[XY] Add minTimeBarInterval arg

src/plugins/chart_expressions/expression_xy/common/expression_functions/common_xy_args.ts

@@ -128,4 +128,8 @@ export const commonXYArgs: CommonXYFn['args'] = {
     types: ['string'],
     help: strings.getAriaLabelHelp(),
   },
+  minTimeBarInterval: {
+    types: ['string'],
+    help: strings.getMinTimeBarIntervalHelp(),
+  },
 };

src/plugins/chart_expressions/expression_xy/common/expression_functions/layered_xy_vis_fn.ts

@@ -7,15 +7,20 @@
  */
 
 import { XY_VIS_RENDERER } from '../constants';
-import { appendLayerIds } from '../helpers';
+import { appendLayerIds, getDataLayers } from '../helpers';
 import { LayeredXyVisFn } from '../types';
 import { logDatatables } from '../utils';
+import { validateMinTimeBarInterval, hasBarLayer } from './validate';
 
 export const layeredXyVisFn: LayeredXyVisFn['fn'] = async (data, args, handlers) => {
   const layers = appendLayerIds(args.layers ?? [], 'layers');
 
   logDatatables(layers, handlers);
 
+  const dataLayers = getDataLayers(layers);
+  const hasBar = hasBarLayer(dataLayers);
+  validateMinTimeBarInterval(dataLayers, hasBar, args.minTimeBarInterval);
+
   return {
     type: 'render',
     as: XY_VIS_RENDERER,

src/plugins/chart_expressions/expression_xy/common/expression_functions/validate.ts

@@ -7,13 +7,16 @@
  */
 
 import { i18n } from '@kbn/i18n';
+import { isValidInterval } from '@kbn/data-plugin/common';
 import { AxisExtentModes, ValueLabelModes } from '../constants';
 import {
   AxisExtentConfigResult,
   DataLayerConfigResult,
+  CommonXYDataLayerConfigResult,
   ValueLabelMode,
   CommonXYDataLayerConfig,
 } from '../types';
+import { isTimeChart } from '../helpers';
 
 const errors = {
   extendBoundsAreInvalidError: () =>
@@ -37,6 +40,18 @@ const errors = {
     i18n.translate('expressionXY.reusable.function.xyVis.errors.dataBoundsForNotLineChartError', {
       defaultMessage: 'Only line charts can be fit to the data bounds',
     }),
+  isInvalidIntervalError: () =>
+    i18n.translate('expressionXY.reusable.function.xyVis.errors.isInvalidIntervalError', {
+      defaultMessage:
+        'Provided x-axis interval is invalid. The interval should include quantity and unit names. Examples: 1d, 24h, 1w.',
+    }),
+  minTimeBarIntervalNotForTimeBarChartError: () =>
+    i18n.translate(
+      'expressionXY.reusable.function.xyVis.errors.minTimeBarIntervalNotForTimeBarChartError',
+      {
+        defaultMessage: '`minTimeBarInterval` argument is applicable only for time bar charts.',
+      }
+    ),
 };
 
 export const hasBarLayer = (layers: Array<DataLayerConfigResult | CommonXYDataLayerConfig>) =>
@@ -101,3 +116,19 @@ export const validateValueLabels = (
     throw new Error(errors.valueLabelsForNotBarsOrHistogramBarsChartsError());
   }
 };
+
+export const validateMinTimeBarInterval = (
+  dataLayers: CommonXYDataLayerConfigResult[],
+  hasBar: boolean,
+  minTimeBarInterval?: string
+) => {
+  if (minTimeBarInterval) {
+    if (!isValidInterval(minTimeBarInterval)) {
+      throw new Error(errors.isInvalidIntervalError());
+    }
+
+    if (!hasBar || !isTimeChart(dataLayers)) {
+      throw new Error(errors.minTimeBarIntervalNotForTimeBarChartError());
+    }
+  }
+};

src/plugins/chart_expressions/expression_xy/common/expression_functions/xy_vis.test.ts

@@ -50,6 +50,44 @@ describe('xyVis', () => {
     });
   });
 
+  test('it should throw error if minTimeBarInterval is invalid', async () => {
+    const { data, args } = sampleArgs();
+    const { layers, ...rest } = args;
+    const { layerId, layerType, table, type, ...restLayerArgs } = sampleLayer;
+    expect(
+      xyVisFunction.fn(
+        data,
+        {
+          ...rest,
+          ...restLayerArgs,
+          minTimeBarInterval: '1q',
+          referenceLineLayers: [],
+          annotationLayers: [],
+        },
+        createMockExecutionContext()
+      )
+    ).rejects.toThrowErrorMatchingSnapshot();
+  });
+
+  test('it should throw error if minTimeBarInterval applied for not time bar chart', async () => {
+    const { data, args } = sampleArgs();
+    const { layers, ...rest } = args;
+    const { layerId, layerType, table, type, ...restLayerArgs } = sampleLayer;
+    expect(
+      xyVisFunction.fn(
+        data,
+        {
+          ...rest,
+          ...restLayerArgs,
+          minTimeBarInterval: '1h',
+          referenceLineLayers: [],
+          annotationLayers: [],
+        },
+        createMockExecutionContext()
+      )
+    ).rejects.toThrowErrorMatchingSnapshot();
+  });
+
   test('it should throw error if splitRowAccessor is pointing to the absent column', async () => {
     const { data, args } = sampleArgs();
     const { layers, ...rest } = args;

src/plugins/chart_expressions/expression_xy/common/expression_functions/xy_vis_fn.ts

