setImageResize(intval($this->_config->imagesize) * 1024, intval($this->_config->imagewidth), intval($this->_config->imageheight), intval($this->_config->imagequality));
}
