HAL.AspNetCore 1.0.0

HAL

This project aims to bring a simple to use implementation of the Hypertext Application language.

Specification

• The formal specification is published as in IETF draft and can be found under https://tools.ietf.org/html/draft-kelly-json-hal-08.
• A more informal documentation can be found under http://stateless.co/hal_specification.html.

Usage

The project consists of two packages

1. HAL.Common which contains the IResource, IResource<T> and ILink implementations and the converters needed for serialization with System.Text.Json.
2. HAL.AspNetCore adds IResourceFactory and ILinkFactory which can be used in your controllers to easily generate resources from your models.

In Startup.cs

public void ConfigureServices(IServiceCollection services)
{
   services
       .AddControllers() // or .AddMvc()
       .AddJsonOptions(o =>
       {
           o.JsonSerializerOptions.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingDefault; // not neccessary, but creates a much nicer output
       });
   services.AddHAL();
}

In your controller

[Route("[controller]")]
[ApiController]
public class MyController : ControllerBase
{
   private readonly IResourceFactory _resourceFactory;

   public Table(IResourceFactory resourceFactory)
   {
       _resourceFactory = resourceFactory ?? throw new ArgumentNullException(nameof(resourceFactory));
   }

   [HttpGet]
   public ActionResult<IResource> Get()
   {
       var models = new[]
       {
           new MyModelListDto {Id = 1, Name = "Test1"},
           new MyModelListDto {Id = 2, Name = "Test2"},
       };

       var result = _resourceFactory.CreateForListEndpoint(models, m => m.Id);

       return Ok(result);
   }

   [HttpGet("{id}")]
   public ActionResult<IResource<ModelFullDto>> Get(int id)
   {
       var model = new ModelFullDto { Id = id, Name = $"Test{id}", Description = "Very important!" };

       var result = _resourceFactory.CreateForGetEndpoint(model);

       return Ok(result);
   }

   // PUT, POST, ...
}