1 files changed, 92 insertions, 0 deletions
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
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+++ b/src/main/java/com/keuin/kbackupfabric/operation/backup/method/ConfiguredIncrementalBackupMethod.java
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+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;
+    }
+
+
+}