add LDAP User and Group proxies to suppoer multiple servers

1 files changed, 104 insertions, 0 deletions

diff --git a/apps/user_ldap/lib/proxy.php b/apps/user_ldap/lib/proxy.php
new file mode 100644
index 00000000000..c80e2163475
--- /dev/null
+++ b/apps/user_ldap/lib/proxy.php
@@ -0,0 +1,104 @@
+<?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;
+
+abstract class Proxy {
+	static private $connectors = array();
+
+	public function __construct() {
+		$this->cache = \OC_Cache::getGlobalCache();
+	}
+
+	private function addConnector($configPrefix) {
+		self::$connectors[$configPrefix] = new \OCA\user_ldap\lib\Connection($configPrefix);
+	}
+
+	protected function getConnector($configPrefix) {
+		if(!isset(self::$connectors[$configPrefix])) {
+			$this->addConnector($configPrefix);
+		}
+		return self::$connectors[$configPrefix];
+	}
+
+	protected function getConnectors() {
+		return self::$connectors;
+	}
+
+	protected function getUserCacheKey($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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