<?php

namespace ThurData\Servers\KerioEmail\Core\Helper;

require_once '/usr/share/php/Net/DNS2.php';
use \Net\DNS2\Net_DNS2_Resolver as Net_DNS2_Resolver;

/**
 * Wrapper for WHMCS params passed to controler functions
 *
 * @autor ThurData <info@thurdata.ch>
 */
class DnsHelper
{
    const NS1 = '185.163.51.130';
    const NS2 = '185.163.51.131';
    const SPF = 'v=spf1 mx a:mail3.seecure.ch ip4:185.163.51.0/24 ip4:89.35.78.0/23 ~all';
    const DMARC = 'v=DMARC1; p=reject; rua=mailto:technik@thurdata.ch; ruf=mailto:technik@thurdata.ch';
    public static function KerioEmailCheckDNS($params, $nameserver)
    {
        unset($zoneID);
        unset($mxStatus);
        unset($dnsData);
        unset($vars);
        $vars['maildomain'] = $params['domain'];
        $clientDomains = localAPI('GetClientsDomains', array('clientid' => $params['userid']));


        logModuleCall(
    		'kerioEmail',
	    	__FUNCTION__,
            $params,
    		'Debug',
	    	$nameserver
    	);

        $nameserver = array(
            NS1,
            NS2);
        
        $resolver = new \Net_DNS2_Resolver(array('nameservers' => $nameserver));
        try {
                $result = $resolver->query($params['domain'], 'MX');
                
        } catch(\Net_DNS2_Exception $e) {
                
                echo "::query() failed: ", $e->getMessage(), "\n";
        }
        $domainMX = $result->answer;
        try {
            $result = $resolver->query($params['domain'], 'TXT');
            
        } catch(\Net_DNS2_Exception $e) {
                
                echo "::query() failed: ", $e->getMessage(), "\n";
        }
        $domainTXT = $result->answer;
        $domainSPF = array();
        $domainDKIM = array();
        $domainDMARC = array();
        foreach($domainTXT as $txtRecord) {
            foreach($txtRecord->text as $txtData) {
                if(strstr($txtData,'v=spf')) {
                    array_push($domainSPF,$txtData);
                }
                if(strstr($txtData,'v=DKIM')) {
                    array_push($domainDKIM,$txtData);
                }
                if(strstr($txtData,'v=DMARC')) {
                    array_push($domainDMARC,$txtData);
                }
            }
        }
        # self hosted DNS
        $vars['selfDNS'] = FALSE;
        if(!empty($clientDomains['domains'])) {
            for($i=$clientDomains['startnumber'];$i<=$clientDomains['numreturned'];$i++) {
                if($params['domain'] == $clientDomains['domains']['domain'][$i]['domainname']) {
                    $vars['selfDNS'] = TRUE;
                    $vars['domainId'] = $clientDomains['domains']['domain'][$i]['id'];
                }
            }
        }
        # SPF
        if (count($domainSPF) > 1) {
            $vars['multiSPF'] = TRUE;
        } else {
            $vars['multiSPF'] = FALSE;
        }
        $vars['spf'] = 'wrong';
        if (empty($domainSPF)) {
            $vars['spf'] = 'unset';
        } else {        
            foreach($domainSPF as $spf) {
                if($spf === SPF) {
                    $vars['spf'] = 'set';
                }
            }
        }
        $vars['domainSPF'] = $domainSPF;
        # DKIM
        if (count($domainDKIM) > 1) {
            $vars['multiDKIM'] = TRUE;
        } else {
            $vars['multiDKIM'] = FALSE;
        }
        if (empty($domainDKIM)) {
            $vars['dkim'] = 'unset';
        } else {        
            $vars['dkim'] = 'set';
        }
        $vars['domainDKIM'] = $domainDKIM;
        # DMARC
        if (count($domainDMARC) > 1) {
            $vars['multiDMARC'] = TRUE;
        } else {
            $vars['multiDMARC'] = FALSE;
        }
        $vars['dmarc'] = 'wrong';
        if (empty($domainDMARC)) {
            $vars['dmarc'] = 'unset';
        } else {        
            foreach($domainDMARC as $dmarc) {
                if($dmarc === DMARC) {
                    $vars['dmarc'] = 'set';
                }
            }
        }
        $vars['domainDMARC'] = $domainDMARC;
        # MX
        if(count($domainMX) > 1) {
            $vars['multiMX'] = TRUE;
        } else {
            $vars['multiMX'] = FALSE;
        }
        if(empty($domainMX)){
            $vars['mx'] = 'unset';
            $vars['mxtarget'] = $params['serverhostname'];
        } else {
            $vars['domainMX'] = $domainMX;
            $domainMXrecord = array_shift($domainMX);
            $vars['mxtarget'] = $domainMXrecord->exchange;
            if($domainMXrecord->exchange == $params['serverhostname']) {
                $vars['mx'] = 'set';
            } else {
                $var['mx'] = 'wrong';
            }
        }
        return $vars;
    }
}