<?php

/*
 * This file is part of Contao.
 *
 * (c) Leo Feyer
 *
 * @license LGPL-3.0-or-later
 */

namespace Contao;

use Contao\CoreBundle\Security\ContaoCorePermissions;
use Contao\Model\Collection;
use Symfony\Component\Routing\Exception\ExceptionInterface;

/**
 * Front end module "custom navigation".
 */
class ModuleCustomnav extends Module
{
	/**
	 * Template
	 * @var string
	 */
	protected $strTemplate = 'mod_customnav';

	/**
	 * @var Collection|null
	 */
	protected $objPages;

	/**
	 * Redirect to the selected page
	 *
	 * @return string
	 */
	public function generate()
	{
		$request = System::getContainer()->get('request_stack')->getCurrentRequest();

		if ($request && System::getContainer()->get('contao.routing.scope_matcher')->isBackendRequest($request))
		{
			$objTemplate = new BackendTemplate('be_wildcard');
			$objTemplate->wildcard = '### ' . $GLOBALS['TL_LANG']['FMD']['customnav'][0] . ' ###';
			$objTemplate->title = $this->headline;
			$objTemplate->id = $this->id;
			$objTemplate->link = $this->name;
			$objTemplate->href = StringUtil::specialcharsUrl(System::getContainer()->get('router')->generate('contao_backend', array('do'=>'themes', 'table'=>'tl_module', 'act'=>'edit', 'id'=>$this->id)));

			return $objTemplate->parse();
		}

		// Always return an array (see #4616)
		$this->pages = StringUtil::deserialize($this->pages, true);

		if (empty($this->pages) || !$this->pages[0])
		{
			return '';
		}

		// Get all active pages and also include root pages if the language is added to the URL (see #72)
		$this->objPages = PageModel::findPublishedRegularByIds($this->pages, array('includeRoot'=>true));

		// Return if there are no pages
		if ($this->objPages === null)
		{
			return '';
		}

		$strBuffer = parent::generate();

		return $this->Template->items ? $strBuffer : '';
	}

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

		$items = array();

		$objTemplate = new FrontendTemplate($this->navigationTpl ?: 'nav_default');
		$objTemplate->type = static::class;
		$objTemplate->cssID = $this->cssID; // see #4897 and 6129
		$objTemplate->level = 'level_1';
		$objTemplate->module = $this; // see #155

		$container = System::getContainer();
		$security = $container->get('security.helper');
		$isMember = $security->isGranted('ROLE_MEMBER');
		$urlGenerator = $container->get('contao.routing.content_url_generator');

		foreach ($this->objPages ?? array() as $objModel)
		{
			$objModel->loadDetails();

			// Hide the page if it is only visible to guests
			if ($objModel->guests && $isMember)
			{
				continue;
			}

			// PageModel->groups is an array after calling loadDetails()
			if (!$objModel->protected || $this->showProtected || $security->isGranted(ContaoCorePermissions::MEMBER_IN_GROUPS, $objModel->groups))
			{
				try
				{
					$href = $urlGenerator->generate($objModel);
				}
				catch (ExceptionInterface $exception)
				{
					continue;
				}

				$trail = \in_array($objModel->id, $objPage->trail);

				// Use the path without query string to check for active pages (see #480)
				list($path) = explode('?', Environment::get('requestUri'), 2);

				// Active page
				if ($objPage->id == $objModel->id && $href == $path)
				{
					$strClass = trim($objModel->cssClass);
					$row = $objModel->row();

					$row['isActive'] = true;
					$row['isTrail'] = false;
					$row['class'] = trim('active ' . $strClass);
					$row['title'] = StringUtil::specialchars($objModel->title, true);
					$row['pageTitle'] = StringUtil::specialchars($objModel->pageTitle, true);
					$row['link'] = $objModel->title;
					$row['href'] = $href;
					$row['rel'] = '';
					$row['target'] = '';
					$row['description'] = str_replace(array("\n", "\r"), array(' ', ''), (string) $objModel->description);

					$arrRel = array();

					// Override the link target
					if ($objModel->type == 'redirect' && $objModel->target)
					{
						$arrRel[] = 'noreferrer';
						$arrRel[] = 'noopener';

						$row['target'] = ' target="_blank"';
					}

					// Set the rel attribute
					if (!empty($arrRel))
					{
						$row['rel'] = ' rel="' . implode(' ', $arrRel) . '"';
					}

					$items[] = $row;
				}

				// Regular page
				else
				{
					$strClass = trim($objModel->cssClass . ($trail ? ' trail' : ''));
					$row = $objModel->row();

					$row['isActive'] = false;
					$row['isTrail'] = $trail;
					$row['class'] = $strClass;
					$row['title'] = StringUtil::specialchars($objModel->title, true);
					$row['pageTitle'] = StringUtil::specialchars($objModel->pageTitle, true);
					$row['link'] = $objModel->title;
					$row['href'] = $href;
					$row['rel'] = '';
					$row['target'] = '';
					$row['description'] = str_replace(array("\n", "\r"), array(' ', ''), (string) $objModel->description);

					$arrRel = array();

					// Override the link target
					if ($objModel->type == 'redirect' && $objModel->target)
					{
						$arrRel[] = 'noreferrer';
						$arrRel[] = 'noopener';

						$row['target'] = ' target="_blank"';
					}

					// Set the rel attribute
					if (!empty($arrRel))
					{
						$row['rel'] = ' rel="' . implode(' ', $arrRel) . '"';
					}

					$items[] = $row;
				}
			}
		}

		$objTemplate->items = $items;

		$this->Template->request = Environment::get('requestUri');
		$this->Template->skipId = 'skipNavigation' . $this->id;
		$this->Template->skipNavigation = StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['skipNavigation']);
		$this->Template->items = !empty($items) ? $objTemplate->parse() : '';
	}
}
