private bool ExactChangeOnly()
{
var availableProductPrices = DispenserChannels
.Where(i => i.Inventory > 0)
.Select(i => i.Price)
.Distinct();
var acceptedCoinValues = CoinTubes
.Select(i => i.Spec.Value)
.Distinct()
.OrderBy(i => i);
var smallestAcceptedCoinValue = acceptedCoinValues.Min();
var largestAcceptedCoinValue = acceptedCoinValues.Max();
// There is a product that is being sold for a multiple of a
// smaller denomination than the smallest accepted denomination
if (availableProductPrices.Any(i => i % smallestAcceptedCoinValue > 0))
{
return(true);
}
foreach (var price in availableProductPrices)
{
foreach (var coinValue in acceptedCoinValues)
{
if (price % coinValue > 0 && !CanDispenseCoins(price % coinValue))
{
return(true);
}
}
}
return(false);
}
public CoinSpecification IdentifyCoin(double massGrams, double diameterMillimeters)
{
foreach (var coinSpec in CoinTubes.Select(i => i.Spec).Distinct())
{
if (coinSpec.MassGrams == massGrams && coinSpec.DiameterMillimeters == diameterMillimeters)
{
return(coinSpec);
}
}
return(null);
}
