<?php if (!defined('TL_ROOT')) die('You cannot access this file directly!');

/**
 * Contao Open Source CMS
 * Copyright (C) 2005-2013 Leo Feyer
 *
 * Formerly known as TYPOlight Open Source CMS.
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program. If not, please visit the Free
 * Software Foundation website at <http://www.gnu.org/licenses/>.
 *
 * PHP version 5
 * @copyright  Leo Feyer 2005-2013
 * @author     Leo Feyer <https://contao.org>
 * @package    Frontend
 * @license    LGPL
 * @filesource
 */


/**
 * Class ModuleNavigation
 *
 * Front end module "navigation".
 * @copyright  Leo Feyer 2005-2013
 * @author     Leo Feyer <https://contao.org>
 * @package    Controller
 */
class ModuleNavigation extends Module
{

	/**
	 * Template
	 * @var string
	 */
	protected $strTemplate = 'mod_navigation';


	/**
	 * Do not display the module if there are no menu items
	 * @return string
	 */
	public function generate()
	{
		if (TL_MODE == 'BE')
		{
			$objTemplate = new BackendTemplate('be_wildcard');

			$objTemplate->wildcard = '### NAVIGATION MENU ###';
			$objTemplate->title = $this->headline;
			$objTemplate->id = $this->id;
			$objTemplate->link = $this->name;
			$objTemplate->href = 'contao/main.php?do=themes&amp;table=tl_module&amp;act=edit&amp;id=' . $this->id;

			return $objTemplate->parse();
		}

		$strBuffer = parent::generate();
		return strlen($this->Template->items) ? $strBuffer : '';
	}


	/**
	 * Generate the module
	 */
	protected function compile()
	{
		global $objPage;

		$trail = $objPage->trail;
		$level = ($this->levelOffset > 0) ? $this->levelOffset : 0;

		// Overwrite with custom reference page
		if ($this->defineRoot && $this->rootPage > 0)
		{
			$trail = array($this->rootPage);
			$level = 0;
		}

		$this->Template->request = $this->getIndexFreeRequest(true);
		$this->Template->skipId = 'skipNavigation' . $this->id;
		$this->Template->skipNavigation = specialchars($GLOBALS['TL_LANG']['MSC']['skipNavigation']);
		$this->Template->items = $this->renderNavigation($trail[$level]);
	}
}

?>