feat: Use single instance lock to avoid multiple instances of Vynte Connect

src/main.ts

@@ -10,10 +10,29 @@ if (started) {
   app.quit();
 }
 
-// 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);
+const singleInstanceLock = app.requestSingleInstanceLock()
+
+if (!singleInstanceLock) app.quit();
+else {
+  app.on('second-instance', () => {
+    if (window) {
+      if (window.isMinimized()) window.restore();
+      window.focus();
+    }
+  });
+  app.on('before-quit', disconnect);
+}
+
+app.whenReady().then(() => {
+  createWindow();
+  createTray();
+  refreshStatus();
+  pollTimer = setInterval(refreshStatus, POLL_INTERVAL_MS);
+});
+
+app.on('before-quit', () => {
+  if (pollTimer) clearInterval(pollTimer);
+});
 
 // Quit when all windows are closed, except on macOS. There, it's common
 // for applications and their menu bar to stay active until the user quits
@@ -24,8 +43,6 @@ app.on('window-all-closed', () => {
   }
 });
 
-app.on('before-quit', disconnect);
-
 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.
@@ -209,17 +226,6 @@ function createTray() {
   tray.on('click', showWindow);
 }
 
-app.whenReady().then(() => {
-  createWindow();
-  createTray();
-  refreshStatus();
-  pollTimer = setInterval(refreshStatus, POLL_INTERVAL_MS);
-});
-
-app.on('before-quit', () => {
-  if (pollTimer) clearInterval(pollTimer);
-});
-
 ipcMain.handle('status:get', () => withAutoConnect(cachedStatus));
 ipcMain.handle('status:refresh', refreshStatus);
 ipcMain.handle('vpn:connect', connect);