/// <summary>
/// Saves an Order and it's Order Items
/// </summary>
/// <param name="orderDTO"></param>
/// <returns>Returns the saved order and order items (including new Id's)</returns>
public OrderDTO Save(OrderDTO orderDTO)
{
Order order;
// transform an order DTO to an order (entity framework)
if (orderDTO.Id == 0)
{
order = new Order { CreatedDate = orderDTO.CreatedDate };
db.Orders.Add(order);
}
else
{
order = db.Orders.Find(orderDTO.Id);
order.ModifiedDate = orderDTO.ModifiedDate;
}
order.Status = orderDTO.Status;
foreach(OrderItemDTO orderItemDTO in orderDTO.OrderItems)
{
// transform an order item DTO to an order item (entity framework)
OrderItem orderItem;
if (orderItemDTO.Id == 0)
{
orderItem = new OrderItem { CreateDate = orderItemDTO.CreateDate };
order.OrderItems.Add(orderItem);
}
else
{
orderItem = order.OrderItems.First(i => i.Id == orderItemDTO.Id);
orderItem.ModifiedDate = orderItemDTO.ModifiedDate;
}
orderItem.ProductCode = orderItemDTO.ProductCode;
orderItem.Price = orderItemDTO.Price;
orderItem.PromotionApplied = orderItemDTO.PromotionApplied;
}
db.SaveChanges();
// retrieve and return the saved dto (to get all Id's, including children)
return Get(order.Id);
}
/// <summary>
/// Get an Order by Id
/// </summary>
/// <param name="id"></param>
/// <returns>Order and Order Items</returns>
public OrderDTO Get(long id)
{
var result = db.Orders.Where(o => o.Id == id);
if (result.Count() == 0)
return null;
Order order = result.ToList()[0];
// transform the order DTO
OrderDTO orderDTO = new OrderDTO()
{
Id = order.Id,
CreatedDate = order.CreatedDate,
ModifiedDate = order.ModifiedDate,
Status = order.Status
};
// transform the order item DTOs
orderDTO.OrderItems = new List<OrderItemDTO>();
foreach(OrderItem orderItem in order.OrderItems)
{
OrderItemDTO orderItemDTO = new OrderItemDTO()
{
Id = orderItem.Id,
CreateDate = orderItem.CreateDate,
ModifiedDate = orderItem.ModifiedDate,
OrderId = orderItem.OrderId,
Price = orderItem.Price,
ProductCode = orderItem.ProductCode,
PromotionApplied = orderItem.PromotionApplied
};
orderDTO.OrderItems.Add(orderItemDTO);
}
return orderDTO;
}
public void ShouldCreateOrder()
{
// save the order
OrderDTO orderDTO = new OrderDTO() { CreatedDate = DateTime.Now, Status = Constants.OrderStatus.Pending };
orderDTO.OrderItems = new List<OrderItemDTO>();
OrderItemDTO orderItemAppleDTO = new OrderItemDTO() { CreateDate = DateTime.Now, Price = 1, ProductCode = "apple" };
orderDTO.OrderItems.Add(orderItemAppleDTO);
OrderItemDTO orderItemNutellaDTO = new OrderItemDTO() { CreateDate = DateTime.Now, Price = 5, ProductCode = "nuttl" };
orderDTO.OrderItems.Add(orderItemNutellaDTO);
orderDTO = orderService.Save(orderDTO);
Assert.IsTrue(orderDTO != null && orderDTO.Id > 0, "Order has not been saved");
Assert.IsTrue(orderDTO.OrderItems != null && orderDTO.OrderItems.Count == 2, "Order items have not been saved");
}
public void CheckoutShoppingCart()
{
// get the shopping cart
ShoppingCartDTO shoppingCart = GetShoppingCart();
// get the list of products
List<ProductDTO> products = productService.GetProducts();
// turn the shopping cart into an order
OrderDTO order = new OrderDTO { CreatedDate = DateTime.Now, Status = Constants.OrderStatus.Pending };
order.OrderItems = new List<OrderItemDTO>();
List<ShoppingCartItemDTO> orderedCart = shoppingCart.ShoppingCartItems.OrderBy(c => c.ProductCode).ToList();
