public void Process(Barcode barcode)
{
}
private void HandleInput(object sender, string barcode)
{
if (IsLocked)
{
// ignore inputs when locked
return;
}
_errorProvider.DoWith(() =>
{
Barcode code = new Barcode(barcode);
switch (code.Type)
{
case Barcode.Types.User:
_currentUser = _connector.GetUser(code.BarCode);
if (_currentUser == null)
{
SwitchToState(States.Welcome);
}
else
{
SwitchToState(States.Shopping);
}
break;
case Barcode.Types.Item:
if (_currentState.State == States.Shopping)
{
var response = _connector.OrderItem(_currentUser.Short, barcode);
_currentUser = response.User;
_currentItem = response.Item;
if (_currentItem != null && _currentUser != null)
{
SwitchToState(States.Finished);
}
else
{
throw new UnknownItemException(barcode);
}
}
else
{
_currentUser = null;
_currentItem = _connector.GetItem(barcode);
SwitchToState(_currentItem != null ? States.PriceInfo : States.Welcome);
}
break;
case Barcode.Types.Command:
barcode = barcode.Trim().ToLowerInvariant();
switch (barcode)
{
case "update":
Application.Exit();
break;
case "stock":
SwitchToState(States.StockItems);
break;
default:
var errorProvider = new ErrorProvider();
errorProvider.SendMail("Unknown command scanned.", "An unknown command has been scanned. THe command was " + barcode);
break;
}
break;
default:
throw new ArgumentOutOfRangeException();
}
}, "Handle input of barcode {0} failed", barcode);
}
