protected void OnImportPGN(object sender, EventArgs e)
{
var fc = new FileChooserDialog("Choose a PGN file to open.",
this,
FileChooserAction.Open,
"Cancel", ResponseType.Cancel,
"Open", ResponseType.Accept);
if (fc.Run() == (int)ResponseType.Accept)
{
MainClass.CurrentGameHistory = GameHistory.importPGN(File.ReadAllText(fc.Filename));
string pgn = MainClass.CurrentGameHistory.ToPGNString();
int indexOfMovesStart = pgn.IndexOf("1.");
if (indexOfMovesStart > 0)
{
GameHistoryView.Buffer.Text = pgn.Substring(indexOfMovesStart);
}
// Load the FEN from the last move
FENParser parser = new FENParser(MainClass.CurrentGameHistory.GetLastMove().FEN);
MainClass.CurrentBoard = parser.GetBoard();
MainClass.CurrentGameStatus = GameStatus.Inactive;
PiecePseudoLegalMoves.GeneratePseudoLegalMoves(MainClass.CurrentBoard);
PieceLegalMoves.GenerateLegalMoves(MainClass.CurrentBoard);
Gtk.Application.Invoke(delegate {
RedrawBoard();
});
MainClass.CurrentGameStatus = GameStatus.Inactive;
GameStatus currentStatus = MainClass.CurrentBoard.CheckForMate();
if (currentStatus != GameStatus.Inactive && currentStatus != GameStatus.Active)
{
Gtk.Application.Invoke(delegate {
ShowGameOverDialog(currentStatus);
});
}
MainClass.ResetClock();
UpdateMaterialDifference(MainClass.CurrentBoard);
}
fc.Destroy();
}
public static GameHistory importPGN(string PGN)
{
GameHistory newGameHistory = new GameHistory();
//Parse tag pairs first
string startingFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1";
while (PGN.Contains("["))
{
string tagPair = PGN.Substring(PGN.IndexOf('[') + 1, PGN.IndexOf(']') - PGN.IndexOf('[') - 1);
PGN = PGN.Substring(PGN.IndexOf(']') + 1);
switch (tagPair.Substring(0, tagPair.IndexOf(' ')))
{
case "Event":
newGameHistory.Event = tagPair.Substring(tagPair.IndexOf('"') + 1).TrimEnd('"');
break;
case "Site":
newGameHistory.Site = tagPair.Substring(tagPair.IndexOf('"') + 1).TrimEnd('"');
break;
case "Date":
newGameHistory.Date = tagPair.Substring(tagPair.IndexOf('"') + 1).TrimEnd('"');
break;
case "Round":
newGameHistory.Round = tagPair.Substring(tagPair.IndexOf('"') + 1).TrimEnd('"');
break;
case "White":
newGameHistory.White = tagPair.Substring(tagPair.IndexOf('"') + 1).TrimEnd('"');
break;
case "Black":
newGameHistory.Black = tagPair.Substring(tagPair.IndexOf('"') + 1).TrimEnd('"');
break;
case "Result":
newGameHistory.Result = tagPair.Substring(tagPair.IndexOf('"') + 1).TrimEnd('"');
break;
case "FEN":
startingFEN = tagPair.Substring(tagPair.IndexOf('"') + 1).TrimEnd('"');
break;
default:
break;
}
}
//Remove comments from PGN
while (PGN.Contains("{"))
{
PGN = PGN.Remove(PGN.IndexOf('{'), PGN.IndexOf('}') - PGN.IndexOf('{') + 1);
}
//Take in moves one by one
FENParser importFEN = new FENParser(startingFEN);
Board gameBoard = importFEN.GetBoard();
PiecePseudoLegalMoves.GeneratePseudoLegalMoves(gameBoard);
PieceLegalMoves.GenerateLegalMoves(gameBoard);
List <Tuple <Move, string> > possibleMoveNotations = getPossibleMoveNotations(gameBoard);
string[] tokens = PGN.Split(null);
for (int i = 0; i < tokens.Length; i++)
{
char[] trimChars = { '!', '?' };
char[] checkChars = { '+', '#' };
string moveNotation = tokens[i].Trim(trimChars);
if (moveNotation.Contains('.'))
{
moveNotation = moveNotation.Substring(moveNotation.IndexOf('.') + 1);
}
if (moveNotation.Length != 0)
{
//Console.WriteLine("***" + moveNotation + "***"); //debugging output
for (int j = 0; j < possibleMoveNotations.Count; j++)
{
//Console.Write(possibleMoveNotations[j].Item2 + " ");
if (moveNotation.Equals(possibleMoveNotations[j].Item2) || moveNotation.Equals(possibleMoveNotations[j].Item2.Trim(checkChars)))
{
gameBoard.MakeMove(possibleMoveNotations[j].Item1.Source, possibleMoveNotations[j].Item1.Destination, possibleMoveNotations[j].Item1.PromoteTo);
newGameHistory.AddMove(possibleMoveNotations[j].Item1, gameBoard.ToFEN().Split(' ')[0]);
possibleMoveNotations = getPossibleMoveNotations(gameBoard);
break;
}
}
//Console.WriteLine(""); //debugging output
}
}
return(newGameHistory);
}