add a form to make a ling with 'add a participant' page

Controller/EventController.php

@@ -4,9 +4,13 @@ namespace Chill\EventBundle\Controller;
 
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Bundle\FrameworkBundle\Controller\Controller;
-
+use Chill\PersonBundle\Form\Type\PickPersonType;
 use Chill\EventBundle\Entity\Event;
 use Chill\EventBundle\Form\EventType;
+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;
 
 /**
  * Event controller.
@@ -103,11 +107,52 @@ class EventController extends Controller
 
         $this->denyAccessUnlessGranted('CHILL_EVENT_SEE_DETAILS', $entity, 
               "You are not allowed to see details on this event");
+        
+        $addParticipationByPersonForm = $this->createAddParticipationByPersonForm($entity);
 
         return $this->render('ChillEventBundle:Event:show.html.twig', array(
-            'event'      => $entity
+            'event'      => $entity,
+            'form_add_participation_by_person' => $addParticipationByPersonForm->createView()
         ));
     }
+    
+    /**
+     * create a form to add a participation with a person
+     * 
+     * @return \Symfony\Component\Form\FormInterface
+     */
+    protected function createAddParticipationByPersonForm(Event $event)
+    {
+        /* @var $builder \Symfony\Component\Form\FormBuilderInterface */
+        $builder = $this
+                ->get('form.factory')
+                ->createNamedBuilder( 
+                    null,
+                    FormType::class, 
+                    null,
+                    array(
+                        'method' => 'GET',
+                        'action' => $this->generateUrl('chill_event_participation_new'),
+                        'csrf_protection' => false
+                    ))
+                ;
+        
+        $builder->add('person_id', PickPersonType::class, array(
+            'role' => new Role('CHILL_EVENT_CREATE'),
+            'centers' => $event->getCenter()
+        ));
+        
+        $builder->add('center_id', HiddenType::class, array(
+            'data' => $event->getCenter()->getId()
+        ));
+        
+        $builder->add('submit', SubmitType::class,
+                array(
+                    'label' => 'Add a participation'
+                ));
+        
+        return $builder->getForm();
+    }
 
     /**
      * Displays a form to edit an existing Event entity.