Parse provider IDs from season and episode folder/file names

Season and episode directories/files can now include provider ID
attributes in their names (e.g. "Season 01 [tvdbid=22222]" or
"Show S01E01 [tmdbid=99999].mkv"), consistent with the existing
behavior for series folders.

Supported providers: imdbid, tvdbid, tvmazeid, tmdbid.

Adds TmdbSeasonExternalId and TmdbEpisodeExternalId so that
the TMDB season and episode IDs are surfaced in the metadata editor.

Seasons do not have their own IMDb IDs, so we don't support imdbid parsing
in SeasonResolver. Instead, generate IMDb season URLs via
ImdbExternalUrlProvider using the parent series' IMDb ID and the
season number, matching the IMDb URL format:
imdb.com/title/{seriesId}/episodes/?season={N}

Add tests for the ExternalUrlProviders.

2 files changed, 51 insertions, 0 deletions

diff --git a/Emby.Server.Implementations/Library/Resolvers/TV/EpisodeResolver.cs b/Emby.Server.Implementations/Library/Resolvers/TV/EpisodeResolver.cs
index 5fd23c9f50..85bf20cc2a 100644
--- a/Emby.Server.Implementations/Library/Resolvers/TV/EpisodeResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/TV/EpisodeResolver.cs
@@ -1,8 +1,10 @@
 #nullable disable
 
 using System;
+using System.IO;
 using System.Linq;
 using Emby.Naming.Common;
+using Emby.Server.Implementations.Library;
 using Jellyfin.Data.Enums;
 using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
@@ -81,10 +83,34 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
                     episode.ParentIndexNumber = 1;
                 }
 
+                SetProviderIdFromPath(episode, args.Path);
+
                 return episode;
             }
 
             return null;
         }
+
+        /// <summary>
+        /// Sets provider ids from the episode file name.
+        /// </summary>
+        /// <param name="item">The episode.</param>
+        /// <param name="path">The episode file path.</param>
+        private static void SetProviderIdFromPath(Episode item, string path)
+        {
+            var justName = Path.GetFileNameWithoutExtension(path.AsSpan());
+
+            var imdbId = justName.GetAttributeValue("imdbid");
+            item.TrySetProviderId(MetadataProvider.Imdb, imdbId);
+
+            var tvdbId = justName.GetAttributeValue("tvdbid");
+            item.TrySetProviderId(MetadataProvider.Tvdb, tvdbId);
+
+            var tvmazeId = justName.GetAttributeValue("tvmazeid");
+            item.TrySetProviderId(MetadataProvider.TvMaze, tvmazeId);
+
+            var tmdbId = justName.GetAttributeValue("tmdbid");
+            item.TrySetProviderId(MetadataProvider.Tmdb, tmdbId);
+        }
     }
 }
diff --git a/Emby.Server.Implementations/Library/Resolvers/TV/SeasonResolver.cs b/Emby.Server.Implementations/Library/Resolvers/TV/SeasonResolver.cs
index 6cb63a28a2..ad041086e5 100644
--- a/Emby.Server.Implementations/Library/Resolvers/TV/SeasonResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/TV/SeasonResolver.cs
@@ -1,10 +1,14 @@
 #nullable disable
 
+using System;
 using System.Globalization;
+using System.IO;
 using Emby.Naming.Common;
 using Emby.Naming.TV;
+using Emby.Server.Implementations.Library;
 using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
+using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.Globalization;
 using Microsoft.Extensions.Logging;
 
@@ -91,10 +95,31 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
                             args.LibraryOptions.PreferredMetadataLanguage);
                 }
 
+                SetProviderIdFromPath(season, path);
+
                 return season;
             }
 
             return null;
         }
+
+        /// <summary>
+        /// Sets provider ids from the season folder name.
+        /// </summary>
+        /// <param name="item">The season.</param>
+        /// <param name="path">The season folder path.</param>
+        private static void SetProviderIdFromPath(Season item, string path)
+        {
+            var justName = Path.GetFileName(path.AsSpan());
+
+            var tvdbId = justName.GetAttributeValue("tvdbid");
+            item.TrySetProviderId(MetadataProvider.Tvdb, tvdbId);
+
+            var tvmazeId = justName.GetAttributeValue("tvmazeid");
+            item.TrySetProviderId(MetadataProvider.TvMaze, tvmazeId);
+
+            var tmdbId = justName.GetAttributeValue("tmdbid");
+            item.TrySetProviderId(MetadataProvider.Tmdb, tmdbId);
+        }
     }
 }