<?php

/**
 * Namesilo DDNS
 * SSRPanel 2018/12/15
 * Usage:Add `crontab` Command：`* * * * * php /www/wwwroot/ddns_namesilo.php`
 */
class namesilo
{
    private $apiKey;
    private $domain;
    private $rrhost;

    function __construct()
    {
        $this->apiKey = 'c8082318267c813f91b36111'; // set your namesilo api key
        $this->domain = 'ssrpanel.com'; // set your domain
        $this->rrhost = 'hk'; // set your sub domain
    }

    function ddns()
    {
        $ip = $this->checkIP();
        if (false === $ip) {
            $this->log("IP NOT CHANGED");
            exit();
        }

        $recordList = $this->dnsListRecords();

        $rrid = '';
        foreach ($recordList['reply']['resource_record'] as $vo) {
            if ($vo['host'] == $this->rrhost . '.' . $this->domain) {
                $rrid = $vo['record_id'];
                break;
            }
        }

        $this->log($rrid);

        if ($rrid) {
            $this->dnsUpdateRecord($rrid, $this->rrhost, $ip);
        }

        exit();
    }

    function dnsListRecords()
    {
        $query = [
            'domain' => $this->domain
        ];

        return $this->send('dnsListRecords', $query);
    }

    function dnsUpdateRecord($rrid, $rrhost, $rrvalue, $ttl = 7207)
    {
        $query = [
            'domain'  => $this->domain,
            'rrid'    => $rrid,
            'rrhost'  => $rrhost,
            'rrvalue' => $rrvalue,
            'rrttl'   => $ttl
        ];

        return $this->send('dnsUpdateRecord', $query);
    }

    function getIP()
    {
        $result = $this->curl('http://ip.taobao.com/service/getIpInfo.php?ip=myip');
        $result = json_decode($result, true);

        return $result['data']['ip'];
    }

    function checkIP()
    {
        $nowIP = $this->getIP();

        $file = dirname(__FILE__) . '/ddns_namesilo.ip';
        $oldIP = file_get_contents($file);

        if ($nowIP == $oldIP) {
            return false;
        }

        file_put_contents($file, $nowIP);

        return $nowIP;
    }

    function send($operation, $data = [])
    {
        $params = [
            'version' => 1,
            'type'    => 'xml',
            'key'     => $this->apiKey
        ];
        $query = array_merge($params, $data);

        $result = $this->curl('https://www.namesilo.com/api/' . $operation . '?' . http_build_query($query));
        $result = $this->xmlToArray($result);
        $this->log($result);

        return $result;
    }

    function log($data)
    {
        $data = is_array($data) ? var_export($data, true) : $data;
        $file = dirname(__FILE__) . '/ddns_namesilo.log';
        file_put_contents($file, $data . "\r\n", FILE_APPEND);
    }

    function xmlToArray($xml)
    {
        libxml_disable_entity_loader(true);
        $result = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);

        return $result;
    }

    function curl($url, $data = [])
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, 500);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_URL, $url);

        if ($data) {
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
        }

        $result = curl_exec($ch);
        curl_close($ch);

        return $result;
    }
}

$namesilo = new namesilo();
$dnsListRecords = $namesilo->ddns();