search function for show editing

src/app/services/filter.helper.ts

@@ -0,0 +1,16 @@
+import {Song} from '../modules/songs/services/song';
+
+export function filterSong(song: Song, filterValue: string): boolean {
+  if (!filterValue) {
+    return true;
+  }
+
+  const textMatch = song.text && normalize(song.text).indexOf(normalize(filterValue)) !== -1;
+  const titleMatch = song.title && normalize(song.title).indexOf(normalize(filterValue)) !== -1;
+
+  return textMatch || titleMatch;
+}
+
+function normalize(input: string): string {
+  return input.toLowerCase().replace(/\s/g, '');
+}

src/app/services/user.service.ts

@@ -22,6 +22,10 @@ export class UserService {
     return this._user$.pipe(filter(_ => !!_));
   }
 
+  public getUserbyId$(userId: string): Observable<User> {
+    return this.db.doc$<User>('user/' + userId);
+  }
+
   public async update$(uid: string, data: Partial<User>): Promise<void> {
     await this.db.doc<User>('user/' + uid).update(data);
   }