Finding number of users online/offline with redis,nodejs

I am using socket.io, redis for tracking users online/offline status. Here I am storing the no.of users with name as key with the pattern hub_id. I am able to get the number of users by just getting count of keys matching hub_ pattern. Now the key has value as status online or offline.

I am unable to get the no. users online or offline variable outside the for loop.

  app.get('/test', function(req, res) {
  client.keys('hub*', function (err, keys) {
    console.log(keys.length);
    for (var i=0; i<keys.length; i++){
    client.hgetall(keys[i], function(err, reply) {
    if(reply.status == "online"){
      onlinehub++;
    }
    else if(reply.status == "offline"){
      offlinehub++;
    }
  });
  }
    console.log(onlinehub +"-" +offlinehub)

    });
});

via Karthikeyan Prakash