Created
February 28, 2021 02:09
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| import { ɵɵdirectiveInject as directiveInject } from '@angular/core'; | |
| export class ArticleComponent { | |
| article$: Observable<Article>; | |
| constructor(route: ActivatedRoute, transferState: TransferState) { | |
| if (isPlatformServer(directiveInject(PLATFORM_ID))) { | |
| const meta = directiveInject(Meta); | |
| const http = directiveInject(HttpClient); | |
| this.article$ = route.params.pipe( | |
| switchMap(params => | |
| http.get<Article>(`${environment.apiUrl}/api/article/${params.id}`), | |
| ), | |
| tap(article => { | |
| meta.addTags([ | |
| { | |
| property: 'og:type', | |
| content: 'article', | |
| }, | |
| { | |
| property: 'og:title', | |
| content: article.title, | |
| }, | |
| { | |
| property: 'og:url', | |
| content: article.url, | |
| }, | |
| { | |
| property: 'og:image', | |
| content: article.image, | |
| }, | |
| ]); | |
| const key = makeStateKey<Article>(`article:${article.id}`); | |
| transferState.set(key, article); | |
| }), | |
| ); | |
| } else { | |
| this.article$ = route.params.pipe( | |
| map(params => { | |
| const key = makeStateKey<Article>(`article:${params.id}`); | |
| const article = transferState.get(key, null!); | |
| return article; | |
| }), | |
| ); | |
| } | |
| } | |
| } |
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