Shopping cart express+node middleware

node-express-cart.js

var Cart = function(storedItems) {
  var items = storedItems || {};

  this.add = function(item, sku) {
    var storedItem = items[sku];
    if (storedItem == undefined) {
      storedItem = items[sku] = {quantity: 0, item: item}
    }
    storedItem.quantity += 1;
  };

  // dumb name for now. figure out forEach stuff
  this.to_a = function() {
    var arr = [];
    for (sku in items) { arr.push(items[sku]); }
    return arr;
  };

  this.dump = function() { return items; };
};

// Exports

exports.dandee = {

  cart: function(req, res, next) {
    var cart = new Cart(req.session.cart);
    req.cart = cart;
    next();
    req.session.cart = cart.dump();
    return;
  }

};