SuZhou-Joe
diff --git a/‎src/core/public/chrome/chrome_service.mock.ts
+2 b/‎src/core/public/chrome/chrome_service.mock.ts
+2
diff --git a/‎src/core/public/chrome/chrome_service.tsx
+3-45 b/‎src/core/public/chrome/chrome_service.tsx
+3-45
diff --git a/‎src/core/public/chrome/constants.ts
-6 b/‎src/core/public/chrome/constants.ts
-6
diff --git a/‎src/core/public/chrome/nav_links/nav_link.ts
+5 b/‎src/core/public/chrome/nav_links/nav_link.ts
+5
diff --git a/‎src/core/public/chrome/nav_links/nav_links_service.ts
+26 b/‎src/core/public/chrome/nav_links/nav_links_service.ts
+26
@@ -37,6 +37,8 @@ const createStartContractMock = () => {
     getHeaderComponent: jest.fn(),
     navLinks: {
       getNavLinks$: jest.fn(),
+      getFilteredNavLinks$: jest.fn(),
+      setFilteredNavLinks: jest.fn(),
       has: jest.fn(),
       get: jest.fn(),
       getAll: jest.fn(),
 
@@ -35,22 +35,21 @@ import { BehaviorSubject, combineLatest, merge, Observable, of, ReplaySubject }
 import { flatMap, map, takeUntil } from 'rxjs/operators';
 import { parse } from 'url';
 import { EuiLink } from '@elastic/eui';
-import { i18n } from '@osd/i18n';
 import { mountReactNode } from '../utils/mount';
 import { InternalApplicationStart } from '../application';
 import { DocLinksStart } from '../doc_links';
 import { HttpStart } from '../http';
 import { InjectedMetadataStart } from '../injected_metadata';
 import { NotificationsStart } from '../notifications';
 import { IUiSettingsClient } from '../ui_settings';
-import { OPENSEARCH_DASHBOARDS_ASK_OPENSEARCH_LINK, WORKSPACE_APP_ID } from './constants';
+import { OPENSEARCH_DASHBOARDS_ASK_OPENSEARCH_LINK } from './constants';
 import { ChromeDocTitle, DocTitleService } from './doc_title';
 import { ChromeNavControls, NavControlsService } from './nav_controls';
 import { ChromeNavLinks, NavLinksService, ChromeNavLink } from './nav_links';
 import { ChromeRecentlyAccessed, RecentlyAccessedService } from './recently_accessed';
 import { Header } from './ui';
 import { ChromeHelpExtensionMenuLink } from './ui/header/header_help_menu';
-import { Branding, WorkspacesStart } from '../';
+import { Branding } from '../';
 export { ChromeNavControls, ChromeRecentlyAccessed, ChromeDocTitle };
 
 const IS_LOCKED_KEY = 'core.chrome.isLocked';
@@ -101,7 +100,6 @@ interface StartDeps {
   injectedMetadata: InjectedMetadataStart;
   notifications: NotificationsStart;
   uiSettings: IUiSettingsClient;
-  workspaces: WorkspacesStart;
 }
 
 /** @internal */
@@ -155,7 +153,6 @@ export class ChromeService {
     injectedMetadata,
     notifications,
     uiSettings,
-    workspaces,
   }: StartDeps): Promise<InternalChromeStart> {
     this.initVisibility(application);
 
@@ -182,41 +179,6 @@ export class ChromeService {
       docTitle.reset();
     });
 
