public void SetCurrentPosition(Func <string> positionFunction)
{
if (positionFunction == null)
{
throw new ArgumentNullException(nameof(positionFunction));
}
var position = positionFunction();
if (string.IsNullOrEmpty(position))
{
throw new ArgumentException("invalid position");
}
CurrentPosition = position;
}
public void Move(Direction dir, Rotatation?rotation)
{
switch (Face)
{
case Facing.North:
if (dir == Direction.Forward)
{
CurrentPosition -= 1;
}
else if (dir == Direction.Backward)
{
CurrentPosition += 1;
}
if (rotation.HasValue)
{
if (rotation == Rotatation.Clockwise)
{
Face = Facing.East;
}
else if (rotation == Rotatation.Anticlockwise)
{
Face = Facing.West;
}
}
break;
case Facing.South:
if (dir == Direction.Forward)
{
CurrentPosition += 1;
}
else if (dir == Direction.Backward)
{
CurrentPosition -= 1;
}
if (rotation == Rotatation.Clockwise)
{
Face = Facing.West;
}
else if (rotation == Rotatation.Anticlockwise)
{
Face = Facing.East;
}
break;
case Facing.East:
if (dir == Direction.Forward)
{
CurrentPosition *= 1;
}
else if (dir == Direction.Backward)
{
CurrentPosition /= 1;
}
if (rotation.HasValue)
{
if (rotation == Rotatation.Clockwise)
{
Face = Facing.South;
}
else if (rotation == Rotatation.Anticlockwise)
{
Face = Facing.North;
}
}
break;
case Facing.West:
if (dir == Direction.Forward)
{
CurrentPosition /= 1;
}
else if (dir == Direction.Backward)
{
CurrentPosition *= 1;
}
if (rotation == Rotatation.Clockwise)
{
Face = Facing.North;
}
else if (rotation == Rotatation.Anticlockwise)
{
Face = Facing.South;
}
break;
default: break;
}
if (
CurrentPosition.Row < 0 ||
CurrentPosition.Column < 0 ||
CurrentPosition.Row >= _currentBoard.Dimension.Rows ||
CurrentPosition.Column >= _currentBoard.Dimension.Columns
)
{
CurrentPosition.SetPosition(-1, -1);
}
}