UserPageRedirect

<?php

namespace Drupal\example\EventSubscriber;

use Drupal\Core\Routing\CurrentRouteMatch;
use Drupal\Core\Session\AccountProxyInterface;
use Drupal\Core\Url;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;

/**
 * Class UserPageRedirect.
 */
class UserPageRedirect implements EventSubscriberInterface {

  /**
   * Drupal\Core\Routing\CurrentRouteMatch definition.
   *
   * @var \Drupal\Core\Routing\CurrentRouteMatch
   */
  protected $currentRouteMatch;
  /**
   * Drupal\Core\Session\AccountProxyInterface definition.
   *
   * @var \Drupal\Core\Session\AccountProxyInterface
   */
  protected $currentUser;

  /**
   * Constructs a new UserPageRedirect object.
   *
   * @param \Drupal\Core\Routing\CurrentRouteMatch $current_route_match
   *   The current route match.
   * @param \Drupal\Core\Session\AccountProxyInterface $current_user
   *   The current user.
   */
  public function __construct(CurrentRouteMatch $current_route_match, AccountProxyInterface $current_user) {
    $this->currentRouteMatch = $current_route_match;
    $this->currentUser = $current_user;
  }

  /**
   * {@inheritdoc}
   */
  public static function getSubscribedEvents() {
    $events[KernelEvents::RESPONSE] = ['onPageView'];

    return $events;
  }

  /**
   * Called whenever the kernel.response event is dispatched.
   *
   * @param \Symfony\Component\HttpKernel\Event\FilterResponseEvent $event
   *   The response event.
   */
  public function onPageView(FilterResponseEvent $event) {
    // Only concern ourselves with a few routes.
    $redirected_routes = [
      'entity.user.canonical',
    ];
    $current_route = $this->currentRouteMatch->getRouteName();
    if (!in_array($current_route, $redirected_routes)) {
      return;
    }
    // user.page is only viewable by the current user.
    if ($url = Url::fromRoute('entity.user.edit_form', ['user' => $uid])) {
      if ($url->access()) {
        $response = new RedirectResponse($url->toString());
        $event->setResponse($response);
      }
    }
  }

}