Fixed issue with downloading and displaying of files

use Drupal\cmrf_core\Core;

use Drupal\Component\Utility\Crypt;

use Drupal\Core\File\Exception\FileException;

use Drupal\Core\File\Exception\InvalidStreamWrapperException;

use Drupal\Core\File\FileSystemInterface;

use Drupal\Core\Form\FormStateInterface;

use Drupal\Core\Link;

use Drupal\image\Entity\ImageStyle;

use Drupal\views\Plugin\views\field\FieldPluginBase;

use Drupal\views\ResultRow;

use GuzzleHttp\Exception\TransferException;

use Symfony\Component\DependencyInjection\ContainerInterface;

/**

      // Download the file and save in the destination.

      if (file_exists($real_path)) {

        // Get file extension.

        $file = pathinfo($attachment['name']);

        $file = pathinfo($attachment['url']);

        if (!empty($file['extension'])) {

          $file_uri_path  = $uri_path . '/' . $attachment['id'] . '.' . $file['extension'];

          $file_real_path = $real_path . '/' . $attachment['id'] . '.' . $file['extension'];

          $ext = '.' . $file['extension'];

        }

        $file_uri_path  = $uri_path . '/' . $attachment['id'] . $ext;

        $file_real_path = $real_path . '/' . $attachment['id'] . $ext;

        if (!file_exists($file_real_path)) {

            system_retrieve_file($attachment['url'], $file_uri_path, FALSE, FileSystemInterface::EXISTS_REPLACE);

          try {

            $data = (string) \Drupal::httpClient()->get($attachment['url'])->getBody();

            return \Drupal::service('file_system')->saveData($data, $file_uri_path, FileSystemInterface::EXISTS_REPLACE);

          }

          catch (TransferException $exception) {

            \Drupal::messenger()->addError(t('Failed to fetch file due to error "%error"', ['%error' => $exception->getMessage()]));

          }

          catch (FileException | InvalidStreamWrapperException $e) {

            \Drupal::messenger()->addError(t('Failed to save file due to error "%error"', ['%error' => $e->getMessage()]));

          }

          //system_retrieve_file($attachment['url'], $file_uri_path, FALSE, FileSystemInterface::EXISTS_REPLACE);

        }

        if (file_exists($file_real_path)) {

          return $this->renderImage($file_real_path);

        }

      }

    }

    }

    return NULL;

  }