o365-2.0.3/modules/o365_teams/src/Controller/TeamsRecipientAutocompleteController.php

<?php

namespace Drupal\o365_teams\Controller;

use Drupal\Component\Utility\Xss;
use Drupal\Core\Controller\ControllerBase;
use Drupal\o365\GraphService;
use Microsoft\Graph\Model\User;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;

/**
 * Custom controller for the autocomplete callback.
 */
final class TeamsRecipientAutocompleteController extends ControllerBase {

  /**
   * The graph service.
   *
   * @var \Drupal\o365\GraphService
   */
  protected $graphService;

  /**
   * Constructor for our custom controller.
   *
   * @param \Drupal\o365\GraphService $graphService
   *   The Graph service.
   */
  public function __construct(GraphService $graphService) {
    $this->graphService = $graphService;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container->get('o365.graph'));
  }

  /**
   * Handle our autocomplete request.
   *
   * @param \Symfony\Component\HttpFoundation\Request $request
   *   The request where we can get the parameters from.
   *
   * @return \Symfony\Component\HttpFoundation\JsonResponse
   *   The JSON response used in the form.
   *
   * @throws \Drupal\Core\TempStore\TempStoreException
   * @throws \GuzzleHttp\Exception\GuzzleException
   * @throws \League\OAuth2\Client\Provider\Exception\IdentityProviderException
   */
  public function handleAutocomplete(Request $request) {
    $results = [];
    $input = $request->query->get('q');

    // Get the typed string from the URL, if it exists.
    if (!$input) {
      return new JsonResponse($results);
    }

    // XSS clean the input.
    $input = Xss::filter($input);

    // Set the endpoint and do the request.
    $endpoint = '/me/people/?$search=' . $input . '&$select=displayName,personType,userPrincipalName&$top=20&$filter=personType/class eq \'Person\' and personType/subclass eq \'OrganizationUser\'';
    $data = $this->graphService->getGraphData($endpoint, 'GET', FALSE, FALSE, User::class);

    if (!empty($data)) {
      /** @var \Microsoft\Graph\Model\User $user */
      foreach ($data as $user) {
        $results[] = [
          'value' => $user->getDisplayName() . ' (' . $user->getUserPrincipalName() . ')',
          'label' => $user->getDisplayName(),
        ];
      }
    }

    return new JsonResponse($results);
  }

}