Add auto updater code

src/main/index.ts

@@ -1,11 +1,16 @@
-import { app, shell, BrowserWindow, ipcMain } from 'electron'
+import { app, shell, BrowserWindow, ipcMain, Notification } from 'electron'
 import { join } from 'path'
 import { electronApp, optimizer, is } from '@electron-toolkit/utils'
 import icon from '../../resources/icon.png?asset'
+import { autoUpdater } from 'electron-updater'
 
+autoUpdater.autoDownload = false;
+autoUpdater.autoInstallOnAppQuit = true;
+
+let mainWindow;
 function createWindow(): void {
   // Create the browser window.
-  const mainWindow = new BrowserWindow({
+  mainWindow = new BrowserWindow({
     width: 900,
     height: 670,
     show: false,
@@ -59,6 +64,8 @@ app.whenReady().then(() => {
     // dock icon is clicked and there are no other windows open.
     if (BrowserWindow.getAllWindows().length === 0) createWindow()
   })
+
+  checkForUpdates();
 })
 
 // Quit when all windows are closed, except on macOS. There, it's common
@@ -72,3 +79,39 @@ app.on('window-all-closed', () => {
 
 // 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.
+function showNotification(value: any) {
+  new Notification({
+    title: value,
+  }).show()
+}
+
+function checkForUpdates() {
+  autoUpdater.checkForUpdates();
+  console.log(`Checking for updates. Current version ${app.getVersion()}`);
+  showNotification(`Checking for updates. Current version ${app.getVersion()}`);
+}
+
+/*New Update Available*/
+autoUpdater.on("update-available", () => {
+  console.log(`Update available. Current version ${app.getVersion()}`);
+  showNotification(`Update available. Current version ${app.getVersion()}`);
+  let pth = autoUpdater.downloadUpdate();
+  console.log(pth);
+  showNotification(pth);
+});
+
+autoUpdater.on("update-not-available", () => {
+  console.log(`No update available. Current version ${app.getVersion()}`);
+  showNotification(`No update available. Current version ${app.getVersion()}`);
+});
+
+/*Download Completion Message*/
+autoUpdater.on("update-downloaded", () => {
+  console.log(`Update downloaded. Current version ${app.getVersion()}`);
+  showNotification(`Update downloaded. Current version ${app.getVersion()}`);
+});
+
+autoUpdater.on("error", (info) => {
+  console.log(info);
+  showNotification(info);
+});