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<?php
/**
* ownCloud – LDAP Backend Proxy
*
* @author Arthur Schiwon
* @copyright 2013 Arthur Schiwon blizzz@owncloud.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\user_ldap\lib;
use OCA\user_ldap\lib\Access;
abstract class Proxy {
static private $accesses = array();
private $ldap = null;
public function __construct(ILDAPWrapper $ldap) {
$this->ldap = $ldap;
$this->cache = \OC_Cache::getGlobalCache();
}
private function addAccess($configPrefix) {
$connector = new Connection($this->ldap, $configPrefix);
self::$accesses[$configPrefix] = new Access($connector, $this->ldap);
}
protected function getAccess($configPrefix) {
if(!isset(self::$accesses[$configPrefix])) {
$this->addAccess($configPrefix);
}
return self::$accesses[$configPrefix];
}
protected function getUserCacheKey($uid) {
return 'user-'.$uid.'-lastSeenOn';
}
protected function getGroupCacheKey($gid) {
return 'group-'.$gid.'-lastSeenOn';
}
abstract protected function callOnLastSeenOn($id, $method, $parameters);
abstract protected function walkBackends($id, $method, $parameters);
/**
* @brief Takes care of the request to the User backend
* @param $uid string, the uid connected to the request
* @param $method string, the method of the user backend that shall be called
* @param $parameters an array of parameters to be passed
* @return mixed, the result of the specified method
*/
protected function handleRequest($id, $method, $parameters) {
if(!$result = $this->callOnLastSeenOn($id, $method, $parameters)) {
$result = $this->walkBackends($id, $method, $parameters);
}
return $result;
}
private function getCacheKey($key) {
$prefix = 'LDAP-Proxy-';
if(is_null($key)) {
return $prefix;
}
return $prefix.md5($key);
}
public function getFromCache($key) {
if(!$this->isCached($key)) {
return null;
}
$key = $this->getCacheKey($key);
return unserialize(base64_decode($this->cache->get($key)));
}
public function isCached($key) {
$key = $this->getCacheKey($key);
return $this->cache->hasKey($key);
}
public function writeToCache($key, $value) {
$key = $this->getCacheKey($key);
$value = base64_encode(serialize($value));
$this->cache->set($key, $value, '2592000');
}
public function clearCache() {
$this->cache->clear($this->getCacheKey(null));
}
}
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