[Enterprise Search] Move externalUrl helper out of React Context (ela…

…stic#78368) (elastic#78497)

* Add new/simpler externalUrl helper and initialize it on renderApp

- This uses a simple JS obj to store the enterpriseSearchUrl reference (once on plugin init)
  - This is vs. a class, which needs to be instantiated and passed around - the new obj can be imported flatly at any time
  - I also opted to not convert this into a Kea logic file - after some deliberation I decided against it because it felt really weird as one. It's not storing "state" per se that ever needs to be updated, it's simply a one-time set obj that contains helper functions.
  - There's also some hope that we might eventually not need this helper after the full migration, so the simpler it is to delete the better
- Uses a getter & setter to ensure that we don't accidentally mutate said obj after initialization

* Update all components using get*SearchUrl helpers

* Update tests for updated components

- Mostly just consists of mocking externalUrl and importing that mock

* Remove old ExternalUrl class/context

TODO in next commit: Address kibana_header_actions

* Update Workplace Search Header Actions to use new externalUrl helper

NOTE: this requires a temporary workaround of initializing externalUrl.enterpriseSearch in plugin.ts rather than in renderApp, because renderApp loads *after* the header app does.

I plan on fixing this in a future PR so that setHeaderActionMenu is called AFTER renderApp has done loading (to ensure all the state in headerActions we need is available).

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

x-pack/plugins/enterprise_search/public/applications/__mocks__/enterprise_search_url.mock.ts

@@ -0,0 +1,9 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { externalUrl } from '../shared/enterprise_search_url';
+
+externalUrl.enterpriseSearchUrl = 'http://localhost:3002';

x-pack/plugins/enterprise_search/public/applications/__mocks__/kibana_context.mock.ts

@@ -4,8 +4,6 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import { ExternalUrl } from '../shared/enterprise_search_url';
-
 /**
  * A set of default Kibana context values to use across component tests.
  * @see enterprise_search/public/index.tsx for the KibanaContext definition/import
@@ -15,5 +13,4 @@ export const mockKibanaContext = {
   setBreadcrumbs: jest.fn(),
   setDocTitle: jest.fn(),
   config: { host: 'http://localhost:3002' },
-  externalUrl: new ExternalUrl('http://localhost:3002'),
 };

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview/components/empty_state.test.tsx

@@ -5,7 +5,6 @@
  */
 
 import '../../../../__mocks__/kea.mock';
-import '../../../../__mocks__/shallow_usecontext.mock';
 
 import React from 'react';
 import { shallow } from 'enzyme';

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview/components/empty_state.tsx

@@ -4,15 +4,15 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import React, { useContext } from 'react';
+import React from 'react';
 import { useValues } from 'kea';
 import { EuiPageContent, EuiEmptyPrompt, EuiButton } from '@elastic/eui';
 import { FormattedMessage } from '@kbn/i18n/react';
 
 import { sendTelemetry } from '../../../../shared/telemetry';
 import { HttpLogic } from '../../../../shared/http';
+import { getAppSearchUrl } from '../../../../shared/enterprise_search_url';
 import { SetAppSearchChrome as SetPageChrome } from '../../../../shared/kibana_chrome';
-import { KibanaContext, IKibanaContext } from '../../../../index';
 import { CREATE_ENGINES_PATH } from '../../../routes';
 
 import { EngineOverviewHeader } from './header';
@@ -21,9 +21,6 @@ import './empty_state.scss';
 
 export const EmptyState: React.FC = () => {
   const { http } = useValues(HttpLogic);
-  const {
-    externalUrl: { getAppSearchUrl },
-  } = useContext(KibanaContext) as IKibanaContext;
 
   const buttonProps = {
     href: getAppSearchUrl(CREATE_ENGINES_PATH),

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview/components/header.test.tsx

@@ -5,7 +5,7 @@
  */
 
 import '../../../../__mocks__/kea.mock';
-import '../../../../__mocks__/shallow_usecontext.mock';
+import '../../../../__mocks__/enterprise_search_url.mock';
 
 import React from 'react';
 import { shallow } from 'enzyme';

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview/components/header.tsx

@@ -4,7 +4,7 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import React, { useContext } from 'react';
+import React from 'react';
 import { useValues } from 'kea';
 import {
   EuiPageHeader,
@@ -18,13 +18,10 @@ import { FormattedMessage } from '@kbn/i18n/react';
 
 import { sendTelemetry } from '../../../../shared/telemetry';
 import { HttpLogic } from '../../../../shared/http';
-import { KibanaContext, IKibanaContext } from '../../../../index';
+import { getAppSearchUrl } from '../../../../shared/enterprise_search_url';
 
 export const EngineOverviewHeader: React.FC = () => {
   const { http } = useValues(HttpLogic);
-  const {
-    externalUrl: { getAppSearchUrl },
-  } = useContext(KibanaContext) as IKibanaContext;
 
   const buttonProps = {
     fill: true,

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview/engine_table.test.tsx

@@ -5,7 +5,7 @@
  */
 
 import '../../../__mocks__/kea.mock';
-import '../../../__mocks__/shallow_usecontext.mock';
+import '../../../__mocks__/enterprise_search_url.mock';
 import { mockHttpValues } from '../../../__mocks__/';
 
 import React from 'react';

