turbo_spa-1.0.x-dev/turbo_spa.module

<?php

use Drupal\Core\Form\FormStateInterface;

/**
 * Implements hook_page_attachments().
 */
function turbo_spa_page_attachments(array &$page) {

  // @todo Don't add to admin pages.
  $page['#attached']['library'][] = 'turbo_spa/loader';

  // We need to disable snapshot cache on pages with forms to avoid
  // re rendering of previous form validation/submission errors.
  // NB snapshot cache clears when you reload a page!!
  $disable_snapshot = ['entity.node.edit_form', 'node.add'];
  // @todo on all form pages only
  // pages with /add /edit /update ++ .
  // no-preview means don't show previews for this page.
  // no-cache tells turbo to not snapshot.
  $current_route_name = Drupal::routeMatch()->getRouteName();
  if (in_array($current_route_name, $disable_snapshot)) {
    $metas = [
      '#tag' => 'meta',
      '#attributes' => [
        'name' => 'turbo-cache-control',
        'content' => 'no-preview.',
      ],
    ];

    $page['#attached']['html_head'][] = [$metas, 'turbo-cache-control'];
  }

}

/**
 * Implements hook_form_alter().
 */
function turbo_spa_form_alter(array &$form, FormStateInterface $form_state, $form_id) {

  // $form['#validate'][] = 'spa_validate_errors';
  // Couldn't successfully set a redirect after form validation error
  // on login form, disabling turbo on login form
  if ($form_id === 'user_login_form') {
    // Disables turbo drive for login form.
    $form['#attributes']['data-turbo'][] = 'false';
  }
}