config_preview_deploy-1.0.0-alpha3/src/EventSubscriber/ConfigTimestampSubscriber.php

<?php

declare(strict_types=1);

namespace Drupal\config_preview_deploy\EventSubscriber;

use Drupal\Core\Config\ConfigCrudEvent;
use Drupal\Core\Config\ConfigEvents;
use Drupal\Core\State\StateInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

/**
 * Tracks configuration changes by updating timestamps.
 */
class ConfigTimestampSubscriber implements EventSubscriberInterface {

  /**
   * The state service.
   */
  protected StateInterface $state;

  /**
   * Constructs a ConfigTimestampSubscriber object.
   */
  public function __construct(StateInterface $state) {
    $this->state = $state;
  }

  /**
   * Responds to configuration save events.
   */
  public function onConfigSave(ConfigCrudEvent $event): void {
    $this->updateLastChangeTimestamp();
  }

  /**
   * Responds to configuration delete events.
   */
  public function onConfigDelete(ConfigCrudEvent $event): void {
    $this->updateLastChangeTimestamp();
  }

  /**
   * Updates the last change timestamp.
   */
  protected function updateLastChangeTimestamp(): void {
    $this->state->set('config_preview_deploy.last_change', time());
  }

  /**
   * {@inheritdoc}
   */
  public static function getSubscribedEvents(): array {
    return [
      ConfigEvents::SAVE => ['onConfigSave'],
      ConfigEvents::DELETE => ['onConfigDelete'],
    ];
  }

}