Refactoring

lib/com/Events.js

+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 ConnectionClosedEvent extends Event {
+  constructor() {
+    super("connectionclosed");
+  }
+}
+
+export {DataEvent, ConnectionOpenedEvent, ConnectionClosedEvent};
\ No newline at end of file

lib/com/WebSocketClient.js

+import Observable from "../utils/Observable.js";
+import { ConnectionOpenedEvent, DataEvent } from "./Events.js";
+
+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);
+}
+
+export default WebSocketClient;
\ No newline at end of file

lib/index.js

-/* eslint-env browser */
-
-import { Event, Observable } from "./Observable.js";
-import WebSocketClient from "./WebSocketClient.js";
+import Observable from "./utils/Observable.js";
+import WebSocketClient from "./com/WebSocketClient.js";
 
 class GazeClient extends Observable {
 
@@ -12,21 +10,22 @@ class GazeClient extends Observable {
   connect(url) {
     this.url = url;
     this.client = new WebSocketClient();
-    this.client.addEventListener("connected", this.onConnected.bind(this));
-    this.client.addEventListener("gazeDataAvailable", this.onGazeDataAvailable
+    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);
   }
 
-  onOpen() {
-    this.client.send("hello server");
+  onConnected(event) {
+    this.notifyAll(event);
   }
 
-  onConnected(event) {
-    // TODO: Implement event broadcasting
+  onDisconnected(event) {
+    this.notifyAll(event);
   }
 
-  onGazeDataAvailable(event) {
+  onDataAvailable(event) {
     this.notifyAll(event);
   }
 

lib/utils/Observable.js

+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);
+      }
+    }
+  }
+
+}
+
+export default Observable;
\ No newline at end of file