[Discover] View mode changes should trigger Unsaved changes badge in …

…ES|QL (elastic#187244)

- Closes elastic#184624

## Summary

This PR updates the logic to show Unsaved changes badge when view mode
changes in ES|QL mode.

### Checklist

- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios

---------

Co-authored-by: Matthias Wilhelm <[email protected]>
(cherry picked from commit 25d7346)

src/plugins/discover/public/application/main/state_management/discover_saved_search_container.test.ts

@@ -14,6 +14,8 @@ import { dataViewMock } from '@kbn/discover-utils/src/__mocks__';
 import { dataViewComplexMock } from '../../../__mocks__/data_view_complex';
 import { getDiscoverGlobalStateContainer } from './discover_global_state_container';
 import { createKbnUrlStateStorage } from '@kbn/kibana-utils-plugin/public';
+import { VIEW_MODE } from '../../../../common/constants';
+import { createSearchSourceMock } from '@kbn/data-plugin/common/search/search_source/mocks';
 
 describe('DiscoverSavedSearchContainer', () => {
   const savedSearch = savedSearchMock;
@@ -232,4 +234,57 @@ describe('DiscoverSavedSearchContainer', () => {
       expect(savedSearchContainer.getHasChanged$().getValue()).toBe(false);
     });
   });
+
+  describe('isEqualSavedSearch', () => {
+    it('should return true for equal saved searches', () => {
+      const savedSearch1 = savedSearchMock;
+      const savedSearch2 = { ...savedSearchMock };
+      expect(isEqualSavedSearch(savedSearch1, savedSearch2)).toBe(true);
+    });
+
+    it('should return false for different saved searches', () => {
+      const savedSearch1 = savedSearchMock;
+      const savedSearch2 = { ...savedSearchMock, title: 'New title' };
+      expect(isEqualSavedSearch(savedSearch1, savedSearch2)).toBe(false);
+    });
+
+    it('should return true for saved searches with equal default values of viewMode and false otherwise', () => {
+      const savedSearch1 = { ...savedSearchMock, viewMode: undefined };
+      const savedSearch2 = { ...savedSearchMock, viewMode: VIEW_MODE.DOCUMENT_LEVEL };
+      const savedSearch3 = { ...savedSearchMock, viewMode: VIEW_MODE.AGGREGATED_LEVEL };
+      expect(isEqualSavedSearch(savedSearch1, savedSearch2)).toBe(true);
+      expect(isEqualSavedSearch(savedSearch2, savedSearch1)).toBe(true);
+      expect(isEqualSavedSearch(savedSearch1, savedSearch3)).toBe(false);
+      expect(isEqualSavedSearch(savedSearch2, savedSearch3)).toBe(false);
+    });
+
+    it('should return true for saved searches with equal default values of breakdownField and false otherwise', () => {
+      const savedSearch1 = { ...savedSearchMock, breakdownField: undefined };
+      const savedSearch2 = { ...savedSearchMock, breakdownField: '' };
+      const savedSearch3 = { ...savedSearchMock, breakdownField: 'test' };
+      expect(isEqualSavedSearch(savedSearch1, savedSearch2)).toBe(true);
+      expect(isEqualSavedSearch(savedSearch2, savedSearch1)).toBe(true);
+      expect(isEqualSavedSearch(savedSearch1, savedSearch3)).toBe(false);
+      expect(isEqualSavedSearch(savedSearch2, savedSearch3)).toBe(false);
+    });
+
+    it('should check searchSource fields', () => {
+      const savedSearch1 = {
+        ...savedSearchMock,
+        searchSource: createSearchSourceMock({
+          index: savedSearchMock.searchSource.getField('index'),
+        }),
+      };
+      const savedSearch2 = {
+        ...savedSearchMock,
+        searchSource: createSearchSourceMock({
+          index: savedSearchMock.searchSource.getField('index'),
+        }),
+      };
+      expect(isEqualSavedSearch(savedSearch1, savedSearch1)).toBe(true);
+      expect(isEqualSavedSearch(savedSearch1, savedSearch2)).toBe(true);
+      savedSearch2.searchSource.setField('query', { language: 'lucene', query: 'test' });
+      expect(isEqualSavedSearch(savedSearch1, savedSearch2)).toBe(false);
+    });
+  });
 });

src/plugins/discover/public/application/main/state_management/discover_saved_search_container.ts

