19 lines
438 B
TypeScript
19 lines
438 B
TypeScript
import {Injectable} from '@angular/core';
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import {Observable} from 'rxjs';
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import {SongService} from './song.service';
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import {Song} from './song';
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import {filter} from 'rxjs/operators';
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@Injectable({
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providedIn: 'root',
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})
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export class SongListResolver {
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public constructor(private songService: SongService) {
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}
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public resolve(): Observable<Song[]> {
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return this.songService.list$().pipe(filter(_ => _.length > 0));
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}
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}
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