Support dynamic room predecessors in ForwardDialog (#10344)

Author: andybalaam

src/components/views/dialogs/ForwardDialog.tsx

@@ -227,11 +227,16 @@ const ForwardDialog: React.FC<IProps> = ({ matrixClient: cli, event, permalinkCr
     const lcQuery = query.toLowerCase();
 
     const previewLayout = useSettingValue<Layout>("layout");
+    const msc3946DynamicRoomPredecessors = useSettingValue<boolean>("feature_dynamic_room_predecessors");
 
     let rooms = useMemo(
         () =>
-            sortRooms(cli.getVisibleRooms().filter((room) => room.getMyMembership() === "join" && !room.isSpaceRoom())),
-        [cli],
+            sortRooms(
+                cli
+                    .getVisibleRooms(msc3946DynamicRoomPredecessors)
+                    .filter((room) => room.getMyMembership() === "join" && !room.isSpaceRoom()),
+            ),
+        [cli, msc3946DynamicRoomPredecessors],
     );
 
     if (lcQuery) {

test/components/views/dialogs/ForwardDialog-test.tsx

@@ -36,6 +36,7 @@ import {
     mockPlatformPeg,
 } from "../../../test-utils";
 import { TILE_SERVER_WK_KEY } from "../../../../src/utils/WellKnownUtils";
+import SettingsStore from "../../../../src/settings/SettingsStore";
 
 describe("ForwardDialog", () => {
     const sourceRoom = "!111111111111111111:example.org";
@@ -325,4 +326,31 @@ describe("ForwardDialog", () => {
             );
         });
     });
+
+    describe("If the feature_dynamic_room_predecessors is not enabled", () => {
+        beforeEach(() => {
+            jest.spyOn(SettingsStore, "getValue").mockReturnValue(false);
+        });
+
+        it("Passes through the dynamic predecessor setting", async () => {
+            mockClient.getVisibleRooms.mockClear();
+            mountForwardDialog();
+            expect(mockClient.getVisibleRooms).toHaveBeenCalledWith(false);
+        });
+    });
+
+    describe("If the feature_dynamic_room_predecessors is enabled", () => {
+        beforeEach(() => {
+            // Turn on feature_dynamic_room_predecessors setting
+            jest.spyOn(SettingsStore, "getValue").mockImplementation(
+                (settingName) => settingName === "feature_dynamic_room_predecessors",
+            );
+        });
+
+        it("Passes through the dynamic predecessor setting", async () => {
+            mockClient.getVisibleRooms.mockClear();
+            mountForwardDialog();
+            expect(mockClient.getVisibleRooms).toHaveBeenCalledWith(true);
+        });
+    });
 });