latest fixes

src/app/navbar/navbar.effects.ts

@@ -1,11 +1,17 @@
-import { map } from 'rxjs/operators';
+import { first, map, switchMap } from 'rxjs/operators';
 import { Injectable } from '@angular/core';
 import { Actions, Effect, ofType } from '@ngrx/effects'
 import * as fromRouter from '@ngrx/router-store';
 
 import { HostWindowActionTypes } from '../shared/host-window.actions';
-import { CollapseMenuAction } from '../shared/menu/menu.actions';
+import {
+  CollapseMenuAction,
+  ExpandMenuPreviewAction,
+  MenuActionTypes
+} from '../shared/menu/menu.actions';
 import { MenuID } from '../shared/menu/initial-menus-state';
+import { MenuService } from '../shared/menu/menu.service';
+import { MenuState } from '../shared/menu/menu.reducer';
 
 @Injectable()
 export class NavbarEffects {
@@ -29,8 +35,27 @@ export class NavbarEffects {
       ofType(fromRouter.ROUTER_NAVIGATION),
       map(() => new CollapseMenuAction(this.menuID))
     );
-
-  constructor(private actions$: Actions) {
+  /**
+   * Effect that collapses the public menu when the admin sidebar opens
+   * @type {Observable<CollapseMenuAction>}
+   */
+  @Effect() openAdminSidebar$ = this.actions$
+    .pipe(
+      ofType(MenuActionTypes.EXPAND_MENU_PREVIEW),
+      switchMap((action: ExpandMenuPreviewAction) => {
+        return this.menuService.getMenu(action.menuID).pipe(
+          first(),
+          map((menu: MenuState) => {
+            if (menu.id === MenuID.ADMIN) {
+              if (!menu.previewCollapsed && menu.collapsed) {
+                return new CollapseMenuAction(MenuID.PUBLIC)
+              }
+            }
+            return { type: 'NO_ACTION' };
+          }));
+      })
+    );
+  constructor(private actions$: Actions, private menuService: MenuService) {
 
   }