/**
* Check and set data to sort return comparation function
* $field field to compare
* $descending order
*/
public static function set_order($field, $ascending = true)
{
$sortfields = array('name' => array('name'), 'shortdescription' => array('shortdescription'), 'startdate' => array('startdate', 'duedate', 'name'), 'duedate' => array('duedate', 'startdate', 'name'), 'automaticgrading' => array('automaticgrading', 'duedate', 'name'));
if (isset($sortfields[$field])) {
self::$fields = $sortfields[$field];
} else {
//Unknow field
self::$fields = $sortfields['duedate'];
}
if ($ascending) {
self::$ascending = -1;
} else {
self::$ascending = 1;
}
}
