fix: correctly set and unset the stackbarchart value across panel types (#9158)

frontend/src/container/NewWidget/RightContainer/index.tsx

@@ -300,6 +300,7 @@ function RightContainer({
 					style={{ width: '100%' }}
 					className="panel-type-select"
 					data-testid="panel-change-select"
+					data-stacking-state={stackedBarChart ? 'true' : 'false'}
 				>
 					{graphTypes.map((item) => (
 						<Option key={item.name} value={item.name}>

frontend/src/container/NewWidget/__test__/NewWidget.test.tsx

@@ -1,3 +1,4 @@
+/* eslint-disable sonarjs/no-duplicate-string */
 // This test suite covers several important scenarios:
 // - Empty layout - widget should be placed at origin (0,0)
 // - Empty layout with custom dimensions
@@ -6,13 +7,20 @@
 // - Handling multiple rows correctly
 // - Handling widgets with different heights
 
+import { screen } from '@testing-library/react';
 import { PANEL_TYPES } from 'constants/queryBuilder';
 import { DashboardProvider } from 'providers/Dashboard/Dashboard';
 import { PreferenceContextProvider } from 'providers/preferences/context/PreferenceContextProvider';
 import { I18nextProvider } from 'react-i18next';
 import { useSearchParams } from 'react-router-dom-v5-compat';
 import i18n from 'ReactI18';
-import { render } from 'tests/test-utils';
+import {
+	fireEvent,
+	getByText as getByTextUtil,
+	render,
+	userEvent,
+	within,
+} from 'tests/test-utils';
 
 import NewWidget from '..';
 import {
@@ -21,6 +29,28 @@ import {
 	placeWidgetBetweenRows,
 } from '../utils';
 
+// Helper function to check stack series state
+const checkStackSeriesState = (
+	container: HTMLElement,
+	expectedChecked: boolean,
+): HTMLElement => {
+	expect(getByTextUtil(container, 'Stack series')).toBeInTheDocument();
+
+	const stackSeriesSection = container.querySelector(
+		'section > .stack-chart',
+	) as HTMLElement;
+	expect(stackSeriesSection).toBeInTheDocument();
+
+	const switchElement = within(stackSeriesSection).getByRole('switch');
+	if (expectedChecked) {
+		expect(switchElement).toBeChecked();
+	} else {
+		expect(switchElement).not.toBeChecked();
+	}
+
+	return switchElement;
+};
+
 const MOCK_SEARCH_PARAMS =
 	'?graphType=bar&widgetId=b473eef0-8eb5-4dd3-8089-c1817734084f&compositeQuery=%7B"id"%3A"f026c678-9abf-42af-a3dc-f73dc8cbb810"%2C"builder"%3A%7B"queryData"%3A%5B%7B"dataSource"%3A"metrics"%2C"queryName"%3A"A"%2C"aggregateOperator"%3A"count"%2C"aggregateAttribute"%3A%7B"id"%3A"----"%2C"dataType"%3A""%2C"key"%3A""%2C"type"%3A""%7D%2C"timeAggregation"%3A"rate"%2C"spaceAggregation"%3A"sum"%2C"filter"%3A%7B"expression"%3A""%7D%2C"aggregations"%3A%5B%7B"metricName"%3A""%2C"temporality"%3A""%2C"timeAggregation"%3A"count"%2C"spaceAggregation"%3A"sum"%2C"reduceTo"%3A"avg"%7D%5D%2C"functions"%3A%5B%5D%2C"filters"%3A%7B"items"%3A%5B%5D%2C"op"%3A"AND"%7D%2C"expression"%3A"A"%2C"disabled"%3Afalse%2C"stepInterval"%3Anull%2C"having"%3A%5B%5D%2C"limit"%3Anull%2C"orderBy"%3A%5B%5D%2C"groupBy"%3A%5B%5D%2C"legend"%3A""%2C"reduceTo"%3A"avg"%2C"source"%3A""%7D%5D%2C"queryFormulas"%3A%5B%5D%2C"queryTraceOperator"%3A%5B%5D%7D%2C"clickhouse_sql"%3A%5B%7B"name"%3A"A"%2C"legend"%3A""%2C"disabled"%3Afalse%2C"query"%3A""%7D%5D%2C"promql"%3A%5B%7B"name"%3A"A"%2C"query"%3A""%2C"legend"%3A""%2C"disabled"%3Afalse%7D%5D%2C"queryType"%3A"builder"%7D&relativeTime=30m';
 // Mocks
@@ -279,7 +309,7 @@ describe('Stacking bar in new panel', () => {
 			jest.fn(),
 		]);
 
