[Console] Get ES Config from core (elastic#75406)

* Server side changes

- removed console_legacy plugin!
- added new es_config endpoint that returns server side es config
  at the moment this is just the first value in hosts
- Slight refactor to how routes are registered to bring them more
  in line with other ES UI plugins

* Client side update

- Updated the client to not get es host from injected metadata.
  Instead use the new endpoint created server side that returns
  this value
- Added a small README.md regarding the hooks lib and need to
  refactor use of jQuery in console
- Write code to init the es host value on the client once at start
  up in a non-blocking way. If this fails we just use the default
  value of http://localhost:9200 as this powers non-essential
  console functionality (i.e., copy as cURL).

* fix type issue and jest tests

* fix another type issue

* simplify proxy assignment in proxy handler mock

Co-authored-by: Elastic Machine <[email protected]>

src/plugins/console/common/types/api_responses.ts

@@ -0,0 +1,29 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+export interface EsConfigApiResponse {
+  /**
+   * This is the first host in the hosts array that Kibana is configured to use
+   * to communicate with ES.
+   *
+   * At the moment this is used to power the copy as cURL functionality in Console
+   * to complete the host portion of the URL.
+   */
+  host?: string;
+}

src/plugins/console/public/application/containers/editor/legacy/console_editor/editor.tsx

@@ -67,9 +67,8 @@ const inputId = 'ConAppInputTextarea';
 
 function EditorUI({ initialTextValue }: EditorProps) {
   const {
-    services: { history, notifications, settings: settingsService },
+    services: { history, notifications, settings: settingsService, esHostService },
     docLinkVersion,
-    elasticsearchUrl,
   } = useServicesContext();
 
   const { settings } = useEditorReadContext();
@@ -232,7 +231,7 @@ function EditorUI({ initialTextValue }: EditorProps) {
           <EuiFlexItem>
             <ConsoleMenu
               getCurl={() => {
-                return editorInstanceRef.current!.getRequestsAsCURL(elasticsearchUrl);
+                return editorInstanceRef.current!.getRequestsAsCURL(esHostService.getHost());
               }}
               getDocumentation={() => {
                 return getDocumentation(editorInstanceRef.current!, docLinkVersion);

src/plugins/console/public/application/contexts/services_context.mock.ts

@@ -17,21 +17,27 @@
  * under the License.
  */
 import { notificationServiceMock } from '../../../../../core/public/mocks';
+import { httpServiceMock } from '../../../../../core/public/mocks';
+
 import { HistoryMock } from '../../services/history.mock';
 import { SettingsMock } from '../../services/settings.mock';
 import { StorageMock } from '../../services/storage.mock';
+import { createApi, createEsHostService } from '../lib';
 
 import { ContextValue } from './services_context';
 
 export const serviceContextMock = {
   create: (): ContextValue => {
     const storage = new StorageMock({} as any, 'test');
+    const http = httpServiceMock.createSetupContract();
+    const api = createApi({ http });
+    const esHostService = createEsHostService({ api });
     (storage.keys as jest.Mock).mockImplementation(() => []);
     return {
-      elasticsearchUrl: 'test',
       services: {
         trackUiMetric: { count: () => {}, load: () => {} },
         storage,
+        esHostService,
         settings: new SettingsMock(storage),
         history: new HistoryMock(storage),
         notifications: notificationServiceMock.createSetupContract(),

src/plugins/console/public/application/contexts/services_context.tsx

@@ -17,22 +17,25 @@
  * under the License.
  */
 
-import React, { createContext, useContext } from 'react';
+import React, { createContext, useContext, useEffect } from 'react';
 import { NotificationsSetup } from 'kibana/public';
-import { History, Storage, Settings } from '../../services';
+import { History, Settings, Storage } from '../../services';
 import { ObjectStorageClient } from '../../../common/types';
 import { MetricsTracker } from '../../types';
+import { EsHostService } from '../lib';
+
+interface ContextServices {
+  history: History;
+  storage: Storage;
+  settings: Settings;
+  notifications: NotificationsSetup;
+  objectStorageClient: ObjectStorageClient;
+  trackUiMetric: MetricsTracker;
+  esHostService: EsHostService;
+}
 
 export interface ContextValue {
-  services: {
-    history: History;
-    storage: Storage;
-    settings: Settings;
-    notifications: NotificationsSetup;
-    objectStorageClient: ObjectStorageClient;
-    trackUiMetric: MetricsTracker;
-  };
-  elasticsearchUrl: string;
+  services: ContextServices;
   docLinkVersion: string;
 }
 
@@ -44,6 +47,11 @@ interface ContextProps {
 const ServicesContext = createContext<ContextValue>(null as any);
 
 export function ServicesContextProvider({ children, value }: ContextProps) {
+  useEffect(() => {
+    // Fire and forget, we attempt to init the host service once.
+    value.services.esHostService.init();
+  }, [value.services.esHostService]);
+
   return <ServicesContext.Provider value={value}>{children}</ServicesContext.Provider>;
 }
 

src/plugins/console/public/application/hooks/README.md

@@ -0,0 +1,5 @@
+## Notes
+
+* Do not add any code directly to this directory. This code should be moved to the neighbouring `lib` directory to be in line with future ES UI plugin patterns.
+
+* The `es.send` method uses $.ajax under the hood and needs to be refactored to use the new platform-provided http client.

