Simple Socket.io server for chat-like communication.

package.json

{
  "name": "Socket",
  "description": "Simple Socket.io server for chat-like communication.",
  "version": "0.1.0",
  "main": "server.js",
  "dependencies": {
    "socket.io": "~0.9.16"
  }
}

server.js

var app = require('http').createServer(function (req, res) {}),
    io = require('socket.io').listen(app);

app.listen(8080);

var getRoomClients = function (room) {
    var clients = [];
    io.sockets.clients(room).forEach(function (client) {
        clients.push({node: client.id, user: client.user});
    });

    return clients;
};

io.sockets.on('connection', function (socket) {

    socket.on('room-join', function(room, user) {
        socket.join(room);
        socket.user = user;

        var clients = getRoomClients(room);

        // confirm join to sender
        socket.emit('join', clients);

        // sending to all clients in room except sender
        socket.broadcast.to(room).emit('joined', room, socket.id, user, clients);
    });

    socket.on('room-leave', function(room) {
        socket.leave(room);

        var clients = getRoomClients(room);

        // sending to all clients in room except sender
        socket.broadcast.to(room).emit('left', room, socket.id, socket.user, clients);
    });

    socket.on('room-data', function (room, data, dataType, id) {
        if (id) {
            io.sockets.socket(id).emit('data', room, socket.id, data, dataType);
        } else {
            socket.broadcast.to(room).emit('data', room, socket.id, data, dataType);
        }
    });

    socket.on('disconnect', function () {
        // leave all rooms a client was joined
        var rooms = io.sockets.manager.roomClients[socket.id];
        for (var room in rooms) {
            if (room !== '' && rooms[room]) {
                room = room.slice(1);
                socket.leave(room);

                // send to all clients in room except sender
                socket.broadcast.to(room).emit('left', room, socket.id, socket.user, getRoomClients(room));
            }
        }

        // send to current request socket client
        socket.emit('disconnect');
    });
});