public Borrow Borrow(Client client, LibraryItem item, double SalePrice, bool isInSale = false)
{
if (item.Amount <= 0)
{
throw new LibrarySystemException();
}
if (client.IsBorrowing == true)
{
throw new LibrarySystemException();
}
item.Amount--;
client.IsBorrowing = true;
if (isInSale)
{
if (client.Balance - SalePrice <= 0)
{
throw new LibrarySystemException();
}
else
{
client.Balance -= SalePrice;
}
}
else
{
if (client.Balance - item.Price < 0)
{
throw new LibrarySystemException();
}
else
{
client.Balance -= item.Price;
}
}
Borrow borrow = new Borrow(item, DateTime.Now, client.Id);
_totalBorrows.Add(borrow);
return(borrow);
}
public void AddToclientsBorrows(Borrow borrow)
{
ClientsBorrows.Add(borrow);
}
