907f848c95
* docs(toh-6/dart): refactoring of 'add, edit, delete heroes' Refactoring of "add, edit, delete heroes" section of toh-6 from one big bottom-up step into small independent feature slices, where the user achieves a "milesone" (i.e., can run the full app) after each feature section. The section rewrite is shorter and offers a better UX. Other simplifications: - Error handling is consistent: in the hero service we log to the console, everwhere else we just let errors bubble up. - Hero service methods renamed based on function (create, update) rather then lower-level implementation (post, put). - @Output properties have been eliminated (since they weren't explained). E2E tests now pass on both the TS and Dart sides. * docs(toh-6/ts): refactoring of 'add, edit, delete heroes' Refactoring of "add, edit, delete heroes" section of toh-6 from one big bottom-up step into small independent feature slices, where the user achieves a "milesone" (i.e., can run the full app) after each feature section. The section rewrite is shorter and offers a better UX. Other simplifications: - Error handling is consistent: in the hero service we log to the console, everwhere else we just let errors bubble up. - Hero service methods renamed based on function (create, update) rather then lower-level implementation (post, put). - @Output properties have been eliminated (since they weren't explained). E2E tests now pass on both the TS and Dart sides. Post-Dart-review updates included. * docs(toh-6): ward tweaks
82 lines
2.1 KiB
TypeScript
82 lines
2.1 KiB
TypeScript
// #docplaster
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// #docregion , imports
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import { Injectable } from '@angular/core';
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import { Headers, Http } from '@angular/http';
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// #docregion rxjs
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import 'rxjs/add/operator/toPromise';
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// #enddocregion rxjs
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import { Hero } from './hero';
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// #enddocregion imports
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@Injectable()
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export class HeroService {
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// #docregion update
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private headers = new Headers({'Content-Type': 'application/json'});
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// #enddocregion update
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// #docregion getHeroes
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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(): Promise<Hero[]> {
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return this.http.get(this.heroesUrl)
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// #docregion to-promise
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.toPromise()
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// #enddocregion to-promise
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// #docregion to-data
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.then(response => response.json().data as Hero[])
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// #enddocregion to-data
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// #docregion catch
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.catch(this.handleError);
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// #enddocregion catch
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}
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// #enddocregion getHeroes
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getHero(id: number): Promise<Hero> {
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return this.getHeroes()
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.then(heroes => heroes.find(hero => hero.id === id));
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}
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// #docregion delete
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delete(id: number): Promise<void> {
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let url = `${this.heroesUrl}/${id}`;
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return this.http.delete(url, {headers: this.headers})
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.toPromise()
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.then(() => null)
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.catch(this.handleError);
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}
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// #enddocregion delete
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// #docregion create
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create(name: string): Promise<Hero> {
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return this.http
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.post(this.heroesUrl, JSON.stringify({name: name}), {headers: this.headers})
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.toPromise()
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.then(res => res.json().data)
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.catch(this.handleError);
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}
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// #enddocregion create
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// #docregion update
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update(hero: Hero): Promise<Hero> {
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const url = `${this.heroesUrl}/${hero.id}`;
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return this.http
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.put(url, JSON.stringify(hero), {headers: this.headers})
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.toPromise()
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.then(() => hero)
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.catch(this.handleError);
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}
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// #enddocregion put, update
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// #docregion handleError
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private handleError(error: any): Promise<any> {
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console.error('An error occurred', error); // for demo purposes only
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return Promise.reject(error.message || error);
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}
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// #enddocregion handleError
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}
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