@@ -24,6 +24,7 @@ import {
   validateExtent,
   validateFillOpacity,
   validateValueLabels,
+  validateMinTimeBarInterval,
 } from './validate';
 
 const createDataLayer = (args: XYArgs, table: Datatable): DataLayerConfigResult => {
@@ -99,6 +100,7 @@ export const xyVisFn: XyVisFn['fn'] = async (data, args, handlers) => {
   validateExtent(args.yLeftExtent, hasBar || hasArea, dataLayers);
   validateExtent(args.yRightExtent, hasBar || hasArea, dataLayers);
   validateFillOpacity(args.fillOpacity, hasArea);
+  validateMinTimeBarInterval(dataLayers, hasBar, args.minTimeBarInterval);
 
   const hasNotHistogramBars = !hasHistogramBarLayer(dataLayers);
 

src/plugins/chart_expressions/expression_xy/common/helpers/index.ts

@@ -6,5 +6,6 @@
  * Side Public License, v 1.
  */
 
-export { appendLayerIds, getAccessors } from './layers';
+export { appendLayerIds, getDataLayers, getAccessors } from './layers';
+export { isTimeChart } from './visualization';
 export { normalizeTable } from './table';

src/plugins/chart_expressions/expression_xy/common/helpers/layers.test.ts

@@ -6,7 +6,8 @@
  * Side Public License, v 1.
  */
 
-import { generateLayerId, appendLayerIds } from './layers';
+import { XYExtendedLayerConfigResult } from '../types';
+import { generateLayerId, appendLayerIds, getDataLayers } from './layers';
 
 describe('#generateLayerId', () => {
   it('should return the combination of keyword and index', () => {
@@ -47,3 +48,28 @@ describe('#appendLayerIds', () => {
     expect(layersWithIds).toStrictEqual(expectedLayerIds);
   });
 });
+
+describe('#getDataLayers', () => {
+  it('should return only data layers', () => {
+    const layers: XYExtendedLayerConfigResult[] = [
+      {
+        type: 'extendedDataLayer',
+        layerType: 'data',
+        accessors: ['y'],
+        seriesType: 'bar',
+        xScaleType: 'time',
+        isHistogram: false,
+        table: { rows: [], columns: [], type: 'datatable' },
+        palette: { type: 'system_palette', name: 'system' },
+      },
+      {
+        type: 'extendedReferenceLineLayer',
+        layerType: 'referenceLine',
+        accessors: ['y'],
+        table: { rows: [], columns: [], type: 'datatable' },
+      },
+    ];
+
+    expect(getDataLayers(layers)).toStrictEqual([layers[0]]);
+  });
+});

src/plugins/chart_expressions/expression_xy/common/helpers/layers.ts

@@ -7,7 +7,8 @@
  */
 
 import { Datatable, PointSeriesColumnNames } from '@kbn/expressions-plugin/common';
-import { WithLayerId } from '../types';
+import { WithLayerId, ExtendedDataLayerConfig, XYExtendedLayerConfigResult } from '../types';
+import { LayerTypes } from '../constants';
 
 function isWithLayerId<T>(layer: T): layer is T & WithLayerId {
   return (layer as T & WithLayerId).layerId ? true : false;
@@ -27,6 +28,13 @@ export function appendLayerIds<T>(
     }));
 }
 
+export function getDataLayers(layers: XYExtendedLayerConfigResult[]) {
+  return layers.filter<ExtendedDataLayerConfig>(
+    (layer): layer is ExtendedDataLayerConfig =>
+      layer.layerType === LayerTypes.DATA || !layer.layerType
+  );
+}
+
 export function getAccessors<T, U extends { splitAccessor?: T; xAccessor?: T; accessors: T[] }>(
   args: U,
   table: Datatable

src/plugins/chart_expressions/expression_xy/common/helpers/visualization.test.ts

@@ -0,0 +1,51 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { CommonXYDataLayerConfigResult } from '../types';
+import { isTimeChart } from './visualization';
+
+describe('#isTimeChart', () => {
+  it('should return true if all data layers have xAccessor collumn type `date` and scaleType is `time`', () => {
+    const layers: CommonXYDataLayerConfigResult[] = [
+      {
+        type: 'extendedDataLayer',
+        layerType: 'data',
+        xAccessor: 'x',
+        accessors: ['y'],
+        seriesType: 'bar',
+        xScaleType: 'time',
+        isHistogram: false,
+        table: {
+          rows: [],
+          columns: [
+            {
+              id: 'x',
+              name: 'x',
+              meta: {
+                type: 'date',
+              },
+            },
+          ],
+          type: 'datatable',
+        },
+        palette: { type: 'system_palette', name: 'system' },
+      },
+    ];
+
+    expect(isTimeChart(layers)).toBeTruthy();
+
+    layers[0].xScaleType = 'linear';
+
+    expect(isTimeChart(layers)).toBeFalsy();
+
+    layers[0].xScaleType = 'time';
+    layers[0].table.columns[0].meta.type = 'number';
+
+    expect(isTimeChart(layers)).toBeFalsy();
+  });
+});

