render dynamic value from passport.socketio to jade view - node.js

Question

I'm relatively new to node and socketio. What I'm trying to achieve is authenticate users using passport and send total number logged user count to the view. Such that if a logged in user can see the total number of current-logged-in users and if a user logs that the count decreases or increases when someone else log-ins respectively.
Using passport.socketio to access authenticated passport user information from a socket.io connection.
In the callback, I'm storing the username in a mongoose collection, and accordingly on the logout removing the user from the collection. I get a count of the number of users in the model which I need to pass and bind to the view. Jade being the template engine. Below is how my onAuthorizeSuccess callback looks like where I try to pass the count to home.jade.
function onAuthorizeSuccess(data, accept) {
var username = data.user.username;
var User = mongoose.model('loggedusers', userSchema);
var user = new User({
username: username
});
user.save(function (err, data) {
if (err) console.log(err);
else {
console.log('Saved : ', data);
}
User.count({}, function (err, c) {
console.log('Count is ' + c);
app.get('/', function (req, res) {
res.render('home', {
count: {
countData: c
}
});
});
});
});
console.log('successful connection to socket.io ');
accept(); //Let the user through
}
And in the jade view I try to set it using
li Logged Users ---> #{countData.c}
But, countData is undefined in the view.
How should I go about rendering a dynamic value from the server to the view in jade?
Any assistance much appreciated.
Thanks,
Arnab

Answer 1

Your variable is wrong you should use instead #{count} with:
res.render('home', {count: c});

Answer 2

Figured this out.
Made a function to server content over a socket, that the control helps updating on the front-end
module.exports = function (socket) {
setInterval(function () {
var UserSchema = require('mongoose').model('loggedusers');
UserSchema.count({}, function(err, c){
console.log('Count is ' + c);
socket.emit('send:count', {
count: c
});
});
}, 1000);
};
And the angular controller
angular.module('myApp.controllers', []).
controller('AppCtrl', function ($scope, socket) {
socket.on('send:count', function (data) {
$scope.count = data.count;
});
});
and in jade {{count}} and add div.container(ng-controller='AppCtrl') should give the updated count on the front-end.
Arnab