private void ExecuteMovementCommands(RoverState roverState, string movementCommands)
{
var moveResult = MoveResult.Ok;
foreach (var command in movementCommands)
{
switch (command)
{
case 'M':
moveResult = MoveForward(roverState);
break;
case 'R':
RotateRight(roverState);
break;
case 'L':
RotateLeft(roverState);
break;
default:
throw new InvalidCommandException();
}
if (moveResult != MoveResult.Ok)
{
roverState.MoveErrors.Add(moveResult);
break;
}
}
}
private void RotateRight(RoverState roverState)
{
switch (roverState.CurrentDirection)
{
case Direction.Undefined:
throw new InitialDirectionNotDefinedException();
case Direction.North:
roverState.CurrentDirection = Direction.East;
break;
case Direction.East:
roverState.CurrentDirection = Direction.South;
break;
case Direction.South:
roverState.CurrentDirection = Direction.West;
break;
case Direction.West:
roverState.CurrentDirection = Direction.North;
break;
default:
throw new ArgumentOutOfRangeException(nameof(roverState.CurrentDirection));
}
}
public RoverState CreateCopy()
{
var roverState = new RoverState();
roverState.CurrentLocation.X = CurrentLocation.X;
roverState.CurrentLocation.Y = CurrentLocation.Y;
roverState.CurrentDirection = CurrentDirection;
roverState.MaxExtent.X = MaxExtent.X;
roverState.MaxExtent.Y = MaxExtent.Y;
return(roverState);
}
private MoveResult MoveForward(RoverState roverState)
{
var moveResult = roverState.ValidateMove();
if (moveResult != MoveResult.Ok)
{
return(moveResult);
}
switch (roverState.CurrentDirection)
{
case Direction.Undefined:
throw new InitialDirectionNotDefinedException();
case Direction.North:
roverState.CurrentLocation.Y++;
break;
case Direction.East:
roverState.CurrentLocation.X++;
break;
case Direction.South:
roverState.CurrentLocation.Y--;
break;
case Direction.West:
roverState.CurrentLocation.X--;
break;
default:
throw new ArgumentOutOfRangeException(nameof(moveResult));
}
return(moveResult);
}
