drowl_paragraphs_bs-1.x-dev/modules/drowl_paragraphs_bs_type_attachments/drowl_paragraphs_bs_type_attachments.module

<?php

/**
 * @file
 * Drowl_paragraphs_bs_type_attachments module.
 */

/**
 * Implements hook_preprocess_paragraph().
 */
function drowl_paragraphs_bs_type_attachments_preprocess_paragraph(&$variables) {
  // Implement attachement paragraph options.
  if ($variables['paragraph']->bundle() === "attachments") {
    $variables['#attached']['library'][] = 'drowl_paragraphs_bs_type_attachments/global';
    if (isset($variables['attributes']['class'])) {
      $button_classes = [];
      foreach ($variables['attributes']['class'] as $class) {
        if (str_starts_with($class, 'btn-')) {
          $variables['attributes']->removeClass($class);
          array_push($button_classes, $class);
        }
      }
      // Pass to elements['#drowl_media'].button_classes so we can merge them
      // into drowl_media/drowl_base media document templates.
      foreach ($variables['content']['field_attachments']['#items'] as $key => $value) {
        $variables['content']['field_attachments'][$key]['#drowl_media']['button_classes'] = $button_classes;
        // @todo As we're operating on a referenced entities outout here, we should
        // also clear the referenced enttity's render cache (by cache tag)
        // on paragraph save, see https://www.drupal.org/project/drowl_paragraphs_bs/issues/3222165
        // @todo @JP still required? not sure how this needs to be modified..
        // $variables['content']['field_attachments'][$key]['#cache']['keys'][] = 'drowl_media:media_link_button_expanded';
      }
    }
  }
}

/**
 * Implements hook_theme().
 */
function drowl_paragraphs_bs_type_attachments_theme($existing, $type, $theme, $path) {
  $templates = $path . '/templates';
  return [
    'paragraph__drowl_paragraphs_bs__attachments' => [
      'base hook' => 'paragraph',
      'path' => $templates,
    ],
  ];
}