47 lines
1.5 KiB
TypeScript
47 lines
1.5 KiB
TypeScript
// #docplaster
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// #docregion
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import { Injectable } from '@angular/core';
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import { Http, Response } from '@angular/http';
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import { Headers, RequestOptions } from '@angular/http';
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import { Hero } from './hero';
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import { Observable } from 'rxjs/Observable';
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@Injectable()
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export class HeroService {
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private _heroesUrl = 'app/heroes'; // URL to web api
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constructor (private http: Http) {}
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getHeroes (): Observable<Hero[]> {
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return this.http.get(this._heroesUrl)
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.map(this.extractData)
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// .do(data => console.log(data)) // eyeball results in the console
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.catch(this.handleError);
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}
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addHero (name: string): Observable<Hero> {
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let body = JSON.stringify({ name });
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let headers = new Headers({ 'Content-Type': 'application/json' });
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let options = new RequestOptions({ headers: headers });
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return this.http.post(this._heroesUrl, body, options)
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.map(this.extractData)
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.catch(this.handleError);
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}
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private extractData(res: Response) {
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if (res.status < 200 || res.status >= 300) {
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throw new Error('Bad response status: ' + res.status);
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}
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let body = res.json();
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return body.data || { };
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}
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private handleError (error: any) {
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// In a real world app, we might send the error to remote logging infrastructure
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let errMsg = error.message || 'Server error';
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console.error(errMsg); // log to console instead
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return Observable.throw(errMsg);
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}
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}
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