public async Task<PGNMetadata> DeserializeAsync(TextReader reader)
{
var pgn = new PGNMetadata();
string? currentLine = await reader.ReadLineAsync();
while (!string.IsNullOrEmpty(currentLine))
{
// Parse tags
// VERY very rudimentary. A proper parser would account for leading/trailing whitespan on tags, tags spanning multiple lines, multiple tags on a line
if (TryParseTag(currentLine, out var tag))
{
switch(tag.tagName)
{
case WellKnownTags.Date:
pgn.Date = tag.tagValue;
break;
case WellKnownTags.Event:
pgn.Event = tag.tagValue;
break;
case WellKnownTags.Result:
pgn.Result = tag.tagValue;
break;
case WellKnownTags.Round:
pgn.Round = tag.tagValue;
break;
case WellKnownTags.Site:
pgn.Site = tag.tagValue;
break;
case WellKnownTags.White:
pgn.White = tag.tagValue;
break;
case WellKnownTags.Black:
pgn.Black = tag.tagValue;
break;
}
}
currentLine = await reader.ReadLineAsync();
}
// Consume blank lines before moveset
while (currentLine?.Length == 0)
currentLine = await reader.ReadLineAsync();
// Parse movetext
var moves = new List<string>();
bool insideComment = false;
while (!string.IsNullOrEmpty(currentLine))
{
var movesOnLine = ParseLineToMoves(currentLine, ref insideComment);
moves.AddRange(movesOnLine);
currentLine = await reader.ReadLineAsync();
}
pgn.Moves = moves.ToArray();
return pgn;
}
public static PGNMetadata ConvertFromGame(Game game)
{
var pgn = new PGNMetadata();
pgn.Moves = GetMoves(game);
pgn.Result = GetResult(game);
return(pgn);
}
public static Game ConvertToGame(PGNMetadata pgn)
{
var game = new Game();
foreach (var move in pgn.Moves)
{
game.Move(move);
}
return(game);
}
public async Task SerializeAsync(PGNMetadata pgn, TextWriter writer)
{
await writer.WriteLineAsync($"[{WellKnownTags.Event} \"{pgn.Event}\"]");
await writer.WriteLineAsync($"[{WellKnownTags.Site} \"{pgn.Site}\"]");
await writer.WriteLineAsync($"[{WellKnownTags.Date} \"{pgn.Date}\"]");
await writer.WriteLineAsync($"[{WellKnownTags.Round} \"{pgn.Round}\"]");
await writer.WriteLineAsync($"[{WellKnownTags.White} \"{pgn.White}\"]");
await writer.WriteLineAsync($"[{WellKnownTags.Black} \"{pgn.Black}\"]");
await writer.WriteLineAsync($"[{WellKnownTags.Result} \"{pgn.Result}\"]");
await writer.WriteLineAsync();
var linePos = 0;
for (var i = 0; i < pgn.Moves.Length; i++)
{
var moveNumber = string.Empty;
if (i % 2 == 0)
moveNumber = ((i / 2) + 1).ToString() + ". ";
var move = pgn.Moves[i];
var lengthToWrite = move.Length + moveNumber.Length;
if (linePos + lengthToWrite + 1 > LineLength)
{
await writer.WriteLineAsync();
linePos = 0;
}
else if (i != 0)
{
await writer.WriteAsync(' ');
linePos++;
}
await writer.WriteAsync(moveNumber);
await writer.WriteAsync(move);
linePos += lengthToWrite;
}
if (linePos + pgn.Result.Length + 1 > LineLength)
await writer.WriteLineAsync();
else
await writer.WriteAsync(' ');
await writer.WriteAsync(pgn.Result);
}
