Add proper support for level dive-ins

ProjectLighthouse/Controllers/GameApi/Matching/MatchController.cs

@@ -88,9 +88,15 @@ public class MatchController : ControllerBase
                     room.State = (RoomState)playerData.RoomState;
         }
 
-        if (matchData is FindBestRoom && MatchHelper.UserLocations.Count > 1)
+        // Check how many people are online in release builds, disabled for debug for ..well debugging.
+        #if DEBUG
+        if (matchData is FindBestRoom diveInData)
+            #else
+        if (matchData is FindBestRoom diveInData && MatchHelper.UserLocations.Count > 1)
+            #endif
         {
-            FindBestRoomResponse? response = RoomHelper.FindBestRoom(user, gameToken.GameVersion, gameToken.Platform, gameToken.UserLocation);
+            FindBestRoomResponse? response = RoomHelper.FindBestRoom
+                (user, gameToken.GameVersion, diveInData.RoomSlot, gameToken.Platform, gameToken.UserLocation);
 
             if (response == null) return this.NotFound();
 

ProjectLighthouse/Helpers/RoomHelper.cs

@@ -42,11 +42,11 @@ public class RoomHelper
 
     internal static int RoomIdIncrement => roomIdIncrement++;
 
-    public static FindBestRoomResponse? FindBestRoom(User? user, GameVersion roomVersion, Platform? platform, string? location)
+    public static FindBestRoomResponse? FindBestRoom(User? user, GameVersion roomVersion, RoomSlot? slot, Platform? platform, string? location)
     {
         if (roomVersion == GameVersion.LittleBigPlanet1 || roomVersion == GameVersion.LittleBigPlanetPSP)
         {
-            Logger.Log($"Returning null for FindBestRoom, game ({roomVersion}) does not support dive in", LoggerLevelMatch.Instance);
+            Logger.Log($"Returning null for FindBestRoom, game ({roomVersion}) does not support dive in (should never happen?)", LoggerLevelMatch.Instance);
             return null;
         }
 
@@ -62,6 +62,14 @@ public class RoomHelper
         rooms = rooms.Where(r => r.RoomVersion == roomVersion).ToList();
         if (platform != null) rooms = rooms.Where(r => r.RoomPlatform == platform).ToList();
 
+        // If the user is in the pod while trying to look for a room, then they're diving in.
+        // Otherwise they're looking for people to play with in a particular level.
+        // We handle that here:
+        if (slot != null && slot.SlotType != SlotType.Pod && slot.SlotId != 0)
+        {
+            rooms = rooms.Where(r => r.Slot.SlotType == slot.SlotType && r.Slot.SlotId == slot.SlotId).ToList();
+        }
+
         foreach (Room room in rooms)
             // Look for rooms looking for players before moving on to rooms that are idle.
         {

ProjectLighthouse/Pages/Debug/RoomVisualizerPage.cshtml

@@ -52,7 +52,7 @@
 {
     if (version == GameVersion.LittleBigPlanet1 || version == GameVersion.LittleBigPlanetPSP || version == GameVersion.Unknown) continue;
 
-    FindBestRoomResponse? response = RoomHelper.FindBestRoom(null, version, null, null);
+    FindBestRoomResponse? response = RoomHelper.FindBestRoom(null, version, null, null, null);
     string text = response == null ? "No room found." : "Room " + response.RoomId;
 
     <p><b>Best room for @version.ToPrettyString()</b>: @text</p>

ProjectLighthouse/Types/Match/FindBestRoom.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Text.Json.Serialization;
+using LBPUnion.ProjectLighthouse.Types.Levels;
 
 namespace LBPUnion.ProjectLighthouse.Types.Match;
 
@@ -24,4 +25,11 @@ public class FindBestRoom : IMatchData
 
     [JsonIgnore]
     public IEnumerable<int> FirstSlot => this.Slots[0];
+
+    public RoomSlot RoomSlot
+        => new()
+        {
+            SlotType = (SlotType)this.Slots[0][0],
+            SlotId = this.Slots[0][1],
+        };
 }