[examples] expressions explorer (elastic#88344)

docs/development/plugins/expressions/public/kibana-plugin-plugins-expressions-public.expressionsinspectoradapter.ast.md

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+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-plugins-expressions-public](./kibana-plugin-plugins-expressions-public.md) &gt; [ExpressionsInspectorAdapter](./kibana-plugin-plugins-expressions-public.expressionsinspectoradapter.md) &gt; [ast](./kibana-plugin-plugins-expressions-public.expressionsinspectoradapter.ast.md)
+
+## ExpressionsInspectorAdapter.ast property
+
+<b>Signature:</b>
+
+```typescript
+get ast(): any;
+```

docs/development/plugins/expressions/public/kibana-plugin-plugins-expressions-public.expressionsinspectoradapter.logast.md

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+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-plugins-expressions-public](./kibana-plugin-plugins-expressions-public.md) &gt; [ExpressionsInspectorAdapter](./kibana-plugin-plugins-expressions-public.expressionsinspectoradapter.md) &gt; [logAST](./kibana-plugin-plugins-expressions-public.expressionsinspectoradapter.logast.md)
+
+## ExpressionsInspectorAdapter.logAST() method
+
+<b>Signature:</b>
+
+```typescript
+logAST(ast: any): void;
+```
+
+## Parameters
+
+|  Parameter | Type | Description |
+|  --- | --- | --- |
+|  ast | <code>any</code> |  |
+
+<b>Returns:</b>
+
+`void`
+

docs/development/plugins/expressions/public/kibana-plugin-plugins-expressions-public.expressionsinspectoradapter.md

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+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-plugins-expressions-public](./kibana-plugin-plugins-expressions-public.md) &gt; [ExpressionsInspectorAdapter](./kibana-plugin-plugins-expressions-public.expressionsinspectoradapter.md)
+
+## ExpressionsInspectorAdapter class
+
+<b>Signature:</b>
+
+```typescript
+export declare class ExpressionsInspectorAdapter extends EventEmitter 
+```
+
+## Properties
+
+|  Property | Modifiers | Type | Description |
+|  --- | --- | --- | --- |
+|  [ast](./kibana-plugin-plugins-expressions-public.expressionsinspectoradapter.ast.md) |  | <code>any</code> |  |
+
+## Methods
+
+|  Method | Modifiers | Description |
+|  --- | --- | --- |
+|  [logAST(ast)](./kibana-plugin-plugins-expressions-public.expressionsinspectoradapter.logast.md) |  |  |
+

docs/development/plugins/expressions/public/kibana-plugin-plugins-expressions-public.md

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 |  [ExpressionRenderer](./kibana-plugin-plugins-expressions-public.expressionrenderer.md) |  |
 |  [ExpressionRendererRegistry](./kibana-plugin-plugins-expressions-public.expressionrendererregistry.md) |  |
 |  [ExpressionRenderHandler](./kibana-plugin-plugins-expressions-public.expressionrenderhandler.md) |  |
+|  [ExpressionsInspectorAdapter](./kibana-plugin-plugins-expressions-public.expressionsinspectoradapter.md) |  |
 |  [ExpressionsPublicPlugin](./kibana-plugin-plugins-expressions-public.expressionspublicplugin.md) |  |
 |  [ExpressionsService](./kibana-plugin-plugins-expressions-public.expressionsservice.md) | <code>ExpressionsService</code> class is used for multiple purposes:<!-- -->1. It implements the same Expressions service that can be used on both: (1) server-side and (2) browser-side. 2. It implements the same Expressions service that users can fork/clone, thus have their own instance of the Expressions plugin. 3. <code>ExpressionsService</code> defines the public contracts of \*setup\* and \*start\* Kibana Platform life-cycles for ease-of-use on server-side and browser-side. 4. <code>ExpressionsService</code> creates a bound version of all exported contract functions. 5. Functions are bound the way there are:<!-- -->\`\`\`<!-- -->ts registerFunction = (...args: Parameters<!-- -->&lt;<!-- -->Executor\['registerFunction'\]<!-- -->&gt; ): ReturnType<!-- -->&lt;<!-- -->Executor\['registerFunction'\]<!-- -->&gt; =<!-- -->&gt; this.executor.registerFunction(...args); \`\`\`<!-- -->so that JSDoc appears in developers IDE when they use those <code>plugins.expressions.registerFunction(</code>. |
 |  [ExpressionType](./kibana-plugin-plugins-expressions-public.expressiontype.md) |  |

