Adds a coupon code entry to the checkout page. For FoxyCart v0.7.0

gistfile1.js

// FOR TESTING PURPOSES ONLY
// FoxyCart v0.7.0+
// 2010.12.20

FC.checkout.InitCoupon = function() {
	fc_cart_foot_discount_new = '<tr id="fc_cart_foot_discount_new"><td class="fc_col1" colspan="2"><a href="#" onclick="FC.checkout.AddCoupon(); this.blur(); return false;">Add a coupon</a></td><td class="fc_col2"><input type="text" name="coupon" id="fc_coupon" class="fc_text fc_text_short" value="" style="display:none;" /><a id="fc_coupon_apply" href="javascript:;" style="display:none;">Apply!</a></td></tr>';

	if (jQuery('#fc_cart_foot_discount_new').length == 0) {
		jQuery(fc_cart_foot_discount_new).insertBefore('#fc_cart_foot_shipping');
	}

	jQuery('#fc_coupon_apply').unbind('click').click(function(){
		coupon = jQuery('#fc_coupon').val();
		if (coupon != '') {
			FC.checkout.ApplyCoupon(coupon);
		} else {
			alert('Please enter a coupon code.');
		}
	});
}

FC.checkout.AddCoupon = function() {
	jQuery("#fc_coupon, #fc_coupon_apply").toggle();
	if (jQuery("#fc_coupon").is(":visible")) {
		jQuery("#fc_coupon")[0].focus();
	}
}

FC.checkout.ApplyCoupon = function(coupon) {
	jQuery('#fc_coupon_apply').html('Loading...');
	jQuery.getJSON('https://' + window.location.hostname + '/cart?output=json&' + FC.checkout.config.session + '&coupon=' + coupon + '&callback=?',
		function(data) {
			if (data.messages.errors.length > 0) {
				alert("We're sorry. An error occurred: " + data.messages.errors[0]);
			} else {
				FC.checkout.BuildCouponTR(data.coupons);
			}
			jQuery('#fc_coupon_apply').html('Apply!');
		}
	);
}

FC.checkout.BuildCouponTR = function(coupons) {
	fc_cart_foot_discounts = '';
	FC.checkout.config.orderDiscount = 0;
	for (coupon in coupons) {
		fc_cart_foot_discounts += '<tr class="fc_cart_foot_discount"><td class="fc_col1" colspan="2">' + coupons[coupon].name + ':</td><td class="fc_col2"><span class="fc_discount">' + FC.formatter.currency(coupons[coupon].discount, true) + '</span></td></tr>';
		FC.checkout.config.orderDiscount += coupons[coupon].discount;
	}
	jQuery(fc_cart_foot_discounts).insertAfter('#fc_cart_foot_subtotal');
	// Set the subtotal amounts
	jQuery('#discount, label[for=discount]').remove();
	if (FC.checkout.config.orderDiscount != 0) {
		discount_total = '<li class="fc_row fc_discount"><label for="discount" class="fc_pre">Discount</label><input type="text" name="discount" id="discount" class="fc_text fc_text_short fc_text_readonly" readonly="readonly" onfocus="this.blur()" value="' + FC.formatter.currency(FC.checkout.config.orderDiscount) + '" /></li>';
		jQuery(discount_total).insertAfter('li.fc_shipping_cost');
	}
	FC.checkout.updatePriceDisplay();

	// Comment the following line out if you want to remove the coupon line once a coupon has been added
	jQuery('#fc_cart_foot_discount_new').remove();
}


jQuery(document).ready(function(){
	var coupon_length = 0;
	for (var c in fc_json.coupons) {
		if (c.hasOwnProperty(key)) coupon_length++;
	}
	if (coupon_length == 0) FC.checkout.InitCoupon();

	// If you'd like to display the "apply coupon" regardless of whether
	// or not a coupon has already been added, comment out the above lines and uncomment the following
	FC.checkout.InitCoupon();
});