js add products to cart

gistfile1.js

var productName = $(this).parent().parent().children('.product-name').text();
var product = _.find(db.products, function(p) { return p.name === productName;});
var isAdded = _.find(db.cart.products, function(p){ return p.name === productName; }) === undefined ? false : true;


if(db.customers.length) {
    if(!db.cart.customer) {
      db.cart.customer = _.find(db.customers, function(cust) { return cust.name === $('#select-customer').val();});
    }
    if(!isAdded) {
      db.cart.products.push(product);
      db.cart.totals.count++;
      db.cart.totals.amount += product.salePrice();
      db.cart.totals.weight += product.weight;

      var shippingCost = db.cart.customer.isDomestic ? 0.5 : 1.5;
      db.cart.totals.shipping += product.weight * shippingCost;
      // htmlAddCartRow(product);
    } else {
      db.cart.products.push(product);
      db.cart.totals.count++;
      db.cart.totals.amount += product.price;
      db.cart.totals.weight += product.weight;

      var shippingCost2 = db.cart.customer.isDomestic ? 0.5 : 1.5;
      db.cart.totals.shipping += product.weight * shippingCost2;
      // htmlUpdateCartRow(product);
    }
    db.cart.totals.grand = db.cart.totals.amount + db.cart.totals.shipping;
  }