public void PlaceOrder(Order order)
{
if (catalog.HasInventory(order.Product.Id, order.Quantity))
{
try
{
catalog.Remove(order.Product.Id, order.Quantity);
order.Filled = true;
}
catch (InvalidOperationException)
{
// LOG?
}
}
}
public void SubmitOrder(Order order, Action<string> purchaseUrlCallback)
{
try {
SubmitOrderCore(order, purchaseUrlCallback);
}
catch {
purchaseUrlCallback(null);
}
}
private void SubmitOrderCore(Order order, Action<string> purchaseUrlCallback)
{
WebClient webClient = new WebClient();
webClient.DownloadStringCompleted += delegate(object sender, DownloadStringCompletedEventArgs e) {
if ((e.Cancelled == false) && (e.Error == null)) {
string xml = e.Result.Replace(@"xmlns=""http://webservices.amazon.com/AWSECommerceService/2005-03-23""", String.Empty);
if (String.IsNullOrEmpty(xml) == false) {
XDocument doc = XDocument.Parse(xml);
XElement purchaseUrlElement = doc.Descendants("PurchaseURL").Single();
if (purchaseUrlElement != null) {
string purchaseUrl = purchaseUrlElement.Value;
purchaseUrlCallback(purchaseUrl);
return;
}
}
}
purchaseUrlCallback(null);
};
StringBuilder sb = new StringBuilder();
int itemNumber = 1;
foreach (OrderItem item in order.Items) {
sb.AppendFormat(CultureInfo.InvariantCulture, "&Item.{0}.ASIN={1}&Item.{0}.Quantity={2}",
itemNumber, item.Product.ASIN, item.Quantity);
itemNumber++;
}
Uri requestUri = new Uri(String.Format(CartUriFormat, SubscriptionID, sb.ToString()));
webClient.DownloadStringAsync(requestUri);
}
private void OnCheckoutCompleted(string purchaseUrl)
{
if (String.IsNullOrEmpty(purchaseUrl) == false) {
_checkoutUrl = purchaseUrl;
RaisePropertyChanged("CheckoutUrl");
if (OrderCheckedOut != null) {
OrderCheckedOut(this, EventArgs.Empty);
}
_order = null;
_checkoutUrl = null;
RaisePropertyChanged("Order", "CheckoutUrl");
}
IsCheckingOut = false;
}
