A redux-observable epic that handles first time sign-in

sign-in-window.js

import { BrowserWindow } from 'electron';
import { REHYDRATE } from 'redux-persist/constants';
import { getWorkspacesCount } from '../reducers/workspaces';

const signInWindowEpic = (action$, store) => {
  // Rehydrate is just a $10 word for "we loaded saved state from a file"
  // Since we're a redux-persist app, it's one of the first actions that occurs 
  return action$.ofType(REHYDRATE)
    .filter(() => getWorkspacesCount(store) > 0)
    .map(() => createSignInWindow(store))
    .do((browserWindow) => browserWindow.show());
};

function createSignInWindow(store) {
  const browserWindow = new BrowserWindow( /* ... you get the idea */ );
}