21 lines
444 B
TypeScript
21 lines
444 B
TypeScript
// #docregion
|
|
import { Injectable } from '@angular/core';
|
|
|
|
import { Hero } from './hero';
|
|
import { HeroService } from './hero.service';
|
|
|
|
// #docregion service
|
|
@Injectable()
|
|
export class HeroCacheService {
|
|
hero: Hero;
|
|
constructor(private heroService: HeroService) {}
|
|
|
|
fetchCachedHero(id: number) {
|
|
if (!this.hero) {
|
|
this.hero = this.heroService.getHeroById(id);
|
|
}
|
|
return this.hero;
|
|
}
|
|
}
|
|
// #enddocregion service
|