PostApplySubscriber.php

<?php

declare (strict_types=1);
namespace Drupal\updated_module;

use Drupal\package_manager\Event\PostApplyEvent;
use Drupal\package_manager\PathLocator;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

/**
 * Writes a file after staged changes are applied to the active directory.
 *
 * This event subscriber doesn't exist in version 1.0.0 of this module, so we
 * use it to test that new event subscribers are picked up after staged changes
 * have been applied.
 */
class PostApplySubscriber implements EventSubscriberInterface {
  
  /**
   * The path locator service.
   *
   * @var \Drupal\package_manager\PathLocator
   */
  private $pathLocator;
  
  /**
   * Constructs a PostApplySubscriber.
   *
   * @param \Drupal\package_manager\PathLocator $path_locator
   *   The path locator service.
   */
  public function __construct(PathLocator $path_locator) {
    $this->pathLocator = $path_locator;
  }
  
  /**
   * Writes a file when staged changes are applied to the active directory.
   */
  public function postApply() : void {
    $dir = $this->pathLocator
      ->getProjectRoot();
    file_put_contents("{$dir}/bravo.txt", 'Bravo!');
  }
  
  /**
   * {@inheritdoc}
   */
  public static function getSubscribedEvents() : array {
    return [
      PostApplyEvent::class => 'postApply',
    ];
  }

}