check for a model in permission and use that in treasury

apps/permission/backends.py

@@ -198,6 +198,41 @@ class PermissionBackend(ModelBackend):
     def has_module_perms(self, user_obj, app_label):
         return False
 
+    @staticmethod
+    @memoize
+    def has_model_perm(request, model, type):
+        """
+        Check is the given user has the permission over a given model for a given action.
+        The result is then memoized.
+        :param request: The current request
+        :param model: The model that the permissions shoud apply
+        :param type: The type of the permissions: view, change, add or delete
+        For view action, it is consider possible if user can view or change the model
+        """
+        # Requested by a shell
+        if request is None:
+            return False
+
+        user_obj = request.user
+        sess = request.session
+
+        if hasattr(request, 'auth') and request.auth is not None and hasattr(request.auth, 'scope'):
+            # OAuth2 Authentication
+            user_obj = request.auth.user
+
+        if user_obj is None or user_obj.is_anonymous:
+            return False
+
+        if user_obj.is_superuser and sess.get("permission_mask", -1) >= 42:
+            return True
+
+        ct = ContentType.objects.get_for_model(model)
+        if any(PermissionBackend.permissions(request, ct, type)):
+            return True
+        if type == "view" and any(PermissionBackend.permissions(request, ct, "change")):
+            return True
+        return False
+
     def get_all_permissions(self, user_obj, obj=None):
         ct = ContentType.objects.get_for_model(obj)
         return list(self.permissions(get_current_request(), ct, "view"))

apps/treasury/tests/test_treasury.py

@@ -385,8 +385,7 @@ class TestSogeCredits(TestCase):
 
         response = self.client.post(reverse("treasury:manage_soge_credit", args=(soge_credit.pk,)),
                                     data=dict(delete=True))
-        # 403 because no SogeCredit exists anymore, then a PermissionDenied is raised
-        self.assertRedirects(response, reverse("treasury:soge_credits"), 302, 403)
+        self.assertRedirects(response, reverse("treasury:soge_credits"), 302, 200)
         self.assertFalse(SogeCredit.objects.filter(pk=soge_credit.pk))
         self.user.note.refresh_from_db()
         self.assertEqual(self.user.note.balance, 0)

apps/treasury/views.py

@@ -101,14 +101,7 @@ class InvoiceListView(LoginRequiredMixin, SingleTableView):
         if not request.user.is_authenticated:
             return self.handle_no_permission()
 
-        sample_invoice = Invoice(
-            id=0,
-            object="",
-            description="",
-            name="",
-            address="",
-        )
-        if not PermissionBackend.check_perm(self.request, "treasury.view_invoice", sample_invoice):
+        if not PermissionBackend.has_model_perm(self.request, Invoice(), "view"):
             raise PermissionDenied(_("You are not able to see the treasury interface."))
         return super().dispatch(request, *args, **kwargs)
 
@@ -278,11 +271,7 @@ class RemittanceListView(LoginRequiredMixin, TemplateView):
         if not request.user.is_authenticated:
             return self.handle_no_permission()
 
-        sample_remittance = Remittance(
-            remittance_type_id=1,
-            comment="",
-        )
-        if not PermissionBackend.check_perm(self.request, "treasury.add_remittance", sample_remittance):
+        if not PermissionBackend.has_model_perm(self.request, Remittance(), "view"):
             raise PermissionDenied(_("You are not able to see the treasury interface."))
         return super().dispatch(request, *args, **kwargs)
 
@@ -408,7 +397,7 @@ class SogeCreditListView(LoginRequiredMixin, ProtectQuerysetMixin, SingleTableVi
         if not request.user.is_authenticated:
             return self.handle_no_permission()
 
-        if not super().get_queryset().exists():
+        if not PermissionBackend.has_model_perm(self.request, SogeCredit(), "view"):
             raise PermissionDenied(_("You are not able to see the treasury interface."))
         return super().dispatch(request, *args, **kwargs)