[ML] Fix unnecessary trigger of wildcard field type search for ML plugin routes. (#84605)

Passing in an empty string '' to useResolver() would trigger a wild card search across all indices and fields, potentially causing a timeout and the page would fail to load. The following pages were affected: Single Metric Viewer, Data frame analytics models list, Data frame analytics jobs list, Data frame analytics exploration page, File Data Visualizer (Data visualizer - Import data from a log file). This PR fixes it by passing undefined instead of '' to useResolver to avoid calling _fields_for_wildcard with an empty pattern. Jest tests were added to cover the two parameter scenarios empty string/undefined.

x-pack/plugins/ml/public/application/jobs/new_job/utils/new_job_utils.ts

@@ -30,7 +30,7 @@ export function getDefaultDatafeedQuery() {
 
 export function createSearchItems(
   kibanaConfig: IUiSettingsClient,
-  indexPattern: IIndexPattern,
+  indexPattern: IIndexPattern | undefined,
   savedSearch: SavedSearchSavedObject | null
 ) {
   // query is only used by the data visualizer as it needs

x-pack/plugins/ml/public/application/routing/routes/data_frame_analytics/analytics_job_exploration.tsx

@@ -38,7 +38,7 @@ export const analyticsJobExplorationRouteFactory = (
 });
 
 const PageWrapper: FC<PageProps> = ({ location, deps }) => {
-  const { context } = useResolver('', undefined, deps.config, basicResolvers(deps));
+  const { context } = useResolver(undefined, undefined, deps.config, basicResolvers(deps));
 
   const [globalState] = useUrlState('_g');
 

x-pack/plugins/ml/public/application/routing/routes/data_frame_analytics/analytics_jobs_list.tsx

@@ -34,7 +34,7 @@ export const analyticsJobsListRouteFactory = (
 });
 
 const PageWrapper: FC<PageProps> = ({ location, deps }) => {
-  const { context } = useResolver('', undefined, deps.config, basicResolvers(deps));
+  const { context } = useResolver(undefined, undefined, deps.config, basicResolvers(deps));
   return (
     <PageLoader context={context}>
       <Page />

x-pack/plugins/ml/public/application/routing/routes/data_frame_analytics/analytics_map.tsx

@@ -34,7 +34,7 @@ export const analyticsMapRouteFactory = (
 });
 
 const PageWrapper: FC<PageProps> = ({ deps }) => {
-  const { context } = useResolver('', undefined, deps.config, basicResolvers(deps));
+  const { context } = useResolver(undefined, undefined, deps.config, basicResolvers(deps));
 
   return (
     <PageLoader context={context}>

x-pack/plugins/ml/public/application/routing/routes/data_frame_analytics/models_list.tsx

@@ -34,7 +34,7 @@ export const modelsListRouteFactory = (
 });
 
 const PageWrapper: FC<PageProps> = ({ location, deps }) => {
-  const { context } = useResolver('', undefined, deps.config, basicResolvers(deps));
+  const { context } = useResolver(undefined, undefined, deps.config, basicResolvers(deps));
   return (
     <PageLoader context={context}>
       <Page />

x-pack/plugins/ml/public/application/routing/routes/datavisualizer/file_based.tsx

@@ -45,7 +45,7 @@ export const fileBasedRouteFactory = (
 const PageWrapper: FC<PageProps> = ({ location, deps }) => {
   const { redirectToMlAccessDeniedPage } = deps;
 
