Handle wildcard type filters properly (#14984)

changelog.d/14984.bugfix

@@ -0,0 +1 @@
+Handle wildcard type filters properly for room messages endpoint. Contributed by Mo Balaa.

synapse/storage/databases/main/stream.py

@@ -398,14 +398,25 @@ def filter_to_clause(event_filter: Optional[Filter]) -> Tuple[str, List[str]]:
     clauses = []
     args = []
 
+    # Handle event types with potential wildcard characters
     if event_filter.types:
-        clauses.append(
-            "(%s)" % " OR ".join("event.type = ?" for _ in event_filter.types)
-        )
-        args.extend(event_filter.types)
+        type_clauses = []
+        for typ in event_filter.types:
+            if "*" in typ:
+                type_clauses.append("event.type LIKE ?")
+                typ = typ.replace("*", "%")  # Replace * with % for SQL LIKE pattern
+            else:
+                type_clauses.append("event.type = ?")
+            args.append(typ)
+        clauses.append("(%s)" % " OR ".join(type_clauses))
 
+    # Handle event types to exclude with potential wildcard characters
     for typ in event_filter.not_types:
-        clauses.append("event.type != ?")
+        if "*" in typ:
+            clauses.append("event.type NOT LIKE ?")
+            typ = typ.replace("*", "%")
+        else:
+            clauses.append("event.type != ?")
         args.append(typ)
 
     if event_filter.senders:

tests/rest/client/test_rooms.py

@@ -2155,6 +2155,33 @@ class RoomMessageListTestCase(RoomBase):
         self.assertEqual(len(chunk), 0, [event["content"] for event in chunk])
 
 
+class RoomMessageFilterTestCase(RoomBase):
+    """Tests /rooms/$room_id/messages REST events."""
+
+    user_id = "@sid1:red"
+
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        self.room_id = self.helper.create_room_as(self.user_id)
+
+    def test_room_message_filter_wildcard(self) -> None:
+        # Send a first message in the room, which will be removed by the purge.
+        self.helper.send(self.room_id, "message 1", type="f.message.1")
+        self.helper.send(self.room_id, "message 1", type="f.message.2")
+        self.helper.send(self.room_id, "not returned in filter")
+        channel = self.make_request(
+            "GET",
+            "/rooms/%s/messages?access_token=x&dir=b&filter=%s"
+            % (
+                self.room_id,
+                json.dumps({"types": ["f.message.*"]}),
+            ),
+        )
+        self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body)
+
+        chunk = channel.json_body["chunk"]
+        self.assertEqual(len(chunk), 2, [event["content"] for event in chunk])
+
+
 class RoomSearchTestCase(unittest.HomeserverTestCase):
     servlets = [
         synapse.rest.admin.register_servlets_for_client_rest_resource,

tests/rest/client/utils.py

@@ -364,6 +364,7 @@ class RestHelper:
         tok: Optional[str] = None,
         expect_code: int = HTTPStatus.OK,
         custom_headers: Optional[Iterable[Tuple[AnyStr, AnyStr]]] = None,
+        type: str = "m.room.message",
     ) -> JsonDict:
         if body is None:
             body = "body_text_here"
@@ -372,7 +373,7 @@ class RestHelper:
 
         return self.send_event(
             room_id,
-            "m.room.message",
+            type,
             content,
             txn_id,
             tok,