Merge remote-tracking branch 'origin/master'

# Conflicts:
#	src/main/java/com/keuin/kbackupfabric/operation/backup/PrimitiveBackupMethod.java

10 files changed, 281 insertions, 295 deletions

diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/BackupMethod.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/BackupMethod.java
deleted file mode 100644
index 4e9eb6c..0000000
--- a/src/main/java/com/keuin/kbackupfabric/operation/backup/BackupMethod.java
+++ /dev/null
@@ -1,44 +0,0 @@
-package com.keuin.kbackupfabric.operation.backup;
-
-import com.keuin.kbackupfabric.util.backup.builder.BackupFileNameBuilder;
-import com.keuin.kbackupfabric.util.backup.formatter.BackupFileNameFormatter;
-
-import java.io.IOException;
-
-/**
- * Provide specific backup method, which is implemented statelessly.
- */
-public interface BackupMethod {
-
-    /**
-     * Perform a backup with given method. The backup will be saved as the given name.
-     * Note: real file name depends on the backup type.
-     * @param backupName the backup name.
-     * @return if the backup operation succeed.
-     */
-    BackupResult backup(String backupName, String levelPath, String backupSaveDirectory) throws IOException;
-
-    boolean restore(String backupName, String levelPath, String backupSaveDirectory) throws IOException;
-
-    BackupFileNameBuilder getBackupFileNameBuilder();
-
-    BackupFileNameFormatter getBackupFileNameFormatter();
-
-    class BackupResult {
-        private final boolean success;
-        private final long backupSizeBytes;
-
-        public BackupResult(boolean success, long backupSizeBytes) {
-            this.success = success;
-            this.backupSizeBytes = backupSizeBytes;
-        }
-
-        public boolean isSuccess() {
-            return success;
-        }
-
-        public long getBackupSizeBytes() {
-            return backupSizeBytes;
-        }
-    }
-}
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/IncrementalBackupMethod.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/IncrementalBackupMethod.java
deleted file mode 100644
index 4a87bb3..0000000
--- a/src/main/java/com/keuin/kbackupfabric/operation/backup/IncrementalBackupMethod.java
+++ /dev/null
@@ -1,62 +0,0 @@
-package com.keuin.kbackupfabric.operation.backup;
-
-import com.google.gson.JsonObject;
-import com.keuin.kbackupfabric.util.PrintUtil;
-import com.keuin.kbackupfabric.util.backup.builder.BackupFileNameBuilder;
-import com.keuin.kbackupfabric.util.backup.builder.ObjectTreeBackupFileNameBuilder;
-import com.keuin.kbackupfabric.util.backup.formatter.BackupFileNameFormatter;
-import com.keuin.kbackupfabric.util.backup.formatter.ObjectTreeBackupFileNameFormatter;
-
-import java.io.File;
-import java.io.IOException;
-import java.nio.file.Paths;
-import java.time.LocalDateTime;
-
-public class IncrementalBackupMethod implements BackupMethod {
-
-    private static final IncrementalBackupMethod INSTANCE = new IncrementalBackupMethod();
-
-    public static IncrementalBackupMethod getInstance() {
-        return INSTANCE;
-    }
-
-    @Override
-    public BackupResult backup(String backupName, String levelPath, String backupSaveDirectory) throws IOException {
-        /*
-        1. Analyze the save directory, to get a json containing md5 values of all files.
-        2. Copy new files which we do not have in our backup repository.
-        3. Save the above json as a backup file. When restoring from this,
-           what we have to do is just copy all files back from the repository,
-           based on their md5 digests.
