Access right mixin

Closes #588 (closed)

arkindex/project/mixins.py

@@ -32,8 +32,15 @@ class ACLMixin(object):
         """
         Return a model queryset matching a given access level for this user
         """
+        # Handle specific cases (i.e. admin or anonymous user)
         if self.user.is_admin or self.user.is_internal:
             return model.objects.all()
+        elif user.is_anonymous:
+            if level > Role.Guest.value or not public:
+                return model.objects.none()
+            else:
+                return model.objects.filter(public=True)
+
         queryset = model.objects \
             .filter(
                 # Filter instances with direct and groups rights for this user (They may be duplicated)