save current show in global store

src/app/services/global-settings.service.spec.ts

@@ -0,0 +1,16 @@
+import {TestBed} from '@angular/core/testing';
+
+import {GlobalSettingsService} from './global-settings.service';
+
+describe('GlobalSettingsService', () => {
+  let service: GlobalSettingsService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(GlobalSettingsService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

src/app/services/global-settings.service.ts

@@ -0,0 +1,21 @@
+import {Injectable} from '@angular/core';
+import {DbService} from './db.service';
+import {GlobalSettings} from './global-settings';
+import {Observable} from 'rxjs';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class GlobalSettingsService {
+  constructor(private db: DbService) {
+  }
+
+  public get get$(): Observable<GlobalSettings> {
+    return this.db.doc$<GlobalSettings>('global/static');
+  }
+
+  public async set(data: Partial<GlobalSettings>) {
+    await this.db.doc<GlobalSettings>('global/static').update(data);
+  }
+
+}

src/app/services/global-settings.ts

@@ -0,0 +1,3 @@
+export interface GlobalSettings {
+  currentShow: string
+}