splitting function in order to prepare single/multiple adding association

ref #6

Controller/ParticipationController.php

@@ -21,6 +21,7 @@ namespace Chill\EventBundle\Controller;
 
 use Symfony\Bundle\FrameworkBundle\Controller\Controller;
 use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
 use Chill\EventBundle\Entity\Participation;
 use Chill\EventBundle\Form\ParticipationType;
 use Symfony\Component\Form\Extension\Core\Type\SubmitType;
@@ -33,7 +34,33 @@ use Chill\EventBundle\Security\Authorization\ParticipationVoter;
  */
 class ParticipationController extends Controller
 {
+    /**
+     * Show a form to add a participation
+     * 
+     * This function parse the person_id / persons_ids query argument
+     * and decide if it should process a single or multiple participation
+     * 
+     * @param Request $request
+     */
     public function newAction(Request $request)
+    {
+        $single = $request->query->getInt('person_id', null);
+        $multiple = $request->query->get('persons_ids', null);
+        
+        if ($single !== NULL AND $multiple !== NULL) {
+            // we are not allowed to have both person_id and persons_ids
+            return (new Response())
+                ->setStatusCode(Response::HTTP_BAD_REQUEST)
+                ->setContent("You are not allow to provide both 'person_id' and "
+                      . "'persons_ids' simulaneously");
+        }
+        
+        if ($single !== NULL) {
+            return $this->newSingleAction($request);
+        }
+    }
+    
+    protected function newSingleAction(Request $request)
     {
         $participation = $this->handleRequest($request, new Participation());