/// <summary>
/// Parses all the commands from the inputLiteral
/// </summary>
/// <param name="inputLiteral">The required command literal</param>
/// <param name="roverDirection">The required direction</param>
/// <param name="roverLocation">The required location</param>
/// <returns>A list of calculated points</returns>
private static List <Point> ParseMovements(string inputLiteral, RoverDirection roverDirection, Point roverLocation)
{
List <Point> pointList = new List <Point>();
Point location = new Point(roverLocation.X, roverLocation.Y);
foreach (char c in inputLiteral.ToCharArray())
{
switch (c)
{
case 'L':
roverDirection = Rotate(Rotation.Left, roverDirection);
break;
case 'R':
roverDirection = Rotate(Rotation.Right, roverDirection);
break;
case 'M':
location = Move(roverDirection, location);
pointList.Add(location);
break;
default:
break;
}
}
return(pointList);
}
/// <summary>
/// Computes a rover roation
/// </summary>
/// <param name="rotation">The required rotation</param>
/// <param name="direction">The required direction</param>
/// <returns>The final RoverDirection calculated</returns>
private static RoverDirection Rotate(Rotation rotation, RoverDirection direction)
{
RoverDirection directionToRet = RoverDirection.North;
switch (direction)
{
case RoverDirection.North:
directionToRet = (rotation == Rotation.Left ? RoverDirection.West : RoverDirection.East);
break;
case RoverDirection.East:
directionToRet = (rotation == Rotation.Left ? RoverDirection.North : RoverDirection.South);
break;
case RoverDirection.South:
directionToRet = (rotation == Rotation.Left ? RoverDirection.East : RoverDirection.West);
break;
case RoverDirection.West:
directionToRet = (rotation == Rotation.Left ? RoverDirection.South : RoverDirection.North);
break;
default:
break;
}
return(directionToRet);
}
/// <summary>
/// Performs a rotation on the rover
/// </summary>
/// <param name="rotation">The required rotation's value</param>
/// <returns>Returns the Rover object for fluent interface operations</returns>
public Rover Rotate(Rotation rotation)
{
switch (this.Direction)
{
case RoverDirection.North:
this.Direction = (rotation == Rotation.Left ? RoverDirection.West : RoverDirection.East);
break;
case RoverDirection.East:
this.Direction = (rotation == Rotation.Left ? RoverDirection.North : RoverDirection.South);
break;
case RoverDirection.South:
this.Direction = (rotation == Rotation.Left ? RoverDirection.East : RoverDirection.West);
break;
case RoverDirection.West:
this.Direction = (rotation == Rotation.Left ? RoverDirection.South : RoverDirection.North);
break;
default:
break;
}
return(this);
}
/// <summary>
/// Computes a rover movement
/// </summary>
/// <param name="direction">The required direction</param>
/// <param name="location">The required location</param>
/// <returns>The new location calculated</returns>
private static Point Move(RoverDirection direction, Point location)
{
Point newPoint = new Point();
switch (direction)
{
case RoverDirection.North:
newPoint = new Point(location.X, location.Y + 1);
break;
case RoverDirection.East:
newPoint = new Point(location.X + 1, location.Y);
break;
case RoverDirection.South:
newPoint = new Point(location.X, location.Y - 1);
break;
case RoverDirection.West:
newPoint = new Point(location.X - 1, location.Y);
break;
default:
break;
}
return(newPoint);
}
public static RoverDirection TurnLeft(RoverDirection roverDirection)
{
RoverDirection currentRoverDirection = roverDirection;
switch (roverDirection)
{
case RoverDirection.N:
currentRoverDirection = RoverDirection.W;
break;
case RoverDirection.E:
currentRoverDirection = RoverDirection.N;
break;
case RoverDirection.S:
currentRoverDirection = RoverDirection.E;
break;
case RoverDirection.W:
currentRoverDirection = RoverDirection.S;
break;
default:
throw new InvalidOperationException();
