Sub Forum Mod and index (Page 4 of 5)

foreach ($sfdb as $sub_forums)

                {

                    if ($cur_forum['fid'] == $sub_forums[0] && !$pun_user['is_guest'] && $sub_forums[5] > $pun_user['last_visit'])

                    {

                        $item_status = 'inew';

                        $icon_text = $lang_common['New icon'];

                        $icon_type = 'icon inew';

function forum_is_new($forum_id, $last_post_time) { // this function scares me but I believe all the logic is good.  Have fun :)
    
    global $pun_user, $new_topics;
    
    // first we try to do this the easy way.  
    if ($pun_user['last_visit'] >= $last_post_time) { // were there no posts since the user's last visit?
        return false;
    } else if (!empty($pun_user['read_topics']['f'][$forum_id]) &&    // has the user marked all topics in 
        $pun_user['read_topics']['f'][$forum_id] >= $last_post_time) { // the forum read since the last post?
        return false;
    } else if (empty($pun_user['read_topics']['t']) && empty($pun_user['read_topics']['f'])) { // is it even possible that any of the new posts could be read?
        return true;
    } else {
        // now we must loop through all the "unread" topics in the forum and see if the user has read them.
        foreach($new_topics[$forum_id] as $topic_id => $last_post) {
            if ( // i'll be nice and explain this one for you. if:
                (empty($pun_user['read_topics']['f'][$forum_id]) || // the user hasn't marked the forum read, or
                $pun_user['read_topics']['f'][$forum_id] < $last_post) && // they have but the topic has been posted in since, AND
                (empty($pun_user['read_topics']['t'][$topic_id]) || // the user hasn't marked the topic read, or
                $pun_user['read_topics']['t'][$topic_id] < $last_post) // they have but the topic has been posted in since, then
            )
                return true; // the topic must be new
        }
        return false; // well, since every topic was marked read, then the forum must not have any new posts.
    }
}