Added 3 New LBP3 Categories by W0lf4llo · Pull Request #1109 · LBPUnion/ProjectLighthouse

W0lf4llo · 2026-08-12T03:11:10Z

I added support for LBP3's recently played category.

Essentially, LBP2 tracks which levels you've played client side, and just reports it back whenever you click on "Recently Played". LBP3 on the original servers would handle all of this server sided. This essentially works by recording the recently played community levels via the games "gameState" request, then it stores the recently played slot ID's and the timestamps per each user. I set a limit so that it keeps a maximum of 20 recently played levels, when you replay a level that was already on the list, it changes the timestamp to have it re-appear at the top of the list. The game also only applies to users who are playing on LBP3. If you play LBP1 or LBP2, it will not change this list whatsoever.

W0lf4llo · 2026-08-13T06:48:57Z

I wrote a fairly simple recommendation system for the server which is VERY similar to how Sony used to handle it. I left my comments in there so you can easily read what everything does and why its there. If anything else is needed to change in this PR please let me know! I just figured I'd stack it on top of this pr as i built this on top of my already existing work.

Toastbrot236 · 2026-08-13T10:55:27Z

Is there a reason you're using /gameState instead of /play to find out what levels a user has played?

W0lf4llo · 2026-08-14T17:22:50Z

Also, I forgot to thank you on here for the recommendation, as using /play was a far better way of tracking when a user actually enters a community level. I appreciate it!

W0lf4llo · 2026-08-14T20:58:04Z

Also, this is my last commit to the PR unless an issue has been found.. which I'm sure there will 100% be issues, just feel free to let me know, and ask any questions if needed!

Increased the limit of recently played slots from 20 to 30.

FeTetra

There is a lot more to review, but I'm going to leave this for now.

…hController.cs Co-authored-by: FeTetra <166051662+FeTetra@users.noreply.github.com>

…velsCategory.cs Co-authored-by: FeTetra <166051662+FeTetra@users.noreply.github.com>

Slendy

Thanks for your contribution!

Here are a few more things that should be addressed that aren't covered in the requested changes:

Comments should have a space between the two backslashes and the first character of the comment (//comment goes here should be // comment goes here)
Indentation of code and comments in certain places is off

This could honestly be split into separate PRs since from what I can tell the recently played and recommended categories have nothing to do with each other, but it's fine given how dead development is now.

Slendy · 2026-08-25T14:00:05Z

+    {
+        RecentlyPlayedEntity? recentlyPlayed = await this.RecentlyPlayed.FirstOrDefaultAsync(r => r.UserId == userId);
+
+        long now = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();


Suggested change

long now = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();

long now = TimeHelper.TimestampMillis;

Slendy · 2026-08-25T14:11:28Z

@@ -0,0 +1,1602 @@
+// <auto-generated />


This entire file doesn't need to be included and can be deleted

Slendy · 2026-08-25T14:16:31Z

+    public bool ShouldSerializeGameFilter() => !string.IsNullOrWhiteSpace(this.GameFilter);
+
+    public bool ShouldSerializeDateFilterType() => !string.IsNullOrWhiteSpace(this.DateFilterType);
+
+    public bool ShouldSerializeIncludePlayed() => this.IncludePlayed.HasValue;
+
+    public bool ShouldSerializeTeamPicked() => !string.IsNullOrWhiteSpace(this.TeamPicked);
+
+    public bool ShouldSerializeBlacklisted() => !string.IsNullOrWhiteSpace(this.Blacklisted);
+}


Instead of a bunch of ShouldSerialize you should use

[DefaultValue("")]

on any nullable fields that you don't want to show up if they are empty. If the field is an object then you can use null instead of the empty double quotes

example:

[DefaultValue("")] [XmlElement("gameFilter")] public string? GameFilter { get; set; }

There's a couple places that this should be fixed but I'm not going to comment on all of them for brevity.

