<?php

/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2015 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Document\Renderer\Feed;

use Joomla\CMS\Date\Date;
use Joomla\CMS\Document\DocumentRenderer;
use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Router\Route;
use Joomla\CMS\Uri\Uri;

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

/**
 * RssRenderer is a feed that implements RSS 2.0 Specification
 *
 * @link   http://www.rssboard.org/rss-specification
 * @since  3.5
 *
 * @property-read  \Joomla\CMS\Document\FeedDocument  $_doc  Reference to the Document object that instantiated the renderer
 */
class RssRenderer extends DocumentRenderer
{
    /**
     * Renderer mime type
     *
     * @var    string
     * @since  3.5
     */
    protected $_mime = 'application/rss+xml';

    /**
     * Render the feed.
     *
     * @param   string  $name     The name of the element to render
     * @param   array   $params   Array of values
     * @param   string  $content  Override the output of the renderer
     *
     * @return  string  The output of the script
     *
     * @see     DocumentRenderer::render()
     * @since   3.5
     */
    public function render($name = '', $params = null, $content = null)
    {
        $app = Factory::getApplication();
        $tz  = new \DateTimeZone($app->get('offset'));

        $data = $this->_doc;

        // If the last build date from the document isn't a Date object, create one
        if (!($data->lastBuildDate instanceof Date)) {
            // Gets and sets timezone offset from site configuration
            $data->lastBuildDate = Factory::getDate();
            $data->lastBuildDate->setTimezone(new \DateTimeZone($app->get('offset')));
        }

        $url            = Uri::getInstance()->toString(['scheme', 'user', 'pass', 'host', 'port']);
        $syndicationURL = Route::_('&format=feed&type=rss');

        $title = $data->getTitle();

        if ($app->get('sitename_pagetitles', 0) == 1) {
            $title = Text::sprintf('JPAGETITLE', $app->get('sitename'), $data->getTitle());
        } elseif ($app->get('sitename_pagetitles', 0) == 2) {
            $title = Text::sprintf('JPAGETITLE', $data->getTitle(), $app->get('sitename'));
        }

        $feed_title = htmlspecialchars($title, ENT_COMPAT, 'UTF-8');

        $datalink = $data->getLink();

        if (preg_match('/[\x80-\xFF]/', $datalink)) {
            $datalink = implode('/', array_map('rawurlencode', explode('/', $datalink)));
        }

        $feed = "<rss version=\"2.0\" xmlns:atom=\"http://www.w3.org/2005/Atom\">\n";
        $feed .= "	<channel>\n";
        $feed .= "		<title>" . $feed_title . "</title>\n";
        $feed .= "		<description><![CDATA[" . $data->getDescription() . "]]></description>\n";
        $feed .= "		<link>" . str_replace(' ', '%20', $url . $datalink) . "</link>\n";
        $feed .= "		<lastBuildDate>" . htmlspecialchars($data->lastBuildDate->toRFC822(true), ENT_COMPAT, 'UTF-8') . "</lastBuildDate>\n";
        $feed .= "		<generator>" . $data->getGenerator() . "</generator>\n";
        $feed .= "		<atom:link rel=\"self\" type=\"application/rss+xml\" href=\"" . str_replace(' ', '%20', $url . $syndicationURL) . "\"/>\n";

        if ($data->image != null) {
            $feed .= "		<image>\n";
            $feed .= "			<url>" . $data->image->url . "</url>\n";
            $feed .= "			<title>" . htmlspecialchars($data->image->title, ENT_COMPAT, 'UTF-8') . "</title>\n";
            $feed .= "			<link>" . str_replace(' ', '%20', $data->image->link) . "</link>\n";

            if ($data->image->width != '') {
                $feed .= "			<width>" . $data->image->width . "</width>\n";
            }

            if ($data->image->height != '') {
                $feed .= "			<height>" . $data->image->height . "</height>\n";
            }

            if ($data->image->description != '') {
                $feed .= "			<description><![CDATA[" . $data->image->description . "]]></description>\n";
            }

            $feed .= "		</image>\n";
        }

        if ($data->getLanguage() !== '') {
            $feed .= "		<language>" . $data->getLanguage() . "</language>\n";
        }

        if ($data->copyright != '') {
            $feed .= "		<copyright>" . htmlspecialchars($data->copyright, ENT_COMPAT, 'UTF-8') . "</copyright>\n";
        }

        if ($data->editorEmail != '') {
            $feed .= "		<managingEditor>" . htmlspecialchars($data->editorEmail, ENT_COMPAT, 'UTF-8') . ' ('
                . htmlspecialchars($data->editor, ENT_COMPAT, 'UTF-8') . ")</managingEditor>\n";
        }

        if ($data->webmaster != '') {
            $feed .= "		<webMaster>" . htmlspecialchars($data->webmaster, ENT_COMPAT, 'UTF-8') . "</webMaster>\n";
        }

