[Maps] top term percentage field property (#59386)

* [Maps] top term percentage property

* populate percentage in feature properties

* TS work

* clean up TS

* fix all type errors

* unit test for esAggFieldsFactory

* clean up

* i18n cleanup

* do not show decimal place for perentage

* fix jest expects

* fix eslint errors

* tslint errors

* handle empty top bucket aggregation

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Author: nreese

x-pack/legacy/plugins/maps/common/constants.ts

@@ -55,10 +55,10 @@ export const ES_SEARCH = 'ES_SEARCH';
 export const ES_PEW_PEW = 'ES_PEW_PEW';
 export const EMS_XYZ = 'EMS_XYZ'; // identifies a custom TMS source. Name is a little unfortunate.
 
-export const FIELD_ORIGIN = {
-  SOURCE: 'source',
-  JOIN: 'join',
-};
+export enum FIELD_ORIGIN {
+  SOURCE = 'source',
+  JOIN = 'join',
+}
 
 export const SOURCE_DATA_ID_ORIGIN = 'source';
 export const META_ID_ORIGIN_SUFFIX = 'meta';
@@ -139,6 +139,8 @@ export enum GRID_RESOLUTION {
   MOST_FINE = 'MOST_FINE',
 }
 
+export const TOP_TERM_PERCENTAGE_SUFFIX = '__percentage';
+
 export const COUNT_PROP_LABEL = i18n.translate('xpack.maps.aggs.defaultCountLabel', {
   defaultMessage: 'count',
 });

x-pack/legacy/plugins/maps/common/descriptor_types.d.ts

@@ -40,8 +40,8 @@ export type AbstractESAggDescriptor = AbstractESSourceDescriptor & {
 };
 
 export type ESGeoGridSourceDescriptor = AbstractESAggDescriptor & {
-  requestType: RENDER_AS;
-  resolution: GRID_RESOLUTION;
+  requestType?: RENDER_AS;
+  resolution?: GRID_RESOLUTION;
 };
 
 export type ESSearchSourceDescriptor = AbstractESSourceDescriptor & {

x-pack/legacy/plugins/maps/public/layers/fields/es_agg_field.js

@@ -0,0 +1,80 @@
+/*
+ * 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 { ESAggField, esAggFieldsFactory } from './es_agg_field';
+import { AGG_TYPE, FIELD_ORIGIN } from '../../../common/constants';
+import { IESAggSource } from '../sources/es_agg_source';
+import { IIndexPattern } from 'src/plugins/data/public';
+
+const mockIndexPattern = {
+  title: 'wildIndex',
+  fields: [
+    {
+      name: 'foo*',
+    },
+  ],
+} as IIndexPattern;
+
+const mockEsAggSource = {
+  getAggKey: (aggType: AGG_TYPE, fieldName: string) => {
+    return 'agg_key';
+  },
+  getAggLabel: (aggType: AGG_TYPE, fieldName: string) => {
+    return 'agg_label';
+  },
+  getIndexPattern: async () => {
+    return mockIndexPattern;
+  },
+} as IESAggSource;
+
+const defaultParams = {
+  label: 'my agg field',
+  source: mockEsAggSource,
+  aggType: AGG_TYPE.COUNT,
+  origin: FIELD_ORIGIN.SOURCE,
+};
+
+describe('supportsFieldMeta', () => {
+  test('Non-counting aggregations should support field meta', () => {
+    const avgMetric = new ESAggField({ ...defaultParams, aggType: AGG_TYPE.AVG });
+    expect(avgMetric.supportsFieldMeta()).toBe(true);
+    const maxMetric = new ESAggField({ ...defaultParams, aggType: AGG_TYPE.MAX });
+    expect(maxMetric.supportsFieldMeta()).toBe(true);
+    const minMetric = new ESAggField({ ...defaultParams, aggType: AGG_TYPE.MIN });
+    expect(minMetric.supportsFieldMeta()).toBe(true);
+    const termsMetric = new ESAggField({ ...defaultParams, aggType: AGG_TYPE.TERMS });
+    expect(termsMetric.supportsFieldMeta()).toBe(true);
+  });
+
+  test('Counting aggregations should not support field meta', () => {
+    const countMetric = new ESAggField({ ...defaultParams, aggType: AGG_TYPE.COUNT });
+    expect(countMetric.supportsFieldMeta()).toBe(false);
+    const sumMetric = new ESAggField({ ...defaultParams, aggType: AGG_TYPE.SUM });
+    expect(sumMetric.supportsFieldMeta()).toBe(false);
+    const uniqueCountMetric = new ESAggField({ ...defaultParams, aggType: AGG_TYPE.UNIQUE_COUNT });
+    expect(uniqueCountMetric.supportsFieldMeta()).toBe(false);
+  });
+});
+
+describe('esAggFieldsFactory', () => {
+  test('Should only create top terms field when term field is not provided', () => {
+    const fields = esAggFieldsFactory(
+      { type: AGG_TYPE.TERMS },
+      mockEsAggSource,
+      FIELD_ORIGIN.SOURCE
+    );
+    expect(fields.length).toBe(1);
+  });
+
+  test('Should create top terms and top terms percentage fields', () => {
+    const fields = esAggFieldsFactory(
+      { type: AGG_TYPE.TERMS, field: 'myField' },
+      mockEsAggSource,
+      FIELD_ORIGIN.SOURCE
+    );
+    expect(fields.length).toBe(2);
+  });
+});