public function getQuestionnaireStarted(UserInterface $user)
    {
        $userSessions = $this->manager->getRepository('QcmPublicBundle:UserSession')->findBy(array(
            'user' => $user
        ));

        foreach ($userSessions as $userSession) {
            $configuration = $userSession->getConfiguration();
            if (!is_null($configuration->getStartAt()) && is_null($configuration->getEndAt())) {
                $this->startQuestionnaire($userSession);
                $this->getLastAnsweredQuestion();
                break;
            }
        }
    }