config.js

var config  = module.exports = {};

config.server = {
  views: {
    engines: {
      jade: require('jade')
    },
    basePath: __dirname,
    path: './templates',
    partialsPath: './templates/partials',
    layout: false
  }

};

if( process.env.NODE_ENV === 'dev'){
  config.server.debug = { request : ['error']};
}

server.js

var Hapi   = require('hapi');
var routes = require('./routes.js');
var config = require('./config.js');
var userSessions = require('./services/users');

// load environment variables.
var dotenv = require('dotenv');
dotenv.load();

// Create a server with a host and port
var server = new Hapi.Server(process.env.HOST, parseInt(process.env.PORT), config.server);

server.ext('onPreHandler', function(request, next){
  if( request.session.get('user') === undefined ){
    request.session.set('user', {id: request.session.id});
  }
  next()
});
server.pack.register({
    plugin: require('yar'),
    options: {
      cookieOptions: {
        password: "its a password",
        isSecure: false,
      },
      maxCookieSize: 0,
      cache: {
        engine: require('catbox-redis'),
        host: '127.0.0.1',
        port: '6379'
      }
    }
  }, function(err){
    if(err){
      console.log(err)
    }
  // Add the route
  server.route(routes);

  if (!module.parent) {
    server.start(function() {
        console.log("Server started at " + process.env.HOST + " on port: " + process.env.PORT)
    });
  }
});
// Start the server

module.exports = server;

update-cart.js

var path = require('path');
var _ = require('lodash');
var Cart = require(path.join(__dirname + './../../assets/js/cart'));
var inventory = require(path.join(__dirname + './../../inventory.json')); // This will replaced with a DB ideally.
var Hoek = require('Hoek');

module.exports = function (request, reply) {
  var updatedCart = request.payload;
  var newCart = new Cart(true);
  _.forEach(updatedCart.items, function(item){
    var inventoryItem = _.find(inventory, {name: item.name});
    if( inventoryItem ){
      newCart.addItem(inventoryItem, item.quantity);
    }
  });

  var user = request.session.get('user');
  user.cart = newCart.items;
  request.session.set('user', user);
  reply(newCart);
};