Blacker.MangaScraper.Recent.RecentMangaScraper.GetMangas C# (CSharp) Метод

        private IEnumerable<RecentMangaRecord> GetMangas(bool force)
        {
            IEnumerable<RecentMangaRecord> mangas;

            lock (_syncRoot)
            {
                if (force || _mangaRecords == null || ((mangas = _mangaRecords.Target as IEnumerable<RecentMangaRecord>) == null))
                {
                    var cutoffDate = DateTime.UtcNow.AddDays(-Properties.Settings.Default.RecentMangaDaysNum);

                    mangas = ServiceLocator.Instance.GetService<ILibraryManager>()
                                           .GetRecentlyDownloadedMangas(cutoffDate)
                                           .Select(mr => new RecentMangaRecord(mr))
                                           .Where(rmr => rmr.ScraperInstance != null)
                                           .ToList();

                    _mangaRecords = new WeakReference(mangas);
                }
            }

            return mangas;
        }