liveblog_firebase.module

<?php
/**
 * @file
 * The module file.
 */

use \Drupal\liveblog_firebase\Plugin\LiveblogNotificationChannel\FirebaseNotificationChannel;

use \Drupal\node\Entity\Node;
use \Drupal\Core\Url;
use \Drupal\Core\Entity\Display\EntityViewDisplayInterface;

/**
 * Implements hook_ENTITY_TYPE_view().
 */
function liveblog_firebase_node_view(array &$build, Node $node, EntityViewDisplayInterface $display, $view_mode) {
  if ($display->getComponent('liveblog_posts')
    && Drupal::config('liveblog.settings')->get('notification_channel') == FirebaseNotificationChannel::PLUGIN_ID) {

    $config = Drupal::config('liveblog.notification_channel.liveblog_firebase');

    $build['liveblog_posts']['#attached']['library'][] = 'liveblog_firebase/firebase';
    $build['liveblog_posts']['#attached']['drupalSettings']['liveblog_firebase'] = [
      'sender_id' => $config->get('sender_id'),
      'topic' => FirebaseNotificationChannel::createTopicId($node),
      'sw_file' => '/liveblog_firebase/firebase-messaging-sw.js',
    ];

    // Inject manifest.
    $build['#attached']['html_head_link'][] = array(
      array(
        'rel' => 'manifest',
        'href' => "/" . Url::fromRoute('liveblog_firebase.manifest')->getInternalPath(),
      ),
      // Add header.
      FALSE,
    );
  }
}