Snippet showing Firebase working with Electron Background Process

background.js

// This is main process of Electron, started as first thing when your
// app starts. It runs through entire life of your application.
// It doesn't have any windows which you can see on screen, but we can open
// window from here.

import path from "path";
import url from "url";
import { app, Menu, protocol } from "electron";
import { devMenuTemplate } from "./menu/dev_menu_template";
import { editMenuTemplate } from "./menu/edit_menu_template";
import createWindow from "./helpers/window";



// Special module holding environment variables which you declared
// in config/env_xxx.json file.
import env from "env";


const firebase = require("firebase");
// Required for side-effects
require("firebase/firestore");

var firebase_config = {
  projectId: '<MY_PROJECT_ID>',
  apiKey: "<MY_API_KEY>",
  authDomain: "<MY_PROJECT_ID>.firebaseapp.com",
  databaseURL: "https://<MY_PROJECT_ID>.firebaseio.com",
  storageBucket: "<MY_PROJECT_ID>.appspot.com",
};

firebase.initializeApp(firebase_config);

const setApplicationMenu = () => {
  const menus = [editMenuTemplate];
  if (env.name !== "production") {
    menus.push(devMenuTemplate);
  }
  Menu.setApplicationMenu(Menu.buildFromTemplate(menus));
};

// Save userData in separate folders for each environment.
// Thanks to this you can use production and development versions of the app
// on same machine like those are two separate apps.
if (env.name !== "production") {
  const userDataPath = app.getPath("userData");
  app.setPath("userData", `${userDataPath} (${env.name})`);
}

app.setAsDefaultProtocolClient
app.on("ready", () => {
  setApplicationMenu();

  protocol.registerFileProtocol('ddtest', (request, callback) => {
    const url = request.url;
    console.log("Received Call from ", url);
    callback({path: path.normalize(`${__dirname}/${url}`)})
  }, (error) => {
    if (error) console.error('Failed to register protocol')
  })

  const mainWindow = createWindow("main", {
    width: 1000,
    height: 600
  });

  mainWindow.loadURL(
    url.format({
      pathname: path.join(__dirname, "app.html"),
      protocol: "file:",
      slashes: true
    })
  );

  if (env.name === "development") {
    mainWindow.openDevTools();
  }

  var db = firebase.firestore();
  var docRef = db.collection('users').doc('davydany');

  docRef.get().then((doc) => {
    if (doc.exists) {
      console.log('Document.data: ', doc.data());
    } else {
      console.log('No Such Document');
    }
  }).catch((err) => {
    console.log("Error getting document:", error);
  });

  docRef.onSnapshot((doc) => {
    var source = doc.metadata.hasPendingWrites ? "Local" : "Server";
    console.log(source, " data: ", doc.data());
  });
});

app.on("window-all-closed", () => {
  app.quit();
});