nextcloud-server/lib/private/Authentication/Login/ALoginCommand.php

<?php
/**
 * @copyright 2019 Christoph Wurst <christoph@winzerhof-wurst.at>
 *
 * @author 2019 Christoph Wurst <christoph@winzerhof-wurst.at>
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

declare(strict_types=1);

namespace OC\Authentication\Login;

abstract class ALoginCommand {

	/** @var ALoginCommand */
	protected $next;

	public function setNext(ALoginCommand $next): ALoginCommand {
		$this->next = $next;
		return $next;
	}

	protected function processNextOrFinishSuccessfully(LoginData $loginData): LoginResult {
		if ($this->next !== null) {
			return $this->next->process($loginData);
		} else {
			return LoginResult::success($loginData);
		}
	}

	public abstract function process(LoginData $loginData): LoginResult;

}