Basisimplementierung Songlist

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

@@ -0,0 +1,20 @@
+import {Injectable} from '@angular/core';
+import {AngularFirestore, AngularFirestoreCollection} from "@angular/fire/firestore";
+import {Song} from "../models/song";
+import {Observable} from "rxjs";
+
+@Injectable({
+  providedIn: 'root'
+})
+export class SongDataService {
+  private songCollection: AngularFirestoreCollection<Song>;
+  private songs: Observable<Song[]>;
+
+  constructor(private afs: AngularFirestore) {
+    this.songCollection = afs.collection<Song>('songs');
+    this.songs = this.songCollection.valueChanges();
+  }
+
+  public list = (): Observable<Song[]> => this.songs;
+
+}