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

<?php

// https://developpeur-drupal.com/article/injection-dependances-lors-heritage-classe-qui-implemente-controllerbase

namespace Drupal\materio_flag\Controller;

use Drupal\Core\Controller\ControllerBase;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Drupal\Core\Session\AccountProxy;
use Drupal\Core\Session\AccountProxyInterface;
use Drupal\Core\Render\RendererInterface;
use Drupal\flag\FlagInterface;
use Drupal\flag\FlagServiceInterface;
use Drupal\flag_lists\FlagListsService;
use Drupal\flag_lists\FlagListsServiceInterface;
use Drupal\flag_lists\Entity\FlaggingCollection;
use Drupal\flag_lists\Controller\ActionLinkController;
use Drupal\flag_lists\Controller\ActionLinkHelper;
use Drupal\flag_lists\Entity\FlagListItem;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\JsonResponse;

/**
 * Class AjaxHomeController.
 */
class MaterioFlagActionsController extends ActionLinkController {

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

  /**
   * Constructs a new MaterioFlagController object.
   */
  public function __construct(
    FlagServiceInterface $flag,
    FlagListsServiceInterface $flag_lists,
    RendererInterface $renderer
  ) {
   parent::__construct($flag, $flag_lists, $renderer);
  }

  public function flaglistentity(Request $request) {
    $post_data = json_decode( $request->getContent(),TRUE);
    $flagid = $post_data['flagid'];
    $uuid = $post_data['uuid'];
    $flagcollid = $post_data['flagcollid'];

    // $flagcoll = $this->flagListsService->getFlaggingCollectionById($flagcollid);
    // $flag = $flagcoll->getRelatedFlag();
    $flag = $this->flagService->getFlagById($flagid);

    $node = \Drupal::service('entity.repository')->loadEntityByUuid('node', $uuid);
    $nid = $node->id();

    // call the parent flag function
    $this->flag($flag, $nid, $flagcollid);

    // // OR rewrite it entirely
    // $entity = $this->flagService->getFlaggableById($flag, $nid);
    // // flag
    // $this->flagService->flag($flag, $entity);
    // // Create the flag list item.
    // // $actionLinkHelper = new ActionLinkHelper($this->flagListsService);
    // // $actionLinkHelper->flagHelper($flag, $nid, $flagcoll);
    // $flag_list_item = FlagListItem::create([
    //   'entity_id' => $nid,
    //   'type' => $flag->getFlaggableEntityTypeId(),
    //   'baseflag' => $flagid,
    //   'flag_list' => $flagcollid,
    //   'name' => $flagcoll->getName() . ' ' . $nid,
    // ]);
    // $flag_list_item->save();

    $data = [
      'flag' => $flag->toArray(),
      'flagid' => $flagid,
      'entity_id' => $nid,
      'entity_uuid' => $uuid,
      'flagcollid' => $flagcollid,
      // 'post_data' => $post_data,
      // 'flaggableEntityTypeId' => $flag->getFlaggableEntityTypeId(),
      // 'entity_title' => $entity->get('title')->value,
      // 'flag_list_item' => $flag_list_item->getName(),
    ];
    return new JsonResponse($data);
  }

  public function unFlaglistentity(Request $request) {
    $post_data = json_decode( $request->getContent(),TRUE);
    $flagid = $post_data['flagid'];
    $uuid = $post_data['uuid'];
    $flagcollid = $post_data['flagcollid'];
    // get flag
    $flag = $this->flagService->getFlagById($flagid);
    // get the nid from uuid
    $node = \Drupal::service('entity.repository')->loadEntityByUuid('node', $uuid);
    $nid = $node->id();
    // call the parent flag function
    $this->unflag($flag, $nid, $flagcollid);
    // response
    $data = [
      'flag' => $flag->toArray(),
      'flagid' => $flagid,
      'entity_id' => $nid,
      'entity_uuid' => $uuid,
      'flagcollid' => $flagcollid,
    ];
    return new JsonResponse($data);
  }
}