Allow desktop app to expose recent rooms in UI integrations (#16940)

src/vector/platform/ElectronPlatform.tsx

@@ -40,11 +40,21 @@ import ToastStore from "matrix-react-sdk/src/stores/ToastStore";
 import GenericExpiringToast from "matrix-react-sdk/src/components/views/toasts/GenericExpiringToast";
 import { logger } from "matrix-js-sdk/src/logger";
 import { MatrixEvent } from "matrix-js-sdk/src/models/event";
+import { BreadcrumbsStore } from "matrix-react-sdk/src/stores/BreadcrumbsStore";
+import { UPDATE_EVENT } from "matrix-react-sdk/src/stores/AsyncStore";
+import { avatarUrlForRoom, getInitialLetter } from "matrix-react-sdk/src/Avatar";
 
 import VectorBasePlatform from "./VectorBasePlatform";
 import { SeshatIndexManager } from "./SeshatIndexManager";
 import { IPCManager } from "./IPCManager";
 
+interface SquirrelUpdate {
+    releaseNotes: string;
+    releaseName: string;
+    releaseDate: Date;
+    updateURL: string;
+}
+
 const isMac = navigator.platform.toUpperCase().includes("MAC");
 
 function platformFriendlyName(): string {
@@ -150,13 +160,29 @@ export default class ElectronPlatform extends VectorBasePlatform {
         });
 
         this.ipc.call("startSSOFlow", this.ssoID);
+
+        BreadcrumbsStore.instance.on(UPDATE_EVENT, this.onBreadcrumbsUpdate);
     }
 
     public async getConfig(): Promise<IConfigOptions> {
         return this.ipc.call("getConfig");
     }
 
-    private onUpdateDownloaded = async (ev, { releaseNotes, releaseName }): Promise<void> => {
+    private onBreadcrumbsUpdate = (): void => {
+        const rooms = BreadcrumbsStore.instance.rooms.slice(0, 7).map((r) => ({
+            roomId: r.roomId,
+            avatarUrl: avatarUrlForRoom(
+                r,
+                Math.floor(60 * window.devicePixelRatio),
+                Math.floor(60 * window.devicePixelRatio),
+                "crop",
+            ),
+            initial: getInitialLetter(r.name),
+        }));
+        this.ipc.call("breadcrumbs", rooms);
+    };
+
+    private onUpdateDownloaded = async (ev: Event, { releaseNotes, releaseName }: SquirrelUpdate): Promise<void> => {
         dis.dispatch<CheckUpdatesPayload>({
             action: Action.CheckUpdates,
             status: UpdateCheckStatus.Ready,

test/unit-tests/vector/platform/ElectronPlatform-test.ts

@@ -20,6 +20,7 @@ import { UpdateCheckStatus } from "matrix-react-sdk/src/BasePlatform";
 import { Action } from "matrix-react-sdk/src/dispatcher/actions";
 import dispatcher from "matrix-react-sdk/src/dispatcher/dispatcher";
 import * as rageshake from "matrix-react-sdk/src/rageshake/rageshake";
+import { BreadcrumbsStore } from "matrix-react-sdk/src/stores/BreadcrumbsStore";
 
 import ElectronPlatform from "../../../../src/vector/platform/ElectronPlatform";
 
@@ -43,7 +44,6 @@ describe("ElectronPlatform", () => {
     const userId = "@alice:server.org";
     const deviceId = "device-id";
 
-    window.electron = mockElectron;
     beforeEach(() => {
         window.electron = mockElectron;
         jest.clearAllMocks();
@@ -260,4 +260,20 @@ describe("ElectronPlatform", () => {
             expect(mockElectron.send).toHaveBeenCalledWith("install_update");
         });
     });
+
+    describe("breacrumbs", () => {
+        it("should send breadcrumb updates over the IPC", () => {
+            const spy = jest.spyOn(BreadcrumbsStore.instance, "on");
+            new ElectronPlatform();
+            const cb = spy.mock.calls[0][1];
+            cb();
+
+            expect(mockElectron.send).toHaveBeenCalledWith(
+                "ipcCall",
+                expect.objectContaining({
+                    name: "breadcrumbs",
+                }),
+            );
+        });
+    });
 });