I've rewritten the patch wi now work with the namespace util::whos_online, as well it's possible for users to set them self invisible.
-public
util::whos_online::user_ids (returns a list of user_id's of those users wich have requested a page in the last 10min.)
util::whos_online::all_user_ids (like ::user_ids but even those user_ids wich are invisible are returned)
util::whos_online::all_invisible (return all user_ids wich are invisible and online )
util::whos_online::set_invisible $user_id (Set the user_id to invisible, this state alters when a user gets offline )
util::whos_online::unset_invisible $user_id (Resets the user_id to visible)
util::whos_online::check_invisible $user_id ( returns 'true' if user_id is invisible and 'false' otherwise)
-private
util::whos_online::flush (Cleaning the internal used nsv_sets, run by a Scheduled proc every hour)
The new patch has number #126 .
