1 files changed, 82 insertions, 0 deletions
diff --git a/src/main/java/com/keuin/kbackupfabric/util/backup/BackupFilesystemUtil.java b/src/main/java/com/keuin/kbackupfabric/util/backup/BackupFilesystemUtil.java
new file mode 100644
index 0000000..54c2f58
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/util/backup/BackupFilesystemUtil.java
@@ -0,0 +1,82 @@
+package com.keuin.kbackupfabric.util.backup;
+
+import com.keuin.kbackupfabric.util.ReflectionUtils;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.world.ThreadedAnvilChunkStorage;
+import net.minecraft.world.World;
+
+import java.io.File;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Functions deal with file name, directory name about Minecraft saves.
+ */
+public final class BackupFilesystemUtil {
+
+    private static final String backupSaveDirectoryName = "backups";
+    private static final String backupFileNamePrefix = "kbackup-";
+
+    public static String getBackupFileNamePrefix() {
+        return backupFileNamePrefix;
+    }
+
+    @Deprecated
+    public static String getBackupFileName(String backupName) {
+        return backupFileNamePrefix + backupName + ".zip";
+    }
+
+    @Deprecated
+    public static String getBackupName(String backupFileName) {
+        try {
+            if (backupFileName.matches(backupFileNamePrefix + ".+\\.zip"))
+                return backupFileName.substring(backupFileNamePrefix.length(), backupFileName.length() - 4);
+        } catch (IndexOutOfBoundsException ignored) {
+        }
+        return backupFileName;
+    }
+
+    public static boolean isBackupNameValid(String backupName, MinecraftServer server) {
+        File backupFile = new File(getBackupSaveDirectory(server), getBackupFileName(backupName));
+        return backupFile.isFile();
+    }
+
+    public static File getBackupSaveDirectory(MinecraftServer server) {
+        return new File(server.getRunDirectory(), backupSaveDirectoryName);
+    }
+
+    public static String getLevelPath(MinecraftServer server) {
+        return (new File(server.getRunDirectory(), server.getLevelName())).getAbsolutePath();
+    }
+
+    public static String getWorldDirectoryName(World world) throws NoSuchFieldException, IllegalAccessException {
+        File saveDir;
+        ThreadedAnvilChunkStorage threadedAnvilChunkStorage = (ThreadedAnvilChunkStorage) ReflectionUtils.getPrivateField(world.getChunkManager(), "threadedAnvilChunkStorage");
+        saveDir = (File) ReflectionUtils.getPrivateField(threadedAnvilChunkStorage, "saveDir");
+        return saveDir.getName();
+    }
+
+    @Deprecated
+    public static long getBackupTimeFromBackupFileName(String backupFileName) {
+        Matcher matcher = Pattern.compile("[0-9]{4}-[0-9]{2}-[0-9]{2}_[0-9]{2}-[0-9]{2}-[0-9]{2}").matcher(backupFileName);
+        if (matcher.find()) {
+            String timeString = matcher.group(0);
+            long timeStamp = BackupNameTimeFormatter.timeStringToEpochSeconds(timeString);
+            System.out.println(backupFileName + " -> " + timeStamp);
+            return timeStamp;
+        } else {
+            System.err.println("Failed to extract time from " + backupFileName);
+        }
+        return -1;
+    }
+
+    public static String humanFileSize(long size) {
+        double fileSize = size * 1.0 / 1024 / 1024; // Default unit is MB
+        if (fileSize > 1000)
+            //msgInfo(context, String.format("File size: %.2fGB", fileSize / 1024));
+            return String.format("%.2fGB", fileSize / 1024);
+        else
+            //msgInfo(context, String.format("File size: %.2fMB", fileSize));
+            return String.format("%.2fMB", fileSize);
+    }
+}