Example code

Basically, this module is a wrapper around kreait/firebase-php, so its documentation can be helpful.

The API for this module is in https://git.drupalcode.org/project/firebase_php/-/blob/7.0.x/src/FirebasePhpMessagingApiInterface.php?ref_type=heads.

Here's an actual example of how I send notifications to users. Note that I am using Push Notifications Registration Tokens → to store the push tokens.

  if ($unread_message_count) {
      $registration_tokens_service = \Drupal::service('push_notifications_registration_tokens.process_tokens');
      $push_tokens = $registration_tokens_service->getAllTokensForUser($current_user);

      /** @var \Drupal\firebase_php\Service\FirebasePhpMessagingApi $messageService */
      $messageService = \Drupal::service('firebase_php.messaging_drupal_api');
      // Send push notifications for all registered devices.
      $notification_title = 'You have new messages';
      $notification_body = 'You have' . $unread_message_count. ' unread messages.';
      $messageService->sendMessageMultipleDevices(
        $push_tokens,
        $notification_title,
        $notification_body,
        NULL,
        NULL,
        NULL,
        $unread_message_count,
      );
    }

I'm going to mark this as fixed. Feel free to re-open if you're still having issues.

Automatically closed - issue fixed for 2 weeks with no activity.