main.js

const { app, BrowserWindow, ipcMain, shell } = require('electron');
const path = require('path');

// Constants
const inDevelopmentMode = (process.env.MODE === 'dev')

// Main window reference
let mainWindow = null;

/**
 * Create Window
 * @note Creates the applications 'main' window and loads the root file
 */
function createWindow() {
	// Configure our main window
	mainWindow = new BrowserWindow({
		width:600,
		height:400
	});
	// Display devleoper tools
	if (inDevelopmentMode)
		mainWindow.webContents.openDevTools()
	// Load primary UI
	mainWindow.loadURL(inDevelopmentMode ? `http://localhost:9000` : `file://${__dirname}/build/index.html`);
	// Handle 'closed' window event
	mainWindow.on('closed', () => {
		if (process.platform !== 'darwin') app.quit();
	});
}

/**
 * Application Ready
 * @note Called when the application has finished initializing and is ready to display the initial window.
 */
app.on('ready', createWindow);

/**
 * Application Closed
 * @note MacOS will commonly keep the application active until the user completely quits with Command+Q or Menu>Quit.
 */
app.on('window-all-closed', () => {
	if (process.platform !== 'darwin') app.quit()
});

/**
 * Application Active
 * @note MacOS will activate and application when it's returns from the background.
 * @note For example, when the user selects the icon in the dock or title bar.
 */
app.on('activate', () => {
	if (mainWindow === null) createWindow()
});

/**
 * Open Link
 * @note Opens the specified link externally in the users default browser.
 */
ipcMain.on('link:open', (event, link) => {
	if ('string' === typeof link && link.length > 0)
		shell.openExternal(link);
});