[LIB-9] Add SAN, NAG, move number and result PGN tokens

[chesshog.git] / chesshog-format / src / main / java / org / hedgecode / chess / pgn / token / MoveNumberToken.java

diff --git a/chesshog-format/src/main/java/org/hedgecode/chess/pgn/token/MoveNumberToken.java b/chesshog-format/src/main/java/org/hedgecode/chess/pgn/token/MoveNumberToken.java
new file mode 100644 (file)
index 0000000..f958ba2
--- /dev/null
+++ b/chesshog-format/src/main/java/org/hedgecode/chess/pgn/token/MoveNumberToken.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2018-2020. Developed by Hedgecode.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.hedgecode.chess.pgn.token;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.hedgecode.chess.ParseException;
+import org.hedgecode.chess.pgn.entity.MoveNumber;
+
+/**
+ * MoveNumberToken
+ *
+ * @author Dmitry Samoshin aka gotty
+ */
+public class MoveNumberToken implements Token<MoveNumber> {
+
+    private static final String MOVE_NUMBER_REGEX = "^\\s*([0-9]+)\\s*([.]{1,3})\\s*";
+    private static final Pattern MOVE_NUMBER_PATTERN = Pattern.compile(MOVE_NUMBER_REGEX);
+    private static final int NUM_GROUP = 1, DOT_GROUP = 2;
+    private static final int BLACK_DOT_LENGTH = 3;
+
+    @Override
+    public int token(MoveNumber moveNumber, String pgn) throws ParseException {
+        Matcher matcher = MOVE_NUMBER_PATTERN.matcher(pgn);
+        if (matcher.find()) {
+            int number = Integer.parseInt(matcher.group(NUM_GROUP));
+            boolean isBlack = matcher.group(DOT_GROUP).length() == BLACK_DOT_LENGTH;
+            moveNumber.assignNumber(
+                    number, isBlack
+            );
+            return matcher.group().length();
+        }
+        return 0;
+    }
+
+}