Node.js Socket.IO Best way to listen room connection?

Question

Node.js Socket.IO Best way to listen room connection?

My bad way

Client-Side

socket.on('connect',function(){ socket.emit('EnterRoom',{room:'test'});})

Server-Side
app.js

io.sockets.on('connection',function(socket){
   socket.on('EnterRoom', function(data) {   
   socket.join(data.room);    
   app.emit('event:JoinRoom',{room:data.room});    
})});

some-module-with-rooms.js

app.on('event:JoinRoom',function(data){if(data.room=='test'){/*anycode*/} });

node.js
socket.io

Answer 1

From the Wiki about Rooms:

Emitting an event to all clients in a particular room:

io.sockets.in('room').emit('event_name', data)

So in your case:

io.sockets.on('connection',function(socket){
  socket.on('EnterRoom', function(data) {   
    socket.join(data.room)
    io.sockets.in(data.room).emit('JoinRoom', data);    
  })
});

That will emit only to the selected room. You can the access the room:

io.sockets.manager.rooms

and i quote the docs:

This is a hash, with the room name as a key to an array of socket IDs. Note that the room names will have a leading / character