/**
* Returns the message groups this message group is part of.
* @since 2011-12-25
* @return array
*/
public static function getParentGroups(MessageGroup $group)
{
// Take the first message, get a handle for it and check
// if that message belongs to other groups. Those are the
// parent aggregate groups. Ideally we loop over all keys,
// but this should be enough.
$keys = array_keys($group->getDefinitions());
$title = Title::makeTitle($group->getNamespace(), $keys[0]);
$handle = new MessageHandle($title);
$ids = $handle->getGroupIds();
foreach ($ids as $index => $id) {
if ($id === $group->getId()) {
unset($ids[$index]);
}
}
return $ids;
}
