330 lines
8.1 KiB
PHP
330 lines
8.1 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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* @copyright Copyright (c) 2018, Georg Ehrke
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*
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Georg Ehrke <oc.list@georgehrke.com>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\DAV\DAV;
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use OCP\IGroup;
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use OCP\IGroupManager;
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use OCP\IUser;
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use OCP\IUserSession;
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use OCP\Share\IManager as IShareManager;
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use Sabre\DAV\Exception;
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use Sabre\DAV\PropPatch;
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use Sabre\DAVACL\PrincipalBackend\BackendInterface;
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class GroupPrincipalBackend implements BackendInterface {
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const PRINCIPAL_PREFIX = 'principals/groups';
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/** @var IGroupManager */
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private $groupManager;
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/** @var IUserSession */
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private $userSession;
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/** @var IShareManager */
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private $shareManager;
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/**
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* @param IGroupManager $IGroupManager
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* @param IUserSession $userSession
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* @param IShareManager $shareManager
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*/
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public function __construct(IGroupManager $IGroupManager,
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IUserSession $userSession,
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IShareManager $shareManager) {
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$this->groupManager = $IGroupManager;
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$this->userSession = $userSession;
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$this->shareManager = $shareManager;
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}
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/**
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* Returns a list of principals based on a prefix.
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*
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* This prefix will often contain something like 'principals'. You are only
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* expected to return principals that are in this base path.
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*
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* You are expected to return at least a 'uri' for every user, you can
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* return any additional properties if you wish so. Common properties are:
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* {DAV:}displayname
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*
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* @param string $prefixPath
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* @return string[]
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*/
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public function getPrincipalsByPrefix($prefixPath) {
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$principals = [];
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if ($prefixPath === self::PRINCIPAL_PREFIX) {
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foreach($this->groupManager->search('') as $user) {
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$principals[] = $this->groupToPrincipal($user);
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}
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}
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return $principals;
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}
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/**
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* Returns a specific principal, specified by it's path.
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* The returned structure should be the exact same as from
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* getPrincipalsByPrefix.
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*
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* @param string $path
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* @return array
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*/
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public function getPrincipalByPath($path) {
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$elements = explode('/', $path, 3);
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if ($elements[0] !== 'principals') {
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return null;
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}
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if ($elements[1] !== 'groups') {
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return null;
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}
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$name = urldecode($elements[2]);
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$group = $this->groupManager->get($name);
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if (!is_null($group)) {
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return $this->groupToPrincipal($group);
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}
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return null;
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}
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/**
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* Returns the list of members for a group-principal
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*
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* @param string $principal
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* @return string[]
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* @throws Exception
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*/
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public function getGroupMemberSet($principal) {
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$elements = explode('/', $principal);
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if ($elements[0] !== 'principals') {
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return [];
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}
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if ($elements[1] !== 'groups') {
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return [];
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}
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$name = $elements[2];
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$group = $this->groupManager->get($name);
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if (is_null($group)) {
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return [];
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}
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return array_map(function($user) {
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return $this->userToPrincipal($user);
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}, $group->getUsers());
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}
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/**
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* Returns the list of groups a principal is a member of
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*
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* @param string $principal
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* @return array
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* @throws Exception
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*/
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public function getGroupMembership($principal) {
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return [];
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}
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/**
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* Updates the list of group members for a group principal.
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*
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* The principals should be passed as a list of uri's.
