cleanupMedia example

$this->conn = $conn;
        $this->backupDirectory = $backupDir;
    }

    public function cleanupOldFiles()
    {
        $_SESSION['DB_DONE'] = true;

        $cleanupList = $this->getCleanupList();

        if ($this->request->isPost()) {
            $this->cleanupMedia();
        }

        if (\count($cleanupList) == 0) {
            $_SESSION['CLEANUP_DONE'] = true;
            $this->response->redirect($this->app->urlFor('done'));
        }

        if ($this->request->isPost()) {
            $this->cleanupTemplateRelations();

            $result = [];