        if ($data->pubDate != '') {
            $pubDate = Factory::getDate($data->pubDate);
            $pubDate->setTimezone($tz);
            $feed .= "		<pubDate>" . htmlspecialchars($pubDate->toRFC822(true), ENT_COMPAT, 'UTF-8') . "</pubDate>\n";
        }

        if (!empty($data->category)) {
            if (\is_array($data->category)) {
                foreach ($data->category as $cat) {
                    $feed .= "		<category>" . htmlspecialchars($cat, ENT_COMPAT, 'UTF-8') . "</category>\n";
                }
            } else {
                $feed .= "		<category>" . htmlspecialchars($data->category, ENT_COMPAT, 'UTF-8') . "</category>\n";
            }
        }

        if ($data->docs != '') {
            $feed .= "		<docs>" . htmlspecialchars($data->docs, ENT_COMPAT, 'UTF-8') . "</docs>\n";
        }

        if ($data->ttl != '') {
            $feed .= "		<ttl>" . htmlspecialchars($data->ttl, ENT_COMPAT, 'UTF-8') . "</ttl>\n";
        }

        if ($data->rating != '') {
            $feed .= "		<rating>" . htmlspecialchars($data->rating, ENT_COMPAT, 'UTF-8') . "</rating>\n";
        }

        if ($data->skipHours != '') {
            $feed .= "		<skipHours>" . htmlspecialchars($data->skipHours, ENT_COMPAT, 'UTF-8') . "</skipHours>\n";
        }

        if ($data->skipDays != '') {
            $feed .= "		<skipDays>" . htmlspecialchars($data->skipDays, ENT_COMPAT, 'UTF-8') . "</skipDays>\n";
        }

        for ($i = 0, $count = \count($data->items); $i < $count; $i++) {
            $itemlink = $data->items[$i]->link;

            if (preg_match('/[\x80-\xFF]/', $itemlink)) {
                $itemlink = implode('/', array_map('rawurlencode', explode('/', $itemlink)));
            }

            if ((strpos($itemlink, 'http://') === false) && (strpos($itemlink, 'https://') === false)) {
                $itemlink = str_replace(' ', '%20', $url . $itemlink);
            }

            $feed .= "		<item>\n";
            $feed .= "			<title>" . htmlspecialchars(strip_tags($data->items[$i]->title), ENT_COMPAT, 'UTF-8') . "</title>\n";
            $feed .= "			<link>" . str_replace(' ', '%20', $itemlink) . "</link>\n";

            if (empty($data->items[$i]->guid)) {
                $feed .= "			<guid isPermaLink=\"true\">" . str_replace(' ', '%20', $itemlink) . "</guid>\n";
            } else {
                $feed .= "			<guid isPermaLink=\"false\">" . htmlspecialchars($data->items[$i]->guid, ENT_COMPAT, 'UTF-8') . "</guid>\n";
            }

            $feed .= "			<description><![CDATA[" . $this->_relToAbs($data->items[$i]->description) . "]]></description>\n";

            if ($data->items[$i]->authorEmail != '') {
                $feed .= '			<author>'
                    . htmlspecialchars($data->items[$i]->authorEmail . ' (' . $data->items[$i]->author . ')', ENT_COMPAT, 'UTF-8') . "</author>\n";
            }

            /*
             * @todo: On hold
             * if ($data->items[$i]->source!='')
             * {
             *   $data.= "          <source>" . htmlspecialchars($data->items[$i]->source, ENT_COMPAT, 'UTF-8') . "</source>\n";
             * }
             */

            if (empty($data->items[$i]->category) === false) {
                if (\is_array($data->items[$i]->category)) {
                    foreach ($data->items[$i]->category as $cat) {
                        $feed .= "			<category>" . htmlspecialchars($cat, ENT_COMPAT, 'UTF-8') . "</category>\n";
                    }
                } else {
                    $feed .= "			<category>" . htmlspecialchars($data->items[$i]->category, ENT_COMPAT, 'UTF-8') . "</category>\n";
                }
            }

            if ($data->items[$i]->comments != '') {
                $feed .= "			<comments>" . htmlspecialchars($data->items[$i]->comments, ENT_COMPAT, 'UTF-8') . "</comments>\n";
            }

            if ($data->items[$i]->date != '') {
                $itemDate = Factory::getDate($data->items[$i]->date);
                $itemDate->setTimezone($tz);
                $feed .= "			<pubDate>" . htmlspecialchars($itemDate->toRFC822(true), ENT_COMPAT, 'UTF-8') . "</pubDate>\n";
            }

            if ($data->items[$i]->enclosure != null) {
                $feed .= "			<enclosure url=\"";
                $feed .= $data->items[$i]->enclosure->url;
                $feed .= "\" length=\"";
                $feed .= $data->items[$i]->enclosure->length;
                $feed .= "\" type=\"";
                $feed .= $data->items[$i]->enclosure->type;
                $feed .= "\"/>\n";
            }

            $feed .= "		</item>\n";
        }

        $feed .= "	</channel>\n";
        $feed .= "</rss>\n";

        return $feed;
    }
}
