2 files changed, 47 insertions, 0 deletions
diff --git a/src/main/java/com/keuin/kbackupfabric/util/BackupFilesystemUtil.java b/src/main/java/com/keuin/kbackupfabric/util/BackupFilesystemUtil.java
index 5b8ba5a..ce39615 100644
--- a/src/main/java/com/keuin/kbackupfabric/util/BackupFilesystemUtil.java
+++ b/src/main/java/com/keuin/kbackupfabric/util/BackupFilesystemUtil.java
@@ -5,6 +5,8 @@ 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.
@@ -50,4 +52,27 @@ public final class BackupFilesystemUtil {
     public static String getBackupFileNamePrefix() {
         return backupFileNamePrefix;
     }
+
+    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);
+    }
 }
diff --git a/src/main/java/com/keuin/kbackupfabric/util/BackupNameTimeFormatter.java b/src/main/java/com/keuin/kbackupfabric/util/BackupNameTimeFormatter.java
new file mode 100644
index 0000000..5d00270
--- /dev/null
+++ b/src/main/java/com/keuin/kbackupfabric/util/BackupNameTimeFormatter.java
@@ -0,0 +1,22 @@
+package com.keuin.kbackupfabric.util;
+
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.ZoneOffset;
+import java.time.format.DateTimeFormatter;
+
+public class BackupNameTimeFormatter {
+    private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd_HH-mm-ss");
+
+    public static String getTimeString() {
+        return LocalDateTime.now().format(formatter);
+    }
+
+    public static long timeStringToEpochSeconds(String timeString) {
+        ZoneId systemZone = ZoneId.systemDefault(); // my timezone
+        LocalDateTime localDateTime = LocalDateTime.parse(timeString, formatter);
+        ZoneOffset currentOffsetForMyZone = systemZone.getRules().getOffset(localDateTime);
+        return localDateTime.toEpochSecond(currentOffsetForMyZone);
+    }
+
+}