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<?php
/**
 * @package         Regular Labs Library
 * @version         23.9.3039
 * 
 * @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
 */

defined('_JEXEC') or die;

use Joomla\CMS\Language\Text as JText;
use Joomla\Registry\Registry;
use RegularLabs\Library\Field;

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

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

class JFormFieldRL_GroupLevel extends Field
{
    public $type = 'GroupLevel';

    public function getAjaxRaw(Registry $attributes)
    {
        $name     = $attributes->get('name', $this->type);
        $id       = $attributes->get('id', strtolower($name));
        $value    = $attributes->get('value', []);
        $size     = $attributes->get('size');
        $multiple = $attributes->get('multiple');

        $options = $this->getOptions(
            (bool) $attributes->get('show_all'),
            (bool) $attributes->get('use_names')
        );

        return $this->selectList($options, $name, $value, $id, $size, $multiple);
    }

    protected function getInput()
    {
        $size      = (int) $this->get('size');
        $multiple  = $this->get('multiple');
        $show_all  = $this->get('show_all');
        $use_names = $this->get('use_names');

        return $this->selectListAjax(
            $this->type, $this->name, $this->value, $this->id,
            compact('size', 'multiple', 'show_all', 'use_names')
        );
    }

    protected function getOptions($show_all = false, $use_names = false)
    {
        $options = $this->getUserGroups($use_names);

        if ($show_all)
        {
            $option          = (object) [];
            $option->value   = -1;
            $option->text    = '- ' . JText::_('JALL') . ' -';
            $option->disable = '';
            array_unshift($options, $option);
        }

        return $options;
    }

    protected function getUserGroups($use_names = false)
    {
        $value = $use_names ? 'a.title' : 'a.id';

        $query = $this->db->getQuery(true)
            ->select($value . ' as value, a.title as text, a.parent_id AS parent')
            ->from('#__usergroups AS a')
            ->select('COUNT(DISTINCT b.id) AS level')
            ->join('LEFT', '#__usergroups AS b ON a.lft > b.lft AND a.rgt < b.rgt')
            ->group('a.id')
            ->order('a.lft ASC');
        $this->db->setQuery($query);

        return $this->db->loadObjectList();
    }
}