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import { Http, Response } from '@angular/http';
import { Observable } from 'rxjs/Observable';


getUsers(): Observable<User[]>{
  return this.http.get('http://reqres.in/api/users')
    .map(res => res.json().data)
    .catch(this.handleError)
}

private handleError(err){
  let errMessage: string;
  
  if(err instanceof Response) {
    let body = err.json() || '';
    let error = body.error || JSON.stringify(body);
    errMessage = `${err.status} - ${err.statusText} || ''}  ${error}`;
  }else {
    errMessage = err.message ? err.message
  }
  
  return Observable.throw(errMessage);
}