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

<?php

/**
 * @file
 * Drowl_paragraphs_bs_type_gallery module.
 */

use Drupal\Core\Template\Attribute;

/**
 * Prepared variables for paragraph output.
 */
function drowl_paragraphs_bs_type_gallery_preprocess_paragraph(&$variables) {
  if ($variables['paragraph']->bundle() == 'gallery') {
    $variables['#attached']['library'][] = 'drowl_paragraphs_bs_type_gallery/global';
    $variables['gallery_attributes'] = new Attribute();
    $variables['image_wrapper_attributes'] = new Attribute();
    if (isset($variables['attributes']['class'])) {
      foreach ($variables['attributes']['class'] as $class) {
        if (str_starts_with($class, 'gallery-grid--') || str_starts_with($class, 'gap-')) {
          $variables['attributes']->removeClass($class);
          $variables['gallery_attributes']->addClass($class);
        }
        elseif (str_starts_with($class, 'img-wrapper__')) {
          $variables['attributes']->removeClass($class);
          $variables['image_wrapper_attributes']->addClass(str_replace('img-wrapper__', '', $class));
        }
        elseif (str_starts_with($class, 'img-') || str_starts_with($class, 'ratio')) {
          $variables['attributes']->removeClass($class);
          $variables['image_wrapper_attributes']->addClass($class);
        }
      }
    }
  }
}

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