69 lines
2.1 KiB
C#
69 lines
2.1 KiB
C#
using LiteCqrs;
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using Microsoft.EntityFrameworkCore;
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using TeleWave.Application.Common.Interfaces;
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using TeleWave.Application.Common.Models;
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namespace TeleWave.Application.Library.Collections.GetCollection;
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public sealed class GetCollectionQueryHandler(IAppDbContext dbContext)
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: IQueryHandler<GetCollectionQuery, Result<CollectionDto>>
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{
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public async Task<Result<CollectionDto>> Handle(
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GetCollectionQuery query,
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CancellationToken cancellationToken
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)
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{
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var collection = await dbContext
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.Collections.AsNoTracking()
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.Include(c => c.Items)
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.FirstOrDefaultAsync(c => c.Id == query.Id, cancellationToken);
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if (collection is null)
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return Result.Failure<CollectionDto>(CollectionErrors.NotFound);
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var showIds = collection.Items.Select(i => i.ShowId).ToList();
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var shows = await dbContext
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.Shows.AsNoTracking()
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.Where(s => showIds.Contains(s.Id))
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.Select(s => new
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{
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s.Id,
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s.Name,
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s.Kind,
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s.Audience,
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s.Year,
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s.PosterImageId,
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EpisodeCount = s.Episodes.Count,
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})
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.ToDictionaryAsync(s => s.Id, cancellationToken);
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var items = collection
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.Items.OrderBy(i => i.Position)
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.Select(i =>
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{
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shows.TryGetValue(i.ShowId, out var show);
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return new CollectionItemDto(
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i.ShowId,
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i.Position,
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show?.Name ?? "—",
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show?.Kind ?? default,
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show?.Audience,
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show?.EpisodeCount ?? 0,
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show?.Year,
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show?.PosterImageId
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);
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})
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.ToList();
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return Result.Success(
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new CollectionDto(
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collection.Id,
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collection.Name,
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collection.Description,
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collection.PosterImageId,
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collection.CreatedAt,
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items
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)
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);
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}
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}
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