// Creates ExplorationSector via user-command input
private static ExplorationSector GetExplorationSector()
{
// Prompt user for Eastern and Northern constraints
Console.WriteLine("Enter the eastern and northern grid bounds, separated by a space.");
string explorationGridBoundsInput = Console.ReadLine();
if (explorationGridBoundsInput != null)
{
// Divide Input result into separate strings by space char
string[] explorationGridBoundsArr = explorationGridBoundsInput.Split(' ');
// Validate that number of input entries is correct
if (explorationGridBoundsArr.Length != 2)
{
WriteError("ERROR: Unexpected number of tokens: expected two numbers");
return(null);
}
else
{
// Represents how far east and north a rover can venture
int easternBound = 0;
int northernBound = 0;
// Validate that input entries are integers and output them into the easternBound and northernBound int variables
bool isEasternBoundInteger = int.TryParse(explorationGridBoundsArr[0], out easternBound);
bool isNorthernBoundInteger = int.TryParse(explorationGridBoundsArr[1], out northernBound);
if (!isEasternBoundInteger || !isNorthernBoundInteger)
{
WriteError("ERROR: Non-Integer Input detected!");
return(null);
}
else
{
if (easternBound < 0 || northernBound < 0)
{
WriteError("ERROR: Negative Bound detected, must be positive bound");
return(null);
}
ExplorationSector explorationSector = new ExplorationSector(easternBound, northernBound);
return(explorationSector);
}
}
}
else
{
WriteError("ERROR: Null Input Received!");
return(null);
}
}
// Driver Method
public static void Main(string[] args)
{
// External loop to allow for user-error correction during map creation
while (true)
{
// Will obtain exploration bounds
ExplorationSector explorationSector = GetExplorationSector();
if (explorationSector != null)
{
// Internal loop to allowed for continuous rover control
while (true)
{
RoverCommand(explorationSector);
}
}
}
}
// Method takes user commands to move rover
private static void RoverCommand(ExplorationSector explorationSector)
{
// Prompts User for starting position of a drone
Console.WriteLine("\nEnter Rover Position via X-coord, Y-coord, and cardinal direction symbol, separated by spaces");
string originalPosInput = Console.ReadLine();
// Prompts User for movement instructions
Console.WriteLine("Enter movement instructions (NO SPACES)");
Console.WriteLine("M = Move forward, L = Turn 90 degrees left, R = Turn 90 degrees right");
string movementInstructionsInput = Console.ReadLine();
if (originalPosInput != null && movementInstructionsInput != null)
{
// Validate that movement instructions didn't have any invalid characters in it
if (movementInstructionsInput.Any(letter => !new[] { 'M', 'L', 'R' }.Contains(letter)))
{
WriteError("ERROR: Movement Instructions contained unknown character; Expected M, L, or R");
return;
}
// Divide Input result into separate strings by space char
string[] originalPosArr = originalPosInput.Split(' ');
// Validate that number of input entries is correct
if (originalPosArr.Length != 3)
{
WriteError("ERROR: Unexpected number of tokens: expected two numbers, followed by one cardinal letter");
}
else
{
// Validate that input entries are correct data types, and output them to respective variables
bool isXInteger = int.TryParse(originalPosArr[0], out int x);
bool isYInteger = int.TryParse(originalPosArr[1], out int y);
if (!isXInteger || !isYInteger)
{
WriteError("ERROR: Non-numeric character detected in coordinates");
return;
}
// Validate cardinal direction input is only one character long
if (originalPosArr[2].Length != 1)
{
WriteError("ERROR: Cardinal Direction should only be one character long");
}
else
{
// Validate whether or not the cardinal direction contains N, E, S, or W
if (!new[] { 'N', 'E', 'S', 'W' }.Contains(originalPosArr[2][0]))
{
WriteError("ERROR: Cardinal Direction should only contain either: N, E, S, or W ");
}
else
{
// Sets dir value
char dir = originalPosArr[2][0];
if (!(0 <= x && x <= explorationSector.EasternBound) ||
!(0 <= y && y <= explorationSector.NorthernBound))
{
WriteError("ERROR: X or Y coordinate is out of bounds");
}
else
{
// Creates rover
Rover rover = new Rover(x, y, dir);
// Attempts to execute movement commands
explorationSector.MoveRover(rover, movementInstructionsInput);
}
}
}
}
}
else
{
WriteError("ERROR: Null Input Received!");
}
}
