58 lines
1.7 KiB
TypeScript
58 lines
1.7 KiB
TypeScript
// #docplaster
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// #docregion
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import { Component, OnInit } from '@angular/core';
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import { Router } from '@angular/router';
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import { Observable } from 'rxjs/Observable';
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import { Subject } from 'rxjs/Subject';
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import { HeroSearchService } from './hero-search.service';
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import { Hero } from './hero';
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@Component({
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selector: 'hero-search',
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templateUrl: 'app/hero-search.component.html',
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providers: [HeroSearchService]
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})
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export class HeroSearchComponent implements OnInit {
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// #docregion search
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heroes: Observable<Hero[]>;
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// #enddocregion search
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// #docregion searchSubject
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searchSubject = new Subject<string>();
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// #enddocregion searchSubject
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constructor(
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private heroSearchService: HeroSearchService,
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private router: Router) {}
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// #docregion searchSubject
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// Push a search term into the observable stream.
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search(term: string) { this.searchSubject.next(term); }
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// #enddocregion searchSubject
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// #docregion search
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ngOnInit() {
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this.heroes = this.searchSubject
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.asObservable() // cast as Observable
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.debounceTime(300) // wait for 300ms pause in events
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.distinctUntilChanged() // ignore if next search term is same as previous
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.switchMap(term => term // switch to new observable each time
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// return the http search observable
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? this.heroSearchService.search(term)
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// or the observable of empty heroes if no search term
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: Observable.of<Hero[]>([]))
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.catch(error => {
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// Todo: real error handling
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console.log(error);
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return Observable.of<Hero[]>([]);
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});
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}
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// #enddocregion search
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gotoDetail(hero: Hero) {
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let link = ['/detail', hero.id];
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this.router.navigate(link);
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}
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}
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