/// <summary>
/// To create the order
/// </summary>
/// <returns>order details</returns>
public async Task <OrderDetails> PlaceOrder()
{
if (BookCart == null || BookCart.BookCartItems.IsEmpty())
{
throw new DataException("Cart is empty");
}
var orderDetails = new OrderDetails()
{
PurchasedBooks = new List <BookCartItem>(),
NotInStockBooks = new List <BookCartItem>()
};
// Get available book list
var availableBooks = await new BookStoreHelper().GetAllBooks();
availableBooks = availableBooks.Where(b => b.InStock > 0).ToList();
// Loop through the cart items which is having quantity greater than '0'
BookCart.BookCartItems.Where(item => item.Quantity > 0).ForEach(item =>
{
// check for the stock
var availableBook = availableBooks.FirstOrDefault(b => b.ID == item.Book.ID && b.InStock > 0);
if (availableBook != null)
{
if (availableBook.InStock < item.Quantity)
{
orderDetails.NotInStockBooks.Add(new BookCartItem {
Book = item.Book, Quantity = item.Quantity - availableBook.InStock
});
item.Quantity = availableBook.InStock;
}
orderDetails.PurchasedBooks.Add(item);
availableBook.UpdateInStock(availableBook.InStock - item.Quantity);
}
else
{
orderDetails.NotInStockBooks.Add(item);
}
});
orderDetails.TotalPrice = (from item in orderDetails.PurchasedBooks
select item.Quantity * item.Book.Price).Sum();
orderDetails.TotalQuantity = (from item in orderDetails.PurchasedBooks
select item.Quantity).Sum();
// clear the cart
BookCart.Clear();
Orders.Add(orderDetails);
return(orderDetails);
}
/// <summary>
/// Default Constructor
/// </summary>
/// <param name="Id">user Id</param>
public Customer(string Id)
{
ID = Id.SafeToUpper().SafeTrim();
BookCart = new BookCart();
Orders = new List <OrderDetails>();
}
