public function execute()
 {
     $tp = SJB_System::getTemplateProcessor();
     $action = null;
     if (SJB_UserManager::isUserLoggedIn()) {
         $userSID = SJB_UserManager::getCurrentUserSID();
         $contactSID = 0;
         $errors = array();
         if (isset($_REQUEST['passed_parameters_via_uri'])) {
             $passed_parameters_via_uri = SJB_UrlParamProvider::getParams();
             $contactSID = SJB_Array::get($passed_parameters_via_uri, 0);
         }
         if (!$contactSID) {
             $errors['UNDEFINED_CONTACT_ID'] = 1;
         } else {
             $contactInfo = SJB_PrivateMessage::getContactInfo($userSID, $contactSID);
             if (!$contactInfo) {
                 $errors['WRONG_CONTACT_ID_SPECIFIED'] = 1;
             } else {
                 $action = SJB_Request::getVar('action');
                 switch ($action) {
                     case 'save':
                         $note = SJB_Request::getVar('note');
                         $result = SJB_PrivateMessage::saveContactNote($userSID, $contactSID, $note);
                         if ($result) {
                             $tp->assign('noteSaved', true);
                         }
                         break;
                     default:
                         break;
                 }
             }
             $tp->assign('contactInfo', $contactInfo);
         }
         $tp->assign('errors', $errors);
     }
     if ($action) {
         $tp->assign('action', $action);
         $tp->display('notes.tpl');
     } else {
         $tp->display('contact.tpl');
     }
 }