/**
  * Check if we have the 'Unknown' consent, and present a warning. The project default consent is
  * normally 'Unknown' but this can be overruled in project.ini so checking for default is not right
  *
  * @static boolean $warned We need only one warning in case of multiple consents
  * @param string $consent
  */
 public function checkConsent($consent)
 {
     static $warned;
     if ($warned) {
         return $consent;
     }
     $unknown = $this->util->getConsentUnknown();
     // Value is translated by now if in bridge
     if ($consent == $unknown || $consent == $this->_($unknown)) {
         $warned = true;
         $msg = $this->_('Please settle the informed consent form for this respondent.');
         if ($this->view instanceof \Zend_View) {
             $url[$this->request->getControllerKey()] = 'respondent';
             $url[$this->request->getActionKey()] = 'edit';
             $url[\MUtil_Model::REQUEST_ID1] = $this->request->getParam(\MUtil_Model::REQUEST_ID1);
             $url[\MUtil_Model::REQUEST_ID2] = $this->request->getParam(\MUtil_Model::REQUEST_ID2);
             $urlString = $this->view->url($url) . '#tabContainer-frag-4';
             $this->addMessage(\MUtil_Html::create()->a($urlString, $msg));
         } else {
             $this->addMessage($msg);
         }
     }
     return $consent;
 }