/**
* Returns array of group ids of descendent groups of the specified group.
*
* @param array $groupIds
* An array of valid group ids (passed by reference).
*
* @param bool $includeSelf
* @return array
* List of groupIds that represent the requested group and its descendents
*/
public static function getDescendentGroupIds($groupIds, $includeSelf = TRUE)
{
if (!is_array($groupIds)) {
$groupIds = array($groupIds);
}
$dao = new CRM_Contact_DAO_GroupNesting();
$query = "SELECT child_group_id, parent_group_id FROM civicrm_group_nesting WHERE parent_group_id IN (" . implode(',', $groupIds) . ")";
$dao->query($query);
$tmpGroupIds = array();
$childGroupIds = array();
if ($includeSelf) {
$childGroupIds = $groupIds;
}
while ($dao->fetch()) {
// make sure we're not following any cyclical references
if (!array_key_exists($dao->parent_group_id, $childGroupIds) && $dao->child_group_id != $groupIds[0]) {
$tmpGroupIds[] = $dao->child_group_id;
}
}
if (!empty($tmpGroupIds)) {
$newChildGroupIds = self::getDescendentGroupIds($tmpGroupIds);
$childGroupIds = array_merge($childGroupIds, $newChildGroupIds);
}
return $childGroupIds;
}
