[AO] Add threshold information to the metric threshold alert details …

…page (#155493)

Closes #153740, closes #153833, closes #155593

This PR adds threshold information and rule name to the metric threshold
alert details page.


![image](https://user-images.githubusercontent.com/12370520/233968325-8a66166b-2534-4b9b-9054-9085270db5f6.png)


## 🧪 How to test
- Add xpack.observability.unsafe.alertDetails.metrics.enabled: true to
the Kibana config
- Create a metric threshold rule with multiple conditions that generates
an alert
- Go to the alert details page and check threshold information
- Click on the rule link; it should send you to the rule page

x-pack/plugins/infra/common/alerting/metrics/metric_value_formatter.test.ts

@@ -0,0 +1,27 @@
+/*
+ * 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; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { metricValueFormatter } from './metric_value_formatter';
+
+describe('metricValueFormatter', () => {
+  const testData = [
+    { value: null, metric: undefined, result: '[NO DATA]' },
+    { value: null, metric: 'system.cpu.user.pct', result: '[NO DATA]' },
+    { value: 50, metric: undefined, result: '50' },
+    { value: 0.7, metric: 'system.cpu.user.pct', result: '70%' },
+    { value: 0.7012345, metric: 'system.cpu.user.pct', result: '70.1%' },
+    { value: 208, metric: 'system.cpu.user.ticks', result: '208' },
+    { value: 0.8, metric: 'system.cpu.user.ticks', result: '0.8' },
+  ];
+
+  it.each(testData)(
+    'metricValueFormatter($value, $metric) = $result',
+    ({ value, metric, result }) => {
+      expect(metricValueFormatter(value, metric)).toBe(result);
+    }
+  );
+});

x-pack/plugins/infra/common/alerting/metrics/metric_value_formatter.ts

@@ -0,0 +1,21 @@
+/*
+ * 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; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { i18n } from '@kbn/i18n';
+import { createFormatter } from '../../formatters';
+
+export const metricValueFormatter = (value: number | null, metric: string = '') => {
+  const noDataValue = i18n.translate('xpack.infra.metrics.alerting.noDataFormattedValue', {
+    defaultMessage: '[NO DATA]',
+  });
+
+  const formatter = metric.endsWith('.pct')
+    ? createFormatter('percent')
+    : createFormatter('highPrecision');
+
+  return value == null ? noDataValue : formatter(value);
+};

x-pack/plugins/infra/public/alerting/metric_threshold/components/alert_details_app_section.test.tsx

@@ -6,6 +6,8 @@
  */
 
 import React from 'react';
+import { EuiLink } from '@elastic/eui';
+import { chartPluginMock } from '@kbn/charts-plugin/public/mocks';
 import { coreMock as mockCoreMock } from '@kbn/core/public/mocks';
 import { __IntlProvider as IntlProvider } from '@kbn/i18n-react';
 import { render } from '@testing-library/react';
@@ -17,6 +19,8 @@ import {
 import { AlertDetailsAppSection } from './alert_details_app_section';
 import { ExpressionChart } from './expression_chart';
 
+const mockedChartStartContract = chartPluginMock.createStartContract();
+
 jest.mock('@kbn/observability-alert-details', () => ({
   AlertAnnotation: () => {},
   AlertActiveTimeRangeAnnotation: () => {},
@@ -32,7 +36,10 @@ jest.mock('./expression_chart', () => ({
 
 jest.mock('../../../hooks/use_kibana', () => ({
   useKibanaContextForPlugin: () => ({
-    services: mockCoreMock.createStart(),
+    services: {
+      ...mockCoreMock.createStart(),
+      charts: mockedChartStartContract,
+    },
   }),
 }));
 
