[Vis Builder] Add field summary popovers

Much of the functionality was ported from `Discover`, but
largely refactored.

* Add utilities to get sampled hit summaries by field
* Add popover summaries
* Slight refactor of special `Count` pseudofield
* Use observable subscription to update sampled hits

Fixes #950

Signed-off-by: Josh Romero <rmerqg@amazon.com>

CHANGELOG.md

@@ -34,6 +34,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - [Vis Builder] Rename wizard on save modal and visualization table ([#2645](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2645))
 - Change save object type, wizard id and name to visBuilder #2673 ([#2673](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2673))
 - Add extension point in saved object management to register namespaces and show filter ([#2656](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2656))
+- [Vis Builder] Add field summary popovers ([#2682](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2682))
 
 ### 🐛 Bug Fixes
 
@@ -49,7 +50,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - [Multi DataSource] Address UX comments on index pattern management stack ([#2611](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2611))
 - [Multi DataSource] Apply get indices error handling in step index pattern ([#2652](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2652))
 - [Vis Builder] Last Updated Timestamp for visbuilder savedobject is getting Generated ([#2628](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2628))
-- Removed Leftover X Pack references ([#2638](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2638)) 
+- Removed Leftover X Pack references ([#2638](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2638))
 
 ### 🚞 Infrastructure
 

src/core/public/mocks.ts

@@ -83,6 +83,7 @@ function createCoreSetupMock({
     uiSettings: uiSettingsServiceMock.createSetupContract(),
     injectedMetadata: {
       getInjectedVar: injectedMetadataServiceMock.createSetupContract().getInjectedVar,
+      getBranding: injectedMetadataServiceMock.createSetupContract().getBranding,
     },
   };
 

src/plugins/vis_builder/public/application/components/data_tab/field_bucket.scss

@@ -0,0 +1,4 @@
+.vbFieldDetails__barContainer {
+  // Constrains value to the flex item, and allows for truncation when necessary
+  min-width: 0;
+}

