261 lines
9.3 KiB
C#
261 lines
9.3 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Runtime.Serialization.Formatters.Binary;
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using UnityEngine;
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namespace AssetManagement
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{
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/// <summary>
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/// Blastom: 管理整个项目的资源路径，资源是否存在等问题
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/// </summary>
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public class AssetPathHub
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{
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// 当前版本可用的streamingAsset资源
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public readonly HashSet<string> streamingAssets = new HashSet<string>();
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private FileStream _fileStream;
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private BinaryFormatter _formatter;
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private float _lastSaveTime;
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private const float _autoSaveInterval = 300f;
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// 网络透传的资源情况
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public Dictionary<string, AssetDependencyItem> onlineAssets;
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// 当前版本persistent资源情况
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public Dictionary<string, string> persistAssets;
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private static string persistPath
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{
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get { return AssetConst.persistentDataPath.Open(AssetConst.pathFile + AssetConst.bytesExtension); }
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}
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// 下载路径超链接
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public string downloadUrl { get; private set; }
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// 执行三项对比，确认每个资源的位置
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// 简单处理。本身消耗不高，不进行额外优化
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public void Init(string uri, AssetDependencyInfo manifest)
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{
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_formatter = new BinaryFormatter();
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var streamingBytes =
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Resources.Load<TextAsset>(AssetConst.assetPathDataPath.Open(AssetConst.pathFile)).bytes;
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Dictionary<string, string> streamAssets;
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using (var ms = new MemoryStream(streamingBytes))
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{
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streamAssets = _formatter.Deserialize(ms) as Dictionary<string, string>;
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}
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if (streamAssets == null)
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throw new NullReferenceException("Failed to load streamingPathInfo, this is not recoverable!");
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if (File.Exists(persistPath))
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using (var fs = File.OpenRead(persistPath))
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{
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try
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{
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persistAssets = _formatter.Deserialize(fs) as Dictionary<string, string>;
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}
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catch (Exception e)
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{
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Debug.LogError(e);
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}
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}
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downloadUrl = uri;
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onlineAssets = new Dictionary<string, AssetDependencyItem>();
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foreach (var item in manifest.assetList)
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onlineAssets.Add(item.name, item);
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// 注：Persist资源不主动移除
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// 因此不能随意排除当前不匹配的项目
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if (persistAssets == null)
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persistAssets = new Dictionary<string, string>();
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// if (EngineManager.IsLocalRes)
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// foreach (var item in manifest.assetList)
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// streamingAssets.Add(item.name);
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// else
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// 填充StreamingAsset的情况
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// 这个是整个apk阶段都不变的
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foreach (var asset in streamAssets)
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{
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AssetDependencyItem online;
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if (onlineAssets.TryGetValue(asset.Key, out online) && online.md5 == asset.Value)
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streamingAssets.Add(asset.Key);
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}
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}
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public AssetDependencyItem GetPathData(string bundleName)
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{
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AssetDependencyItem online;
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onlineAssets.TryGetValue(bundleName, out online);
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return online;
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}
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/// <summary>
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/// 获得后台下载资源列表
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/// </summary>
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public List<AssetDependencyItem> GetBackgroundDownloadList()
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{
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var result = new List<AssetDependencyItem>();
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foreach (var item in onlineAssets.Values)
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if (GetPathState(item.name) == AssetPathState.online &&
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item.level > 0)
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result.Add(item);
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result.Sort((a, b) => a.importance.CompareTo(b.importance));
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return result;
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}
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public string[] GetAllDependencies(string bundleName)
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{
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AssetDependencyItem online;
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var result = onlineAssets.TryGetValue(bundleName, out online) ? online.dependencies : null;
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return result;
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}
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public int GetPathState(string bundleName)
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{
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var result = AssetPathState.unmarked;
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if (streamingAssets.Contains(bundleName))
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{
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result = AssetPathState.streaming;
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}
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else
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{
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AssetDependencyItem online;
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if (onlineAssets.TryGetValue(bundleName, out online))
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{
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string md5;
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if (persistAssets.TryGetValue(bundleName, out md5))
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result = md5 == online.md5 ? AssetPathState.persist : AssetPathState.online;
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else
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result = AssetPathState.online;
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}
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}
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return result;
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}
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public string GetPersistPath(string bundleName)
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{
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return AssetConst.GetPersistBundle(bundleName);
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}
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/// <summary>
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/// 强制获得在线路径
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/// </summary>
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public string GetDownloadPath(string bundleName)
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{
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string result;
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AssetDependencyItem online;
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if (onlineAssets.TryGetValue(bundleName, out online))
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result = downloadUrl.Open(online.version.ToString()).Open(bundleName);
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else
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{
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Debug.LogError("Unable to get path for unmarked asset " + bundleName);
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result = string.Empty;
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}
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return result;
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}
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public string GetPath(string bundleName)
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{
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var state = 0;
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string result;
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AssetDependencyItem online;
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if (onlineAssets.TryGetValue(bundleName, out online))
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state = GetPathState(bundleName);
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switch (state)
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{
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case AssetPathState.online:
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// ReSharper disable once PossibleNullReferenceException
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result = downloadUrl.Open(online.version.ToString()).Open(bundleName);
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break;
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case AssetPathState.persist:
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result = GetPersistPath(bundleName);
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break;
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case AssetPathState.streaming:
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result = AssetConst.streamingAssetsPath.Open(bundleName);
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break;
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default:
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Debug.LogError("Unable to get path for unmarked asset " + bundleName);
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result = string.Empty;
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break;
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}
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return result;
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}
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/// <summary>
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/// 加载资源失败的情况下，回滚当前Persist的记录
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/// </summary>
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public void LoadError(string bundle)
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{
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if (persistAssets.ContainsKey(bundle))
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persistAssets.Remove(bundle);
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else
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Debug.LogError(string.Format("Failed to load a non persist asset {0}! Could be some problem on I/O!", bundle));
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// SavePersistPathData();
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}
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/// <summary>
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/// 下载器下载成功后，通知更新资源配置
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/// </summary>
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public void DownloadComplete(BundleDownloader unit)
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{
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if (string.IsNullOrEmpty(unit.error))
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{
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AssetDependencyItem online;
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if (onlineAssets.TryGetValue(unit.name, out online))
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{
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persistAssets[online.name] = online.md5;
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if (_autoSaveInterval + Time.realtimeSinceStartup < _lastSaveTime)
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SavePersistPathData();
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}
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else
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Debug.LogError(string.Format(
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"Download an asset bundle {0}, which is not required for current version!",
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unit.name));
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}
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}
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public void SavePersistPathData()
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{
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_lastSaveTime = Time.realtimeSinceStartup;
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// 注：不创建的资源列表，防止出现问题
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if (persistAssets.Count > 0)
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{
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if (_fileStream == null)
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_fileStream = File.Open(persistPath, FileMode.OpenOrCreate);
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if (_fileStream != null)
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try
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{
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_fileStream.SetLength(0);
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_formatter.Serialize(_fileStream, persistAssets);
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}
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catch (Exception e)
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{
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Debug.LogError("Failed to Write to FileStream:\n" + e);
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}
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else
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Debug.LogError(string.Format("Failed to Open FileStream at path {0}", persistPath));
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}
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}
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public void Dispose()
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{
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if (_fileStream != null)
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{
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_fileStream.Dispose();
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_fileStream = null;
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}
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}
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}
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// 使用整数以提高Lua互用能力
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public static class AssetPathState
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{
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// 注：避开default(int)
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public const int streaming = 1;
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public const int persist = 2;
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public const int online = 3;
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public const int unmarked = 4;
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}
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}
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