delete file button

src/app/modules/songs/services/file.service.ts

@@ -0,0 +1,27 @@
+import {Injectable} from '@angular/core';
+import {AngularFireStorage} from '@angular/fire/storage';
+import {Observable} from 'rxjs';
+import {FileDataService} from './file-data.service';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class FileService {
+
+  constructor(
+    private storage: AngularFireStorage,
+    private fileDataService: FileDataService
+  ) {
+  }
+
+  public getDownloadUrl(path: string): Observable<string> {
+    const ref = this.storage.ref(path);
+    return ref.getDownloadURL();
+  }
+
+  public async delete(path: string, songId: string, fileId: string) {
+    const ref = this.storage.ref(path);
+    await ref.delete().toPromise()
+    await this.fileDataService.delete(songId, fileId);
+  }
+}