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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.Linq;
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+using ET;
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+using UnityEngine;
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+using UnityEngine.Networking;
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+
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+namespace GFGGame
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+{
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+ public class PictureDataManager : SingletonBase<PictureDataManager>
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+ {
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+ //本地地址
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+ private const string _loadUrl = "gfgpicture";
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+
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+ //正在操作的文件队列
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+ private Queue<string> _queueOperateFileList = new Queue<string>();
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+
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+ /// <summary>
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+ /// 所有照片的二进制
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+ /// </summary>
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+ private Dictionary<string, Texture2D> _allPicByteDic = new Dictionary<string, Texture2D>();
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+
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+ public async ETTask<Texture2D> GetPicNTexture(string tempUrl)
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+ {
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+ string fileNameKey = GetUrlFileName(tempUrl);
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+ if (_allPicByteDic.TryGetValue(fileNameKey, out Texture2D texture2D))
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+ {
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+ // 可能存在
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+ if (texture2D != null &&
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+ texture2D.width > 0 &&
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+ texture2D.height > 0 &&
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+ texture2D.GetPixels().Length > 0)
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+ {
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+ // 检查纹理的格式是否支持
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+ if (texture2D.format == TextureFormat.RGBA32 ||
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+ texture2D.format == TextureFormat.RGB24)
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+ {
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+ // 纹理有效，可以正常显示
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+ return texture2D; // 或者转换为 NTexture 对象
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+ }
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+ else
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+ {
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+ Debug.LogError("Texture format is not supported.");
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+ // 处理不支持的纹理格式
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+ return await DownloadOrLoadPic(tempUrl);
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+ }
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+ }
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+ else
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+ {
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+ Debug.LogWarning("Texture is invalid or has no pixels.");
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+ // 处理无效的纹理
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+ return await DownloadOrLoadPic(tempUrl);
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+ }
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+ }
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+
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+ //TODO 一定不存在, 需要去进行下载
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+ return await DownloadOrLoadPic(tempUrl);
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+ }
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+
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+ //从远端进行下载
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+ public async ETTask<Texture2D> DownloadOrLoadPic(string tempUrl)
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+ {
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+ string fileName = GetUrlFileName(tempUrl);
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+ Texture2D texture2D = await DownloadPictureAsync(tempUrl);
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+ if (texture2D == null)
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+ {
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+ return GetDefaultTexture();
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+ }
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+
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+ //不为null, 以协程的方式存储到内存以及, 本地
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+
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+ _allPicByteDic[fileName] = texture2D;
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+ //加入队列
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+ _queueOperateFileList.Enqueue(fileName);
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+ SavaPicToLoad().Coroutine();
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+
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+ return texture2D;
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+ }
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+
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+ //存储图片文件到本地,如果存在就进行删除本地或者覆盖,以当前的为最新的进行记录
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+ public async ETTask SavaPicToLoad()
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+ {
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+ var tempList = _queueOperateFileList.ToList();
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+
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+ for (int i = 0; i < tempList.Count; i++)
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+ {
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+ if (_queueOperateFileList.Count == 0)
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+ {
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+ break;
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+ }
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+
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+ string fileName = _queueOperateFileList.Dequeue();
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+ if (string.IsNullOrEmpty(fileName))
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+ {
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+ continue;
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+ }
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+
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+ if (!_allPicByteDic.TryGetValue(fileName, out Texture2D texture2D))
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+ {
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+ continue;
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+ }
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+
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+ if (texture2D == null)
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+ {
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+ continue;
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+ }
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+
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+ // 获取本地存储路径
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+ string localPath = Path.Combine(Application.persistentDataPath, fileName);
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+
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+ // 存储图片文件到本地
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+ try
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+ {
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+ // 将 Texture2D 转换为字节数组
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+ byte[] imageData = texture2D.EncodeToPNG();
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+
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+ // 如果文件已经存在，则覆盖
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+ if (File.Exists(localPath))
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+ {
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+ File.Delete(localPath);
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+ }
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+
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+ // 将字节数组写入文件
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+ File.WriteAllBytes(localPath, imageData);
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+ }
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+ catch (Exception ex)
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+ {
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+ Debug.LogError($"Failed to save image to local path: {ex.Message}");
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+ }
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+ }
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+
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+ await ETTask.CompletedTask;
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+ }
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+
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+ private async ETTask<Texture2D> DownloadPictureAsync(string tempUrl, int count = 0)
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+ {
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+ string fileName = GetUrlFileName(tempUrl);
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+
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+ if (count >= 3)
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+ {
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+ PromptController.Instance.ShowFloatTextPrompt("下载失败");
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+ ViewManager.Hide<ModalStatusView>();
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+ return null;
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+ }
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+
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+ using (UnityWebRequest request = UnityWebRequestTexture.GetTexture(tempUrl))
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+ {
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+ var asyncOperation = request.SendWebRequest();
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+
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+ while (!asyncOperation.isDone)
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+ {
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+ await TimerComponent.Instance.WaitTillAsync(100); // 等待一段时间后继续检查
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+ }
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+
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+ if (request.result == UnityWebRequest.Result.ProtocolError ||
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+ request.result == UnityWebRequest.Result.ConnectionError)
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+ {
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+ count += 1;
