<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2017 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\HTML\Helpers;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Language\LanguageHelper;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Object\CMSObject;

/**
 * Utility class working with administrator language select lists
 *
 * @since  3.8.0
 */
abstract class AdminLanguage
{
	/**
	 * Cached array of the administrator language items.
	 *
	 * @var    array
	 * @since  3.8.0
	 */
	protected static $items = null;

	/**
	 * Get a list of the available administrator language items.
	 *
	 * @param   boolean  $all        True to include All (*)
	 * @param   boolean  $translate  True to translate All
	 *
	 * @return  array
	 *
	 * @since   3.8.0
	 */
	public static function existing($all = false, $translate = false)
	{
		if (empty(static::$items))
		{
			$languages       = array();
			$admin_languages = LanguageHelper::getKnownLanguages(JPATH_ADMINISTRATOR);

			foreach ($admin_languages as $tag => $language)
			{
				$languages[$tag] = $language['nativeName'];
			}

			ksort($languages);

			static::$items = $languages;
		}

		if ($all)
		{
			$all_option = array(new CMSObject(array('value' => '*', 'text' => $translate ? Text::alt('JALL', 'language') : 'JALL_LANGUAGE')));

			return array_merge($all_option, static::$items);
		}
		else
		{
			return static::$items;
		}
	}
}
