public Maybe <CharBoard> MakeAutoLetterSelection(char letter)
{
var maybeOpenCell = CharCells.FirstOrDefault(c => !c.IsSelected && c.Value == letter).ToMaybe();
if (maybeOpenCell.HasValue)
{
var newCell = maybeOpenCell.Value.Select(NextSelectionIndex);
var newCells = CharCells.Select(c => c == maybeOpenCell.Value ? newCell : c);
return(new CharBoard(newCells, PossibleWords, NextSelectionIndex + 1).ToMaybe());
}
return(Maybe.None <CharBoard>());
}
public Maybe <CharCell> GetSelectionAtWordIndex(int index)
{
var selectionIndex = index - 2;
return(CharCells.FirstOrDefault(cs => cs.SelectionIndex.ValueOr(() => - 1) == selectionIndex).ToMaybe());
}