Add song ranks, improve non-S rating calculation

titles/chuni/const.py

@@ -19,11 +19,13 @@ class ChuniConstants:
     VER_CHUNITHM_CRYSTAL = 8
     VER_CHUNITHM_CRYSTAL_PLUS = 9
     VER_CHUNITHM_PARADISE = 10
+
     VER_CHUNITHM_NEW = 11
     VER_CHUNITHM_NEW_PLUS = 12
     VER_CHUNITHM_SUN = 13
     VER_CHUNITHM_SUN_PLUS = 14
     VER_CHUNITHM_LUMINOUS = 15
+
     VERSION_NAMES = [
         "CHUNITHM",
         "CHUNITHM PLUS",
@@ -43,6 +45,37 @@ class ChuniConstants:
         "CHUNITHM LUMINOUS",
     ]
 
+    SCORE_RANK_INTERVALS_OLD = [
+        (1007500, "SSS"),
+        (1000000, "SS"),
+        ( 975000, "S"),
+        ( 950000, "AAA"),
+        ( 925000, "AA"),
+        ( 900000, "A"),
+        ( 800000, "BBB"),
+        ( 700000, "BB"),
+        ( 600000, "B"),
+        ( 500000, "C"),
+        (      0, "D"),
+    ]
+
+    SCORE_RANK_INTERVALS_NEW = [
+        (1009000, "SSS+"),  # New only
+        (1007500, "SSS"),
+        (1005000, "SS+"),  # New only
+        (1000000, "SS"),
+        ( 990000, "S+"),  # New only
+        ( 975000, "S"),
+        ( 950000, "AAA"),
+        ( 925000, "AA"),
+        ( 900000, "A"),
+        ( 800000, "BBB"),
+        ( 700000, "BB"),
+        ( 600000, "B"),
+        ( 500000, "C"),
+        (      0, "D"),
+    ]
+
     @classmethod
     def game_ver_to_string(cls, ver: int):
         return cls.VERSION_NAMES[ver]