Update CacheSystem

Assets/YooAsset/Runtime/CacheSystem/CacheSystem.cs

@@ -0,0 +1,133 @@
+using System;
+using System.IO;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace YooAsset
+{
+	internal static class CacheSystem
+	{
+		private readonly static HashSet<PatchBundle> _cacheBundles = new HashSet<PatchBundle>();
+		private readonly static Dictionary<string, string> _cachedHashList = new Dictionary<string, string>(1000);
+		private static EVerifyLevel _verifyLevel = EVerifyLevel.High;
+
+		public static void Initialize(EVerifyLevel verifyLevel)
+		{
+			_verifyLevel = verifyLevel;
+		}
+
+		public static void DestroyAll()
+		{
+			_cacheBundles.Clear();
+		}
+
+		public static void WriteInfoFileForCachedFile()
+		{
+
+		}
+		public static void ReadInfoFileForCachedFile()
+		{
+
+		}
+
+		public static void GetCachingDiskSpaceUsed()
+		{
+
+		}
+		public static void GetCachingDiskSpaceFree()
+		{
+
+		}
+
+		public static bool IsCached(PatchBundle patchBundle)
+		{
+			return false;
+		}
+		public static void ClearCache()
+		{
+
+		}
+
+
+
+
+		/// <summary>
+		/// 查询是否为验证文件
+		/// 注意：被收录的文件完整性是绝对有效的
+		/// </summary>
+		public static bool ContainsVerifyFile(string fileHash)
+		{
+			if (_cachedHashList.ContainsKey(fileHash))
+			{
+				string fileName = _cachedHashList[fileHash];
+				string filePath = SandboxHelper.MakeCacheFilePath(fileName);
+				if (File.Exists(filePath))
+				{
+					return true;
+				}
+				else
+				{
+					_cachedHashList.Remove(fileHash);
+					YooLogger.Error($"Cache file is missing : {fileName}");
+					return false;
+				}
+			}
+			else
+			{
+				return false;
+			}
+		}
+
+		/// <summary>
+		/// 缓存验证过的文件
+		/// </summary>
+		public static void CacheVerifyFile(string fileHash, string fileName)
+		{
+			if (_cachedHashList.ContainsKey(fileHash) == false)
+			{
+				YooLogger.Log($"Cache verify file : {fileName}");
+				_cachedHashList.Add(fileHash, fileName);
+			}
+		}
+
+		/// <summary>
+		/// 验证文件完整性
+		/// </summary>
+		public static bool CheckContentIntegrity(string filePath, long fileSize, string fileCRC)
+		{
+			return CheckContentIntegrity(_verifyLevel, filePath, fileSize, fileCRC);
+		}
+
+		/// <summary>
+		/// 验证文件完整性
+		/// </summary>
+		public static bool CheckContentIntegrity(EVerifyLevel verifyLevel, string filePath, long fileSize, string fileCRC)
+		{
+			try
+			{
+				if (File.Exists(filePath) == false)
+					return false;
+
+				// 先验证文件大小
+				long size = FileUtility.GetFileSize(filePath);
+				if (size != fileSize)
+					return false;
+
+				// 再验证文件CRC
+				if (verifyLevel == EVerifyLevel.High)
+				{
+					string crc = HashUtility.FileCRC32(filePath);
+					return crc == fileCRC;
+				}
+				else
+				{
+					return true;
+				}
+			}
+			catch (Exception)
+			{
+				return false;
+			}
+		}
+	}
+}