命令行工具 首购活动

def verify_promotion_code(user_id, promotion_code):
    # 假设数据库查询逻辑
    promotion = db.query(Promotion).filter_by(code=promotion_code).first()
    if promotion and not db.query(PromotionUsage).filter_by(user_id=user_id, promotion_id=promotion.id).first():
        # 如果优惠码有效且未被当前用户使用过
        return True
    return False

@app.route('/purchase', methods=['POST'])
def purchase():
    user_id = request.json.get('user_id')
    promotion_code = request.json.get('promotion_code')
    if verify_promotion_code(user_id, promotion_code):
        # 应用优惠逻辑
        apply_discount(promotion_code)
        return jsonify({"status": "success", "message": "优惠已应用"})
    else:
        return jsonify({"status": "error", "message": "无效或已使用的优惠码"})