<?php

namespace Repository;

/**
 * IP限制服务
 * Class IpRepositories
 * @package repositories
 */
class IpRepository
{
    /**
     * 检测是否在白名单内，否则拒绝访问
     * 
     * @return void
     */
    public function ipAccess(){
        $ip = $this->getRemoteIp();
        if(!empty($ip)) {
            $ipWhite = db('ip_whitelist')->where(['ip_addr' => $ip])->find();
            if($ipWhite){
                return true;
            }
        }
        return false;
        
    }


    /**
     * 获取用户的IP
     * 
     * @return void
     */
    public function getRemoteIp(){
        if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])){
            $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
        }elseif(isset($_SERVER['HTTP_CLIENT_IP'])){
            $ip = $_SERVER['HTTP_CLIENT_IP'];
        }elseif(getenv('HTTP_X_FORWARDED_FOR')){
            $ip = getenv('HTTP_X_FORWARED_FOR');
        }elseif(getenv('HTTP_CLIENT_IP')){
            $ip = getenv('HTTP_CLIENT_IP');
        }elseif($_SERVER['REMOTE_ADDR']){
            $ip = $_SERVER['REMOTE_ADDR'];
        }else{
            $ip = null;
        }
        return $ip;
    }
}