/// <summary>
/// Recursively goes through each character in a line and checks whether it is a <see cref="Mine"/> or a
/// <see cref="Safe"/>. If it is a mine call the <see cref="IncrementNeighbours"/> method to increment the
/// BorderingMines of the boxes within a 1 box range. If it is safe instantiate a new safe component.
///
/// The recursion stops once the width value matches the BoardWidth value.
/// </summary>
/// <param name="line">The current line to be parsed</param>
/// <param name="length">The length value of the char to be parsed</param>
/// <param name="width">The width value of the char to be parsed</param>
/// <exception cref="Exception">If a game specification does not match '.' or '*' throw an exception</exception>
private void ParseLine(string line, int length, int width)
{
//Base Case when the width matches the Board Width return
if (width == BoardWidth)
{
return;
}
//Iterative Case parse one character and recurse over method to the next character
var coordinates = new Coordinates {
CoordinateX = length, CoordinateY = width
};
switch (line.ElementAt(width))
{
case Mine:
Box[length, width] = new MinesweeperBox(new Mine(coordinates));
IncrementNeighbours(coordinates, 1);
break;
case Safe:
Box[length, width] = new MinesweeperBox
(new Safe(IncrementComponent(GetComponent(coordinates)), coordinates));
break;
default:
throw new Exception("Incorrect Character Found");
}
ParseLine(line, length, width + 1);
}
/// <summary>
/// This method builds the Board and returns itself as a finished board object.
/// </summary>
/// <param name="boardSettings">The length and width of the board</param>
/// <param name="lines">The game specifications to be parsed</param>
/// <returns>A finished board objected parsed from the given parameters</returns>
public Board CreateBoard(List <int> boardSettings, List <string> lines)
{
//Create the board
Validator.ValidateLength(lines.Count);
BoardLength = boardSettings.ElementAt(0);
BoardWidth = boardSettings.ElementAt(1);
Box = new MinesweeperBox[BoardLength, BoardWidth];
//Fill the board
ParseLines(lines, 0);
//Return the board
return(this);
}
