internal Order DiscountAndReserve(Guid?userID, Dictionary <Guid, StoreCart> storeCarts, DbAccess.MarketDbContext context)
{
if (storeCarts == null || !storeCarts.Any())
{
Logger.writeEvent("OrderManager: ReserveItems| shopping cart is empty");
throw new OrderNotValidException($"{nameof(DiscountAndReserve)}: shopping cart is null or empty");
}
Guid orderID = Guid.NewGuid();
List <StoreOrder> storeOrders = new List <StoreOrder>();
foreach (KeyValuePair <Guid, StoreCart> storeCart in storeCarts)
{
try
{
Guid storeOrderID = Guid.NewGuid();
IStoreInventoryManager store = StoreHandler.GetStoreInventoryManager(storeCart.Key, context);
StoreHandler.AquireLockOnStore(storeCart.Key);
List <Tuple <Item, int, double> > itemsWithPrices;
try
{
store.IsOrderItemsAmountAvailable(storeCart.Value, context);
itemsWithPrices = store.GetDiscountedPriceAndReserve(storeCart.Value, context);
}
finally
{
StoreHandler.ReleaseLockOnStore(storeCart.Key);
}
List <OrderItem> itemList = new List <OrderItem>();
foreach (Tuple <Item, int, double> itemAmountPrice in itemsWithPrices)
{
OrderItem orderItem = new OrderItem(storeOrderID, itemAmountPrice.Item1, itemAmountPrice.Item2, itemAmountPrice.Item3);
itemList.Add(orderItem);
}
Logger.writeEvent(string.Format("OrderManager: ReserveItems| new Store Order was created for store: {0}", storeCart.Key));
StoreOrder storeOrder = new StoreOrder(storeOrderID, orderID, userID, storeCart.Key,
itemList, PurchaseType.IMMEDIATE, DateTime.Now);
storeOrders.Add(storeOrder);
}
catch (Exception e)
{
foreach (StoreOrder storeOrder in storeOrders)// revert order
{
RevertStoreOrder(storeOrder, context);
}
throw e;
}
}
Order order = new Order(orderID, userID, storeOrders, PurchaseType.IMMEDIATE, DateTime.Now);
context.Orders.Add(order);
context.SaveChanges();
return(order);
}
private void RevertStoreOrder(StoreOrder storeOrder, MarketDbContext context)
{
IStoreInventoryManager store = StoreHandler.GetStoreInventoryManager(storeOrder.StoreId, context);
StoreHandler.AquireLockOnStore(storeOrder.StoreId);
try
{
store.ReturnItemsFromOrder(storeOrder.StoreOrderItems.ToList(), context);
}
finally
{
StoreHandler.ReleaseLockOnStore(storeOrder.StoreId);
}
}
