public function __construct() {

		if ( ! defined( 'LLMS_BG_UPDATE_LOG' ) ) {
			define( 'LLMS_BG_UPDATE_LOG', true );
		}

		$this->add_actions();

		$progress = $this->get_progress();

		switch ( $progress['status'] ) {

			// Start the update.
			case 'pending':
				$this->start();
				break;

			case 'finished':
				break;

			// Check progress.
			case 'running':
			default:
				if ( is_admin() && ! defined( 'DOING_CRON' ) ) {
					$this->output_progress_notice( $progress );
				}
				$this->check_progress( $progress );
				break;

		}

	}