docs: add JSDoc comments to app.component.ts

src/app/app.component.ts

@@ -42,6 +42,11 @@ export class AppComponent {
     this.isLoggedIn = this.firebaseService.getCurrentUserId();
   }
 
+  /**
+   * Lifecycle hook that is called after the component has been initialized.
+   *
+   * Checks if the user is logged in by verifying the `isLoggedIn` property.
+   */
   ngOnInit() {
     if (this.isLoggedIn === null) {
       this.checkPwResetRoute();
@@ -51,6 +56,10 @@ export class AppComponent {
     }
   }
 
+  /**
+   * Clears the local storage after a certain time period (12h) has
+   * passed since the last login.
+   */
   checkAndClearLocalStorage() {
     const startTime = localStorage.getItem('sessionTimeJOIN');
 
@@ -64,6 +73,11 @@ export class AppComponent {
     }
   }
 
+  /**
+   * Listens to router events and checks if the current route is one of the
+   * allowed routes for password reset, registration, forgotten password,
+   * or login. If it is not, it navigates to the login page.
+   */
   checkPwResetRoute() {
     this.router.events
       .pipe(filter((event) => event instanceof NavigationEnd))
@@ -78,6 +92,12 @@ export class AppComponent {
       });
   }
 
+  /**
+   * Returns the first segment of the current URL or an empty string if it does not exist.
+   *
+   * @param urlTree The current URL tree.
+   * @returns The first segment of the current URL or an empty string if it does not exist.
+   */
   private getFirstSegment(urlTree: any): string {
     return urlTree.root.children['primary']?.segments[0]?.path || '';
   }