controllerPLanning

<?php
namespace AppBundle\Controller;

use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use AppBundle\Entity\Book;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use AppBundle\Configuration;

class PlanController extends Controller
{
    /**
     * @Route("/plan", name="planning")
     */
    public function indexAction(Request $request)
    {
        $errorMsg = ""; // error message

        $req = new book();
        $req->setDate(new \DateTime());
//        $entity = new Element();

         /* form create */
        $form = $this->createFormBuilder($req)
            ->add('date', 'date')
            ->add('name', 'text', array('label' => 'Voornaam en achternaam '))
//            ->add('plan', 'text', array('label' => 'Plan'))
            ->add('participants', 'text', array('label' => 'Deelnemers'))
            ->add('timeStart', 'time', array('label' => 'begin tijd'))
            ->add('timeEnd', 'time', array('label' => 'eind tijd'))
            ->add('reason', 'text', array('label' => 'reden'))
            ->add('save', 'submit', array('label' => "Verzenden"))

            ->getForm();

        $form->handleRequest($request);

        /* post in database */
        if ($form->isValid()) {
            $em = $this->getDoctrine()->getManager();
            $bookEntity = $em->getRepository("AppBundle:book")->findBy(array("date" => $req->getDate()));
            $time_start = $em->getRepository("AppBundle:book")->findByName($form->get("timeStart") -> getViewData());
            $time_end = $em->getRepository("AppBundle:book")->findByName($form->get("timeEnd") -> getViewData());

            if (count($bookEntity) == 0) {
                if (count($time_start) == 0){
                    $em->persist($req);
                    $em->flush();
                    //return $this->redirectToRoute("homepage");
                }
            }elseif(count($bookEntity) == 1){
               // return new Response ('Er is al iets gepland');
                $errorMsg = "Er is al iets gepland";
            }
        }

//      $time_start = $em->getRepository("AppBundle:book")->findOneBy(array("time" => $req->getTimeStart()));
//      $time_end = $em->getRepository("AppBundle:book")->findOneBy(array("timeEnd" => $req->getTimeEnd()));

        /* informatie uit de database */

        $allBook = $this->getDoctrine()
            ->getRepository('AppBundle:Book')
            ->findAll();

        return $this->render('default/plan.html.twig',
            array(
                "form_book" => $form->createView(),
                "allBook" => $allBook,
                "errorMessage" => $errorMsg
            ));
    }

}