Oneiro AspNetCore LanguageExt

Converts LanguageExt monads to AspNetCore's IResult for minimal APIs or IActionResult for controller based APIs.

Installation

dotnet add package Oneiro.AspNetCore.LanguageExt

Quick Reference

• Any monad that has a proper object will return a success code of 200 OK with a response body
• Any monad that returns Unit will return a success code of 204 No Content
• The Option<T> monad will either be a success of 200 or 204 and the none condition is converted to a 404 Not Found
  • Monad with nested Option<T> such as Fin<Option<T>> could return 200, 204, 404, or 500 as Fin<Option<T>> could be a success with an option of
    • Unit (204)
    • T (200)
    • None (404)
    • Error (500).
• The Try monad will return either a 200, 204, or 500
• The TryOption monad will return either a 200, 204, 404, or 500
• The Eff monad will return a 200, 204, or 500
• The Aff monad will return a 200, 204, or 500

Proper IEFT problem detail responses will be presented with the appropriate status code based on the exception that is contained within the Fin, Try, TryOption, Eff, and Aff monads.

Usage

LanguageExt monads can be converted to Action or IResult. The extensions functions can be used by importing Oneiro.

Quick Start

using Oneiro;
//. Other code

IResult result = Try(() => "Hello, World!").ToResult();

Minimal APIs

using static LanguageExt.Prelude;
using Oneiro;

interface IService { Option<string> GetMessage(); }

class MyService : IService {
    Option<string> GetMessage() => "Hello, World!";
}

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddTransient<IService, MyService>();

var app = builder.Build();

app.MapGet("/", (IService service) => service.GetMessage().ToResult());

app.Run();