ErsatzTV/ErsatzTV.Application/MediaSources/Commands/TryCompletePlexPinFlowHandler.cs

using System;
using System.Threading;
using System.Threading.Channels;
using System.Threading.Tasks;
using ErsatzTV.Core;
using ErsatzTV.Core.Interfaces.Plex;
using LanguageExt;
using MediatR;

namespace ErsatzTV.Application.MediaSources.Commands
{
    public class TryCompletePlexPinFlowHandler : IRequestHandler<TryCompletePlexPinFlow, Either<BaseError, bool>>
    {
        private readonly ChannelWriter<IPlexBackgroundServiceRequest> _channel;
        private readonly IPlexTvApiClient _plexTvApiClient;

        public TryCompletePlexPinFlowHandler(
            IPlexTvApiClient plexTvApiClient,
            ChannelWriter<IPlexBackgroundServiceRequest> channel)
        {
            _plexTvApiClient = plexTvApiClient;
            _channel = channel;
        }

        public async Task<Either<BaseError, bool>>
            Handle(TryCompletePlexPinFlow request, CancellationToken cancellationToken)
        {
            var cts = new CancellationTokenSource(TimeSpan.FromMinutes(2));
            CancellationToken token = cts.Token;
            while (!token.IsCancellationRequested)
            {
                bool result = await _plexTvApiClient.TryCompletePinFlow(request.AuthPin);
                if (result)
                {
                    await _channel.WriteAsync(new SynchronizePlexMediaSources(), cancellationToken);
                    return true;
                }

                await Task.Delay(TimeSpan.FromSeconds(1), token);
            }

            return false;
        }
    }
}