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

import { Injectable } from '@angular/core';
import { ActivatedRouteSnapshot, Resolve, Router } from '@angular/router';
import { Observable } from 'rxjs/internal/Observable';

import { Product } from '../core/product';

import { ProductService } from './product.service';

@Injectable({
  providedIn: 'root',
})
export class ProductResolver implements Resolve<Product> {
  constructor(private ser: ProductService, private router: Router) {}

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