D-Net

import { Injectable } from '@angular/core';

import {ActivatedRoute, Router,CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot} from '@angular/router';

import {Observable}       from 'rxjs/Observable';

import 'rxjs/add/operator/filter';

@Injectable()

export class IsCommunity implements CanActivate {

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

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | boolean {

      let community = (route.queryParams["communityId"]);

        if(community && community!="undefined"){

        return true;

      }else{

        this.router.navigate(['errorcommunity']);

      }

      return false;

    }

  }