lossless-cut/src/index.js

const electron = require('electron'); // eslint-disable-line
const isDev = require('electron-is-dev');

const menu = require('./menu');

const { checkNewVersion } = require('./update-checker');

const { app } = electron;
const { BrowserWindow } = electron;

app.name = 'LosslessCut';

if (!isDev) process.env.NODE_ENV = 'production';

// 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 mainWindow;

function createWindow() {
  mainWindow = new BrowserWindow({
    darkTheme: true,
    webPreferences: {
      nodeIntegration: true,
    },
  });
  mainWindow.loadFile(isDev ? 'index.html' : 'build/index.html');

  mainWindow.on('closed', () => {
    // 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.
    mainWindow = null;
  });

  // https://stackoverflow.com/questions/39574636/prompt-to-save-quit-before-closing-window/47434365
  mainWindow.on('close', (e) => {
    const choice = electron.dialog.showMessageBoxSync(mainWindow, {
      type: 'question',
      buttons: ['Yes', 'No'],
      title: 'Confirm quit',
      message: 'Are you sure you want to quit? You will lose all unsaved work',
    });
    if (choice === 1) {
      e.preventDefault();
    }
  });
}

// 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', async () => {
  createWindow();
  menu(app, mainWindow);

  const newVersion = await checkNewVersion();
  if (newVersion) {
    menu(app, mainWindow, newVersion);
  }
});

// Quit when all windows are closed.
app.on('window-all-closed', () => {
  app.quit();
});

app.on('activate', () => {
  // 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();
  }
});

electron.ipcMain.on('renderer-ready', () => {
  if (!isDev) {
    const fileToOpen = process.argv[1];
    // https://github.com/electron/electron/issues/3657
    if (fileToOpen && !fileToOpen.startsWith('-psn_')) mainWindow.webContents.send('file-opened', [fileToOpen]);
  }
});