-		const { container, getByText, getByRole } = render(
+		const { container, getByText } = render(
 			<I18nextProvider i18n={i18n}>
 				<DashboardProvider>
 					<PreferenceContextProvider>
@@ -305,7 +335,83 @@ describe('Stacking bar in new panel', () => {
 		expect(switchBtn).toBeInTheDocument();
 		expect(switchBtn).toHaveClass('ant-switch-checked');
 
-		// (Optional) More semantic: verify by role
-		expect(getByRole('switch')).toBeChecked();
+		// Check that stack series is present and checked
+		checkStackSeriesState(container, true);
+	});
+});
+
+const STACKING_STATE_ATTR = 'data-stacking-state';
+
+describe('when switching to BAR panel type', () => {
+	jest.setTimeout(10000);
+
+	beforeEach(() => {
+		jest.clearAllMocks();
+
+		// Mock useSearchParams to return the expected values
+		(useSearchParams as jest.Mock).mockReturnValue([
+			new URLSearchParams(MOCK_SEARCH_PARAMS),
+			jest.fn(),
+		]);
+	});
+
+	it('should preserve saved stacking value of true', async () => {
+		const { getByTestId, getByText, container } = render(
+			<DashboardProvider>
+				<NewWidget
+					selectedGraph={PANEL_TYPES.BAR}
+					fillSpans={undefined}
+					yAxisUnit={undefined}
+				/>
+			</DashboardProvider>,
+		);
+
+		expect(getByTestId('panel-change-select')).toHaveAttribute(
+			STACKING_STATE_ATTR,
+			'true',
+		);
+
+		await userEvent.click(getByText('Bar')); // Panel Type Selected
+
+		// find dropdown with - .ant-select-dropdown
+		const panelDropdown = document.querySelector(
+			'.ant-select-dropdown',
+		) as HTMLElement;
+		expect(panelDropdown).toBeInTheDocument();
+
+		// Select TimeSeries from dropdown
+		const option = within(panelDropdown).getByText('Time Series');
+		fireEvent.click(option);
+
+		expect(getByTestId('panel-change-select')).toHaveAttribute(
+			STACKING_STATE_ATTR,
+			'false',
+		);
+
+		// Since we are on timeseries panel, stack series should be false
+		expect(screen.queryByText('Stack series')).not.toBeInTheDocument();
+
+		// switch back to Bar panel
+		const panelTypeDropdown2 = getByTestId('panel-change-select') as HTMLElement;
+		expect(panelTypeDropdown2).toBeInTheDocument();
+
+		expect(getByTextUtil(panelTypeDropdown2, 'Time Series')).toBeInTheDocument();
+		fireEvent.click(getByTextUtil(panelTypeDropdown2, 'Time Series'));
+
+		// find dropdown with - .ant-select-dropdown
+		const panelDropdown2 = document.querySelector(
+			'.ant-select-dropdown',
+		) as HTMLElement;
+		// // Select BAR from dropdown
+		const BarOption = within(panelDropdown2).getByText('Bar');
+		fireEvent.click(BarOption);
+
+		// Stack series should be true
+		checkStackSeriesState(container, true);
+
+		expect(getByTestId('panel-change-select')).toHaveAttribute(
+			STACKING_STATE_ATTR,
+			'true',
+		);
 	});
 });

