oliverdavies.uk/modules/opd_podcast/opd_podcast.module

<?php

declare(strict_types=1);

use Drupal\Core\Render\BubbleableMetadata;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\node\NodeInterface;
use Drupal\taxonomy\TermInterface;

/**
 * @param array<non-empty-string, array<non-empty-string, array{}>> $links
 * @param array<non-empty-string, mixed> $context
 */
function opd_podcast_node_links_alter(array &$links, NodeInterface $entity, array &$context): void {
  if ($entity->bundle() !== 'podcast_episode') {
    return;
  }

  $links['node']['#links']['node-readmore']['title'] = t('Listen now<span class="visually-hidden"> to @title</span> →');

  $links['node']['#links']['node-readmore']['attributes']['class'] = [
    'p-0',
  ];

  $links['#attributes']['class'][] = 'list-none';
  $links['#attributes']['class'][] = 'm-0';
  $links['#attributes']['class'][] = 'p-0';
}

/**
 * Implements hook_token_info().
 *
 * @return array{tokens: array<non-empty-string, array{description: TranslatableMarkup, name: TranslatableMarkup}[]>, types: array<non-empty-string, array{description: TranslatableMarkup, name: TranslatableMarkup}>}
 */
function opd_podcast_token_info(): array {
  $tokens = [];

  $type = [
    'description' => t('Tokens related to podcasts.'),
    'name' => t('Podcasts'),
  ];

  $tokens['guest-names'] = [
    'description' => t('The names of the guests on a podcast episode.'),
    'name' => t('Guest names'),
  ];

  return [
    'tokens' => [
      'opd-podcast' => $tokens,
    ],
    'types' => [
      'opd-podcast' => $type,
    ],
  ];
}

/**
 * Implements hook_tokens().
 *
 * @param array<non-empty-string, non-empty-string> $tokens
 * @param array<non-empty-string, mixed> $data
 * @param array<non-empty-string, mixed> $options
 *
 * @return array<non-empty-string, mixed>
 */
function opd_podcast_tokens(string $type, array $tokens, array $data, array $options, BubbleableMetadata $bubbleableMetadata) : array {
  $replacements = [];

  if ($type === 'opd-podcast') {
    foreach ($tokens as $name => $original) {
      switch ($name) {
        case 'guest-names':
          $node = $data['node'] ?? NULL;
          assert($node instanceof NodeInterface);
          assert($node->hasField('field_podcast_guests'));

          $guests = $node->get('field_podcast_guests')->referencedEntities();
          assert(is_array($guests));
          assert(!is_null($guests[0]));
          assert($guests[0] instanceof TermInterface);

          $replacements[$original] = $guests[0]->label();
          break;
      }
    }
  }

  return $replacements;
}