Update external barcode scanning API (#20470)

src/external_app/external_app_entrypoint.ts

@@ -9,7 +9,19 @@ import { fireEvent } from "../common/dom/fire_event";
 import { mainWindow } from "../common/dom/get_main_window";
 import { showAutomationEditor } from "../data/automation";
 import { HomeAssistantMain } from "../layouts/home-assistant-main";
-import type { EMIncomingMessageCommands } from "./external_messaging";
+import type {
+  EMIncomingMessageBarCodeScanAborted,
+  EMIncomingMessageBarCodeScanResult,
+  EMIncomingMessageCommands,
+} from "./external_messaging";
+
+const barCodeListeners = new Set<
+  (
+    msg:
+      | EMIncomingMessageBarCodeScanResult
+      | EMIncomingMessageBarCodeScanAborted
+  ) => boolean
+>();
 
 export const attachExternalToApp = (hassMainEl: HomeAssistantMain) => {
   window.addEventListener("haptic", (ev) =>
@@ -24,6 +36,19 @@ export const attachExternalToApp = (hassMainEl: HomeAssistantMain) => {
   );
 };
 
+export const addExternalBarCodeListener = (
+  listener: (
+    msg:
+      | EMIncomingMessageBarCodeScanResult
+      | EMIncomingMessageBarCodeScanAborted
+  ) => boolean
+) => {
+  barCodeListeners.add(listener);
+  return () => {
+    barCodeListeners.delete(listener);
+  };
+};
+
 const handleExternalMessage = (
   hassMainEl: HomeAssistantMain,
   msg: EMIncomingMessageCommands
@@ -88,6 +113,22 @@ const handleExternalMessage = (
       success: true,
       result: null,
     });
+  } else if (msg.command === "bar_code/scan_result") {
+    barCodeListeners.forEach((listener) => listener(msg));
+    bus.fireMessage({
+      id: msg.id,
+      type: "result",
+      success: true,
+      result: null,
+    });
+  } else if (msg.command === "bar_code/aborted") {
+    barCodeListeners.forEach((listener) => listener(msg));
+    bus.fireMessage({
+      id: msg.id,
+      type: "result",
+      success: true,
+      result: null,
+    });
   } else {
     return false;
   }

src/external_app/external_messaging.ts

@@ -37,9 +37,11 @@ interface EMOutgoingMessageConfigGet extends EMMessage {
 
 interface EMOutgoingMessageBarCodeScan extends EMMessage {
   type: "bar_code/scan";
+  payload: {
     title: string;
     description: string;
     alternative_option_label?: string;
+  };
 }
 
 interface EMOutgoingMessageBarCodeClose extends EMMessage {
@@ -48,7 +50,9 @@ interface EMOutgoingMessageBarCodeClose extends EMMessage {
 
 interface EMOutgoingMessageBarCodeNotify extends EMMessage {
   type: "bar_code/notify";
+  payload: {
     message: string;
+  };
 }
 
 interface EMOutgoingMessageMatterCommission extends EMMessage {