<?php
/**
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 *
 * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
 * @author Christoph Wurst <christoph@winzerhof-wurst.at>
 * @author Jörn Friedrich Dreyer <jfd@butonic.de>
 * @author Knut Ahlers <knut@ahlers.me>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Roeland Jago Douma <roeland@famdouma.nl>
 * @author Vincent Petry <vincent@nextcloud.com>
 *
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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, version 3,
 * along with this program. If not, see <http://www.gnu.org/licenses/>
 *
 */
// use OCP namespace for all classes that are considered public.
// This means that they should be used by apps instead of the internal ownCloud classes

namespace OCP;

/**
 * TODO actually this is a IGroupBackend
 *
 * @since 4.5.0
 */
interface GroupInterface {

	/**
	 * actions that user backends can define
	 */
	public const CREATE_GROUP = 0x00000001;
	public const DELETE_GROUP = 0x00000010;
	public const ADD_TO_GROUP = 0x00000100;
	public const REMOVE_FROM_GOUP = 0x00001000; // oops
	public const REMOVE_FROM_GROUP = 0x00001000;
	//OBSOLETE const GET_DISPLAYNAME	= 0x00010000;
	public const COUNT_USERS = 0x00100000;
	public const GROUP_DETAILS = 0x01000000;
	/**
	 * @since 13.0.0
	 */
	public const IS_ADMIN = 0x10000000;

	/**
	 * Check if backend implements actions
	 * @param int $actions bitwise-or'ed actions
	 * @return boolean
	 * @since 4.5.0
	 *
	 * Returns the supported actions as int to be
	 * compared with \OC_Group_Backend::CREATE_GROUP etc.
	 */
	public function implementsActions($actions);

	/**
	 * is user in group?
	 * @param string $uid uid of the user
	 * @param string $gid gid of the group
	 * @return bool
	 * @since 4.5.0
	 *
	 * Checks whether the user is member of a group or not.
	 */
	public function inGroup($uid, $gid);

	/**
	 * Get all groups a user belongs to
	 * @param string $uid Name of the user
	 * @return array an array of group names
	 * @since 4.5.0
	 *
	 * This function fetches all groups a user belongs to. It does not check
	 * if the user exists at all.
	 */
	public function getUserGroups($uid);

	/**
	 * get a list of all groups
	 * @param string $search
	 * @param int $limit
	 * @param int $offset
	 * @return array an array of group names
	 * @since 4.5.0
	 *
	 * Returns a list with all groups
	 */
	public function getGroups($search = '', $limit = -1, $offset = 0);

	/**
	 * check if a group exists
	 * @param string $gid
	 * @return bool
	 * @since 4.5.0
	 */
	public function groupExists($gid);

	/**
	 * get a list of all users in a group
	 * @param string $gid
	 * @param string $search
	 * @param int $limit
	 * @param int $offset
	 * @return array an array of user ids
	 * @since 4.5.0
	 */
	public function usersInGroup($gid, $search = '', $limit = -1, $offset = 0);
}
