package com.ynxbd.wx.wxfactory.utils;

import com.ynxbd.wx.wxfactory.bean.event.WxEvent;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.digest.DigestUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.Arrays;

@Slf4j
public class WxEventHelper {

    /**
     * 过滤内容可以直接返回
     *
     * @param wxEvent 事件
     */
    public static boolean filter(WxEvent wxEvent) {
        String event = wxEvent.getEvent();
        if (event != null) {
            event = event.toUpperCase();
        }
        String msgType = wxEvent.getMsgType();
        if (msgType != null) {
            msgType = msgType.toUpperCase();
        }
        if ("VIEW".equals(event) && "EVENT".equals(msgType)) { // 点击菜单
            return true;
        }

        if ("TEMPLATESENDJOBFINISH".equals(event)) { // 模板发送作业完成-->直接返回success
            log.warn("[公众号]模板消息推送 fromUserName={}, msgType={}, eventKey={}, event={}", wxEvent.getFromUserName(), msgType, wxEvent.getEventKey(), event);
            return true;
        }
        return false;
    }


    /**
     * 消息验签
     *
     * @param request request
     * @param wxToken wxToken
     */
    public static boolean verifyEventSign(HttpServletRequest request, String wxToken) {
        String nonce = request.getParameter("nonce");
        String timestamp = request.getParameter("timestamp");

        String[] array = new String[]{wxToken, timestamp, nonce};
        Arrays.sort(array);

        StringBuilder sb = new StringBuilder();
        for (String s : array) {
            sb.append(s);
        }
        return DigestUtils.sha1Hex(sb.toString()).equals(request.getParameter("signature"));
    }
}