IStatusCodeMapper

FloppyShelf.Problemize.Interfaces

public interface IStatusCodeMapper

int GetStatusCode(Exception exception)

using FloppyShelf.Problemize.Interfaces;

public class CustomStatusCodeMapper : IStatusCodeMapper
{
    public int GetStatusCode(Exception exception)
    {
        return exception switch
        {
            // Custom exceptions
            ProductNotFoundException => StatusCodes.Status404NotFound,
            InsufficientStockException => StatusCodes.Status409Conflict,
            PaymentFailedException => StatusCodes.Status402PaymentRequired,
            
            // Business validation errors
            BusinessRuleException => StatusCodes.Status422UnprocessableEntity,
            
            // Authentication/Authorization
            InvalidTokenException => StatusCodes.Status401Unauthorized,
            InsufficientPermissionsException => StatusCodes.Status403Forbidden,
            
            // Fallback to default
            _ => StatusCodes.Status500InternalServerError
        };
    }
}

var builder = WebApplication.CreateBuilder(args);

// Register with custom mapper
builder.Services.UseExceptionHandling(new CustomStatusCodeMapper());

var app = builder.Build();
app.UseExceptionHandling();