src/plugins/chart_expressions/expression_xy/common/helpers/visualization.ts

@@ -0,0 +1,18 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { XScaleTypes } from '../constants';
+import { CommonXYDataLayerConfigResult } from '../types';
+
+export function isTimeChart(layers: CommonXYDataLayerConfigResult[]) {
+  return layers.every<CommonXYDataLayerConfigResult>(
+    (l): l is CommonXYDataLayerConfigResult =>
+      l.table.columns.find((col) => col.id === l.xAccessor)?.meta.type === 'date' &&
+      l.xScaleType === XScaleTypes.TIME
+  );
+}

src/plugins/chart_expressions/expression_xy/common/i18n/index.tsx

@@ -121,6 +121,10 @@ export const strings = {
     i18n.translate('expressionXY.xyVis.ariaLabel.help', {
       defaultMessage: 'Specifies the aria label of the xy chart',
     }),
+  getMinTimeBarIntervalHelp: () =>
+    i18n.translate('expressionXY.xyVis.xAxisInterval.help', {
+      defaultMessage: 'Specifies the min interval for time bar chart',
+    }),
   getSplitColumnAccessorHelp: () =>
     i18n.translate('expressionXY.xyVis.splitColumnAccessor.help', {
       defaultMessage: 'Specifies split column of the xy chart',

src/plugins/chart_expressions/expression_xy/common/types/expression_functions.ts

@@ -203,6 +203,7 @@ export interface XYArgs extends DataLayerArgs {
   hideEndzones?: boolean;
   valuesInLegend?: boolean;
   ariaLabel?: string;
+  minTimeBarInterval?: string;
   splitRowAccessor?: ExpressionValueVisDimension | string;
   splitColumnAccessor?: ExpressionValueVisDimension | string;
 }
@@ -230,6 +231,7 @@ export interface LayeredXYArgs {
   hideEndzones?: boolean;
   valuesInLegend?: boolean;
   ariaLabel?: string;
+  minTimeBarInterval?: string;
 }
 
 export interface XYProps {
@@ -255,6 +257,7 @@ export interface XYProps {
   hideEndzones?: boolean;
   valuesInLegend?: boolean;
   ariaLabel?: string;
+  minTimeBarInterval?: string;
   splitRowAccessor?: ExpressionValueVisDimension | string;
   splitColumnAccessor?: ExpressionValueVisDimension | string;
 }

src/plugins/chart_expressions/expression_xy/public/helpers/interval.test.ts

@@ -86,4 +86,18 @@ describe('calculateMinInterval', () => {
     const result = await calculateMinInterval(xyProps);
     expect(result).toEqual(undefined);
   });
+
+  it('should return specified interval if user provided it as `xAxisInterval`', async () => {
+    layer.table.columns[2].meta.source = 'esaggs';
+    layer.table.columns[2].meta.sourceParams = {
+      type: 'date_histogram',
+      params: {
+        used_interval: '5m',
+      },
+    };
+    xyProps.args.layers[0] = layer;
+    xyProps.args.minTimeBarInterval = '1h';
+    const result = await calculateMinInterval(xyProps);
+    expect(result).toEqual(60 * 60 * 1000);
+  });
 });

src/plugins/chart_expressions/expression_xy/public/helpers/interval.ts

@@ -12,7 +12,7 @@ import { XYChartProps } from '../../common';
 import { getFilteredLayers } from './layers';
 import { isDataLayer } from './visualization';
 
-export function calculateMinInterval({ args: { layers } }: XYChartProps) {
+export function calculateMinInterval({ args: { layers, minTimeBarInterval } }: XYChartProps) {
   const filteredLayers = getFilteredLayers(layers);
   if (filteredLayers.length === 0) return;
   const isTimeViz = filteredLayers.every((l) => isDataLayer(l) && l.xScaleType === 'time');
@@ -22,6 +22,9 @@ export function calculateMinInterval({ args: { layers } }: XYChartProps) {
     getColumnByAccessor(filteredLayers[0].xAccessor, filteredLayers[0].table.columns);
 
   if (!xColumn) return;
+  if (minTimeBarInterval) {
+    return search.aggs.parseInterval(minTimeBarInterval)?.as('milliseconds');
+  }
   if (!isTimeViz) {
     const histogramInterval = search.aggs.getNumberHistogramIntervalByDatatableColumn(xColumn);
     if (typeof histogramInterval === 'number') {