<?php
namespace App\Servers\Member;

use App\Models\UserModels\WxUser;

class UserServer
{

    /**
     * 单列对象
     * @var
     */
    private static $server = '';


    private function __construct(){

    }

    /**
     * 创建对象
     * @return UserServer
     */
    static function creatServer()
    {
        if(empty(self::$server)){
            self::$server = new UserServer();
        }
        return self::$server;
    }

    /**
     * 微信登陆
     * @param $wx_info
     * @return array|false
     */
    function setWxOpen($wx_info){
        //检查这个微信openid是否存在
        $user = WxUser::where('openid',$wx_info['openid'])->select(['id','openid','invite_code'])->find();
        if(!$user){//不存在就创建信息
            $invite_code = $this->randString();
            $member_info['invite_code'] = $invite_code;
            $member_info['openid'] = $wx_info['openid'];

            $member_info = WxUser::create($member_info);
            if (empty($member_info)) {
                return false;
            }

            $info = ['m_id' => $member_info->{'id'}, 't_code' => $invite_code];
        }else{
            $info = ['m_id' => $user->{'id'}, 't_code' => $user->{'invite_code'}];
        }

        return $info;
    }

    /**
     * 随机8位字符串
     * @return string
     */
    function randString()
    {
        $code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $rand = $code[rand(0,25)]
            .strtoupper(dechex(date('m')))
            .date('d').substr(time(),-5)
            .substr(microtime(),2,5)
            .sprintf('%02d',rand(0,99));
        for(
            $a = md5( $rand, true ),
            $s = '0123456789ABCDEFGHIJKLMNOPQRSTUV',
            $d = '',
            $f = 0;
            $f < 8;
            $g = ord( $a[ $f ] ),
            $d .= $s[ ( $g ^ ord( $a[ $f + 8 ] ) ) - $g & 0x1F ],
            $f++
        );
        return  $d;
    }
}