Lazy load reporting (#80492)

* perf: ⚡️ load dynamically reporting management section

* refactor: 💡 remove JSX from main plugin entry file

* perf: ⚡️ lazy-load CSV sharing panel React component

* perf: ⚡️ lazy-load screen capture sharing panel React components

* feat: 🎸 show spinner while shring panels are loading

x-pack/plugins/reporting/public/components/panel_spinner.tsx

@@ -0,0 +1,22 @@
+/*
+ * 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 * as React from 'react';
+import { EuiSpacer, EuiFlexGroup, EuiFlexItem, EuiLoadingSpinner } from '@elastic/eui';
+
+export const PanelSpinner: React.FC = (props) => {
+  return (
+    <>
+      <EuiSpacer />
+      <EuiFlexGroup justifyContent="spaceAround">
+        <EuiFlexItem grow={false}>
+          <EuiLoadingSpinner size="l" />
+        </EuiFlexItem>
+      </EuiFlexGroup>
+      <EuiSpacer />
+    </>
+  );
+};

x-pack/plugins/reporting/public/components/reporting_panel_content.tsx

@@ -13,7 +13,7 @@ import { toMountPoint } from '../../../../../src/plugins/kibana_react/public';
 import { BaseParams } from '../../common/types';
 import { ReportingAPIClient } from '../lib/reporting_api_client';
 
-interface Props {
+export interface Props {
   apiClient: ReportingAPIClient;
   toasts: ToastsSetup;
   reportType: string;

x-pack/plugins/reporting/public/components/reporting_panel_content_lazy.tsx

@@ -0,0 +1,24 @@
+/*
+ * 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 * as React from 'react';
+import { lazy, Suspense, FC } from 'react';
+import { PanelSpinner } from './panel_spinner';
+import type { Props } from './reporting_panel_content';
+
+const LazyComponent = lazy(() =>
+  import('./reporting_panel_content').then(({ ReportingPanelContent }) => ({
+    default: ReportingPanelContent,
+  }))
+);
+
+export const ReportingPanelContent: FC<Omit<Props, 'intl'>> = (props) => {
+  return (
+    <Suspense fallback={<PanelSpinner />}>
+      <LazyComponent {...props} />
+    </Suspense>
+  );
+};

x-pack/plugins/reporting/public/components/screen_capture_panel_content.tsx

@@ -12,7 +12,7 @@ import { BaseParams } from '../../common/types';
 import { ReportingAPIClient } from '../lib/reporting_api_client';
 import { ReportingPanelContent } from './reporting_panel_content';
 
-interface Props {
+export interface Props {
   apiClient: ReportingAPIClient;
   toasts: ToastsSetup;
   reportType: string;

x-pack/plugins/reporting/public/components/screen_capture_panel_content_lazy.tsx

@@ -0,0 +1,24 @@
+/*
+ * 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 * as React from 'react';
+import { lazy, Suspense, FC } from 'react';
+import { PanelSpinner } from './panel_spinner';
+import type { Props } from './screen_capture_panel_content';
+
+const LazyComponent = lazy(() =>
+  import('./screen_capture_panel_content').then(({ ScreenCapturePanelContent }) => ({
+    default: ScreenCapturePanelContent,
+  }))
+);
+
+export const ScreenCapturePanelContent: FC<Props> = (props) => {
+  return (
+    <Suspense fallback={<PanelSpinner />}>
+      <LazyComponent {...props} />
+    </Suspense>
+  );
+};

x-pack/plugins/reporting/public/mount_management_section.tsx

@@ -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 * as React from 'react';
+import { render, unmountComponentAtNode } from 'react-dom';
+import { I18nProvider } from '@kbn/i18n/react';
+import { CoreSetup, CoreStart } from 'src/core/public';
+import { Observable } from 'rxjs';
+import { ReportListing } from './components/report_listing';
+import { ManagementAppMountParams } from '../../../../src/plugins/management/public';
+import { ILicense } from '../../licensing/public';
+import { ClientConfigType } from './plugin';
+import { ReportingAPIClient } from './lib/reporting_api_client';
+
+export async function mountManagementSection(
+  coreSetup: CoreSetup,
+  coreStart: CoreStart,
+  license$: Observable<ILicense>,
+  pollConfig: ClientConfigType['poll'],
+  apiClient: ReportingAPIClient,
+  params: ManagementAppMountParams
+) {
+  render(
+    <I18nProvider>
+      <ReportListing
+        toasts={coreSetup.notifications.toasts}
+        license$={license$}
+        pollConfig={pollConfig}
+        redirect={coreStart.application.navigateToApp}
+        apiClient={apiClient}
+      />
+    </I18nProvider>,
+    params.element
+  );
+
+  return () => {
+    unmountComponentAtNode(params.element);
+  };
+}

x-pack/plugins/reporting/public/plugin.tsx → x-pack/plugins/reporting/public/plugin.ts

