add a first step to pick center in new event form

Controller/EventController.php

@@ -16,6 +16,10 @@ use Symfony\Component\Security\Core\Role\Role;
 use Symfony\Component\Form\Extension\Core\Type\FormType;
 use Symfony\Component\Form\Extension\Core\Type\SubmitType;
 use Symfony\Component\Form\Extension\Core\Type\HiddenType;
+use Chill\EventBundle\Form\Type\PickCenterType;
+use Chill\MainBundle\Entity\Center;
+use Symfony\Bridge\Doctrine\Form\Type\EntityType;
+use Symfony\Component\Form\FormFactoryInterface;
 
 
 /**
@@ -34,15 +38,25 @@ class EventController extends Controller
      */
     protected $authorizationHelper;
     
+    /**
+     * @var FormFactoryInterface
+     */
+    protected $formFactoryInterface;
+
     /**
      * EventController constructor.
      *
      * @param EventDispatcherInterface $eventDispatcher
      */
-    public function __construct(EventDispatcherInterface $eventDispatcher, AuthorizationHelper $authorizationHelper)
+    public function __construct(
+        EventDispatcherInterface $eventDispatcher,
+        AuthorizationHelper $authorizationHelper,
+        FormFactoryInterface $formFactoryInterface
+    )
     {
         $this->eventDispatcher = $eventDispatcher;
         $this->authorizationHelper = $authorizationHelper;
+        $this->formFactoryInterface = $formFactoryInterface;
     }
     
     
@@ -98,14 +112,63 @@ class EventController extends Controller
 
         return $form;
     }
+    
+    /**
+     * First step of new Event form
+     */
+    public function newPickCenterAction()
+    {
+        $role = new Role('CHILL_EVENT_CREATE');
 
+        /** @var Center $centers  */
+        $centers = $this->authorizationHelper->getReachableCenters($this->getUser(), $role);
+        
+        $form = $this->formFactoryInterface
+            ->createNamedBuilder(null)
+            ->setMethod('GET')
+            ->setAction(
+                $this->generateUrl('chill_event__event_new'))
+            ->add('center_id', EntityType::class, array(
+                'class' => Center::class,
+                'choices' => $centers,
+                'placeholder' => '',
+                'label' => 'To which centre should the event be associated ?'
+            ))
+            ->add('submit', SubmitType::class, array(
+                'label' => 'Next step'
+            ))
+            ->getForm();
+        
+        if (count($centers) === 1)
+        {
+            return $this->redirectToRoute('chill_event__event_new', array(
+                'center_id' => $centers[0]->getId()
+            ));
+        }
+
+        return $this->render('ChillEventBundle:Event:newPickCenter.html.twig', array(
+            'form' => $form->createView()
+        ));
+
+    }
+    
     /**
      * Displays a form to create a new Event entity.
-     *
+     * @param Center $center
+     * @param Request $request
+     * @return \Symfony\Component\HttpFoundation\Response
      */
-    public function newAction()
+    public function newAction(Center $center = null, Request $request)
     {
+        if ($center === null)
+        {
+            $center_id = $request->query->get('center_id');
+            $center = $this->getDoctrine()->getRepository(Center::class)->find($center_id);
+        }
+        
         $entity = new Event();
+        $entity->setCenter($center);
+        
         $form   = $this->createCreateForm($entity);
 
         return $this->render('ChillEventBundle:Event:new.html.twig', array(