-         */
-
-        boolean success = true;
-        // Generate JSON
-        JsonObject hashJson = IncrementalBackupUtil.generateDirectoryJsonObject(levelPath);
-        // Copy files
-        long newFilesSizeBytes = IncrementalBackupUtil.saveNewFiles(backupSaveDirectory, levelPath, hashJson);
-        if(newFilesSizeBytes < 0) {
-            success = false;
-            PrintUtil.error("Failed to copy new files to object tree.");
-        }
-        // Save JSON tree
-        File jsonFile = new File(String.valueOf(Paths.get(backupSaveDirectory, BackupFileNameBuilder.objectTreeBackup().build(LocalDateTime.now(), backupName))));
-        // TODO
-        return new BackupResult(success, newFilesSizeBytes);
-    }
-
-    @Override
-    public boolean restore(String backupName, String levelPath, String backupSaveDirectory) throws IOException {
-        return false;
-    }
-
-    @Override
-    public BackupFileNameBuilder getBackupFileNameBuilder() {
-        return null;
-    }
-
-    @Override
-    public BackupFileNameFormatter getBackupFileNameFormatter() {
-        return null;
-    }
-}
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/IncrementalBackupUtil.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/IncrementalBackupUtil.java
deleted file mode 100644
index f90aef1..0000000
--- a/src/main/java/com/keuin/kbackupfabric/operation/backup/IncrementalBackupUtil.java
+++ /dev/null
@@ -1,90 +0,0 @@
-package com.keuin.kbackupfabric.operation.backup;
-
-import com.google.gson.JsonElement;
-import com.google.gson.JsonObject;
-import com.keuin.kbackupfabric.util.FilesystemUtil;
-import org.apache.commons.codec.digest.DigestUtils;
-
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStream;
-import java.nio.file.*;
-import java.util.Map;
-
-public class IncrementalBackupUtil {
-    /**
-     * Generate a json object representing a directory and its all sub files and directories.
-     * @param path path to the directory.
-     * @return a json object.
-     */
-    public static JsonObject generateDirectoryJsonObject(String path) throws IOException {
-        JsonObject json = new JsonObject();
-        File directory = new File(path);
-        if (!(directory.isDirectory() && directory.exists()))
-            throw new IOException(String.format("Path %s is not a valid directory.", path));
-
-        // Iterate all sub files using BFS.
-        try (DirectoryStream<Path> directoryStream = Files.newDirectoryStream(Paths.get(path))) {
-            for (Path sub : directoryStream) {
-                if (sub.toFile().isFile()) {
-                    // A sub file
-                    // Just hash and add it as a string
-                    try (InputStream is = Files.newInputStream(sub)) {
-                        String md5 = org.apache.commons.codec.digest.DigestUtils.md5Hex(is);
-                        json.addProperty(sub.getFileName().toString(), md5);
-                    }
-                } else {
-                    // A sub directory
-                    // Search into
-                    json.addProperty(String.valueOf(sub.getFileName()), sub.toString());
-                }
-            }
-        }
-
-        return json;
-    }
-
-    /**
-     * Save new (or modified) files to target path, based on hash json.
-     * @param targetSavePath where we should save new files.
-     * @param sourcePath where new files come from. This path must be the base directory of given hash json.
-     * @param hashJson the json object obtained by calling generateDirectoryJsonObject method.
-     * @return total size of new files. If failed, will return -1.
-     */
-    public static long saveNewFiles(String targetSavePath, String sourcePath, JsonObject hashJson) throws IOException {
-        long bytesCopied = 0;
-        for (Map.Entry<String, JsonElement> entry : hashJson.entrySet()) {
-            String key = entry.getKey();
-            JsonElement value = entry.getValue();
-            if (value.isJsonPrimitive() && value.getAsJsonPrimitive().isString()) {
-                // A sub file
-                // key is file name
-                // value is file md5
-                String md5 = value.getAsJsonPrimitive().getAsString();
-                File saveTarget = new File(targetSavePath, md5);
-                if (!saveTarget.exists()) {
-                    // Target file does not exist. We have to copy this to the target.
-                    File sourceFile = new File(sourcePath, key);
-                    Files.copy(sourceFile.toPath(), saveTarget.toPath(), StandardCopyOption.REPLACE_EXISTING, StandardCopyOption.COPY_ATTRIBUTES);
-                    try {
-                        bytesCopied += sourceFile.length();
-                    } catch (SecurityException ignored) {
-                        // failed to get the file size. Just ignore this.
