public static RoverMovementCalculatorInput CreateFromInputFormat(string inputFormat)
{
var inputLines = inputFormat
.Split(new[] { Environment.NewLine }, StringSplitOptions.None)
.Select(i => i.Trim()).ToArray();
var upRightCoordinateOfPlateau = Position.CreateFromPositionFormat(inputLines[0]);
var inputLinesWithRoverNumber = inputLines.Skip(1)
.Select((l, i) => new { Line = l, RoverNumber = (int)Math.Floor((double)i / 2) })
.ToArray();
var positions = inputLinesWithRoverNumber.Where((l, i) => i % 2 == 0).ToArray();
var controlCommands = inputLinesWithRoverNumber.Where((l, i) => i % 2 == 1).ToArray();
var roverPositionAndControlSignals = positions
.Join(controlCommands,
x => x.RoverNumber,
y => y.RoverNumber,
(position, commands) =>
{
var roverPosition = RoverPosition.CreateFromPositionFormat(position.Line);
var roverControlSignals =
commands.Line.Select(c => c.RoverControlSignalFromControlLetter()).ToArray();
return(new RoverPositionAndControlSignals(roverPosition, roverControlSignals));
}).ToArray();
return(new RoverMovementCalculatorInput(upRightCoordinateOfPlateau, roverPositionAndControlSignals));
}
public static RoverPosition CreateFromPositionFormat(string format)
{
var paramsAsString = format.Split(' ');
if (paramsAsString.Length != 3) throw new ArgumentException($"Invalid position: {format}");
if (!int.TryParse(paramsAsString[0], out var x)) throw new ArgumentException($"Invalid position: {format}");
if (!int.TryParse(paramsAsString[1], out var y)) throw new ArgumentException($"Invalid position: {format}");
if (string.IsNullOrEmpty(paramsAsString[2])) throw new ArgumentException($"Invalid position: {format}");
var heading = paramsAsString[2].CardinalCompassPointFromShortCode();
var roverPositon = new RoverPosition(x, y, heading);
return roverPositon;
}
public RoverPositionAndControlSignals(RoverPosition roverPosition,
IReadOnlyList <RoverControlSignal> roverControlSignals)
{
RoverPosition = roverPosition;
RoverControlSignals = roverControlSignals;
}
