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<?php
/**
* @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
*
* @author Robin Appelman <robin@icewind.nl>
*
* @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\Files\Notify;
/**
* Provides access to detected changes in the storage by either actively listening
* or getting the list of changes that happened in the background
*
* @since 12.0.0
*/
interface INotifyHandler {
/**
* Start listening for update notifications
*
* The provided callback will be called for every incoming notification with the following parameters
* - IChange|IRenameChange $change
*
* Note that this call is blocking and will not exit on it's own, to stop listening for notifications return `false` from the callback
*
* @param callable $callback
*
* @since 12.0.0
*/
public function listen(callable $callback);
/**
* Get all changes detected since the start of the notify process or the last call to getChanges
*
* @return IChange[]
*
* @since 12.0.0
*/
public function getChanges();
/**
* Stop listening for changes
*
* Note that any pending changes will be discarded
*
* @since 12.0.0
*/
public function stop();
}