private function handle_form()
{
$config = SitemapConfig::load();
if ($this->form->get_value('enable_sitemap_xml')) {
$config->enable_sitemap_xml_generation();
$config->set_sitemap_xml_life_time((int) $this->form->get_value('file_life_time'));
} else {
$config->disable_sitemap_xml_generation();
}
SitemapConfig::save($config);
}
private static function update_last_generation_date()
{
$sitemap_config = SitemapConfig::load();
$sitemap_config->set_last_generation_date(new Date());
SitemapConfig::save($sitemap_config);
}