[LIB-9] Separate chesshog-format module

[chesshog.git] / chesshog-format / src / main / java / org / hedgecode / chess / wiki / WikiParser.java

diff --git a/chesshog-format/src/main/java/org/hedgecode/chess/wiki/WikiParser.java b/chesshog-format/src/main/java/org/hedgecode/chess/wiki/WikiParser.java
new file mode 100644 (file)
index 0000000..93d7ffa
--- /dev/null
+++ b/chesshog-format/src/main/java/org/hedgecode/chess/wiki/WikiParser.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2018. 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.wiki;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.hedgecode.chess.position.ParseException;
+import org.hedgecode.chess.position.Parser;
+import org.hedgecode.chess.position.Position;
+import org.hedgecode.chess.position.Positions;
+import org.hedgecode.chess.position.Square;
+
+/**
+ * Wikipedia chess diagram parser.
+ *
+ * @author Dmitry Samoshin aka gotty
+ */
+public final class WikiParser implements Parser {
+
+    private static final String LINE_REGEX = "\\r?\\n";
+    private static final String SQUARE_REGEX = String.format("[%s]", Wiki.SEPARATOR);
+
+    private static final Pattern PATTERN =
+            Pattern.compile(
+                    String.format("^([%s][^%s]*){%d}$", Wiki.SEPARATOR, Wiki.SEPARATOR, Square.getSize())
+            );
+
+    private static Parser _instance = new WikiParser();
+
+    private WikiParser() {
+    }
+
+    @Override
+    public Position parse(String string) throws ParseException {
+        return _parse(
+                string.split(LINE_REGEX)
+        );
+    }
+
+    private Position _parse(String[] strings) throws ParseException {
+        List<String> lines = new ArrayList<>();
+        for (String line : strings) {
+            Matcher matcher = PATTERN.matcher(line);
+            if (matcher.find()) {
+                lines.add(
+                        matcher.group(0)
+                );
+            }
+        }
+        if (lines.size() != Square.getSize())
+            throw new ParseException("parse.wiki.incorrect.board");
+        Position position = Positions.EMPTY.getPosition();
+        _parsePieces(
+                lines.toArray(
+                        new String[lines.size()]
+                ),
+                position
+        );
+        return position;
+    }
+
+    private void _parsePieces(String[] lines, Position position) throws ParseException {
+        for (int i = 0; i < lines.length; ++i) {
+            int line = lines.length - i;
+            String[] pieces = lines[i].split(SQUARE_REGEX, -1);
+            if (pieces.length != Square.getSize() + 1)
+                throw new ParseException("parse.wiki.incorrect.board");
+            for (int j = 1; j < pieces.length; ++j) {
+                position.setPiece(
+                        Wiki.getColorPiece(pieces[j]),
+                        Square.getSquare(j - 1, line - 1)
+                );
+            }
+        }
+    }
+
+    public static Parser getInstance() {
+        return _instance;
+    }
+
+
+    public static void main(String[] args) throws ParseException {
+        Position position = getInstance().parse(
+                "{{Шахматная диаграмма\n" +
+                        "|\n" +
+                        "|\n" +
+                        "|rd|nd|bd|qd|kd|bd|nd|rd\n" +
+                        "|pd|pd|  |pd|pd|pd|pd|pd\n" +
+                        "|  |  |  |  |  |  |  |\n" +
+                        "|  |  |  |  |  |  |  |\n" +
+                        "|  |  |  |pd|pl|  |  |\r\n" +
+                        "|  |  |pl|  |  |  |  |\n" +
+                        "|pl|pl|  |  |  |pl|pl|pl\n" +
+                        "|rl|nl|bl|ql|kl|bl|nl|rl\n" +
+                        "| }}"
+        );
+        System.out.println(position);
+    }
+
+}