public static ChessGame LoadFromPGN(string pgnText)
{
List <string> tokens = new List <string>();
bool stringToken = false;
bool commentToken = false;
bool escape = false;
string text = "";
foreach (char c in pgnText)
{
if (_selfTerminating.Contains(c) && !stringToken && !commentToken)
{
if (text.Length > 0)
{
tokens.Add(text);
text = "";
}
tokens.Add(c.ToString());
}
else if (c == '\\')
{
escape = true;
}
else if (c == '"')
{
if (!escape)
{
stringToken = !stringToken;
if (!stringToken)
{
tokens.Add("\"" + text + "\"");
text = "";
}
}
else
{
tokens.Add("\"");
escape = false;
}
}
else if (c == '{')
{
commentToken = true;
}
else if (c == '}')
{
commentToken = false;
if (text.Length > 0)
{
tokens.Add("{" + text + "}");
text = "";
}
}
else if (!char.IsWhiteSpace(c) || stringToken || commentToken)
{
if (char.IsWhiteSpace(c))
{
text += " ";
}
else
{
text += c;
}
}
else if (char.IsWhiteSpace(c))
{
if (text.Length > 0)
{
tokens.Add(text);
text = "";
}
}
}
if (text.Length > 0)
{
tokens.Add(text);
text = "";
}
ChessGame game = new ChessGame();
ChessPosition builder = new ChessPosition();
bool tagPair = false;
string name = "";
string value = "";
List <string> moveTokens = new List <string>();
Dictionary <string, ChessResult> results = new Dictionary <string, ChessResult>();
results["1-0"] = ChessResult.WHITE_WINS;
results["0-1"] = ChessResult.BLACK_WINS;
results["1/2-1/2"] = ChessResult.DRAW;
results["*"] = ChessResult.UNAVAILABLE;
foreach (string token in tokens)
{
if (token == "[")
{
tagPair = true;
}
else if (token == "]")
{
tagPair = false;
game.AddTagPair(name, value);
name = "";
value = "";
}
else if (tagPair)
{
if (name.Length < 1)
{
name = token;
}
else
{
value = token;
}
}
else if (results.ContainsKey(token))
{
break;
}
else
{
moveTokens.Add(token);
}
}
game.Moves = ParseTokens(builder, moveTokens);
return(game);
}