From 2789532aa88ccc899ff8497537642e1d78b31ef5 Mon Sep 17 00:00:00 2001
From: Shadowghost <Ghost_of_Stone@web.de>
Date: Sat, 31 Jan 2026 19:19:26 +0100
Subject: Optimize Validator and Filter Performance

---
 Jellyfin.Api/Controllers/FilterController.cs | 44 ++++++----------------------
 1 file changed, 9 insertions(+), 35 deletions(-)

(limited to 'Jellyfin.Api/Controllers/FilterController.cs')

diff --git a/Jellyfin.Api/Controllers/FilterController.cs b/Jellyfin.Api/Controllers/FilterController.cs
index 3f9aa93a64..5ad127ad8c 100644
--- a/Jellyfin.Api/Controllers/FilterController.cs
+++ b/Jellyfin.Api/Controllers/FilterController.cs
@@ -68,53 +68,27 @@ public class FilterController : BaseJellyfinApiController
             item = _libraryManager.GetParentItem(parentId, user?.Id);
         }
 
-        var query = new InternalItemsQuery
+        if (item is not Folder folder)
+        {
+            return new QueryFiltersLegacy();
+        }
+
+        var query = new InternalItemsQuery(user)
         {
-            User = user,
             MediaTypes = mediaTypes,
             IncludeItemTypes = includeItemTypes,
             Recursive = true,
             EnableTotalRecordCount = false,
+            AncestorIds = [folder.Id],
             DtoOptions = new DtoOptions
             {
-                Fields = new[] { ItemFields.Genres, ItemFields.Tags },
+                Fields = [],
                 EnableImages = false,
                 EnableUserData = false
             }
         };
 
-        if (item is not Folder folder)
-        {
-            return new QueryFiltersLegacy();
-        }
-
-        var itemList = folder.GetItemList(query);
-        return new QueryFiltersLegacy
-        {
-            Years = itemList.Select(i => i.ProductionYear ?? -1)
-                .Where(i => i > 0)
-                .Distinct()
-                .Order()
-                .ToArray(),
-
-            Genres = itemList.SelectMany(i => i.Genres)
-                .DistinctNames()
-                .Order()
-                .ToArray(),
-
-            Tags = itemList
-                .SelectMany(i => i.Tags)
-                .Distinct(StringComparer.OrdinalIgnoreCase)
-                .Order()
-                .ToArray(),
-
-            OfficialRatings = itemList
-                .Select(i => i.OfficialRating)
-                .Where(i => !string.IsNullOrWhiteSpace(i))
-                .Distinct(StringComparer.OrdinalIgnoreCase)
-                .Order()
-                .ToArray()
-        };
+        return _libraryManager.GetQueryFiltersLegacy(query);
     }
 
     /// <summary>
-- 
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