@logcomex/aylawc-core/core/event/event-dispatcher.js

An experimental library of web components

import { v4 } from 'uuid';
export class EventDispatcher {
    constructor() {
        this._handlers = {};
    }
    next(event) {
        if (this._handlers[event.name])
            this._handlers[event.name].forEach((evt) => evt.handle(event.payload));
    }
    subscribe(name, fn) {
        const id = v4();
        if (!this._handlers[name])
            this._handlers[name] = [];
        this._handlers[name].push({ id, handle: fn });
        return () => { this.unsubscribe(name, id); };
    }
    unsubscribe(name, id) {
        if (this._handlers[name])
            this._handlers[name] = this._handlers[name].filter((handler) => handler.id !== id);
    }
    unsubscribeAll() {
        this._handlers = {};
    }
}
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