Josh-HeapsandClaude Opus 4.8
b651683e63
- Record moves in standard algebraic notation (GameState.SanHistory), built at
move time in ChessService (captures, disambiguation, castling, promotion,
en passant, and the check/mate suffix)
- Add PgnExporter.ToPgn (seven-tag header + movetext + result) and a
GET /api/chess/{gameId}/pgn endpoint
- Show a Copy PGN button when a game ends on both the play and watch pages,
prefetching the PGN so it works during the post-game cleanup window
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
51 lines
1.4 KiB
C#
51 lines
1.4 KiB
C#
using JoshHeaps.Net.Models;
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using System.Text;
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namespace JoshHeaps.Net.Services.Implementations;
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public static class PgnExporter
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{
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/// <summary>
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/// Render a game as PGN: the standard seven-tag header plus the SAN movetext and result.
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/// </summary>
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public static string ToPgn(this GameState gs)
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{
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var result = ResultTag(gs);
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var name = gs.IsComputerVsComputer ? "Computer" : null;
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var sb = new StringBuilder();
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sb.AppendLine("[Event \"JoshHeaps.Net Chess\"]");
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sb.AppendLine("[Site \"joshheaps.net\"]");
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sb.AppendLine($"[Date \"{DateTime.Now:yyyy.MM.dd}\"]");
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sb.AppendLine($"[White \"{name ?? "White"}\"]");
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sb.AppendLine($"[Black \"{name ?? "Black"}\"]");
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sb.AppendLine($"[Result \"{result}\"]");
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sb.AppendLine();
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for (int i = 0; i < gs.SanHistory.Count; i++)
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{
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if (i % 2 == 0)
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sb.Append(i / 2 + 1).Append(". ");
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sb.Append(gs.SanHistory[i]).Append(' ');
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}
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sb.Append(result);
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return sb.ToString();
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}
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private static string ResultTag(GameState gs)
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{
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if (gs.IsCheckmate)
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return gs.CurrentPlayer == PieceColor.White ? "0-1" : "1-0";
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if (gs.IsStalemate || gs.IsThreefoldRepetition)
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return "1/2-1/2";
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if (gs.IsForfeited)
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return gs.Winner == PieceColor.White ? "1-0" : "0-1";
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return "*";
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}
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}
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