src/plugins/vis_builder/public/application/components/data_tab/field_bucket.tsx

@@ -0,0 +1,114 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import React from 'react';
+import {
+  EuiText,
+  EuiButtonIcon,
+  EuiFlexGroup,
+  EuiFlexItem,
+  EuiSpacer,
+  EuiProgress,
+} from '@elastic/eui';
+import { i18n } from '@osd/i18n';
+
+import { IndexPatternField } from '../../../../../data/public';
+
+import { Bucket } from './types';
+import './field_bucket.scss';
+
+interface Props {
+  bucket: Bucket;
+  field: IndexPatternField;
+  onAddFilter: (field: IndexPatternField | string, value: string, type: '+' | '-') => void;
+}
+
+export function VisBuilderFieldBucket({ bucket, field, onAddFilter }: Props) {
+  const { count, display, percent, value } = bucket;
+  const { filterable: isFilterableField, name: fieldName } = field;
+
+  const emptyTxt = i18n.translate('visBuilder.fieldChooser.detailViews.emptyStringText', {
+    // We need this to communicate to users when a top value is actually an empty string
+    defaultMessage: 'Empty string',
+  });
+  const addLabel = i18n.translate(
+    'visBuilder.fieldChooser.detailViews.filterValueButtonAriaLabel',
+    {
+      defaultMessage: 'Filter for {fieldName}: "{value}"',
+      values: { fieldName, value },
+    }
+  );
+  const removeLabel = i18n.translate(
+    'visBuilder.fieldChooser.detailViews.filterOutValueButtonAriaLabel',
+    {
+      defaultMessage: 'Filter out {fieldName}: "{value}"',
+      values: { fieldName, value },
+    }
+  );
+
+  const displayValue = display || emptyTxt;
+
+  return (
+    <>
+      <EuiFlexGroup justifyContent="spaceBetween" responsive={false} gutterSize="s">
+        <EuiFlexItem className="vbFieldDetails__barContainer" grow={1}>
+          <EuiFlexGroup justifyContent="spaceBetween" gutterSize="xs" responsive={false}>
+            <EuiFlexItem grow={1} className="eui-textTruncate">
+              <EuiText
+                title={`${displayValue}: ${count} (${percent.toFixed(1)}%)`}
+                size="xs"
+                className="eui-textTruncate"
+              >
+                {displayValue}
+              </EuiText>
+            </EuiFlexItem>
+            <EuiFlexItem grow={false} className="eui-textTruncate">
+              <EuiText color="secondary" size="xs" className="eui-textTruncate">
+                {percent.toFixed(1)}%
+              </EuiText>
+            </EuiFlexItem>
+          </EuiFlexGroup>
+          <StringFieldProgressBar value={value} percent={percent} count={count} />
+        </EuiFlexItem>
+        {/* TODO: Should we have any explanation for non-filterable fields? */}
+        {isFilterableField && (
+          <EuiFlexItem grow={false}>
+            <div>
+              <EuiButtonIcon
+                className="vbFieldDetails__filterButton"
+                iconSize="s"
+                iconType="plusInCircle"
+                onClick={() => onAddFilter(field, value, '+')}
+                aria-label={addLabel}
+                data-test-subj={`plus-${fieldName}-${value}`}
+              />
+              <EuiButtonIcon
+                className="vbFieldDetails__filterButton"
+                iconSize="s"
+                iconType="minusInCircle"
+                onClick={() => onAddFilter(field, value, '-')}
+                aria-label={removeLabel}
+                data-test-subj={`minus-${fieldName}-${value}`}
+              />
+            </div>
+          </EuiFlexItem>
+        )}
+      </EuiFlexGroup>
+      <EuiSpacer size="s" />
+    </>
+  );
+}
+
+export function StringFieldProgressBar({
+  value,
+  percent,
+  count,
+}: Pick<Bucket, 'count' | 'percent' | 'value'>) {
+  const ariaLabel = `${value}: ${count} (${percent}%)`;
+
+  return (
+    <EuiProgress value={percent} max={100} color="secondary" aria-label={ariaLabel} size="s" />
+  );
+}

src/plugins/vis_builder/public/application/components/data_tab/field_details.test.tsx

