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42 lines
1.7 KiB
42 lines
1.7 KiB
using System.Threading; |
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using System.Threading.Tasks; |
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using ErsatzTV.Core; |
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using ErsatzTV.Core.Domain; |
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using ErsatzTV.Infrastructure.Data; |
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using ErsatzTV.Infrastructure.Extensions; |
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using LanguageExt; |
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using Microsoft.EntityFrameworkCore; |
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namespace ErsatzTV.Application.MediaCollections.Commands |
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{ |
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public class DeleteSmartCollectionHandler : MediatR.IRequestHandler<DeleteSmartCollection, Either<BaseError, Unit>> |
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{ |
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private readonly IDbContextFactory<TvContext> _dbContextFactory; |
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public DeleteSmartCollectionHandler(IDbContextFactory<TvContext> dbContextFactory) => |
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_dbContextFactory = dbContextFactory; |
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public async Task<Either<BaseError, Unit>> Handle( |
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DeleteSmartCollection request, |
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CancellationToken cancellationToken) |
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{ |
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await using TvContext dbContext = _dbContextFactory.CreateDbContext(); |
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Validation<BaseError, SmartCollection> validation = await SmartCollectionMustExist(dbContext, request); |
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return await validation.Apply(c => DoDeletion(dbContext, c)); |
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} |
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private static Task<Unit> DoDeletion(TvContext dbContext, SmartCollection smartCollection) |
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{ |
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dbContext.SmartCollections.Remove(smartCollection); |
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return dbContext.SaveChangesAsync().ToUnit(); |
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} |
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private static Task<Validation<BaseError, SmartCollection>> SmartCollectionMustExist( |
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TvContext dbContext, |
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DeleteSmartCollection request) => |
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dbContext.SmartCollections |
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.SelectOneAsync(c => c.Id, c => c.Id == request.SmartCollectionId) |
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.Map(o => o.ToValidation<BaseError>($"SmartCollection {request.SmartCollectionId} does not exist.")); |
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} |
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}
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