52 lines
1.5 KiB
TypeScript
52 lines
1.5 KiB
TypeScript
// #docplaster
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// #docregion
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// Promise Version
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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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@Injectable()
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export class HeroService {
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constructor (private http: Http) {}
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// URL to web api
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private heroesUrl = 'app/heroes.json';
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// #docregion methods
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getHeroes (): Promise<Hero[]> {
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return this.http.get(this.heroesUrl)
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.toPromise()
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.then(this.extractData)
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.catch(this.handleError);
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}
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addHero (name: string): Promise<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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.toPromise()
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.then(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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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 use a remote logging infrastructure
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// We'd also dig deeper into the error to get a better message
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let errMsg = (error.message) ? error.message :
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error.status ? `${error.status} - ${error.statusText}` : 'Server error';
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console.error(errMsg); // log to console instead
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return Promise.reject(errMsg);
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}
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// #enddocregion methods
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}
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// #enddocregion
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