Fix GetBaseItemDto to return related item counts via SQL count

For API call /Items/{item id} GetBaseItemDto will return the counts of related items e.g. artists, albums, songs.  GetBaseItemDto currently does this by calling GetTaggedItems which retrieves the objects into memory to count them.  Replace with SQL count.

Fixes:
This should be an improvement for any large libraries, but especially large music libraries.  Example:

Request Library -> Genres -> any very popular genre in your large library, e.g. Classical
Number of albums = 1552, songs = 23515, ...

- Before change: Try to retrieve 1552 albums, 23515 songs, ... in memory, API never returns, database on fire
- After change: API returns in 367ms and Genre view opens with 200 albums in 2 seconds

I verified the numbers returned are correct but note that there is a bug somewhere else in Jellyfin that is setting TopParentId to NULL for a large portion of my MusicArtists, which causes them to not be counted by the existing GetCount().  This is not related to this change, also happens with the existing code, and does not seem to affect the Web UI.

Includes Cory's changes in:
- https://github.com/jellyfin/jellyfin/pull/14610#issuecomment-3172211468
- https://github.com/jellyfin/jellyfin/pull/14610#issuecomment-3172239154

1 files changed, 37 insertions, 0 deletions

diff --git a/MediaBrowser.Controller/Entities/Studio.cs b/MediaBrowser.Controller/Entities/Studio.cs
index 9103b09a9..a44b32d85 100644
--- a/MediaBrowser.Controller/Entities/Studio.cs
+++ b/MediaBrowser.Controller/Entities/Studio.cs
@@ -5,6 +5,7 @@
 using System;
 using System.Collections.Generic;
 using System.Text.Json.Serialization;
+using Jellyfin.Data.Enums;
 using Jellyfin.Extensions;
 using Microsoft.Extensions.Logging;
 
@@ -71,6 +72,42 @@ namespace MediaBrowser.Controller.Entities
             return LibraryManager.GetItemList(query);
         }
 
+        public TaggedItemCounts GetTaggedItemCounts(InternalItemsQuery query)
+        {
+            query.StudioIds = [Id];
+
+            var counts = new TaggedItemCounts();
+
+            query.IncludeItemTypes = [BaseItemKind.MusicAlbum];
+            counts.AlbumCount = LibraryManager.GetCount(query);
+
+            query.IncludeItemTypes = [BaseItemKind.MusicArtist];
+            counts.ArtistCount = LibraryManager.GetCount(query);
+
+            query.IncludeItemTypes = [BaseItemKind.Episode];
+            counts.EpisodeCount = LibraryManager.GetCount(query);
+
+            query.IncludeItemTypes = [BaseItemKind.Movie];
+            counts.MovieCount = LibraryManager.GetCount(query);
+
+            query.IncludeItemTypes = [BaseItemKind.MusicVideo];
+            counts.MusicVideoCount = LibraryManager.GetCount(query);
+
+            query.IncludeItemTypes = [BaseItemKind.LiveTvProgram];
+            counts.ProgramCount = LibraryManager.GetCount(query);
+
+            query.IncludeItemTypes = [BaseItemKind.Series];
+            counts.SeriesCount = LibraryManager.GetCount(query);
+
+            query.IncludeItemTypes = [BaseItemKind.Audio];
+            counts.SongCount = LibraryManager.GetCount(query);
+
+            query.IncludeItemTypes = [BaseItemKind.Trailer];
+            counts.TrailerCount = LibraryManager.GetCount(query);
+
+            return counts;
+        }
+
         public static string GetPath(string name)
         {
             return GetPath(name, true);