Implement voting logic: separation of concerns

A separate AccompanyingCourseDocumentStoredObjectVoter was\
created to handle the specific access to a Stored object\
related to an Accompanying Course Document.

src/Bundle/ChillDocStoreBundle/Repository/AccompanyingCourseDocumentRepository.php

@@ -12,6 +12,7 @@ declare(strict_types=1);
 namespace Chill\DocStoreBundle\Repository;
 
 use Chill\DocStoreBundle\Entity\AccompanyingCourseDocument;
+use Chill\DocStoreBundle\Entity\StoredObject;
 use Chill\PersonBundle\Entity\AccompanyingPeriod;
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\EntityRepository;
@@ -45,6 +46,17 @@ class AccompanyingCourseDocumentRepository implements ObjectRepository
         return $qb->getQuery()->getSingleScalarResult();
     }
 
+    public function findLinkedCourseDocument(int $storedObjectId): ?AccompanyingCourseDocument {
+
+        $qb = $this->repository->createQueryBuilder('d');
+        $query = $qb->leftJoin('d.storedObject', 'do')
+                ->where('do.id = :storedObjectId')
+                ->setParameter('storedObjectId', $storedObjectId)
+                ->getQuery();
+
+        return $query->getResult();
+    }
+
     public function find($id): ?AccompanyingCourseDocument
     {
         return $this->repository->find($id);
@@ -69,4 +81,5 @@ class AccompanyingCourseDocumentRepository implements ObjectRepository
     {
         return AccompanyingCourseDocument::class;
     }
+
 }