private DawgNode GetDawgNode(string word)
{
if (word.IsNullOrEmpty())
{
return(new DawgNode(word, DawgWithAlphabet.GetAlphabet().ToHashSet()));
}
IEnumerable <string> wordsContainingPrefix = DawgWithAlphabet.GetWordsWithGivenPrefix(prefix: word);
HashSet <char> lettersThatCanFollowPrefix = new();
foreach (string wordContainingPrefix in wordsContainingPrefix)
{
if (!wordContainingPrefix.Equals(word))
{
lettersThatCanFollowPrefix.Add(wordContainingPrefix[word.Length]);
}
}
return(new DawgNode(word, lettersThatCanFollowPrefix));
}
public Dictionary <BoardTile, HashSet <char> > GetCrossChecksForBoardTiles(BoardTileCollection boardTileCollection)
{
BoardWordRetriever boardWordRetriever = new(Board);
char[] charsFromAlphabet = DawgWithAlphabet.GetAlphabet();
HashSet <char> charsFromAlphabetHashSet = charsFromAlphabet.ToHashSet();
Dictionary <BoardTile, HashSet <char> > tilesAndTheirCrossChecks = new();
foreach (BoardTile boardTile in boardTileCollection)
{
if (boardTile.CharTile != null)
{
continue;
}
tilesAndTheirCrossChecks.Add(boardTile, new HashSet <char>());
BoardTileVerticalWordConnectionChecker verticallityChecker = new(Board);
if (!verticallityChecker.BoardTileIsVerticallyPartOfAWord(boardTile.X, boardTile.Y))
{
tilesAndTheirCrossChecks[boardTile] = charsFromAlphabetHashSet;
continue;
}
foreach (char ch in charsFromAlphabet)
{
Board.PlaceCharTile(boardTile.X, boardTile.Y, ch);
VerticalBoardWord verticalWord = boardWordRetriever.GetVerticalWordTilesAtCoordinates(boardTile.X, boardTile.Y);
if (DawgWithAlphabet.IsWordValid(verticalWord.GetWord()))
{
tilesAndTheirCrossChecks[boardTile].Add(ch);
}
Board.RemoveCharTile(boardTile.X, boardTile.Y);
}
}
return(tilesAndTheirCrossChecks);
}