@@ -341,12 +341,7 @@ export function isEqualSavedSearch(savedSearchPrev: SavedSearch, savedSearchNext
     const prevValue = getSavedSearchFieldForComparison(prevSavedSearch, key);
     const nextValue = getSavedSearchFieldForComparison(nextSavedSearchWithoutSearchSource, key);
 
-    const isSame =
-      isEqual(prevValue, nextValue) ||
-      // By default, viewMode: undefined is equivalent to documents view
-      // So they should be treated as same
-      (key === 'viewMode' &&
-        (prevValue ?? VIEW_MODE.DOCUMENT_LEVEL) === (nextValue ?? VIEW_MODE.DOCUMENT_LEVEL));
+    const isSame = isEqual(prevValue, nextValue);
 
     if (!isSame) {
       addLog('[savedSearch] difference between initial and changed version', {
@@ -412,6 +407,12 @@ function getSavedSearchFieldForComparison(
     return savedSearch.breakdownField || ''; // ignore the difference between an empty string and undefined
   }
 
+  if (fieldName === 'viewMode') {
+    // By default, viewMode: undefined is equivalent to documents view
+    // So they should be treated as same
+    return savedSearch.viewMode ?? VIEW_MODE.DOCUMENT_LEVEL;
+  }
+
   return savedSearch[fieldName];
 }
 

src/plugins/discover/public/application/main/state_management/utils/build_state_subscribe.test.ts

@@ -11,14 +11,16 @@ import { FetchStatus } from '../../../types';
 import { dataViewComplexMock } from '../../../../__mocks__/data_view_complex';
 import { getDiscoverStateMock } from '../../../../__mocks__/discover_state.mock';
 import { discoverServiceMock } from '../../../../__mocks__/services';
-import { createDataViewDataSource } from '../../../../../common/data_sources';
+import { createDataViewDataSource, DataSourceType } from '../../../../../common/data_sources';
+import { VIEW_MODE } from '@kbn/saved-search-plugin/common';
 
 describe('buildStateSubscribe', () => {
   const savedSearch = savedSearchMock;
   const stateContainer = getDiscoverStateMock({ savedSearch });
   stateContainer.dataState.refetch$.next = jest.fn();
   stateContainer.dataState.reset = jest.fn();
   stateContainer.actions.setDataView = jest.fn();
+  stateContainer.savedSearchState.update = jest.fn();
 
   const getSubscribeFn = () => {
     return buildStateSubscribe({
@@ -51,6 +53,20 @@ describe('buildStateSubscribe', () => {
     expect(stateContainer.dataState.refetch$.next).not.toHaveBeenCalled();
   });
 
+  it('should not call refetch$ if viewMode changes', async () => {
+    await getSubscribeFn()({
+      ...stateContainer.appState.getState(),
+      dataSource: {
+        type: DataSourceType.Esql,
+      },
+      viewMode: VIEW_MODE.AGGREGATED_LEVEL,
+    });
+
+    expect(stateContainer.dataState.refetch$.next).not.toHaveBeenCalled();
+    expect(stateContainer.dataState.reset).not.toHaveBeenCalled();
+    expect(stateContainer.savedSearchState.update).toHaveBeenCalled();
+  });
+
   it('should call refetch$ if the chart is hidden', async () => {
     await getSubscribeFn()({ hideChart: true });
 

src/plugins/discover/public/application/main/state_management/utils/build_state_subscribe.ts

@@ -55,12 +55,14 @@ export const buildStateSubscribe =
     const isEsqlMode = isDataSourceType(nextState.dataSource, DataSourceType.Esql);
     const queryChanged = !isEqual(nextQuery, prevQuery) || !isEqual(nextQuery, prevState.query);
 
-    if (
-      isEsqlMode &&
-      isEqualState(prevState, nextState, ['dataSource', 'viewMode']) &&
-      !queryChanged
-    ) {
-      // When there's a switch from data view to es|ql, this just leads to a cleanup of index and viewMode
+    if (isEsqlMode && prevState.viewMode !== nextState.viewMode && !queryChanged) {
+      savedSearchState.update({ nextState });
+      addLog('[appstate] subscribe $fetch ignored for es|ql', { prevState, nextState });
+      return;
+    }
+
+    if (isEsqlMode && isEqualState(prevState, nextState, ['dataSource']) && !queryChanged) {
+      // When there's a switch from data view to es|ql, this just leads to a cleanup of index
       // And there's no subsequent action in this function required
       addLog('[appstate] subscribe update ignored for es|ql', { prevState, nextState });
       return;