null check windowMain.win

src/main/menu.main.ts

@@ -67,6 +67,10 @@ export class MenuMain {
     }
 
     private initContextMenu() {
+        if (this.main.windowMain.win == null) {
+            return;
+        }
+
         const selectionMenu = Menu.buildFromTemplate([
             { role: 'copy' },
             { type: 'separator' },

src/main/messaging.main.ts

@@ -62,6 +62,10 @@ export class MessagingMain {
         }
 
         this.syncTimeout = global.setTimeout(() => {
+            if (this.main.windowMain.win == null) {
+                return;
+            }
+
             this.main.windowMain.win.webContents.send('messagingService', {
                 command: 'checkSyncVault',
             });

src/main/updater.main.ts

@@ -28,6 +28,11 @@ export class UpdaterMain {
 
         autoUpdater.on('update-available', () => {
             if (this.doingUpdateCheckWithFeedback) {
+                if (this.main.windowMain.win == null) {
+                    this.reset();
+                    return;
+                }
+
                 const result = dialog.showMessageBox(this.main.windowMain.win, {
                     type: 'info',
                     title: this.main.i18nService.t('updateAvailable'),
@@ -48,7 +53,7 @@ export class UpdaterMain {
         });
 
         autoUpdater.on('update-not-available', () => {
-            if (this.doingUpdateCheckWithFeedback) {
+            if (this.doingUpdateCheckWithFeedback && this.main.windowMain.win != null) {
                 dialog.showMessageBox(this.main.windowMain.win, {
                     message: this.main.i18nService.t('noUpdatesAvailable'),
                 });
@@ -60,6 +65,10 @@ export class UpdaterMain {
         autoUpdater.on('update-downloaded', (info) => {
             this.main.menuMain.updateMenuItem.label = this.main.i18nService.t('restartToUpdate');
 
+            if (this.main.windowMain.win == null) {
+                return;
+            }
+
             const result = dialog.showMessageBox(this.main.windowMain.win, {
                 type: 'info',
                 title: this.main.i18nService.t('restartToUpdate'),

src/services/desktopMainMessaging.service.ts

@@ -7,7 +7,9 @@ export class DesktopMainMessagingService implements MessagingService {
 
     send(subscriber: string, arg: any = {}) {
         const message = Object.assign({}, { command: subscriber }, arg);
-        this.main.windowMain.win.webContents.send('messagingService', message);
         this.main.messagingMain.onMessage(message);
+        if (this.main.windowMain.win != null) {
+            this.main.windowMain.win.webContents.send('messagingService', message);
+        }
     }
 }