Merge pull request #17576 from obiwantoby/perf/batch-mediasourcecount-dto

Bugfix: #17547 | Batching MediaSourceCount into one call

1 files changed, 9 insertions, 0 deletions

diff --git a/MediaBrowser.Controller/Persistence/ILinkedChildrenService.cs b/MediaBrowser.Controller/Persistence/ILinkedChildrenService.cs
index a4614fc125..79c29410e4 100644
--- a/MediaBrowser.Controller/Persistence/ILinkedChildrenService.cs
+++ b/MediaBrowser.Controller/Persistence/ILinkedChildrenService.cs
@@ -20,6 +20,15 @@ public interface ILinkedChildrenService
     IReadOnlyList<Guid> GetLinkedChildrenIds(Guid parentId, int? childType = null);
 
     /// <summary>
+    /// Gets, in a single query, the subset of the supplied items that own at least one alternate
+    /// version (local or linked). Items absent from the result have no alternate versions, so their
+    /// media source count is one.
+    /// </summary>
+    /// <param name="itemIds">The item IDs to check.</param>
+    /// <returns>The set of item IDs that have alternate versions.</returns>
+    IReadOnlySet<Guid> GetItemIdsWithAlternateVersions(IReadOnlyList<Guid> itemIds);
+
+    /// <summary>
     /// Gets all artist matches from the database.
     /// </summary>
     /// <param name="artistNames">The names of the artists.</param>