public void PlaceOrder(Id <Contact> contact, IDictionary <Id <Coffee>, OrderQuantity> details)
{
if (NotifiedContacts.All(c => c != contact))
{
throw new ContactNotPartOfRoastingEventException(contact);
}
if (Orders.Any(o => o.Contact == contact))
{
throw new ContactAlreadyPlacedOrderException(contact);
}
var invalidCoffees = new List <Id <Coffee> >();
var totalCost = 0m;
foreach (var detail in details)
{
var(coffee, qty) = detail;
var offeredCoffee = OfferedCoffees.Values.FirstOrDefault(c => c.Id == coffee);
if (offeredCoffee == null)
{
invalidCoffees.Add(coffee);
continue;
}
var subTotal = offeredCoffee.Price * qty;
totalCost += subTotal;
}
if (invalidCoffees.Any())
{
throw new OrderContainedInvalidCoffeesException(invalidCoffees);
}
var order = CreateOrder(contact, details, totalCost);
Orders = Orders.Concat(new [] { order });
}
public void AddNotifiedContact(Id <Contact> contact)
{
NotifiedContacts = NotifiedContacts.Concat(new[] { contact }).Distinct();
}
