public void SetStartPosition(Position position)
{
if (!_arena.IsValidPosition(position))
{
throw new ArgumentException("Argument: 'startingPosition' is invalid.");
}
Position = position;
}
private void NorthCommand(bool forward)
{
if (forward)
{
var newPosition = new Position(
Position.XCoordinate,
Position.YCoordinate + 1,
Position.Orientation);
SetPosistionIfValid(newPosition);
}
else
{
Position.Orientation = Orientation.North;
}
}
public bool IsValidPosition(Position position)
{
var isValid = true;
// We take 1 off because it's a zero based grid..
var x = position.XCoordinate;
var y = position.YCoordinate;
var gridWidth = _gridSize.X;
// Caculates the index in the array for the position.
// If out of bounds then the Position is invalid.
if ((gridWidth * x + y) > (_grid.Length - 1) || (gridWidth * x + y) < 0)
{
isValid = false;
}
return isValid;
}
private void SetPosistionIfValid(Position newPosition)
{
if (!_arena.IsValidPosition(newPosition))
{
throw new InvalidOperationException("Move Invalid For Arena Size");
}
Position = newPosition;
}
private void WestCommand(bool forward)
{
if (forward)
{
var newPosition = new Position(
Position.XCoordinate - 1,
Position.YCoordinate,
Orientation.West);
SetPosistionIfValid(newPosition);
}
else
{
Position.Orientation = Orientation.West;
}
}