feat: migrate to Broadcast Channel API

Signed-off-by: John Molakvoæ <skjnldsv@protonmail.com>

Author: skjnldsv

lib/SimpleBus.ts

@@ -5,6 +5,23 @@ import { EventHandler } from "./EventHandler.js";
 export class SimpleBus implements EventBus {
 
     private handlers = new Map<string, EventHandler[]>();
+    private channel: BroadcastChannel;
+
+    constructor() {
+        this.channel = new BroadcastChannel('nextcloud')
+        
+        console.debug('SimpleBus 2 created', this)
+        // Global broadcast channel
+        this.channel.onmessage = (event) => {
+            (this.handlers.get(event.data.name) || []).forEach(h => {
+                try {
+                    h(event.data.event)
+                } catch (e) {
+                    console.error('could not invoke event listener', e)
+                }
+            })
+        }
+    }
 
     getVersion(): string {
       return globalThis.__pkg_version;
@@ -19,13 +36,12 @@ export class SimpleBus implements EventBus {
     }
 
     emit(name: string, event: Event): void {
-        (this.handlers.get(name) || []).forEach(h => {
-            try {
-                h(event)
-            } catch (e) {
-                console.error('could not invoke event listener', e)
-            }
-        })
+        try {
+            const data = { name, event }
+            console.debug('Bus emit', data);
+            this.channel.postMessage(data);
+        } catch (e) {
+            console.error('could not emit event', e)
+        }
     }
-
 }