45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
export class EventBus {
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constructor() {
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this.events = new Map();
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}
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emit(id, data = {}) {
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let ev = this.events.get(id);
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if (!ev) {
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let ev = new EventItem(id);
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this.events.set(id, ev);
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return;
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}
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ev.subscribers.forEach((subscriber) => {
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subscriber(data);
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});
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}
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subscribe(id, subscriber) {
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let ev = this.events.get(id);
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if (!ev) {
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ev = new EventItem(id);
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this.events.set(id, ev);
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}
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ev.subscribers.push(subscriber);
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}
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unsubscribe(id, subscriber) {
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if (this.events.has(id)) {
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let ev = this.events.get(id);
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ev.subscribers = ev.subscribers.filter((fn) => fn !== subscriber);
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if (ev.subscribers.length < 1) {
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this.events.delete(id);
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}
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}
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}
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unsubscribeAll(id) {
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if (this.events.has(id)) {
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this.events.delete(id);
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}
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}
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}
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export class EventItem {
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constructor(id) {
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this.id = id;
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this.subscribers = [];
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}
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}
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