/**
* Force site regrading
*/
function regrade_all()
{
global $CFG;
require_once "{$CFG->libdir}/gradelib.php";
grade_force_site_regrading();
}
/**
* Saves the new setting.
*
* @param mixed $data
* @return string empty string or error message
*/
function write_setting($data)
{
global $CFG;
$previous = $this->get_setting();
$result = parent::write_setting($data);
// If saved and the value has changed.
if (empty($result) && $previous != $data) {
require_once $CFG->libdir . '/gradelib.php';
grade_force_site_regrading();
}
return $result;
}