53 lines
2.0 KiB
C#
53 lines
2.0 KiB
C#
using ErsatzTV.Core;
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using ErsatzTV.Core.Domain;
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using ErsatzTV.Core.Interfaces.Search;
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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 DeleteMultiCollectionHandler : IRequestHandler<DeleteMultiCollection, Either<BaseError, Unit>>
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{
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private readonly IDbContextFactory<TvContext> _dbContextFactory;
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private readonly ISearchTargets _searchTargets;
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public DeleteMultiCollectionHandler(IDbContextFactory<TvContext> dbContextFactory, ISearchTargets searchTargets)
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{
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_dbContextFactory = dbContextFactory;
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_searchTargets = searchTargets;
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}
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public async Task<Either<BaseError, Unit>> Handle(
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DeleteMultiCollection 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, MultiCollection> validation = await MultiCollectionMustExist(
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dbContext,
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request,
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cancellationToken);
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return await validation.Apply(c => DoDeletion(dbContext, c, cancellationToken));
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}
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private async Task<Unit> DoDeletion(
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TvContext dbContext,
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MultiCollection multiCollection,
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CancellationToken cancellationToken)
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{
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dbContext.MultiCollections.Remove(multiCollection);
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await dbContext.SaveChangesAsync(cancellationToken);
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_searchTargets.SearchTargetsChanged();
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return Unit.Default;
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}
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private static Task<Validation<BaseError, MultiCollection>> MultiCollectionMustExist(
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TvContext dbContext,
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DeleteMultiCollection request,
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CancellationToken cancellationToken) =>
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dbContext.MultiCollections
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.SelectOneAsync(c => c.Id, c => c.Id == request.MultiCollectionId, cancellationToken)
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.Map(o => o.ToValidation<BaseError>($"MultiCollection {request.MultiCollectionId} does not exist."));
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}
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