package com.lyms.talkonlineweb.util;

import lombok.extern.log4j.Log4j2;

import java.util.HashMap;
import java.util.Map;

/**
 * @ProjectName: talkonline
 * @Package: com.lyms.talkonlineweb.util
 * @ClassName: WeiXinUtil
 * @Author: lqy
 * @Description: 微信接口调用
 * @Date: 2021-09-13 18:10
 * @Version:
 */
@Log4j2
public class WeiXinUtil {
    //微信返回的key定义
    private static final String OPEN_ID_KEY = "openid";
    /**
     * 获取微信用户的openid
     *
     * @param code 登录时获取的code
     * @return 微信方获取openid
     */
    public static String getWxOpenId(String code) {
        if (StringUtil.isEmpty(code)) {
            return null;
        }
        try {
            StringBuilder reqUrl = new StringBuilder();
            reqUrl.append("/sns/jscode2session?appid=").append(Constant.PAT_APP_ID).
            append("&secret="). append(Constant.WX_SECRET).append("&js_code=").append(code).
            append("&grant_type=").append(Constant.GRANT_TYPE);
            log.info("getWxOpenId url : {}",reqUrl);
            String response = HttpUtil.getData(Constant.WEIXIN_SERVER + reqUrl);

            log.info("getWxOpenId jscode2session response : {}" , response);
            if (StringUtil.isNotEmpty(response))
            {
                Map<String, Object> result = JsonUtil.str2Map(response, HashMap.class);
                if (result.containsKey(OPEN_ID_KEY))
                {
                    return result.get(OPEN_ID_KEY).toString();
                }
            }
        } catch (Exception e) {
            log.error("getWxOpenId by code: {}", code, e);
        }
        return null;
    }

}