examples/expressions_explorer/README.md

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+## expressions explorer
+
+This example expressions explorer app shows how to:
+ - to run expression
+ - to render expression output
+ - emit events from expression renderer and handle them
+
+To run this example, use the command `yarn start --run-examples`.

examples/expressions_explorer/kibana.json

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+{
+  "id": "expressionsExplorer",
+  "version": "0.0.1",
+  "kibanaVersion": "kibana",
+  "server": false,
+  "ui": true,
+  "requiredPlugins": ["expressions", "inspector", "uiActions", "developerExamples"],
+  "optionalPlugins": [],
+  "requiredBundles": []
+}

examples/expressions_explorer/public/actions/navigate_action.ts

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+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * and the Server Side Public License, v 1; you may not use this file except in
+ * compliance with, at your election, the Elastic License or the Server Side
+ * Public License, v 1.
+ */
+
+import { createAction } from '../../../../src/plugins/ui_actions/public';
+
+export const ACTION_NAVIGATE = 'ACTION_NAVIGATE';
+
+export const createNavigateAction = () =>
+  createAction({
+    id: ACTION_NAVIGATE,
+    type: ACTION_NAVIGATE,
+    getDisplayName: () => 'Navigate',
+    execute: async (event: any) => {
+      window.location.href = event.href;
+    },
+  });

examples/expressions_explorer/public/actions/navigate_trigger.ts

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+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * and the Server Side Public License, v 1; you may not use this file except in
+ * compliance with, at your election, the Elastic License or the Server Side
+ * Public License, v 1.
+ */
+
+import { Trigger } from '../../../../src/plugins/ui_actions/public';
+
+export const NAVIGATE_TRIGGER_ID = 'NAVIGATE_TRIGGER_ID';
+
+export const navigateTrigger: Trigger = {
+  id: NAVIGATE_TRIGGER_ID,
+};

