public static void BorrowItem(Item item, Stock stock, User user, int quantity)
{
// item operations
if (stock != null)
{
stock.UpdatedAt = DateTime.Now;
}
stock.EntityState = EntityState.Modified;
// borrowing operations
Borrow borrow = BorrowController.DoesAlreadyEnrolledBySameUser(user.Id, stock.Id);
if (borrow != null)
{
borrow = item.Borrows.First(x => x.Id.Equals(borrow.Id));
stock.Quantity += borrow.Quantity;
borrow.Quantity += quantity;
stock.Quantity -= borrow.Quantity;
borrow.BorrowTime = DateTime.Now;
borrow.ReturnTime = null;
borrow.IsReturn = false;
borrow.EntityState = EntityState.Modified;
}
else
{
borrow = new Borrow()
{
User = user,
User_Id = user.Id,
BorrowTime = DateTime.Now,
IsReturn = false,
Item_Id = item.Id,
Stock_Id = stock.Id,
Quantity = quantity,
EntityState = EntityState.Added
};
stock.Quantity -= borrow.Quantity;
BorrowController.ManageBorrow(borrow, borrow.EntityState);
}
StockController.ManageStock(stock, EntityState.Modified);
ManageItem(item, item.EntityState);
}