add event-bus

Author: dweber019

src/app/services/event-bus.service.ts

@@ -0,0 +1,33 @@
+import { autoinject, transient } from 'aurelia-framework';
+import { EventAggregator, Subscription } from 'aurelia-event-aggregator';
+
+export class EventBusEvents {
+  public static IDS = {
+    i18n: {
+      locale: {
+        changed: 'i18n:locale:changed'
+      }
+    }
+  };
+}
+
+@transient()
+@autoinject
+export class EventBusService {
+
+  private disposables: Subscription[] = [];
+
+  constructor(
+    public eventAggregator: EventAggregator
+  ) { }
+
+  public addSubscription(eventId: string, callback: Function): EventBusService {
+    this.disposables.push(this.eventAggregator.subscribe(eventId, callback));
+    return this;
+  }
+
+  public dispose(): void {
+    this.disposables.forEach(d => d.dispose());
+  }
+
+}