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