From b94631de0cf16d0ffc83dd2e805efe275d119be6 Mon Sep 17 00:00:00 2001
From: Arthur Schiwon <blizzz@owncloud.com>
Date: Wed, 25 Jul 2012 18:40:48 +0200
Subject: [PATCH] LDAP: check if php-ldap is installed. If not, give an error
 output. FIX: blank Users page when the module is not installed.

---
 apps/user_ldap/lib/access.php     |  4 ++++
 apps/user_ldap/lib/connection.php | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/apps/user_ldap/lib/access.php b/apps/user_ldap/lib/access.php
index 870f6330ed..19122b34c7 100644
--- a/apps/user_ldap/lib/access.php
+++ b/apps/user_ldap/lib/access.php
@@ -48,6 +48,10 @@ abstract class Access {
 			return false;
 		}
 		$cr = $this->connection->getConnectionResource();
+		if(!is_resource($cr)) {
+			//LDAP not available
+			return false;
+		}
 		$rr = @ldap_read($cr, $dn, 'objectClass=*', array($attr));
 		if(!is_resource($rr)) {
 			\OCP\Util::writeLog('user_ldap', 'readAttribute failed for DN '.$dn, \OCP\Util::DEBUG);
diff --git a/apps/user_ldap/lib/connection.php b/apps/user_ldap/lib/connection.php
index c8ba9dad70..e54a8e2b24 100644
--- a/apps/user_ldap/lib/connection.php
+++ b/apps/user_ldap/lib/connection.php
@@ -211,11 +211,21 @@ class Connection {
 	 * Connects and Binds to LDAP
 	 */
 	private function establishConnection() {
+		static $phpLDAPinstalled = true;
+		if(!$phpLDAPinstalled) {
+			return false;
+		}
 		if(!$this->configured) {
 			\OCP\Util::writeLog('user_ldap', 'Configuration is invalid, cannot connect', \OCP\Util::WARN);
 			return false;
 		}
 		if(!$this->ldapConnectionRes) {
+			if(!function_exists('ldap_connect')) {
+				$phpLDAPinstalled = false;
+				\OCP\Util::writeLog('user_ldap', 'function ldap_connect is not available. Make sure that the PHP ldap module is installed.', \OCP\Util::ERROR);
+
+				return false;
+			}
 			$this->ldapConnectionRes = ldap_connect($this->config['ldapHost'], $this->config['ldapPort']);
 			if(ldap_set_option($this->ldapConnectionRes, LDAP_OPT_PROTOCOL_VERSION, 3)) {
 					if(ldap_set_option($this->ldapConnectionRes, LDAP_OPT_REFERRALS, 0)) {