Basisimplementierung Songlist

src/app/songs/services/song.service.ts

@@ -0,0 +1,16 @@
+import {Injectable} from '@angular/core';
+import {Observable} from "rxjs";
+import {Song} from "../models/song";
+import {SongDataService} from "./song-data.service";
+
+@Injectable({
+  providedIn: 'root'
+})
+export class SongService {
+
+  constructor(private songDataService: SongDataService) {
+  }
+
+  public list = (): Observable<Song[]> => this.songDataService.list();
+
+}