CODEWITHSUNDEEP
socket.iosocket.io-1.0
Salvador Dali
Salvador Dali

Reputation: 222511

Send a message to all rooms a client is connected to

I am using socket.io version 1 and I have the following problem.

I have an application, in which user can connect to different rooms. On disconnect event I want this user to notify that he left the rooms he connected to. (I know that on disconnect user leaves all rooms automatically, but I want to notify others that user left them.)

I looked into this list and have not found a simple way to do what I want. May be there is a better way to do this, but currently my solution is to find all rooms and in a loop sent to all people in each room. But neither io.sockets.manager, nor adapter can give me a list of rooms a client is connected to.

client.on('disconnect', function() {
   // io.sockets.manager.roomClients[client.id];
   // io.sockets.adapter.roomClients[client.id];
});

P.S. Seeing one wrong answer, I want to clarify. I know how to send message to people in the room. I want to solve another problem. If a user entered Room1, Room2, ..., RoomN and then disconnects, I want to send message to all people in these N rooms.

Upvotes: 3

Views: 2241

Answers (1)

Oleg
Oleg

Reputation: 23277

You can find all rooms a client is connected to with Socket#rooms object (documentation):

io.on('connection', function(socket) {
    //...
    console.log(socket.rooms);
});

You can then easily send a message to each of these rooms in a loop.

Caveat: socket.join method is async, so if you have something like:

socket.join('my room name');
console.log(socket.rooms);

it won't work as expected. Instead you should write:

socket.join('my room name', function() {
    console.log(socket.rooms);
});

Edit:

If you want to get an array rather than object, you may do this:

Object.keys(socket.rooms);

Upvotes: 2

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