navigation-service.service.ts
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	import {Injectable} from '@angular/core';
	import {ActivatedRoute, Params, Router} from '@angular/router';

	@Injectable()
	export class NavigationServiceService {

	constructor( private router: Router,
	private activatedRoute: ActivatedRoute ) {
	}

	/**
	* updateRoute
	* routes to the active url with the actual or passed query params of this class.
	*/
	updateRoute(qParams?: Params, relPath?: string) {
	if ( relPath ) {
	this.router.navigate([relPath], { relativeTo: this.activatedRoute, queryParams: qParams, queryParamsHandling: 'merge' });
	} else {
	this.router.navigate([], { relativeTo: this.activatedRoute, queryParams: qParams, queryParamsHandling: 'merge' });
	}
	}
	}