2 * Copyright (c) 2018-2020. Developed by Hedgecode.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.hedgecode.chess.pgn.token;
19 import java.util.regex.Matcher;
20 import java.util.regex.Pattern;
22 import org.hedgecode.chess.pgn.entity.DetailMove;
23 import org.hedgecode.chess.pgn.entity.Moves;
24 import org.hedgecode.chess.position.ParseException;
29 * @author Dmitry Samoshin aka gotty
31 public class MoveToken implements Token<Moves> {
33 private static final String MOVE_REGEX = "^\\s*(([0-9]+)\\s*(\\.|\\.{3})\\s*)*([PNBRQK]?[a-hx1-8\\-O]+(=[NBRQ])?([+#])?)";
34 private static final Pattern MOVE_PATTERN = Pattern.compile(MOVE_REGEX);
35 private static final int PLY_GROUP = 2, DOT_GROUP = 3, MOVE_GROUP = 4;
36 private static final String DOT_BLACK = "...";
39 public int token(Moves moves, String pgn) throws ParseException {
40 Matcher matcher = MOVE_PATTERN.matcher(pgn);
41 if (!matcher.find()) {
42 throw new ParseException("parse.pgn.incorrect.move", pgn);
44 boolean isBlackMove = isBlackMove(matcher.group(DOT_GROUP));
45 String plyStr = matcher.group(PLY_GROUP);
46 int ply = plyStr != null
47 ? Integer.parseInt(plyStr) * 2 - (isBlackMove ? 0 : 1)
48 : moves.currentMove().ply() + 1;
49 String move = matcher.group(MOVE_GROUP);
51 new DetailMove(ply, move)
54 return matcher.group().length();
57 private boolean isBlackMove(String dotGroup) {
58 return dotGroup == null || dotGroup.equals(DOT_BLACK);