Suggested change

public bool ShouldSerializeGameFilter() => !string.IsNullOrWhiteSpace(this.GameFilter);

public bool ShouldSerializeDateFilterType() => !string.IsNullOrWhiteSpace(this.DateFilterType);

public bool ShouldSerializeIncludePlayed() => this.IncludePlayed.HasValue;

public bool ShouldSerializeTeamPicked() => !string.IsNullOrWhiteSpace(this.TeamPicked);

public bool ShouldSerializeBlacklisted() => !string.IsNullOrWhiteSpace(this.Blacklisted);

}

Slendy · 2026-08-25T14:20:15Z

                return this.BadRequest();
        }

+        if (token.GameVersion == GameVersion.LittleBigPlanet3 && slotType == "user")


The slotType check isn't necessary because story levels are excluded via the check on line 36

Suggested change

if (token.GameVersion == GameVersion.LittleBigPlanet3 && slotType == "user")

if (token.GameVersion == GameVersion.LittleBigPlanet3)

Slendy · 2026-08-25T15:36:48Z

+    }
+
+    public IQueryable<ScoredSlot> GetScoredItems(DatabaseContext database, GameTokenEntity token, SlotQueryBuilder queryBuilder)
+    {


I think this should be refactored into 2 separate functions for actually calculating the user's search scores, and then fetching the levels based on the scores should take place here.

Slendy · 2026-08-25T15:54:37Z

+
+        long now = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
+
+        //Level at the top of the recently played category for the user


This comment doesn't really make sense, is it supposed to go somewhere else?

Slendy · 2026-08-25T15:59:59Z

+        {
+            Slot = s,
+            ThumbsUp = database.RatedLevels.Count(r => r.SlotId == s.SlotId && r.Rating == 1),
+        })


Suggested change

{

Slot = s,

ThumbsUp = database.RatedLevels.Count(r => r.SlotId == s.SlotId && r.Rating == 1),

})

{

Slot = s,

ThumbsUp = database.RatedLevels.Count(r => r.SlotId == s.SlotId && r.Rating == 1),

})

Fix indentation here

Slendy · 2026-08-25T16:04:30Z

+    public override string[] Sorts { get; } =
+    {
+      "relevance",
+    };


Suggested change

public override string[] Sorts { get; } =

{

"relevance",

};

public override string[] Sorts { get; } = ["relevance",];

This change should be implemented in all Category classes where possible

Slendy · 2026-08-25T17:27:11Z

+        {
+            Slot = s,
+            Hearts = database.HeartedLevels.Count(r => r.SlotId == s.SlotId),
+        })


Suggested change

{

Slot = s,

Hearts = database.HeartedLevels.Count(r => r.SlotId == s.SlotId),

})

{

Slot = s,

Hearts = database.HeartedLevels.Count(r => r.SlotId == s.SlotId),

})

Fix indentation

Slendy · 2026-08-25T17:32:56Z

+            return database.Slots.Where(_ => false);
+
+        List<int> slotIds = recentlyPlayed.SlotIds
+            .Take(30)


This should also use the config value instead of hardcoding it

sudokoko

A couple things I noticed, on top of Slendy's review.

sudokoko · 2026-08-25T18:10:49Z

+        SlotQueryBuilder queryBuilder)
+    {
+        RecentlyPlayedEntity? recentlyPlayed = database.RecentlyPlayed
+            .AsNoTracking()


You're using .AsNoTracking() in some places and not others, and additionally - I don't believe we've really ever marked database calls as explicitly untracked.

Suggested change

.AsNoTracking()

sudokoko · 2026-08-25T18:29:38Z

+{
+    public int MaxNeighbors { get; set; } = 250;
+    public int MinimumNeighborOverlap { get; set; } = 2;
+    public int MaxCandidatePool { get; set; } = 1000;


Suggested change

public int MaxCandidatePool { get; set; } = 1000;

From what I can tell, this isn't used anywhere. I don't know if you intended for it to be.

sudokoko · 2026-08-25T18:34:13Z

+        IQueryable<ScoredSlot> recommendations =
+            from slot in database.Slots
+                .AsNoTracking()
+                .Where(queryBuilder.Build())
+                .Where(slot => !database.VisitedLevels.Any(visitedLevel =>
+                    visitedLevel.UserId == token.UserId &&
+                    visitedLevel.SlotId == slot.SlotId))
+
+            join score in scores
+                on slot.SlotId equals score.SlotId
+
+            let hearts = database.HeartedLevels.Count(heartedLevel =>
+                heartedLevel.SlotId == slot.SlotId)
+
+            let likes = database.RatedLevels.Count(rating =>
+                rating.SlotId == slot.SlotId &&
+                rating.Rating == 1)


This query seems to do a lot of unbounded work and performs multiple COUNT operations per slot. Could have performance issues at scale.

