Add map footer support

src/main/java/net/moonlightflower/wc3libs/bin/app/MapFooter.java

@@ -0,0 +1,213 @@
+package net.moonlightflower.wc3libs.bin.app;
+
+import net.moonlightflower.wc3libs.bin.*;
+import net.moonlightflower.wc3libs.bin.Reader;
+import net.moonlightflower.wc3libs.bin.Writer;
+import net.moonlightflower.wc3libs.misc.Id;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+
+public class MapFooter {
+    public final static Id START_TOKEN = Id.valueOf("NGIS");
+    public final static int DATA_SIZE = 256;
+
+    private byte[] _data;
+
+    public byte[] getData() {
+        return Arrays.copyOf(_data, DATA_SIZE);
+    }
+
+    public void setData(byte[] data) {
+        _data = Arrays.copyOf(data, DATA_SIZE);
+    }
+
+    public static class EncodingFormat extends Format<EncodingFormat.Enum> {
+        public enum Enum {
+            AUTO,
+            MAP_FOOTER_0x0,
+        }
+
+        public final static EncodingFormat AUTO = new EncodingFormat(Enum.AUTO, null);
+        public final static EncodingFormat MAP_FOOTER_0x0 = new EncodingFormat(Enum.MAP_FOOTER_0x0, 0xB);
+
+        @Nullable
+        public static EncodingFormat valueOf(@Nonnull Integer version) {
+            return get(EncodingFormat.class, version);
+        }
+
+        private EncodingFormat(@Nonnull Enum enumVal, @Nullable Integer version) {
+            super(enumVal, version);
+        }
+    }
+
+    public static class Writer extends net.moonlightflower.wc3libs.bin.Writer<EncodingFormat> {
+        @Override
+        public EncodingFormat getAutoFormat() {
+            return EncodingFormat.AUTO;
+        }
+
+        private MapFooter _mapFooter;
+
+        private void write_0x0(@Nonnull Wc3BinOutputStream stream) throws BinStream.StreamException {
+            long startPos = stream.getPos();
+
+            stream.writeId(START_TOKEN);
+
+            byte[] data = Arrays.copyOf(_mapFooter._data, DATA_SIZE);
+
+            stream.writeBytes(data);
+        }
+
+        public void exec(@Nonnull MapFooter mapFooter) throws BinStream.StreamException {
+            _mapFooter = mapFooter;
+
+            switch (getFormat().toEnum()) {
+                case AUTO:
+                case MAP_FOOTER_0x0: {
+                    write_0x0(getStream());
+
+                    break;
+                }
+            }
+        }
+
+        public Writer(@Nonnull Wc3BinOutputStream stream) {
+            super(stream);
+        }
+    }
+
+    public static class Reader extends net.moonlightflower.wc3libs.bin.Reader<EncodingFormat> {
+        public Reader(@Nonnull Wc3BinInputStream stream) {
+            super(stream);
+        }
+
+        @Override
+        public EncodingFormat getAutoFormat() {
+            return EncodingFormat.AUTO;
+        }
+
+        @Nonnull
+        public MapFooter exec() throws IOException {
+            return exec(new MapFooter());
+        }
+
+        private MapFooter _mapFooter;
+
+        private MapFooter exec(@Nonnull MapFooter mapFooter) throws IOException {
+            _mapFooter = mapFooter;
+
+            read(getFormat());
+
+            return _mapFooter;
+        }
+
+        @Nonnull
+        private MapFooter read(@Nonnull EncodingFormat format) throws IOException {
+            switch (format.toEnum()) {
+                case AUTO: {
+                    return read_auto();
+                }
+                case MAP_FOOTER_0x0: {
+                    return read_0x0();
+                }
+                default:
+                    throw new EncodingFormat.InvalidFormatException(format);
+            }
+        }
+
+        @Nonnull
+        private MapFooter read_0x0() throws BinInputStream.StreamException {
+            Wc3BinInputStream stream = getStream();
+
+            Id startToken = stream.readId("startToken");
+
+            if (!startToken.equals(START_TOKEN)) throw new IllegalArgumentException("wrong startToken " + startToken);
+
+            _mapFooter._data = Arrays.copyOf(stream.readBytes(DATA_SIZE), DATA_SIZE);
+
+            return _mapFooter;
+        }
+
+        @Nonnull
+        private MapFooter read_auto() throws IOException {
+            return read_0x0();
+        }
+    }
+
+    public void writeToMapFile(@Nonnull File file) throws IOException {
+        ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
+
+        Wc3BinOutputStream stream = new Wc3BinOutputStream(byteStream);
+
+        Writer writer = new Writer(stream);
+
+        writer.exec(this);
+
+        stream.close();
+
+        byte[] bytes = byteStream.toByteArray();
+
+        RandomAccessFile fp = new RandomAccessFile(file, "r");
+
+        fp.seek(fp.length() - DATA_SIZE - 4);
+
+        byte[] startTokenBytes = new byte[4];
+
+        fp.read(startTokenBytes, 0, startTokenBytes.length);
+
+        fp.close();
+
+        Id startToken = Id.valueOf(new String(startTokenBytes, StandardCharsets.US_ASCII));
+
+        fp = new RandomAccessFile(file, "rw");
+
+        if (startToken.equals(START_TOKEN)) {
+            //start token is existing, assume that footer must be existing, substitute old one
+            fp.seek(fp.length() - DATA_SIZE - 4);
+        } else {
+            fp.seek(fp.length());
+        }
+
+        fp.write(bytes);
+
+        fp.close();
+    }
+
+    public static MapFooter ofMapFile(@Nonnull File file) throws IOException {
+        RandomAccessFile fp = new RandomAccessFile(file, "r");
+
+        fp.seek(fp.length() - DATA_SIZE - 4);
+
+        byte[] bytes = new byte[4 + DATA_SIZE];
+
+        fp.read(bytes);
+
+        fp.close();
+
+        Wc3BinInputStream stream = new Wc3BinInputStream(new ByteArrayInputStream(bytes));
+
+        Reader reader = new Reader(stream);
+
+        MapFooter mapFooter = reader.exec();
+
+        stream.close();
+
+        return mapFooter;
+    }
+
+    public static MapFooter ofFile(@Nonnull File file) throws IOException {
+        Wc3BinInputStream stream = new Wc3BinInputStream(file);
+
+        Reader reader = new Reader(stream);
+
+        MapFooter mapFooter = reader.exec();
+
+        stream.close();
+
+        return mapFooter;
+    }
+}

