feat: Update check and notification for new electron versions (#589)

Co-authored-by: valia fetisov <[email protected]>

electron/.prettierrc

@@ -0,0 +1,7 @@
+{
+    "tabWidth": 4,
+    "semi": true,
+    "singleQuote": true,
+    "arrowParens": "avoid",
+    "printWidth": 119
+}

electron/main.js

@@ -1,19 +1,32 @@
 const path = require('path');
 const url = require('url');
-const { app, BrowserWindow, shell } = require('electron');
+const semverGt = require('semver/functions/gt');
+const { app, BrowserWindow, shell, ipcMain } = require('electron');
+const { autoUpdater } = require('electron-updater');
+const currentPackage = require('./package.json');
+
+autoUpdater.autoDownload = false;
 
 function createWindow() {
-    const mainWindow = new BrowserWindow({ show: false });
+    const mainWindow = new BrowserWindow({
+        show: false,
+        webPreferences: {
+            preload: path.join(__dirname, 'preload.js'),
+        },
+    });
     mainWindow.once('ready-to-show', () => {
         mainWindow.maximize();
     });
+
+    // open dist/index.html using file protocol
     mainWindow.loadURL(
         url.format({
             protocol: 'file',
             slashes: true,
             pathname: path.join(__dirname, 'dist/index.html'),
         })
     );
+
     // open external links in the default browser instead of a new window
     mainWindow.webContents.setWindowOpenHandler(details => {
         if (!details.url.startsWith('/')) {
@@ -27,6 +40,37 @@ function createWindow() {
 
 app.whenReady().then(() => {
     createWindow();
+
+    // provide method to check for updates
+    ipcMain.handle('checkForUpdates', async () => {
+        const releasesUrl = `${currentPackage.repository.url}/releases`;
+        try {
+            const updateCheckResult = await autoUpdater.checkForUpdates();
+            const isNewerVersionAvailable = semverGt(updateCheckResult.updateInfo.version, currentPackage.version);
+            if (isNewerVersionAvailable) {
+                return {
+                    version: currentPackage.version,
+                    status: 'available',
+                    url: `${releasesUrl}/latest`,
+                };
+            } else {
+                return {
+                    version: currentPackage.version,
+                    status: 'unavailable',
+                    url: releasesUrl,
+                };
+            }
+        } catch (error) {
+            console.error('Error while retrieving updates', error.message);
+            return {
+                version: currentPackage.version,
+                status: 'error',
+                url: releasesUrl,
+                errorMessage: error.message,
+            };
+        }
+    });
+
     // On macOS it's common to re-create a window in the app when the
     // dock icon is clicked and there are no other windows open.
     app.on('activate', () => {