int productItemCount = 0;
string lastProductCode = "";
foreach (ShoppingCartItemDTO cartItem in orderedCart)
{
bool promotionApplied = false;
// validate the product
if (!products.Exists(p => p.Code == cartItem.ProductCode))
{
Console.WriteLine("Product in cart is not valid: " + cartItem.ProductCode);
break;
}
// get the product
ProductDTO product = products.First(p => p.Code == cartItem.ProductCode);
if (product.Code != lastProductCode)
{
productItemCount = 1;
lastProductCode = product.Code;
}
else
productItemCount++;
// set the price (including a discount)
decimal price = GetPrice(product, ref productItemCount, ref promotionApplied, order);
// add the order item
OrderItemDTO orderItem = new OrderItemDTO
{
CreateDate = DateTime.Now,
ProductCode = cartItem.ProductCode,
Price = price,
PromotionApplied = promotionApplied
};
order.OrderItems.Add(orderItem);
}
if (order.OrderItems.Count == 0) return;
// save the order
order.Status = Constants.OrderStatus.Complete;
order = orderService.Save(order);
// print the invoice
DisplayInvoice(order);
}
private void DisplayInvoice(OrderDTO order)
{
List<ProductDTO> products = productService.GetProducts();
Console.WriteLine("".PadRight(30, '-') + "RECEIPT" + "".PadRight(30, '-'));
Console.WriteLine();
Console.WriteLine("Order Number: " + order.Id);
Console.WriteLine("Date: " + order.CreatedDate.ToString());
Console.WriteLine();
Console.WriteLine();
reportHandler.SetupColumns(30, 10, 30);
reportHandler.AddColumns("Product", "Price", "Promotion Applied");
reportHandler.AddColumns('-', "", "", "");
decimal total = 0;
foreach (OrderItemDTO orderItem in order.OrderItems)
{
ProductDTO product = products.First(p => p.Code == orderItem.ProductCode);
reportHandler.AddColumns(product.Description, orderItem.Price.ToString("C"),
(orderItem.PromotionApplied ? "Yes" : "No"));
total += orderItem.Price;
}
reportHandler.AddRow();
reportHandler.AddColumns("Total", total.ToString("C"));
reportHandler.GenerateReport();
}
private decimal GetPrice(ProductDTO product, ref int productItemCount, ref bool promotionApplied, OrderDTO order)
{
// set the price (including a discount)
decimal price = product.Price;
if (product.Promotions.Count > 0)
{
// assume the service only return 1 active promotion
PromotionDTO promotion = product.Promotions.First();
if (promotion.PromotionCode == Constants.PromotionType.Discount)
{
// we reset the productItemCount once the promotion reaches the max apply to count
if (promotion.ApplyTo != null && productItemCount > promotion.Quantity + promotion.ApplyTo)
productItemCount = 1;
// set the price by the percentage discount
if (productItemCount > promotion.Quantity)
{
price = price * promotion.Amount;
promotionApplied = true;
}
}
else if (promotion.PromotionCode == Constants.PromotionType.Price && productItemCount == promotion.Quantity)
{
// for a price by a number of items, we set the price on the final item in the group, and set
// all other items in the group to a price of 0
for (int i = order.OrderItems.Count - 1; i >= order.OrderItems.Count - promotion.Quantity + 1; i--)
{
OrderItemDTO orderItemPriceAdjustment = order.OrderItems.ToList()[i];
orderItemPriceAdjustment.Price = 0;
orderItemPriceAdjustment.PromotionApplied = true;
}
price = promotion.Amount;
productItemCount = 0;
promotionApplied = true;
}
}
return price;
}
