/**
  * Add a job to the user history.
  *
  * @param Job $job
  */
 protected function addJobToHistory(Job $job)
 {
     $session = $this->getRequest()->getSession();
     $ids = $session->get('job_history', array());
     if (!in_array($job->getId(), $ids)) {
         array_unshift($ids, $job->getId());
         $session->set('job_history', array_slice($ids, 0, 3));
     }
 }