fix：优化单例模式和类引用

app/helper/message.py

@@ -61,7 +61,8 @@ class TemplateContextBuilder:
         self._add_transfer_info(transferinfo)
         self._add_torrent_info(torrentinfo)
         self._add_file_info(file_extension)
-        if kwargs: self._context.update(kwargs)
+        if kwargs:
+            self._context.update(kwargs)
 
         if include_raw_objects:
             self._add_raw_objects(meta, mediainfo, torrentinfo, transferinfo, episodes_info)
@@ -73,7 +74,8 @@ class TemplateContextBuilder:
         """
         增加媒体信息
         """
-        if not mediainfo: return
+        if not mediainfo:
+            return
         season_fmt = f"S{mediainfo.season:02d}" if mediainfo.season is not None else None
         base_info = {
             # 标题
@@ -245,7 +247,8 @@ class TemplateContextBuilder:
         """
         添加文件信息
         """
-        if not file_extension: return
+        if not file_extension:
+            return
         file_info = {
             # 文件后缀
             "fileExt": file_extension,

app/helper/wallpaper.py

@@ -1,5 +1,7 @@
 from typing import Optional, List
 
+from app.chain.mediaserver import MediaServerChain
+from app.chain.tmdb import TmdbChain
 from app.core.cache import cached
 from app.core.config import settings
 from app.utils.http import RequestUtils
@@ -11,6 +13,49 @@ class WallpaperHelper(metaclass=Singleton):
     def __init__(self):
         self.req = RequestUtils(timeout=5)
 
+    @staticmethod
+    def get_wallpaper() -> Optional[str]:
+        """
+        获取登录页面壁纸
+        """
+        if settings.WALLPAPER == "bing":
+            url = WallpaperHelper().get_bing_wallpaper()
+        elif settings.WALLPAPER == "mediaserver":
+            url = MediaServerChain().get_latest_wallpaper()
+        elif settings.WALLPAPER == "customize":
+            url = WallpaperHelper().get_customize_wallpaper()
+        else:
+            url = WallpaperHelper().get_tmdb_wallpaper()
+        return url
+
+    @staticmethod
+    def get_wallpapers(num: int = 10) -> List[str]:
+        """
+        获取登录页面壁纸列表
+        """
+        if settings.WALLPAPER == "bing":
+            return WallpaperHelper().get_bing_wallpapers(num)
+        elif settings.WALLPAPER == "mediaserver":
+            return MediaServerChain().get_latest_wallpapers(count=num)
+        elif settings.WALLPAPER == "customize":
+            return WallpaperHelper().get_customize_wallpapers(num)
+        else:
+            return WallpaperHelper().get_tmdb_wallpapers(num)
+
+    @cached(maxsize=1, ttl=3600)
+    def get_tmdb_wallpaper(self) -> Optional[str]:
+        """
+        获取TMDB每日壁纸
+        """
+        return TmdbChain().get_random_wallpager()
+
+    @cached(maxsize=1, ttl=3600)
+    def get_tmdb_wallpapers(self, num: int = 10) -> List[str]:
+        """
+        获取7天的TMDB每日壁纸
+        """
+        return TmdbChain().get_trending_wallpapers(num)
+
     @cached(maxsize=1, ttl=3600)
     def get_bing_wallpaper(self) -> Optional[str]:
         """