39 lines
1.6 KiB
C#
39 lines
1.6 KiB
C#
using ErsatzTV.Core;
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using ErsatzTV.Core.Domain.Filler;
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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.Filler;
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public class DeleteFillerPresetHandler : IRequestHandler<DeleteFillerPreset, Either<BaseError, Unit>>
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{
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private readonly IDbContextFactory<TvContext> _dbContextFactory;
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public DeleteFillerPresetHandler(IDbContextFactory<TvContext> dbContextFactory) =>
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_dbContextFactory = dbContextFactory;
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public async Task<Either<BaseError, Unit>> Handle(
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DeleteFillerPreset 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, FillerPreset> validation = await FillerPresetMustExist(dbContext, request, cancellationToken);
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return await validation.Apply(ps => DoDeletion(dbContext, ps));
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}
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private static Task<Unit> DoDeletion(TvContext dbContext, FillerPreset fillerPreset)
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{
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dbContext.FillerPresets.Remove(fillerPreset);
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return dbContext.SaveChangesAsync().ToUnit();
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}
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private static Task<Validation<BaseError, FillerPreset>> FillerPresetMustExist(
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TvContext dbContext,
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DeleteFillerPreset request,
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CancellationToken cancellationToken) =>
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dbContext.FillerPresets
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.SelectOneAsync(fp => fp.Id, ps => ps.Id == request.FillerPresetId, cancellationToken)
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.Map(o => o.ToValidation<BaseError>($"FillerPreset {request.FillerPresetId} does not exist."));
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}
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