Angular code to get Router Loading Status

import { Injectable } from '@angular/core';
import {
  ActivatedRoute,
  NavigationCancel,
  NavigationEnd,
  NavigationError,
  NavigationStart,
  Router,
} from '@angular/router';
import { BehaviorSubject, Observable, filter, map } from 'rxjs';

@Injectable({
  providedIn: 'root',
})
export class RoutingStatus {
  private routingInProgress = new BehaviorSubject<boolean>(false);
  private routingInProgress$ = this.routingInProgress.asObservable();
  // create private variable for subscriptions;
  // create decorator to unsubscribe subscriptions

  constructor(
    private route: ActivatedRoute,
    private router: Router,
  ) {
    this.listenRouterLoadingStatus();
  }

  getRouterLoadingStatus(): Observable<boolean> {
    return this.routingInProgress$;
  }

  setRouterLoadingStatus(latestValue: boolean) {
    return this.routingInProgress.next(latestValue);
  }

  listenRouterLoadingStatus(): void {
    this.router.events.subscribe((event) => {
      if (event instanceof NavigationStart) {
        this.setRouterLoadingStatus(true);
      }
      if (event instanceof NavigationEnd) {
        this.setRouterLoadingStatus(false);
      }
      // Set loading state to false in both of the below events to hide the spinner in case a request fails
      if (event instanceof NavigationCancel) {
        this.setRouterLoadingStatus(false);
      }
      if (event instanceof NavigationError) {
        this.setRouterLoadingStatus(false);
      }
    });
  }

  // Get Current / Active Router Config
  getCurrentRouterConfig(): Observable<ActivatedRoute> {
    return this.router.events.pipe(
      filter((event) => event instanceof NavigationEnd),
      map(() => this.route),
      map((route) => {
        while (route.firstChild) {
          route = route.firstChild;
        }
        return route;
      }),
      filter((route) => route.outlet === 'primary'),
      // mergeMap(route => route.title)
    );
  }

  // ngOnDestroy(): void {
  //   // unsubscribe subscriptions;
  // }
  // ngOnDestroy(): void {
  //   Object.keys(this.subscriptions).forEach(key => this.subscriptions[key].unsubscribe());
  // }
}