using System;
using System.Threading;
using System.Threading.Tasks;
using HN.Domain;
using MediatR;

namespace HN.Application
{

  public class AddLinkCommandHandler : IRequestHandler<AddLinkCommand, Guid>
  {
    private readonly ILinkRepository _repository;
    private readonly IExecutingUserProvider _executingUserProvider;

    public AddLinkCommandHandler(ILinkRepository repository, IExecutingUserProvider executingUserProvider)
    {
      _repository = repository;
      _executingUserProvider = executingUserProvider;
    }

    public async Task<Guid> Handle(AddLinkCommand request, CancellationToken cancellationToken)
    {
      var link = Link.FromUrl(_executingUserProvider.GetCurrentUserId(), request.Url);

      await this._repository.AddAsync(link);

      return link.Id;
    }
  }

}