public int CountSurroundingMines(Coordinates coordinates)
{
var surroundingCoordinates = Enumerable.Range(coordinates.RowIndex - 1, 3)
.SelectMany(rowIndex =>
Enumerable.Range(coordinates.ColumnIndex - 1, 3)
.Select(columnIndex => new Coordinates(columnIndex: columnIndex, rowIndex: rowIndex)));
return surroundingCoordinates
.Count(surroundingCoordinate => !OutOfBounds(surroundingCoordinate) && IsMine(surroundingCoordinate));
}
public Grid InsertMine(Coordinates coordinates)
{
_grid[coordinates.ColumnIndex, coordinates.RowIndex].SetMine();
return new Grid(Width, Height, _grid, _numMines);
}
private bool OutOfBounds(Coordinates coordinates)
{
return coordinates.ColumnIndex < 0 || coordinates.RowIndex < 0 || coordinates.ColumnIndex >= Width || coordinates.RowIndex >= Height;
}
public void RandomiseMines()
{
for (int i = 0; i < _numMines; i++)
{
Random rnd = new Random();
var mineX = rnd.Next(Width - 1);
var mineY = rnd.Next(Height - 1);
var mineCoords = new Coordinates(mineX, mineY);
if (IsMine(mineCoords))
{
i--;
}
InsertMine(mineCoords);
}
}
public bool IsMine(Coordinates coordinates)
{
return _grid[coordinates.ColumnIndex, coordinates.RowIndex].IsMine;
}
public bool IsExplored(Coordinates coordinates)
{
return _grid[coordinates.ColumnIndex, coordinates.RowIndex].Explored;
}