void UpdateBankedCoins()
{
foreach (var coin in InsertedCoins)
{
BankedCoins.Add(coin);
}
InsertedCoins = new List <Coin>();
}
/// <summary>
/// To buy a product, there needs to be 1 Nickel (0.05) and 1 Dime (0.10) OR 3 Nickels
/// Most that can be expected is $1.00 for Cola, made of 4 Quarters. Customers buying other Products should enter 3 Quarters maximum.
/// </summary>
void HasChangeAvailable()
{
var nickels = BankedCoins.Where(coin => coin.CoinType == CoinType.Nickel).Count();
var dimes = BankedCoins.Where(coin => coin.CoinType == CoinType.Dime).Count();
if (!((dimes > 0 && nickels > 0) || nickels > 2))
{
NoChange = true;
}
}
public void CalculateChangeInCoins(decimal change)
{
var coinsToReturn = new Dictionary <CoinType, int>();
var availableCoins = BankedCoins.GroupBy(coin => coin.CoinType);
var availableDimes = availableCoins.Where(coins => coins.Key == CoinType.Dime).FirstOrDefault() != null?availableCoins.Where(coins => coins.Key == CoinType.Dime).FirstOrDefault().Count() : 0;
var availableNickels = availableCoins.Where(coins => coins.Key == CoinType.Nickel).FirstOrDefault() != null?availableCoins.Where(coins => coins.Key == CoinType.Nickel).FirstOrDefault().Count() : 0;
var dimes = Math.Min(Math.Floor(change / 0.10m), availableDimes);
change -= 0.10m * dimes;
coinsToReturn.Add(CoinType.Dime, (int)dimes);
var nickels = Math.Min(Math.Floor(change / 0.05m), availableNickels);
coinsToReturn.Add(CoinType.Nickel, (int)nickels);
CoinsToDispense = coinsToReturn;
}