frontend/src/container/NewWidget/__test__/__mocks__/uplotChartData.ts

@@ -0,0 +1,134 @@
+import { MetricRangePayloadProps } from 'types/api/metrics/getQueryRange';
+
+export const BarNonStackedChartData = {
+	apiResponse: {
+		data: {
+			result: [
+				{
+					metric: {
+						'service.name': 'recommendationservice',
+					},
+					values: [
+						[1758713940, '33.933'],
+						[1758715020, '31.767'],
+					],
+					queryName: 'A',
+					metaData: {
+						alias: '__result_0',
+						index: 0,
+						queryName: 'A',
+					},
+					legend: '',
+				},
+				{
+					metric: {
+						'service.name': 'frontend',
+					},
+					values: [
+						[1758713940, '20.0'],
+						[1758715020, '25.0'],
+					],
+					queryName: 'B',
+					metaData: {
+						alias: '__result_1',
+						index: 1,
+						queryName: 'B',
+					},
+					legend: '',
+				},
+			],
+			resultType: 'time_series',
+			newResult: {
+				data: {
+					resultType: 'time_series',
+					result: [
+						{
+							queryName: 'A',
+							legend: '',
+							series: [
+								{
+									labels: {
+										'service.name': 'recommendationservice',
+									},
+									labelsArray: [
+										{
+											'service.name': 'recommendationservice',
+										},
+									],
+									values: [
+										{
+											timestamp: 1758713940000,
+											value: '33.933',
+										},
+										{
+											timestamp: 1758715020000,
+											value: '31.767',
+										},
+									],
+									metaData: {
+										alias: '__result_0',
+										index: 0,
+										queryName: 'A',
+									},
+								},
+							],
+							predictedSeries: [],
+							upperBoundSeries: [],
+							lowerBoundSeries: [],
+							anomalyScores: [],
+							list: null,
+						},
+						{
+							queryName: 'B',
+							legend: '',
+							series: [
+								{
+									labels: {
+										'service.name': 'frontend',
+									},
+									labelsArray: [
+										{
+											'service.name': 'frontend',
+										},
+									],
+									values: [
+										{
+											timestamp: 1758713940000,
+											value: '20.0',
+										},
+										{
+											timestamp: 1758715020000,
+											value: '25.0',
+										},
+									],
+									metaData: {
+										alias: '__result_1',
+										index: 1,
+										queryName: 'B',
+									},
+								},
+							],
+							predictedSeries: [],
+							upperBoundSeries: [],
+							lowerBoundSeries: [],
+							anomalyScores: [],
+							list: null,
+						},
+					],
+				},
+			},
+		},
+	} as MetricRangePayloadProps,
+	fillSpans: false,
+	stackedBarChart: false,
+};
+
+export const BarStackedChartData = {
+	...BarNonStackedChartData,
+	stackedBarChart: true,
+};
+
+export const TimeSeriesChartData = {
+	...BarNonStackedChartData,
+	stackedBarChart: false,
+};

frontend/src/container/NewWidget/__test__/getUplotChartData.test.ts

@@ -0,0 +1,50 @@
+import { getUPlotChartData } from '../../../lib/uPlotLib/utils/getUplotChartData';
+import {
+	BarNonStackedChartData,
+	BarStackedChartData,
+	TimeSeriesChartData,
+} from './__mocks__/uplotChartData';
+
+describe('getUplotChartData', () => {
+	it('should return the correct chart data for non-stacked bar chart', () => {
+		const result = getUPlotChartData(
+			BarNonStackedChartData.apiResponse,
+			BarNonStackedChartData.fillSpans,
+			BarNonStackedChartData.stackedBarChart,
+		);
+		expect(result).toEqual([
+			[1758713940, 1758715020],
+			[33.933, 31.767],
+			[20.0, 25.0],
+		]);
+	});
+
+	it('should return the correct chart data for stacked bar chart', () => {
+		const result = getUPlotChartData(
+			BarStackedChartData.apiResponse,
+			BarStackedChartData.fillSpans,
+			BarStackedChartData.stackedBarChart,
+		);
+		// For stacked charts, the values should be cumulative
+		// First series: [33.933, 31.767] + [20.0, 25.0] = [53.933, 56.767]
+		// Second series: [20.0, 25.0] (unchanged)
+		expect(result).toHaveLength(3);
+		expect(result[0]).toEqual([1758713940, 1758715020]);
+		expect(result[1][0]).toBeCloseTo(53.933, 3);
+		expect(result[1][1]).toBeCloseTo(56.767, 3);
+		expect(result[2]).toEqual([20.0, 25.0]);
+	});
+
+	it('should return the correct chart data for time series chart', () => {
+		const result = getUPlotChartData(
+			TimeSeriesChartData.apiResponse,
+			TimeSeriesChartData.fillSpans,
+			TimeSeriesChartData.stackedBarChart,
+		);
+		expect(result).toEqual([
+			[1758713940, 1758715020],
+			[33.933, 31.767],
+			[20.0, 25.0],
+		]);
+	});
+});

