/// <summary>
/// Parses robot command. First expected parameter is first capital letter of cardinal direction, and second
/// is a distance which robot should move. Points should be divided by single space.
/// </summary>
/// <param name="command"></param>
/// <returns></returns>
public static RobotCommand ParseRobotCommand(string command)
{
var splitted = command.Split(' ');
var robotCommand = new RobotCommand();
robotCommand.Distance = Int32.Parse(splitted[1]);
var direction = splitted[0];
switch (direction)
{
case "W":
robotCommand.Direction = Direction.West;
break;
case "E":
robotCommand.Direction = Direction.East;
break;
case "N":
robotCommand.Direction = Direction.North;
break;
case "S":
robotCommand.Direction = Direction.South;
break;
}
return robotCommand;
}
private void Move(RobotCommand command)
{
switch (command.Direction)
{
case 'N':
Position.Y += command.Steps;
break;
case 'E':
Position.X += command.Steps;
break;
case 'S':
Position.Y -= command.Steps;
break;
case 'W':
Position.X -= command.Steps;
break;
}
}
/// <summary>
/// Executes single robot command.
/// </summary>
/// <param name="command">Robot command for execution</param>
public void ExecuteCommand(RobotCommand command)
{
var startLocation = new Location(LastLocation.X, LastLocation.Y);
for (int steps = 1; steps <= command.Distance; steps++)
{
switch (command.Direction)
{
case Direction.West:
CleanLocation(new Location(startLocation.X - steps, startLocation.Y));
break;
case Direction.East:
CleanLocation(new Location(startLocation.X + steps, startLocation.Y));
break;
case Direction.North:
CleanLocation(new Location(startLocation.X, startLocation.Y + steps));
break;
case Direction.South:
CleanLocation(new Location(startLocation.X, startLocation.Y - steps));
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
protected bool Equals(RobotCommand other)
{
return Distance == other.Distance && Direction == other.Direction;
}
