UserRequestSubscriber.php

<?php

namespace Drupal\user\EventSubscriber;

use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\Site\Settings;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\TerminateEvent;
use Symfony\Component\HttpKernel\KernelEvents;

/**
 * Updates the current user's last access time.
 */
class UserRequestSubscriber implements EventSubscriberInterface {
    
    /**
     * The current account.
     *
     * @var \Drupal\Core\Session\AccountInterface
     */
    protected $account;
    
    /**
     * The entity type manager service.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * Constructs a new UserRequestSubscriber.
     *
     * @param \Drupal\Core\Session\AccountInterface $account
     *   The current user.
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager service.
     */
    public function __construct(AccountInterface $account, EntityTypeManagerInterface $entity_type_manager) {
        $this->account = $account;
        $this->entityTypeManager = $entity_type_manager;
    }
    
    /**
     * Updates the current user's last access time.
     *
     * @param \Symfony\Component\HttpKernel\Event\TerminateEvent $event
     *   The event to process.
     */
    public function onKernelTerminate(TerminateEvent $event) {
        if ($this->account
            ->isAuthenticated() && REQUEST_TIME - $this->account
            ->getLastAccessedTime() > Settings::get('session_write_interval', 180)) {
            // Do that no more than once per 180 seconds.
            
            /** @var \Drupal\user\UserStorageInterface $storage */
            $storage = $this->entityTypeManager
                ->getStorage('user');
            $storage->updateLastAccessTimestamp($this->account, REQUEST_TIME);
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public static function getSubscribedEvents() {
        // Should go before other subscribers start to write their caches. Notably
        // before \Drupal\Core\EventSubscriber\KernelDestructionSubscriber to
        // prevent instantiation of destructed services.
        $events[KernelEvents::TERMINATE][] = [
            'onKernelTerminate',
            300,
        ];
        return $events;
    }

}