Perform client side validation that the selected beatmap and ruleset have valid online IDs

This is local to playlists, since in multiplayer the validation is
already provided by `osu-server-spectator`.

osu.Game/Screens/OnlinePlay/OnlinePlayStyleSelect.cs

@@ -89,6 +89,7 @@ namespace osu.Game.Screens.OnlinePlay
 
                 // Must be from the same set as the playlist item.
                 criteria.BeatmapSetId = beatmapSetId;
+                criteria.HasOnlineID = true;
 
                 // Must be within 30s of the playlist item.
                 criteria.Length.Min = itemLength - 30000;

osu.Game/Screens/OnlinePlay/Playlists/PlaylistsRoomStyleSelect.cs

@@ -21,6 +21,13 @@ namespace osu.Game.Screens.OnlinePlay.Playlists
 
         protected override bool OnStart()
         {
+            // Beatmaps without a valid online ID are filtered away; this is just a final safety.
+            if (base.Beatmap.Value.BeatmapInfo.OnlineID < 0)
+                return false;
+
+            if (base.Ruleset.Value.OnlineID < 0)
+                return false;
+
             Beatmap.Value = base.Beatmap.Value.BeatmapInfo;
             Ruleset.Value = base.Ruleset.Value;
             this.Exit();

osu.Game/Screens/Select/Carousel/CarouselBeatmap.cs

@@ -90,6 +90,9 @@ namespace osu.Game.Screens.Select.Carousel
             if (match && criteria.RulesetCriteria != null)
                 match &= criteria.RulesetCriteria.Matches(BeatmapInfo, criteria);
 
+            if (match && criteria.HasOnlineID == true)
+                match &= BeatmapInfo.OnlineID >= 0;
+
             if (match && criteria.BeatmapSetId != null)
                 match &= criteria.BeatmapSetId == BeatmapInfo.BeatmapSet?.OnlineID;
 

osu.Game/Screens/Select/FilterCriteria.cs

@@ -58,6 +58,8 @@ namespace osu.Game.Screens.Select
         public bool AllowConvertedBeatmaps;
         public int? BeatmapSetId;
 
+        public bool? HasOnlineID;
+
         private string searchText = string.Empty;
 
         /// <summary>