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*
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* @param string $principal
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* @param string[] $members
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* @throws Exception
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*/
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public function setGroupMemberSet($principal, array $members) {
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throw new Exception('Setting members of the group is not supported yet');
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}
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/**
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* @param string $path
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* @param PropPatch $propPatch
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* @return int
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*/
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function updatePrincipal($path, PropPatch $propPatch) {
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return 0;
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}
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/**
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* @param string $prefixPath
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* @param array $searchProperties
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* @param string $test
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* @return array
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*/
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function searchPrincipals($prefixPath, array $searchProperties, $test = 'allof') {
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$results = [];
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if (\count($searchProperties) === 0) {
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return [];
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}
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if ($prefixPath !== self::PRINCIPAL_PREFIX) {
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return [];
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}
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// If sharing is disabled, return the empty array
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$shareAPIEnabled = $this->shareManager->shareApiEnabled();
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if (!$shareAPIEnabled) {
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return [];
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}
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// If sharing is restricted to group members only,
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// return only members that have groups in common
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$restrictGroups = false;
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if ($this->shareManager->shareWithGroupMembersOnly()) {
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$user = $this->userSession->getUser();
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if (!$user) {
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return [];
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}
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$restrictGroups = $this->groupManager->getUserGroupIds($user);
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}
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foreach ($searchProperties as $prop => $value) {
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switch ($prop) {
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case '{DAV:}displayname':
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$groups = $this->groupManager->search($value);
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$results[] = array_reduce($groups, function(array $carry, IGroup $group) use ($restrictGroups) {
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$gid = $group->getGID();
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// is sharing restricted to groups only?
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if ($restrictGroups !== false) {
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if (!\in_array($gid, $restrictGroups, true)) {
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return $carry;
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}
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}
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$carry[] = self::PRINCIPAL_PREFIX . '/' . $gid;
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return $carry;
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}, []);
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break;
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case '{urn:ietf:params:xml:ns:caldav}calendar-user-address-set':
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// If you add support for more search properties that qualify as a user-address,
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// please also add them to the array below
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$results[] = $this->searchPrincipals(self::PRINCIPAL_PREFIX, [
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], 'anyof');
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break;
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default:
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$results[] = [];
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break;
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}
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}
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// results is an array of arrays, so this is not the first search result
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// but the results of the first searchProperty
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if (count($results) === 1) {
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return $results[0];
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}
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switch ($test) {
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case 'anyof':
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return array_values(array_unique(array_merge(...$results)));
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case 'allof':
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default:
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return array_values(array_intersect(...$results));
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}
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}
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/**
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* @param string $uri
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* @param string $principalPrefix
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* @return string
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*/
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function findByUri($uri, $principalPrefix) {
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// If sharing is disabled, return the empty array
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$shareAPIEnabled = $this->shareManager->shareApiEnabled();
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if (!$shareAPIEnabled) {
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return null;
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}
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// If sharing is restricted to group members only,
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// return only members that have groups in common
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$restrictGroups = false;
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if ($this->shareManager->shareWithGroupMembersOnly()) {
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$user = $this->userSession->getUser();
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if (!$user) {
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return null;
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}
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$restrictGroups = $this->groupManager->getUserGroupIds($user);
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}
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if (strpos($uri, 'principal:principals/groups/') === 0) {
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$name = urlencode(substr($uri, 28));
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if ($restrictGroups !== false && !\in_array($name, $restrictGroups, true)) {
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return null;
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}
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return substr($uri, 10);
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}
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return null;
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}
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/**
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* @param IGroup $group
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* @return array
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*/
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protected function groupToPrincipal($group) {
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$groupId = $group->getGID();
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// getDisplayName returns UID if none
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$displayName = $group->getDisplayName();
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return [
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'uri' => 'principals/groups/' . urlencode($groupId),
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'{DAV:}displayname' => $displayName,
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'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'GROUP',
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];
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}
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/**
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* @param IUser $user
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* @return array
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*/
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protected function userToPrincipal($user) {
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$userId = $user->getUID();
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// getDisplayName returns UID if none
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$displayName = $user->getDisplayName();
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$principal = [
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'uri' => 'principals/users/' . $userId,
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'{DAV:}displayname' => $displayName,
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'{urn:ietf:params:xml:ns:caldav}calendar-user-type' => 'INDIVIDUAL',
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];
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$email = $user->getEMailAddress();
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if (!empty($email)) {
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$principal['{http://sabredav.org/ns}email-address'] = $email;
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}
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return $principal;
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}
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}
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