-    const getWorkspaceUrl = (id: string) => {
-      return workspaces.formatUrlWithWorkspaceId(
-        application.getUrlForApp(WORKSPACE_APP_ID, {
-          path: '/',
-          absolute: true,
-        }),
-        id
-      );
-    };
-
-    const exitWorkspace = async () => {
-      let result;
-      try {
-        result = await workspaces.client.exitWorkspace();
-      } catch (error) {
-        notifications?.toasts.addDanger({
-          title: i18n.translate('workspace.exit.failed', {
-            defaultMessage: 'Failed to exit workspace',
-          }),
-          text: error instanceof Error ? error.message : JSON.stringify(error),
-        });
-        return;
-      }
-      if (!result?.success) {
-        notifications?.toasts.addDanger({
-          title: i18n.translate('workspace.exit.failed', {
-            defaultMessage: 'Failed to exit workspace',
-          }),
-          text: result?.error,
-        });
-        return;
-      }
-      await application.navigateToApp('home');
-    };
-
     const setIsNavDrawerLocked = (isLocked: boolean) => {
       isNavDrawerLocked$.next(isLocked);
       localStorage.setItem(IS_LOCKED_KEY, `${isLocked}`);
@@ -289,7 +251,7 @@ export class ChromeService {
           homeHref={http.basePath.prepend('/app/home')}
           isVisible$={this.isVisible$}
           opensearchDashboardsVersion={injectedMetadata.getOpenSearchDashboardsVersion()}
-          navLinks$={navLinks.getNavLinks$()}
+          navLinks$={navLinks.getFilteredNavLinks$()}
           customNavLink$={customNavLink$.pipe(takeUntil(this.stop$))}
           recentlyAccessed$={recentlyAccessed.get$()}
           navControlsLeft$={navControls.getLeft$()}
@@ -298,13 +260,9 @@ export class ChromeService {
           navControlsExpandedCenter$={navControls.getExpandedCenter$()}
           navControlsExpandedRight$={navControls.getExpandedRight$()}
           onIsLockedUpdate={setIsNavDrawerLocked}
-          exitWorkspace={exitWorkspace}
-          getWorkspaceUrl={getWorkspaceUrl}
           isLocked$={getIsNavDrawerLocked$}
           branding={injectedMetadata.getBranding()}
           survey={injectedMetadata.getSurvey()}
-          currentWorkspace$={workspaces.client.currentWorkspace$}
-          workspaceList$={workspaces.client.workspaceList$}
         />
       ),
 
 
@@ -31,9 +31,3 @@
 export const OPENSEARCH_DASHBOARDS_ASK_OPENSEARCH_LINK = 'https://forum.opensearch.org/';
 export const GITHUB_CREATE_ISSUE_LINK =
   'https://github.com/opensearch-project/OpenSearch-Dashboards/issues/new/choose';
-
-export const WORKSPACE_APP_ID = 'workspace';
-
-export const PATHS = {
-  list: '/list',
-};
@@ -102,6 +102,11 @@ export interface ChromeNavLink {
    * Hides a link from the navigation.
    */
   readonly hidden?: boolean;
+
+  /**
+   * Links can be navigated through url.
+   */
+  readonly externalLink?: boolean;
 }
 
 /** @public */
 
@@ -53,6 +53,16 @@ export interface ChromeNavLinks {
    */
   getNavLinks$(): Observable<Array<Readonly<ChromeNavLink>>>;
 
+  /**
+   * Set an observable for a sorted list of filtered navlinks.
+   */
+  getFilteredNavLinks$(): Observable<Array<Readonly<ChromeNavLink>>>;
+
+  /**
+   * Set filtered navlinks.
+   */
+  setFilteredNavLinks(filteredNavLinks: ReadonlyMap<string, ChromeNavLink>): void;
+
   /**
    * Get the state of a navlink at this point in time.
    * @param id
@@ -116,6 +126,7 @@ type LinksUpdater = (navLinks: Map<string, NavLinkWrapper>) => Map<string, NavLi
 
 export class NavLinksService {
   private readonly stop$ = new ReplaySubject(1);
+  private filteredNavLinks$ = new BehaviorSubject<ReadonlyMap<string, ChromeNavLink>>(new Map());
 
   public start({ application, http }: StartDeps): ChromeNavLinks {
     const appLinks$ = application.applications$.pipe(
@@ -151,6 +162,14 @@ export class NavLinksService {
         return navLinks$.pipe(map(sortNavLinks), takeUntil(this.stop$));
       },
 
+      setFilteredNavLinks: (filteredNavLinks: ReadonlyMap<string, ChromeNavLink>) => {
+        this.filteredNavLinks$.next(filteredNavLinks);
+      },
+
+      getFilteredNavLinks$: () => {
+        return this.filteredNavLinks$.pipe(map(sortChromeNavLinks), takeUntil(this.stop$));
+      },
+
       get(id: string) {
         const link = navLinks$.value.get(id);
         return link && link.properties;
@@ -215,3 +234,10 @@ function sortNavLinks(navLinks: ReadonlyMap<string, NavLinkWrapper>) {
     'order'
   );
 }
+
+function sortChromeNavLinks(chromeNavLinks: ReadonlyMap<string, ChromeNavLink>) {
+  return sortBy(
+    [...chromeNavLinks.values()].map((link) => link as Readonly<ChromeNavLink>),
+    'order'
+  );
+}