public void Execute(string command)
{
if (string.IsNullOrWhiteSpace(command))
{
return;
}
if (command == "MOVE")
{
_toyRobot.Move();
}
if (command == "LEFT")
{
_toyRobot.Left();
}
if (command == "RIGHT")
{
_toyRobot.Right();
}
if (command == "REPORT")
{
Console.WriteLine(_toyRobot.Report());
}
var match = _placeCommand.Match(command);
if (match.Success)
{
var xIsValid = int.TryParse(match.Groups[1].Value, out var x);
var yIsValid = int.TryParse(match.Groups[2].Value, out var y);
var direction = match.Groups[3].Value;
if (xIsValid && yIsValid)
{
_toyRobot.Place(x, y, direction);
}
}
}
static void Main(string[] args)
{
Console.WriteLine("Welcome to the Toy Robot Simulator");
Console.WriteLine();
Console.WriteLine("The application is a simulation of a toy robot moving on a square tabletop, of dimensions 5 units x 5 units.");
Console.WriteLine("There are no other obstructions on the table surface.");
Console.WriteLine("The origin (0,0) can be considered to be the SOUTH WEST most corner");
Console.WriteLine();
Console.WriteLine("The following commands can be used to interact with the robot:");
Console.WriteLine(" - PLACE X,Y,F => PLACE will put the toy robot on the table in position X,Y and facing NORTH, SOUTH, EAST or WEST");
Console.WriteLine(" - MOVE => MOVE will move the toy robot one unit forward in the direction it is currently facing");
Console.WriteLine(" - LEFT / RIGHT => LEFT and RIGHT will rotate the robot 90 degrees in the specified direction without changing the position of the robot");
Console.WriteLine(" - REPORT => REPORT will announce the X,Y and F of the robot");
Console.WriteLine(" - EXIT => REPORT will exit and close the simulator");
var toyRobot = new ToyRobot();
while (true)
{
var input = Console.ReadLine().ToUpper().Trim();
if (input.Equals("exit", StringComparison.OrdinalIgnoreCase))
{
break;
}
try
{
switch (input)
{
case var someVal when new Regex(@"(PLACE) [0-4],[0-4],(NORTH|SOUTH|EAST|WEST)").IsMatch(someVal):
string parameters = someVal.Replace("PLACE ", string.Empty);
int x = int.Parse(parameters.Substring(0, 1));
int y = int.Parse(parameters.Substring(2, 1));
string facing = parameters.Substring(4);
switch (facing)
{
case "NORTH":
toyRobot.Place(x, y, Facing.North);
break;
case "SOUTH":
toyRobot.Place(x, y, Facing.South);
break;
case "EAST":
toyRobot.Place(x, y, Facing.East);
break;
case "WEST":
toyRobot.Place(x, y, Facing.West);
break;
}
break;
case "MOVE":
toyRobot.Move();
break;
case "LEFT":
toyRobot.Left();
break;
case "RIGHT":
toyRobot.Right();
break;
case "REPORT":
Console.WriteLine(toyRobot.Report());
break;
default:
Console.WriteLine("Not a valid command! Please try again.");
break;
}
}
catch (NoValidPlaceCommandExecutedException)
{
Console.WriteLine("No valid Place command previously executed! Please try again");
}
catch (RobotWillFallException)
{
Console.WriteLine("This move will make the robot fall! Please try again");
}
}
}