39 lines
1.4 KiB
C#
39 lines
1.4 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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namespace Musify.Application.Albums
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{
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public record GetAlbumByIdQuery(Guid Id)
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: IQuery<ErrorOr<AlbumApplicationResponse>>;
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public class GetAlbumByIdQueryHandler(IDatabase database)
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: IQueryHandler<GetAlbumByIdQuery, ErrorOr<AlbumApplicationResponse>>
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{
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public async ValueTask<ErrorOr<AlbumApplicationResponse>> Handle(GetAlbumByIdQuery request, CancellationToken cancellationToken)
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{
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var album = await database.UserAlbums
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.AsNoTracking()
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.Where(a => a.Id == request.Id)
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.Select(a => new
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{
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Album = a,
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TrackCount = a.AlbumTracks.Count,
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CoverTrackIds = a.AlbumTracks
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.OrderBy(albumTrack => albumTrack.TrackNumber)
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.Take(AlbumApplicationResponse.CoverTrackCount)
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.Select(albumTrack => albumTrack.TrackId)
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.ToList()
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})
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.SingleOrDefaultAsync(cancellationToken);
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if (album is null)
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return Error.NotFound();
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return AlbumApplicationResponse.FromEntity(album.Album, album.TrackCount, album.CoverTrackIds);
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}
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}
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}
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