Merge pull request #1 from StansAssets/guid-generator

feat: create GuidGenerator

Author: stan-osipov

com.stansassets.plugins-dev-kit/Editor/Utility.meta

@@ -0,0 +1,78 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using UnityEngine;
+
+namespace StansAssets.Plugins.Editor
+{
+    public static class GuidGenerator
+    {
+        const int k_CountCharGiudField = 6;
+
+        public static void RegenerateGuid(string assetPath)
+        {
+            try
+            {
+                var path = $"{assetPath}.meta";
+                var metafile = File.ReadAllText(path);
+                var startGuid = metafile.IndexOf("guid:");
+                if (startGuid > 0)
+                {
+                    startGuid += k_CountCharGiudField;
+                    var endGuid = metafile.Substring(startGuid).IndexOf("\n");
+                    var oldGuid = metafile.Substring(startGuid, endGuid);
+                    metafile = metafile.Replace(oldGuid, Guid.NewGuid().ToString("N"));
+                    File.WriteAllText(path, metafile);
+                }
+                else
+                {
+                    Debug.LogError("Does not contain guid in the metafile");
+                }
+            }
+            catch (Exception exception)
+            {
+                Debug.LogError(exception.Message);
+            }
+        }
+
+        public static void RegenerateGuid(IEnumerable<string> assetPaths)
+        {
+            foreach (var assetPath in assetPaths)
+            {
+                RegenerateGuid(assetPath);
+            }
+        }
+
+        public static void RegenerateGuidsInFolder(string folderPath, bool recursive = false)
+        {
+            if (Directory.Exists(folderPath))
+                ProcessDirectory(folderPath, recursive);
+            
+            RegenerateGuid(folderPath);
+        }
+
+        public static void RegenerateGuidsInFolder(IEnumerable<string> folderPaths, bool recursive = false)
+        {
+            foreach (var assetPath in folderPaths)
+            {
+                RegenerateGuidsInFolder(assetPath, recursive);
+            }
+        }
+
+        static void ProcessDirectory(string targetDirectory, bool recursive = true)
+        {
+            string[] fileEntries = Directory.GetFiles(targetDirectory);
+            foreach (string fileName in fileEntries)
+                if (!fileName.Contains(".meta"))
+                    RegenerateGuid(fileName);
+
+            string[] subdirectoryEntries = Directory.GetDirectories(targetDirectory);
+            foreach (string subdirectory in subdirectoryEntries)
+            {
+                RegenerateGuid(subdirectory);
+                if (recursive)
+                    ProcessDirectory(subdirectory);
+            }
+        }
+    }
+}