Set version to 0.0.6

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Directory.Build.props

@@ -1,7 +1,7 @@
 <Project>
     <PropertyGroup>
-        <Version>0.0.5.0</Version>
+        <Version>0.0.6.0</Version>
-        <AssemblyVersion>0.0.5.0</AssemblyVersion>
+        <AssemblyVersion>0.0.6.0</AssemblyVersion>
-        <FileVersion>0.0.5.0</FileVersion>
+        <FileVersion>0.0.6.0</FileVersion>
     </PropertyGroup>
 </Project>

Jellyfin.Plugin.WatchedTogether.Tests/WatchedStateSyncTests.cs

@@ -26,7 +26,7 @@ public class WatchedStateSyncTests
 
         public Mock<IGroupService> Groups { get; } = new();
 
-        public List<(User Member, bool Played, int PlayCount)> Saves { get; } = new();
+        public List<Save> Saves { get; } = new();
 
         public WatchedStateSyncService Service { get; private set; } = null!;
 
@@ -34,7 +34,9 @@ public class WatchedStateSyncTests
             SharedGroup? group,
             IReadOnlyList<User> members,
             bool memberAlreadyPlayed = false,
-            int memberPlayCount = 0)
+            int memberPlayCount = 0,
+            DateTime? memberLastPlayedDate = null,
+            long memberPositionTicks = 0)
         {
             var h = new Harness();
 
@@ -46,7 +48,9 @@ public class WatchedStateSyncTests
                 {
                     Key = "k",
                     Played = memberAlreadyPlayed,
-                    PlayCount = memberPlayCount
+                    PlayCount = memberPlayCount,
+                    LastPlayedDate = memberLastPlayedDate,
+                    PlaybackPositionTicks = memberPositionTicks
                 });
 
             h.UserData.Setup(m => m.SaveUserData(
@@ -56,7 +60,8 @@ public class WatchedStateSyncTests
                     It.IsAny<UserDataSaveReason>(),
                     It.IsAny<CancellationToken>()))
                 .Callback<User, BaseItem, UserItemData, UserDataSaveReason, CancellationToken>(
-                    (u, _, d, _, _) => h.Saves.Add((u, d.Played, d.PlayCount)));
+                    (u, _, d, _, _) => h.Saves.Add(
+                        new Save(u, d.Played, d.PlayCount, d.LastPlayedDate, d.PlaybackPositionTicks)));
 
             h.Service = new WatchedStateSyncService(
                 h.UserData.Object,
@@ -70,7 +75,7 @@ public class WatchedStateSyncTests
         /// <summary>
         /// Raises UserDataSaved as the server would, by starting the service so it subscribes.
         /// </summary>
-        public void Raise(Guid userId, bool played, UserDataSaveReason reason)
+        public void Raise(Guid userId, bool played, UserDataSaveReason reason, DateTime? lastPlayedDate = null)
         {
             Service.StartAsync(CancellationToken.None).GetAwaiter().GetResult();
 
@@ -80,7 +85,7 @@ public class WatchedStateSyncTests
                 {
                     UserId = userId,
                     Item = new Folder { Name = "Some Item" },
-                    UserData = new UserItemData { Key = "k", Played = played },
+                    UserData = new UserItemData { Key = "k", Played = played, LastPlayedDate = lastPlayedDate },
                     SaveReason = reason
                 });
 
@@ -88,6 +93,14 @@ public class WatchedStateSyncTests
         }
     }
 
+    /// <summary>
+    /// A snapshot of one member row as it was handed to SaveUserData. The service reuses the
+    /// object it got from GetUserData, so the fields are copied rather than the reference kept.
+    /// </summary>
+    private sealed record Save(User Member, bool Played, int PlayCount, DateTime? LastPlayedDate, long PositionTicks);
+
+    private static readonly DateTime SharedWatchedAt = new(2026, 9, 18, 21, 30, 0, DateTimeKind.Utc);
+
     private static User MakeUser(string name) => new(name, "Prov", "ResetProv");
 
     private static SharedGroup MakeGroup(bool syncUnwatched = true, bool syncPlayCount = false)
@@ -126,11 +139,10 @@ public class WatchedStateSyncTests
 
     [Theory]
     [InlineData(UserDataSaveReason.PlaybackStart)]
-    [InlineData(UserDataSaveReason.PlaybackProgress)]
     [InlineData(UserDataSaveReason.UpdateUserRating)]
     public void IrrelevantSaveReasons_AreIgnored(UserDataSaveReason reason)
     {
-        // UserDataSaved fires constantly during playback; only watched-state changes matter.
+        // Neither of these ever carries a watched-state change, whatever the flag says.
         var h = Harness.Create(MakeGroup(), [MakeUser("alice")]);
 
         h.Raise(SharedId, true, reason);
@@ -138,6 +150,100 @@ public class WatchedStateSyncTests
         Assert.Empty(h.Saves);
     }
 
