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<?php
/**
 * @package     Joomla.Site
 * @subpackage  com_content
 *
 * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Content\Site\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\Categories\Categories;
use Joomla\CMS\Categories\CategoryNode;
use Joomla\CMS\Factory;
use Joomla\CMS\MVC\Model\ListModel;
use Joomla\Registry\Registry;

/**
 * This models supports retrieving lists of article categories.
 *
 * @since  1.6
 */
class CategoriesModel extends ListModel
{
	/**
	 * Model context string.
	 *
	 * @var		string
	 */
	public $_context = 'com_content.categories';

/**
	 * The category context (allows other extensions to derived from this model).
	 *
	 * @var		string
	 */
	protected $_extension = 'com_content';

/**
	 * Parent category of the current one
	 *
	 * @var    CategoryNode|null
	 */
	private $_parent = null;

/**
	 * Method to auto-populate the model state.
	 *
	 * Note. Calling getState in this method will result in recursion.
	 *
	 * @param   string  $ordering   The field to order on.
	 * @param   string  $direction  The direction to order on.
	 *
	 * @return  void
	 *
	 * @since   1.6
	 */
	protected function populateState($ordering = null, $direction = null)
	{
		$app = Factory::getApplication();
		$this->setState('filter.extension', $this->_extension);

// Get the parent id if defined.
		$parentId = $app->input->getInt('id');
		$this->setState('filter.parentId', $parentId);

$params = $app->getParams();
		$this->setState('params', $params);

$this->setState('filter.published', 1);
		$this->setState('filter.access', true);
	}

/**
	 * Method to get a store id based on model configuration state.
	 *
	 * This is necessary because the model is used by the component and
	 * different modules that might need different sets of data or different
	 * ordering requirements.
	 *
	 * @param   string  $id  A prefix for the store id.
	 *
	 * @return  string  A store id.
	 */
	protected function getStoreId($id = '')
	{
		// Compile the store id.
		$id	.= ':' . $this->getState('filter.extension');
		$id	.= ':' . $this->getState('filter.published');
		$id	.= ':' . $this->getState('filter.access');
		$id	.= ':' . $this->getState('filter.parentId');

return parent::getStoreId($id);
	}

/**
	 * Redefine the function and add some properties to make the styling easier
	 *
	 * @param   bool  $recursive  True if you want to return children recursively.
	 *
	 * @return  mixed  An array of data items on success, false on failure.
	 *
	 * @since   1.6
	 */
	public function getItems($recursive = false)
	{
		$store = $this->getStoreId();

if (!isset($this->cache[$store]))
		{
			$app = Factory::getApplication();
			$menu = $app->getMenu();
			$active = $menu->getActive();

if ($active)
			{
				$params = $active->getParams();
			}
			else
			{
				$params = new Registry;
			}

$options = array();
			$options['countItems'] = $params->get('show_cat_num_articles_cat', 1) || !$params->get('show_empty_categories_cat', 0);
			$categories = Categories::getInstance('Content', $options);
			$this->_parent = $categories->get($this->getState('filter.parentId', 'root'));

if (is_object($this->_parent))
			{
				$this->cache[$store] = $this->_parent->getChildren($recursive);
			}
			else
			{
				$this->cache[$store] = false;
			}
		}

return $this->cache[$store];
	}

/**
	 * Get the parent.
	 *
	 * @return  object  An array of data items on success, false on failure.
	 *
	 * @since   1.6
	 */
	public function getParent()
	{
		if (!is_object($this->_parent))
		{
			$this->getItems();
		}

return $this->_parent;
	}
}