6c01ff2a3d
refs https://github.com/TryGhost/Team/issues/1054 This package will be used as a singleton for listenig and sending events throughout the members application.
45 lines
887 B
JavaScript
45 lines
887 B
JavaScript
const EventEmitter = require('events').EventEmitter;
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/**
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* @template T
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* @typedef {import('./').ConstructorOf<T>} ConstructorOf<T>
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*/
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/**
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* @template Data
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* @typedef {object} IEvent
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* @prop {Date} timestamp
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* @prop {Data} data
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*/
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class DomainEvents {
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/**
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* @private
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* @type EventEmitter
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*/
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static ee = new EventEmitter;
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/**
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* @template Data
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* @template {IEvent<Data>} EventClass
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* @param {ConstructorOf<EventClass>} Event
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* @param {(event: EventClass) => void} handler
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*
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* @returns {void}
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*/
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static subscribe(Event, handler) {
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DomainEvents.ee.on(Event.name, handler);
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}
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/**
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* @template Data
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* @param {IEvent<Data>} event
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* @returns {void}
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*/
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static dispatch(event) {
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DomainEvents.ee.emit(event.constructor.name, event);
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}
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}
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module.exports = DomainEvents;
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