<?php

declare(strict_types=1);

/**
 * @copyright Copyright (c) 2019 Arthur Schiwon <blizzz@arthur-schiwon.de>
 *
 * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
 *
 * @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/>.
 *
 */

namespace OCP\WorkflowEngine;

/**
 * Interface IComplexOperation
 *
 * This interface represents an operator that is less generic and indicates
 * that some of the tasks it does itself instead of relying on the engine.
 * This includes:
 *
 * * registering listeners – the implementing app needs to ensure that the
 *   business logic registers listeners to the events it listens to. For example
 *   when direct storage access is required, adding a wrapper or listening to
 *   a specific one is required over usual file events.
 *
 * @package OCP\WorkflowEngine
 *
 * @since 18.0.0
 */
interface IComplexOperation extends IOperation {

	/**
	 * As IComplexOperation chooses the triggering events itself, a hint has
	 * to be shown to the user so make clear when this operation is becoming
	 * active. This method returns such a translated string.
	 *
	 * Example: "When a file is accessed" (en)
	 *
	 * @since 18.0.0
	 */
	public function getTriggerHint(): string;

}