PizzaService example for a service using the HttpClient

pizza.service.ts

export class PizzaService {

private url='http://pizzaService';
private endpoint = 'pizzas';

  constructor(
    protected httpClient: HttpClient) {}

  public create(pizza: Pizza): Observable<Pizza> {
    return this.httpClient
      .post<Pizza>(`${this.url}/${this.endpoint}`, pizza);
  }

  public update(pizza: Pizza): Observable<Pizza> {
    return this.httpClient
      .put<Pizza>(`${this.url}/${this.endpoint}/${pizza.id}`, pizza);
  }

  read(id: number): Observable<Pizza> {
    return this.httpClient
      .get<Pizza>(`${this.url}/${this.endpoint}/${id}`);
  }

  list(): Observable<Pizza[]> {
    return this.httpClient
      .get<Pizza[]>(`${this.url}/${this.endpoint}`);
  }

  delete(id: number) {
    return this.httpClient
      .delete(`${this.url}/${this.endpoint}/${id}`);
  }
}