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61 lines
2.4 KiB
61 lines
2.4 KiB
using System.Linq; |
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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 AddProgramScheduleItemHandler : ProgramScheduleItemCommandBase, IRequestHandler<AddProgramScheduleItem, |
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Either<BaseError, ProgramScheduleItemViewModel>> |
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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 AddProgramScheduleItemHandler( |
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IProgramScheduleRepository programScheduleRepository, |
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ChannelWriter<IBackgroundServiceRequest> channel) |
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: base(programScheduleRepository) |
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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, ProgramScheduleItemViewModel>> Handle( |
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AddProgramScheduleItem request, |
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CancellationToken cancellationToken) => |
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Validate(request) |
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.MapT(programSchedule => PersistItem(request, programSchedule)) |
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.Bind(v => v.ToEitherAsync()); |
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private async Task<ProgramScheduleItemViewModel> PersistItem( |
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AddProgramScheduleItem request, |
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ProgramSchedule programSchedule) |
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{ |
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int nextIndex = programSchedule.Items.Select(i => i.Index).DefaultIfEmpty(0).Max() + 1; |
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ProgramScheduleItem item = BuildItem(programSchedule, nextIndex, request); |
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programSchedule.Items.Add(item); |
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await _programScheduleRepository.Update(programSchedule); |
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// rebuild any playouts that use this schedule |
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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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return ProjectToViewModel(item); |
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} |
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private Task<Validation<BaseError, ProgramSchedule>> Validate(AddProgramScheduleItem request) => |
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ProgramScheduleMustExist(request.ProgramScheduleId) |
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.BindT(programSchedule => PlayoutModeMustBeValid(request, programSchedule)); |
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} |
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}
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