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<?php
/**
 * Kunena Component
 *
 * @package       Kunena.Site
 * @subpackage    Controllers
 *
 * @copyright (C) 2008 - 2016 Kunena Team. All rights reserved.
 * @license       http://www.gnu.org/copyleft/gpl.html GNU/GPL
 * @link          https://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;
	}
}