brewman/overlord/src/app/role/role-resolver.service.ts

import {Injectable} from '@angular/core';
import {ActivatedRouteSnapshot, Resolve, Router, RouterStateSnapshot} from '@angular/router';
import {Role} from './role';
import {Observable} from 'rxjs/internal/Observable';
import {RoleService} from './role.service';

@Injectable({
  providedIn: 'root'
})
export class RoleResolver implements Resolve<Role> {

  constructor(private ser: RoleService, private router: Router) {
  }

  resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<Role> {
    const id = route.paramMap.get('id');
    return this.ser.get(id);
  }
}