private Task ProcessCommand([NotNull] NavigatorCommand command)
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
switch (command)
{
case NavigatorCommand.Pop _:
return(BackInternal());
case NavigatorCommand.PopTo backTo:
return(BackToInternal(backTo));
case NavigatorCommand.Push forward:
return(ForwardScreenInternal(forward));
case NavigatorCommand.Replace replace:
return(ReplaceScreenInternal(replace));
}
Debug.LogWarning($"Unexpected navigator command: {command.GetType().Name}");
return(Task.CompletedTask);
}
static void Main(string[] args)
{
System.Console.WriteLine("Assumindo uma posição original (x,y), a aplicação irá receber vetores de coordenadas na seguinte forma:");
System.Console.WriteLine("[Direção, Intensidade], sendo que Direção pode ser N,S,L,O (Norte, Sul, Leste e Oeste) e intensidade é um inteiro.");
Coordinate coordinate = new Coordinate(1, 1);
CoordinateNavigator navigator = new CoordinateNavigator(coordinate);
CoordinateNavigatorCommandParser parser = new CoordinateNavigatorCommandParser();
while (true)
{
System.Console.WriteLine($"A coordenada atual é {navigator.Coordinate.ToString()}, digite o comando [Direção, Intensidade] na linha abaixo: ");
string command = System.Console.ReadLine();
try
{
NavigatorCommand navigatorCommand = parser.Parse(command);
navigator.Navigate(navigatorCommand);
}
catch (Exception ex)
{
System.Console.WriteLine(ex.Message);
}
}
}
private ICommand EnsureCommand(ECommandId idCommand)
{
NavigatorCommand command = null;
lock (mSyncRoot)
{
command = mCachedCommands[(int)idCommand];
if (command == null)
{
switch (idCommand)
{
case ECommandId.NullRecord:
break;
case ECommandId.NextRecord:
command = new NextItemCommand(mViewDataManipulator);
break;
case ECommandId.PreviousRecord:
command = new PrevItemCommand(mViewDataManipulator);
break;
case ECommandId.FirstRecord:
command = new FirstItemCommand(mViewDataManipulator);
break;
case ECommandId.LastRecord:
command = new LastItemCommand(mViewDataManipulator);
break;
case ECommandId.GoToRecord:
break;
case ECommandId.AddRecord:
command = new AddItemCommand(mViewDataManipulator);
break;
case ECommandId.Save:
command = new SaveItemCommand(mViewDataManipulator);
break;
case ECommandId.DeleteRecord:
command = new DeleteItemCommand(mViewDataManipulator);
break;
default:
throw new ArgumentOutOfRangeException(nameof(idCommand), idCommand, null);
}
if (command != null)
{
mCachedCommands[(int)idCommand] = command;
}
}
}
return(command);
}
