/// <summary>
/// Executes the specified order.
/// This is a main enty point into application.
/// In real application we can expose it via REST API. But please note:
/// - This is a Domain Service, and it expects already prepared Order domain object.
/// - In case of REST API, we would need to create an Application Service that gets Order Data Transfer Object (DTO), wich then would be transformed into our domain Order object.
/// - This, for example, would include validating whether Client specified in order exists in our system.
/// </summary>
/// <param name="order">The order.</param>
/// <returns></returns>
public decimal Execute(Order order)
{
if (order == null)
{
throw new ArgumentNullException("order");
}
// Split order on deals and then execute them
order.Deals = _orderSplitService.Split(order);
// NOTE: In real application, deals execution and inserting order must be executed in scope of one transaction
foreach (var deal in order.Deals)
{
deal.Execute();
}
// Keep audit trail of order
_orderRepository.Insert(order);
var totalCost = order.Deals.Sum(q => q.TotalCost);
return(totalCost);
}
