From 81497ebee2cdb0dac3bcdc26c5d77d06bdb98b5d Mon Sep 17 00:00:00 2001
From: Keuin <keuinx@gmail.com>
Date: Wed, 13 Jan 2021 12:51:15 +0800
Subject: Clean old incremental backup codes.

---
 .../operation/backup/IncrementalBackupUtil.java    | 90 ----------------------
 1 file changed, 90 deletions(-)
 delete mode 100644 src/main/java/com/keuin/kbackupfabric/operation/backup/IncrementalBackupUtil.java

(limited to 'src/main/java/com/keuin/kbackupfabric/operation/backup/IncrementalBackupUtil.java')

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;
-    }
-}
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