MenuLinkAdd.php

<?php

namespace Drupal\menu_ui\Plugin\Menu\LocalAction;

use Drupal\Core\Menu\LocalActionDefault;
use Drupal\Core\Routing\RedirectDestinationInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Routing\RouteProviderInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Modifies the 'Add link' local action to add a destination.
 */
class MenuLinkAdd extends LocalActionDefault {
    
    /**
     * The redirect destination.
     *
     * @var \Drupal\Core\Routing\RedirectDestinationInterface
     */
    private $redirectDestination;
    
    /**
     * Constructs a MenuLinkAdd object.
     *
     * @param array $configuration
     *   A configuration array containing information about the plugin instance.
     * @param string $plugin_id
     *   The plugin ID for the plugin instance.
     * @param mixed $plugin_definition
     *   The plugin implementation definition.
     * @param \Drupal\Core\Routing\RouteProviderInterface $route_provider
     *   The route provider to load routes by name.
     * @param \Drupal\Core\Routing\RedirectDestinationInterface $redirect_destination
     *   The redirect destination.
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition, RouteProviderInterface $route_provider, RedirectDestinationInterface $redirect_destination) {
        parent::__construct($configuration, $plugin_id, $plugin_definition, $route_provider);
        $this->redirectDestination = $redirect_destination;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
        return new static($configuration, $plugin_id, $plugin_definition, $container->get('router.route_provider'), $container->get('redirect.destination'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getOptions(RouteMatchInterface $route_match) {
        $options = parent::getOptions($route_match);
        // Append the current path as destination to the query string.
        $options['query']['destination'] = $this->redirectDestination
            ->get();
        return $options;
    }

}