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frontend/src/app/Views/dashboard/dashboard.component.ts

@@ -50,6 +50,8 @@ const ELEMENT_DATA: PeriodicElement[] = [
 export class DashboardComponent implements OnInit {
   constructor(private dataService: DataService) {}
 
+  //TODO avoid using ngOnInit() like this
+  //TODO fix server problems
   async ngOnInit() {
     const data = await this.dataService.getStockData();
   }

frontend/src/app/Views/header/header.component.ts

@@ -7,10 +7,14 @@ import { TokenStorageService } from 'src/app/Services/token.service';
   styleUrls: ['./header.component.scss'],
 })
 export class HeaderComponent implements OnInit {
+  /**
+   * @param  {TokenStorageService} privatetokenStorage
+   */
   constructor(private tokenStorage: TokenStorageService) {}
 
   ngOnInit(): void {}
 
+  //logout() clears session storage; All user data is eradicated from it and page is reloaded
   logout() {
     this.tokenStorage.signOut();
     location.reload();

frontend/src/app/Views/login/login.component.ts

@@ -18,17 +18,26 @@ export class LoginComponent implements OnInit {
   errorMessage = '';
   accountName = '';
 
+  /**
+   * @param  {AuthService} privateauthService
+   * @param  {TokenStorageService} privatetokenStorage
+   * @param  {Router} privaterouter
+   */
   constructor(
     private authService: AuthService,
     private tokenStorage: TokenStorageService,
     private router: Router
   ) {}
+
+  //ngOnInit() checks if a
   ngOnInit(): void {
     this.tokenStorage.signOut();
     if (this.tokenStorage.getToken()) {
       this.isLoggedIn = true;
     }
   }
+
+  //onSubmit() saves valuable information in session storage
   onSubmit(): void {
     const { username, password } = this.form;
     this.authService.login(username, password).subscribe(
@@ -47,6 +56,8 @@ export class LoginComponent implements OnInit {
       }
     );
   }
+
+  //reloadPage() reloads the page
   reloadPage(): void {
     window.location.reload();
   }

frontend/src/app/Views/register/register.component.ts

@@ -15,6 +15,11 @@ export class RegisterComponent implements OnInit {
   isSuccessful = false;
   isSignUpFailed = false;
   errorMessage = '';
+
+  /**
+   * @param  {AuthService} privateauthService
+   * @param  {Router} privaterouter
+   */
   constructor(private authService: AuthService, private router: Router) {}
   ngOnInit(): void {}
   onSubmit(): void {

frontend/src/app/app.component.ts

@@ -13,8 +13,8 @@ export class AppComponent {
    * Application title.
    */
   title = 'Aktienbot';
-  showHeader = false;
 
+  showHeader = false;
   isLoggedIn = false;
 
   /**
@@ -26,6 +26,7 @@ export class AppComponent {
     private router: Router,
     private tokenStorage: TokenStorageService
   ) {
+    //check if it is login or registration page, header should not show there
     this.router.events
       .pipe(filter((event) => event instanceof NavigationEnd))
       .subscribe((event) => {
@@ -33,11 +34,15 @@ export class AppComponent {
           (event as NavigationEnd).url === '/login' ||
           (event as NavigationEnd).url === '/register'
         );
+
+        //check if token already exists from past login
         if (this.tokenStorage.getToken()) {
           this.isLoggedIn = true;
         } else {
           this.isLoggedIn = false;
         }
+
+        //prevent user from accessing dashboard if not logged in
         if (
           this.isLoggedIn === false &&
           (event as NavigationEnd).url != '/register'