Method render

/**
 * 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();
    // Gets and sets timezone offset from site configuration
    $tz = new \DateTimeZone($app->get('offset'));
    $now = Factory::getDate();
    $now->setTimezone($tz);
    $data = $this->_doc;
    $url = Uri::getInstance()->toString(array('scheme', 'user', 'pass', 'host', 'port'));
    $syndicationURL = Route::_('&format=feed&type=atom');
    $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');
    $feed = "<feed xmlns=\"http://www.w3.org/2005/Atom\"";
    if ($data->getLanguage() != '') {
        $feed .= " xml:lang=\"" . $data->getLanguage() . "\"";
    }
    $feed .= ">\n";
    $feed .= "\t<title type=\"text\">" . $feed_title . "</title>\n";
    $feed .= "\t<subtitle type=\"text\">" . htmlspecialchars($data->getDescription(), ENT_COMPAT, 'UTF-8') . "</subtitle>\n";
    if (!empty($data->category)) {
        if (\is_array($data->category)) {
            foreach ($data->category as $cat) {
                $feed .= "\t<category term=\"" . htmlspecialchars($cat, ENT_COMPAT, 'UTF-8') . "\" />\n";
            }
        } else {
            $feed .= "\t<category term=\"" . htmlspecialchars($data->category, ENT_COMPAT, 'UTF-8') . "\" />\n";
        }
    }
    $feed .= "\t<link rel=\"alternate\" type=\"text/html\" href=\"" . $url . "\"/>\n";
    $feed .= "\t<id>" . str_replace(' ', '%20', $data->getBase()) . "</id>\n";
    $feed .= "\t<updated>" . htmlspecialchars($now->toISO8601(true), ENT_COMPAT, 'UTF-8') . "</updated>\n";
    if ($data->editor != '') {
        $feed .= "\t<author>\n";
        $feed .= "\t\t<name>" . $data->editor . "</name>\n";
        if ($data->editorEmail != '') {
            $feed .= "\t\t<email>" . htmlspecialchars($data->editorEmail, ENT_COMPAT, 'UTF-8') . "</email>\n";
        }
        $feed .= "\t</author>\n";
    }
    $versionHtmlEscaped = '';
    if ($app->get('MetaVersion', 0)) {
        $minorVersion = Version::MAJOR_VERSION . '.' . Version::MINOR_VERSION;
        $versionHtmlEscaped = ' version="' . htmlspecialchars($minorVersion, ENT_COMPAT, 'UTF-8') . '"';
    }
    $feed .= "\t<generator uri=\"https://www.joomla.org\"" . $versionHtmlEscaped . ">" . $data->getGenerator() . "</generator>\n";
    $feed .= "\t<link rel=\"self\" type=\"application/atom+xml\" href=\"" . str_replace(' ', '%20', $url . $syndicationURL) . "\"/>\n";
    for ($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)));
        }
        $feed .= "\t<entry>\n";
        $feed .= "\t\t<title>" . htmlspecialchars(strip_tags($data->items[$i]->title), ENT_COMPAT, 'UTF-8') . "</title>\n";
        $feed .= "\t\t<link rel=\"alternate\" type=\"text/html\" href=\"" . $url . $itemlink . "\"/>\n";
        if ($data->items[$i]->date == '') {
            $data->items[$i]->date = $now->toUnix();
        }
        $itemDate = Factory::getDate($data->items[$i]->date);
        $itemDate->setTimezone($tz);
        $feed .= "\t\t<published>" . htmlspecialchars($itemDate->toISO8601(true), ENT_COMPAT, 'UTF-8') . "</published>\n";
        $feed .= "\t\t<updated>" . htmlspecialchars($itemDate->toISO8601(true), ENT_COMPAT, 'UTF-8') . "</updated>\n";
        if (empty($data->items[$i]->guid)) {
            $itemGuid = str_replace(' ', '%20', $url . $itemlink);
        } else {
            $itemGuid = htmlspecialchars($data->items[$i]->guid, ENT_COMPAT, 'UTF-8');
        }
        $feed .= "\t\t<id>" . $itemGuid . "</id>\n";
        if ($data->items[$i]->author != '') {
            $feed .= "\t\t<author>\n";
            $feed .= "\t\t\t<name>" . htmlspecialchars($data->items[$i]->author, ENT_COMPAT, 'UTF-8') . "</name>\n";
            if (!empty($data->items[$i]->authorEmail)) {
                $feed .= "\t\t\t<email>" . htmlspecialchars($data->items[$i]->authorEmail, ENT_COMPAT, 'UTF-8') . "</email>\n";
            }
            $feed .= "\t\t</author>\n";
        }
        if (!empty($data->items[$i]->description)) {
            $feed .= "\t\t<summary type=\"html\">" . htmlspecialchars($this->_relToAbs($data->items[$i]->description), ENT_COMPAT, 'UTF-8') . "</summary>\n";
            $feed .= "\t\t<content type=\"html\">" . htmlspecialchars($this->_relToAbs($data->items[$i]->description), ENT_COMPAT, 'UTF-8') . "</content>\n";
        }
        if (!empty($data->items[$i]->category)) {
            if (\is_array($data->items[$i]->category)) {
                foreach ($data->items[$i]->category as $cat) {
                    $feed .= "\t\t<category term=\"" . htmlspecialchars($cat, ENT_COMPAT, 'UTF-8') . "\" />\n";
                }
            } else {
                $feed .= "\t\t<category term=\"" . htmlspecialchars($data->items[$i]->category, ENT_COMPAT, 'UTF-8') . "\" />\n";
            }
        }
        if ($data->items[$i]->enclosure != null) {
            $feed .= "\t\t<link rel=\"enclosure\" href=\"" . $data->items[$i]->enclosure->url . "\" type=\"" . $data->items[$i]->enclosure->type . "\"  length=\"" . $data->items[$i]->enclosure->length . "\"/>\n";
        }
        $feed .= "\t</entry>\n";
    }
    $feed .= "</feed>\n";
    return $feed;
}