/// <summary>
/// Calculates change if there is change, the denomination of the change is then added to the appropriate bills or coins array with the
/// change with the appropriate amount subtracted from the change variable and the appropriate the bill or coin removed from the drawer
/// this will continue the change is 0. Then a StringBuilder builds the string used to the tell amount of change that needs to be given
/// back to the customer. Then another StringBuilder is used to build the reciept using the order number, date and time, the list array of
/// IOrderItem with the according prices and SpecialInstructions, the subtotal, total, the cash paid for the transaction, and the change
/// given back which is then printed by the RecieptPrinter instance. The container is then swapped back to the OrderControl.
/// </summary>
/// <param name="change">Passed in amount of change</param>
private void ChangeCalculator(int change)
{
double Change = change / 100.0;
int[] bills = { 0, 0, 0, 0, 0, 0, 0 };
int[] coins = { 0, 0, 0, 0, 0 };
if (change > 0)
{
while (change > 0)
{
if (change >= 10000 && drawer.GetBillQuantity(Bills.Hundred) > 0)
{
bills[0]++;
change -= 10000;
drawer.RemoveBill(Bills.Hundred, 1);
}
else if (change >= 5000 && drawer.GetBillQuantity(Bills.Fifty) > 0)
{
bills[1]++;
change -= 5000;
drawer.RemoveBill(Bills.Fifty, 1);
}
else if (change >= 2000 && drawer.GetBillQuantity(Bills.Twenty) > 0)
{
bills[2]++;
change -= 2000;
drawer.RemoveBill(Bills.Twenty, 1);
}
else if (change >= 1000 && drawer.GetBillQuantity(Bills.Ten) > 0)
{
bills[3]++;
change -= 1000;
drawer.RemoveBill(Bills.Ten, 1);
}
else if (change >= 500 && drawer.GetBillQuantity(Bills.Five) > 0)
{
bills[4]++;
change -= 500;
drawer.RemoveBill(Bills.Five, 1);
}
else if (change >= 200 && drawer.GetBillQuantity(Bills.Two) > 0)
{
bills[5]++;
change -= 200;
drawer.RemoveBill(Bills.Two, 1);
}
else if (change >= 100 && drawer.GetBillQuantity(Bills.One) > 0)
{
bills[6]++;
change -= 100;
drawer.RemoveBill(Bills.One, 1);
}
else if (change >= 50 && drawer.GetCoinQuantity(Coins.HalfDollar) > 0)
{
coins[0]++;
change -= 50;
drawer.RemoveCoin(Coins.HalfDollar, 1);
}
else if (change >= 25 && drawer.GetCoinQuantity(Coins.Quarter) > 0)
{
coins[1]++;
change -= 25;
drawer.RemoveCoin(Coins.Quarter, 1);
}
else if (change >= 10 && drawer.GetCoinQuantity(Coins.Dime) > 0)
{
coins[2]++;
change -= 10;
drawer.RemoveCoin(Coins.Dime, 1);
}
else if (change >= 5 && drawer.GetCoinQuantity(Coins.Nickel) > 0)
{
coins[3]++;
change -= 5;
drawer.RemoveCoin(Coins.Nickel, 1);
}
else if (change >= 1 && drawer.GetCoinQuantity(Coins.Nickel) > 0)
{
coins[4]++;
change -= 1;
drawer.RemoveCoin(Coins.Penny, 1);
}
}
StringBuilder changeList = new StringBuilder();
changeList.Append("Give customer back:\n");
if (bills[0] > 0)
{
changeList.Append(bills[0].ToString() + " Hundred dollar bill(s)\n");
}
if (bills[1] > 0)
{
changeList.Append(bills[1].ToString() + " Fifty dollar bill\n");
}
if (bills[2] > 0)
{
changeList.Append(bills[2].ToString() + " Twenty dollar bill(s)\n");
}
if (bills[3] > 0)
{
changeList.Append(bills[3].ToString() + " Ten dollar bill\n");
}
if (bills[4] > 0)
{
changeList.Append(bills[4].ToString() + " Five dollar bill\n");
}
if (bills[5] > 0)
{
changeList.Append(bills[5].ToString() + " Two dollar bill(s)\n");
}
if (bills[6] > 0)
{
changeList.Append(bills[6].ToString() + " One dollar bill\n");
}
if (coins[0] > 0)
{
changeList.Append(coins[0].ToString() + " Half-dollar\n");
}
if (coins[1] > 0)
{
changeList.Append(coins[1].ToString() + " Quarter\n");
}
if (coins[2] > 0)
{
changeList.Append(coins[2].ToString() + " Dime(s)\n");
}
if (coins[3] > 0)
{
changeList.Append(coins[3].ToString() + " Nickel\n");
}
if (coins[4] > 0)
{
changeList.Append(coins[4].ToString() + " Penny/Pennies\n");
}
MessageBox.Show(changeList.ToString() + "\n");
}
var printer = new ReceiptPrinter();
var sb = new StringBuilder();
var order = DataContext as Order;
sb.Append("Order " + order.OrderNumber.ToString() + "\n");
sb.Append(DateTime.Today.ToString() + "\n");
foreach (IOrderItem item in list)
{
sb.Append(item.ToString() + "\t\t" + item.Price.ToString("c") + "\n");
if (item.SpecialInstructions != null)
{
foreach (string instruction in item.SpecialInstructions)
{
sb.Append("\t" + instruction + "\n");
}
}
}
sb.Append("\nSubtotal:\t" + order.Subtotal.ToString("c") + "\n");
sb.Append("Total:\t" + TotalLabel.Text + "\n");
sb.Append("Cash\t" + TotalLabel.Text + "\n");
sb.Append("Change\t" + Change.ToString("c"));
printer.Print(sb.ToString());
var screen = new MenuItemSelectionControl();
var orderControl = this.FindAncestor <OrderControl>();
if (orderControl == null)
{
throw new Exception("An ancestor of OrderControl expected be an OrderControl instead of null");
}
orderControl.SwapScreen(screen);
orderControl.DataContext = new Order();
}