server/ws.js


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var server = require('socket.io')

var ws = module.exports = {}

var rooms = {}

ws.listen = function(app){
  ws.io = server(app)
}
ws.add = function(name){
  if (name in rooms) { return }
  var room = {}
  room.users = {}
  
  var ns = base.io.of('/' + name)
  
  ns.on('connection', function(socket){
    
    var username
  
    socket.on('join', function(data){
      username = data.username
      if (room.users[username]) {
        // already connected?
        room.users[username].disconnect()
        room.users[username] = socket
      }
    })
    
    socket.on('message', function(data){
      ns.emit('message', data)
    })
    
    socket.on('disconnect', function(){
      delete room.users[username]
    })

  })
}