Second commit

Assets/Tremble/Editor/Utils/ModTimeDB.cs

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+//
+// This file is part of the Tremble package by Tiny Goose.
+// Copyright (c) 2024-2026 TinyGoose Ltd., All Rights Reserved.
+//
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using UnityEditor;
+using UnityEngine;
+using Object = UnityEngine.Object;
+
+namespace TinyGoose.Tremble.Editor
+{
+	public class ModTimeDB
+	{
+		private readonly string m_DbFile;
+		private readonly Dictionary<string, ulong> m_Data = new();
+
+		public ModTimeDB(string dbFile)
+		{
+			m_DbFile = dbFile;
+			ReadFromFile();
+		}
+
+		public ulong GetFileModifiedTime(Object asset)
+		{
+			string assetDatabasePath = AssetDatabase.GetAssetPath(asset);
+			if (assetDatabasePath.IsNullOrEmpty() || !m_Data.TryGetValue(assetDatabasePath, out ulong time))
+				return 0ul;
+
+			return time;
+		}
+
+		public void SetFileModifiedTime(Object asset, ulong time)
+		{
+			string assetDatabasePath = AssetDatabase.GetAssetPath(asset);
+			if (assetDatabasePath.IsNullOrEmpty())
+				return;
+
+			m_Data[assetDatabasePath] = time;
+		}
+
+		public static ulong CalcModelModifiedTime(GameObject gameObject)
+		{
+			ulong time = 0ul;
+
+			// Prefab time
+			AppendObjectModifiedTime(gameObject, ref time);
+
+			// Materials
+			foreach (Renderer renderer in gameObject.GetComponentsInChildren<Renderer>())
+			{
+				foreach (Material material in renderer.sharedMaterials)
+				{
+					if (!material)
+						continue;
+
+					ulong matTime = CalcMaterialModifiedTime(material);
+					if (matTime > time)
+					{
+						time = matTime;
+					}
+				}
+			}
+
+			// Meshes
+			foreach (MeshFilter filter in gameObject.GetComponentsInChildren<MeshFilter>())
+			{
+				if (!filter.sharedMesh)
+					continue;
+
+				AppendObjectModifiedTime(filter.sharedMesh, ref time);
+			}
+
+			return time;
+		}
+
+		public static ulong CalcMaterialModifiedTime(Material material)
+		{
+			ulong time = 0ul;
+
+			// Material time
+			AppendObjectModifiedTime(material, ref time);
+
+			if (material.shader)
+			{
+				// Shader time
+            AppendObjectModifiedTime(material.shader, ref time);
+
+            foreach (string texName in material.GetTexturePropertyNames())
+            {
+	            // Texture times
+	            Texture texture = material.GetTexture(texName);
+	            if (!texture)
+		            continue;
+
+	            AppendObjectModifiedTime(texture, ref time);
+            }
+			}
+
+			return time;
+		}
+
+
+		private void ReadFromFile()
+		{
+			if (!File.Exists(m_DbFile))
+				return;
+
+			string data = File.ReadAllText(m_DbFile);
+
+			TokenParser tp = new(data);
+			while (!tp.IsAtEnd)
+			{
+				ReadOnlySpan<char> file = tp.ReadToken(supportCommentsAndQuotes: true);
+				ulong time = tp.ReadUlong();
+
+				m_Data[file.ToString()] = time;
+			}
+		}
+
+		public void WriteToFile()
+		{
+			using FileStream stream = new(m_DbFile, FileMode.Create, FileAccess.Write);
+			using StreamWriter writer = new(stream);
+
+			foreach ((string file, ulong time) in m_Data)
+			{
+				writer.WriteLine($"\"{file}\" {time}");
+			}
+		}
+
+		public static ulong GetObjectModifiedTime(Object unityObject)
+		{
+			string objectPath = AssetDatabase.GetAssetPath(unityObject);
+
+			if (objectPath.IsNullOrEmpty())
+				return 0ul;
+
+			AssetImporter importer = AssetImporter.GetAtPath(objectPath);
+			if (!importer)
+				return 0ul;
+
+			return importer.assetTimeStamp;
+		}
+
+		private static void AppendObjectModifiedTime(Object unityObject, ref ulong time)
+		{
+			ulong thisTime = GetObjectModifiedTime(unityObject);
+
+			if (thisTime > time)
+			{
+				time = thisTime;
+			}
+		}
+	}
+}