Add exception handling middleware

Implement global exception handling to provide consistent error responses.
Registes custom exceptions with corresponding HTTP status codes and descriptions.

DrinkRateAPI/Controllers/UserProfileController.cs

@@ -19,6 +19,7 @@ public class UserProfileController : ControllerBase
         _userProfileService = userProfileService;
     }
 
+    [HttpPut]
     public UserProfileGet PutUserProfile([FromBody] UserProfilePut userProfile)
     {
         throw new ApplicationException();

DrinkRateAPI/Exceptions/ExceptionHandlingMiddleware.cs

@@ -1,8 +1,9 @@
 using System.Net;
+using Microsoft.AspNetCore.Http.HttpResults;
 
 namespace DrinkRateAPI.Exceptions;
 
-public record ExceptionResponse(HttpStatusCode StatusCode, string Description);
+public record ExceptionResponse(int StatusCode, string Description);
 
 public class ExceptionHandlingMiddleware
 {
@@ -32,16 +33,20 @@ public class ExceptionHandlingMiddleware
         _logger.LogError(exception, "An unexpected error occurred.");
 
 
-        ExceptionResponse response = exception switch
+        var response = exception switch
         {
-            ApplicationException _ => new ExceptionResponse(HttpStatusCode.BadRequest, "Application exception occurred."),
+            BadRequestException _ => new ExceptionResponse(StatusCodes.Status400BadRequest, "Application exception occurred."),
-            KeyNotFoundException _ => new ExceptionResponse(HttpStatusCode.NotFound, "The request key not found."),
+            NotFoundException _ => new ExceptionResponse(StatusCodes.Status404NotFound, "The request key not found."),
-            UnauthorizedAccessException _ => new ExceptionResponse(HttpStatusCode.Unauthorized, "Unauthorized."),
+            UnauthenticatedException _ => new ExceptionResponse(StatusCodes.Status401Unauthorized, "Unauthorized."),
-            _ => new ExceptionResponse(HttpStatusCode.InternalServerError, "Internal server error. Please retry later.")
+            PaymentRequiredException _ => new ExceptionResponse(StatusCodes.Status402PaymentRequired, "Payment required."),
+            ForbiddenException _ => new ExceptionResponse(StatusCodes.Status403Forbidden, "Forbidden."),
+            IamATeapotException _ => new ExceptionResponse(StatusCodes.Status418ImATeapot, "I am a teapot."),
+            UnavailableForLagalReasonsException _ => new ExceptionResponse(StatusCodes.Status451UnavailableForLegalReasons, "Unavailable for legal reasons."),
+            _ => new ExceptionResponse(StatusCodes.Status500InternalServerError, "Internal server error. Please retry later.")
         };
 
         context.Response.ContentType = "application/json";
-        context.Response.StatusCode = (int)response.StatusCode;
+        context.Response.StatusCode = response.StatusCode;
         await context.Response.WriteAsJsonAsync(response);
     }
 }

DrinkRateAPI/Program.cs

@@ -1,6 +1,7 @@
 using DrinkRateAPI.AuthorizationPolicies;
 using DrinkRateAPI.Contexts;
 using DrinkRateAPI.DbEntities;
+using DrinkRateAPI.Exceptions;
 using DrinkRateAPI.Services;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Identity;
@@ -70,6 +71,8 @@ if (app.Environment.IsDevelopment())
 
 app.MapIdentityApi<DbApplicationUser>();
 
+app.UseMiddleware<ExceptionHandlingMiddleware>();
+
 app.UseHttpsRedirection();
 
 app.UseAuthorization();