64 lines
2.4 KiB
C#
64 lines
2.4 KiB
C#
using System;
|
|
using System.Threading;
|
|
using System.Threading.Tasks;
|
|
using ErsatzTV.Core;
|
|
using ErsatzTV.Core.Domain;
|
|
using ErsatzTV.Core.Interfaces.Repositories;
|
|
using LanguageExt;
|
|
using MediatR;
|
|
using Serilog;
|
|
|
|
namespace ErsatzTV.Application.Streaming.Queries
|
|
{
|
|
public class
|
|
GetHlsPlaylistByChannelNumberHandler : IRequestHandler<GetHlsPlaylistByChannelNumber, Either<BaseError, string>>
|
|
{
|
|
private readonly IChannelRepository _channelRepository;
|
|
private readonly IPlayoutRepository _playoutRepository;
|
|
|
|
public GetHlsPlaylistByChannelNumberHandler(
|
|
IChannelRepository channelRepository,
|
|
IPlayoutRepository playoutRepository)
|
|
{
|
|
_channelRepository = channelRepository;
|
|
_playoutRepository = playoutRepository;
|
|
}
|
|
|
|
public Task<Either<BaseError, string>> Handle(
|
|
GetHlsPlaylistByChannelNumber request,
|
|
CancellationToken cancellationToken) =>
|
|
ChannelMustExist(request)
|
|
.Map(v => v.ToEither<Channel>())
|
|
.BindT(channel => GetPlaylist(request, channel));
|
|
|
|
private async Task<Either<BaseError, string>> GetPlaylist(
|
|
GetHlsPlaylistByChannelNumber request,
|
|
Channel channel)
|
|
{
|
|
DateTimeOffset now = DateTimeOffset.Now;
|
|
Option<PlayoutItem> maybePlayoutItem = await _playoutRepository.GetPlayoutItem(channel.Id, now);
|
|
return maybePlayoutItem.Match<Either<BaseError, string>>(
|
|
playoutItem =>
|
|
{
|
|
double timeRemaining = Math.Abs((playoutItem.Finish - now).TotalSeconds);
|
|
return $@"#EXTM3U
|
|
#EXT-X-VERSION:3
|
|
#EXT-X-TARGETDURATION:18000
|
|
#EXTINF:{timeRemaining:F2},
|
|
{request.Scheme}://{request.Host}/ffmpeg/stream/{request.ChannelNumber}
|
|
";
|
|
},
|
|
() =>
|
|
{
|
|
// TODO: playlist for error stream
|
|
Log.Logger.Error("Unable to locate playout item for m3u8");
|
|
return BaseError.New($"Unable to locate playout item for channel {channel.Number}");
|
|
});
|
|
}
|
|
|
|
private async Task<Validation<BaseError, Channel>> ChannelMustExist(GetHlsPlaylistByChannelNumber request) =>
|
|
(await _channelRepository.GetByNumber(request.ChannelNumber))
|
|
.ToValidation<BaseError>($"Channel number {request.ChannelNumber} does not exist.");
|
|
}
|
|
}
|