39 lines
1.5 KiB
C#
39 lines
1.5 KiB
C#
using ErrorOr;
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using Mediator;
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using Microsoft.EntityFrameworkCore;
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using Musify.Application.Albums.Responses;
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using Musify.Application.Contracts;
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using Musify.Application.Shared;
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using Musify.Application.Tracks.Responses;
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namespace Musify.Application.Albums;
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public record GetAlbumTracksQuery(
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Guid AlbumId,
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int PageNumber,
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int PageSize)
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: IQuery<ErrorOr<PaginatedResponse<TrackApplicationResponse>>>;
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public class GetAlbumTracksQueryHandler(IDatabase database)
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: IQueryHandler<GetAlbumTracksQuery, ErrorOr<PaginatedResponse<TrackApplicationResponse>>>
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{
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public async ValueTask<ErrorOr<PaginatedResponse<TrackApplicationResponse>>> Handle(GetAlbumTracksQuery request, CancellationToken cancellationToken)
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{
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var albumExists = await database.Albums
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.AsNoTracking()
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.Active()
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.AnyAsync(album => album.Id == request.AlbumId, cancellationToken);
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if (!albumExists)
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return AppErrors.NotFound("Album", request.AlbumId);
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return await database.AlbumHasTracks
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.AsNoTracking()
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.Where(albumTrack => albumTrack.AlbumId == request.AlbumId && albumTrack.Track.LifeCycleStatus == Domain.ValueObjects.LifeCycleStatus.Active)
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.OrderBy(albumTrack => albumTrack.TrackNumber)
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.ThenBy(albumTrack => albumTrack.Id)
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.Select(albumTrack => albumTrack.Track)
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.SelectResponse()
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.ToPaginatedAsync(new PageRequest(request.PageNumber, request.PageSize), cancellationToken);
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}
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}
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