public void Buy(Purchase newPurchase, User buyer)
{
using (IDocumentSession session = DocumentStore.OpenSession())
{
Item loadedItem = session.Load<Item>(newPurchase.Item.Id);
loadedItem.Sold += newPurchase.Quantity;
loadedItem.Stock -= newPurchase.Quantity;
User loadedUser = session.Load<User>(buyer.Id);
loadedUser.ItemPurchases.Add(new Purchase
{
ItemId = loadedItem.Id,
Quantity = newPurchase.Quantity,
Timestamp = newPurchase.Timestamp
});
loadedUser.Bill += loadedItem.Price*newPurchase.Quantity;
session.SaveChanges();
}
}
private void AddToBasket(Item item, int multiplier)
{
try
{
var existingPurchase = CheckOutList.First(p => p.Item.Barcode == item.Barcode);
existingPurchase.Quantity += multiplier;
CheckOutList.Remove(existingPurchase);
CheckOutList.Insert(0, existingPurchase);
}
catch
{
Purchase purchase = new Purchase { Item = item, Quantity = multiplier, Timestamp = DateTime.Now };
CheckOutList.Insert(0, purchase);
}
}