using System.Collections.Generic; using MediaBrowser.Controller.Entities; using MediaBrowser.Controller.Providers; using MediaBrowser.Model.Entities; namespace MediaBrowser.Providers.Books.Isbn; /// public class IsbnExternalUrlProvider : IExternalUrlProvider { /// public string Name => "ISBN"; /// public IEnumerable GetExternalUrls(BaseItem item) { if (item.TryGetProviderId("ISBN", out var externalId)) { if (item is Book) { yield return $"https://search.worldcat.org/search?q=bn:{externalId}"; } } } }