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview/engine_table.tsx

@@ -4,15 +4,15 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import React, { useContext } from 'react';
+import React from 'react';
 import { useValues } from 'kea';
 import { EuiBasicTable, EuiBasicTableColumn, EuiLink } from '@elastic/eui';
 import { FormattedMessage, FormattedDate, FormattedNumber } from '@kbn/i18n/react';
 import { i18n } from '@kbn/i18n';
 
 import { sendTelemetry } from '../../../shared/telemetry';
 import { HttpLogic } from '../../../shared/http';
-import { KibanaContext, IKibanaContext } from '../../../index';
+import { getAppSearchUrl } from '../../../shared/enterprise_search_url';
 import { getEngineRoute } from '../../routes';
 
 import { ENGINES_PAGE_SIZE } from '../../../../../common/constants';
@@ -43,9 +43,6 @@ export const EngineTable: React.FC<IEngineTableProps> = ({
   pagination: { totalEngines, pageIndex, onPaginate },
 }) => {
   const { http } = useValues(HttpLogic);
-  const {
-    externalUrl: { getAppSearchUrl },
-  } = useContext(KibanaContext) as IKibanaContext;
 
   const engineLinkProps = (name: string) => ({
     href: getAppSearchUrl(getEngineRoute(name)),

x-pack/plugins/enterprise_search/public/applications/app_search/index.test.tsx

@@ -6,6 +6,7 @@
 
 import '../__mocks__/shallow_usecontext.mock';
 import '../__mocks__/kea.mock';
+import '../__mocks__/enterprise_search_url.mock';
 
 import React, { useContext } from 'react';
 import { Redirect } from 'react-router-dom';

x-pack/plugins/enterprise_search/public/applications/app_search/index.tsx

@@ -11,6 +11,7 @@ import { useActions, useValues } from 'kea';
 import { i18n } from '@kbn/i18n';
 
 import { KibanaContext, IKibanaContext } from '../index';
+import { getAppSearchUrl } from '../shared/enterprise_search_url';
 import { HttpLogic } from '../shared/http';
 import { AppLogic } from './app_logic';
 import { IInitialAppData } from '../../../common/types';
@@ -86,10 +87,6 @@ export const AppSearchConfigured: React.FC<IInitialAppData> = (props) => {
 };
 
 export const AppSearchNav: React.FC = () => {
-  const {
-    externalUrl: { getAppSearchUrl },
-  } = useContext(KibanaContext) as IKibanaContext;
-
   const {
     myRole: { canViewSettings, canViewAccountCredentials, canViewRoleMappings },
   } = useValues(AppLogic);

x-pack/plugins/enterprise_search/public/applications/index.test.tsx

@@ -54,7 +54,7 @@ describe('renderHeaderActions', () => {
     const mockHeaderEl = document.createElement('header');
     const MockHeaderActions = () => <button className="hello-world">Hello World</button>;
 
-    const unmount = renderHeaderActions(MockHeaderActions, mockHeaderEl, {} as any);
+    const unmount = renderHeaderActions(MockHeaderActions, mockHeaderEl);
     expect(mockHeaderEl.querySelector('.hello-world')).not.toBeNull();
 
     unmount();

x-pack/plugins/enterprise_search/public/applications/index.tsx

@@ -18,12 +18,11 @@ import { PluginsStart, ClientConfigType, ClientData } from '../plugin';
 import { mountLicensingLogic } from './shared/licensing';
 import { mountHttpLogic } from './shared/http';
 import { mountFlashMessagesLogic } from './shared/flash_messages';
-import { IExternalUrl } from './shared/enterprise_search_url';
+import { externalUrl } from './shared/enterprise_search_url';
 import { IInitialAppData } from '../../common/types';
 
 export interface IKibanaContext {
   config: { host?: string };
-  externalUrl: IExternalUrl;
   navigateToUrl: ApplicationStart['navigateToUrl'];
   setBreadcrumbs(crumbs: ChromeBreadcrumb[]): void;
   setDocTitle(title: string): void;
@@ -42,7 +41,8 @@ export const renderApp = (
   { params, core, plugins }: { params: AppMountParameters; core: CoreStart; plugins: PluginsStart },
   { config, data }: { config: ClientConfigType; data: ClientData }
 ) => {
-  const { externalUrl, errorConnecting, ...initialData } = data;
+  const { publicUrl, errorConnecting, ...initialData } = data;
+  externalUrl.enterpriseSearchUrl = publicUrl || config.host || '';
 
   resetContext({ createStore: true });
   const store = getContext().store as Store;
@@ -64,7 +64,6 @@ export const renderApp = (
       <KibanaContext.Provider
         value={{
           config,
-          externalUrl,
           navigateToUrl: core.application.navigateToUrl,
           setBreadcrumbs: core.chrome.setBreadcrumbs,
           setDocTitle: core.chrome.docTitle.change,
@@ -93,15 +92,8 @@ export const renderApp = (
  * a custom HeaderActions component (e.g., WorkplaceSearchHeaderActions)
  * @see https://github.com/elastic/kibana/blob/master/docs/development/core/public/kibana-plugin-core-public.appmountparameters.setheaderactionmenu.md
  */
-interface IHeaderActionsProps {
-  externalUrl: IExternalUrl;
-}
 
