(function(){"use strict";class Observable{constructor(){this.listeners={}}addEventListener(type,callback){if(this.listeners[type]===undefined){this.listeners[type]=[]}this.listeners[type].push(callback)}notifyAll(event){let listeners=this.listeners[event.type];if(listeners){for(let i=0;i<listeners.length;i++){listeners[i](event)}}}}class Event{constructor(type,data){this.type=type;this.data=data}}class DataEvent extends Event{constructor(data){super("dataavailable",data)}}class ConnectionOpenedEvent extends Event{constructor(){super("connectionopened")}}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 ConnectionOpenedEvent;this.notifyAll(connectionEvent)}function onMessage(event){let dataEvent=new DataEvent(event.data);this.notifyAll(dataEvent)}class GazeClient extends Observable{constructor(){super()}connect(url){this.url=url;this.client=new WebSocketClient;this.client.addEventListener("connectionopened",this.onConnected.bind(this));this.client.addEventListener("connectionclosed",this.onDisconnected.bind(this));this.client.addEventListener("dataAvailable",this.onDataAvailable.bind(this));this.client.connect(url)}onConnected(event){this.notifyAll(event)}onDisconnected(event){this.notifyAll(event)}onDataAvailable(event){this.notifyAll(event)}}window.GazeClient=GazeClient})();
