Added empty save methods to PGNDatabase and PGNGame

src/dev/kske/chess/board/Log.java

@@ -109,8 +109,14 @@ public class Log implements Iterable<MoveNode> {
 		} else reset();
 	}
 
+	/**
+	 * @return {@code true} if the root node exists
+	 */
 	public boolean isEmpty() { return root == null; }
 
+	/**
+	 * @return {@code true} if the current node has a parent node
+	 */
 	public boolean hasParent() { return !isEmpty() && current.hasParent(); }
 
 	/**

src/dev/kske/chess/pgn/PGNDatabase.java

@@ -2,6 +2,7 @@ package dev.kske.chess.pgn;
 
 import java.io.File;
 import java.io.FileNotFoundException;
+import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Scanner;
@@ -21,12 +22,16 @@ public class PGNDatabase {
 	private final List<PGNGame> games = new ArrayList<>();
 
 	public void load(File pgnFile) throws FileNotFoundException, ChessException {
-		try (Scanner sc = new Scanner(pgnFile)) {
+		Scanner sc = new Scanner(pgnFile);
 		while (sc.hasNext())
 			games.add(PGNGame.parse(sc));
-		} catch (FileNotFoundException | ChessException e) {
+		sc.close();
-			throw e;
 	}
+
+	public void save(File pgnFile) throws FileNotFoundException {
+		PrintWriter pw = new PrintWriter(pgnFile);
+		games.forEach(g -> g.writePGN(pw));
+		pw.close();
 	}
 
 	public List<PGNGame> getGames() { return games; }

src/dev/kske/chess/pgn/PGNGame.java

@@ -1,5 +1,6 @@
 package dev.kske.chess.pgn;
 
+import java.io.PrintWriter;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Scanner;
@@ -8,6 +9,7 @@ import java.util.regex.Pattern;
 
 import dev.kske.chess.board.Board;
 import dev.kske.chess.board.FENString;
+import dev.kske.chess.board.Piece.Color;
 import dev.kske.chess.exception.ChessException;
 
 /**
@@ -62,6 +64,20 @@ public class PGNGame {
 		return game;
 	}
 
+	public void writePGN(PrintWriter pw) {
+		// Write tag pairs
+		tagPairs.forEach((k, v) -> pw.printf("[%s \"%s\"]%n", k, v));
+
+		// Write movetext
+		board.getLog().forEach(m -> {
+			if (m.activeColor == Color.BLACK) pw.printf("%d. ", m.fullmoveCounter);
+			pw.print(m.move); // TODO: Convert to SAN
+		});
+
+		// TODO: Write game termination marker
+		// TODO: Check if the game has ended
+	}
+
 	public String getTag(String tagName) { return tagPairs.get(tagName); }
 
 	public boolean hasTag(String tagName) { return tagPairs.containsKey(tagName); }