show user in show

restrict show actions

src/app/services/user/user-name/user-name.component.html

@@ -0,0 +1 @@
+{{name$|async}}

src/app/services/user/user-name/user-name.component.spec.ts

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+import {async, ComponentFixture, TestBed} from '@angular/core/testing';
+
+import {UserNameComponent} from './user-name.component';
+
+describe('UserNameComponent', () => {
+  let component: UserNameComponent;
+  let fixture: ComponentFixture<UserNameComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [UserNameComponent]
+    })
+      .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(UserNameComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/services/user/user-name/user-name.component.ts

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+import {Component, Input} from '@angular/core';
+import {UserService} from '../user.service';
+import {map} from 'rxjs/operators';
+import {Observable} from 'rxjs';
+
+@Component({
+  selector: 'app-user-name',
+  templateUrl: './user-name.component.html',
+  styleUrls: ['./user-name.component.less']
+})
+export class UserNameComponent {
+  public name$: Observable<string>;
+
+  constructor(
+    private userService: UserService
+  ) {
+  }
+
+  @Input() set userId(id: string) {
+    this.name$ = this.userService.getUserbyId$(id).pipe(map(_ => _.name));
+  }
+
+}

src/app/services/user/user-name/user-name.module.ts

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+import {NgModule} from '@angular/core';
+import {CommonModule} from '@angular/common';
+import {UserNameComponent} from './user-name.component';
+
+@NgModule({
+  declarations: [UserNameComponent],
+  exports: [UserNameComponent],
+  imports: [CommonModule]
+})
+export class UserNameModule {
+}