adding remove participation method

Controller/ParticipationController.php

@@ -19,6 +19,8 @@
 
 namespace Chill\EventBundle\Controller;
 
+use Chill\EventBundle\Entity\Event;
+use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;
 use Symfony\Bundle\FrameworkBundle\Controller\Controller;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -551,8 +553,9 @@ class ParticipationController extends Controller
     
     /**
      * show a form to edit multiple participation for the same event.
-     * 
+     *
      * @param int $event_id
+     * @return \Symfony\Component\HttpFoundation\RedirectResponse|Response
      */
     public function editMultipleAction($event_id)
     {
@@ -637,8 +640,8 @@ class ParticipationController extends Controller
     }
     
     /**
-     * 
-     * @param \Doctrine\Common\Collections\Collectionn $participations contains object of Participation type
+     *
+     * @param \Doctrine\Common\Collections\Collection $participations contains object of Participation type
      * @param \Chill\EventBundle\Entity\Event $event
      * @return \Symfony\Component\Form\FormInterface
      */
@@ -669,4 +672,65 @@ class ParticipationController extends Controller
         return $form;
     }
     
+    /**
+     * @param integer $participation_id
+     * @param Request $request
+     * @return \Symfony\Component\HttpFoundation\RedirectResponse|Response
+     */
+    public function deleteAction($participation_id, Request $request)
+    {
+        $em = $this->getDoctrine()->getManager();
+        $participation = $em->getRepository('ChillEventBundle:Participation')->findOneBy([
+            'id' => $participation_id
+        ]);
+        
+        if  (! $participation) {
+            throw $this->createNotFoundException('Unable to find participation.');
+        }
+        
+        /** @var Event $event */
+        $event = $participation->getEvent();
+        
+        $form = $this->createDeleteForm($participation_id);
+        
+        if ($request->getMethod() === Request::METHOD_DELETE) {
+            $form->handleRequest($request);
+            
+            if ($form->isValid()) {
+                
+                $em->remove($participation);
+                $em->flush();
+                
+                $this->addFlash('success', $this->get('translator')
+                    ->trans("The participation has been sucessfully removed")
+                );
+                
+                return $this->redirectToRoute('chill_event__event_show', [
+                    'event_id' => $event->getId()
+                ]);
+            }
+        }
+        return $this->render('ChillEventBundle:Event:confirm_delete.html.twig', [
+            'event_id' => $event->getId(),
+            'delete_form' => $form->createView()
+        ]);
+        
+    }
+    
+    /**
+     * @param $participation_id
+     * @return \Symfony\Component\Form\FormInterface
+     */
+    private function createDeleteForm($participation_id)
+    {
+        return $this->createFormBuilder()
+            ->setAction($this->generateUrl('chill_event_participation_delete', [
+                'participation_id' => $participation_id
+            ]))
+            ->setMethod('DELETE')
+            ->add('submit', SubmitType::class, ['label' => 'Delete'])
+            ->getForm()
+            ;
+    }
+    
 }