Added first release of the authentication module

src/app/shared/auth-nav-menu/auth-nav-menu.component.ts

@@ -0,0 +1,61 @@
+
+import { Component, OnDestroy, OnInit } from '@angular/core';
+import { Observable } from 'rxjs/Observable';
+import { RouterReducerState } from '@ngrx/router-store';
+import { Store } from '@ngrx/store';
+
+import { fadeInOut, fadeOut } from '../animations/fade';
+import { CoreState } from '../../core/core.reducers';
+import { HostWindowService } from '../host-window.service';
+import { AppState } from '../../app.reducer';
+import { hasValue, isNotUndefined } from '../empty.util';
+import { getAuthenticatedUser, isAuthenticated } from '../../core/auth/selectors';
+import { Subscription } from 'rxjs/Subscription';
+import { Eperson } from '../../core/eperson/models/eperson.model';
+
+const routerStateSelector = (state: AppState) => state.router;
+
+@Component({
+  selector: 'ds-auth-nav-menu',
+  templateUrl: './auth-nav-menu.component.html',
+  styleUrls: ['./auth-nav-menu.component.scss'],
+  animations: [fadeInOut, fadeOut]
+})
+export class AuthNavMenuComponent implements OnDestroy, OnInit {
+  /**
+   * Whether user is authenticated.
+   * @type {Observable<string>}
+   */
+  public isAuthenticated: Observable<boolean>;
+
+  public showAuth = false;
+
+  public user: Observable<Eperson>;
+
+  protected subs: Subscription[] = [];
+
+  constructor(
+    private appStore: Store<AppState>,
+    private coreStore: Store<CoreState>,
+    private windowService: HostWindowService) {
+  }
+
+  ngOnInit(): void {
+    // set loading
+    this.isAuthenticated = this.coreStore.select(isAuthenticated);
+
+    this.user = this.appStore.select(getAuthenticatedUser);
+
+    this.subs.push(this.appStore.select(routerStateSelector)
+      .filter((router: RouterReducerState) => isNotUndefined(router))
+      .subscribe((router: RouterReducerState) => {
+        this.showAuth = router.state.url !== '/login';
+      }));
+  }
+
+  ngOnDestroy() {
+    this.subs
+      .filter((sub) => hasValue(sub))
+      .forEach((sub) => sub.unsubscribe());
+  }
+}