/**
* Treats a <orderby> node and its children <field> nodes
*
* @param SimpleXmlElement $orderby
* @param string $selectedOrderingGroup The ordergroup to select and use for ordering
*/
public function process_orderby($orderby, $selectedOrderingGroup = null)
{
if ($orderby) {
if ($selectedOrderingGroup) {
$this->process_orderby($orderby->getChildByNameAttr('ordergroup', 'name', $selectedOrderingGroup));
return;
}
foreach ($orderby->children() as $o) {
/** @var $o SimpleXmlElement */
if ($o->getName() == 'field') {
list($fieldsArray) = $this->get_field($o);
$this->processJoinsNeededForCount($fieldsArray);
$this->orderArray[] = array_pop($fieldsArray) . ($o->attributes('ordering') === 'DESC' ? ' DESC' : '');
} elseif ($o->getName() == 'ordergroup') {
continue;
} else {
trigger_error('SQLXML::process_orderby: child type ' . $o->getName() . ' of orderby is not implemented !', E_USER_NOTICE);
}
}
}
}