stream-cinema/CinemaJellyfin/CinemaVideoExtensions.cs

using MediaBrowser.Controller.Entities;
using MediaBrowser.Model.Dto;

namespace Jellyfin.Plugin.Cinema;

static class CinemaVideoExtensions
{
  public static IEnumerable<(BaseItem Item, MediaSourceType MediaSourceType)>? VideoGetAllItemsForMediaSources<T>(this T @this)
    where T : Video, new()
  {
    // Non-primary version items use default implementation
    if (!string.IsNullOrEmpty(@this.PrimaryVersionId))
    {
      return null; // means call base.GetAllItemsForMediaSources
    }

    // Our media source manager must be present
    CinemaMediaSourceManager? msm;
    if (!CinemaMediaSourceManager.TryGetInstance(out msm))
      return Enumerable.Empty<(BaseItem Item, MediaSourceType MediaSourceType)>();

    // Generate item for each CinemaLib.API.Stream. Obtaining the file sub-streams themselves
    // is intercepted in CinemaMediaSourceManager.GetMediaStreams
    return GetAllItemsForMediaSourcesEnumerate(@this, msm);
  }

  private static IEnumerable<(BaseItem Item, MediaSourceType MediaSourceType)> GetAllItemsForMediaSourcesEnumerate<T>(T @this, CinemaMediaSourceManager msm)
    where T : Video, new()
  {
    IEnumerable<T>? versions = msm.GetVideoVersions(@this, default).GetAwaiter().GetResult();
    if (versions != null)
      foreach (T i in versions)
        yield return (i, MediaSourceType.Grouping);
  }

  public static List<MediaSourceInfo> VideoGetMediaSources<T>(this T @this, bool enablePathSubstitution)
    where T : Video, new()
  {
    List<MediaSourceInfo> result = new List<MediaSourceInfo>();
    
    // Our media source manager must be present
    CinemaMediaSourceManager? msm;
    if (!CinemaMediaSourceManager.TryGetInstance(out msm))
      return result;
 
     var a = msm.GetVersionInfo(@this, default).GetAwaiter().GetResult();
     if (a != null)
      result.Add(a);

    return result;
  }
}