-                    }
-                }
-            } else if (value.isJsonObject()) {
-                // A sub directory
-                // key is directory name
-                // value is directory json object
-                // Go into
-                if(!value.isJsonObject())
-                    throw new IllegalArgumentException(String.format("Hash json contains illegal argument of a directory item: %s -> %s.", key, value));
-                Path pathSource = Paths.get(sourcePath, key);
-                bytesCopied += saveNewFiles(targetSavePath, pathSource.toString(), value.getAsJsonObject());
-            } else {
-                throw new IllegalArgumentException(String.format("Hash json contains illegal element: %s -> %s.", key, value));
-            }
-        }
-        return bytesCopied;
-    }
-}
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/PrimitiveBackupMethod.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/PrimitiveBackupMethod.java
deleted file mode 100644
index 72e9cdb..0000000
--- a/src/main/java/com/keuin/kbackupfabric/operation/backup/PrimitiveBackupMethod.java
+++ /dev/null
@@ -1,99 +0,0 @@
-package com.keuin.kbackupfabric.operation.backup;
-
-import com.keuin.kbackupfabric.exception.ZipUtilException;
-import com.keuin.kbackupfabric.metadata.BackupMetadata;
-import com.keuin.kbackupfabric.util.FilesystemUtil;
-import com.keuin.kbackupfabric.util.PrintUtil;
-import com.keuin.kbackupfabric.util.ZipUtil;
-import com.keuin.kbackupfabric.util.backup.builder.BackupFileNameBuilder;
-import com.keuin.kbackupfabric.util.backup.formatter.BackupFileNameFormatter;
-
-import java.io.File;
-import java.io.IOException;
-import java.nio.file.Paths;
-import java.time.LocalDateTime;
-
-import static org.apache.commons.io.FileUtils.forceDelete;
-
-public class PrimitiveBackupMethod implements BackupMethod {
-
-    private static final PrimitiveBackupMethod INSTANCE = new PrimitiveBackupMethod();
-    private static int zipLevel = 9;
-
-    public static PrimitiveBackupMethod getInstance() {
-        return INSTANCE;
-    }
-
-    @Override
-    public BackupResult backup(String backupName, String levelPath, String backupSaveDirectory) throws IOException {
-        String backupFileName = BackupFileNameBuilder.primitiveZipBackup().build(LocalDateTime.now(),backupName);
-        try {
-            BackupMetadata backupMetadata = new BackupMetadata(System.currentTimeMillis(), backupName);
-
-            PrintUtil.info(String.format("zip(srcPath=%s, destPath=%s)", levelPath, backupSaveDirectory));
-            PrintUtil.info("Compressing level ...");
-            ZipUtil.makeBackupZip(levelPath, backupSaveDirectory, backupFileName, backupMetadata, zipLevel);
-
-        } catch (ZipUtilException exception) {
-            PrintUtil.info("Infinite recursive of directory tree detected, backup was aborted.");
-            return new BackupResult(false, 0);
-        }
-
-        // Get backup file size and return
-        return new BackupResult(true, FilesystemUtil.getFileSizeBytes(backupSaveDirectory, backupFileName));
-    }
-
-    @Override
-    public boolean restore(String backupName, String levelDirectory, String backupSaveDirectory) throws IOException {
-        // Delete old level
-        PrintUtil.info("Server stopped. Deleting old level ...");
-        File levelDirFile = new File(levelDirectory);
-        long startTime = System.currentTimeMillis();
-
-        int failedCounter = 0;
-        final int MAX_RETRY_TIMES = 20;
-        while (failedCounter < MAX_RETRY_TIMES) {
-            System.gc();
-            if (!levelDirFile.delete() && levelDirFile.exists()) {
-                System.gc();
-                forceDelete(levelDirFile); // Try to force delete.
-            }
-            if (!levelDirFile.exists())
-                break;
-            ++failedCounter;
-            try {
-                Thread.sleep(500);
-            } catch (InterruptedException ignored) {
-            }
-        }
-        if (levelDirFile.exists()) {
-            PrintUtil.error(String.format("Cannot restore: failed to delete old level %s .", levelDirFile.getName()));
-            return false;
-        }
-
-        // TODO: Refactor this to the concrete BackupMethod.
