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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2018 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\Factory;
use Joomla\CMS\HTML\HTMLHelper;
use Joomla\CMS\Language\Text;

/**
 * Utility class working with workflow states select lists
 *
 * @since  4.0.0
 */
abstract class WorkflowStage
{

	/**
	 * Get a list of the available workflow stages.
	 *
	 * @param   array  $options  An array of options for the control
	 *
	 * @return  array
	 *
	 * @since   4.0.0
	 */
	public static function existing($options)
	{
		// Get the database object and a new query object.
		$db    = Factory::getDbo();
		$query = $db->getQuery(true);

		// Build the query.
		$query->select(
			[
				$db->quoteName('ws.id', 'workflow_stage_id'),
				$db->quoteName('ws.title', 'workflow_stage_title'),
				$db->quoteName('w.id', 'workflow_id'),
				$db->quoteName('w.title', 'workflow_title'),
			]
		)
			->from($db->quoteName('#__workflow_stages', 'ws'))
			->join('LEFT', $db->quoteName('#__workflows', 'w'), $db->quoteName('w.id') . ' = ' . $db->quoteName('ws.workflow_id'))
			->where($db->quoteName('w.published') . ' = 1')
			->order($db->quoteName('ws.ordering'));

		// Set the query and load the options.
		$stages = $db->setQuery($query)->loadObjectList();

		$workflowStages = array();

		// Grouping the stages by workflow
		foreach ($stages as $stage)
		{
			// Using workflow ID to differentiate workflows having same title
			$workflowStageKey = Text::_($stage->workflow_title) . ' (' . $stage->workflow_id . ')';

			if (!array_key_exists($workflowStageKey, $workflowStages))
			{
				$workflowStages[$workflowStageKey] = array();
			}

			$workflowStages[$workflowStageKey][] = HTMLHelper::_('select.option', $stage->workflow_stage_id, Text::_($stage->workflow_stage_title));
		}

		$prefix[] = array(
			HTMLHelper::_('select.option', '', $options['title'])
		);

		return array_merge($prefix, $workflowStages);
	}
}