materio-d8/web/modules/custom/materio_user/src/Controller/MaterioCommerceTermsViewer.php

<?php

namespace Drupal\materio_commerce\Controller;

use Drupal\Core\Controller\ControllerBase;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Drupal\Core\Language\LanguageManagerInterface;
use Drupal\Core\Url;
use Symfony\Component\HttpFoundation\Request;
// use Symfony\Component\HttpFoundation\JsonResponse;
use Drupal\config_pages\Entity\ConfigPages;
use Drupal\config_pages\Entity\ConfigPagesType;

/**
 * Class AjaxHomeController.
 */
class MaterioCommerceTermsViewer extends ControllerBase {


  /*
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $languageManager;

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static(
      $container->get('language_manager')
    );
  }

  /**
   * Constructs a new MaterioDecoupledLanguageLinks object.
   *
   * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
   *   The language manager.
   */
  public function __construct(LanguageManagerInterface $language_manager) {
    $this->languageManager = $language_manager;
  }

  /**
   * getTerms
   *
   * @return string
   *   Return config_page terms_of_services display.
   */
  public function getTos(Request $request) {
    $config_page = $this->getConfigPage();

    // Correct metatags attachment.
    if (function_exists('metatag_get_tags_from_route')) {
      $metatag_attachments = &drupal_static('metatag_attachments');
      $metatag_attachments = metatag_get_tags_from_route($config_page);
    }

    return parent::entityTypeManager()->getViewBuilder('config_pages')->view($config_page, 'full');

  }

  public function getTitle(Request $request) {
    $config_page = $this->getConfigPage();
    return $config_page->get('field_title')->getString();
  }

  private function getConfigPage(){
    return ConfigPages::load("terms_of_services");
  }
}