/**
  * Action permettant de récupérer l'arbre des jeux de données.
  *
  * @param sfWebRequest $request
  */
 public function execute($request)
 {
     $this->getResponse()->setContentType('application/json');
     $this->setLayout(false);
     $jddId = $request->getParameter("jdd_id");
     $profileRef = $request->getParameter("profile_ref");
     $profileId = $request->getParameter("profile_id");
     $projectRef = $request->getParameter("project_ref");
     $projectId = $request->getParameter("project_id");
     $deviceId = $request->getParameter("device_id");
     $driverId = $request->getParameter("driver_id");
     $browserId = $request->getParameter("browser_id");
     $date = $request->getParameter("date");
     $expectedDate = str_replace("*", " ", $date);
     $expectedDate = str_replace("_", ":", $expectedDate);
     $response = array("error" => "An error occured when we try to add scenario into execution stack.");
     try {
         $this->getUser()->signIn($this->user, true);
         $execution = new EiExecutionStack();
         $execution->setEiScenario($this->scenario);
         $execution->setSfGuardUser($this->user);
         $execution->setProfileRef($profileRef);
         $execution->setProfileId($profileId);
         $execution->setProjectRef($projectRef);
         $execution->setProjectId($projectId);
         if ($jddId != null && $jddId != 0) {
             $execution->setEiDataSetId($jddId);
         }
         if ($deviceId != null && $deviceId != 'null') {
             $execution->setDeviceId($deviceId);
         }
         $execution->setDriverId($driverId);
         $execution->setBrowserId($browserId);
         $execution->setExpectedDate($expectedDate);
         $execution->save();
         unset($response["error"]);
         $response["success"] = true;
         $response["id"] = $execution->getId();
     } catch (Exception $e) {
         $response = array();
     }
     return $this->renderText(json_encode($response));
 }