feat(storage): refactor storage service and provider interface, support dynamic registration of storage providers

Services/StorageService.cs

@@ -0,0 +1,106 @@
+using System.Reflection;
+using Foxel.Models.DataBase;
+using Foxel.Services.Attributes;
+using Foxel.Services.Interface;
+
+namespace Foxel.Services;
+
+/// <summary>
+/// 统一的存储服务实现
+/// </summary>
+public class StorageService : IStorageService
+{
+    private readonly IServiceProvider _serviceProvider;
+    private readonly Dictionary<StorageType, Type> _storageProviders = new();
+
+    public StorageService(IServiceProvider serviceProvider)
+    {
+        _serviceProvider = serviceProvider;
+        RegisterStorageProviders();
+    }
+
+    /// <summary>
+    /// 使用反射扫描和注册所有标记了StorageProviderAttribute的存储提供者
+    /// </summary>
+    private void RegisterStorageProviders()
+    {
+        // 获取当前应用程序域中所有程序集
+        var assemblies = AppDomain.CurrentDomain.GetAssemblies();
+        
+        foreach (var assembly in assemblies)
+        {
+            try
+            {
+                // 扫描每个程序集中的所有类型
+                var types = assembly.GetTypes()
+                    .Where(type => type is { IsClass: true, IsAbstract: false } && 
+                                   type.GetInterfaces().Contains(typeof(IStorageProvider)) &&
+                                   type.GetCustomAttribute<StorageProviderAttribute>() != null);
+
+                foreach (var type in types)
+                {
+                    var attribute = type.GetCustomAttribute<StorageProviderAttribute>();
+                    if (attribute != null)
+                    {
+                        // 注册存储提供者类型与对应的存储类型
+                        _storageProviders[attribute.StorageType] = type;
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"扫描程序集 {assembly.FullName} 出错: {ex.Message}");
+                // 继续扫描其他程序集
+            }
+        }
+    }
+
+    /// <summary>
+    /// 获取指定存储类型的提供者实例
+    /// </summary>
+    public IStorageProvider GetProvider(StorageType storageType)
+    {
+        if (!_storageProviders.TryGetValue(storageType, out var providerType))
+        {
+            throw new ArgumentException($"未找到存储类型 {storageType} 的提供者");
+        }
+
+        return (IStorageProvider)_serviceProvider.GetRequiredService(providerType);
+    }
+
+    /// <summary>
+    /// 使用指定存储类型保存文件
+    /// </summary>
+    public Task<string> SaveAsync(StorageType storageType, Stream fileStream, string fileName, string contentType)
+    {
+        var provider = GetProvider(storageType);
+        return provider.SaveAsync(fileStream, fileName, contentType);
+    }
+
+    /// <summary>
+    /// 使用指定存储类型删除文件
+    /// </summary>
+    public Task DeleteAsync(StorageType storageType, string storagePath)
+    {
+        var provider = GetProvider(storageType);
+        return provider.DeleteAsync(storagePath);
+    }
+
+    /// <summary>
+    /// 使用指定存储类型获取文件URL
+    /// </summary>
+    public string GetUrl(StorageType storageType, string storagePath)
+    {
+        var provider = GetProvider(storageType);
+        return provider.GetUrl(storagePath);
+    }
+
+    /// <summary>
+    /// 使用指定存储类型下载文件
+    /// </summary>
+    public Task<string> DownloadFileAsync(StorageType storageType, string storagePath)
+    {
+        var provider = GetProvider(storageType);
+        return provider.DownloadFileAsync(storagePath);
+    }
+}