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| using System.Net; | |
| using System.Text.Json; | |
| using Tawasol.Domain.Exceptions; | |
| using Tawasol.Application.Common.Models; | |
| using Tawasol.Application.Common.Exceptions; | |
| namespace Tawasol.API.Middleware; | |
| public class ExceptionHandlingMiddleware(RequestDelegate next, ILogger<ExceptionHandlingMiddleware> logger) | |
| { | |
| public async Task InvokeAsync(HttpContext context) | |
| { | |
| try | |
| { | |
| await next(context); | |
| } | |
| catch (Exception ex) | |
| { | |
| logger.LogError(ex, "An unhandled exception occurred."); | |
| await HandleExceptionAsync(context, ex); | |
| } | |
| } | |
| private static Task HandleExceptionAsync(HttpContext context, Exception exception) | |
| { | |
| var code = HttpStatusCode.InternalServerError; | |
| Result? result = null; | |
| switch (exception) | |
| { | |
| case ValidationException validationException: | |
| code = HttpStatusCode.BadRequest; | |
| // Format errors as a list of "Property: Message" for simplicity or return the dictionary directly. | |
| // For Flutter UI, we'll flatten the dictionary to a list of error strings for the Errors property. | |
| var flattenedErrors = validationException.Errors | |
| .SelectMany(kvp => kvp.Value.Select(msg => $"{kvp.Key}: {msg}")) | |
| .ToList(); | |
| result = Result.Failure(flattenedErrors, "فشل التحقق من البيانات"); | |
| break; | |
| case NotFoundException notFoundException: | |
| code = HttpStatusCode.NotFound; | |
| result = Result.Failure(notFoundException.Message, "العنصر غير موجود"); | |
| break; | |
| case DomainException domainException: | |
| code = HttpStatusCode.BadRequest; | |
| result = Result.Failure(domainException.Message, "خطأ في منطق الأعمال"); | |
| break; | |
| default: | |
| result = Result.Failure("حدث خطأ داخلي في الخادم", "فشلت العملية"); | |
| break; | |
| } | |
| context.Response.ContentType = "application/json"; | |
| context.Response.StatusCode = (int)code; | |
| var options = new JsonSerializerOptions { PropertyNamingPolicy = JsonNamingPolicy.CamelCase }; | |
| return context.Response.WriteAsync(JsonSerializer.Serialize(result, options)); | |
| } | |
| } | |