NodeRouteProvider.php

<?php

namespace Drupal\node\Entity;

use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Entity\Routing\EntityRouteProviderInterface;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RouteCollection;

/**
 * Provides routes for nodes.
 */
class NodeRouteProvider implements EntityRouteProviderInterface {
    
    /**
     * {@inheritdoc}
     */
    public function getRoutes(EntityTypeInterface $entity_type) {
        $route_collection = new RouteCollection();
        $route = (new Route('/node/{node}'))->addDefaults([
            '_controller' => '\\Drupal\\node\\Controller\\NodeViewController::view',
            '_title_callback' => '\\Drupal\\node\\Controller\\NodeViewController::title',
        ])
            ->setRequirement('node', '\\d+')
            ->setRequirement('_entity_access', 'node.view');
        $route_collection->add('entity.node.canonical', $route);
        $route = (new Route('/node/{node}/delete'))->addDefaults([
            '_entity_form' => 'node.delete',
            '_title' => 'Delete',
        ])
            ->setRequirement('node', '\\d+')
            ->setRequirement('_entity_access', 'node.delete')
            ->setOption('_node_operation_route', TRUE);
        $route_collection->add('entity.node.delete_form', $route);
        $route = (new Route('/node/{node}/edit'))->setDefault('_entity_form', 'node.edit')
            ->setRequirement('_entity_access', 'node.update')
            ->setRequirement('node', '\\d+')
            ->setOption('_node_operation_route', TRUE);
        $route_collection->add('entity.node.edit_form', $route);
        return $route_collection;
    }

}