private static int?CreateRover(Commander commander)
{
Console.WriteLine($"Rover {commander.NextRoverId()} Starting Position:");
var position = Console.ReadLine().ToUpper().Split(' ');
if (position.Length < 3)
{
PrintError(@"Position needs to be a space delimited list of two positive numbers and a direction (N, E, S, W)");
return(null);
}
int x, y;
if (int.TryParse(position[0], out x) == false)
{
PrintError("X Coordinate is not valid");
return(null);
}
;
if (int.TryParse(position[1], out y) == false)
{
PrintError("Y Coordinate is not valid");
return(null);
}
;
if (commander.GetMap().IsInBoundary(x, y) == false)
{
PrintError("Position is out of map boundary");
return(null);
}
var direction = DirectionEnumHelper.ToEnum(position[2]);
if (!direction.HasValue)
{
PrintError("Direction is not valid.");
return(null);
}
var roverId = commander.CreateRover(x, y, direction.Value);
if (roverId.HasValue == false)
{
PrintError(commander.GetLastError());
}
return(roverId);
}
public override bool Turn(Turns turn)
{
RoverState currentState = GetCurrentState();
if (currentState == null)
{
return(false);
}
var nextState = RoverState.Clone(currentState);
int directionDelta = 0;
switch (turn)
{
case Turns.Left:
directionDelta = -1;
break;
case Turns.Right:
directionDelta = 1;
break;
}
int currentDirection = DirectionEnumHelper.ToInt(nextState.direction);
int directionLength = DirectionEnumHelper.Count();
int nextDirection = (currentDirection + directionDelta + directionLength) % directionLength;
nextState.direction = DirectionEnumHelper.ToEnum(nextDirection).Value;
if (IsValidState(nextState) == false)
{
return(false);
}
_states.Push(nextState);
return(true);
}
public string Output()
{
return($"{x} {y} {DirectionEnumHelper.ToString(direction)}");
}
