import OnlineStatusSubscription from '../services/online-status-subscription.service';

export const isBrowser = typeof window !== 'undefined';

export const browserWindow = isBrowser ? (window as any) : {};

export const getOnlineStatusSubscription = () => {
  if (!browserWindow.globalGridOnlineStatusSubscription) {
    const onlineStatusSubscription = new OnlineStatusSubscription();
    onlineStatusSubscription.start();
    browserWindow.globalGridOnlineStatusSubscription = onlineStatusSubscription;
  }

  return browserWindow.globalGridOnlineStatusSubscription as OnlineStatusSubscription;
};