<?php
/**
 * @author Joas Schilling <nickvergessen@owncloud.com>
 * @author Morris Jobke <hey@morrisjobke.de>
 * @author Tom Needham <tom@owncloud.com>
 *
 * @copyright Copyright (c) 2015, ownCloud, Inc.
 * @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/>
 *
 */

namespace OCA\Provisioning_API;

use \OC_OCS_Result;
use \OC_Group;
use \OC_SubAdmin;

class Groups{

	/**
	 * returns a list of groups
	 */
	public static function getGroups($parameters){
		$search = !empty($_GET['search']) ? $_GET['search'] : '';
		$limit = !empty($_GET['limit']) ? $_GET['limit'] : null;
		$offset = !empty($_GET['offset']) ? $_GET['offset'] : null;
		return new OC_OCS_Result(array('groups' => OC_Group::getGroups($search, $limit, $offset)));
	}

	/**
	 * returns an array of users in the group specified
	 */
	public static function getGroup($parameters){
		// Check the group exists
		if(!OC_Group::groupExists($parameters['groupid'])){
			return new OC_OCS_Result(null, \OCP\API::RESPOND_NOT_FOUND, 'The requested group could not be found');
		}
		// Check subadmin has access to this group
		if(\OC_User::isAdminUser(\OC_User::getUser())
			|| in_array($parameters['groupid'], \OC_SubAdmin::getSubAdminsGroups(\OC_User::getUser()))){
			return new OC_OCS_Result(array('users' => OC_Group::usersInGroup($parameters['groupid'])));
		} else {
			return new OC_OCS_Result(null, \OCP\API::RESPOND_UNAUTHORISED, 'User does not have access to specified group');
		}
	}

	/**
	 * creates a new group
	 */
	public static function addGroup($parameters){
		// Validate name
		$groupid = isset($_POST['groupid']) ? $_POST['groupid'] : '';
		if( preg_match( '/[^a-zA-Z0-9 _\.@\-]/', $groupid ) || empty($groupid)){
			\OCP\Util::writeLog('provisioning_api', 'Attempt made to create group using invalid characters.', \OCP\Util::ERROR);
			return new OC_OCS_Result(null, 101, 'Invalid group name');
		}
		// Check if it exists
		if(OC_Group::groupExists($groupid)){
			return new OC_OCS_Result(null, 102);
		}
		if(OC_Group::createGroup($groupid)){
			return new OC_OCS_Result(null, 100);
		} else {
			return new OC_OCS_Result(null, 103);
		}
	}

	public static function deleteGroup($parameters){
		// Check it exists
		if(!OC_Group::groupExists($parameters['groupid'])){
			return new OC_OCS_Result(null, 101);
		} else if($parameters['groupid'] == 'admin' || !OC_Group::deleteGroup($parameters['groupid'])){
			// Cannot delete admin group
			return new OC_OCS_Result(null, 102);
		} else {
			return new OC_OCS_Result(null, 100);
		}
	}

	public static function getSubAdminsOfGroup($parameters) {
		$group = $parameters['groupid'];
		// Check group exists
		if(!OC_Group::groupExists($group)) {
			return new OC_OCS_Result(null, 101, 'Group does not exist');
		}
		// Go
		if(!$subadmins = OC_Subadmin::getGroupsSubAdmins($group)) {
			return new OC_OCS_Result(null, 102, 'Unknown error occured');
		} else {
			return new OC_OCS_Result($subadmins);
		}
	}

}