feat: implement pong service

apps/browser/src/background/main.background.ts

@@ -265,6 +265,7 @@ import { BrowserApi } from "../platform/browser/browser-api";
 import { flagEnabled } from "../platform/flags";
 import { IpcBackgroundService } from "../platform/ipc/ipc-background.service";
 import { IpcContentScriptManagerService } from "../platform/ipc/ipc-content-script-manager.service";
+import { IpcPongService } from "../platform/ipc/ipc-pong.service";
 import { UpdateBadge } from "../platform/listeners/update-badge";
 /* eslint-disable no-restricted-imports */
 import { ChromeMessageSender } from "../platform/messaging/chrome-message.sender";
@@ -412,6 +413,7 @@ export default class MainBackground {
 
   ipcContentScriptManagerService: IpcContentScriptManagerService;
   ipcService: IpcService;
+  ipcPongService: IpcPongService;
 
   onUpdatedRan: boolean;
   onReplacedRan: boolean;
@@ -1333,6 +1335,8 @@ export default class MainBackground {
       this.authService,
       this.logService,
     );
+
+    this.ipcPongService = new IpcPongService(this.ipcService);
   }
 
   async bootstrap() {
@@ -1407,6 +1411,7 @@ export default class MainBackground {
 
     await this.initOverlayAndTabsBackground();
     await this.ipcService.init();
+    await this.ipcPongService.init();
 
     return new Promise<void>((resolve) => {
       setTimeout(async () => {

apps/browser/src/platform/ipc/ipc-pong.service.ts

@@ -0,0 +1,23 @@
+import { IpcService } from "@bitwarden/common/platform/ipc";
+import { Utils } from "@bitwarden/common/platform/misc/utils";
+
+/**
+ * Example service that responds to "ping" messages with "pong".
+ * This is a simple example of how to use the IpcService to send and receive messages.
+ * It listens for incoming messages and sends a response back to the sender.
+ */
+export class IpcPongService {
+  constructor(private ipcService: IpcService) {}
+
+  /** Must be initalized after IpcService */
+  async init() {
+    this.ipcService.messages$.subscribe((message) => {
+      if (Utils.fromBufferToUtf8(new Uint8Array(message.data)) === "ping") {
+        void this.ipcService.send({
+          data: Array.from(Utils.fromUtf8ToArray("pong")),
+          destination: message.source,
+        });
+      }
+    });
+  }
+}