Contao\Maintenance::run PHP Метод

    public function run()
    {
        /** @var BackendTemplate|object $objTemplate */
        $objTemplate = new \BackendTemplate('be_maintenance_mode');
        $objTemplate->action = ampersand(\Environment::get('request'));
        $objTemplate->headline = $GLOBALS['TL_LANG']['tl_maintenance']['maintenanceMode'];
        $objTemplate->isActive = $this->isActive();
        try {
            $driver = \System::getContainer()->get('lexik_maintenance.driver.factory')->getDriver();
            $isLocked = $driver->isExists();
        } catch (\Exception $e) {
            return '';
        }
        // Toggle the maintenance mode
        if (\Input::post('FORM_SUBMIT') == 'tl_maintenance_mode') {
            if ($isLocked) {
                $driver->unlock();
            } else {
                $driver->lock();
            }
            $this->reload();
        }
        if ($isLocked) {
            $objTemplate->class = 'tl_confirm';
            $objTemplate->explain = $GLOBALS['TL_LANG']['MSC']['maintenanceEnabled'];
            $objTemplate->submit = $GLOBALS['TL_LANG']['tl_maintenance']['maintenanceDisable'];
        } else {
            $objTemplate->class = 'tl_info';
            $objTemplate->explain = $GLOBALS['TL_LANG']['MSC']['maintenanceDisabled'];
            $objTemplate->submit = $GLOBALS['TL_LANG']['tl_maintenance']['maintenanceEnable'];
        }
        return $objTemplate->parse();
    }