src/test/java/wc3libs/bin/app/MapFooterTest.java

@@ -0,0 +1,35 @@
+package wc3libs.bin.app;
+
+import net.moonlightflower.wc3libs.bin.Wc3BinInputStream;
+import net.moonlightflower.wc3libs.bin.app.MapFooter;
+import net.moonlightflower.wc3libs.bin.app.MapFooter;
+import net.moonlightflower.wc3libs.bin.app.WPM;
+import net.moonlightflower.wc3libs.port.Orient;
+import org.testng.Assert;
+import org.testng.annotations.Test;
+import wc3libs.misc.Wc3LibTest;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+public class MapFooterTest extends Wc3LibTest {
+	@Test()
+	public void readWriteCycle() throws IOException {
+		File inFile = getFile("wc3data/Map/Forest_Defense_0.18w_sign.w3x");
+
+		MapFooter mapFooter = MapFooter.ofMapFile(inFile);
+
+		File outFile = File.createTempFile("wc3libsTest", "mapFooter");
+
+		Orient.copyFile(inFile, outFile, true);
+
+		mapFooter.writeToMapFile(outFile);
+
+		byte[] inBytes = Files.readAllBytes(inFile.toPath());
+		byte[] outBytes = Files.readAllBytes(outFile.toPath());
+
+		Assert.assertEquals(outBytes, inBytes);
+	}
+}