<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_fields
 *
 * @copyright   (C) 2019 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Fields\Administrator\Field;

\defined('_JEXEC') or die;

use Joomla\CMS\Access\Access;
use Joomla\CMS\Factory;
use Joomla\CMS\Fields\FieldsServiceInterface;
use Joomla\CMS\Form\Field\ListField;
use Joomla\CMS\Language\Text;
use Joomla\Utilities\ArrayHelper;

/**
 * Components Fieldgroup field.
 *
 * @since  1.6
 */
class ComponentsFieldgroupField extends ListField
{
	/**
	 * The form field type.
	 *
	 * @var     string
	 * @since   3.7.0
	 */
	protected $type = 'ComponentsFieldgroup';

	/**
	 * Method to get a list of options for a list input.
	 *
	 * @return	array  An array of JHtml options.
	 *
	 * @since   3.7.0
	 */
	protected function getOptions()
	{
		// Initialise variable.
		$db = Factory::getDbo();

		$query = $db->getQuery(true)
			->select('DISTINCT a.name AS text, a.element AS value')
			->from('#__extensions as a')
			->where('a.enabled >= 1')
			->where('a.type =' . $db->quote('component'));

		$items = $db->setQuery($query)->loadObjectList();

		$options = [];

		if (count($items))
		{
			$lang = Factory::getLanguage();

			$components = [];

			// Search for components supporting Fieldgroups - suppose that these components support fields as well
			foreach ($items as &$item)
			{
				$availableActions = Access::getActionsFromFile(
					JPATH_ADMINISTRATOR . '/components/' . $item->value . '/access.xml',
					"/access/section[@name='fieldgroup']/"
				);

				if (!empty($availableActions))
				{
					// Load language
					$source = JPATH_ADMINISTRATOR . '/components/' . $item->value;
					$lang->load($item->value . 'sys', JPATH_ADMINISTRATOR)
						|| $lang->load($item->value . 'sys', $source);

					// Translate component name
					$item->text = Text::_($item->text);

					$components[]  = $item;
				}
			}

			if (empty($components))
			{
				return [];
			}

			foreach ($components as $component)
			{
				// Search for different contexts
				$c = Factory::getApplication()->bootComponent($component->value);

				if ($c instanceof FieldsServiceInterface)
				{
					$contexts = $c->getContexts();

					foreach ($contexts as $context)
					{
						$newOption = new \stdClass;
						$newOption->value = strtolower($component->value . '.' . $context);
						$newOption->text = $component->text . ' - ' . Text::_($context);
						$options[] = $newOption;
					}
				}
				else
				{
					$options[] = $component;
				}
			}

			// Sort by name
			$items = ArrayHelper::sortObjects($options, 'text', 1, true, true);
		}

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

		return $options;
	}
}
