<?php

/**
 * @package     Joomla.Site
 * @subpackage  com_tags
 *
 * @copyright   (C) 2013 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Tags\Site\View\Tags;

use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\View\GenericDataException;
use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;
use Joomla\CMS\Router\Route;
use Joomla\Registry\Registry;

// phpcs:disable PSR1.Files.SideEffects
\defined('_JEXEC') or die;
// phpcs:enable PSR1.Files.SideEffects

/**
 * HTML View class for the Tags component
 *
 * @since  3.1
 */
class HtmlView extends BaseHtmlView
{
    /**
     * The model state
     *
     * @var    \Joomla\CMS\Object\CMSObject
     *
     * @since  3.1
     */
    protected $state;

    /**
     * The list of tags
     *
     * @var    array|false
     * @since  3.1
     */
    protected $items;

    /**
     * The pagination object
     *
     * @var    \Joomla\CMS\Pagination\Pagination
     * @since  3.1
     */
    protected $pagination;

    /**
     * The page parameters
     *
     * @var    \Joomla\Registry\Registry|null
     * @since  3.1
     */
    protected $params = null;

    /**
     * The page class suffix
     *
     * @var    string
     * @since  4.0.0
     */
    protected $pageclass_sfx = '';

    /**
     * The logged in user
     *
     * @var    \Joomla\CMS\User\User|null
     * @since  4.0.0
     */
    protected $user = null;

    /**
     * Execute and display a template script.
     *
     * @param   string  $tpl  The name of the template file to parse; automatically searches through the template paths.
     *
     * @return  mixed   A string if successful, otherwise an Error object.
     */
    public function display($tpl = null)
    {
        // Get some data from the models
        $this->state      = $this->get('State');
        $this->items      = $this->get('Items');
        $this->pagination = $this->get('Pagination');
        $this->params     = $this->state->get('params');
        $this->user       = $this->getCurrentUser();

        if (count($errors = $this->get('Errors'))) {
            throw new GenericDataException(implode("\n", $errors), 500);
        }

        // Flag indicates to not add limitstart=0 to URL
        $this->pagination->hideEmptyLimitstart = true;

        if (!empty($this->items)) {
            foreach ($this->items as $itemElement) {
                // Prepare the data.
                $temp                = new Registry($itemElement->params);
                $itemElement->params = clone $this->params;
                $itemElement->params->merge($temp);
                $itemElement->params = (array) json_decode($itemElement->params);
            }
        }

        // Escape strings for HTML output
        $this->pageclass_sfx = htmlspecialchars($this->params->get('pageclass_sfx', ''));

        $active = Factory::getApplication()->getMenu()->getActive();

        // Load layout from active query (in case it is an alternative menu item)
        if ($active && isset($active->query['option']) && $active->query['option'] === 'com_tags' && $active->query['view'] === 'tags') {
            if (isset($active->query['layout'])) {
                $this->setLayout($active->query['layout']);
            }
        } else {
            // Load default All Tags layout from component
            if ($layout = $this->params->get('tags_layout')) {
                $this->setLayout($layout);
            }
        }

        $this->_prepareDocument();

        parent::display($tpl);
    }

    /**
     * Prepares the document
     *
     * @return void
     */
    protected function _prepareDocument()
    {
        // Because the application sets a default page title,
        // we need to get it from the menu item itself
        $menu = Factory::getApplication()->getMenu()->getActive();

        if ($menu) {
            $this->params->def('page_heading', $this->params->get('page_title', $menu->title));
        } else {
            $this->params->def('page_heading', Text::_('COM_TAGS_DEFAULT_PAGE_TITLE'));
        }

        // Set metadata for all tags menu item
        if ($this->params->get('menu-meta_description')) {
            $this->document->setDescription($this->params->get('menu-meta_description'));
        }

        if ($this->params->get('robots')) {
            $this->document->setMetaData('robots', $this->params->get('robots'));
        }

        // Respect configuration Sitename Before/After for TITLE in views All Tags.
        $this->setDocumentTitle($this->document->getTitle());

        // Add alternative feed link
        if ($this->params->get('show_feed_link', 1) == 1) {
            $link    = '&format=feed&limitstart=';
            $attribs = ['type' => 'application/rss+xml', 'title' => htmlspecialchars($this->document->getTitle())];
            $this->document->addHeadLink(Route::_($link . '&type=rss'), 'alternate', 'rel', $attribs);
            $attribs = ['type' => 'application/atom+xml', 'title' => htmlspecialchars($this->document->getTitle())];
            $this->document->addHeadLink(Route::_($link . '&type=atom'), 'alternate', 'rel', $attribs);
        }
    }
}
