Version 0.1.1 rise to flask app factory

Html/apps/services/user_service.py

@@ -0,0 +1,42 @@
+# myapp/services/user_service.py
+import os
+from typing import Tuple
+from flask import current_app, session
+
+# 假设你已有这两个 loader
+from db.user import load_user_from_json
+
+def _username_from_session() -> str:
+    """通过 session['user_id'] -> username"""
+    user_uuid = session.get("user_id")
+    if not user_uuid:
+        return None
+    uuid2username = current_app.extensions["uuid2username"]
+    return uuid2username.get(user_uuid)
+
+def get_or_load_current_user():
+    """
+    返回当前用户对象（如 user_id2UserClass 中没有则从 JSON 载入并缓存）
+    """
+    user_uuid = session.get("user_id")
+    if not user_uuid:
+        return None
+
+    username = _username_from_session()
+    if not username:
+        return None
+
+    user_map = current_app.extensions["user_id2UserClass"]
+    if user_uuid not in user_map:
+        user_map[user_uuid] = load_user_from_json(
+            username, user_data_dir=current_app.config["USER_DATA_DIR"]
+        )
+    return user_map[user_uuid]
+
+def add_course_for_current_user(course_id: str, course_data):
+    user_obj = get_or_load_current_user()
+    if user_obj is None:
+        return False
+    # 你的 UserClass 应该有 select_new_course 接口
+    user_obj.select_new_course(course_id, course_data)
+    return True