src/EventSubscriber/Maintenance/MaintenanceSubscriber.php line 26

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  1. <?php
  3. namespace App\EventSubscriber\Maintenance;
  5. use Symfony\Component\HttpKernel\Event\RequestEvent;
  6. use Psr\Log\LoggerInterface;
  7. use Symfony\Component\HttpFoundation\Response;
  8. use Twig\Environment;
  10. class MaintenanceSubscriber
  11. {
  13. private $logger;
  15. private $twig;
  17. private $underMaintenance;
  19. public function __construct(LoggerInterface $logger, Environment $twig, $underMaintenance)
  20. {
  21. $this->logger = $logger;
  22. $this->twig = $twig;
  23. $this->underMaintenance = $underMaintenance;
  24. }
  26. public function onKernelRequest(RequestEvent $event)
  27. {
  28. // Check for UNDER_MAINTENANCE env var, if it is empty or false, then we can exit
  29. if (!$this->underMaintenance || $this->strEquals($this->underMaintenance, 'false')) {
  30. return;
  31. }
  33. // Check for if UNDER_MAINTENANCE is not set to true
  34. if (!$this->strEquals($this->underMaintenance, 'true')) {
  36. // Exit if we have an invalidate date
  37. if (!$this->validateDate($this->underMaintenance)) {
  38. return;
  39. }
  41. $underMaintenanceEndDate = strtotime($this->underMaintenance);
  42. $now = new \DateTime();
  44. // Exit if maintenance end date has passed
  45. if ($now > $underMaintenanceEndDate) {
  46. return;
  47. }
  48. }
  50. // Final sanity check for if UNDER_MAINTENACE is true or a valid date
  51. if ($this->strEquals($this->underMaintenance, 'true') || $this->validateDate(($this->underMaintenance))) {
  52. // render page
  53. $event->setResponse(new Response(
  54. $this->twig->render('views/maintenance.html.twig'),
  55. Response::HTTP_SERVICE_UNAVAILABLE,
  56. ));
  57. $event->stopPropagation();
  58. }
  60. // Do nothing
  61. }
  63. private function strEquals($string, $value)
  64. {
  65. return strtoupper($string) === strtoupper($value);
  66. }
  68. private function validateDate($date, $format = 'Y-m-d H:i:s')
  69. {
  70. $d = \DateTime::createFromFormat($format, $date);
  71. return $d && $d->format($format) == $date;
  72. }
  73. }