package com.atguigu.utils;

import com.alibaba.fastjson.JSON;
import com.atguigu.constant.MessageConstant;
import com.atguigu.constant.RedisUserConstant;
import com.atguigu.exception.BunnyException;
import com.atguigu.spzx.model.entity.user.UserInfo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;

@Component
public class RedisUtils {
    @Autowired
    private RedisTemplate<String, Object> redisTemplate;

    public static String getCartKey(Long userId) {
        return RedisUserConstant.REDIS_CART_KEY + userId;
    }

    /**
     * Redis通过token获取用户信息
     *
     * @param token 请求key的token
     * @return 用户信息
     */
    public UserInfo getUserInfo(String token) {
        // 获取用户信息字符串
        Object object = redisTemplate.opsForValue().get(token);
        String jsonString = JSON.toJSONString(object);
        if (StringUtils.isEmpty(jsonString)) {
            throw new BunnyException(MessageConstant.USER_DOES_NOT_EXIST);
        }
        // 转为UserInfo类
        return JSON.parseObject(jsonString, UserInfo.class);
    }
}