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October 10, 2015 22:06
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Simple ES6 Event Bus implementation
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| class Listeners { | |
| constructor() { | |
| this.list = {}; | |
| } | |
| create(eventName, id, cb) { | |
| if (!this.list[eventName]) { | |
| this.list[eventName] = {}; | |
| } | |
| this.list[eventName][id] = cb; | |
| } | |
| destroy(eventName, id) { | |
| delete this.list[eventName][id]; | |
| } | |
| fire(eventName, args) { | |
| _.each(this.list[eventName], cb => { | |
| cb.apply(window, args); | |
| }); | |
| } | |
| } | |
| class EventBus { | |
| constructor() { | |
| this.listeners = new Listeners(); | |
| } | |
| subscribe(eventName, id, cb, once) { | |
| this.listeners.create(eventName, id, cb); | |
| if (once) { | |
| this.unsubscribe(eventName, id); | |
| } | |
| } | |
| once(eventName, id, cb) { | |
| this.subscribe(eventName, id, cb, true); | |
| } | |
| unsubscribe(eventName, id) { | |
| this.listeners.destroy(eventName, id); | |
| } | |
| broadcast(eventName, args) { | |
| this.listeners.fire(eventName, args); | |
| } | |
| } | |
| export default new EventBus(); |
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