@@ -46,23 +53,48 @@ jest.mock('../../../containers/metrics_source/source', () => ({
 
 describe('AlertDetailsAppSection', () => {
   const queryClient = new QueryClient();
+  const mockedSetAlertSummaryFields = jest.fn();
+  const ruleLink = 'ruleLink';
   const renderComponent = () => {
     return render(
       <IntlProvider locale="en">
         <QueryClientProvider client={queryClient}>
           <AlertDetailsAppSection
             alert={buildMetricThresholdAlert()}
             rule={buildMetricThresholdRule()}
+            ruleLink={ruleLink}
+            setAlertSummaryFields={mockedSetAlertSummaryFields}
           />
         </QueryClientProvider>
       </IntlProvider>
     );
   };
 
-  it('should render rule data', async () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('should render rule and alert data', async () => {
     const result = renderComponent();
 
     expect((await result.findByTestId('metricThresholdAppSection')).children.length).toBe(3);
+    expect(result.getByTestId('threshold-2000-2500')).toBeTruthy();
+  });
+
+  it('should render rule link', async () => {
+    renderComponent();
+
+    expect(mockedSetAlertSummaryFields).toBeCalledTimes(1);
+    expect(mockedSetAlertSummaryFields).toBeCalledWith([
+      {
+        label: 'Rule',
+        value: (
+          <EuiLink data-test-subj="alertDetailsAppSectionRuleLink" href={ruleLink}>
+            Monitoring hosts
+          </EuiLink>
+        ),
+      },
+    ]);
   });
 
   it('should render annotations', async () => {

x-pack/plugins/infra/public/alerting/metric_threshold/components/alert_details_app_section.tsx

@@ -5,17 +5,31 @@
  * 2.0.
  */
 
-import React, { useMemo } from 'react';
+import { i18n } from '@kbn/i18n';
+import { FormattedMessage } from '@kbn/i18n-react';
+import React, { useEffect, useMemo } from 'react';
 import moment from 'moment';
-import { EuiFlexGroup, EuiFlexItem, EuiPanel, useEuiTheme } from '@elastic/eui';
-import { TopAlert } from '@kbn/observability-plugin/public';
-import { ALERT_END, ALERT_START } from '@kbn/rule-data-utils';
+import {
+  EuiFlexGroup,
+  EuiFlexItem,
+  EuiLink,
+  EuiPanel,
+  EuiSpacer,
+  EuiText,
+  EuiTitle,
+  useEuiTheme,
+} from '@elastic/eui';
+import { AlertSummaryField, TopAlert } from '@kbn/observability-plugin/public';
+import { ALERT_END, ALERT_START, ALERT_EVALUATION_VALUES } from '@kbn/rule-data-utils';
 import { Rule } from '@kbn/alerting-plugin/common';
 import {
   AlertAnnotation,
   getPaddedAlertTimeRange,
   AlertActiveTimeRangeAnnotation,
 } from '@kbn/observability-alert-details';
+import { metricValueFormatter } from '../../../../common/alerting/metrics/metric_value_formatter';
+import { TIME_LABELS } from '../../common/criterion_preview_chart/criterion_preview_chart';
+import { Threshold } from '../../common/components/threshold';
 import { useSourceContext, withSourceProvider } from '../../../containers/metrics_source';
 import { generateUniqueKey } from '../lib/generate_unique_key';
 import { MetricsExplorerChartType } from '../../../pages/metrics/metrics_explorer/hooks/use_metrics_explorer_options';
@@ -37,19 +51,30 @@ const ALERT_START_ANNOTATION_ID = 'alert_start_annotation';
 const ALERT_TIME_RANGE_ANNOTATION_ID = 'alert_time_range_annotation';
 
 interface AppSectionProps {
-  rule: MetricThresholdRule;
   alert: MetricThresholdAlert;
+  rule: MetricThresholdRule;
+  ruleLink: string;
+  setAlertSummaryFields: React.Dispatch<React.SetStateAction<AlertSummaryField[] | undefined>>;
 }
 