frontend/src/container/NewWidget/index.tsx

@@ -595,6 +595,13 @@ function NewWidget({
 			selectedGraph,
 		);
 		setGraphType(type);
+
+		// with a single source of truth for stacking, we can use the saved stacking value as a default value
+		const savedStackingValue = getWidget()?.stackedBarChart;
+		setStackedBarChart(
+			type === PANEL_TYPES.BAR ? savedStackingValue || false : false,
+		);
+
 		redirectWithQueryBuilderData(
 			updatedQuery,
 			{ [QueryParams.graphType]: type },

frontend/src/container/NewWidget/utils.ts

@@ -553,7 +553,7 @@ export const getDefaultWidgetData = (
 	timePreferance: 'GLOBAL_TIME',
 	softMax: null,
 	softMin: null,
-	stackedBarChart: true,
+	stackedBarChart: name === PANEL_TYPES.BAR,
 	selectedLogFields: defaultLogsSelectedColumns.map((field) => ({
 		...field,
 		type: field.fieldContext ?? '',

frontend/src/container/PanelWrapper/UplotPanelWrapper.tsx

@@ -124,15 +124,23 @@ function UplotPanelWrapper({
 		queryResponse.data.payload.data.result = sortedSeriesData;
 	}
 
+	const stackedBarChart = useMemo(
+		() =>
+			(selectedGraph
+				? selectedGraph === PANEL_TYPES.BAR
+				: widget?.panelTypes === PANEL_TYPES.BAR) && widget?.stackedBarChart,
+		[selectedGraph, widget?.panelTypes, widget?.stackedBarChart],
+	);
+
 	const chartData = getUPlotChartData(
 		queryResponse?.data?.payload,
 		widget.fillSpans,
-		widget?.stackedBarChart,
+		stackedBarChart,
 		hiddenGraph,
 	);
 
 	useEffect(() => {
-		if (widget.panelTypes === PANEL_TYPES.BAR && widget?.stackedBarChart) {
+		if (widget.panelTypes === PANEL_TYPES.BAR && stackedBarChart) {
 			const graphV = cloneDeep(graphVisibility)?.slice(1);
 			const isSomeSelectedLegend = graphV?.some((v) => v === false);
 			if (isSomeSelectedLegend) {
@@ -145,7 +153,7 @@ function UplotPanelWrapper({
 				}
 			}
 		}
-	}, [graphVisibility, hiddenGraph, widget.panelTypes, widget?.stackedBarChart]);
+	}, [graphVisibility, hiddenGraph, widget.panelTypes, stackedBarChart]);
 
 	const { timezone } = useTimezone();
 
@@ -221,7 +229,7 @@ function UplotPanelWrapper({
 				setGraphsVisibilityStates: setGraphVisibility,
 				panelType: selectedGraph || widget.panelTypes,
 				currentQuery,
-				stackBarChart: widget?.stackedBarChart,
+				stackBarChart: stackedBarChart,
 				hiddenGraph,
 				setHiddenGraph,
 				customTooltipElement,
@@ -261,6 +269,7 @@ function UplotPanelWrapper({
 			enableDrillDown,
 			onClickHandler,
 			widget,
+			stackedBarChart,
 		],
 	);
 
@@ -274,14 +283,14 @@ function UplotPanelWrapper({
 				items={menuItemsConfig.items}
 				onClose={onClose}
 			/>
-			{widget?.stackedBarChart && isFullViewMode && (
+			{stackedBarChart && isFullViewMode && (
 				<Alert
 					message="Selecting multiple legends is currently not supported in case of stacked bar charts"
 					type="info"
 					className="info-text"
 				/>
 			)}
-			{isFullViewMode && setGraphVisibility && !widget?.stackedBarChart && (
+			{isFullViewMode && setGraphVisibility && !stackedBarChart && (
 				<GraphManager
 					data={getUPlotChartData(queryResponse?.data?.payload, widget.fillSpans)}
 					name={widget.id}