public function cleanup()
{
$productDAO = new ProductDAO(DataSource::getInstance());
$file_names = $productDAO->findAllPics();
$c = clean_upload_images($file_names);
$this->registry->template->deleted_files = $c;
$this->registry->template->tile_title = 'Dọn dẹp thư mục upload';
$this->registry->template->tile_content = 'admin/upload-cleanup.php';
$this->registry->template->show('admin/layout/admin.php');
}