-        // Decompress archive
-        PrintUtil.info("Decompressing archived level ...");
-        ZipUtil.unzip(Paths.get(backupSaveDirectory, backupName).toString(), levelDirectory, false);
-        long endTime = System.currentTimeMillis();
-        PrintUtil.info(String.format("Restore complete! (%.2fs) Please restart the server manually.", (endTime - startTime) / 1000.0));
-        PrintUtil.info("If you want to restart automatically after restoring, please visit the project manual at: https://github.com/keuin/KBackup-Fabric/blob/master/README.md");
-
-//        try {
-//            Thread.sleep(1000);
-//        } catch (InterruptedException ignored) {
-//        }
-
-        return true;
-    }
-
-    @Override
-    public BackupFileNameBuilder getBackupFileNameBuilder() {
-        return BackupFileNameBuilder.primitiveZipBackup();
-    }
-
-    @Override
-    public BackupFileNameFormatter getBackupFileNameFormatter() {
-        return BackupFileNameFormatter.primitiveZipBackup();
-    }
-}
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/BackupFeedback.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/BackupFeedback.java
new file mode 100644
index 0000000..0fe0766
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/BackupFeedback.java
@@ -0,0 +1,6 @@
+package com.keuin.kbackupfabric.operation.backup.feedback;
+
+public interface BackupFeedback {
+    String getFeedback();
+    boolean isSuccess();
+}
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/IncrementalBackupFeedback.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/IncrementalBackupFeedback.java
new file mode 100644
index 0000000..f39fde6
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/IncrementalBackupFeedback.java
@@ -0,0 +1,28 @@
+package com.keuin.kbackupfabric.operation.backup.feedback;
+
+public class IncrementalBackupFeedback implements BackupFeedback {
+    private final boolean success;
+    private final int newFilesAdded;
+
+    public IncrementalBackupFeedback(boolean success, int newFilesAdded) {
+        this.success = success;
+        this.newFilesAdded = newFilesAdded;
+    }
+
+    @Override
+    public boolean isSuccess() {
+        return success;
+    }
+
+    public long getNewFilesAdded() {
+        return newFilesAdded;
+    }
+
+    @Override
+    public String getFeedback() {
+        if (success && newFilesAdded >= 0)
+            return String.format("File(s) added: %d.", newFilesAdded);
+        else
+            return "";
+    }
+}
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/PrimitiveBackupFeedback.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/PrimitiveBackupFeedback.java
new file mode 100644
index 0000000..3bcd012
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/operation/backup/feedback/PrimitiveBackupFeedback.java
@@ -0,0 +1,30 @@
+package com.keuin.kbackupfabric.operation.backup.feedback;
+
+import static com.keuin.kbackupfabric.util.backup.BackupFilesystemUtil.getFriendlyFileSizeString;
+
+public class PrimitiveBackupFeedback implements BackupFeedback {
+    private final boolean success;
+    private final long backupSizeBytes;
+
+    public PrimitiveBackupFeedback(boolean success, long backupSizeBytes) {
+        this.success = success;
+        this.backupSizeBytes = backupSizeBytes;
+    }
+
+    @Override
+    public boolean isSuccess() {
+        return success;
+    }
+
+    public long getBackupSizeBytes() {
+        return backupSizeBytes;
+    }
+
+    @Override
+    public String getFeedback() {
+        if (success && backupSizeBytes >= 0)
+            return String.format("File size: %s.", getFriendlyFileSizeString(backupSizeBytes));
+        else
+            return "";
+    }
+}
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredBackupMethod.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredBackupMethod.java
new file mode 100644
index 0000000..bb80c80
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredBackupMethod.java
@@ -0,0 +1,37 @@
+package com.keuin.kbackupfabric.operation.backup.method;
+
+import com.keuin.kbackupfabric.operation.backup.feedback.BackupFeedback;
+
+import java.io.IOException;
+
+/**
+ * Provide specific backup method, which has been configured with proper settings,
+ * such as saving directory and level path.
+ */
+public interface ConfiguredBackupMethod {
+
+    /**
+     * Perform a backup with given method. The backup will be saved as the given name.
+     * Note: real file name depends on the backup type.
+     *
+     * @return backup result.
+     */
+    BackupFeedback backup() throws IOException;
+
+    boolean restore() throws IOException;
+
+    /**
+     * Create backup save directory and do some essential initialization before the backup process.
