Reimplmeent IsAvailableLocally as an abstract method

osu.Game/Scoring/ScoreModelManager.cs

@@ -69,5 +69,11 @@ namespace osu.Game.Scoring
 
             return Task.CompletedTask;
         }
+
+        public override bool IsAvailableLocally(ScoreInfo model)
+        {
+            using (var context = ContextFactory.CreateContext())
+                return context.All<ScoreInfo>().Any(b => b.OnlineID == model.OnlineID);
+        }
     }
 }

osu.Game/Skinning/SkinModelManager.cs

@@ -262,5 +262,7 @@ namespace osu.Game.Skinning
                 s.Hash = ComputeHash(s);
             });
         }
+
+        public override bool IsAvailableLocally(SkinInfo model) => false;
     }
 }

osu.Game/Stores/BeatmapImporter.cs

@@ -170,6 +170,12 @@ namespace osu.Game.Stores
             return existing.OnlineID == import.OnlineID && existingIds.SequenceEqual(importIds);
         }
 
+        public override bool IsAvailableLocally(BeatmapSetInfo model)
+        {
+            using (var context = ContextFactory.CreateContext())
+                return context.All<BeatmapInfo>().Any(b => b.OnlineID == model.OnlineID);
+        }
+
         public override string HumanisedModelName => "beatmap";
 
         protected override BeatmapSetInfo? CreateModel(ArchiveReader reader)

osu.Game/Stores/RealmArchiveModelManager.cs

@@ -183,8 +183,7 @@ namespace osu.Game.Stores
             }
         }
 
-        // TODO: delete or abstract
+        public abstract bool IsAvailableLocally(TModel model);
-        public virtual bool IsAvailableLocally(TModel model) => false; // Not relevant for skins since they can't be downloaded yet.
 
         public void Update(TModel skin)
         {