Sindbad~EG File Manager

<?php
/**
 * @package         Regular Labs Library
 * @version         23.2.18739
 * 
 * @author          Peter van Westen <info@regularlabs.com>
 * @link            http://regularlabs.com
 * @copyright       Copyright © 2023 Regular Labs All Rights Reserved
 * @license         http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
 */

use RegularLabs\Library\FieldGroup;

defined('_JEXEC') or die;

if ( ! is_file(JPATH_LIBRARIES . '/regularlabs/autoload.php'))
{
    return;
}

require_once JPATH_LIBRARIES . '/regularlabs/autoload.php';

// If controller.php exists, assume this is K2 v3
defined('RL_K2_VERSION') or define('RL_K2_VERSION', file_exists(JPATH_ADMINISTRATOR . '/components/com_k2/controller.php') ? 3 : 2);

class JFormFieldRL_K2 extends FieldGroup
{
    public $type = 'K2';

    public function getCategories()
    {
        $state_field = RL_K2_VERSION == 3 ? 'state' : 'published';

        $query = $this->db->getQuery(true)
            ->select('COUNT(*)')
            ->from('#__k2_categories AS c')
            ->where('c.' . $state_field . ' > -1');
        $this->db->setQuery($query);
        $total = $this->db->loadResult();

        if ($total > $this->max_list_count)
        {
            return -1;
        }

        $parent_field   = RL_K2_VERSION == 3 ? 'parent_id' : 'parent';
        $title_field    = RL_K2_VERSION == 3 ? 'title' : 'name';
        $ordering_field = RL_K2_VERSION == 3 ? 'lft' : 'ordering';

        $query->clear('select')
            ->select('c.id, c.' . $parent_field . ' AS parent_id, c.' . $title_field . ' AS title, c.' . $state_field . ' AS published');
        if ( ! $this->get('getcategories', 1))
        {
            $query->where('c.' . $parent_field . ' = 0');
        }
        $query->order('c.' . $ordering_field . ', c.' . $title_field);
        $this->db->setQuery($query);
        $items = $this->db->loadObjectList();

        return $this->getOptionsTreeByList($items);
    }

    public function getItems()
    {
        $state_field = RL_K2_VERSION == 3 ? 'state' : 'published';

        $query = $this->db->getQuery(true)
            ->select('COUNT(*)')
            ->from('#__k2_items AS i')
            ->where('i.' . $state_field . ' > -1');
        $this->db->setQuery($query);
        $total = $this->db->loadResult();

        if ($total > $this->max_list_count)
        {
            return -1;
        }

        $cat_title_field = RL_K2_VERSION == 3 ? 'title' : 'name';

        $query->clear('select')
            ->select('i.id, i.title as name, c.' . $cat_title_field . ' as cat, i.' . $state_field . ' as published')
            ->join('LEFT', '#__k2_categories AS c ON c.id = i.catid')
            ->group('i.id')
            ->order('i.title, i.ordering, i.id');
        $this->db->setQuery($query);
        $list = $this->db->loadObjectList();

        return $this->getOptionsByList($list, ['cat', 'id']);
    }

    public function getTags()
    {
        $state_field = RL_K2_VERSION == 3 ? 'state' : 'published';

        $query = $this->db->getQuery(true)
            ->select('t.name as id, t.name as name')
            ->from('#__k2_tags AS t')
            ->where('t.' . $state_field . ' = 1')
            ->where('t.name != ' . $this->db->quote(''))
            ->group('t.name')
            ->order('t.name');
        $this->db->setQuery($query);
        $list = $this->db->loadObjectList();

        return $this->getOptionsByList($list);
    }

    protected function getInput()
    {
        $error = $this->missingFilesOrTables(['categories', 'items', 'tags']);
        if ($error)
        {
            return $error;
        }

        return $this->getSelectList();
    }
}