+    [Theory]
+    [InlineData(UserDataSaveReason.PlaybackFinished)]
+    [InlineData(UserDataSaveReason.PlaybackProgress)]
+    [InlineData(UserDataSaveReason.UpdateUserData)]
+    public void PlaybackDerivedReasons_SyncWatched(UserDataSaveReason reason)
+    {
+        // Progress crosses the completion threshold before the stop arrives, and some clients
+        // never send a stop at all, so the tick has to land on the progress tick too.
+        var h = Harness.Create(MakeGroup(), [MakeUser("alice")]);
+
+        h.Raise(SharedId, true, reason);
+
+        Assert.Single(h.Saves);
+        Assert.True(h.Saves[0].Played);
+    }
+
+    [Theory]
+    [InlineData(UserDataSaveReason.PlaybackFinished)]
+    [InlineData(UserDataSaveReason.PlaybackProgress)]
+    [InlineData(UserDataSaveReason.UpdateUserData)]
+    public void PlaybackDerivedReasons_NeverSyncUnwatched(UserDataSaveReason reason)
+    {
+        // PlaybackFinished fires on every stop, not just on completion, and on 10.11 PlaybackStart
+        // resets Played to false first. Stopping halfway through on the shared account must not
+        // clear what a member watched on their own - even with Sync unwatched on.
+        var h = Harness.Create(MakeGroup(syncUnwatched: true), [MakeUser("alice")], memberAlreadyPlayed: true);
+
+        h.Raise(SharedId, false, reason);
+
+        Assert.Empty(h.Saves);
+    }
+
+    [Fact]
+    public void Played_WritesWhatMarkPlayedWrites()
+    {
+        // Next Up is driven by LastPlayedDate on the member's own row, and a stale resume position
+        // would keep the item in Continue Watching, so the tick alone is not enough.
+        var h = Harness.Create(MakeGroup(), [MakeUser("alice")], memberPositionTicks: 12_345);
+
+        h.Raise(SharedId, true, UserDataSaveReason.PlaybackFinished, SharedWatchedAt);
+
+        var save = Assert.Single(h.Saves);
+        Assert.True(save.Played);
+        Assert.Equal(SharedWatchedAt, save.LastPlayedDate);
+        Assert.Equal(0, save.PositionTicks);
+    }
+
+    [Fact]
+    public void Played_FallsBackToNowWhenSharedAccountHasNoDate()
+    {
+        var before = DateTime.UtcNow;
+        var h = Harness.Create(MakeGroup(), [MakeUser("alice")]);
+
+        h.Raise(SharedId, true, UserDataSaveReason.TogglePlayed);
+
+        var save = Assert.Single(h.Saves);
+        Assert.NotNull(save.LastPlayedDate);
+        Assert.InRange(save.LastPlayedDate!.Value, before, DateTime.UtcNow);
+    }
+
+    [Fact]
+    public void Played_RepairsAnAlreadyTickedRowThatHasNoDate()
+    {
+        // Rows synced by earlier versions have the tick but no date. They are not "already in
+        // sync": without a date the member's Next Up never moves.
+        var h = Harness.Create(MakeGroup(), [MakeUser("alice")], memberAlreadyPlayed: true, memberLastPlayedDate: null);
+
+        h.Raise(SharedId, true, UserDataSaveReason.PlaybackFinished, SharedWatchedAt);
+
+        var save = Assert.Single(h.Saves);
+        Assert.True(save.Played);
+        Assert.Equal(SharedWatchedAt, save.LastPlayedDate);
+    }
+
+    [Fact]
+    public void Unwatched_WritesWhatMarkUnplayedWrites()
+    {
+        var h = Harness.Create(
+            MakeGroup(syncUnwatched: true),
+            [MakeUser("alice")],
+            memberAlreadyPlayed: true,
+            memberPlayCount: 3,
+            memberLastPlayedDate: SharedWatchedAt,
+            memberPositionTicks: 999);
+
+        h.Raise(SharedId, false, UserDataSaveReason.TogglePlayed);
+
+        var save = Assert.Single(h.Saves);
+        Assert.False(save.Played);
+        Assert.Null(save.LastPlayedDate);
+        Assert.Equal(0, save.PositionTicks);
+        Assert.Equal(3, save.PlayCount);
+    }
+
     [Fact]
     public void Unwatched_PropagatesWhenSyncUnwatchedEnabled()
     {
@@ -159,13 +265,20 @@ public class WatchedStateSyncTests
         Assert.Empty(h.Saves);
     }
 
