whmcsDNSManager/modules/addons/DNSManager2/mgLibs/custom/dns/Core.php

<?php

namespace MGModule\DNSManager2\mgLibs\custom\dns;
use MGModule\DNSManager2 as main;

class Core
{

    /**
     *
     * @return Strategy
     * @throws exceptions\DNSException
     */
    public static function getModule($module) {
        if(!class_exists($module)) {
            $path = __DIR__ . DIRECTORY_SEPARATOR . 'submodules' . DIRECTORY_SEPARATOR . $module . '.php';
            if(file_exists($path) )
                require_once $path;
            else
                throw new exceptions\DNSException("Module file ($path) not found");
        }

        $module = __NAMESPACE__ . '\\submodules\\' . $module;

        return new Strategy(new $module());
    }

    public static function getAvailableSubmodules() {
        if(!file_exists(__DIR__ . DS . 'submodules')) return array();
        $di = new \DirectoryIterator(__DIR__ . DS . 'submodules');
        $out = array();
        foreach (new \IteratorIterator($di) as $file) {
            if($file->isFile() && $file->getExtension() == 'php')
                $out[] = $file->getBasename('.php');
        }
        sort($out);
        return $out;
    }

    public static function getAvailableRecordTypes()
    {
        if(!file_exists(__DIR__.DS.'record'.DS.'type'))
        {
            return array();
        }

        $dir = new \DirectoryIterator(__DIR__.DS.'record'.DS.'type');
        $out = array();

        foreach(new \IteratorIterator($dir) as $file)
        {
            if($file->isFile() && $file->getExtension() == 'php')
            {
                $out[] = $file->getBasename('.php');
            }
        }

        $out = array_diff($out, array('OldDNS', 'RecordTypeAbstract', 'Def'));
        sort($out);

        return $out;
    }


    /* 
     * return record types list only for active servers
     * @return array
     */
    public static function getAvailableRecordTypesByActiveServers()
    {
        $avalibleRecordTypes = array();
        $rep = main\models\custom\server\Repository::factory()->onlyActive();
        $activeServers = $rep->get();

        foreach($activeServers as $server)
        {
            $submodule = $server->getModule();
            $tmpTypes = $submodule->availableTypes;
            $avalibleRecordTypes = array_unique(array_merge($avalibleRecordTypes, $tmpTypes));
        }

        return $avalibleRecordTypes;
    }
}