acf

plugins/system/nrframework/fields/nrgrouplevel.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * @author          Tassos Marinos <info@tassos.gr>
+ * @link            https://www.tassos.gr
+ * @copyright       Copyright © 2024 Tassos All Rights Reserved
+ * @license         GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
+ */
+
+defined('_JEXEC') or die;
+
+require_once __DIR__ . '/treeselect.php';
+
+class JFormFieldNRGroupLevel extends JFormFieldNRTreeSelect
+{
+	/**
+	 * A helper to get the list of user groups.
+	 * Logic from administrator\components\com_config\model\field\filters.php@getUserGroups
+	 * 
+	 * @return	object
+	 */
+	protected function getOptions()
+	{
+		// Get a database object.
+		$db = $this->db;
+
+		// Get the user groups from the database.
+		$query = $db->getQuery(true)
+			->select('a.id AS value, a.title AS text, COUNT(DISTINCT b.id) AS level')
+			->from('#__usergroups AS a')
+			->join('LEFT', '#__usergroups AS b on a.lft > b.lft AND a.rgt < b.rgt')
+			->group('a.id, a.title, a.lft')
+			->order('a.lft ASC');
+		$db->setQuery($query);
+
+		return $db->loadObjectList();
+	}
+}