/// <summary>
/// Calculates the the fewest notes and coins to be dispensed.
/// </summary>
/// <param name="highestDenominationInBaseUnit">The largest currency denomination value to include eg. 2000 ie £20</param>
/// <param name="amountToDispense">The amount to dispense expressed in the currencies fractional unit.</param>
/// <returns></returns>
public virtual IEnumerable <MoneyStack> CountMoneyStacksToDispense(int highestDenominationInBaseUnit, int amountToDispense)
{
var cashCollection = new List <MoneyStack>();
if (amountToDispense < highestDenominationInBaseUnit)
{
highestDenominationInBaseUnit = amountToDispense;
}
var moneyVault = Vault.MoneyStacks.Where(x => x.BaseValue <= highestDenominationInBaseUnit).ToList();
foreach (MoneyStack money in moneyVault)
{
int quantity = amountToDispense / money.BaseValue;
quantity = money.Quantity > quantity ? quantity : money.Quantity;
if (quantity == 0)
{
continue;
}
int remainder = amountToDispense % (money.BaseValue * quantity);
MoneyStack cash = Vault.Take(money, quantity);
cashCollection.Add(cash);
amountToDispense -= cash.Total;
if (remainder <= 0)
{
break;
}
}
return(cashCollection);
}
/// <summary> /// This will return a new instance of the money stack and reduce that stack from the stacks of money in the vaults main supply /// </summary> /// <param name="moneyStack"></param> /// <returns>A subset of all of the money stack that was imput.</returns> public abstract MoneyStack Take(MoneyStack moneyStack, int quantity);
