subforums - list by last post

[alla n1015]

Hi,

Im on a project to try and make subforums display in order of last post made, I mean subforums on the 2cd level pages, (forumdiusplay.php) not home page.

Reverse engineering is getting time consuming, just thought Id ask if anyone has done this, and /or can point me to areas of code that might be places to touch.

Allan

[cheesegrits]

I think you'd need to plugin to the forumdisplay_start hook and re-order $vbulletin->iforumcache[] according to the lastpost data in the forumcache.

Something like:

function lastpost_sort ($a, $b) {
global $vbulletin;
if ($vbulletin->forumcache[$a]['lastpost'] == $vbulletin->forumcache[$b]['lastpost'])
{
return 0;
}
else
{
return ($vbulletin->forumcache[$a]['lastpost'] > $vbulletin->forumcache[$b]['lastpost'] ? -1 : 1);
}
}

uksort($vbulletin->iforumcache[$vbulletin->GPC['forumid']], 'lastpost_sort');


-- hugh

--------------- Added 1201676889 at 1201676889 ---------------

Well poop. That won't work because cache_ordered_forums(), which builds the iforumcache, is called AFTER forumdisplay_start.

There's a hook in cache_ordered_forums itself, but I'm still trying to work out how to use it.

I'm needing to do almost exactly the same thing, so I hope I'll find a workaround soon ...

-- hugh

--------------- Added 1201712842 at 1201712842 ---------------

Well, good news for me, bad news for you. I worked out how to do this for my requirement (which uses some fields I added to the forum table, for forum rating). Uses this code on forumdisplay_start, which is very similar to the code I first posted, but sorts the actual forumcache, not the iforumcache. Turns out the iforumcache is simply derived from the ordering of forumcache:

<?php
function forumrate_sort ($a, $b) {
global $vbulletin;
if ($vbulletin->forumcache[$a]['votetotal'] == $vbulletin->forumcache[$b]['votetotal'])
{
return 0;
}
else
{
return ($vbulletin->forumcache[$a]['votetotal'] < $vbulletin->forumcache[$b]['votetotal'] ? -1 : 1);
}
}

uksort($vbulletin->forumcache, 'forumrate_sort');
?>

Theoretically, this should work for you by just using 'lastpost' instead of 'votetotal'. But for reasons I don't understand, 'lastpost' isn't in the forumcache. Even though I can see it in the serialized data in my datastore table when init.php run the datastore->fetch().

-- hugh

--------------- Added 1201716914 at 1201716914 ---------------

OK, I finally got this to work. It's one of those chicken and egg problems. The 'lastpost' info is added to the forumcache by cache_ordered_forums(), but the only hook we can use is called before cache_ordered_forums(). So the only solution I can find is to modify the above code, and add a call to cache_ordered_forums() before the uksort().

This works, but adds a query to the forumdisplay page load, because forumdisplay is going to call cache_ordered_forums() again after our hook runs (but this time, it'll build it from our re-ordered forumcache).

If you can live with this, then the following code (still on the forumdisplay_start hook) does what you want. Tested in 3.7b3, but should work on 3.6:

<?php
function forumrate_sort ($a, $b) {
global $vbulletin;
if ($vbulletin->forumcache[$a]['lastpost'] == $vbulletin->forumcache[$b]['lastpost'])
{
return 0;
}
else
{
return ($vbulletin->forumcache[$a]['lastpost'] > $vbulletin->forumcache[$b]['lastpost'] ? -1 : 1);
}
}
cache_ordered_forums(1, 1);
uksort($vbulletin->forumcache, 'forumrate_sort');
?>

You might want to "unset($vbulletin->iforumcache);" as the last line, just in case.

-- hugh