@@ -0,0 +1,178 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ * Any modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import React from 'react';
+// @ts-ignore
+import { findTestSubject } from '@elastic/eui/lib/test';
+// @ts-ignore
+import stubbedLogstashFields from 'fixtures/logstash_fields';
+// @ts-ignore
+import { mountWithIntl, nextTick } from 'test_utils/enzyme_helpers';
+
+import { IndexPatternField } from '../../../../../data/public';
+
+import { VisBuilderFieldDetails } from './field_details';
+
+const mockOnAddFilter = jest.fn();
+
+describe('visBuilder sidebar field details', function () {
+  const defaultProps = {
+    isMetaField: false,
+    details: { buckets: [], error: '', exists: 1, total: 1, columns: [] },
+    onAddFilter: mockOnAddFilter,
+  };
+
+  function mountComponent(field: IndexPatternField, props?: Record<string, any>) {
+    const compProps = { ...defaultProps, ...props, field };
+    return mountWithIntl(<VisBuilderFieldDetails {...compProps} />);
+  }
+
+  it('should render buckets if they exist', async function () {
+    const field = new IndexPatternField(
+      {
+        name: 'bytes',
+        type: 'number',
+        esTypes: ['long'],
+        count: 10,
+        scripted: false,
+        searchable: true,
+        aggregatable: true,
+        readFromDocValues: true,
+      },
+      'bytes'
+    );
+    const buckets = [1, 2, 3].map((n) => ({
+      display: `display-${n}`,
+      value: `value-${n}`,
+      percent: 25,
+      count: 100,
+    }));
+    const comp = mountComponent(field, {
+      details: { ...defaultProps.details, buckets },
+    });
+    expect(findTestSubject(comp, 'fieldDetailsContainer').length).toBe(1);
+    expect(findTestSubject(comp, 'fieldDetailsError').length).toBe(0);
+    expect(findTestSubject(comp, 'fieldDetailsBucketsContainer').length).toBe(1);
+    expect(findTestSubject(comp, 'fieldDetailsBucketsContainer').children().length).toBe(
+      buckets.length
+    );
+    expect(findTestSubject(comp, 'fieldDetailsExistsLink').length).toBe(1);
+  });
+
+  it('should only render buckets if they exist', async function () {
+    const field = new IndexPatternField(
+      {
+        name: 'bytes',
+        type: 'number',
+        esTypes: ['long'],
+        count: 10,
+        scripted: false,
+        searchable: true,
+        aggregatable: true,
+        readFromDocValues: true,
+      },
+      'bytes'
+    );
+    const comp = mountComponent(field);
+    expect(findTestSubject(comp, 'fieldDetailsContainer').length).toBe(1);
+    expect(findTestSubject(comp, 'fieldDetailsError').length).toBe(0);
+    expect(findTestSubject(comp, 'fieldDetailsBucketsContainer').length).toBe(1);
+    expect(findTestSubject(comp, 'fieldDetailsBucketsContainer').children().length).toBe(0);
+    expect(findTestSubject(comp, 'fieldDetailsExistsLink').length).toBe(1);
+  });
+
+  it('should render a details error', async function () {
+    const field = new IndexPatternField(
+      {
+        name: 'bytes',
+        type: 'number',
+        esTypes: ['long'],
+        count: 10,
+        scripted: false,
+        searchable: true,
+        aggregatable: true,
+        readFromDocValues: true,
+      },
+      'bytes'
+    );
+    const errText = 'Some error';
+    const comp = mountComponent(field, {
+      details: { ...defaultProps.details, error: errText },
+    });
+    expect(findTestSubject(comp, 'fieldDetailsContainer').length).toBe(1);
+    expect(findTestSubject(comp, 'fieldDetailsBucketsContainer').children().length).toBe(0);
+    expect(findTestSubject(comp, 'fieldDetailsError').length).toBe(1);
+    expect(findTestSubject(comp, 'fieldDetailsError').text()).toBe(errText);
+    expect(findTestSubject(comp, 'fieldDetailsExistsLink').length).toBe(0);
+  });
+
+  it('should not render an exists filter link for scripted fields', async function () {
+    const field = new IndexPatternField(
+      {
+        name: 'bytes',
+        type: 'number',
+        esTypes: ['long'],
+        count: 10,
+        scripted: true,
+        searchable: true,
+        aggregatable: true,
+        readFromDocValues: true,
+      },
+      'bytes'
+    );
+    const comp = mountComponent(field);
+    expect(findTestSubject(comp, 'fieldDetailsContainer').length).toBe(1);
+    expect(findTestSubject(comp, 'fieldDetailsError').length).toBe(0);
+    expect(findTestSubject(comp, 'fieldDetailsExistsLink').length).toBe(0);
+  });
+
+  it('should not render an exists filter link for meta fields', async function () {
+    const field = new IndexPatternField(
+      {
+        name: 'bytes',
+        type: 'number',
+        esTypes: ['long'],
+        count: 10,
+        scripted: true,
+        searchable: true,
+        aggregatable: true,
+        readFromDocValues: true,
+      },
+      'bytes'
+    );
+    const comp = mountComponent(field, {
+      ...defaultProps,
+      isMetaField: true,
+    });
+    expect(findTestSubject(comp, 'fieldDetailsContainer').length).toBe(1);
+    expect(findTestSubject(comp, 'fieldDetailsError').length).toBe(0);
+    expect(findTestSubject(comp, 'fieldDetailsExistsLink').length).toBe(0);
+  });
+});