/// <summary>
/// Takes the user input string and attempts to parse it into a <see cref="List{RoverInstructionEnum}"/>.
/// </summary>
/// <param name="userInput"></param>
/// <returns></returns>
public static InputParseResult <List <RoverInstructionEnum> > ParseRoverInstructionsFromUserInput(string userInput)
{
var parseResult = new InputParseResult <List <RoverInstructionEnum> >();
try
{
var instructions = new List <RoverInstructionEnum>();
if (userInput == null)
{
throw new MarsRoverInputParseException("Unable to parse. Input is null.");
}
foreach (var letter in userInput)
{
instructions.Add(letter.ConvertCharInputToInstructionEnum());
}
parseResult.Results = instructions;
parseResult.IsResultParsedSuccessfully = true;
}
catch (MarsRoverInputParseException ex)
{
parseResult.ParsingException = ex;
parseResult.IsResultParsedSuccessfully = false;
parseResult.Results = null;
}
return(parseResult);
}
public static InputParseResult ParseInput(string input)
{
InputParseResult result = new InputParseResult
{
ErrorResult = InputParseError.None,
ParsedInput = int.MaxValue
};
var treatedInput = input.Trim();
int parsedNumber;
bool isNumber = int.TryParse(treatedInput, out parsedNumber);
if (!isNumber)
{
result.ErrorResult = InputParseError.NotANumber;
}
else
{
if (!CheckIfNumberIsInRange(parsedNumber))
{
result.ErrorResult = InputParseError.NumberOutOfRange;
}
else
{
result.ParsedInput = parsedNumber;
}
}
return(result);
}
/// <summary>
/// Takes the user input string and attempts to parse it into a <see cref="NasaMarsRover"/>.
/// </summary>
/// <param name="userInput"></param>
/// <returns></returns>
public static InputParseResult <NasaMarsRover> ParseUserInputToCreateRover(string userInput)
{
var parseResult = new InputParseResult <NasaMarsRover>();
try
{
if (userInput == null)
{
throw new MarsRoverInputParseException("Unable to parse. Input is null.");
}
var inputPieces = userInput.Split(' ');
if (inputPieces.Length != 3)
{
throw new MarsRoverInputParseException(
"Unable to parse. Input is not in the expected format of \"X Y Z\".");
}
//Attempt to parse the input for valid positive integers
if (!int.TryParse(inputPieces[0], out var xCoordinate) ||
!int.TryParse(inputPieces[1], out var yCoordinate) ||
xCoordinate < 0 ||
yCoordinate < 0)
{
throw new MarsRoverInputParseException(
"Unable to parse. Input cannot be parsed into non-negative integers.");
}
if (!char.TryParse(inputPieces[2], out var result))
{
throw new MarsRoverInputParseException(
"Unable to parse. Third character input cannot be parsed into a cardinal direction.");
}
var roverHeading = result.ConvertCharInputToCardinalDirectionEnum();
parseResult.Results = new NasaMarsRover(xCoordinate, yCoordinate, roverHeading);
parseResult.IsResultParsedSuccessfully = true;
}
catch (MarsRoverInputParseException ex)
{
parseResult.ParsingException = ex;
parseResult.IsResultParsedSuccessfully = false;
parseResult.Results = null;
}
return(parseResult);
}
/// <summary>
/// Takes the user input string and attempts to parse it into a <see cref="MarsCoordinate"/>.
/// </summary>
/// <param name="userInput"></param>
/// <returns></returns>
public static InputParseResult <MarsCoordinate> ParsePlateauDimensions(string userInput)
{
var parseResult = new InputParseResult <MarsCoordinate>();
try
{
if (userInput == null)
{
throw new MarsRoverInputParseException("Unable to parse. Input is null.");
}
var inputPieces = userInput.Split(' ');
if (inputPieces.Length != 2)
{
throw new MarsRoverInputParseException(
"Unable to parse. Input is not in the expected format of \"X Y\".");
}
//Attempt to parse the input for valid non-negative integers
if (!int.TryParse(inputPieces[0], out var xCoordinate) ||
!int.TryParse(inputPieces[1], out var yCoordinate) ||
xCoordinate < 0 ||
yCoordinate < 0)
{
throw new MarsRoverInputParseException(
"Unable to parse. Input cannot be parsed into non-negative integers.");
}
parseResult.Results = new MarsCoordinate()
{
X = xCoordinate, Y = yCoordinate
};
parseResult.IsResultParsedSuccessfully = true;
}
catch (MarsRoverInputParseException ex)
{
parseResult.ParsingException = ex;
parseResult.IsResultParsedSuccessfully = false;
parseResult.Results = null;
}
return(parseResult);
}
private int InputLoop(string inputMessage)
{
int validInput = int.MaxValue;
bool wasCorrectInput = false;
while (!wasCorrectInput)
{
Console.WriteLine(inputMessage);
string input = Console.ReadLine();
InputParseResult parseResult = CoordinateInputHelper.ParseInput(input);
if (parseResult.ErrorResult != Enums.InputParseError.None)
{
DisplayErrorMessage(parseResult.ErrorResult, input);
}
else
{
validInput = parseResult.ParsedInput;
wasCorrectInput = true;
}
}
return(validInput);
}
