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-rw-r--r--synapse/rest/client/v2_alpha/relations.py75
1 files changed, 43 insertions, 32 deletions
diff --git a/synapse/rest/client/v2_alpha/relations.py b/synapse/rest/client/v2_alpha/relations.py
index 7ce485b471..6e52f6d284 100644
--- a/synapse/rest/client/v2_alpha/relations.py
+++ b/synapse/rest/client/v2_alpha/relations.py
@@ -34,6 +34,7 @@ from synapse.http.servlet import (
 from synapse.rest.client.transactions import HttpTransactionCache
 from synapse.storage.relations import (
     AggregationPaginationToken,
+    PaginationChunk,
     RelationPaginationToken,
 )
 
@@ -153,23 +154,28 @@ class RelationPaginationServlet(RestServlet):
         from_token = parse_string(request, "from")
         to_token = parse_string(request, "to")
 
-        if from_token:
-            from_token = RelationPaginationToken.from_string(from_token)
-
-        if to_token:
-            to_token = RelationPaginationToken.from_string(to_token)
-
-        result = yield self.store.get_relations_for_event(
-            event_id=parent_id,
-            relation_type=relation_type,
-            event_type=event_type,
-            limit=limit,
-            from_token=from_token,
-            to_token=to_token,
-        )
+        if event.internal_metadata.is_redacted():
+            # If the event is redacted, return an empty list of relations
+            pagination_chunk = PaginationChunk(chunk=[])
+        else:
+            # Return the relations
+            if from_token:
+                from_token = RelationPaginationToken.from_string(from_token)
+
+            if to_token:
+                to_token = RelationPaginationToken.from_string(to_token)
+
+            pagination_chunk = yield self.store.get_relations_for_event(
+                event_id=parent_id,
+                relation_type=relation_type,
+                event_type=event_type,
+                limit=limit,
+                from_token=from_token,
+                to_token=to_token,
+            )
 
         events = yield self.store.get_events_as_list(
-            [c["event_id"] for c in result.chunk]
+            [c["event_id"] for c in pagination_chunk.chunk]
         )
 
         now = self.clock.time_msec()
@@ -186,7 +192,7 @@ class RelationPaginationServlet(RestServlet):
             events, now, bundle_aggregations=False
         )
 
-        return_value = result.to_dict()
+        return_value = pagination_chunk.to_dict()
         return_value["chunk"] = events
         return_value["original_event"] = original_event
 
@@ -234,7 +240,7 @@ class RelationAggregationPaginationServlet(RestServlet):
 
         # This checks that a) the event exists and b) the user is allowed to
         # view it.
-        yield self.event_handler.get_event(requester.user, room_id, parent_id)
+        event = yield self.event_handler.get_event(requester.user, room_id, parent_id)
 
         if relation_type not in (RelationTypes.ANNOTATION, None):
             raise SynapseError(400, "Relation type must be 'annotation'")
@@ -243,21 +249,26 @@ class RelationAggregationPaginationServlet(RestServlet):
         from_token = parse_string(request, "from")
         to_token = parse_string(request, "to")
 
-        if from_token:
-            from_token = AggregationPaginationToken.from_string(from_token)
-
-        if to_token:
-            to_token = AggregationPaginationToken.from_string(to_token)
-
-        res = yield self.store.get_aggregation_groups_for_event(
-            event_id=parent_id,
-            event_type=event_type,
-            limit=limit,
-            from_token=from_token,
-            to_token=to_token,
-        )
-
-        defer.returnValue((200, res.to_dict()))
+        if event.internal_metadata.is_redacted():
+            # If the event is redacted, return an empty list of relations
+            pagination_chunk = PaginationChunk(chunk=[])
+        else:
+            # Return the relations
+            if from_token:
+                from_token = AggregationPaginationToken.from_string(from_token)
+
+            if to_token:
+                to_token = AggregationPaginationToken.from_string(to_token)
+
+            pagination_chunk = yield self.store.get_aggregation_groups_for_event(
+                event_id=parent_id,
+                event_type=event_type,
+                limit=limit,
+                from_token=from_token,
+                to_token=to_token,
+            )
+
+        defer.returnValue((200, pagination_chunk.to_dict()))
 
 
 class RelationAggregationGroupPaginationServlet(RestServlet):