Angular Service to get/inject current ActivatedRoute + Params

CurrRouteService.ts

import {Injectable}                              from "@angular/core";
import {ActivatedRoute, NavigationEnd, Router}   from "@angular/router";
import {Observable}                              from "rxjs";
import {first, filter, map, switchMap}           from "rxjs/operators";

@Injectable({providedIn: 'root'})
export class CurrRouteService {
  constructor(
    private route: ActivatedRoute, 
    private router: Router
  ){}
  public getActivatedRouteParameter(): Observable<any>
  { // CODE BY @anduser96 Andrei Gatej READ INFO: https://stackoverflow.com/questions/63854458/angular-report-current-route-and-params-to-any-component/63858102#63858102
    let params
    params = this.router.events.pipe(
      filter(e => e instanceof NavigationEnd),
        map((): ActivatedRoute => {
          let route = this.route;
          while (route.firstChild) {
              route = route.firstChild;
          }
          return route;
        }),
        filter((route: ActivatedRoute) => route.outlet === 'primary'),
        switchMap((route: ActivatedRoute) => route.paramMap.pipe(first())) 
	      //FIRST NEEDED TO AVOID PROBLEM WITH ROUTE REUSE -> NEW VALU EMITTED SEE: https://github.com/angular/angular/blob/6768fe9927ad4b9b81c5f8094c42c771d1047f56/packages/router/src/router_state.ts#L422-L448 
        tap(console.log) //MORE INFO ON CREATION OF ActivatedRoute -> SOURCE: https://github.com/angular/angular/blob/6768fe9927ad4b9b81c5f8094c42c771d1047f56/packages/router/src/create_router_state.ts#L76-L80
    );
    return params;
  }
}