Added PGNDatabase and PGNGame classes with support for PGN parsing
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src/dev/kske/chess/pgn/PGNDatabase.java
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src/dev/kske/chess/pgn/PGNDatabase.java
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package dev.kske.chess.pgn;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Scanner;
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import dev.kske.chess.exception.ChessException;
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/**
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* Project: <strong>Chess</strong><br>
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* File: <strong>PGNDatabase.java</strong><br>
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* Created: <strong>4 Oct 2019</strong><br>
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* Author: <strong>Kai S. K. Engelbart</strong>
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*/
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public class PGNDatabase {
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private final List<PGNGame> games = new ArrayList<>();
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public void load(File pgnFile) {
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try (Scanner sc = new Scanner(pgnFile)) {
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while (sc.hasNext())
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games.add(PGNGame.parse(sc));
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} catch (FileNotFoundException | ChessException e) {
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e.printStackTrace();
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}
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}
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}
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src/dev/kske/chess/pgn/PGNGame.java
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src/dev/kske/chess/pgn/PGNGame.java
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package dev.kske.chess.pgn;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Scanner;
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import java.util.regex.MatchResult;
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import java.util.regex.Pattern;
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import dev.kske.chess.board.Board;
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import dev.kske.chess.exception.ChessException;
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/**
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* Project: <strong>Chess</strong><br>
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* File: <strong>PGNGame.java</strong><br>
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* Created: <strong>22 Sep 2019</strong><br>
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* Author: <strong>Kai S. K. Engelbart</strong>
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*/
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public class PGNGame {
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private final Map<String, String> tagPairs = new HashMap<>(7);
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private final Board board = new Board();
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public static PGNGame parse(Scanner sc) throws ChessException {
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PGNGame game = new PGNGame();
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MatchResult matchResult;
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Pattern tagPairPattern = Pattern.compile("\\[(\\w+) \"(.*)\"]"),
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movePattern = Pattern.compile("\\d+\\. (\\S+)\\s(\\S+)"),
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nagPattern = Pattern.compile("(\\$\\d{1,3})*"),
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terminationMarkerPattern = Pattern.compile("1-0|0-1|1\\/2-1\\/2|\\*");
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// Parse tag pairs
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while (true) {
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if (sc.findInLine(tagPairPattern) != null) {
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matchResult = sc.match();
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if (matchResult.groupCount() == 2) game.setTag(matchResult.group(0), matchResult.group(1));
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else break;
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} else break;
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sc.nextLine();
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}
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// Parse movetext
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while (true) {
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// Skip NAG (Numeric Annotation Glyph)
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sc.skip(nagPattern);
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// TODO: Parse RAV (Recursive Annotation Variation)
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sc.findWithinHorizon(movePattern, 20);
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matchResult = sc.match();
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if (matchResult.groupCount() > 0) for (int i = 1; i < matchResult.groupCount() + 1; i++) {
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game.board.move(matchResult.group(i));
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System.out.println(game.board.toFEN());
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}
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else break;
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}
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// Parse game termination marker
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if (sc.hasNext(terminationMarkerPattern)) {
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sc.next(terminationMarkerPattern);
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} else throw new ChessException("Game termination marker expected");
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return game;
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}
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public String getTag(String tagName) {
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return tagPairs.get(tagName);
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}
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public boolean hasTag(String tagName) {
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return tagPairs.containsKey(tagName);
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}
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public void setTag(String tagName, String tagValue) {
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tagPairs.put(tagName, tagValue);
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}
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}
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