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+ return await DownloadPictureAsync(tempUrl, count); // 递归重试
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+ }
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+ else
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+ {
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+ Texture2D texture = (request.downloadHandler as DownloadHandlerTexture).texture;
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+ return texture;
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+ }
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+ }
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+ }
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+
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+ // 获取存储文件的完整路径
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+ public static string GetFilePath(string fileName)
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+ {
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+ // 获取持久化数据路径
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+ string persistentDataPath = Application.persistentDataPath;
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+
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+ // 创建“zhaoPian”文件夹路径
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+ string folderPath = Path.Combine(persistentDataPath, _loadUrl);
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+
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+ // 确保文件夹存在
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+ if (!Directory.Exists(folderPath))
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+ {
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+ Directory.CreateDirectory(folderPath);
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+ }
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+
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+ // 返回文件的完整路径
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+ return Path.Combine(folderPath, fileName);
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+ }
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+
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+ /// <summary>
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+ /// 获取下载地址的文件名, 包含后缀 TODO 需要增加容错
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+ /// </summary>
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+ /// <param name="url"></param>
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+ /// <returns></returns>
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+ public static string GetUrlFileName(string url)
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+ {
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+ // 创建一个 Uri 对象
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+ Uri uri = new Uri(url);
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+
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+ // 获取 URL 的路径部分
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+ string path = uri.AbsolutePath;
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+
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+ // 从路径中提取文件名
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+ string fileName = System.IO.Path.GetFileName(path);
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+
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+ // // 获取不包含扩展名的文件名
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+ // string fileNameWithoutExtension = System.IO.Path.GetFileNameWithoutExtension(fileName);
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+
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+ return fileName;
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+ }
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+
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+ //TODO 默认纹理, 让客户端来修改这个代码, 定义一个默认的 Texture2D
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+ private Texture2D GetDefaultTexture()
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+ {
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+ // 创建一个简单的默认图片，比如纯色或空白图片
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+ Texture2D defaultTexture = new Texture2D(2, 2);
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+ Color[] pixels = defaultTexture.GetPixels();
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+ for (int i = 0; i < pixels.Length; i++)
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+ {
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+ pixels[i] = Color.gray; // 设置为灰色的默认图片
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+ }
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+
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+ defaultTexture.SetPixels(pixels);
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+ defaultTexture.Apply();
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+
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+ return defaultTexture;
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+ }
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+
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+ //初始化的时候根据图片保存时间, 加载最多50条到内存中
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+ public void LoadAllImages()
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+ {
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+ // 获取文件夹路径
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+ string folderPath = Path.Combine(Application.persistentDataPath, _loadUrl);
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+
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+ // 检查文件夹是否存在
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+ if (Directory.Exists(folderPath))
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+ {
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+ // 获取所有图片文件路径（假设图片格式为.jpg和.png）
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+ string[] imageFiles = Directory.GetFiles(folderPath, "*.*", SearchOption.TopDirectoryOnly);
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+
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+ // 过滤出图片文件，并按修改时间排序
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+ var imageFileInfos = imageFiles
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+ .Where(filePath => filePath.EndsWith(".jpg") || filePath.EndsWith(".png"))
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+ .Select(filePath => new FileInfo(filePath))
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+ .OrderByDescending(fileInfo => fileInfo.LastWriteTime)
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+ .ToList();
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+
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+ int loadedCount = 0;
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+ const int maxImagesToLoad = 50;
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+
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+ foreach (var fileInfo in imageFileInfos)
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+ {
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+ string filePath = fileInfo.FullName;
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+
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+ try
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+ {
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+ // 读取图片数据
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+ byte[] imageData = File.ReadAllBytes(filePath);
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+
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+ // 创建纹理并加载数据
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+ Texture2D texture = new Texture2D(2, 2); // 创建一个2x2的空纹理
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+ if (texture.LoadImage(imageData))
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+ {
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+ // 提取文件名作为字典的键
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+ string fileName = Path.GetFileName(filePath);
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+
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+ // 将纹理添加到字典
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+ _allPicByteDic[fileName] = texture;
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+
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+ Debug.Log($"Loaded {fileName}");
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+
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+ loadedCount++;
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+
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+ // 如果已经加载了最大数量的图片，停止加载并删除剩余较旧的图片
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+ if (loadedCount >= maxImagesToLoad)
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+ {
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+ DeleteOldImages(imageFileInfos, loadedCount);
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+ return;
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+ }
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+ }
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+ else
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+ {
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+ Debug.LogWarning($"Failed to load image from {filePath}");
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+ }
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+ }
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+ catch
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+ {
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+ Debug.LogWarning($"Error processing file: {filePath}");
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+ }
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+ }
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+ }
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+ else
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+ {
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+ Debug.LogWarning($"Folder not found: {folderPath}");
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+ }
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+ }
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+
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+ // 删除较旧的图片
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+ private void DeleteOldImages(List<FileInfo> imageFileInfos, int loadedCount)
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+ {
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+ // 从已经加载的图片后面开始删除
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+ for (int i = loadedCount; i < imageFileInfos.Count; i++)
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+ {
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+ string filePath = imageFileInfos[i].FullName;
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+ try
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+ {
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+ File.Delete(filePath);
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+ Debug.Log($"Deleted {filePath}");
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+ }
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+ catch (Exception ex)
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+ {
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+ Debug.LogWarning($"Failed to delete {filePath}: {ex.Message}");
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+ }
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+ }
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+ }
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+ }
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+}
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