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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2005 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Pathway;

\defined('JPATH_PLATFORM') or die;

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

/**
 * Class to maintain a pathway.
 *
 * The user's navigated path within the application.
 *
 * @since  1.5
 */
class Pathway
{
	/**
	 * Array to hold the pathway item objects
	 *
	 * @var    array
	 * @since  4.0.0
	 */
	protected $pathway = array();

/**
	 * Integer number of items in the pathway
	 *
	 * @var    integer
	 * @since  4.0.0
	 */
	protected $count = 0;

/**
	 * Pathway instances container.
	 *
	 * @var    Pathway[]
	 * @since  1.7
	 */
	protected static $instances = array();

/**
	 * Returns a Pathway object
	 *
	 * @param   string  $client  The name of the client
	 *
	 * @return  Pathway  A Pathway object.
	 *
	 * @since       1.5
	 * @throws      \RuntimeException
	 * @deprecated  5.0 Get the instance from the application, eg. $application->getPathway()
	 */
	public static function getInstance($client)
	{
		if (empty(self::$instances[$client]))
		{
			// Create a Pathway object
			$name = ucfirst($client) . 'Pathway';

if (!Factory::getContainer()->has($name))
			{
				throw new \RuntimeException(Text::sprintf('JLIB_APPLICATION_ERROR_PATHWAY_LOAD', $client), 500);
			}

self::$instances[$client] = Factory::getContainer()->get($name);
		}

return self::$instances[$client];
	}

/**
	 * Return the Pathway items array
	 *
	 * @return  array  Array of pathway items
	 *
	 * @since   1.5
	 */
	public function getPathway()
	{
		// Use array_values to reset the array keys numerically
		return array_values($this->pathway);
	}

/**
	 * Set the Pathway items array.
	 *
	 * @param   array  $pathway  An array of pathway objects.
	 *
	 * @return  array  The previous pathway data.
	 *
	 * @since   1.5
	 */
	public function setPathway($pathway)
	{
		$oldPathway = $this->pathway;

// Set the new pathway.
		$this->pathway = array_values((array) $pathway);

return array_values($oldPathway);
	}

/**
	 * Create and return an array of the pathway names.
	 *
	 * @return  array  Array of names of pathway items
	 *
	 * @since   1.5
	 */
	public function getPathwayNames()
	{
		$names = array();

// Build the names array using just the names of each pathway item
		foreach ($this->pathway as $item)
		{
			$names[] = $item->name;
		}

// Use array_values to reset the array keys numerically
		return array_values($names);
	}

/**
	 * Create and add an item to the pathway.
	 *
	 * @param   string  $name  The name of the item.
	 * @param   string  $link  The link to the item.
	 *
	 * @return  boolean  True on success
	 *
	 * @since   1.5
	 */
	public function addItem($name, $link = '')
	{
		$ret = false;

if ($this->pathway[] = $this->makeItem($name, $link))
		{
			$ret = true;
			$this->count++;
		}

return $ret;
	}

/**
	 * Set item name.
	 *
	 * @param   integer  $id    The id of the item on which to set the name.
	 * @param   string   $name  The name to set.
	 *
	 * @return  boolean  True on success
	 *
	 * @since   1.5
	 */
	public function setItemName($id, $name)
	{
		$ret = false;

if (isset($this->pathway[$id]))
		{
			$this->pathway[$id]->name = $name;
			$ret = true;
		}

return $ret;
	}

/**
	 * Create and return a new pathway object.
	 *
	 * @param   string  $name  Name of the item
	 * @param   string  $link  Link to the item
	 *
	 * @return  \stdClass  Pathway item object
	 *
	 * @since   3.1
	 */
	protected function makeItem($name, $link)
	{
		$item = new \stdClass;
		$item->name = html_entity_decode($name, ENT_COMPAT, 'UTF-8');
		$item->link = $link;

return $item;
	}
}