socket.io get rooms which socket is currently in

Question

Is it possible to get rooms which socket is currently in, without calling

io.sockets.clients(roomName)

for every room name and looking for this socket in results

Answer 1

socket.io 1.7.3+ ->

Object.keys( io.sockets.adapter.sids[socket.id] )
// returns [socket.id, room-x'] || [socket.id, 'room-1', 'room-2', ...]

Answer 2

Being sure that socket is in only one room at a time, my solution was:

var currentRoom = Object.keys(io.sockets.adapter.sids[socket.id]).filter(item => item!=socket.id);

Answer 3

socket.io 1.7.3 +

var currentRoom = socket.rooms[Object.keys(socket.rooms)[0]];//returns name of room

Answer 4

Version 1.7.3, socket.rooms contains socket.id, so remove it and get the list of rooms:

Object.keys(socket.rooms).filter(item => item!=socket.id);

In other version, you can print the socket and find the rooms.

Answer 5

1.4.5 version => io.sockets.adapter.rooms[roomname].sockets

Answer 6

You can save room in socket itself when it joins a room

// join room
socket.join(room);

// update socket's rooms
if (socket.rooms) {
    socket.rooms.push(room);
} else {
    socket.rooms = [room];
}

Later you can retrieve all rooms that the socket is in by simply

socket.rooms

From the Server API documentation:

socket.rooms (object)
A hash of strings identifying the rooms this client is in, indexed by room name.

https://socket.io/docs/server-api/#socket-rooms