53 lines
2.2 KiB
C#
53 lines
2.2 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 X.PagedList;
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using X.PagedList.EF;
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namespace Musify.Application.Albums;
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public record GetAlbumsByUserIdQuery(long UserId, int PageNumber, int PageSize)
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: IQuery<ErrorOr<PaginatedResponse<AlbumApplicationResponse>>>;
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public class GetAlbumsByUserIdQueryHandler(IDatabase database)
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: IQueryHandler<GetAlbumsByUserIdQuery, ErrorOr<PaginatedResponse<AlbumApplicationResponse>>>
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{
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public async ValueTask<ErrorOr<PaginatedResponse<AlbumApplicationResponse>>> Handle(GetAlbumsByUserIdQuery request, CancellationToken cancellationToken)
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{
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var userExists = await database.Users
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.AsNoTracking()
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.AnyAsync(user => user.Id == request.UserId, cancellationToken);
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if (!userExists)
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return Error.NotFound(description: $"User {request.UserId} not found");
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var albumsQuery = database.Albums
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.AsNoTracking()
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.Where(album => album.OwnerUserId == request.UserId);
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var totalCount = await albumsQuery.CountAsync(cancellationToken);
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var pagedEntities = await albumsQuery
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.OrderByDescending(album => album.CreatedAt)
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.Select(album => new
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{
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Album = album,
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TrackCount = album.AlbumTracks.Count,
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CoverTrackIds = album.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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.ToPagedListAsync(request.PageNumber, request.PageSize, totalCount, cancellationToken);
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var pagedAlbums = new StaticPagedList<AlbumApplicationResponse>(
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pagedEntities.Select(entry => AlbumApplicationResponse.FromEntity(entry.Album, entry.TrackCount, entry.CoverTrackIds)),
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pagedEntities.PageNumber, pagedEntities.PageSize, pagedEntities.TotalItemCount);
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return PaginatedResponse<AlbumApplicationResponse>.FromPagedList(pagedAlbums);
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}
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}
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