materio-d8/web/modules/custom/materio_flag/src/Controller/MaterioFlagController.php

<?php

namespace Drupal\materio_flag\Controller;

use Drupal\Core\Controller\ControllerBase;
use Symfony\Component\DependencyInjection\ContainerInterface;
// use Drupal\Core\Entity\EntityManagerInterface;
// use Drupal\language\ConfigurableLanguageManagerInterface;
// use Drupal\Core\Render\RendererInterface;
// use Drupal\Core\Entity\EntityTypeManagerInterface;
// use Drupal\Core\Cache\CacheableJsonResponse;
// use Drupal\Core\Cache\CacheableMetadata;
use Symfony\Component\HttpFoundation\JsonResponse;
// use Drupal\Core\Url;
// use Drupal\core\render\RenderContext;
use Drupal\flag_lists\FlagListsService;

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

  /**
   * Drupal\Core\Entity\EntityManagerInterface definition.
   *
   * @var \Drupal\Core\Entity\EntityManagerInterface
   */
  // protected $entityManager;
  /**
   * Drupal\language\ConfigurableLanguageManagerInterface definition.
   *
   * @var \Drupal\language\ConfigurableLanguageManagerInterface
   */
  // protected $languageManager;
  /**
   * Drupal\Core\Render\RendererInterface definition.
   *
   * @var \Drupal\Core\Render\RendererInterface
   */
  // protected $renderer;
  /**
   * Drupal\Core\Render\RendererInterface definition.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  // protected $entityTypeManager;

  /**
   * Drupal\Core\Render\RendererInterface definition.
   *
   * @var \Drupal\flag_lists\FlagListsService
   */
  protected $flaglists;

  /**
   * Constructs a new AjaxHomeController object.
   */
  // public function __construct(EntityManagerInterface $entity_manager, ConfigurableLanguageManagerInterface $language_manager, RendererInterface $renderer, EntityTypeManagerInterface $entity_type_manager) {
  //   $this->entityManager = $entity_manager;
  //   $this->languageManager = $language_manager;
  //   $this->renderer = $renderer;
  //   $this->entityTypeManager = $entity_type_manager;
  // }
  public function __construct(FlagListsService $flag_lists_service ) {
   $this->flaglists = $flag_lists_service;
  }

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

  /**
   * Hello.
   *
   * @return string
   *   Return Hello string.
   */
  public function getUsersFlaggingCollections() {

    // $data['data'] = ['test', 'hello'];

    // $data['data'] = $this->flaglists->getUsersFlaggingCollections();

    // $data['#cache'] = [
    //   // 'max-age' => \Drupal\Core\Cache\Cache::PERMANENT,
    //   'tags' => ['materio-flag-cache'],
    //   // 'contexts' => [
    //   //   'languages:language_content'
    //   // ]
    // ];
    // $response = new CacheableJsonResponse($data);
    // $response->addCacheableDependency(CacheableMetadata::createFromRenderArray($data));
    // return $response;

    $colls = $this->flaglists->getUsersFlaggingCollections();

    $data = [];
    foreach ($colls as $id => $collection) {
      $data[] = array(
        "id" => $id,
        "name" => $collection->getName()
      );
    }

    return new JsonResponse($data);
  }

}