src/plugins/console/public/application/index.tsx

@@ -19,19 +19,20 @@
 
 import React from 'react';
 import { render, unmountComponentAtNode } from 'react-dom';
-import { NotificationsSetup } from 'src/core/public';
+import { HttpSetup, NotificationsSetup } from 'src/core/public';
 import { ServicesContextProvider, EditorContextProvider, RequestContextProvider } from './contexts';
 import { Main } from './containers';
 import { createStorage, createHistory, createSettings } from '../services';
 import * as localStorageObjectClient from '../lib/local_storage_object_client';
 import { createUsageTracker } from '../services/tracker';
 import { UsageCollectionSetup } from '../../../usage_collection/public';
+import { createApi, createEsHostService } from './lib';
 
 export interface BootDependencies {
+  http: HttpSetup;
   docLinkVersion: string;
   I18nContext: any;
   notifications: NotificationsSetup;
-  elasticsearchUrl: string;
   usageCollection?: UsageCollectionSetup;
   element: HTMLElement;
 }
@@ -40,9 +41,9 @@ export function renderApp({
   I18nContext,
   notifications,
   docLinkVersion,
-  elasticsearchUrl,
   usageCollection,
   element,
+  http,
 }: BootDependencies) {
   const trackUiMetric = createUsageTracker(usageCollection);
   trackUiMetric.load('opened_app');
@@ -54,14 +55,16 @@ export function renderApp({
   const history = createHistory({ storage });
   const settings = createSettings({ storage });
   const objectStorageClient = localStorageObjectClient.create(storage);
+  const api = createApi({ http });
+  const esHostService = createEsHostService({ api });
 
   render(
     <I18nContext>
       <ServicesContextProvider
         value={{
-          elasticsearchUrl,
           docLinkVersion,
           services: {
+            esHostService,
             storage,
             history,
             settings,

src/plugins/console/public/application/lib/api.ts

@@ -0,0 +1,39 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { HttpSetup } from 'kibana/public';
+import { EsConfigApiResponse } from '../../../common/types/api_responses';
+import { sendRequest } from '../../shared_imports';
+
+interface Dependencies {
+  http: HttpSetup;
+}
+
+export type Api = ReturnType<typeof createApi>;
+
+export const createApi = ({ http }: Dependencies) => {
+  return {
+    getEsConfig: () => {
+      return sendRequest<EsConfigApiResponse>(http, {
+        path: '/api/console/es_config',
+        method: 'get',
+      });
+    },
+  };
+};

src/plugins/console/public/application/lib/es_host_service.ts

@@ -0,0 +1,54 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { Api } from './api';
+
+/**
+ * Very simple state for holding the current ES host.
+ *
+ * This is used to power the copy as cURL functionality.
+ */
+export class EsHostService {
+  private host = 'http://localhost:9200';
+
+  constructor(private readonly api: Api) {}
+
+  private setHost(host: string): void {
+    this.host = host;
+  }
+
+  /**
+   * Initialize the host value based on the value set on the server.
+   *
+   * This call is necessary because this value can only be retrieved at
+   * runtime.
+   */
+  public async init() {
+    const { data } = await this.api.getEsConfig();
+    if (data && data.host) {
+      this.setHost(data.host);
+    }
+  }
+
+  public getHost(): string {
+    return this.host;
+  }
+}
+
+export const createEsHostService = ({ api }: { api: Api }) => new EsHostService(api);

src/plugins/console/public/application/lib/index.ts

@@ -0,0 +1,21 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+export { createApi, Api } from './api';
+export { createEsHostService, EsHostService } from './es_host_service';

src/plugins/console/public/plugin.ts

@@ -25,7 +25,7 @@ import { AppSetupUIPluginDependencies } from './types';
 
 export class ConsoleUIPlugin implements Plugin<void, void, AppSetupUIPluginDependencies> {
   public setup(
-    { notifications, getStartServices }: CoreSetup,
+    { notifications, getStartServices, http }: CoreSetup,
     { devTools, home, usageCollection }: AppSetupUIPluginDependencies
   ) {
     home.featureCatalogue.register({
@@ -53,23 +53,17 @@ export class ConsoleUIPlugin implements Plugin<void, void, AppSetupUIPluginDepen
         const [core] = await getStartServices();
 
         const {
-          injectedMetadata,
           i18n: { Context: I18nContext },
           docLinks: { DOC_LINK_VERSION },
         } = core;
 
         const { renderApp } = await import('./application');
 
-        const elasticsearchUrl = injectedMetadata.getInjectedVar(
-          'elasticsearchUrl',
-          'http://localhost:9200'
-        ) as string;
-
         return renderApp({
+          http,
           docLinkVersion: DOC_LINK_VERSION,
           I18nContext,
           notifications,
-          elasticsearchUrl,
           usageCollection,
           element,
         });