Perhaps this is where you intended to use CategoryConfiguration.Instance.Recommended.MaxCandidatePool to limit the candidate set before performing expensive aggregates?

Could also pre-aggregate the likes and hearts in separate grouped queries instead of calling COUNT inside of the projection.

.Take(config.MaxCandidatePool)

sudokoko · 2026-08-25T18:51:24Z

        #nullable disable

-        this.PlayerCount = RoomHelper.Rooms.Count(r => r.Slot.SlotType == SlotType.User && r.Slot.SlotId == this.SlotId);
+        Dictionary<int, int> playerCounts = RoomHelper.GetUserLevelPlayerCounts();


If PrepareSerialization is invoked for multiple slots in parallel, this could result in a performance issue with how this method is implemented. See comment in GameUserSlot.cs.

sudokoko · 2026-08-25T18:53:01Z


+    public static Dictionary<int, int> GetUserLevelPlayerCounts()
+    {
+        lock (RoomLock)


Continued from the comment on GameUserSlot.cs - method acquires a lock and builds a full dictionary each time. Consider caching the counts for the duration of the request or exposing an API where the caller computes the counts once and reuses them for multiple calls.

W0lf4llo added 4 commits August 11, 2026 22:50

Added Recently Played support for LittleBigPlanet 3

a53ca0a

Added the start to a LBP3 recommended category

2a4fb4d

Implemented the recommended tab for LBP3

c0e8b33

Made the code look a little neater

816c9f0

W0lf4llo changed the title ~~Added Recently Played support for LittleBigPlanet 3~~ Added Recently Played & Recommended For You to LBP3 Aug 13, 2026

W0lf4llo added 2 commits August 13, 2026 14:42

Recently played uses the play endpoint instead of gameState now

24631ff

Added Buisiest category to LBP3

6856321

W0lf4llo changed the title ~~Added Recently Played & Recommended For You to LBP3~~ Added 3 New LBP3 Categories Aug 13, 2026

Fixed category metadata and filters

eca1321

W0lf4llo added 2 commits August 18, 2026 10:00

Change recently played slot limit to 30

97dd3aa

Increased the limit of recently played slots from 20 to 30.

Updated level slots from 20 to 30

0120a38

FeTetra requested changes Aug 21, 2026

View reviewed changes

W0lf4llo and others added 5 commits August 24, 2026 20:32

Update ProjectLighthouse.Servers.GameServer/Controllers/Matching/Matc…

240d12c

…hController.cs Co-authored-by: FeTetra <166051662+FeTetra@users.noreply.github.com>

Update ProjectLighthouse.Servers.GameServer/Controllers/Matching/Matc…

d89ecb0

…hController.cs Co-authored-by: FeTetra <166051662+FeTetra@users.noreply.github.com>

Update ProjectLighthouse.Servers.GameServer/Types/Categories/NewestLe…

3a95307

…velsCategory.cs Co-authored-by: FeTetra <166051662+FeTetra@users.noreply.github.com>

Update ProjectLighthouse.Servers.GameServer/Types/Categories/NewestLe…

37c1cbf

…velsCategory.cs Co-authored-by: FeTetra <166051662+FeTetra@users.noreply.github.com>

Followed feedback, added category config

789feff

Slendy requested changes Aug 25, 2026

View reviewed changes

sudokoko self-requested a review August 25, 2026 18:44

sudokoko requested changes Aug 25, 2026

View reviewed changes

	long now = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
	long now = TimeHelper.TimestampMillis;

	if (token.GameVersion == GameVersion.LittleBigPlanet3 && slotType == "user")
	if (token.GameVersion == GameVersion.LittleBigPlanet3)


		long now = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();

		//Level at the top of the recently played category for the user

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W0lf4llo commented Aug 12, 2026

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Toastbrot236 commented Aug 13, 2026

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W0lf4llo commented Aug 14, 2026

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W0lf4llo commented Aug 14, 2026 •

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