-  const { context } = useResolver('', undefined, deps.config, {
+  const { context } = useResolver(undefined, undefined, deps.config, {
     checkBasicLicense,
     loadIndexPatterns: () => loadIndexPatterns(deps.indexPatterns),
     checkFindFileStructurePrivilege: () =>

x-pack/plugins/ml/public/application/routing/routes/timeseriesexplorer.tsx

@@ -63,7 +63,7 @@ export const timeSeriesExplorerRouteFactory = (
 });
 
 const PageWrapper: FC<PageProps> = ({ deps }) => {
-  const { context, results } = useResolver('', undefined, deps.config, {
+  const { context, results } = useResolver(undefined, undefined, deps.config, {
     ...basicResolvers(deps),
     jobs: mlJobService.loadJobsWrapper,
     jobsWithTimeRange: () => ml.jobs.jobsWithTimerange(getDateFormatTz()),

x-pack/plugins/ml/public/application/routing/use_resolver.test.ts

@@ -0,0 +1,89 @@
+/*
+ * 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 { renderHook, act } from '@testing-library/react-hooks';
+
+import { IUiSettingsClient } from 'kibana/public';
+
+import { useCreateAndNavigateToMlLink } from '../contexts/kibana/use_create_url';
+import { useNotifications } from '../contexts/kibana';
+
+import { useResolver } from './use_resolver';
+
+jest.mock('../contexts/kibana/use_create_url', () => {
+  return {
+    useCreateAndNavigateToMlLink: jest.fn(),
+  };
+});
+
+jest.mock('../contexts/kibana', () => {
+  return {
+    useMlUrlGenerator: () => ({
+      createUrl: jest.fn(),
+    }),
+    useNavigateToPath: () => jest.fn(),
+    useNotifications: jest.fn(),
+  };
+});
+
+const addError = jest.fn();
+(useNotifications as jest.Mock).mockImplementation(() => ({
+  toasts: { addSuccess: jest.fn(), addDanger: jest.fn(), addError },
+}));
+
+const redirectToJobsManagementPage = jest.fn(() => Promise.resolve());
+(useCreateAndNavigateToMlLink as jest.Mock).mockImplementation(() => redirectToJobsManagementPage);
+
+describe('useResolver', () => {
+  afterEach(() => {
+    jest.useFakeTimers();
+  });
+  afterEach(() => {
+    jest.advanceTimersByTime(0);
+    jest.useRealTimers();
+  });
+
+  it('should accept undefined as indexPatternId and savedSearchId.', async () => {
+    const { result, waitForNextUpdate } = renderHook(() =>
+      useResolver(undefined, undefined, {} as IUiSettingsClient, {})
+    );
+
+    await act(async () => {
+      await waitForNextUpdate();
+    });
+
+    expect(result.current).toStrictEqual({
+      context: {
+        combinedQuery: {
+          bool: {
+            must: [
+              {
+                match_all: {},
+              },
+            ],
+          },
+        },
+        currentIndexPattern: null,
+        currentSavedSearch: null,
+        indexPatterns: null,
+        kibanaConfig: {},
+      },
+      results: {},
+    });
+    expect(addError).toHaveBeenCalledTimes(0);
+    expect(redirectToJobsManagementPage).toHaveBeenCalledTimes(0);
+  });
+
+  it('should add an error toast and redirect if indexPatternId is an empty string.', async () => {
+    const { result } = renderHook(() => useResolver('', undefined, {} as IUiSettingsClient, {}));
+
+    await act(async () => {});
+
+    expect(result.current).toStrictEqual({ context: null, results: {} });
+    expect(addError).toHaveBeenCalledTimes(1);
+    expect(redirectToJobsManagementPage).toHaveBeenCalledTimes(1);
+  });
+});

x-pack/plugins/ml/public/application/routing/use_resolver.ts

@@ -11,6 +11,7 @@ import {
   getIndexPatternById,
   getIndexPatternsContract,
   getIndexPatternAndSavedSearch,
+  IndexPatternAndSavedSearch,
 } from '../util/index_utils';
 import { createSearchItems } from '../jobs/new_job/utils/new_job_utils';
 import { ResolverResults, Resolvers } from './resolvers';
@@ -19,6 +20,14 @@ import { useNotifications } from '../contexts/kibana';
 import { useCreateAndNavigateToMlLink } from '../contexts/kibana/use_create_url';
 import { ML_PAGES } from '../../../common/constants/ml_url_generator';
 