@@ -5,9 +5,6 @@
  */
 
 import { i18n } from '@kbn/i18n';
-import { I18nProvider } from '@kbn/i18n/react';
-import React from 'react';
-import ReactDOM from 'react-dom';
 import * as Rx from 'rxjs';
 import { catchError, filter, map, mergeMap, takeUntil } from 'rxjs/operators';
 import {
@@ -17,21 +14,21 @@ import {
   Plugin,
   PluginInitializerContext,
 } from 'src/core/public';
-import { UiActionsSetup } from 'src/plugins/ui_actions/public';
+import { UiActionsSetup, UiActionsStart } from 'src/plugins/ui_actions/public';
 import { CONTEXT_MENU_TRIGGER } from '../../../../src/plugins/embeddable/public';
 import {
   FeatureCatalogueCategory,
   HomePublicPluginSetup,
+  HomePublicPluginStart,
 } from '../../../../src/plugins/home/public';
-import { ManagementSetup } from '../../../../src/plugins/management/public';
-import { SharePluginSetup } from '../../../../src/plugins/share/public';
-import { LicensingPluginSetup } from '../../licensing/public';
+import { ManagementSetup, ManagementStart } from '../../../../src/plugins/management/public';
+import { SharePluginSetup, SharePluginStart } from '../../../../src/plugins/share/public';
+import { LicensingPluginSetup, LicensingPluginStart } from '../../licensing/public';
 import { durationToNumber } from '../common/schema_utils';
 import { JobId, ReportingConfigType } from '../common/types';
 import { JOB_COMPLETION_NOTIFICATIONS_SESSION_KEY } from '../constants';
 import { JobSummarySet } from './';
 import { getGeneralErrorToast } from './components';
-import { ReportListing } from './components/report_listing';
 import { ReportingAPIClient } from './lib/reporting_api_client';
 import { ReportingNotifierStreamHandler as StreamHandler } from './lib/stream_handler';
 import { GetCsvReportPanelAction } from './panel_actions/get_csv_panel_action';
@@ -60,7 +57,25 @@ function handleError(notifications: NotificationsSetup, err: Error): Rx.Observab
   return Rx.of({ completed: [], failed: [] });
 }
 
-export class ReportingPublicPlugin implements Plugin<void, void> {
+export interface ReportingPublicPluginSetupDendencies {
+  home: HomePublicPluginSetup;
+  management: ManagementSetup;
+  licensing: LicensingPluginSetup;
+  uiActions: UiActionsSetup;
+  share: SharePluginSetup;
+}
+
+export interface ReportingPublicPluginStartDendencies {
+  home: HomePublicPluginStart;
+  management: ManagementStart;
+  licensing: LicensingPluginStart;
+  uiActions: UiActionsStart;
+  share: SharePluginStart;
+}
+
+export class ReportingPublicPlugin
+  implements
+    Plugin<void, void, ReportingPublicPluginSetupDendencies, ReportingPublicPluginStartDendencies> {
   private config: ClientConfigType;
   private readonly stop$ = new Rx.ReplaySubject(1);
   private readonly title = i18n.translate('xpack.reporting.management.reportingTitle', {
@@ -76,19 +91,7 @@ export class ReportingPublicPlugin implements Plugin<void, void> {
 
   public setup(
     core: CoreSetup,
-    {
-      home,
-      management,
-      licensing,
-      uiActions,
-      share,
-    }: {
-      home: HomePublicPluginSetup;
-      management: ManagementSetup;
-      licensing: LicensingPluginSetup;
-      uiActions: UiActionsSetup;
-      share: SharePluginSetup;
-    }
+    { home, management, licensing, uiActions, share }: ReportingPublicPluginSetupDendencies
   ) {
     const {
       http,
@@ -119,24 +122,19 @@ export class ReportingPublicPlugin implements Plugin<void, void> {
       title: this.title,
       order: 1,
       mount: async (params) => {
-        const [start] = await getStartServices();
         params.setBreadcrumbs([{ text: this.breadcrumbText }]);
-        ReactDOM.render(
-          <I18nProvider>
-            <ReportListing
-              toasts={toasts}
-              license$={license$}
-              pollConfig={this.config.poll}
-              redirect={start.application.navigateToApp}
-              apiClient={apiClient}
-            />
-          </I18nProvider>,
-          params.element
+        const [[start], { mountManagementSection }] = await Promise.all([
+          getStartServices(),
+          import('./mount_management_section'),
+        ]);
+        return await mountManagementSection(
+          core,
+          start,
+          license$,
+          this.config.poll,
+          apiClient,
+          params
         );
-
-        return () => {
-          ReactDOM.unmountComponentAtNode(params.element);
-        };
       },
     });
 

x-pack/plugins/reporting/public/share_context_menu/register_csv_reporting.tsx

@@ -11,7 +11,7 @@ import { IUiSettingsClient, ToastsSetup } from 'src/core/public';
 import { ShareContext } from '../../../../../src/plugins/share/public';
 import { LicensingPluginSetup } from '../../../licensing/public';
 import { JobParamsCSV, SearchRequest } from '../../server/export_types/csv/types';
-import { ReportingPanelContent } from '../components/reporting_panel_content';
+import { ReportingPanelContent } from '../components/reporting_panel_content_lazy';
 import { checkLicense } from '../lib/license_check';
 import { ReportingAPIClient } from '../lib/reporting_api_client';
 

x-pack/plugins/reporting/public/share_context_menu/register_pdf_png_reporting.tsx

@@ -13,7 +13,7 @@ import { LicensingPluginSetup } from '../../../licensing/public';
 import { LayoutParams } from '../../common/types';
 import { JobParamsPNG } from '../../server/export_types/png/types';
 import { JobParamsPDF } from '../../server/export_types/printable_pdf/types';
-import { ScreenCapturePanelContent } from '../components/screen_capture_panel_content';
+import { ScreenCapturePanelContent } from '../components/screen_capture_panel_content_lazy';
 import { checkLicense } from '../lib/license_check';
 import { ReportingAPIClient } from '../lib/reporting_api_client';