-    [Fact]
+    [Theory]
-    public void RedundantWrites_AreSuppressed()
+    [InlineData(UserDataSaveReason.PlaybackFinished)]
+    [InlineData(UserDataSaveReason.PlaybackProgress)]
+    public void RedundantWrites_AreSuppressed(UserDataSaveReason reason)
     {
-        // The member already matches the shared account, so there is nothing to write.
+        // The member already matches the shared account, so there is nothing to write. This is
-        var h = Harness.Create(MakeGroup(), [MakeUser("alice")], memberAlreadyPlayed: true);
+        // what keeps the stream of progress ticks after the completion threshold write-free.
+        var h = Harness.Create(
+            MakeGroup(),
+            [MakeUser("alice")],
+            memberAlreadyPlayed: true,
+            memberLastPlayedDate: SharedWatchedAt);
 
-        h.Raise(SharedId, true, UserDataSaveReason.PlaybackFinished);
+        h.Raise(SharedId, true, reason);
 
         Assert.Empty(h.Saves);
     }

Jellyfin.Plugin.WatchedTogether/Services/WatchedStateSyncService.cs

@@ -70,9 +70,17 @@ public sealed class WatchedStateSyncService : IHostedService, IDisposable
     /// Mirrors a shared account's played state onto its members.
     /// </summary>
     /// <remarks>
+    /// <para>
     /// No loop guard is needed. Writing to a member raises this event again with that member's id,
     /// which is not a shared account id, so the handler returns immediately. The
     /// <c>Played</c> equality check below suppresses redundant writes on top of that.
+    /// </para>
+    /// <para>
+    /// A member is written the same way Jellyfin's own <c>BaseItem.MarkPlayed</c> and
+    /// <c>MarkUnplayed</c> write, not just the <c>Played</c> flag. Next Up is driven entirely by
+    /// <c>LastPlayedDate</c> on the member's own row, so a tick without a date leaves the member's
+    /// Next Up stuck; and a stale resume position would keep the item in Continue Watching.
+    /// </para>
     /// </remarks>
     private void OnUserDataSaved(object? sender, UserDataSaveEventArgs e)
     {
@@ -81,11 +89,8 @@ public sealed class WatchedStateSyncService : IHostedService, IDisposable
             return;
         }
 
-        // UserDataSaved fires constantly during playback (progress ticks); only act on the reasons
+        var played = e.UserData.Played;
-        // that actually represent a change in watched state.
+        if (!IsWatchedStateChange(e.SaveReason, played))
-        if (e.SaveReason is not (UserDataSaveReason.PlaybackFinished
-            or UserDataSaveReason.TogglePlayed
-            or UserDataSaveReason.Import))
         {
             return;
         }
@@ -96,7 +101,6 @@ public sealed class WatchedStateSyncService : IHostedService, IDisposable
             return;
         }
 
-        var played = e.UserData.Played;
         if (!played && !group.SyncUnwatched)
         {
             return;
@@ -107,16 +111,36 @@ public sealed class WatchedStateSyncService : IHostedService, IDisposable
             try
             {
                 var data = _userDataManager.GetUserData(member, e.Item);
-                if (data is null || data.Played == played)
+                if (data is null)
                 {
                     continue;
                 }
 
-                data.Played = played;
+                // Rows written by earlier versions carry the tick but no date; give those a date
-
+                // the next time the item syncs rather than skipping them as already in sync.
-                if (group.SyncPlayCount && played && data.PlayCount < 1)
+                if (data.Played == played && (!played || data.LastPlayedDate.HasValue))
                 {
-                    data.PlayCount = 1;
+                    continue;
+                }
+
+                if (played)
+                {
+                    data.Played = true;
+                    data.PlaybackPositionTicks = 0;
+                    data.LastPlayedDate = e.UserData.LastPlayedDate ?? DateTime.UtcNow;
+
+                    if (group.SyncPlayCount && data.PlayCount < 1)
+                    {
+                        data.PlayCount = 1;
+                    }
+                }
+                else
+                {
+                    // Same as Jellyfin's MarkUnplayed, except the play count is left alone: it is
+                    // documented as never decreasing.
+                    data.Played = false;
+                    data.PlaybackPositionTicks = 0;
+                    data.LastPlayedDate = null;
                 }
 
