<?php
/**
 * @package     Joomla.Libraries
 * @subpackage  HTML
 *
 * @copyright   Copyright (C) 2005 - 2020 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('JPATH_PLATFORM') or die;

/**
 * Utility class to render a list view sidebar
 *
 * @since  3.0
 */
abstract class JHtmlSidebar
{
	/**
	 * Menu entries
	 *
	 * @var    array
	 * @since  3.0
	 */
	protected static $entries = array();

	/**
	 * Filters
	 *
	 * @var    array
	 * @since  3.0
	 */
	protected static $filters = array();

	/**
	 * Value for the action attribute of the form.
	 *
	 * @var    string
	 * @since  3.0
	 */
	protected static $action = '';

	/**
	 * Render the sidebar.
	 *
	 * @return  string  The necessary HTML to display the sidebar
	 *
	 * @since   3.0
	 */
	public static function render()
	{
		// Collect display data
		$data                 = new stdClass;
		$data->list           = static::getEntries();
		$data->filters        = static::getFilters();
		$data->action         = static::getAction();
		$data->displayMenu    = count($data->list);
		$data->displayFilters = count($data->filters);
		$data->hide           = JFactory::getApplication()->input->getBool('hidemainmenu');

		// Create a layout object and ask it to render the sidebar
		$layout      = new JLayoutFile('joomla.sidebars.submenu');

		return $layout->render($data);
	}

	/**
	 * Method to add a menu item to submenu.
	 *
	 * @param   string  $name    Name of the menu item.
	 * @param   string  $link    URL of the menu item.
	 * @param   bool    $active  True if the item is active, false otherwise.
	 *
	 * @return  void
	 *
	 * @since   3.0
	 */
	public static function addEntry($name, $link = '', $active = false)
	{
		static::$entries[] = array($name, $link, $active);
	}

	/**
	 * Returns an array of all submenu entries
	 *
	 * @return  array
	 *
	 * @since   3.0
	 */
	public static function getEntries()
	{
		return static::$entries;
	}

	/**
	 * Method to add a filter to the submenu
	 *
	 * @param   string  $label      Label for the menu item.
	 * @param   string  $name       Name for the filter. Also used as id.
	 * @param   string  $options    Options for the select field.
	 * @param   bool    $noDefault  Don't show the label as the empty option
	 *
	 * @return  void
	 *
	 * @since   3.0
	 */
	public static function addFilter($label, $name, $options, $noDefault = false)
	{
		static::$filters[] = array('label' => $label, 'name' => $name, 'options' => $options, 'noDefault' => $noDefault);
	}

	/**
	 * Returns an array of all filters
	 *
	 * @return  array
	 *
	 * @since   3.0
	 */
	public static function getFilters()
	{
		return static::$filters;
	}

	/**
	 * Set value for the action attribute of the filter form
	 *
	 * @param   string  $action  Value for the action attribute of the form
	 *
	 * @return  void
	 *
	 * @since   3.0
	 */
	public static function setAction($action)
	{
		static::$action = $action;
	}

	/**
	 * Get value for the action attribute of the filter form
	 *
	 * @return  string
	 *
	 * @since   3.0
	 */
	public static function getAction()
	{
		return static::$action;
	}
}