Add current page path as a class to body tag (code included)

I'm using an old version of this theme so you may have fixed this already but I was noticing the body tag does not have the current url of the page which makes customizing the theming a little harder. I noticed you can fix this by adding this to the .theme file:

Under this line...
function openy_carnation_preprocess_html(array &$variables) {

Add

  // Get the current path
  $current_path = \Drupal::service('path.current')->getPath();
  $internal_path = \Drupal::service('path_alias.manager')->getAliasByPath($current_path);

  // Assign it to body class 
  $variables['attributes']['class'][] = str_replace("/", "", $internal_path);

Apologies if you've already fixed this or if this isn't the best way to do this, it worked great for me. Thanks for your hard work!