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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2016 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Form\Field;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\Filesystem\Path;
use Joomla\CMS\Language\Text;

/**
 * Form Field class for the Joomla Framework.
 *
 * @since  2.5.0
 */
class AliastagField extends ListField
{
	/**
	 * The field type.
	 *
	 * @var    string
	 * @since  3.6
	 */
	protected $type = 'Aliastag';

/**
	 * Method to get a list of options for a list input.
	 *
	 * @return	array  An array of JHtml options.
	 *
	 * @since   3.6
	 */
	protected function getOptions()
	{
		// Get list of tag type alias
		$db    = Factory::getDbo();
		$query = $db->getQuery(true)
			->select(
				[
					'DISTINCT ' . $db->quoteName('type_alias', 'value'),
					$db->quoteName('type_alias', 'text'),
				]
			)
			->from($db->quoteName('#__contentitem_tag_map'));
		$db->setQuery($query);

$options = $db->loadObjectList();

$lang = Factory::getLanguage();

foreach ($options as $i => $item)
		{
			$parts     = explode('.', $item->value);
			$extension = $parts[0];
			$lang->load($extension . '.sys', JPATH_ADMINISTRATOR)
			|| $lang->load($extension, Path::clean(JPATH_ADMINISTRATOR . '/components/' . $extension));
			$options[$i]->text = Text::_(strtoupper($extension) . '_TAGS_' . strtoupper($parts[1]));
		}

// Merge any additional options in the XML definition.
		$options = array_merge(parent::getOptions(), $options);

// Sort by language value
		usort(
			$options,
			function ($a, $b)
			{
				return strcmp($a->text, $b->text);
			}
		);

return $options;
	}
}