<?php

namespace app\api\controller;

use app\common\model\Config;
use think\Db;
use think\Request;
use app\common\model\User as Users;
use think\facade\Validate;
use app\common\controller\Api;


class Wx extends Api
{
    //微信授权消息
    public function sendmessage(){
        if (isset($_GET['echostr'])) {          //校验服务器地址URL
            self::valid();
        }
        $img = Db::name('config')->where('name','bot_img')->value('value');
        $img = str_replace('http://'.$_SERVER['SERVER_NAME'],'',$img);
        $postStr = file_get_contents('php://input');   //此处推荐使用file_get_contents('php://input')获取后台post过来的数据
        if (!empty($postStr) && is_string($postStr)) {
            $postArr = json_decode($postStr, true);
            if ($postArr['MsgType'] == 'event' && $postArr['Event'] == 'user_enter_tempsession') { //用户进入客服后马上回复，现在已失效,需要用户先发过消息
                $fromUsername = $postArr['FromUserName'];                           //发送者openid
                $imgurl = $img;                                           //公众号二维码,相对路径,修改为自己的
                $media_id = self::getMediaId($imgurl);                                    //获取图片消息的media_id
                $data = array(
                    "touser" => $fromUsername,
                    "msgtype" => "image",
                    "image" => array("media_id" => $media_id)
                );
                $json = json_encode($data, JSON_UNESCAPED_UNICODE);  //php5.4+
                self::requestAPI($json);
            }elseif ($postArr['MsgType'] !== 'event') {        //用户发送其他内容,引导加客服
                $fromUsername = $postArr['FromUserName'];                           //发送者openid
                $imgurl = $img;                                           //公众号二维码,相对路径,修改为自己的
                $media_id = self::getMediaId($imgurl);                                    //获取图片消息的media_id
                $data = array(
                    "touser" => $fromUsername,
                    "msgtype" => "image",
                    "image" => array("media_id" => $media_id)
                );
                $json = json_encode($data, JSON_UNESCAPED_UNICODE);  //php5.4+
                self::requestAPI($json);
            }

        } else {
            echo "empty";
            exit;
        }
    }

    public static function valid()
    {
        $echoStr = $_GET["echostr"];
        if (self::checkSignature()) {
            header('content-type:text');
            echo $echoStr;
            exit;
        } else {
            echo $echoStr . '+++' . 'k8h5qu8znxxxxxxjazm76';
            exit;
        }
    }

    public static function checkSignature()
    {
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];

        $token = 'k8h5qu8znxxxxxxjazm76';
        $tmpArr = array($token, $timestamp, $nonce);
        sort($tmpArr, SORT_STRING);
        $tmpStr = implode($tmpArr);
        $tmpStr = sha1($tmpStr);

        if ($tmpStr == $signature) {
            return true;
        } else {
            return false;
        }
    }

    public static function requestAPI($json)
    {
        $access_token = self::get_accessToken();
        /*
         * POST发送https请求客服接口api
         */
        $url = "https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token=" . $access_token;
        //以'json'格式发送post的https请求
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_POST, 1); // 发送一个常规的Post请求
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        if (!empty($json)) {
            curl_setopt($curl, CURLOPT_POSTFIELDS, $json);
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        //curl_setopt($curl, CURLOPT_HTTPHEADER, $headers );
        $output = curl_exec($curl);
        if (curl_errno($curl)) {
            echo 'Errno' . curl_error($curl);//捕抓异常
        }
        curl_close($curl);
        if ($output == 0) {
            echo 'success';
            exit;
        }
    }

    /* 调用微信api，获取access_token，有效期7200s*/
    public static function get_accessToken()
    {
        $appid = Config::get_values('wechat_appid');
        $secret = Config::get_values('wechat_appsecret');
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$secret.""; //替换成自己的小程序id和secret
        @$weixin = file_get_contents($url);
        @$jsondecode = json_decode($weixin);
        @$array = get_object_vars($jsondecode);
        $token = $array['access_token'];
        return $token;
    }

//获取上传图片的media_id
    public static function getMediaId($imgurl)
    {
        $token = self::get_accessToken();
        $url = "https://api.weixin.qq.com/cgi-bin/media/upload?access_token={$token}&type=image";
        // echo $url;
        $ch1 = curl_init();
        $timeout = 10;
        $real_path = "{$_SERVER['DOCUMENT_ROOT']}$imgurl";//自动转成图片文件绝对路径,如果图片发送失败,检查PHP的$_SERVER['DOCUMENT_ROOT'的配置

//     echo $real_path;
        $data = array("media" => new \CURLFile("{$real_path}"));//php5.6(含)以上版本使用此方法
        // print_r($data);
        curl_setopt($ch1, CURLOPT_URL, $url);
        curl_setopt($ch1, CURLOPT_POST, 1);
        curl_setopt($ch1, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch1, CURLOPT_CONNECTTIMEOUT, $timeout);
        curl_setopt($ch1, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch1, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch1, CURLOPT_POSTFIELDS, $data);
        $result = curl_exec($ch1);
        //print_r( $result);
        curl_close($ch1);
        if ($result) {
            $result = json_decode($result, true);
            return $result['media_id'];
        } else {
            return null;
        }
    }


}