Stream custom live channels using your own media
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using System.Linq;
using System.Threading;
using System.Threading.Channels;
using System.Threading.Tasks;
using ErsatzTV.Application.Playouts.Commands;
using ErsatzTV.Core;
using ErsatzTV.Core.Domain;
using ErsatzTV.Core.Interfaces.Repositories;
using LanguageExt;
using MediatR;
using static ErsatzTV.Application.ProgramSchedules.Mapper;
namespace ErsatzTV.Application.ProgramSchedules.Commands
{
public class AddProgramScheduleItemHandler : ProgramScheduleItemCommandBase, IRequestHandler<AddProgramScheduleItem,
Either<BaseError, ProgramScheduleItemViewModel>>
{
private readonly ChannelWriter<IBackgroundServiceRequest> _channel;
private readonly IProgramScheduleRepository _programScheduleRepository;
public AddProgramScheduleItemHandler(
IProgramScheduleRepository programScheduleRepository,
ChannelWriter<IBackgroundServiceRequest> channel)
: base(programScheduleRepository)
{
_programScheduleRepository = programScheduleRepository;
_channel = channel;
}
public Task<Either<BaseError, ProgramScheduleItemViewModel>> Handle(
AddProgramScheduleItem request,
CancellationToken cancellationToken) =>
Validate(request)
.MapT(programSchedule => PersistItem(request, programSchedule))
.Bind(v => v.ToEitherAsync());
private async Task<ProgramScheduleItemViewModel> PersistItem(
AddProgramScheduleItem request,
ProgramSchedule programSchedule)
{
int nextIndex = programSchedule.Items.Select(i => i.Index).DefaultIfEmpty(0).Max() + 1;
ProgramScheduleItem item = BuildItem(programSchedule, nextIndex, request);
programSchedule.Items.Add(item);
await _programScheduleRepository.Update(programSchedule);
// rebuild any playouts that use this schedule
foreach (Playout playout in programSchedule.Playouts)
{
await _channel.WriteAsync(new BuildPlayout(playout.Id, true));
}
return ProjectToViewModel(item);
}
private Task<Validation<BaseError, ProgramSchedule>> Validate(AddProgramScheduleItem request) =>
ProgramScheduleMustExist(request.ProgramScheduleId)
.BindT(programSchedule => PlayoutModeMustBeValid(request, programSchedule));
}
}