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Filename : CategoryServiceTrait.php
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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
 */

namespace Joomla\CMS\Categories;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Form\Form;
use Joomla\CMS\Helper\ContentHelper;

/**
 * Trait for component categories service.
 *
 * @since  4.0.0
 */
trait CategoryServiceTrait
{
	/**
	 * The categories factory
	 *
	 * @var  CategoryFactoryInterface
	 *
	 * @since  4.0.0
	 */
	private $categoryFactory;

	/**
	 * Returns the category service.
	 *
	 * @param   array   $options  The options
	 * @param   string  $section  The section
	 *
	 * @return  CategoryInterface
	 *
	 * @since   4.0.0
	 * @throws  SectionNotFoundException
	 */
	public function getCategory(array $options = [], $section = ''): CategoryInterface
	{
		return $this->categoryFactory->createCategory($options, $section);
	}

	/**
	 * Sets the internal category factory.
	 *
	 * @param   CategoryFactoryInterface  $categoryFactory  The categories factory
	 *
	 * @return  void
	 *
	 * @since  4.0.0
	 */
	public function setCategoryFactory(CategoryFactoryInterface $categoryFactory)
	{
		$this->categoryFactory = $categoryFactory;
	}

	/**
	 * Adds Count Items for Category Manager.
	 *
	 * @param   \stdClass[]  $items    The category objects
	 * @param   string       $section  The section
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 * @throws  \Exception
	 */
	public function countItems(array $items, string $section)
	{
		$config = (object) array(
			'related_tbl'   => $this->getTableNameForSection($section),
			'state_col'     => $this->getStateColumnForSection($section),
			'group_col'     => 'catid',
			'relation_type' => 'category_or_group',
		);

		ContentHelper::countRelations($items, $config);
	}

	/**
	 * Prepares the category form
	 *
	 * @param   Form          $form  The form to change
	 * @param   array|object  $data  The form data
	 *
	 * @return void
	 */
	public function prepareForm(Form $form, $data)
	{
	}

	/**
	 * Returns the table for the count items functions for the given section.
	 *
	 * @param   string  $section  The section
	 *
	 * @return  string|null
	 *
	 * @since   4.0.0
	 */
	protected function getTableNameForSection(string $section = null)
	{
		return null;
	}

	/**
	 * Returns the state column for the count items functions for the given section.
	 *
	 * @param   string  $section  The section
	 *
	 * @return  string|null
	 *
	 * @since   4.0.0
	 */
	protected function getStateColumnForSection(string $section = null)
	{
		return 'state';
	}
}