<?php
/**
 * @package         Regular Labs Library
 * @version         23.10.17780
 * 
 * @author          Peter van Westen <info@regularlabs.com>
 * @link            https://regularlabs.com
 * @copyright       Copyright © 2023 Regular Labs All Rights Reserved
 * @license         GNU General Public License version 2 or later
 */

namespace RegularLabs\Library;

defined('_JEXEC') or die;

use Joomla\CMS\Factory as JFactory;
use Joomla\CMS\Layout\FileLayout as JFileLayout;

class DownloadKey
{
    /**
     * @param string $extension
     */
    public static function get($update = true)
    {
        $db    = DB::get();
        $query = DB::getQuery()
            ->select('extra_query')
            ->from('#__update_sites')
            ->where(DB::like(DB::quoteName('extra_query'), 'k=%'))
            ->where(DB::like(DB::quoteName('location'), '%download.regularlabs.com%'));

        $db->setQuery($query);

        $key = $db->loadResult();

        if ( ! $key)
        {
            return '';
        }

        RegEx::match('#k=([a-zA-Z0-9]{8}[A-Z0-9]{8})#', $key, $match);

        if ( ! $match[1])
        {
            return '';
        }

        $key = $match[1];

        if ($update)
        {
            self::store($key);
        }

        return $key;
    }

    /**
     * @param string $extension
     */
    public static function getOutputForComponent($extension = 'all', $use_modal = true, $hidden = true, $callback = '')
    {
        $id = 'downloadkey_' . strtolower($extension);

        Document::script('regularlabs.script');
        Document::script('regularlabs.downloadkey');

        return (new JFileLayout(
            'regularlabs.form.field.downloadkey',
            JPATH_SITE . '/libraries/regularlabs/layouts'
        ))->render(
            [
                'id'         => $id,
                'extension'  => strtolower($extension),
                'use_modal'  => $use_modal,
                'hidden'     => $hidden,
                'callback'   => $callback,
                'show_label' => true,
            ]
        );
    }

    /**
     * @param string $key
     */
    public static function isValid($key, $extension = 'all')
    {
        $key = trim($key);

        if ( ! self::isValidFormat($key))
        {
            return json_encode([
                'valid'  => false,
                'active' => false,
            ]);
        }

        $cache = new Cache;
        $cache->useFiles(1);

        if ($cache->exists())
        {
            return $cache->get();
        }

        $result = Http::getFromUrl('https://download.regularlabs.com/check_key.php?k=' . $key . '&e=' . $extension);

        return $cache->set($result);
    }

    /**
     * @param string $key
     */
    public static function isValidFormat($key)
    {
        $key = trim($key);

        if ($key === '')
        {
            return true;
        }

        if (strlen($key) != 16)
        {
            return false;
        }

        return RegEx::match('^[a-zA-Z0-9]{8}[A-Z0-9]{8}$', $key, $match, 's');
    }

    /**
     * @param string $extension
     */
    public static function store($key)
    {
        if ( ! self::isValidFormat($key))
        {
            return false;
        }

        $query = DB::getQuery()
            ->update('#__update_sites')
            ->set(DB::is('extra_query', ''))
            ->where(DB::like(DB::quoteName('location'), '%download.regularlabs.com%'));

        DB::get()->setQuery($query)->execute();

        $extra_query = $key ? 'k=' . $key : '';

        $query = DB::getQuery()
            ->update('#__update_sites')
            ->set(DB::is('extra_query', $extra_query))
            ->where(DB::like(DB::quoteName('location'), '%download.regularlabs.com%'))
            ->where(DB::combine([
                DB::like(DB::quoteName('location'), '%&pro=%'),
                DB::like(DB::quoteName('location'), '%e=extensionmanager%'),
            ], 'OR'));

        $result = DB::get()->setQuery($query)->execute();

        JFactory::getCache()->clean('_system');

        return $result;
    }
}