src/App/EventSubscriber/MaintenanceModeSubscriber.php line 30

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  1. <?php
  3. declare(strict_types=1);
  5. namespace App\EventSubscriber;
  7. use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  8. use Symfony\Component\HttpFoundation\RedirectResponse;
  9. use Symfony\Component\HttpKernel\Event\RequestEvent;
  10. use Symfony\Component\HttpKernel\KernelEvents;
  12. /**
  13. * Subscriber that redirects to maintenance page when maintenance mode is active.
  14. *
  15. * Checks the STAY_APPLICATION_MAINTENANCE_MODE constant/env variable
  16. * and redirects to /maintenance if enabled.
  17. */
  18. class MaintenanceModeSubscriber implements EventSubscriberInterface
  19. {
  20. private const MAINTENANCE_ROUTE = '/maintenance';
  21. private const ALLOWED_ROUTES = ['/maintenance', '/liveness'];
  23. public static function getSubscribedEvents(): array
  24. {
  25. return [
  26. KernelEvents::REQUEST => ['onKernelRequest', 100], // High priority to run early
  27. ];
  28. }
  30. public function onKernelRequest(RequestEvent $event): void
  31. {
  32. if (!$event->isMainRequest()) {
  33. return;
  34. }
  36. // Check if maintenance mode is enabled
  37. if (!$this->isMaintenanceModeEnabled()) {
  38. return;
  39. }
  41. $request = $event->getRequest();
  42. $path = $request->getPathInfo();
  44. // Allow certain routes even in maintenance mode
  45. foreach (self::ALLOWED_ROUTES as $allowedRoute) {
  46. if (str_starts_with($path, $allowedRoute)) {
  47. return;
  48. }
  49. }
  51. // Redirect to maintenance page
  52. $event->setResponse(new RedirectResponse(self::MAINTENANCE_ROUTE));
  53. }
  55. private function isMaintenanceModeEnabled(): bool
  56. {
  57. // Check constant first (defined in www/index.php)
  58. if (defined('STAY_APPLICATION_MAINTENANCE_MODE')) {
  59. $value = constant('STAY_APPLICATION_MAINTENANCE_MODE');
  60. return $value === 'true' || $value === true || $value === '1';
  61. }
  63. // Fallback to env variable
  64. $envValue = getenv('STAY_APPLICATION_MAINTENANCE_MODE');
  65. return $envValue === 'true' || $envValue === '1';
  66. }
  67. }