public void ReturnMoney()
{
Money moneyToReturn = MoneyInside.AllocateToReturn(AmountInTransaction);
MoneyInside -= moneyToReturn;
this.AmountInTransaction = 0;
}
public void TakeMoney(decimal amount)
{
if (CanTakeMoney(amount))
{
var moneyToReturn = MoneyInside.AllocateToReturn(amount);
MoneyInside -= moneyToReturn;
MoneyCharged += CalculateCommission(amount);
}
}
public void BuySnack(int position)
{
// Don't allow purchase if not enough money inserted
if (GetSlot(position).SnackPile.Price > this.AmountInTransaction)
{
throw new InvalidOperationException();
}
Slot slot = GetSlot(position);
slot.SnackPile = slot.SnackPile.SubtractOne();
//find the amount of change to return
Money change = MoneyInside.AllocateToReturn(AmountInTransaction - slot.SnackPile.Price);
if (change.Amount < AmountInTransaction - slot.SnackPile.Price)
{
throw new CannotMakeChangeException();
}
MoneyInside -= change;
AmountInTransaction = 0;
}