                 _userDataManager.SaveUserData(
@@ -144,4 +168,42 @@ public sealed class WatchedStateSyncService : IHostedService, IDisposable
             }
         }
     }
+
+    /// <summary>
+    /// Decides whether a save represents a change in watched state worth mirroring.
+    /// </summary>
+    /// <remarks>
+    /// <para>
+    /// <see cref="UserDataSaveReason.TogglePlayed"/> and <see cref="UserDataSaveReason.Import"/>
+    /// are explicit: someone set the flag, so whatever it says is mirrored, unwatched included.
+    /// </para>
+    /// <para>
+    /// The rest only ever mean "watched" when <paramref name="played"/> is true. Jellyfin raises
+    /// <see cref="UserDataSaveReason.PlaybackFinished"/> on every stop, not just on completion, so
+    /// a stop before the completion threshold leaves <c>Played</c> false without anybody having
+    /// marked anything unwatched - and on 10.11 <c>PlaybackStart</c> resets it to false as well.
+    /// Mirroring that would clear members' own watched state. Likewise
+    /// <see cref="UserDataSaveReason.UpdateUserData"/> is a partial update (a favourite toggle
+    /// arrives with the same reason) where a false flag need not mean a change at all.
+    /// </para>
+    /// <para>
+    /// <see cref="UserDataSaveReason.PlaybackProgress"/> is included so the tick lands as soon as
+    /// the completion threshold is crossed, and still lands for clients that never report a stop.
+    /// The equality check in the handler keeps the remaining progress ticks write-free.
+    /// </para>
+    /// </remarks>
+    /// <param name="reason">Why the user data was saved.</param>
+    /// <param name="played">The played flag on the saved user data.</param>
+    /// <returns><c>true</c> if the save should be mirrored to members.</returns>
+    private static bool IsWatchedStateChange(UserDataSaveReason reason, bool played)
+    {
+        return reason switch
+        {
+            UserDataSaveReason.TogglePlayed or UserDataSaveReason.Import => true,
+            UserDataSaveReason.PlaybackFinished
+                or UserDataSaveReason.PlaybackProgress
+                or UserDataSaveReason.UpdateUserData => played,
+            _ => false,
+        };
+    }
 }

README.md

@@ -141,9 +141,21 @@ Two consequences worth knowing:
 
 ### Watched-state sync
 
-The plugin subscribes to `UserDataSaved` and filters tightly: only `PlaybackFinished`,
+The plugin subscribes to `UserDataSaved` and decides per save reason what it means:
-`TogglePlayed` and `Import` are acted on, so the constant stream of progress updates during playback
+
-is ignored.
+- `TogglePlayed` and `Import` are explicit - someone set the flag - so whatever it says is mirrored,
+  unwatched included (subject to *Sync unwatched*).
+- `PlaybackFinished`, `PlaybackProgress` and `UpdateUserData` only ever mirror *watched*. Jellyfin
+  raises `PlaybackFinished` on every stop, not just on completion, so a stop halfway through leaves
+  `Played` false without anyone having marked anything unwatched; propagating that would wipe what a
+  member watched on their own. Acting on progress too means the tick lands the moment the completion
+  threshold is crossed, and still lands for clients that never report a stop.
+- Everything else (`PlaybackStart`, `UpdateUserRating`) is ignored.
+
+A member is written the way Jellyfin's own *mark played* writes - `Played`, `LastPlayedDate` and a
+cleared resume position - not just the flag. *Next Up* is computed from `LastPlayedDate` on the
+member's own row, so a bare tick would leave their Next Up stuck on the wrong episode. Members whose
+row already matches are skipped, which keeps the progress ticks after the threshold write-free.
 
 No feedback loop is possible: writing to a member raises the event again with *that member's* ID,
 which is not a shared account, so the handler stops immediately.

build.yaml

@@ -1,7 +1,7 @@
 ---
 name: "Watched Together"
 guid: "aa3288a0-e8c1-43e2-8045-8c3411142a5b"
-version: "0.0.5.0"
+version: "0.0.6.0"
 # The plugin ships one package per Jellyfin generation. These defaults describe the 10.11 package;
 # scripts/package.sh stamps targetAbi/framework for whichever generation it is asked to build.
 targetAbi: "10.11.0.0"

manifest.json

@@ -7,6 +7,22 @@
     "owner": "dtourolle",
     "category": "General",
     "versions": [
+      {
+        "version": "0.0.5.12",
+        "changelog": "Release 0.0.5.12 (Jellyfin 12)",
+        "targetAbi": "12.0.0.0",
+        "sourceUrl": "https://gitea.tourolle.paris/dtourolle/WatchedTogether/releases/download/v0.0.5/watched-together_0.0.5.12.zip",
+        "checksum": "a1058821e7e218a2426699e9459ae6ae",
+        "timestamp": "2026-09-11T17:32:25Z"
+      },
+      {
+        "version": "0.0.5.11",
+        "changelog": "Release 0.0.5.11 (Jellyfin 10.11)",
+        "targetAbi": "10.11.0.0",
+        "sourceUrl": "https://gitea.tourolle.paris/dtourolle/WatchedTogether/releases/download/v0.0.5/watched-together_0.0.5.11.zip",
+        "checksum": "0cbc0bf4352142fe7ccf303cfc31c896",
+        "timestamp": "2026-09-11T17:32:25Z"
+      },
       {
         "version": "0.0.4.0",
         "changelog": "Release 0.0.4.0",