public void On()
{
try
{
IsStateOn = true;
// verify stock
if (IsAnyStock())
{
// Activate key pad reader
_cancellationTokenSource = new CancellationTokenSource();
_cancellationToken = _cancellationTokenSource.Token;
_readKeypadTask = Task.Run((Action)ReadKeypadInstructions, _cancellationToken);
}
else
{
// signal nothing to sell
OrderAction?.Invoke(OrderCmdEvent.OutOfStock, null);
IsStateOn = false;
}
}
catch (Exception e)
{
FailtException?.Invoke(e);
}
}
public void On()
{
try
{
IsStateOn = true;
_cancellationTokenSource = new CancellationTokenSource();
_cancellationToken = _cancellationTokenSource.Token;
_readKeypadTask = Task.Run((Action)ReadPaymentInstructions, _cancellationToken);
}
catch (Exception e)
{
FailtException?.Invoke(e);
}
}
/// <summary>
/// Communicate with keypad.
/// </summary>
private void ReadKeypadInstructions()
{
try
{
do
{
// verify stock
if (IsAnyStock())
{
DisplayProducts();
}
else
{
// Signal nothing to sell
OrderAction?.Invoke(OrderCmdEvent.OutOfStock, null);
IsStateOn = false;
continue;
}
DisplayMessageByCode(MessageCode.SelectOrder);
char code = _readKeypadInput.ReadInput(_cancellationToken);
// check the product code
if (_productRepository.ProductList.Any((p) => p.Code == code))
{
// valid code
var product = _productRepository.ProductList.First((p) => p.Code == code);
DisplayMessageByCode(MessageCode.Ok);
// select it
OrderAction?.Invoke(OrderCmdEvent.Select, product);
}
else
{
// inform - invalid code
DisplayMessageByCode(MessageCode.InvalidInput);
}
}while (IsStateOn);
}
catch (Exception e)
{
FailtException?.Invoke(e);
}
}
/// <summary>
/// Communicate with payment keypad simulator.
/// </summary>
private void ReadPaymentInstructions()
{
try
{
do
{
string template = _vendingMessageRepository.GetMessage(MessageCode.MakeYourPayment);
if (!string.IsNullOrWhiteSpace(template))
{
string msg = string.Format(template, msgAccepted);
_displayPanel.DisplayMessage(msg);
}
// get the key code
char code = _readKeypadInput.ReadInput(_cancellationToken);
if (code == '#')
{
// cancel simulation key
DisplayMessageByCode(MessageCode.Ok);
CoinAction?.Invoke(PaymentCmdEvent.Cancel, null);
}
else if (MapToCoins.ContainsKey(code))
{
// valid coin code
var coin = MapToCoins[code];
DisplayMessageByCode(MessageCode.Ok);
// signal about payment
CoinAction?.Invoke(PaymentCmdEvent.Payment, coin);
}
else
{
// invalid keypad simulation key
DisplayMessageByCode(MessageCode.InvalidInput);
}
}while (IsStateOn);
}
catch (Exception e)
{
FailtException?.Invoke(e);
}
}
public void InvokeFailtException(Exception ex)
{
FailtException?.Invoke(ex);
}