/**
* flag/unflag topic
* @param $topic_id topic id
*/
function flag($topic_id)
{
if (!$topic_id) {
return '<ret>0</ret>';
}
$u = $this->getLoginUser();
if (!$u) {
return '<ret>0</ret>';
}
$db = new DbForum();
if ($db->isFlagged((int) $topic_id, $u)) {
if (!$db->unflag((int) $topic_id, $u)) {
return '<ret>0</ret>';
}
return '<ret>-1</ret>';
}
if (!$db->flag((int) $topic_id, $u)) {
return '<ret>0</ret>';
}
return '<ret>1</ret>';
}
