snapp-cli/Helpers/TypeRegistrar.cs

using Microsoft.Extensions.DependencyInjection;
using Spectre.Console.Cli;

namespace Snapp.Cli.Helpers;

public sealed class TypeRegistrar : ITypeRegistrar {
  private readonly IServiceCollection _builder;

  public TypeRegistrar(IServiceCollection builder) {
    _builder = builder;
  }

  public ITypeResolver Build() {
    return new TypeResolver(_builder.BuildServiceProvider());
  }

  public void Register(Type service, Type implementation) {
    _builder.AddSingleton(service, implementation);
  }

  public void RegisterInstance(Type service, object implementation) {
    _builder.AddSingleton(service, implementation);
  }

  public void RegisterLazy(Type service, Func<object> func) {
    if (func is null) {
      throw new ArgumentNullException(nameof(func));
    }

    _builder.AddSingleton(service, (provider) => func());
  }
}