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import {
ChangeDetectionStrategy,
Component,
EventEmitter,
Output,
inject,
input,
} from '@angular/core'
import { QueryClient, injectQuery } from '@tanstack/angular-query-experimental'
import { fromEvent, lastValueFrom, takeUntil } from 'rxjs'
import { PostsService } from '../services/posts-service'
@Component({
changeDetection: ChangeDetectionStrategy.OnPush,
selector: 'post',
standalone: true,
templateUrl: './post.component.html',
})
export class PostComponent {
#postsService = inject(PostsService)
@Output() setPostId = new EventEmitter<number>()
postId = input(0)
postQuery = injectQuery(() => ({
enabled: this.postId() > 0,
queryKey: ['post', this.postId()],
queryFn: async (context) => {
// Cancels the request when component is destroyed before the request finishes
const abort$ = fromEvent(context.signal, 'abort')
return lastValueFrom(
this.#postsService.postById$(this.postId()).pipe(takeUntil(abort$)),
)
},
}))
queryClient = inject(QueryClient)
}
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