fix

Application/ImportApplication.cs

@@ -0,0 +1,112 @@
+namespace Application;
+
+/// <summary>
+/// 导入类型
+/// </summary>
+public enum ImportType
+{
+    /// <summary>
+    /// 支付宝
+    /// </summary>
+    Alipay,
+
+    /// <summary>
+    /// 微信
+    /// </summary>
+    WeChat
+}
+
+/// <summary>
+/// 导入应用服务接口
+/// </summary>
+public interface IImportApplication
+{
+    /// <summary>
+    /// 导入支付宝账单
+    /// </summary>
+    Task<ImportResponse> ImportAlipayAsync(ImportRequest request);
+
+    /// <summary>
+    /// 导入微信账单
+    /// </summary>
+    Task<ImportResponse> ImportWeChatAsync(ImportRequest request);
+}
+
+/// <summary>
+/// 导入应用服务实现
+/// </summary>
+public class ImportApplication(
+    IImportService importService,
+    ILogger<ImportApplication> logger
+) : IImportApplication
+{
+    private static readonly string[] AllowedExtensions = { ".csv", ".xlsx", ".xls" };
+    private const long MaxFileSize = 10 * 1024 * 1024; // 10MB
+
+
+    public async Task<ImportResponse> ImportAlipayAsync(ImportRequest request)
+    {
+        ValidateRequest(request);
+
+        var (ok, message) = await importService.ImportAlipayAsync(
+            (MemoryStream)request.FileStream, 
+            request.FileExtension
+        );
+
+        if (!ok)
+        {
+            throw new BusinessException(message);
+        }
+
+        logger.LogInformation("支付宝账单导入成功: {Message}", message);
+        return new ImportResponse { Message = message };
+    }
+
+    public async Task<ImportResponse> ImportWeChatAsync(ImportRequest request)
+    {
+        ValidateRequest(request);
+
+        var (ok, message) = await importService.ImportWeChatAsync(
+            (MemoryStream)request.FileStream, 
+            request.FileExtension
+        );
+
+        if (!ok)
+        {
+            throw new BusinessException(message);
+        }
+
+        logger.LogInformation("微信账单导入成功: {Message}", message);
+        return new ImportResponse { Message = message };
+    }
+
+    /// <summary>
+    /// 验证导入请求
+    /// </summary>
+    private static void ValidateRequest(ImportRequest request)
+    {
+        // 验证文件流
+        if (request.FileStream == null || request.FileStream.Length == 0)
+        {
+            throw new ValidationException("请选择要上传的文件");
+        }
+
+        // 验证文件扩展名
+        if (string.IsNullOrWhiteSpace(request.FileExtension))
+        {
+            throw new ValidationException("文件扩展名不能为空");
+        }
+
+        var extension = request.FileExtension.ToLowerInvariant();
+        if (!AllowedExtensions.Contains(extension))
+        {
+            throw new ValidationException("只支持 CSV 或 Excel 文件格式");
+        }
+
+        // 验证文件大小
+        if (request.FileSize > MaxFileSize)
+        {
+            throw new ValidationException("文件大小不能超过 10MB");
+        }
+    }
+}