82 lines
3.2 KiB
C#
82 lines
3.2 KiB
C#
using System.Threading.Channels;
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using ErsatzTV.Application.Playouts;
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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 ErsatzTV.Core.Scheduling;
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using ErsatzTV.Infrastructure.Data;
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using ErsatzTV.Infrastructure.Extensions;
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using Microsoft.EntityFrameworkCore;
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namespace ErsatzTV.Application.MediaCollections;
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public class UpdateCollectionCustomOrderHandler : IRequestHandler<UpdateCollectionCustomOrder, Either<BaseError, Unit>>
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{
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private readonly ChannelWriter<IBackgroundServiceRequest> _channel;
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private readonly IDbContextFactory<TvContext> _dbContextFactory;
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private readonly IMediaCollectionRepository _mediaCollectionRepository;
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public UpdateCollectionCustomOrderHandler(
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IDbContextFactory<TvContext> dbContextFactory,
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IMediaCollectionRepository mediaCollectionRepository,
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ChannelWriter<IBackgroundServiceRequest> channel)
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{
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_dbContextFactory = dbContextFactory;
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_mediaCollectionRepository = mediaCollectionRepository;
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_channel = channel;
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}
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public async Task<Either<BaseError, Unit>> Handle(
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UpdateCollectionCustomOrder request,
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CancellationToken cancellationToken)
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{
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await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync(cancellationToken);
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Validation<BaseError, Collection> validation = await Validate(dbContext, request, cancellationToken);
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return await validation.Apply(c => ApplyUpdateRequest(dbContext, c, request));
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}
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private async Task<Unit> ApplyUpdateRequest(
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TvContext dbContext,
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Collection c,
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UpdateCollectionCustomOrder request)
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{
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foreach (MediaItemCustomOrder updateItem in request.MediaItemCustomOrders)
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{
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Option<CollectionItem> maybeCollectionItem = c.CollectionItems
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.FirstOrDefault(ci => ci.MediaItemId == updateItem.MediaItemId);
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foreach (CollectionItem collectionItem in maybeCollectionItem)
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{
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collectionItem.CustomIndex = updateItem.CustomIndex;
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}
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}
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if (await dbContext.SaveChangesAsync() > 0)
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{
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// refresh all playouts that use this collection
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foreach (int playoutId in await _mediaCollectionRepository
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.PlayoutIdsUsingCollection(request.CollectionId))
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{
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await _channel.WriteAsync(new BuildPlayout(playoutId, PlayoutBuildMode.Refresh));
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}
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}
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return Unit.Default;
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}
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private static Task<Validation<BaseError, Collection>> Validate(
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TvContext dbContext,
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UpdateCollectionCustomOrder request,
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CancellationToken cancellationToken) =>
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CollectionMustExist(dbContext, request, cancellationToken);
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private static Task<Validation<BaseError, Collection>> CollectionMustExist(
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TvContext dbContext,
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UpdateCollectionCustomOrder request,
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CancellationToken cancellationToken) =>
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dbContext.Collections
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.Include(c => c.CollectionItems)
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.SelectOneAsync(c => c.Id, c => c.Id == request.CollectionId, cancellationToken)
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.Map(o => o.ToValidation<BaseError>("Collection does not exist."));
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}
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