/**
* Process ordering query.
*
* @param JDatabaseQuery $query The query object.
* @param string $ordering The ordering string.
* @param string $direction ASC or DESC.
*
* @return void
*/
protected function processOrdering(JDatabaseQuery $query, $ordering = null, $direction = null)
{
$ordering = $ordering ?: $this->get('list.ordering');
// If no ordering set, ignore this function.
if (!$ordering) {
return;
}
$direction = $direction ?: $this->get('list.direction', 'ASC');
$ordering = explode(',', $ordering);
// Add quote
foreach ($ordering as $key => &$value) {
// Remove extra spaces
preg_replace('/\\s+/', ' ', trim($value));
$value = StringHelper::explode(' ', $value);
if (!$this->filterField($value[0])) {
unset($ordering[$key]);
continue;
}
$value[0] = $this->mapField($value[0]);
// Ignore expression
if (!empty($value[0]) && $value[0][strlen($value[0]) - 1] != ')') {
$value[0] = $query->quoteName($value[0]);
}
$value = implode(' ', $value);
}
$ordering = implode(', ', $ordering);
if (!$ordering) {
return;
}
$query->order($ordering . ' ' . $direction);
}
