From 2c70cb441d8c8eb73b977fd868fe022a442cd0ce Mon Sep 17 00:00:00 2001
From: Alejandro Sarmiento <alejandrosarsan@protonmail.com>
Date: Tue, 20 Feb 2024 01:13:12 +0100
Subject: [PATCH] =?UTF-8?q?Exception=20Middleware=20A=C3=B1adido=20y=20fun?=
 =?UTF-8?q?cionando=20de=20aquella=20manera?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../Errors/CodeErrorException.cs              | 13 ++++++
 .../Errors/CodeErrorResponse.cs               | 26 +++++++++++
 .../Middlewares/ExceptionMiddleware.cs        | 44 +++++++++++++++++++
 .../CleanArchitecture.API/Program.cs          |  3 ++
 4 files changed, 86 insertions(+)
 create mode 100644 CleanArchitecture/CleanArchitecture.API/Errors/CodeErrorException.cs
 create mode 100644 CleanArchitecture/CleanArchitecture.API/Errors/CodeErrorResponse.cs
 create mode 100644 CleanArchitecture/CleanArchitecture.API/Middlewares/ExceptionMiddleware.cs

diff --git a/CleanArchitecture/CleanArchitecture.API/Errors/CodeErrorException.cs b/CleanArchitecture/CleanArchitecture.API/Errors/CodeErrorException.cs
new file mode 100644
index 0000000..e665036
--- /dev/null
+++ b/CleanArchitecture/CleanArchitecture.API/Errors/CodeErrorException.cs
@@ -0,0 +1,13 @@
+namespace CleanArchitecture.API.Errors
+{
+    public class CodeErrorException : CodeErrorResponse
+    {
+
+        public string? Details { get; set; }
+        public CodeErrorException(int statusCode, string? message = null, string? details = null) : base(statusCode, message)
+        {
+
+            Details = details;
+        }
+    }
+}
diff --git a/CleanArchitecture/CleanArchitecture.API/Errors/CodeErrorResponse.cs b/CleanArchitecture/CleanArchitecture.API/Errors/CodeErrorResponse.cs
new file mode 100644
index 0000000..9ba1ef0
--- /dev/null
+++ b/CleanArchitecture/CleanArchitecture.API/Errors/CodeErrorResponse.cs
@@ -0,0 +1,26 @@
+namespace CleanArchitecture.API.Errors
+{
+    public class CodeErrorResponse
+    {
+        public int StatusCode { get; set; }
+        public string? Message { get; set; }
+
+        public CodeErrorResponse(int statusCode, string? message = null)
+        {
+            StatusCode = statusCode;
+            Message = message ?? GetDefaultMessageStatusCode(statusCode);
+        }
+
+        private string GetDefaultMessageStatusCode(int statusCode)
+        {
+            return statusCode switch
+            {
+                400 => "The request sent have errors",
+                401 => "You are not authorized",
+                404 => "Resource not found",
+                500 => "An internal server error occurred",
+                _ => string.Empty
+            };
+        }
+    }
+}
diff --git a/CleanArchitecture/CleanArchitecture.API/Middlewares/ExceptionMiddleware.cs b/CleanArchitecture/CleanArchitecture.API/Middlewares/ExceptionMiddleware.cs
new file mode 100644
index 0000000..75a6327
--- /dev/null
+++ b/CleanArchitecture/CleanArchitecture.API/Middlewares/ExceptionMiddleware.cs
@@ -0,0 +1,44 @@
+using CleanArchitecture.API.Errors;
+using System.Net;
+using System.Text.Json;
+
+namespace CleanArchitecture.API.Middlewares
+{
+    public class ExceptionMiddleware
+    {
+        private readonly RequestDelegate _next;
+        private readonly ILogger<ExceptionMiddleware> _logger;
+        private readonly IWebHostEnvironment _env;
+
+        public ExceptionMiddleware(RequestDelegate next, ILogger<ExceptionMiddleware> logger, IWebHostEnvironment env)
+        {
+            _next = next;
+            _logger = logger;
+            _env = env;
+        }
+
+        public async Task InvokeAsync(HttpContext context)
+        {
+            try
+            {
+                await _next(context);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, ex.Message);
+                context.Response.ContentType = "application/json";
+                context.Response.StatusCode = StatusCodes.Status500InternalServerError;
+
+                var response = _env.IsDevelopment() ?
+                    new CodeErrorException((int)HttpStatusCode.InternalServerError, ex.Message, ex.StackTrace)
+                    : new CodeErrorException((int)HttpStatusCode.InternalServerError);
+
+                var options = new JsonSerializerOptions { PropertyNamingPolicy = JsonNamingPolicy.CamelCase };
+                var json = JsonSerializer.Serialize(response, options);
+
+                await context.Response.WriteAsync(json);
+
+            }
+        }
+    }
+}
diff --git a/CleanArchitecture/CleanArchitecture.API/Program.cs b/CleanArchitecture/CleanArchitecture.API/Program.cs
index f1f8b0b..24c6b45 100644
--- a/CleanArchitecture/CleanArchitecture.API/Program.cs
+++ b/CleanArchitecture/CleanArchitecture.API/Program.cs
@@ -1,6 +1,7 @@
 using CleanArchitecture.Application;
 using CleanArchitecture.Infrastructure;
 using CleanArchitecture.Identity;
+using CleanArchitecture.API.Middlewares;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -34,6 +35,8 @@ if (app.Environment.IsDevelopment())
     app.UseSwaggerUI();
 }
 
+app.UseMiddleware<ExceptionMiddleware>();
+
 app.UseAuthentication();
 app.UseAuthorization();