1 files changed, 41 insertions, 7 deletions
diff --git a/lib/plugins/config/settings/extra.class.php b/lib/plugins/config/settings/extra.class.php
index b4e35b1cc..e4b97eb01 100644
--- a/lib/plugins/config/settings/extra.class.php
+++ b/lib/plugins/config/settings/extra.class.php
@@ -43,16 +43,50 @@ if (!class_exists('setting_authtype')) {
   class setting_authtype extends setting_multichoice {
 
     function initialize($default,$local,$protected) {
+        global $plugin_controller;
 
-      // populate $this->_choices with a list of available auth mechanisms
-      $authtypes = glob(DOKU_INC.'inc/auth/*.class.php');
-      $authtypes = preg_replace('#^.*/([^/]*)\.class\.php$#i','$1', $authtypes);
-      $authtypes = array_diff($authtypes, array('basic'));
-      sort($authtypes);
+        // retrieve auth types provided by plugins
+        foreach ($plugin_controller->getList('auth') as $plugin) {
+            $this->_choices[] = $plugin;
+        }
 
-      $this->_choices = $authtypes;
+        parent::initialize($default,$local,$protected);
+    }
 
-      parent::initialize($default,$local,$protected);
+    function update($input) {
+        global $plugin_controller;
+
+        // is an update possible/requested?
+        $local = $this->_local;                       // save this, parent::update() may change it
+        if (!parent::update($input)) return false;    // nothing changed or an error caught by parent
+        $this->_local = $local;                       // restore original, more error checking to come
+
+        // attempt to load the plugin
+        $auth_plugin = $plugin_controller->load('auth', $input);
+
+        // @TODO: throw an error in plugin controller instead of returning null
+        if (is_null($auth_plugin)) {
+            $this->_error = true;
+            msg('Cannot load Auth Plugin "' . $input . '"', -1);
+            return false;
+        }
+
+        // verify proper instantiation (is this really a plugin?) @TODO use instanceof? implement interface?
+        if (is_object($auth_plugin) && !method_exists($auth_plugin, 'getPluginName')) {
+            $this->_error = true;
+            msg('Cannot create Auth Plugin "' . $input . '"', -1);
+            return false;
+        }
+
+        // did we change the auth type? logout
+        global $conf;
+        if($conf['authtype'] != $input) {
+            msg('Authentication system changed. Please re-login.');
+            auth_logoff();
+        }
+
+        $this->_local = $input;
+        return true;
     }
   }
 }