lpio/realtime.js

The last dashboard app you'll ever need

var _ = require('underscore');
var Q = require('q');

var log = require('./log');

exports.start = function start(io,socket) {
    log.info("Socket "+socket.id+" Connected");
    socket.on('registerDataIds', function (data) {

        if(_.isArray(data.dataIds)){

            log.info("joining "+data.dataIds.length+" rooms by "+socket.id);

            var rooms = socket.rooms;
            var new_rooms = data.dataIds;
            new_rooms.push(socket.id);

            var q_all = [];

            _.difference(rooms,new_rooms).forEach( function(room){
                log.info("leaving: " + room + " by: "+socket.id);
                socket.leave(room);
            });

            _.difference(new_rooms,rooms).forEach( function(key, index){
                var widget = data.dataIds[index];
                var defer = Q.defer();
                q_all.push(defer.promise);
                socket.join(key,function(err){
                    if(err){
                        defer.reject(err);
                        return log.error(err,"Error joining room "+key);
                    }
                    log.info("joining: " + key);
                    defer.resolve(true);

                    // @TODO: get from cache
                    io.to(socket.id).emit('update',{});

                });
            }); // data.widgets.every

            Q.all(q_all)
                .catch(function(err){
                    log.error(err);
                });
        }
    });

    socket.on('disconnect', function () {
        log.info("Socket "+socket.id+" Disconnected");
    });
}