Add support for multiple rooms

src/app.js

@@ -6,6 +6,7 @@ import Redis from 'connect-redis';
 import Io from 'socket.io';
 import http from 'http';
 import shortid from 'shortid';
+import _ from 'underscore';
 
 const app = express();
 const server = http.createServer(app);
@@ -22,7 +23,7 @@ const sessionMiddleware = session({
   saveUninitialized: true
 });
 
-let numUsers = 0;
+var rooms = [];
 
 io.use(function(socket, next) {
   sessionMiddleware(socket.request, socket.request.res, next);
@@ -34,15 +35,16 @@ app.set('views', __dirname + '/views');
 app.use(sessionMiddleware);
 app.use(express.static(__dirname + '/public'));
 
-// Routes
+class Room {
+  constructor(id) {
+    this.id = id;
+    this.numUsers = 0;
+    this.init();
+  }
+  init() {
+    const thisIO = io.of(this.id);
 
-app.get('/', (req, res) => {
-
-  res.render('index', {username: shortid.generate()});
-});
-
-
-io.on('connection', (socket) => {
+    thisIO.on('connection', (socket) => {
       let addedUser = false;
 
       // when the client emits 'new message', this listens and executes
@@ -59,15 +61,15 @@ io.on('connection', (socket) => {
 
         // we store the username in the socket session for this client
         socket.username = username;
-    ++numUsers;
+        ++this.numUsers;
         addedUser = true;
         socket.emit('login', {
-      numUsers: numUsers
+          numUsers: this.numUsers
         });
         // echo globally (all clients) that a person has connected
         socket.broadcast.emit('user joined', {
           username: socket.username,
-      numUsers: numUsers
+          numUsers: this.numUsers
         });
       });
 
@@ -88,16 +90,37 @@ io.on('connection', (socket) => {
       // when the user disconnects.. perform this
       socket.on('disconnect', () => {
         if (addedUser) {
-      --numUsers;
+          --this.numUsers;
 
           // echo globally that this client has left
           socket.broadcast.emit('user left', {
             username: socket.username,
-        numUsers: numUsers
+            numUsers: this.numUsers
           });
+
+          // remove room from rooms array
+          if (this.numUsers === 0) {
+            rooms = _.without(rooms, _.findWhere(rooms, {id: this.id}));
+          }
         }
       });
     });
+  }
+}
+
+// Routes
+
+app.get('/', (req, res) => {
+  const id = shortid.generate();
+  const room = new Room(id);
+  rooms.push(room);
+
+  res.redirect(`/${id}`);
+});
+
+app.get('/*', (req, res) => {
+  res.render('index', {username: shortid.generate()});
+});
 
 server.listen(3000, () => {
   console.log('fatty is on.');

src/public/main.js

@@ -22,7 +22,11 @@ $(function() {
   var lastTypingTime;
   var $currentInput = $usernameInput.focus();
 
-  var socket = io();
+  var roomId = window.location.pathname.length ? window.location.pathname : null;
+
+  if (!roomId) return;
+
+  var socket = io(roomId);
 
   function addParticipantsMessage (data) {
     var message = '';