diff --git a/src/Libs/Libs.php b/src/Libs/Libs.php
index 3494af5..032095b 100644
--- a/src/Libs/Libs.php
+++ b/src/Libs/Libs.php
@@ -3,8 +3,11 @@
 namespace App\Libs;
 
 use App\Entity\Location;
+use App\Entity\MemberCase;
 use App\Entity\Messages;
+use App\Entity\Supervision;
 use App\Entity\User;
+use App\Entity\UserCase;
 use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\Response;
@@ -108,4 +111,41 @@ class Libs extends AbstractController
 
         return $msgs;
     }
+
+    /**
+     * Checks if the user has permission to access a case.
+     *
+     * @param User $user 
+     * @param MemberCase $case 
+     * @param EntityManagerInterface $em 
+     * 
+     * @return bool
+     */
+    public static function checkPermissions(User $user, MemberCase $case, EntityManagerInterface $em): bool
+    {
+        // if user is an admin, allow the action
+        if (in_array('ROLE_ADMIN', $user->getRoles())) {
+            return true;
+        }
+
+        // if user is assigned to this case, allow the action
+        $uc = $em->getRepository(UserCase::class)->findOneBy(['user' => $user, 'memberCase' => $case]);
+        if ($uc) {
+            return true;
+        }
+
+        // get user of the case and check if user is a supervisor of the worker
+        /** @var ?UserCase $uc */
+        $uc = $em->getRepository(UserCase::class)->findOneBy(['memberCase' => $case]);
+        if ($uc) {
+            $sup = $em->getRepository(Supervision::class)->findOneBy(['supervisor' => $user, 'worker' => $uc->getUser()]);    
+
+            if ($sup) {
+                return true;
+            }
+        }
+
+        // user does not have permissions to the case
+        return false;
+    }
 }