Kpi host (elastic#35065)

* init graphql

* update KPIs

* add charts

* isolate charts

* fix app crashes on screen resizing

* gen types

* rename variables

* simplify flex groups, add icon var, rm loading

* add icon names, change flex grows

* rm overlay, enable axes, show first/last ticks

* unabbreviate destination

* update UI

* update histogram data

* customize chart axis

* update x-axis for area chart

* handle no data cases

* update unit test

* fix lint error

fix type error

fix unit itest

* rename i18n var

* fix response data type

* add unit test for areachart

* add unit test for barchart

* fix UI

* add more test case for barchart

* fix for code review

* gathering mock data in kpi_host integration test

x-pack/plugins/siem/public/components/page/hosts/index.tsx

@@ -8,3 +8,4 @@ export * from './authentications_table';
 export * from './events_table';
 export * from './hosts_table';
 export * from './uncommon_process_table';
+export * from './kpi_hosts';

x-pack/plugins/siem/public/components/page/hosts/kpi_hosts/index.tsx

@@ -0,0 +1,166 @@
+/*
+ * 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 { EuiFlexGroup } from '@elastic/eui';
+import { get, getOr } from 'lodash/fp';
+import React from 'react';
+import { pure } from 'recompose';
+import { EuiLoadingSpinner } from '@elastic/eui';
+import { EuiFlexItem } from '@elastic/eui';
+import { KpiHostsData } from '../../../../graphql/types';
+import {
+  AreaChartData,
+  BarChartData,
+  StatItem,
+  StatItems,
+  StatItemsComponent,
+  StatItemsProps,
+} from '../../../stat_items';
+import * as i18n from './translations';
+
+interface KpiHostsProps {
+  data: KpiHostsData;
+  loading: boolean;
+}
+
+const euiColorVis0 = '#00B3A4';
+const euiColorVis1 = '#3185FC';
+const euiColorVis2 = '#DB1374';
+const euiColorVis3 = '#490092';
+const euiColorVis9 = '#920000';
+
+const fieldTitleMapping: StatItems[] = [
+  {
+    fields: [
+      {
+        key: 'hosts',
+        value: null,
+        color: euiColorVis1,
+        icon: 'storage',
+      },
+    ],
+    enableAreaChart: true,
+    grow: 2,
+    description: i18n.HOSTS,
+  },
+  {
+    fields: [
+      {
+        key: 'authSuccess',
+        description: i18n.AUTHENTICATION_SUCCESS,
+        value: null,
+        color: euiColorVis0,
+        icon: 'check',
+      },
+      {
+        key: 'authFailure',
+        description: i18n.AUTHENTICATION_FAILURE,
+        value: null,
+        color: euiColorVis9,
+        icon: 'cross',
+      },
+    ],
+    enableAreaChart: true,
+    enableBarChart: true,
+    grow: 4,
+    description: i18n.AUTHENTICATION,
+  },
+  {
+    fields: [
+      {
+        key: 'uniqueSourceIps',
+        name: i18n.UNIQUE_SOURCE_IPS_ABBREVIATION,
+        description: i18n.UNIQUE_SOURCE_IPS,
+        value: null,
+        color: euiColorVis2,
+        icon: 'visMapCoordinate',
+      },
+      {
+        key: 'uniqueDestinationIps',
+        description: i18n.UNIQUE_DESTINATION_IPS,
+        value: null,
+        color: euiColorVis3,
+        icon: 'visMapCoordinate',
+      },
+    ],
+    enableAreaChart: true,
+    enableBarChart: true,
+    grow: 4,
+    description: i18n.UNIQUE_IPS,
+  },
+];
+
+export const KpiHostsComponent = pure<KpiHostsProps>(({ data, loading }) => {
+  return loading ? (
+    <EuiFlexGroup justifyContent="center" alignItems="center" style={{ minHeight: 247 }}>
+      <EuiFlexItem grow={false}>
+        <EuiLoadingSpinner size="xl" />
+      </EuiFlexItem>
+    </EuiFlexGroup>
+  ) : (
+    <EuiFlexGroup>
+      {fieldTitleMapping.map(stat => {
+        let statItemProps: StatItemsProps = {
+          ...stat,
+          key: `kpi-hosts-summary-${stat.description}`,
+        };
+
+        if (stat.fields != null)
+          statItemProps = {
+            ...statItemProps,
+            fields: addValueToFields(stat.fields, data),
+          };
+
+        if (stat.enableAreaChart)
+          statItemProps = {
+            ...statItemProps,
+            areaChart: addValueToAreaChart(stat.fields, data),
+          };
+
+        if (stat.enableBarChart != null)
+          statItemProps = {
+            ...statItemProps,
+            barChart: addValueToBarChart(stat.fields, data),
+          };
+
+        return <StatItemsComponent {...statItemProps} />;
+      })}
+    </EuiFlexGroup>
+  );
+});
+
+const addValueToFields = (fields: StatItem[], data: KpiHostsData): StatItem[] =>
+  fields.map(field => ({ ...field, value: get(field.key, data) }));
+
+const addValueToAreaChart = (fields: StatItem[], data: KpiHostsData): AreaChartData[] =>
+  fields
+    .filter(field => get(`${field.key}Histogram`, data) != null)
+    .map(field => ({
+      ...field,
+      value: get(`${field.key}Histogram`, data),
+      key: `${field.key}Histogram`,
+    }));
+
+const addValueToBarChart = (fields: StatItem[], data: KpiHostsData): BarChartData[] => {
+  if (fields.length === 0) return [];
+  return fields.reduce((acc: BarChartData[], field: StatItem, idx: number) => {
+    const key: string = get('key', field);
+    const x: number | null = getOr(null, key, data);
+    const y: string = get(`${idx}.name`, fields) || getOr('', `${idx}.description`, fields);
+
+    return acc.concat([
+      {
+        ...field,
+        value: [
+          {
+            x,
+            y,
+          },
+        ],
+      },
+    ]);
+  }, []);
+};