/**
* Saves the backup controller.
*
* Once this has been called nothing else can be changed in the controller.
*
* @return bool
*/
public function save_controller()
{
if ($this->progress >= self::PROGRESS_SAVED) {
throw new base_ui_exception('backupuialreadysaved');
}
$this->progress = self::PROGRESS_SAVED;
// First enforce dependencies
$this->enforce_dependencies();
// Process UI event after to check any changes are valid
$this->controller->process_ui_event();
// Save the controller
$this->controller->save_controller();
return true;
}