private async Task NotifyCustomerOfDelay(Customer customer, Order order)
{
var message =
string.Format("Dear {0} {1}, Your order {2} cannot be delivered - please contact customer support",
customer.FirstName, customer.Surname, order.ID);
await EmailClient.Send(customer.EmailAddress, "Failed delivering order", message);
}
public async Task SendOrder(Customer customer, Order order)
{
try
{
var orderEta = CalculateOrderEta(order, customer.Address);
await SendAsync(order, customer.Address);
await NotifyCustomerOfSuccess(customer, order.ID, orderEta);
}
catch (IllegalOrderException exc)
{
await NotifyCustomerOfDelay(customer, order);
throw new OrderProcessingException("Failed to deliver order " + order.ID, exc);
}
}
private DateTime CalculateOrderEta(Order order, Address destination)
{
return _shippingCalculators[order.ShippingMethod].CalculateEta(_originCountry, destination);
}
private async Task SendAsync(Order order, Address address)
{
await Task.FromResult(false);
}