-export const renderHeaderActions = (
-  HeaderActions: React.FC<IHeaderActionsProps>,
-  kibanaHeaderEl: HTMLElement,
-  externalUrl: IExternalUrl
-) => {
-  ReactDOM.render(<HeaderActions externalUrl={externalUrl} />, kibanaHeaderEl);
+export const renderHeaderActions = (HeaderActions: React.FC, kibanaHeaderEl: HTMLElement) => {
+  ReactDOM.render(<HeaderActions />, kibanaHeaderEl);
   return () => ReactDOM.unmountComponentAtNode(kibanaHeaderEl);
 };

x-pack/plugins/enterprise_search/public/applications/shared/enterprise_search_url/external_url.test.ts

@@ -0,0 +1,42 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { externalUrl, getEnterpriseSearchUrl, getAppSearchUrl, getWorkplaceSearchUrl } from './';
+
+describe('Enterprise Search external URL helpers', () => {
+  describe('getter/setter tests', () => {
+    it('defaults to an empty string', () => {
+      expect(externalUrl.enterpriseSearchUrl).toEqual('');
+    });
+
+    it('sets the internal enterpriseSearchUrl value', () => {
+      externalUrl.enterpriseSearchUrl = 'http://localhost:3002';
+      expect(externalUrl.enterpriseSearchUrl).toEqual('http://localhost:3002');
+    });
+
+    it('does not allow mutating enterpriseSearchUrl once set', () => {
+      externalUrl.enterpriseSearchUrl = 'hello world';
+      expect(externalUrl.enterpriseSearchUrl).toEqual('http://localhost:3002');
+    });
+  });
+
+  describe('function helpers', () => {
+    it('generates a public Enterprise Search URL', () => {
+      expect(getEnterpriseSearchUrl()).toEqual('http://localhost:3002');
+      expect(getEnterpriseSearchUrl('/login')).toEqual('http://localhost:3002/login');
+    });
+
+    it('generates a public App Search URL', () => {
+      expect(getAppSearchUrl()).toEqual('http://localhost:3002/as');
+      expect(getAppSearchUrl('/path')).toEqual('http://localhost:3002/as/path');
+    });
+
+    it('generates a public Workplace Search URL', () => {
+      expect(getWorkplaceSearchUrl()).toEqual('http://localhost:3002/ws');
+      expect(getWorkplaceSearchUrl('/path')).toEqual('http://localhost:3002/ws/path');
+    });
+  });
+});

x-pack/plugins/enterprise_search/public/applications/shared/enterprise_search_url/external_url.ts

@@ -0,0 +1,37 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+/**
+ * NOTE: The externalUrl obj holds the reference to externalUrl, which should
+ * only ever be updated once on plugin init. We're using a getter and setter
+ * here to ensure it isn't accidentally mutated.
+ *
+ * Someday (8.x+), when our UI is entirely on Kibana and no longer on
+ * Enterprise Search's standalone UI, we can potentially deprecate this helper.
+ */
+export const externalUrl = {
+  _enterpriseSearchUrl: '',
+  get enterpriseSearchUrl() {
+    return this._enterpriseSearchUrl;
+  },
+  set enterpriseSearchUrl(value) {
+    if (this._enterpriseSearchUrl) {
+      // enterpriseSearchUrl is set once on plugin init - we should not mutate it
+      return;
+    }
+    this._enterpriseSearchUrl = value;
+  },
+};
+
+export const getEnterpriseSearchUrl = (path: string = ''): string => {
+  return externalUrl.enterpriseSearchUrl + path;
+};
+export const getAppSearchUrl = (path: string = ''): string => {
+  return getEnterpriseSearchUrl('/as' + path);
+};
+export const getWorkplaceSearchUrl = (path: string = ''): string => {
+  return getEnterpriseSearchUrl('/ws' + path);
+};

x-pack/plugins/enterprise_search/public/applications/shared/enterprise_search_url/index.ts

@@ -4,4 +4,9 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-export { ExternalUrl, IExternalUrl } from './generate_external_url';
+export {
+  externalUrl,
+  getEnterpriseSearchUrl,
+  getAppSearchUrl,
+  getWorkplaceSearchUrl,
+} from './external_url';