Firebase: How can i use onDisconnect during logout? - angularjs

Question

How can i detect when a user logs out of firebase (either facebook, google or password) and trigger the onDisconnect method in the firebase presence system. .unauth() is not working. I would like to show a users online and offline status when they login and out, minimize the app (idle) - not just when the power off their device and remove the app from active applications on the device.
I'm using firebase simple login for angularjs/ angularfire
Im using code based off of this tutorial on the firebase site.
https://www.firebase.com/blog/2013-06-17-howto-build-a-presence-system.html
Please i need help with this!
Presence code:
var connectedRef = new Firebase(fb_connections);
var presenceRef = new Firebase(fb_url + 'presence/');
var presenceUserRef = new Firebase(fb_url + 'presence/'+ userID + '/status');
var currentUserPresenceRef = new Firebase(fb_url + 'users/'+ userID + '/status');
connectedRef.on("value", function(isOnline) {
if (isOnline.val()) {
// If we lose our internet connection, we want ourselves removed from the list.
presenceUserRef.onDisconnect().remove();
currentUserPresenceRef.onDisconnect().set("<span class='balanced'>☆</span>");
// Set our initial online status.
presenceUserRef.set("<span class='balanced'>★</span>");
currentUserPresenceRef.set("<span class='balanced'>★</span>");
}
});
Logout function:
var ref = new Firebase(fb_url);
var usersRef = ref.child('users');
service.logout = function(loginData) {
ref.unauth();
//Firebase.goOffline(); //not working
loggedIn = false;
seedUser = {};
clearLoginFromStorage();
saveLoginToStorage();
auth.logout();
};

Answer 1

The onDisconnect() code that you provide, will run automatically on the Firebase servers when the connection to the client is lost. To force the client to disconnect, you can call Firebase.goOffline().
Note that calling unauth() will simply sign the user out from the Firebase connection. It does not disconnect, since there might be data that the user still has access to.
Update
This works for me:
var fb_url = 'https://yours.firebaseio.com/';
var ref = new Firebase(fb_url);
function connect() {
Firebase.goOnline();
ref.authAnonymously(function(error, authData) {
if (!error) {
ref.child(authData.uid).set(true);
ref.child(authData.uid).onDisconnect().remove();
}
});
setTimeout(disconnect, 5000);
}
function disconnect() {
ref.unauth();
Firebase.goOffline();
setTimeout(connect, 5000);
}
connect();