| 1 | export class EventBus {
|
| 2 | public listeners = {};
|
| 3 |
|
| 4 | public emit(event: string, data?) {
|
| 5 | if (this.listeners[event]) {
|
| 6 | this.listeners[event].forEach(listener => listener(data));
|
| 7 | }
|
| 8 | }
|
| 9 |
|
| 10 | public on(event: string, listener: (data) => void) {
|
| 11 | if (!this.listeners[event]) {
|
| 12 | this.listeners[event] = [];
|
| 13 | }
|
| 14 | this.listeners[event].push(listener);
|
| 15 | }
|
| 16 |
|
| 17 | public unsubscribe(listener: (data) => void) {
|
| 18 | Object.values(this.listeners).forEach((listeners: any[]) => {
|
| 19 | const index = listeners.indexOf(listener);
|
| 20 | if (index > -1) {
|
| 21 | listeners.splice(index, 1);
|
| 22 | }
|
| 23 | });
|
| 24 | }
|
| 25 | }
|
| 26 |
|
| 27 | export const eventBus = new EventBus();
|