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

@Injectable()
export class HeaderDataService {

  constructor(private http: Http) {}

  loadData(): Observable<any> {
    return this.http
        .get('assets/mock-data/header-data.json')
        .map((res: Response) => res.json())
        .catch(this.handleError);
  }

  private handleError (error: any) {
    let errMsg = (error.message) ? error.message :
      error.status ? `${error.status} - ${error.statusText}` : 'Server error';
    console.error(errMsg); // log to console instead
    return Observable.throw(errMsg);
  }
}