Move dotnet api into new directory

web/backend/API/API.Core/GlobalException.cs

@@ -0,0 +1,109 @@
+// API.Core/Filters/GlobalExceptionFilter.cs
+
+using API.Core.Contracts.Common;
+using Domain.Exceptions;
+using FluentValidation;
+using Microsoft.Data.SqlClient;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Filters;
+
+namespace API.Core;
+
+public class GlobalExceptionFilter(ILogger<GlobalExceptionFilter> logger)
+    : IExceptionFilter
+{
+    public void OnException(ExceptionContext context)
+    {
+        logger.LogError(context.Exception, "Unhandled exception occurred");
+
+        switch (context.Exception)
+        {
+            case FluentValidation.ValidationException fluentValidationException:
+                var errors = fluentValidationException
+                    .Errors.GroupBy(e => e.PropertyName)
+                    .ToDictionary(
+                        g => g.Key,
+                        g => g.Select(e => e.ErrorMessage).ToArray()
+                    );
+
+                context.Result = new BadRequestObjectResult(
+                    new { message = "Validation failed", errors }
+                );
+                context.ExceptionHandled = true;
+                break;
+
+            case ConflictException ex:
+                context.Result = new ObjectResult(
+                    new ResponseBody { Message = ex.Message }
+                )
+                {
+                    StatusCode = 409,
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            case NotFoundException ex:
+                context.Result = new ObjectResult(
+                    new ResponseBody { Message = ex.Message }
+                )
+                {
+                    StatusCode = 404,
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            case UnauthorizedException ex:
+                context.Result = new ObjectResult(
+                    new ResponseBody { Message = ex.Message }
+                )
+                {
+                    StatusCode = 401,
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            case ForbiddenException ex:
+                context.Result = new ObjectResult(
+                    new ResponseBody { Message = ex.Message }
+                )
+                {
+                    StatusCode = 403,
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            case SqlException ex:
+                context.Result = new ObjectResult(
+                    new ResponseBody { Message = "A database error occurred." }
+                )
+                {
+                    StatusCode = 503,
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            case Domain.Exceptions.ValidationException ex:
+                context.Result = new ObjectResult(
+                    new ResponseBody { Message = ex.Message }
+                )
+                {
+                    StatusCode = 400,
+                };
+                context.ExceptionHandled = true;
+                break;
+
+            default:
+                context.Result = new ObjectResult(
+                    new ResponseBody
+                    {
+                        Message = "An unexpected error occurred",
+                    }
+                )
+                {
+                    StatusCode = 500,
+                };
+                context.ExceptionHandled = true;
+                break;
+        }
+    }
+}