add song to show

src/app/modules/shows/services/show-song-data.service.ts

@@ -0,0 +1,20 @@
+import {Injectable} from '@angular/core';
+import {DbService} from '../../../services/db.service';
+import {Observable} from 'rxjs';
+import {ShowSong} from './showSong';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ShowSongDataService {
+  private collection = 'shows';
+  private subCollection = 'songs';
+
+  constructor(private dbService: DbService) {
+  }
+
+  public list$ = (showId: string): Observable<ShowSong[]> => this.dbService.col$(`${this.collection}/${showId}/${this.subCollection}`);
+  public read$ = (showId: string, songId: string): Observable<ShowSong | undefined> => this.dbService.doc$(`${this.collection}/${showId}/${this.subCollection}/${songId}`);
+  public update = async (showId: string, songId: string, data: Partial<ShowSong>): Promise<void> => await this.dbService.doc(`${this.collection}/${showId}/${this.subCollection}/${songId}`).update(data);
+  public add = async (showId: string, data: Partial<ShowSong>): Promise<string> => (await this.dbService.col(`${this.collection}/${showId}/${this.subCollection}`).add(data)).id
+}