jQuery(function ($) {
    $('body').on('added_to_cart', function () {
        var data = {action: 'woocommerce_piwik_get_cart'};
        $.post(wc_add_to_cart_params.ajax_url, data, function (cartItems) {
            var arrayLength = cartItems.length, revenue = 0;
            for (var i = 0; i < arrayLength; i++) {
                _paq.push(['addEcommerceItem', cartItems[i].sku, cartItems[i].title, JSON.parse(cartItems[i].categories), cartItems[i].price, cartItems[i].quantity]);
                revenue += cartItems[i].price * cartItems[i].quantity
            }
            _paq.push(['trackEcommerceCartUpdate', revenue])
        })
    })
});