+     *
+     * @return false if failed, then the backup process won't proceed.
+     */
+    boolean touch();
+
+    /**
+     * Get the used backup file name.
+     *
+     * @return the file name.
+     */
+    String getBackupFileName();
+
+}
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredIncrementalBackupMethod.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredIncrementalBackupMethod.java
new file mode 100644
index 0000000..b5d2463
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredIncrementalBackupMethod.java
@@ -0,0 +1,92 @@
+package com.keuin.kbackupfabric.operation.backup.method;
+
+import com.keuin.kbackupfabric.operation.backup.feedback.IncrementalBackupFeedback;
+import com.keuin.kbackupfabric.util.FilesystemUtil;
+import com.keuin.kbackupfabric.util.PrintUtil;
+import com.keuin.kbackupfabric.util.backup.incremental.ObjectCollection;
+import com.keuin.kbackupfabric.util.backup.incremental.ObjectCollectionFactory;
+import com.keuin.kbackupfabric.util.backup.incremental.ObjectCollectionSerializer;
+import com.keuin.kbackupfabric.util.backup.incremental.identifier.Sha256Identifier;
+import com.keuin.kbackupfabric.util.backup.incremental.manager.IncrementalBackupStorageManager;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.HashSet;
+
+public class ConfiguredIncrementalBackupMethod implements ConfiguredBackupMethod {
+
+    private final String backupIndexFileName;
+    private final String levelPath;
+    private final String backupIndexFileSaveDirectory;
+    private final String backupBaseDirectory;
+
+    public ConfiguredIncrementalBackupMethod(String backupIndexFileName, String levelPath, String backupIndexFileSaveDirectory, String backupBaseDirectory) {
+        this.backupIndexFileName = backupIndexFileName;
+        this.levelPath = levelPath;
+        this.backupIndexFileSaveDirectory = backupIndexFileSaveDirectory;
+        this.backupBaseDirectory = backupBaseDirectory;
+    }
+
+    @Override
+    public IncrementalBackupFeedback backup() throws IOException {
+        File levelPathFile = new File(levelPath);
+
+        // construct incremental backup index
+        PrintUtil.info("Hashing files...");
+        ObjectCollection collection = new ObjectCollectionFactory<>(Sha256Identifier.getFactory())
+                .fromDirectory(levelPathFile, new HashSet<>(Arrays.asList("session.lock", "kbackup_metadata")));
+
+        // update storage
+        PrintUtil.info("Copying files...");
+        IncrementalBackupStorageManager storageManager = new IncrementalBackupStorageManager(Paths.get(backupBaseDirectory));
+        int filesAdded = storageManager.addObjectCollection(collection, levelPathFile);
+
+        // save index file
+        PrintUtil.info("Saving index file...");
+        ObjectCollectionSerializer.toFile(collection, new File(backupIndexFileSaveDirectory, backupIndexFileName));
+
+        // return result
+        PrintUtil.info("Incremental backup finished.");
+        return new IncrementalBackupFeedback(filesAdded >= 0, filesAdded);
+    }
+
+    @Override
+    public boolean restore() throws IOException {
+        // load collection
+        PrintUtil.info("Loading file list...");
+        ObjectCollection collection = ObjectCollectionSerializer.fromFile(
+                new File(backupIndexFileSaveDirectory, backupIndexFileName)
+        );
+
+        // delete old level
+        File levelPathFile = new File(levelPath);
+        PrintUtil.info("Deleting old level...");
+        if (!FilesystemUtil.forceDeleteDirectory(levelPathFile)) {
+            PrintUtil.info("Failed to delete old level!");
+            return false;
+        }
+
+        // restore file
+        PrintUtil.info("Copying files...");
+        IncrementalBackupStorageManager storageManager = new IncrementalBackupStorageManager(Paths.get(backupBaseDirectory));
+        int restoreObjectCount = storageManager.restoreObjectCollection(collection, levelPathFile);
+
+        PrintUtil.info(String.format("%d file(s) restored.", restoreObjectCount));
+        return true;
+    }
+
+    @Override
