138 lines
4.3 KiB
JavaScript
138 lines
4.3 KiB
JavaScript
/**
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* PGN Parser - Parses PGN files and extracts game data
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*/
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function parsePGN(pgnText) {
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const games = [];
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// Split by game boundaries - each game starts with [Event
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const gameBlocks = pgnText.split(/\[\s*Event\s*"/);
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for (let i = 1; i < gameBlocks.length; i++) {
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const game = parseGameBlock(gameBlocks[i]);
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if (game) games.push(game);
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}
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return games;
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}
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function parseGameBlock(block) {
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try {
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const headers = {};
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// Der Event-Header fehlt, weil wir danach splitten – extrahiere ihn aus dem Blockanfang
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const eventEnd = block.indexOf('"]');
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if (eventEnd > 1) {
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headers.Event = block.substring(1, eventEnd);
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}
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const headerRegex = /^\s*\[(\w+)\s+"([^"]*)"\]/gm;
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let match;
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// Extract all headers
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let tempBlock = block;
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while ((match = headerRegex.exec(tempBlock)) !== null) {
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headers[match[1]] = match[2];
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}
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// Extract moves - everything after the last header
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const lastHeaderEnd = block.lastIndexOf('"]');
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let movesText = lastHeaderEnd > -1 ? block.substring(lastHeaderEnd + 2).trim() : '';
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// Remove comments from moves for cleaner parsing
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const moves = parseMoves(movesText);
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return {
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event: headers.Event || '',
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site: headers.Site || '',
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date: headers.Date || '',
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round: headers.Round || '',
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white: headers.White || '',
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black: headers.Black || '',
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result: headers.Result || '',
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termination: headers.Termination || '',
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whiteElo: headers.WhiteElo || '',
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blackElo: headers.BlackElo || '',
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whiteClock: headers.WhiteClock || '',
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blackClock: headers.BlackClock || '',
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moves: moves,
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isLive: headers.Termination === 'unterminated' || headers.Result === '*'
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};
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} catch (e) {
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console.error('Error parsing game:', e);
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return null;
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}
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}
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function parseMoves(movesText) {
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const moves = [];
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let clockWhite = null;
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let clockBlack = null;
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let color = 'w';
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const tokenRegex = /\d+\.\s*|\{[^}]*\}|\S+/g;
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const tokens = movesText.match(tokenRegex) || [];
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for (let i = 0; i < tokens.length; i++) {
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let token = tokens[i].trim();
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if (['1-0', '0-1', '1/2-1/2', '*'].includes(token)) {
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moves.push({ san: token, isResult: true, whiteClock: clockWhite, blackClock: clockBlack });
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continue;
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}
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if (/^\d+\.$/.test(token)) continue;
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if (token.startsWith('{')) {
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const clkMatch = token.match(/\[%clk\s+([\d:]+)\]/);
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if (clkMatch && moves.length > 0) {
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const lastMove = moves[moves.length - 1];
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if (!lastMove.isResult && lastMove.color) {
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if (lastMove.color === 'w') {
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clockWhite = clkMatch[1];
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} else {
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clockBlack = clkMatch[1];
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}
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lastMove.whiteClock = clockWhite;
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lastMove.blackClock = clockBlack;
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}
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}
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continue;
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}
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const move = { san: token, isResult: false, whiteClock: clockWhite, blackClock: clockBlack, color };
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moves.push(move);
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color = color === 'w' ? 'b' : 'w';
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}
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return moves;
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}
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function filterLaraGames(games) {
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return games.filter(game =>
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game.white.toLowerCase().includes('kiesewetter') ||
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game.black.toLowerCase().includes('kiesewetter')
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);
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}
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function getLiveGame(laraGames) {
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// Return the game that is still in progress
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return laraGames.find(game => game.isLive) || null;
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}
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function getLatestGame(laraGames) {
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if (laraGames.length === 0) return null;
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// Sort by round number, return the highest round
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const sorted = [...laraGames].sort((a, b) => {
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const roundA = parseInt(a.round) || 0;
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const roundB = parseInt(b.round) || 0;
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return roundB - roundA;
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});
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return sorted[0];
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}
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window.parsePGN = parsePGN;
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window.filterLaraGames = filterLaraGames;
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window.getLiveGame = getLiveGame;
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window.getLatestGame = getLatestGame;
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