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<?php
/**
* @author Arthur Schiwon <blizzz@owncloud.com>
* @author Christopher Schäpers <kondou@ts.unde.re>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin McCorkell <robin@mccorkell.me.uk>
*
* @copyright Copyright (c) 2016, 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\user_ldap;
use OCA\user_ldap\lib\ILDAPWrapper;
class Group_Proxy extends lib\Proxy implements \OCP\GroupInterface {
private $backends = array();
private $refBackend = null;
/**
* Constructor
* @param string[] $serverConfigPrefixes array containing the config Prefixes
*/
public function __construct($serverConfigPrefixes, ILDAPWrapper $ldap) {
parent::__construct($ldap);
foreach($serverConfigPrefixes as $configPrefix) {
$this->backends[$configPrefix] =
new \OCA\user_ldap\GROUP_LDAP($this->getAccess($configPrefix));
if(is_null($this->refBackend)) {
$this->refBackend = &$this->backends[$configPrefix];
}
}
}
/**
* Tries the backends one after the other until a positive result is returned from the specified method
* @param string $gid the gid connected to the request
* @param string $method the method of the group backend that shall be called
* @param array $parameters an array of parameters to be passed
* @return mixed, the result of the method or false
*/
protected function walkBackends($gid, $method, $parameters) {
$cacheKey = $this->getGroupCacheKey($gid);
foreach($this->backends as $configPrefix => $backend) {
if($result = call_user_func_array(array($backend, $method), $parameters)) {
$this->writeToCache($cacheKey, $configPrefix);
return $result;
}
}
return false;
}
/**
* Asks the backend connected to the server that supposely takes care of the gid from the request.
* @param string $gid the gid connected to the request
* @param string $method the method of the group backend that shall be called
* @param array $parameters an array of parameters to be passed
* @param mixed $passOnWhen the result matches this variable
* @return mixed, the result of the method or false
*/
protected function callOnLastSeenOn($gid, $method, $parameters, $passOnWhen) {
$cacheKey = $this->getGroupCacheKey($gid);;
$prefix = $this->getFromCache($cacheKey);
//in case the uid has been found in the past, try this stored connection first
if(!is_null($prefix)) {
if(isset($this->backends[$prefix])) {
$result = call_user_func_array(array($this->backends[$prefix], $method), $parameters);
if($result === $passOnWhen) {
//not found here, reset cache to null if group vanished
//because sometimes methods return false with a reason
$groupExists = call_user_func_array(
array($this->backends[$prefix], 'groupExists'),
array($gid)
);
if(!$groupExists) {
$this->writeToCache($cacheKey, null);
}
}
return $result;
}
}
return false;
}
/**
* is user in group?
* @param string $uid uid of the user
* @param string $gid gid of the group
* @return bool
*
* Checks whether the user is member of a group or not.
*/
public function inGroup($uid, $gid) {
return $this->handleRequest($gid, 'inGroup', array($uid, $gid));
}
/**
* Get all groups a user belongs to
* @param string $uid Name of the user
* @return string[] with group names
*
* This function fetches all groups a user belongs to. It does not check
* if the user exists at all.
*/
public function getUserGroups($uid) {
$groups = array();
foreach($this->backends as $backend) {
$backendGroups = $backend->getUserGroups($uid);
if (is_array($backendGroups)) {
$groups = array_merge($groups, $backendGroups);
}
}
return $groups;
}
/**
* get a list of all users in a group
* @return string[] with user ids
*/
public function usersInGroup($gid, $search = '', $limit = -1, $offset = 0) {
$users = array();
foreach($this->backends as $backend) {
$backendUsers = $backend->usersInGroup($gid, $search, $limit, $offset);
if (is_array($backendUsers)) {
$users = array_merge($users, $backendUsers);
}
}
return $users;
}
/**
* returns the number of users in a group, who match the search term
* @param string $gid the internal group name
* @param string $search optional, a search string
* @return int|bool
*/
public function countUsersInGroup($gid, $search = '') {
return $this->handleRequest(
$gid, 'countUsersInGroup', array($gid, $search));
}
/**
* get a list of all groups
* @return string[] with group names
*
* Returns a list with all groups
*/
public function getGroups($search = '', $limit = -1, $offset = 0) {
$groups = array();
foreach($this->backends as $backend) {
$backendGroups = $backend->getGroups($search, $limit, $offset);
if (is_array($backendGroups)) {
$groups = array_merge($groups, $backendGroups);
}
}
return $groups;
}
/**
* check if a group exists
* @param string $gid
* @return bool
*/
public function groupExists($gid) {
return $this->handleRequest($gid, 'groupExists', array($gid));
}
/**
* Check if backend implements actions
* @param int $actions bitwise-or'ed actions
* @return boolean
*
* Returns the supported actions as int to be
* compared with OC_USER_BACKEND_CREATE_USER etc.
*/
public function implementsActions($actions) {
//it's the same across all our user backends obviously
return $this->refBackend->implementsActions($actions);
}
}
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