function filterCyclicalGroups($iTargetGroupID, $aGroupMemberships)
{
$aReturnGroupIDs = array();
// PHP5: clone/copy
$aLocalGroupMemberships = $aGroupMemberships;
// In case we get given ourself, we know we can't add ourselves
// to each other.
unset($aLocalGroupMemberships[$iTargetGroupID]);
// Groups that have no group members can safely be added to the
// group. Simplifies debugging of later code.
foreach ($aLocalGroupMemberships as $k => $v) {
if (is_null($v) || !count($v)) {
unset($aLocalGroupMemberships[$k]);
$aReturnGroupIDs[] = $k;
}
}
$aBadGroupIDs = GroupUtil::listBadGroups($iTargetGroupID, $aLocalGroupMemberships);
foreach ($aLocalGroupMemberships as $k => $v) {
if (!in_array($k, $aBadGroupIDs)) {
$aReturnGroupIDs[] = $k;
}
}
return $aReturnGroupIDs;
}