+    public boolean touch() {
+        File baseDirectoryFile = new File(backupBaseDirectory);
+        return baseDirectoryFile.isDirectory() || baseDirectoryFile.mkdir();
+    }
+
+    @Override
+    public String getBackupFileName() {
+        return backupIndexFileName;
+    }
+
+
+}
diff --git a/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredPrimitiveBackupMethod.java b/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredPrimitiveBackupMethod.java
new file mode 100644
index 0000000..1c3c9f6
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredPrimitiveBackupMethod.java
@@ -0,0 +1,88 @@
+package com.keuin.kbackupfabric.operation.backup.method;
+
+import com.keuin.kbackupfabric.exception.ZipUtilException;
+import com.keuin.kbackupfabric.metadata.BackupMetadata;
+import com.keuin.kbackupfabric.operation.backup.feedback.PrimitiveBackupFeedback;
+import com.keuin.kbackupfabric.util.FilesystemUtil;
+import com.keuin.kbackupfabric.util.PrintUtil;
+import com.keuin.kbackupfabric.util.ZipUtil;
+import com.keuin.kbackupfabric.util.backup.BackupFilesystemUtil;
+import com.keuin.kbackupfabric.util.backup.BackupNameTimeFormatter;
+import com.keuin.kbackupfabric.util.backup.name.PrimitiveBackupFileNameEncoder;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Paths;
+import java.time.LocalDateTime;
+
+public class ConfiguredPrimitiveBackupMethod implements ConfiguredBackupMethod {
+
+    private final String backupFileName;
+    private final String levelPath;
+    private final String backupSavePath;
+
+    public ConfiguredPrimitiveBackupMethod(String backupFileName, String levelPath, String backupSavePath) {
+        this.backupFileName = backupFileName;
+        this.levelPath = levelPath;
+        this.backupSavePath = backupSavePath;
+    }
+
+    @Deprecated
+    private String getBackupFileName(LocalDateTime time, String backupName) {
+        String timeString = BackupNameTimeFormatter.localDateTimeToString(time);
+        return String.format("%s%s_%s%s", BackupFilesystemUtil.getBackupFileNamePrefix(), timeString, backupName, ".zip");
+    }
+
+    @Override
+    public PrimitiveBackupFeedback backup() throws IOException {
+        try {
+            String customBackupName = new PrimitiveBackupFileNameEncoder().decode(backupFileName).customName;
+            BackupMetadata backupMetadata = new BackupMetadata(System.currentTimeMillis(), customBackupName);
+            PrintUtil.info(String.format("zip(srcPath=%s, destPath=%s)", levelPath, backupSavePath));
+            PrintUtil.info("Compressing level ...");
+            ZipUtil.makeBackupZip(levelPath, backupSavePath, backupFileName, backupMetadata);
+        } catch (ZipUtilException exception) {
+            PrintUtil.info("Infinite recursive of directory tree detected, backup was aborted.");
+            return new PrimitiveBackupFeedback(false, 0);
+        }
+
+        // Get backup file size and return
+        return new PrimitiveBackupFeedback(true, FilesystemUtil.getFileSizeBytes(backupSavePath, backupFileName));
+    }
+
+    @Override
+    public boolean restore() throws IOException {
+        // Delete old level
+        PrintUtil.info("Server stopped. Deleting old level ...");
+        if (!FilesystemUtil.forceDeleteDirectory(new File(levelPath))) {
+            PrintUtil.info("Failed to delete old level!");
+            return false;
+        }
+
+
+        // TODO: Refactor this to the concrete BackupMethod.
+        // Decompress archive
+        PrintUtil.info("Decompressing archived level ...");
+        ZipUtil.unzip(Paths.get(backupSavePath, backupFileName).toString(), levelPath, false);
+
+
+//        try {
+//            Thread.sleep(1000);
+//        } catch (InterruptedException ignored) {
+//        }
+
+        return true;
+    }
+
+    @Override
+    public boolean touch() {
+        File backupSaveDirectoryFile = new File(backupSavePath);
+        return backupSaveDirectoryFile.isDirectory() || backupSaveDirectoryFile.mkdir();
+    }
+
+    @Override
+    public String getBackupFileName() {
+        return backupFileName;
+    }
+
+}