Built in Codes

Bult-in codes

Code	HTTP Code
INV	400
NTFND	404
UNAUTH	401
FRBD	403
CNFLT	409
LCKD	423
UNEXP	500
AGGR	-

Codes support inheritance:
INV.USER_NAME by default, will be converted to HTTP 400

Adding custom factory methods

Built in codes has appropriate static methods in CodedResult, CodedFailure and CodedException, like: CodedResult.Invalid(), CodedFailure.Invalid(), CodedException.Invalid()

To add custom factory method to CodedFailure and CodedResult you might create extension methods

AppCodeFailures.cs

namespace Webinex.Coded;

public static class ThisCodedFailureExtensions
{
    public static CodedFailure<string> UserExists(this ThisCodedFailure _, string email)
    {
        return new CodedFailure<string>(Code.INVALID.Child("USER.EXISTS"), email);
    }
}

And use it

UserService.cs

public class UserService
{
    private readonly IUserRepository _userRepository;

    // ...

    public async Task AddAsync(User user)
    {
        if (await _userRepository.ExistsAsync(user.Email))
            throw CodedFailure.This.UserExists(user.Email).Throw();

        // ...
    }
}

Adding custom base code

Startup.cs

services
    .AddCodedFailures(x => x
      .AddCode("NT_IMPL", HttpStatusCode.NotImplemented));

NT_IMPL would support inheritance. NT_IMPL.ADD_USER would be conveted to HttpStatusCode.NotImplemented.

Override status code inheritance

Startup.cs

services
    .AddCodedFailures(x => x
      .AddCode("INV.CONFLICT", HttpStatusCode.Conflict));

INV.CONFLICT would support inheritance. INV.CONFLICT.MODIFICATION would be conveted to HttpStatusCode.Conflict.