fix mixuebingcheng matcher and file router

nonebot_plugin_whateat_pic/random_pic.py

@@ -0,0 +1,20 @@
+import secrets
+from pathlib import Path
+from typing import Literal
+
+from .config import config
+
+
+def random_pic(menu_type: Literal["drink", "eat", "me"]) -> tuple[Path, str]:
+    """
+    随机获取一张图片
+    """
+    if menu_type not in ["drink", "eat", "me"]:
+        raise ValueError("menu_type must be 'drink' or 'eat'")
+
+    menu_dir = Path(config.whatpic_res_path) / f"{menu_type}_pic"
+    pic_list = [entry.name for entry in menu_dir.iterdir() if entry.is_file()]
+
+    pic_name = secrets.choice(pic_list)
+    pic_path = Path(config.whatpic_res_path) / f"{menu_type}_pic" / pic_name
+    return pic_path, pic_name.split(".")[0]