# myapp/services/course_service.py
from flask import current_app

# 假设你已有这两个 loader
from db.course import load_course_from_json

def load_course(course_id: str):
    return load_course_from_json(
        course_id, course_data_dir=current_app.config["COURSE_DATA_DIR"]
    )

def user_selected_course_briefs(user_obj):
    """根据用户对象的选课列表，拼装课程简要信息数组"""
    course_list = current_app.extensions["course_list"]
    briefs = []
    for cid in getattr(user_obj, "select_course", []):
        course_obj = load_course(cid)
        brief = course_list.get_course_brief_info(cid, course_obj)
        briefs.append(brief)
    return briefs