feat: rework NaiveRating, improve InfiniteGP

NaiveRating/MU3/NaiveRating.cs

@@ -0,0 +1,58 @@
+#pragma warning disable CS0626
+#pragma warning disable CS0649
+#pragma warning disable IDE0051
+#pragma warning disable IDE1006
+
+using System.Collections.Generic;
+using System.Linq;
+using MU3.Data;
+using MU3.DataStudio;
+using MU3.User;
+using MU3.Util;
+
+namespace MU3;
+
+public static class NaiveRating {
+    public static int PrevRating { get; set; }
+
+    // Adapted from MU3.User.UserRating.calcBest()
+    private static RatingList calcSane() {
+        RatingList ratingList = new();
+
+        var usMgr = Singleton<UserManager>.instance;
+        var musicDict = usMgr.userMusic;
+
+        foreach(KeyValuePair<int, UserMusic> item in musicDict) {
+            var musicData = SingletonStateMachine<DataManager, DataManager.EState>
+                .instance.getMusicData(item.Key);
+
+            if(musicData == null || item.Key == 1 || musicData.isBonusTrack) {
+                continue;
+            }
+            for(int i = 0; i < 5; i++) {
+                var fumenDifficulty = (FumenDifficulty)i;
+                var userFumen = usMgr.getUserFumen(item.Key, fumenDifficulty, create: false);
+                if(userFumen == null) {
+                    continue;
+                }
+                Rating rating = new(musicData.id, fumenDifficulty, userFumen.TechScoreMax);
+                if(rating.level100 == 0) {
+                    continue;
+                }
+                ratingList.Add(rating);
+            }
+        }
+
+        ratingList.Sort();
+        return ratingList;
+    }
+    public static int Get() {
+        int res = 0;
+        foreach(Rating best in calcSane().Take(45)) {
+            res += best.rate100;
+        }
+        return res > 0
+            ? res / 45
+            : Singleton<UserManager>.instance.Rating;
+    }
+}