<?php
/**
 * Kunena Component
 * @package Kunena.Site
 * @subpackage Controllers
 *
 * @copyright (C) 2008 - 2013 Kunena Team. All rights reserved.
 * @license http://www.gnu.org/copyleft/gpl.html GNU/GPL
 * @link http://www.kunena.org
 **/
defined ( '_JEXEC' ) or die ();

/**
 * Kunena Home Controller
 *
 * @since		2.0
 */
class KunenaControllerHome extends KunenaController {
	public $home = 1;

	public function display($cachable = false, $urlparams = false) {
		$menu = $this->app->getMenu ();
		$home = $menu->getActive ();
		if (!$home) {
			JRequest::setVar ( 'view', 'category' );
			JRequest::setVar ( 'layout', 'list' );
			//JError::raiseError ( 500, JText::_ ( 'COM_KUNENA_NO_ACCESS' ) );

		} else {
			// Find default menu item
			$default = $this->_getDefaultMenuItem($menu, $home);
			if (!$default || $default->id == $home->id) {
				// There is no default menu item, use category view instead

				$default = $menu->getItem ( KunenaRoute::getItemID("index.php?option=com_kunena&view=category&layout=list") );
				if ($default) {
					$default = clone $default;
					$defhome = KunenaRoute::getHome($default);
					if (!$defhome || $defhome->id != $home->id) $default = clone $home;
					$default->query['view'] = 'category';
					$default->query['layout'] = 'list';
				}
			}
			if (!$default) {
				JError::raiseError ( 500, JText::_ ( 'COM_KUNENA_NO_ACCESS' ) );
			}

			// Add query variables from shown menu item
			foreach ( $default->query as $var => $value ) {
				JRequest::setVar ( $var, $value );
			}

			// Remove query variables coming from the home menu item
			JRequest::setVar ( 'defaultmenu', null );

			// Set active menu item to point the real page
			$menu->setActive ( $default->id );
		}

		// Reset our router
		KunenaRoute::initialize();

		// Run display task from our new controller
		$controller = KunenaController::getInstance();
		$controller->execute ('display');

		// Set redirect and message
		$this->setRedirect ($controller->getRedirect(), $controller->getMessage(), $controller->getMessageType());
	}

	protected function _getDefaultMenuItem($menu, $active, $visited=array()) {

		if (empty ( $active->query ['defaultmenu'] ) || $active->id == $active->query ['defaultmenu']) {
			// There is no highlighted menu item
			return null;
		}

		$item = $menu->getItem ( $active->query ['defaultmenu'] );
		if (! $item) {
			// Menu item points to nowhere, abort
			KunenaError::warning ( JText::sprintf ( 'COM_KUNENA_WARNING_MENU_NOT_EXISTS' ), 'menu' );
			return null;

		} elseif (isset($visited[$item->id])) {
			// Menu loop detected, abort
			KunenaError::warning ( JText::sprintf ( 'COM_KUNENA_WARNING_MENU_LOOP' ), 'menu' );
			return null;

		} elseif (empty ( $item->component ) || $item->component != 'com_kunena' || !isset($item->query ['view'])) {
			// Menu item doesn't point to Kunena, abort
			KunenaError::warning ( JText::sprintf ( 'COM_KUNENA_WARNING_MENU_NOT_KUNENA' ), 'menu' );
			return null;

		} elseif ( $item->query ['view'] == 'home' ) {
			// Menu item is pointing to another Home Page, try to find default menu item from there
			$visited[$item->id] = 1;
			$item = $this->_getDefaultMenuItem($menu, $item->query ['defaultmenu'], $visited);

		}
		return $item;
	}
}
