更好的缓存，扬掉global，重构代码，整理聊天逻辑 (#16)

* 实现缓存装饰器，优化数据获取和存储逻辑

* 重构代码，准备将聊天请求逻辑移入MarshoHandler

* 记录点（

* unfinished

* 🎨 重写基本完毕

* 移除未使用import，添加漏掉的换行

nonebot_plugin_marshoai/util.py

@@ -20,13 +20,13 @@ from openai.types.chat import ChatCompletion, ChatCompletionMessage
 from zhDateTime import DateTime
 
 from ._types import DeveloperMessage
+from .cache.decos import *
 from .config import config
 from .constants import CODE_BLOCK_PATTERN, IMG_LATEX_PATTERN, OPENAI_NEW_MODELS
 from .deal_latex import ConvertLatex
-from .instances import cache
 
-nickname_json = None  # 记录昵称
-praises_json = None  # 记录夸赞名单
+# nickname_json = None  # 记录昵称
+# praises_json = None  # 记录夸赞名单
 loaded_target_list: List[str] = []  # 记录已恢复备份的上下文的列表
 
 NOT_GIVEN = NotGiven()
@@ -156,30 +156,29 @@ async def make_chat_openai(
     )
 
 
+@from_cache("praises")
 def get_praises():
-    global praises_json
-    if praises_json is None:
-        praises_file = store.get_plugin_data_file(
-            "praises.json"
-        )  # 夸赞名单文件使用localstore存储
-        if not praises_file.exists():
-            with open(praises_file, "w", encoding="utf-8") as f:
-                json.dump(_praises_init_data, f, ensure_ascii=False, indent=4)
-        with open(praises_file, "r", encoding="utf-8") as f:
-            data = json.load(f)
-        praises_json = data
+    praises_file = store.get_plugin_data_file(
+        "praises.json"
+    )  # 夸赞名单文件使用localstore存储
+    if not praises_file.exists():
+        with open(praises_file, "w", encoding="utf-8") as f:
+            json.dump(_praises_init_data, f, ensure_ascii=False, indent=4)
+    with open(praises_file, "r", encoding="utf-8") as f:
+        data = json.load(f)
+    praises_json = data
     return praises_json
 
 
+@update_to_cache("praises")
 async def refresh_praises_json():
-    global praises_json
     praises_file = store.get_plugin_data_file("praises.json")
     if not praises_file.exists():
         with open(praises_file, "w", encoding="utf-8") as f:
             json.dump(_praises_init_data, f, ensure_ascii=False, indent=4)  # 异步？
     async with aiofiles.open(praises_file, "r", encoding="utf-8") as f:
         data = json.loads(await f.read())
-    praises_json = data
+    return data
 
 
 def build_praises() -> str:
@@ -211,22 +210,21 @@ async def load_context_from_json(name: str, path: str) -> list:
         return []
 
 
+@from_cache("nickname")
 async def get_nicknames():
-    """获取nickname_json, 优先来源于全局变量"""
-    global nickname_json
-    if nickname_json is None:
-        filename = store.get_plugin_data_file("nickname.json")
-        # noinspection PyBroadException
-        try:
-            async with aiofiles.open(filename, "r", encoding="utf-8") as f:
-                nickname_json = json.loads(await f.read())
-        except (json.JSONDecodeError, FileNotFoundError):
-            nickname_json = {}
+    """获取nickname_json, 优先来源于缓存"""
+    filename = store.get_plugin_data_file("nickname.json")
+    # noinspection PyBroadException
+    try:
+        async with aiofiles.open(filename, "r", encoding="utf-8") as f:
+            nickname_json = json.loads(await f.read())
+    except (json.JSONDecodeError, FileNotFoundError):
+        nickname_json = {}
     return nickname_json
 
 
+@update_to_cache("nickname")
 async def set_nickname(user_id: str, name: str):
-    global nickname_json
     filename = store.get_plugin_data_file("nickname.json")
     if not filename.exists():
         data = {}
@@ -238,18 +236,24 @@ async def set_nickname(user_id: str, name: str):
         del data[user_id]
     with open(filename, "w", encoding="utf-8") as f:
         json.dump(data, f, ensure_ascii=False, indent=4)
-    nickname_json = data
+    return data
 
 
+async def get_nickname_by_user_id(user_id: str):
+    nickname_json = await get_nicknames()
+    return nickname_json.get(user_id, "")
+
+
+@update_to_cache("nickname")
 async def refresh_nickname_json():
-    """强制刷新nickname_json, 刷新全局变量"""
-    global nickname_json
+    """强制刷新nickname_json"""
     # noinspection PyBroadException
     try:
         async with aiofiles.open(
             store.get_plugin_data_file("nickname.json"), "r", encoding="utf-8"
         ) as f:
             nickname_json = json.loads(await f.read())
+        return nickname_json
     except (json.JSONDecodeError, FileNotFoundError):
         logger.error("刷新 nickname_json 表错误：无法载入 nickname.json 文件")