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',
        ];
    }

}