public bool IsPositionOccupied(IPosition position, int roverId)
{
if (position == null)
{
throw new ArgumentNullException(nameof(position));
}
var trimmedDictionary = RoverPositionDictionary.Where(dict => dict.Key != roverId);
var matches = trimmedDictionary.Where(dict =>
dict.Value.YAxis == position.YAxis && dict.Value.XAxis == position.XAxis);
return(matches.Any());
}
public void BeginMission()
{
Console.WriteLine("Welcome to Mars Rover Mission Control");
while (true)
{
Console.WriteLine("Please provide the Exploration Area maximum X axis value");
var xAxisString = Console.ReadLine()?.Trim();
if (!int.TryParse(xAxisString, out var xAxisInt))
{
Console.WriteLine(
"Invalid character entered, please enter a valid number for the X Axis.");
continue;
}
XAxisMaximum = xAxisInt;
break;
}
while (true)
{
Console.WriteLine("Please provide the Exploration Area maximum Y axis value");
var yAxisString = Console.ReadLine()?.Trim();
if (!int.TryParse(yAxisString, out var yAxisInt))
{
Console.WriteLine(
"Invalid character entered, please enter a valid number for the Y Axis.");
continue;
}
YAxisMaximum = yAxisInt;
break;
}
ExplorationArea = new ExplorationArea(XAxisMaximum, YAxisMaximum);
ExplorationArea.ConstructExplorationArea();
Console.WriteLine("Now please indicate how many Rovers to deploy?");
while (true)
{
var numberOfRovers = Console.ReadLine()?.Trim();
if (!int.TryParse(numberOfRovers, out var numberOfRoversInt))
{
Console.WriteLine(
"Invalid character entered, please enter a valid number of Rovers to be deployed, the maximum is 10 and minimum is 1");
continue;
}
if (numberOfRoversInt <= 0 || numberOfRoversInt >= 10)
{
Console.WriteLine(
"Please enter a valid number of Rovers to be deployed, the maximum is 10 and minimum is 1");
continue;
}
NumberOfRovers = numberOfRoversInt;
break;
}
CreateRovers(NumberOfRovers);
var roverCounter = 0;
foreach (var rover in RoverList)
{
IPosition tempPosition;
while (true)
{
Console.WriteLine(
$"For Rover {roverCounter} please provide starting co-ordinates and cardinal direction facing.");
var roverStartPosition = Console.ReadLine()?.Trim();
if (roverStartPosition == null)
{
Console.WriteLine($"Input Characters cannot be null.");
continue;
}
if (roverStartPosition == string.Empty)
{
Console.WriteLine($"Input Characters cannot be blank.");
continue;
}
if (!roverStartPosition.Contains(' '))
{
Console.WriteLine($"Input Characters must be separated by a space character.");
continue;
}
var roverStartPositionStringArray = roverStartPosition.Split(' ');
if (roverStartPositionStringArray.Length > 3)
{
Console.WriteLine(
$"Too many position values provided. The expected format is '<XAxis> <YAxis> <Cardinal Direction>'");
continue;
}
if (roverStartPositionStringArray.Length > 3)
{
Console.WriteLine(
"Too few values provided. The expected format is '<XAxis> <YAxis> <Cardinal Direction>'");
continue;
}
if (!int.TryParse(roverStartPositionStringArray[0], out var tempXAxis))
{
Console.WriteLine("XAxis Value is not a valid integer");
continue;
}
if (!int.TryParse(roverStartPositionStringArray[1], out var tempYAxis))
{
Console.WriteLine("YAxis Value is not a valid integer");
continue;
}
if (!Enum.TryParse(typeof(Direction), roverStartPositionStringArray[2], false, out var result))
{
Console.WriteLine("Cardinal Direction provided is not valid.");
continue;
}
tempPosition = new Position
{
XAxis = Convert.ToInt32(roverStartPositionStringArray[0]),
YAxis = Convert.ToInt32(roverStartPositionStringArray[1]),
Direction = (Direction)Enum.Parse(typeof(Direction),
roverStartPositionStringArray[2].ToString())
};
if (IsPositionOccupied(tempPosition, rover.Id))
{
Console.WriteLine(
$"Rover {roverCounter} cannot start from here, these coordinates are already taken by another rover.");
continue;
}
break;
}
rover.RoverPosition = tempPosition;
RoverPositionDictionary.Add(rover.Id, tempPosition);
string roverCommand;
while (true)
{
Console.WriteLine($"For Rover {roverCounter} please provide movement instructions");
roverCommand = Console.ReadLine()?.Trim();
if (roverCommand == null)
{
Console.WriteLine($"Command cannot be null.");
continue;
}
if (roverCommand == string.Empty)
{
Console.WriteLine($"Command cannot be empty.");
continue;
}
var roverCommandCharArray = roverCommand.ToCharArray();
var commandValid = true;
foreach (var command in roverCommandCharArray)
{
if (char.IsDigit(command))
{
Console.WriteLine($"Command cannot be a number: {command}");
commandValid = false;
continue;
}
if (!Enum.TryParse(typeof(Command), command.ToString(), false, out var result))
{
Console.WriteLine($"Invalid command character provided: {command}");
commandValid = false;
continue;
}
}
if (!commandValid)
{
continue;
}
break;
}
roverCounter++;
rover.CommandString = roverCommand;
}
Console.WriteLine($"Start rovers moving? (hit any key)");
Console.ReadKey();
var roverToMoveCounter = 0;
foreach (var roverToMove in RoverList)
{
Console.WriteLine($"Rover {roverToMoveCounter} is moving.");
var theoreticalPositionOfWhereRoverMovesTo =
roverToMove.TheoreticalMovementExecution(roverToMove.CommandString);
if (IsPositionOccupied(theoreticalPositionOfWhereRoverMovesTo, roverToMove.Id))
{
Console.WriteLine(
$"Proposed movement would put rover {roverToMoveCounter} into a final position occupied by another rover. Movement aborted.");
continue;
}
roverToMove.ExecuteMovement();
RoverPositionDictionary[roverToMove.Id] = roverToMove.RoverPosition;
Console.WriteLine($"Rover {roverToMoveCounter} final position {roverToMove.ReportPosition()}");
roverToMoveCounter++;
}
Console.WriteLine(ReportFinalPositions());
}