-export function AlertDetailsAppSection({ alert, rule }: AppSectionProps) {
-  const { uiSettings } = useKibanaContextForPlugin().services;
+export function AlertDetailsAppSection({
+  alert,
+  rule,
+  ruleLink,
+  setAlertSummaryFields,
+}: AppSectionProps) {
+  const { uiSettings, charts } = useKibanaContextForPlugin().services;
   const { source, createDerivedIndexPattern } = useSourceContext();
   const { euiTheme } = useEuiTheme();
 
   const derivedIndexPattern = useMemo(
     () => createDerivedIndexPattern(),
     [createDerivedIndexPattern]
   );
+  const chartProps = {
+    theme: charts.theme.useChartsTheme(),
+    baseTheme: charts.theme.useChartsBaseTheme(),
+  };
   const timeRange = getPaddedAlertTimeRange(alert.fields[ALERT_START]!, alert.fields[ALERT_END]);
   const alertEnd = alert.fields[ALERT_END] ? moment(alert.fields[ALERT_END]).valueOf() : undefined;
   const annotations = [
@@ -68,22 +93,76 @@ export function AlertDetailsAppSection({ alert, rule }: AppSectionProps) {
       key={ALERT_TIME_RANGE_ANNOTATION_ID}
     />,
   ];
+  useEffect(() => {
+    setAlertSummaryFields([
+      {
+        label: i18n.translate('xpack.infra.metrics.alertDetailsAppSection.summaryField.rule', {
+          defaultMessage: 'Rule',
+        }),
+        value: (
+          <EuiLink data-test-subj="alertDetailsAppSectionRuleLink" href={ruleLink}>
+            {rule.name}
+          </EuiLink>
+        ),
+      },
+    ]);
+  }, [alert, rule, ruleLink, setAlertSummaryFields]);
 
   return !!rule.params.criteria ? (
     <EuiFlexGroup direction="column" data-test-subj="metricThresholdAppSection">
-      {rule.params.criteria.map((criterion) => (
+      {rule.params.criteria.map((criterion, index) => (
         <EuiFlexItem key={generateUniqueKey(criterion)}>
           <EuiPanel hasBorder hasShadow={false}>
-            <ExpressionChart
-              expression={criterion}
-              derivedIndexPattern={derivedIndexPattern}
-              source={source}
-              filterQuery={rule.params.filterQueryText}
-              groupBy={rule.params.groupBy}
-              chartType={MetricsExplorerChartType.line}
-              timeRange={timeRange}
-              annotations={annotations}
-            />
+            <EuiTitle size="xs">
+              <h4>
+                {criterion.aggType.toUpperCase()}{' '}
+                {'metric' in criterion ? criterion.metric : undefined}
+              </h4>
+            </EuiTitle>
+            <EuiText size="s" color="subdued">
+              <FormattedMessage
+                id="xpack.infra.metrics.alertDetailsAppSection.criterion.subtitle"
+                defaultMessage="Last {lookback} {timeLabel}"
+                values={{
+                  lookback: criterion.timeSize,
+                  timeLabel: TIME_LABELS[criterion.timeUnit as keyof typeof TIME_LABELS],
+                }}
+              />
+            </EuiText>
+            <EuiSpacer size="s" />
+            <EuiFlexGroup>
+              <EuiFlexItem style={{ minHeight: 150, minWidth: 160 }} grow={1}>
+                <Threshold
+                  chartProps={chartProps}
+                  id={`threshold-${generateUniqueKey(criterion)}`}
+                  threshold={criterion.threshold[0]}
+                  value={alert.fields[ALERT_EVALUATION_VALUES]![index]}
+                  valueFormatter={(d) =>
+                    metricValueFormatter(d, 'metric' in criterion ? criterion.metric : undefined)
+                  }
+                  title={i18n.translate(
+                    'xpack.infra.metrics.alertDetailsAppSection.thresholdTitle',
+                    {
+                      defaultMessage: 'Threshold breached',
+                    }
+                  )}
+                  comparator={criterion.comparator}
+                />
+              </EuiFlexItem>
+              <EuiFlexItem grow={5}>
+                <ExpressionChart
+                  annotations={annotations}
+                  chartType={MetricsExplorerChartType.line}
+                  derivedIndexPattern={derivedIndexPattern}
+                  expression={criterion}
+                  filterQuery={rule.params.filterQueryText}
+                  groupBy={rule.params.groupBy}
+                  hideTitle
+                  source={source}
+                  timeRange={timeRange}
+                />
+              </EuiFlexItem>
+            </EuiFlexGroup>
           </EuiPanel>
         </EuiFlexItem>
       ))}

