jellyfin/MediaBrowser.Providers/Books/BookMetadataService.cs

using MediaBrowser.Common.IO;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using MediaBrowser.Providers.Manager;
using System.Collections.Generic;

namespace MediaBrowser.Providers.Books
{
    public class BookMetadataService : MetadataService<Book, BookInfo>
    {
        public BookMetadataService(IServerConfigurationManager serverConfigurationManager, ILogger logger, IProviderManager providerManager, IProviderRepository providerRepo, IFileSystem fileSystem, IUserDataManager userDataManager, ILibraryManager libraryManager) : base(serverConfigurationManager, logger, providerManager, providerRepo, fileSystem, userDataManager, libraryManager)
        {
        }

        protected override void MergeData(MetadataResult<Book> source, MetadataResult<Book> target, List<MetadataFields> lockedFields, bool replaceData, bool mergeMetadataSettings)
        {
            ProviderUtils.MergeBaseItemData(source, target, lockedFields, replaceData, mergeMetadataSettings);

            if (replaceData || string.IsNullOrEmpty(target.Item.SeriesName))
            {
                target.Item.SeriesName = source.Item.SeriesName;
            }
        }
    }
}