/**
* Get current entity identifiers collection by navigation identifier.
*
* @param QueryInterface $query Database query
* @param string $navigationID Navigation identifier
* @param array $return Variable where request result would be returned
* @param array $materialIDs Collection of material identifiers for filtering query
*
* @return bool|array True if field entities has been found and $return is passed
* or collection of identifiers if only two parameters is passed.
*/
public static function idsByNavigationID(QueryInterface $query, $navigationID, &$return = array(), $materialIDs = null)
{
// Prepare query
$query->entity(CMS::FIELD_NAVIGATION_RELATION_ENTITY)->where('StructureID', $navigationID)->where('Active', 1);
// Add material identifier filter if passed
if (isset($materialIDs)) {
$query->where('MaterialID', $materialIDs);
}
// Perform database query and get only material identifiers collection
$return = $query->fields('FieldID');
// If only one argument is passed - return null, otherwise bool
return func_num_args() > 2 ? sizeof($return) : $return;
}
