feat(plugin-chart-echarts): add Gantt Chart plugin (#33716)

superset-frontend/plugins/plugin-chart-echarts/src/utils/series.ts

@@ -685,3 +685,20 @@ export function extractTooltipKeys(
   }
   return [forecastValue[0][TOOLTIP_SERIES_KEY]];
 }
+
+export function groupData(data: DataRecord[], by?: string | null) {
+  const seriesMap: Map<DataRecordValue | undefined, DataRecord[]> = new Map();
+  if (by) {
+    data.forEach(datum => {
+      const value = seriesMap.get(datum[by]);
+      if (value) {
+        value.push(datum);
+      } else {
+        seriesMap.set(datum[by], [datum]);
+      }
+    });
+  } else {
+    seriesMap.set(undefined, data);
+  }
+  return seriesMap;
+}

superset-frontend/plugins/plugin-chart-echarts/src/utils/tooltip.ts

@@ -18,6 +18,12 @@
  */
 
 import type { CallbackDataParams } from 'echarts/types/src/util/types';
+import {
+  QueryFormColumn,
+  QueryFormMetric,
+  getColumnLabel,
+  getMetricLabel,
+} from '@superset-ui/core';
 import { TOOLTIP_OVERFLOW_MARGIN, TOOLTIP_POINTER_MARGIN } from '../constants';
 import { Refs } from '../types';
 
@@ -80,3 +86,16 @@ export function getDefaultTooltip(refs: Refs) {
     },
   };
 }
+
+export function getTooltipLabels({
+  tooltipMetrics,
+  tooltipColumns,
+}: {
+  tooltipMetrics?: QueryFormMetric[];
+  tooltipColumns?: QueryFormColumn[];
+}) {
+  return [
+    ...(tooltipMetrics ?? []).map(v => getMetricLabel(v)),
+    ...(tooltipColumns ?? []).map(v => getColumnLabel(v)),
+  ];
+}