@amelix/phoenix.js/lib/classes/EventEmitter.js

A feature-rich API wrapper for the critically acclaimed chatting app Phoenix.. or something.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
class EventEmitter {
    constructor() {
        this.callbacks = {};
        this.onces = {};
    }
    /**
     * Choose what happens on a particular event broadcasted by this event emitter.
     */
    on(event, callback, once = false) {
        if (!this.callbacks[event])
            this.callbacks[event] = [];
        this.callbacks[event].push(callback);
        if (once)
            this.onces[event] = 0;
    }
    /**
     * Same as on(), except will only run the first time the event is emitted.
     */
    once(event, callback) {
        this.on(event, callback, true);
    }
    emit(event, ...args) {
        if (this.onces[event] === 1)
            return;
        let callbacks = this.callbacks[event];
        if (callbacks) {
            for (let callback of callbacks) {
                callback(...args);
            }
        }
        if (this.onces[event] === 0) {
            this.onces[event] = 1;
        }
    }
}
exports.default = EventEmitter;