main.js

const electron = require('electron')
// Module to control application life.
const app = electron.app
// Module to create native browser window.
const BrowserWindow = electron.BrowserWindow

const path = require('path')
const url = require('url')
const {ipcMain} = require('electron')

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let welcomeWindow
let connectionWindow
let messengerWindow

function createWindow () {
  // Create the browser window.
  welcomeWindow = new BrowserWindow({width: 500, height: 635, frame: false, backgroundColor: '#fff'})

  welcomeWindow.loadURL(url.format({
    pathname: path.join(__dirname, 'views/welcome.html'),
    protocol: 'file:',
    slashes: true
  }))

  //welcomeWindow.webContents.openDevTools()

  // Emitted when the window is closed.
  welcomeWindow.on('closed', function () {
    // Dereference the window object, usually you would store windows
    // in an array if your app supports multi windows, this is the time
    // when you should delete the corresponding element.
    welcomeWindow = null
  })
}

ipcMain.on('open-connection-window', function () {
    if (connectionWindow) {
        return;
    }

    connectionWindow = new BrowserWindow({width: 650, height: 310, frame: false, backgroundColor: '#fff'})

    connectionWindow.loadURL(url.format({
      pathname: path.join(__dirname, 'views/connection.html'),
      protocol: 'file:',
      slashes: true
    }))

    //connectionWindow.webContents.openDevTools()

    connectionWindow.on('closed', function () {
        connectionWindow = null;
    })
})

ipcMain.on('open-messenger-window-startup', function () {
    if (messengerWindow) {
        return;
    }

    let screen = electron.screen.getPrimaryDisplay()
    let dimensions = screen.workAreaSize

    messengerWindow = new BrowserWindow({width: 640, height: 800, frame: false, backgroundColor: '#fff'})

    messengerWindow.loadURL(url.format({
      pathname: path.join(__dirname, 'views/messenger.html'),
      protocol: 'file:',
      slashes: true
    }))

    //messengerWindow.webContents.openDevTools()

    messengerWindow.on('closed', function () {
        connectionWindow = null;
    })
})

ipcMain.on('open-messenger-window', function () {
    if (messengerWindow) {
        return;
    }

    welcomeWindow.close()
    connectionWindow.close()

    let screen = electron.screen.getPrimaryDisplay()
    let dimensions = screen.workAreaSize

    messengerWindow = new BrowserWindow({width: 640, height: 800, frame: false, backgroundColor: '#fff'})

    messengerWindow.loadURL(url.format({
      pathname: path.join(__dirname, 'views/messenger.html'),
      protocol: 'file:',
      slashes: true
    }))

    //messengerWindow.webContents.openDevTools()

    messengerWindow.on('closed', function () {
        connectionWindow = null;
    })
})

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', createWindow)

// Quit when all windows are closed.
app.on('window-all-closed', function () {
  // On OS X it is common for applications and their menu bar
  // to stay active until the user quits explicitly with Cmd + Q
  if (process.platform !== 'darwin') {
    app.quit()
  }
})

app.on('activate', function () {
  // On OS X it's common to re-create a window in the app when the
  // dock icon is clicked and there are no other windows open.
  if (mainWindow === null) {
    createWindow()
  }
})

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.