fix serviceworker registration and update check

src/app/app.component.ts

@@ -128,10 +128,7 @@ export class AppComponent implements OnInit, OnDestroy {
     }
 
     closeAutoUpdate(): boolean {
-        this.updateAvailable = false;
-        setTimeout(() => {
-            this.updateAvailable = true;
-        }, 2000);
+        this.updateAvailable = false;       
         return false;
     }
 }

src/app/services/service-worker.service.ts

@@ -13,7 +13,7 @@ export class ServiceWorkerService {
     constructor(appRef: ApplicationRef, updates: SwUpdate) {
 
         //https://angular.io/guide/service-worker-communications
-        
+
         updates.available.subscribe(event => {
             console.log('current version is', event.current);
             console.log('available version is', event.available);
@@ -22,11 +22,17 @@ export class ServiceWorkerService {
         });
 
         // Allow the app to stabilize first, before starting polling for updates with `interval()`.
-        const appIsStable$ = appRef.isStable.pipe(first(isStable => isStable === true));
-        const everySixHours$ = interval(2 * 60 * 60 * 1000);
-        const everySixHoursOnceAppIsStable$ = concat(appIsStable$, everySixHours$);
+        //const appIsStable$ = appRef.isStable.pipe(first(isStable => isStable === true));
+        // const everySixHoursOnceAppIsStable$ = concat(appIsStable$, everySixHours$);
+        // everySixHoursOnceAppIsStable$.subscribe(() => { 
+        //     console.warn('wat?');
+        //     updates.checkForUpdate();
+        // });
 
-        everySixHoursOnceAppIsStable$.subscribe(() => updates.checkForUpdate());
+        const updateCheckTimer$ = interval(2 * 60 * 60 * 1000);
+        updateCheckTimer$.subscribe(() => {
+            updates.checkForUpdate();
+        });
     }
 
     loadNewAppVersion() {

src/main.ts

@@ -5,8 +5,13 @@ import { AppModule } from './app/app.module';
 import { environment } from './environments/environment';
 
 if (environment.production) {
-  enableProdMode();
+    enableProdMode();
 }
 
 platformBrowserDynamic().bootstrapModule(AppModule)
-  .catch(err => console.log(err));
+    .then(() => {
+        if ('serviceWorker' in navigator && environment.production) {
+            navigator.serviceWorker.register('./ngsw-worker.js');
+        }
+    })
+    .catch(err => console.log(err));