From 0874a26131a5a1e9d62fb7231acbaf9eb921b5c8 Mon Sep 17 00:00:00 2001
From: Shadowghost <Ghost_of_Stone@web.de>
Date: Tue, 9 Jun 2026 23:23:03 +0200
Subject: Coalesce alternate-version progress onto primary in resume filter

---
 .../Library/VersionResumeData.cs                   | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 MediaBrowser.Controller/Library/VersionResumeData.cs

(limited to 'MediaBrowser.Controller/Library/VersionResumeData.cs')

diff --git a/MediaBrowser.Controller/Library/VersionResumeData.cs b/MediaBrowser.Controller/Library/VersionResumeData.cs
new file mode 100644
index 0000000000..ca8a499d97
--- /dev/null
+++ b/MediaBrowser.Controller/Library/VersionResumeData.cs
@@ -0,0 +1,30 @@
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Model.Dto;
+
+namespace MediaBrowser.Controller.Library
+{
+    /// <summary>
+    /// The user data of the alternate version that should drive resume for a multi-version item.
+    /// </summary>
+    /// <param name="UserData">The resume version's user data.</param>
+    /// <param name="RunTimeTicks">The resume version's runtime, used for the progress percentage.</param>
+    public record VersionResumeData(UserItemData UserData, long? RunTimeTicks)
+    {
+        /// <summary>
+        /// Applies the resume version's playback state to the supplied user data dto, so that an item
+        /// whose most recent progress lives on an alternate version still reports that progress.
+        /// </summary>
+        /// <param name="dto">The user data dto to update.</param>
+        public void ApplyTo(UserItemDataDto dto)
+        {
+            dto.PlaybackPositionTicks = UserData.PlaybackPositionTicks;
+            dto.Played = UserData.Played;
+            dto.LastPlayedDate = UserData.LastPlayedDate;
+
+            if (RunTimeTicks > 0 && UserData.PlaybackPositionTicks > 0)
+            {
+                dto.PlayedPercentage = 100.0 * UserData.PlaybackPositionTicks / RunTimeTicks.Value;
+            }
+        }
+    }
+}
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