vtally/src/lib/SocketAwareEvent.js

An affordable and reliable Tally Light that works via WiFi based on NodeMCU / ESP8266. Supports multiple video mixers.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.SocketAwareEvent = void 0;
/* Takes care that an event on the server is passed through
 * a socket to the browser.
 *
 * The heavy lifting it does is making sure events are registered
 * and unregistered accordingly. This should prevent dangling event
 * listeners as much as possible.
 */
class SocketAwareEvent {
    constructor(eventEmitter, eventName, socket, fnc) {
        this.eventEmitter = eventEmitter;
        this.socket = socket;
        this.eventName = eventName;
        this.eventListener = (...args) => {
            fnc(socket, ...args);
        };
        this.isRegistered = false;
    }
    register() {
        if (!this.isRegistered) {
            console.debug(`Connecting event ${this.eventName} to socket ${this.socket.id}`);
            this.eventEmitter.on(this.eventName, this.eventListener);
            this.socket.on("disconnect", () => this.unregister());
            this.isRegistered = true;
        }
    }
    unregister() {
        if (this.isRegistered) {
            console.debug(`Detatching event ${this.eventName} from socket ${this.socket.id}`);
        }
        this.eventEmitter.off(this.eventName, this.eventListener);
        this.isRegistered = false;
    }
}
exports.SocketAwareEvent = SocketAwareEvent;