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72 lines
3.0 KiB
72 lines
3.0 KiB
using System.Threading; |
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using System.Threading.Channels; |
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using System.Threading.Tasks; |
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using ErsatzTV.Application.Playouts.Commands; |
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using ErsatzTV.Core; |
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using ErsatzTV.Core.Domain; |
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using ErsatzTV.Core.Interfaces.Repositories; |
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using LanguageExt; |
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using MediatR; |
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using static ErsatzTV.Application.ProgramSchedules.Mapper; |
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namespace ErsatzTV.Application.ProgramSchedules.Commands |
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{ |
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public class |
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UpdateProgramScheduleHandler : IRequestHandler<UpdateProgramSchedule, |
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Either<BaseError, ProgramScheduleViewModel>> |
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{ |
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private readonly ChannelWriter<IBackgroundServiceRequest> _channel; |
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private readonly IProgramScheduleRepository _programScheduleRepository; |
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public UpdateProgramScheduleHandler( |
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IProgramScheduleRepository programScheduleRepository, |
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ChannelWriter<IBackgroundServiceRequest> channel) |
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{ |
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_programScheduleRepository = programScheduleRepository; |
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_channel = channel; |
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} |
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public Task<Either<BaseError, ProgramScheduleViewModel>> Handle( |
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UpdateProgramSchedule request, |
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CancellationToken cancellationToken) => |
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Validate(request) |
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.MapT(c => ApplyUpdateRequest(c, request)) |
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.Bind(v => v.ToEitherAsync()); |
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private async Task<ProgramScheduleViewModel> ApplyUpdateRequest( |
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ProgramSchedule programSchedule, |
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UpdateProgramSchedule update) |
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{ |
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// we only need to rebuild playouts if the playback order has been modified |
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bool needToRebuildPlayout = |
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programSchedule.MediaCollectionPlaybackOrder != update.MediaCollectionPlaybackOrder; |
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programSchedule.Name = update.Name; |
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programSchedule.MediaCollectionPlaybackOrder = update.MediaCollectionPlaybackOrder; |
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await _programScheduleRepository.Update(programSchedule); |
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if (needToRebuildPlayout) |
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{ |
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foreach (Playout playout in programSchedule.Playouts) |
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{ |
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await _channel.WriteAsync(new BuildPlayout(playout.Id, true)); |
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} |
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} |
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return ProjectToViewModel(programSchedule); |
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} |
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private async Task<Validation<BaseError, ProgramSchedule>> Validate(UpdateProgramSchedule request) => |
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(await ProgramScheduleMustExist(request), ValidateName(request)) |
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.Apply((programScheduleToUpdate, _) => programScheduleToUpdate); |
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private async Task<Validation<BaseError, ProgramSchedule>> ProgramScheduleMustExist( |
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UpdateProgramSchedule updateProgramSchedule) => |
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(await _programScheduleRepository.GetWithPlayouts(updateProgramSchedule.ProgramScheduleId)) |
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.ToValidation<BaseError>("ProgramSchedule does not exist."); |
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private Validation<BaseError, string> ValidateName(UpdateProgramSchedule updateProgramSchedule) => |
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updateProgramSchedule.NotEmpty(c => c.Name) |
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.Bind(_ => updateProgramSchedule.NotLongerThan(50)(c => c.Name)); |
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} |
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}
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