data_fixtures.module

<?php

/**
 * @file
 * Contains data_fixtures.module.
 */

use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 *
 * @param                                          $route_name
 * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
 *
 * @return string
 */
function data_fixtures_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the data_fixtures module.
    case 'help.page.data_fixtures':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('My Awesome Module') . '</p>';
      return $output;

    default:
  }
}

/**
 * Implements hook_file_download().
 */
function data_fixtures_file_download($uri) {
  $scheme = \Drupal::service('file_system')->uriScheme($uri);
  $target = file_uri_target($uri);
  if ($scheme == 'temporary' && $target === 'fixtures.tar.gz') {
    if (\Drupal::currentUser()->hasPermission('export data fixtures')) {
      $request = \Drupal::request();
      $date = DateTime::createFromFormat('U', $request->server->get('REQUEST_TIME'));
      $date_string = $date->format('Y-m-d-H-i');
      $hostname = str_replace('.', '-', $request->getHttpHost());
      $filename = 'fixtures' . '-' . $hostname . '-' . $date_string . '.tar.gz';
      $disposition = 'attachment; filename="' . $filename . '"';
      return [
        'Content-disposition' => $disposition,
      ];
    }
    return -1;
  }
}