[Refactor] Init files Encoding & Refresh rating

- Now initial files can be other encoding types which are supported by JSON module
- Code refactor for refreshing all scores' rating

latest version/core/operation.py

@@ -0,0 +1,54 @@
+from .sql import Connect, Sql
+from .score import Score
+
+
+class BaseOperation:
+    name: str = None
+
+    def __init__(self):
+        pass
+
+    def __call__(self, *args, **kwargs):
+        return self.run(*args, **kwargs)
+
+    def run(self, *args, **kwargs):
+        raise NotImplementedError
+
+
+class RefreshAllScoreRating(BaseOperation):
+    '''
+        刷新所有成绩的评分
+    '''
+    name = 'refresh_all_score_rating'
+
+    def run(self):
+        # 追求效率，不用Song类，尽量不用对象
+        with Connect() as c:
+            c.execute(
+                '''select song_id, rating_pst, rating_prs, rating_ftr, rating_byn from chart''')
+            x = c.fetchall()
+
+            songs = [i[0] for i in x]
+            c.execute(
+                f'''update best_score set rating=0 where song_id not in ({','.join(['?']*len(songs))})''', songs)
+
+            for i in x:
+                for j in range(0, 4):
+                    defnum = -10  # 没在库里的全部当做定数-10
+                    if i[j+1] is not None and i[j+1] > 0:
+                        defnum = float(i[j+1]) / 10
+
+                    c.execute('''select user_id, score from best_score where song_id=:a and difficulty=:b''', {
+                              'a': i[0], 'b': j})
+                    y = c.fetchall()
+                    values = []
+                    where_values = []
+                    for k in y:
+                        ptt = Score.calculate_rating(defnum, k[1])
+                        if ptt < 0:
+                            ptt = 0
+                        values.append((ptt,))
+                        where_values.append((k[0], i[0], j))
+                    if values:
+                        Sql(c).update_many('best_score', ['rating'], values, [
+                            'user_id', 'song_id', 'difficulty'], where_values)