+/**
+ * Hook to resolve route specific requirements
+ * @param indexPatternId optional Kibana index pattern id, used for wizards
+ * @param savedSearchId optional Kibana saved search id, used for wizards
+ * @param config Kibana UI Settings
+ * @param resolvers an array of resolvers to be executed for the route
+ * @return { context, results } returns the ML context and resolver results
+ */
 export const useResolver = (
   indexPatternId: string | undefined,
   savedSearchId: string | undefined,
@@ -52,36 +61,49 @@ export const useResolver = (
         return;
       }
 
-      if (indexPatternId !== undefined || savedSearchId !== undefined) {
-        try {
-          // note, currently we're using our own kibana context that requires a current index pattern to be set
-          // this means, if the page uses this context, useResolver must be passed a string for the index pattern id
-          // and loadIndexPatterns must be part of the resolvers.
-          const { indexPattern, savedSearch } =
-            savedSearchId !== undefined
-              ? await getIndexPatternAndSavedSearch(savedSearchId)
-              : { savedSearch: null, indexPattern: await getIndexPatternById(indexPatternId!) };
-
-          const { combinedQuery } = createSearchItems(config, indexPattern!, savedSearch);
-
-          setContext({
-            combinedQuery,
-            currentIndexPattern: indexPattern,
-            currentSavedSearch: savedSearch,
-            indexPatterns: getIndexPatternsContract()!,
-            kibanaConfig: config,
-          });
-        } catch (error) {
-          // an unexpected error has occurred. This could be caused by an incorrect index pattern or saved search ID
-          notifications.toasts.addError(new Error(error), {
-            title: i18n.translate('xpack.ml.useResolver.errorTitle', {
-              defaultMessage: 'An error has occurred',
-            }),
-          });
-          await redirectToJobsManagementPage();
+      try {
+        if (indexPatternId === '') {
+          throw new Error(
+            i18n.translate('xpack.ml.useResolver.errorIndexPatternIdEmptyString', {
+              defaultMessage: 'indexPatternId must not be empty string.',
+            })
+          );
         }
-      } else {
-        setContext({});
+
+        let indexPatternAndSavedSearch: IndexPatternAndSavedSearch = {
+          savedSearch: null,
+          indexPattern: null,
+        };
+
+        if (savedSearchId !== undefined) {
+          indexPatternAndSavedSearch = await getIndexPatternAndSavedSearch(savedSearchId);
+        } else if (indexPatternId !== undefined) {
+          indexPatternAndSavedSearch.indexPattern = await getIndexPatternById(indexPatternId);
+        }
+
+        const { savedSearch, indexPattern } = indexPatternAndSavedSearch;
+
+        const { combinedQuery } = createSearchItems(
+          config,
+          indexPattern !== null ? indexPattern : undefined,
+          savedSearch
+        );
+
+        setContext({
+          combinedQuery,
+          currentIndexPattern: indexPattern,
+          currentSavedSearch: savedSearch,
+          indexPatterns: getIndexPatternsContract(),
+          kibanaConfig: config,
+        });
+      } catch (error) {
+        // an unexpected error has occurred. This could be caused by an incorrect index pattern or saved search ID
+        notifications.toasts.addError(new Error(error), {
+          title: i18n.translate('xpack.ml.useResolver.errorTitle', {
+            defaultMessage: 'An error has occurred',
+          }),
+        });
+        await redirectToJobsManagementPage();
       }
     })();
   }, []);

x-pack/plugins/ml/public/application/util/index_utils.ts

@@ -73,9 +73,12 @@ export function getIndexPatternIdFromName(name: string) {
   }
   return null;
 }
-
+export interface IndexPatternAndSavedSearch {
+  savedSearch: SavedSearchSavedObject | null;
+  indexPattern: IIndexPattern | null;
+}
 export async function getIndexPatternAndSavedSearch(savedSearchId: string) {
-  const resp: { savedSearch: SavedSearchSavedObject | null; indexPattern: IIndexPattern | null } = {
+  const resp: IndexPatternAndSavedSearch = {
     savedSearch: null,
     indexPattern: null,
   };