using System.Threading;
using System.Threading.Tasks;
using ErsatzTV.Core.Interfaces.Repositories;
using LanguageExt;
using MediatR;
using static ErsatzTV.Application.Channels.Mapper;

namespace ErsatzTV.Application.Channels.Queries
{
    public class GetChannelByIdHandler : IRequestHandler<GetChannelById, Option<ChannelViewModel>>
    {
        private readonly IChannelRepository _channelRepository;

        public GetChannelByIdHandler(IChannelRepository channelRepository) => _channelRepository = channelRepository;

        public Task<Option<ChannelViewModel>> Handle(GetChannelById request, CancellationToken cancellationToken) =>
            _channelRepository.Get(request.Id)
                .MapT(ProjectToViewModel);
    }
}