<?php

namespace app\admin\controller;

use app\admin\model\AdminLog;
use app\common\controller\Backend;
use think\Config;
use think\Db;
use think\Hook;
use think\Session;
use think\Validate;

/**
 * 公众号扫一扫功能
 */
class Officialaccount extends Backend
{
    protected $noNeedLogin = ['login'];
    protected $noNeedRight = ['index', 'logout'];
    protected $layout = '';

    public function _initialize()
    {
        parent::_initialize();
        //移除HTML标签
        $this->request->filter('trim,strip_tags,htmlspecialchars');
    }

    public function index(){
        echo '测试连接成功';
    }


    /**
     *1.服务器接口，微信公众平台填写的url
     * http://域名/控制器/link
     */
    public function link(){
        $echostr=$_GET['echostr'];//微信服务器提供的 随机字符串
        if ($this->check()){//验证签名是否正确
            echo $echostr;
            exit;
        }
    }

    /**
     * 2.验证签名
     */
    public function check(){
        $signature=$_GET['signature'];  //微信服务器提供的 微信加密签名
        $timestamp=$_GET['timestamp'];  //微信服务器提供的 时间戳
        $nonce=$_GET['nonce'];          //微信服务器提供的 随机数
        $token='z9EGslrxPpbicuy48mkw';  //自己定义的 Token
        $tmpArr = array($token,$timestamp,$nonce);//数组
        sort($tmpArr);           //排序
        $tmpstr=implode($tmpArr);       //数据转字符串
        $tmpstr=sha1($tmpstr);          //字符串加密
        if ($tmpstr==$signature){
            return true;
        }else{
            return false;
        }
    }


    /**
     * 获取access_token存进数据库
    */
    public function access_token(){
        $token = Db::name("v_access_token")->find(1);
        $date = date('Y-m-d H:i:s');
        if (strtotime($token['addtime']) > strtotime($date)){
            return $token['access_token'];
        }else{
            $appid = "你的appid";
            $appsecret = "你的appsecret ";
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$appid}&secret={$appsecret}";
            $rt = $this->request_get($url);
            $data['access_token']=$rt['access_token'];
            $data['addtime']= date("Y-m-d H:i:s", strtotime("$date +60 min"));
            $rt =DB::name("v_access_token")->where("id='1'")->save($data);
            if ($rt){
                $token = Db::name("v_access_token")->find(1);
                return $token['access_token'];
            }else{
                return "获取access_token错误";
            }
        }
    }

    /**
     * 3.发送http请求，并返回数据
     * @param $url
     * @return mixed
     */
    public function request_get($url){
        $curl = curl_init();// 1. 初始化一个 cURL 对象
        curl_setopt($curl,CURLOPT_URL,$url);// 2.设置你需要抓取的URL
        curl_setopt($curl,CURLOPT_HEADER,0);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1 );// 3.https必须加这个，不加不好使（不多加解释，东西太多了
        curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10);
        $res = curl_exec($curl);// 5. 运行cURL，请求网页
        curl_close($curl);// 6. 关闭URL请求
        $json_obj = json_decode($res,true);
        return $json_obj;
    }


    public function user(){
        //1.用户点击静默授权链接 获取用户的code
        $code = input("code");
        //2.通过code换取网页授权access_token
        $url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=$this->appid&secret=$this->appsecret&code={$code}&grant_type=authorization_code";
        $rt = $this->request_get($url);
        //拿着access_token换取用户信息
        if (!empty($rt['access_token'])) {
            Session('access_token', $rt['access_token'], 7200);
            Session('openid', $rt['openid'], 7200);
        }
        $access_token = Session('access_token');
        $openid = Session('openid');
        //3.获取用户基本信息
        $url = "https://api.weixin.qq.com/sns/userinfo?access_token={$access_token}&openid={$openid}&lang=zh_CN";
        $user_url = $this->request_get($url);
        $openid = $user_url['openid'];
        if($openid){
            $user = Db::name('v_user')->where("openid='$openid'")->find();
            if (!$user){
                $data['openid'] = $user_url['openid'];//用户openid
                $data['nickname'] = $user_url['nickname'];//用户名字
                $data['headimgurl'] = $user_url['headimgurl'];//用户头像
                $data['sex'] = $user_url['sex'];//用户性别
                $data['addtime'] = date('Y-m-d H:i:s');
                Db::name('v_user')->add($data);
            }//数据库没有用户信息添加到数据库mn_user用户表
        }else{
            $this->error('请使用手机进入',U('index'));
        }
    }


}