[Alerting] Adds navigation by consumer and alert type to alerting

examples/alerting_example/README.md

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+## Alerting Example
+
+This example plugin shows you how to create a custom Alert Type, create alerts based on that type and corresponding UI for viewing the details of all the alerts within the custom plugin.
+
+To run this example, use the command `yarn start --run-examples`.

examples/alerting_example/common/constants.ts

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+/*
+ * 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.
+ */
+
+export const ALERTING_EXAMPLE_APP_ID = 'AlertingExample';
+
+// always firing
+export const DEFAULT_INSTANCES_TO_GENERATE = 5;
+
+// Astros
+export enum Craft {
+  OuterSpace = 'Outer Space',
+  ISS = 'ISS',
+}
+export enum Operator {
+  AreAbove = 'Are above',
+  AreBelow = 'Are below',
+  AreExactly = 'Are exactly',
+}

examples/alerting_example/kibana.json

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+{
+  "id": "alertingExample",
+  "version": "0.0.1",
+  "kibanaVersion": "kibana",
+  "configPath": ["alerting_example"],
+  "server": true,
+  "ui": true,
+  "requiredPlugins": ["triggers_actions_ui", "charts", "data", "alerting", "actions"],
+  "optionalPlugins": []
+}

examples/alerting_example/package.json

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+{
+  "name": "alerting_example",
+  "version": "1.0.0",
+  "main": "target/examples/alerting_example",
+  "kibana": {
+    "version": "kibana",
+    "templateVersion": "1.0.0"
+  },
+  "license": "Apache-2.0",
+  "scripts": {
+    "kbn": "node ../../scripts/kbn.js",
+    "build": "rm -rf './target' && tsc"
+  },
+  "devDependencies": {
+    "typescript": "3.7.2"
+  }
+}

examples/alerting_example/public/alert_types/always_firing.tsx

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+/*
+ * 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, { Fragment } from 'react';
+import { EuiFlexGroup, EuiFlexItem, EuiFieldNumber, EuiFormRow } from '@elastic/eui';
+import { i18n } from '@kbn/i18n';
+import { AlertTypeModel } from '../../../../x-pack/plugins/triggers_actions_ui/public';
+import { DEFAULT_INSTANCES_TO_GENERATE } from '../../common/constants';
+
+interface AlwaysFiringParamsProps {
+  alertParams: { instances?: number };
+  setAlertParams: (property: string, value: any) => void;
+  errors: { [key: string]: string[] };
+}
+
+export function getAlertType(): AlertTypeModel {
+  return {
+    id: 'example.always-firing',
+    name: 'Always Fires',
+    iconClass: 'bolt',
+    alertParamsExpression: AlwaysFiringExpression,
+    validate: (alertParams: AlwaysFiringParamsProps['alertParams']) => {
+      const { instances } = alertParams;
+      const validationResult = {
+        errors: {
+          instances: new Array<string>(),
+        },
+      };
+      if (instances && instances < 0) {
+        validationResult.errors.instances.push(
+          i18n.translate('AlertingExample.addAlert.error.invalidRandomInstances', {
+            defaultMessage: 'instances must be equal or greater than zero.',
+          })
+        );
+      }
+      return validationResult;
+    },
+  };
+}
+
+export const AlwaysFiringExpression: React.FunctionComponent<AlwaysFiringParamsProps> = ({
+  alertParams,
+  setAlertParams,
+}) => {
+  const { instances = DEFAULT_INSTANCES_TO_GENERATE } = alertParams;
+  return (
+    <Fragment>
+      <EuiFlexGroup gutterSize="s" wrap direction="column">
+        <EuiFlexItem grow={true}>
+          <EuiFormRow
+            label="Random Instances to generate"
+            helpText="How many randomly generated Alert Instances do you wish to activate on each alert run?"
+          >
+            <EuiFieldNumber
+              name="instances"
+              value={instances}
+              onChange={event => {
+                setAlertParams('instances', event.target.valueAsNumber);
+              }}
+            />
+          </EuiFormRow>
+        </EuiFlexItem>
+      </EuiFlexGroup>
+    </Fragment>
+  );
+};