Ruby on Rails でFCMを使う時のメモ

// Notification click
self.addEventListener('notificationclick', function(event) {
  let url = event.notification.data.FCM_MSG.data.url;

  event.notification.close(); // Android needs explicit close.
  event.waitUntil(
    clients.matchAll({ includeUncontrolled: true, type: 'window' }).then( windowClients => {
      // Check if there is already a window/tab open with the target URL
      for (let i = 0; i < windowClients.length; i++) {
        let client = windowClients[i];
        // If so, just focus it.
        if (client.url === url && 'focus' in client) {
          return client.focus();
        }
      }
      // If not, then open the target URL in a new window/tab.
      if (clients.openWindow) {
        return clients.openWindow(url);
      }
    })
  );
});

  // Handle incoming messages while focusing
  messaging.onMessage(function(payload) {
    const { title, body, icon } = payload.notification
    const url = payload.data.url
    navigator.serviceWorker.getRegistration('/firebase-cloud-messaging-push-scope').then(registration => {
      registration.showNotification(
        title,
        {
          body,
          icon,
          data: {
            FCM_MSG: {
              data: {
                url
              }
            }
          }
        }
      )
    });
  });

class PushNotificationJob < ApplicationJob
  queue_as :default

  DEFAULT_ICON = 'https://hogehoge.ico'

  def perform(token, options = {})
    fcm = FCM.new(ENV['FIREBASE_SERVER_KEY'])

    options = {
      priority: 'high',
      notification: {
        title: options[:title],
        body: options[:body],
        icon: options[:icon] || DEFAULT_ICON,
      },
      data: {
        url: options[:url] || '/'
      }
    }

    registration_ids = [token]

    fcm.send(registration_ids, options) if registration_ids.any?
  end
end