}
return(currentRoverDirection);
}
/// <summary>
/// Gets the RoverDirection by a char value
/// </summary>
/// <param name="c">The char to parse</param>
/// <returns>The calculated RoverDirection enum value</returns>
public static RoverDirection GetDirectionByChar(char c)
{
RoverDirection directionToReturn = RoverDirection.North;
switch (c)
{
case 'N':
directionToReturn = RoverDirection.North;
break;
case 'E':
directionToReturn = RoverDirection.East;
break;
case 'S':
directionToReturn = RoverDirection.South;
break;
case 'W':
directionToReturn = RoverDirection.West;
break;
default:
break;
}
return(directionToReturn);
}
public void SetPosition(int x, int y, RoverDirection facing)
{
this.x = x;
this.y = y;
this.facing = facing;
CheckIfOutOfBounds();
}
/// <summary>
/// Sets a Rover object on the board
/// </summary>
/// <param name="location">The required location for the Rover</param>
/// <param name="direction">The initial direction of the Rover</param>
/// <returns>The Rover object set on the board</returns>
public Rover SetRoverOnBoard(Point location, RoverDirection direction = RoverDirection.North)
{
RoverBoardSquare square = GetSquareByLocation(location);
square.IsSet = true;
square.Rover = new Rover
{
Direction = direction,
Location = location
};
square.Rover.OnLocationChanged += new EventHandler <RoverLocationEventArgs>(Rover_OnLocationChanged);
return(square.Rover);
}
public static IRoverState GetRoverState(RoverDirection direction)
{
switch (direction)
{
case RoverDirection.North:
return(new RoverStateFacingNorth());
case RoverDirection.East:
return(new RoverStateFacingEast());
case RoverDirection.West:
return(new RoverStateFacingWest());
case RoverDirection.South:
return(new RoverStateFacingSouth());
default:
return(null);
}
}
private void TurnRight()
{
switch (facing)
{
case RoverDirection.North:
facing = RoverDirection.East;
break;
case RoverDirection.South:
facing = RoverDirection.West;
break;
case RoverDirection.East:
facing = RoverDirection.South;
break;
case RoverDirection.West:
facing = RoverDirection.North;
break;
default:
break;
}
}
public string Execute(string input)
{
foreach (var command in input)
{
if (command == 'L' || command == 'R')
{
_direction = Turn(command);
}
if (command == 'M')
{
_coordinate = Move();
if (_obstacleHit)
{
return($"O:{_coordinate.X}:{_coordinate.Y}:{Direction()}");
}
}
}
return($"{_coordinate.X}:{_coordinate.Y}:{Direction()}");
}
public void GeneratePositionAndRightCommand(
int positionX,
int positionY,
RoverDirection roverDirection,
int expectedX,
int expectedY,
RoverDirection expectedRoverDirection)
{
var position = new Position()
{
PositionX = positionX,
PositionY = positionY,
HeadingDirection = roverDirection
};
Commands.Right(position);
Assert.NotNull(position);
Assert.Equal(expectedX, position.PositionX);
Assert.Equal(expectedY, position.PositionY);
Assert.Equal(expectedRoverDirection, position.HeadingDirection);
}
private void RightRotation()
{
switch (this.Direction)
{
case RoverDirection.N:
this.Direction = RoverDirection.E;
break;
case RoverDirection.S:
this.Direction = RoverDirection.W;
break;
case RoverDirection.E:
this.Direction = RoverDirection.S;
break;
case RoverDirection.W:
this.Direction = RoverDirection.N;
break;
default:
break;
}
}
public Position()
{
X = Y = 0;
Direction = RoverDirection.N;
FlowPath = new List <RoverPoints>();
}
public void SetCurrentDirection(RoverDirection newDirection)
{
this.state = RoverStateFactory.GetRoverState(newDirection);
}
public Rover(IPosition roverPosition, RoverDirection roverDirection, IPlateau marsPlateau)
{
RoverPosition = roverPosition;
DirectionOfRover = roverDirection;
MarsPlateau = marsPlateau;
}
public RoverPosition(RoverDirection direction = RoverDirection.N, int x = 0, int y = 0)
{
this.X = x;
this.Y = y;
this.Direction = direction;
}