feat: add object tag view permissions [FC-0036]

openedx_learning/__init__.py

@@ -1,4 +1,4 @@
 """
 Open edX Learning ("Learning Core").
 """
-__version__ = "0.2.2"
+__version__ = "0.2.3"

openedx_tagging/core/tagging/rest_api/v1/views.py

@@ -242,6 +242,18 @@ def get_queryset(self) -> models.QuerySet:
         )
         query_params.is_valid(raise_exception=True)
         taxonomy_id = query_params.data.get("taxonomy", None)
+
+        # Checks the permission for the object_id
+        objectid_perm = self.request.user.has_perm(
+            "oel_tagging.view_objecttag_objectid",
+            # The obj arg expects an object, but we are passing a string
+            object_id,  # type: ignore[arg-type]
+        )
+
+        if not objectid_perm:
+            raise PermissionDenied(
+                "You do not have permission to view object tags for this object_id."
+            )
         return get_object_tags(object_id, taxonomy_id)
 
     def retrieve(self, request, *args, **kwargs):
@@ -255,7 +267,7 @@ def retrieve(self, request, *args, **kwargs):
         path and returns a it as a single result however that is not
         behavior we want.
         """
-        object_tags = self.get_queryset()
+        object_tags = self.filter_queryset(self.get_queryset())
         serializer = ObjectTagSerializer(object_tags, many=True)
         return Response(serializer.data)
 

openedx_tagging/core/tagging/rules.py

@@ -65,6 +65,16 @@ def can_change_tag(user: UserType, tag: Tag | None = None) -> bool:
     )
 
 
+@rules.predicate
+def can_view_object_tag_objectid(_user: UserType, _object_id: str) -> bool:
+    """
+    Nobody can view object tags without checking the permission for the tagged object.
+
+    This rule should be defined in other apps for proper permission checking.
+    """
+    return False
+
+
 @rules.predicate
 def can_change_object_tag_objectid(_user: UserType, _object_id: str) -> bool:
     """
@@ -124,5 +134,6 @@ def can_change_object_tag(
 rules.add_perm("oel_tagging.view_objecttag", rules.always_allow)
 
 # Users can tag objects using tags from any taxonomy that they have permission to view
+rules.add_perm("oel_tagging.view_objecttag_objectid", can_view_object_tag_objectid)
 rules.add_perm("oel_tagging.change_objecttag_taxonomy", can_view_taxonomy)
 rules.add_perm("oel_tagging.change_objecttag_objectid", can_change_object_tag_objectid)

tests/openedx_tagging/core/tagging/test_views.py

@@ -15,6 +15,7 @@
 from openedx_tagging.core.tagging.models import ObjectTag, Tag, Taxonomy
 from openedx_tagging.core.tagging.models.system_defined import SystemDefinedTaxonomy
 from openedx_tagging.core.tagging.rest_api.paginators import TagsPagination
+from openedx_tagging.core.tagging.rules import can_change_object_tag_objectid, can_view_object_tag_objectid
 
 User = get_user_model()
 
@@ -404,11 +405,23 @@ class TestObjectTagViewSet(APITestCase):
 
     def setUp(self):
 
-        def _object_permission(_user, object_id: str) -> bool:
+        def _change_object_permission(user, object_id: str) -> bool:
             """
-            Everyone have object permission on object_id "abc"
+            Everyone have object permission on object_id "abc" and "limit_tag_count"
             """
-            return object_id in ("abc", "limit_tag_count")
+            if object_id in ("abc", "limit_tag_count"):
+                return True
+
+            return can_change_object_tag_objectid(user, object_id)
+
+        def _view_object_permission(user, object_id: str) -> bool:
+            """
+            Everyone have object permission on object_id "abc", "limit_tag_count" and "view_only"
+            """
+            if object_id in ("abc", "limit_tag_count", "view_only"):
+                return True
+
+            return can_view_object_tag_objectid(user, object_id)
 
         super().setUp()
 
@@ -478,15 +491,16 @@ def _object_permission(_user, object_id: str) -> bool:
             self.dummy_taxonomies.append(taxonomy)
 
         # Override the object permission for the test
-        rules.set_perm("oel_tagging.change_objecttag_objectid", _object_permission)
+        rules.set_perm("oel_tagging.change_objecttag_objectid", _change_object_permission)
+        rules.set_perm("oel_tagging.view_objecttag_objectid", _view_object_permission)
 
     @ddt.data(
         (None, "abc", status.HTTP_403_FORBIDDEN, None),
         ("user", "abc", status.HTTP_200_OK, 81),
         ("staff", "abc", status.HTTP_200_OK, 81),
         (None, "non-existing-id", status.HTTP_403_FORBIDDEN, None),
-        ("user", "non-existing-id", status.HTTP_200_OK, 0),
-        ("staff", "non-existing-id", status.HTTP_200_OK, 0),
+        ("user", "non-existing-id", status.HTTP_403_FORBIDDEN, None),
+        ("staff", "non-existing-id", status.HTTP_403_FORBIDDEN, None),
     )
     @ddt.unpack
     def test_retrieve_object_tags(self, user_attr, object_id, expected_status, expected_count):
@@ -744,7 +758,7 @@ def test_tag_object_without_permission(self, user_attr, expected_status):
             user = getattr(self, user_attr)
             self.client.force_authenticate(user=user)
 
-        url = OBJECT_TAGS_UPDATE_URL.format(object_id="not abc", taxonomy_id=self.enabled_taxonomy.pk)
+        url = OBJECT_TAGS_UPDATE_URL.format(object_id="view_only", taxonomy_id=self.enabled_taxonomy.pk)
 
         response = self.client.put(url, {"tags": ["Tag 1"]}, format="json")
         assert response.status_code == expected_status