feat: enhance FenExporter with detailed FEN string generation and refactor PgnExporter for improved game context export

2026-04-21 21:59:06 +02:00
parent c4c245434b
commit 55b4328916
7 changed files with 106 additions and 139 deletions
@@ -1,51 +0,0 @@
-package de.nowchess.api.io
-
-import de.nowchess.api.board.*
-import de.nowchess.api.game.GameContext
-
-object FenExporter extends GameContextExport:
-
-  def boardToFen(board: Board): String =
-    Rank.values.reverse
-      .map(rank => buildRankString(board, rank))
-      .mkString("/")
-
-  def gameContextToFen(context: GameContext): String =
-    val piecePlacement = boardToFen(context.board)
-    val activeColor    = if context.turn == Color.White then "w" else "b"
-    val castling       = castlingString(context.castlingRights)
-    val enPassant      = context.enPassantSquare.map(_.toString).getOrElse("-")
-    val fullMoveNumber = 1 + (context.moves.length / 2)
-    s"$piecePlacement $activeColor $castling $enPassant ${context.halfMoveClock} $fullMoveNumber"
-
-  def exportGameContext(context: GameContext): String = gameContextToFen(context)
-
-  private def buildRankString(board: Board, rank: Rank): String =
-    val rankSquares = File.values.map(file => Square(file, rank))
-    val (result, emptyCount) = rankSquares.foldLeft(("", 0)):
-      case ((acc, empty), square) =>
-        board.pieceAt(square) match
-          case Some(piece) =>
-            val flushed = if empty > 0 then acc + empty.toString else acc
-            (flushed + pieceToFenChar(piece), 0)
-          case None =>
-            (acc, empty + 1)
-    if emptyCount > 0 then result + emptyCount.toString else result
-
-  private def castlingString(rights: CastlingRights): String =
-    val wk     = if rights.whiteKingSide then "K" else ""
-    val wq     = if rights.whiteQueenSide then "Q" else ""
-    val bk     = if rights.blackKingSide then "k" else ""
-    val bq     = if rights.blackQueenSide then "q" else ""
-    val result = s"$wk$wq$bk$bq"
-    if result.isEmpty then "-" else result
-
-  private def pieceToFenChar(piece: Piece): Char =
-    val base = piece.pieceType match
-      case PieceType.Pawn   => 'p'
-      case PieceType.Knight => 'n'
-      case PieceType.Bishop => 'b'
-      case PieceType.Rook   => 'r'
-      case PieceType.Queen  => 'q'
-      case PieceType.King   => 'k'
-    if piece.color == Color.White then base.toUpper else base