Twilio IP messaging, how to unsubscribe from channel

Question

I've written a simple chat using Twilio IP messaging example as a starting point. The idea is to have private channels between various clients and admin. Each client will have a separate private channel with admin. Admin can select which channel to open/subscribe to chat with a particular client.

The issue I'm facing now is I cannot unsubscribe from the channel I previously subscribed.

Here is the link to login as admin, client (test1) and client (test2): http://test.verbery.com/

Steps to reproduce the issue:

1. Click on "Admin (admin1)" to login as admin
2. On the newly opened admin chat page click on the "[email protected]" channel on the left side panel to subscribe to channel and receive messages for this channel.
3. On the main page click on "Client (test1)" to login as client and join a channel [email protected] as a client.
4. Send message from admin to client (test1) and from client (test1) to admin.
5. On admin chat click on the channel [email protected] to subscribe to this new channel and chat with another client (test2); login as client (test2) and chat with admin.
6. The problem now is: you are still receiving messages from [email protected] - try to send messages as a [email protected] client. When you subscribed to [email protected] channel, you haven't unsubscribed from [email protected]

Technical details: To subscribe to a channel I used an event "onMessageAdded" to listen to the incoming messages for this channel:

// Listen for new messages sent to the channel
personalChannel.on('messageAdded', function(message) {
    printMessage(message.author, message.body);
});

To unsubscribe from the messages I've tried unbind('onMessageAdded') and off('onMessageAdded') but it doesn't work, js console says: unbind (or off) is not a function.

Any ideas how to unsubscribe from channel?

Answer 1

If you don't want to leave or unsubscribe channel, you can do this for remove all event in the channel:

activeChannel.removeAllListeners();

I do this, when i switch among channels.

Answer 2

Twilio developer evangelist here.

Bob Sponge is right, you need to call leave() on the channel in order to properly leave it.

personalChannel.leave();

If you are looking to stay connected to the channel, but stop listening from incoming events, you can unbind your listener. You'd actually do that using removeListener rather than off or unbind. This follows the Node.js EventEmitter API.

personalChannel.removeListener("messageAdded");

Let me know if that helps at all.