[LIB-9] Separate chesshog-format module

[chesshog.git] / chesshog-format / src / main / java / org / hedgecode / chess / ascii / ASCIIParser.java

diff --git a/chesshog-format/src/main/java/org/hedgecode/chess/ascii/ASCIIParser.java b/chesshog-format/src/main/java/org/hedgecode/chess/ascii/ASCIIParser.java
new file mode 100644 (file)
index 0000000..65fa3e0
--- /dev/null
+++ b/chesshog-format/src/main/java/org/hedgecode/chess/ascii/ASCIIParser.java
@@ -0,0 +1,158 @@
+/*
+ * 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.ascii;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.hedgecode.chess.Builders;
+import org.hedgecode.chess.position.Color;
+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;
+
+/**
+ * ASCII chess diagram parser.
+ *
+ * @author Dmitry Samoshin aka gotty
+ */
+public final class ASCIIParser implements Parser {
+
+    private static final String LINE_REGEX = "\\r?\\n";
+    private static final String BAR_SQUARE_REGEX = String.format("[%s]", ASCII.BAR_REGEX);
+    private static final String DOT_SQUARE_REGEX = String.format("[^%s]+", ASCII.DOT_PIECE_REGEX);
+
+    private static final Pattern BAR_PATTERN =
+            Pattern.compile(
+                    String.format(
+                            "^.*[%s](([^%s]+[%s]){%d}[^%s]+)[%s].*$",
+                            ASCII.EDGE_REGEX, ASCII.BAR_REGEX, ASCII.BAR_REGEX,
+                            Square.getSize() - 1, ASCII.EDGE_REGEX, ASCII.EDGE_REGEX
+                    )
+            );
+
+    private static final Pattern DOT_PATTERN =
+            Pattern.compile(
+                    String.format(
+                            "^.*[%s](([^%s]+[%s]){%d}[^%s]+)[%s].*$",
+                            ASCII.DOT_EDGE, ASCII.DOT_PIECE_REGEX, ASCII.DOT_PIECE_REGEX,
+                            Square.getSize(), ASCII.DOT_PIECE_REGEX, ASCII.DOT_EDGE
+                    )
+            );
+
+    private static Parser _instance = new ASCIIParser();
+
+    private ASCIIParser() {
+    }
+
+    @Override
+    public Position parse(String string) throws ParseException {
+        return _parse(
+                string.split(LINE_REGEX)
+        );
+    }
+
+    private Position _parse(String[] strings) throws ParseException {
+        String[] lines;
+        String squareRegex = BAR_SQUARE_REGEX;
+        lines = _parseLines(strings, BAR_PATTERN);
+        if (lines.length != Square.getSize()) {
+            squareRegex = DOT_SQUARE_REGEX;
+            lines = _parseLines(strings, DOT_PATTERN);
+            if (lines.length != Square.getSize())
+                throw new ParseException("parse.ascii.incorrect.board");
+        }
+        Position position = Positions.EMPTY.getPosition();
+        _parsePieces(
+                lines,
+                position,
+                squareRegex
+        );
+        return position;
+    }
+
+    private String[] _parseLines(String[] strings, Pattern linePattern) {
+        List<String> lines = new ArrayList<>();
+        for (String line : strings) {
+            Matcher matcher = linePattern.matcher(line);
+            if (matcher.find()) {
+                lines.add(
+                        matcher.group(1).trim()
+                );
+            }
+        }
+        return lines.toArray(
+                new String[lines.size()]
+        );
+    }
+
+    private void _parsePieces(String[] lines, Position position, String squareRegex) throws ParseException {
+        for (int i = 0; i < lines.length; ++i) {
+            int line = lines.length - i;
+            String[] pieces = lines[i].split(squareRegex, -1);
+            if (pieces.length != Square.getSize())
+                throw new ParseException("parse.ascii.incorrect.board");
+            for (int j = 0; j < pieces.length; ++j) {
+                position.setPiece(
+                        ASCII.getColorPiece(pieces[j]),
+                        Square.getSquare(j, line - 1)
+                );
+            }
+        }
+    }
+
+    public static Parser getInstance() {
+        return _instance;
+    }
+
+
+    public static void main(String[] args) throws ParseException {
+        ASCII.setType(ASCIIBoardType.DOT);
+        ASCII.setNotation(false);
+
+        // Position position = Positions.INITIAL.getPosition();
+        Position position = Positions.EMPTY.getPosition();
+        position.setKing(Color.WHITE, Square.A1);
+        position.setPawn(Color.WHITE, Square.A2);
+        position.setPawn(Color.WHITE, Square.E4);
+        position.setQueen(Color.WHITE, Square.A7);
+        position.setKing(Color.BLACK, Square.H8);
+        position.setPawn(Color.BLACK, Square.G7);
+        position.setPawn(Color.BLACK, Square.H7);
+        position.setKnight(Color.BLACK, Square.G2);
+        position.setBishop(Color.BLACK, Square.D4);
+        position.setRook(Color.BLACK, Square.E2);
+
+        String ascii = Builders.ASCII.builder().build(position);
+        System.out.println(
+                ascii
+        );
+
+        position = getInstance().parse(ascii);
+
+        ASCII.setType(ASCIIBoardType.HYPHEN);
+        ascii = Builders.ASCII.builder().build(position);
+        System.out.println(
+                ascii
+        );
+    }
+
+}