x-pack/plugins/infra/public/alerting/metric_threshold/components/expression_chart.tsx

@@ -49,23 +49,25 @@ import { CUSTOM_EQUATION } from '../i18n_strings';
 interface Props {
   expression: MetricExpression;
   derivedIndexPattern: DataViewBase;
-  source?: MetricsSourceConfiguration;
+  annotations?: Array<ReactElement<typeof RectAnnotation | typeof LineAnnotation>>;
+  chartType?: MetricsExplorerChartType;
   filterQuery?: string;
   groupBy?: string | string[];
-  chartType?: MetricsExplorerChartType;
+  hideTitle?: boolean;
+  source?: MetricsSourceConfiguration;
   timeRange?: TimeRange;
-  annotations?: Array<ReactElement<typeof RectAnnotation | typeof LineAnnotation>>;
 }
 
 export const ExpressionChart: React.FC<Props> = ({
   expression,
   derivedIndexPattern,
-  source,
+  annotations,
+  chartType = MetricsExplorerChartType.bar,
   filterQuery,
   groupBy,
-  chartType = MetricsExplorerChartType.bar,
+  hideTitle = false,
+  source,
   timeRange,
-  annotations,
 }) => {
   const { uiSettings, charts } = useKibanaContextForPlugin().services;
 
@@ -200,25 +202,27 @@ export const ExpressionChart: React.FC<Props> = ({
           />
         </Chart>
       </ChartContainer>
-      <div style={{ textAlign: 'center' }}>
-        {series.id !== 'ALL' ? (
-          <EuiText size="xs" color="subdued">
-            <FormattedMessage
-              id="xpack.infra.metrics.alerts.dataTimeRangeLabelWithGrouping"
-              defaultMessage="Last {lookback} {timeLabel} of data for {id}"
-              values={{ id: series.id, timeLabel, lookback: timeSize! * 20 }}
-            />
-          </EuiText>
-        ) : (
-          <EuiText size="xs" color="subdued">
-            <FormattedMessage
-              id="xpack.infra.metrics.alerts.dataTimeRangeLabel"
-              defaultMessage="Last {lookback} {timeLabel}"
-              values={{ timeLabel, lookback: timeSize! * 20 }}
-            />
-          </EuiText>
-        )}
-      </div>
+      {!hideTitle && (
+        <div style={{ textAlign: 'center' }}>
+          {series.id !== 'ALL' ? (
+            <EuiText size="xs" color="subdued">
+              <FormattedMessage
+                id="xpack.infra.metrics.alerts.dataTimeRangeLabelWithGrouping"
+                defaultMessage="Last {lookback} {timeLabel} of data for {id}"
+                values={{ id: series.id, timeLabel, lookback: timeSize! * 20 }}
+              />
+            </EuiText>
+          ) : (
+            <EuiText size="xs" color="subdued">
+              <FormattedMessage
+                id="xpack.infra.metrics.alerts.dataTimeRangeLabel"
+                defaultMessage="Last {lookback} {timeLabel}"
+                values={{ timeLabel, lookback: timeSize! * 20 }}
+              />
+            </EuiText>
+          )}
+        </div>
+      )}
     </>
   );
 };