WebSocketClient.js

/* eslint-env browser */

import { Observable, Event } from "./Observable.js";

class GazeDataEvent extends Event {
  constructor(data) {
    super("gazeDataAvailable", data);
  }
}

class ConnectionEvent extends Event {
  constructor() {
    super("connected");
  }
}

class WebSocketClient extends Observable {

  constructor() {
    super();
  }

  connect(url) {

    this.ws = new WebSocket(url);
    this.ws.onopen = onOpen.bind(this);
    this.ws.onmessage = onMessage.bind(this);
  }

}

function onOpen() {
  let connectionEvent = new ConnectionEvent();
  this.notifyAll(connectionEvent);
}

function onMessage(event) {
  let gazeEvent = new GazeDataEvent(event.data);
  this.notifyAll(gazeEvent);
}

export default WebSocketClient;