/**
  * @see PKPPlugin::manage()
  */
 function manage($verb, $args, &$message, &$messageParams)
 {
     $returner = parent::manage($verb, $args, $message, $messageParams);
     if (!$returner) {
         return false;
     }
     $this->import('UsageStatsSettingsForm');
     switch ($verb) {
         case 'settings':
             $templateMgr =& TemplateManager::getManager();
             $templateMgr->register_function('plugin_url', array(&$this, 'smartyPluginUrl'));
             $settingsForm = new UsageStatsSettingsForm($this);
             $settingsForm->initData();
             $settingsForm->display();
             break;
         case 'save':
             $settingsForm = new UsageStatsSettingsForm($this);
             $settingsForm->readInputData();
             if ($settingsForm->validate()) {
                 $settingsForm->execute();
                 $message = NOTIFICATION_TYPE_SUCCESS;
                 $messageParams = array('contents' => __('plugins.generic.usageStats.settings.saved'));
                 return false;
             } else {
                 $settingsForm->display();
             }
             break;
         default:
             return $returner;
     }
     return true;
 }