examples/expressions_explorer/public/actions_and_expressions.tsx

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+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * and the Server Side Public License, v 1; you may not use this file except in
+ * compliance with, at your election, the Elastic License or the Server Side
+ * Public License, v 1.
+ */
+
+import React, { useState } from 'react';
+import {
+  EuiFlexItem,
+  EuiFlexGroup,
+  EuiPageBody,
+  EuiPageContent,
+  EuiPageContentBody,
+  EuiPageHeader,
+  EuiPageHeaderSection,
+  EuiPanel,
+  EuiText,
+  EuiTitle,
+} from '@elastic/eui';
+import {
+  ExpressionsStart,
+  ReactExpressionRenderer,
+  ExpressionsInspectorAdapter,
+} from '../../../src/plugins/expressions/public';
+import { ExpressionEditor } from './editor/expression_editor';
+import { UiActionsStart } from '../../../src/plugins/ui_actions/public';
+import { NAVIGATE_TRIGGER_ID } from './actions/navigate_trigger';
+
+interface Props {
+  expressions: ExpressionsStart;
+  actions: UiActionsStart;
+}
+
+export function ActionsExpressionsExample({ expressions, actions }: Props) {
+  const [expression, updateExpression] = useState(
+    'button name="click me" href="http://www.google.com"'
+  );
+
+  const expressionChanged = (value: string) => {
+    updateExpression(value);
+  };
+
+  const inspectorAdapters = {
+    expression: new ExpressionsInspectorAdapter(),
+  };
+
+  const handleEvents = (event: any) => {
+    if (event.id !== 'NAVIGATE') return;
+    // enrich event context with some extra data
+    event.baseUrl = 'http://www.google.com';
+
+    actions.executeTriggerActions(NAVIGATE_TRIGGER_ID, event.value);
+  };
+
+  return (
+    <EuiPageBody>
+      <EuiPageHeader>
+        <EuiPageHeaderSection>
+          <EuiTitle size="l">
+            <h1>Actions from expression renderers</h1>
+          </EuiTitle>
+        </EuiPageHeaderSection>
+      </EuiPageHeader>
+      <EuiPageContent>
+        <EuiPageContentBody>
+          <EuiFlexGroup>
+            <EuiFlexItem>
+              <EuiText>
+                Here you can play with sample `button` which takes a url as configuration and
+                displays a button which emits custom BUTTON_CLICK trigger to which we have attached
+                a custom action which performs the navigation.
+              </EuiText>
+            </EuiFlexItem>
+          </EuiFlexGroup>
+
+          <EuiFlexGroup gutterSize="l">
+            <EuiFlexItem>
+              <EuiPanel data-test-subj="expressionEditor" paddingSize="none" role="figure">
+                <ExpressionEditor value={expression} onChange={expressionChanged} />
+              </EuiPanel>
+            </EuiFlexItem>
+            <EuiFlexItem>
+              <EuiPanel paddingSize="none" role="figure">
+                <ReactExpressionRenderer
+                  expression={expression}
+                  debug={true}
+                  inspectorAdapters={inspectorAdapters}
+                  onEvent={handleEvents}
+                  renderError={(message: any) => {
+                    return <div>{message}</div>;
+                  }}
+                />
+              </EuiPanel>
+            </EuiFlexItem>
+          </EuiFlexGroup>
+        </EuiPageContentBody>
+      </EuiPageContent>
+    </EuiPageBody>
+  );
+}

examples/expressions_explorer/public/app.tsx

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+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * and the Server Side Public License, v 1; you may not use this file except in
+ * compliance with, at your election, the Elastic License or the Server Side
+ * Public License, v 1.
+ */
+
+import React from 'react';
+import ReactDOM from 'react-dom';
+import {
+  EuiPage,
+  EuiPageHeader,
+  EuiPageBody,
+  EuiPageContent,
+  EuiPageContentBody,
+  EuiSpacer,
+  EuiText,
+  EuiLink,
+} from '@elastic/eui';
+import { AppMountParameters } from '../../../src/core/public';
+import { ExpressionsStart } from '../../../src/plugins/expressions/public';
+import { Start as InspectorStart } from '../../../src/plugins/inspector/public';
+import { RunExpressionsExample } from './run_expressions';
+import { RenderExpressionsExample } from './render_expressions';
+import { ActionsExpressionsExample } from './actions_and_expressions';
+import { UiActionsStart } from '../../../src/plugins/ui_actions/public';
+
+interface Props {
+  expressions: ExpressionsStart;
+  inspector: InspectorStart;
+  actions: UiActionsStart;
+}
+
+const ExpressionsExplorer = ({ expressions, inspector, actions }: Props) => {
+  return (
+    <EuiPage>
+      <EuiPageBody>
+        <EuiPageHeader>Expressions Explorer</EuiPageHeader>
+        <EuiPageContent>
+          <EuiPageContentBody>
+            <EuiText>
+              <p>
+                There are a couple of ways to run the expressions. Below some of the options are
+                demonstrated. You can read more about it{' '}
+                <EuiLink
+                  href={
+                    'https://github.com/elastic/kibana/blob/master/src/plugins/expressions/README.asciidoc'
+                  }
+                >
+                  here
+                </EuiLink>
+              </p>
+            </EuiText>
+
+            <EuiSpacer />
+
+            <RunExpressionsExample expressions={expressions} inspector={inspector} />
+
+            <EuiSpacer />
+
+            <RenderExpressionsExample expressions={expressions} inspector={inspector} />
+
+            <EuiSpacer />
+
+            <ActionsExpressionsExample expressions={expressions} actions={actions} />
+          </EuiPageContentBody>
+        </EuiPageContent>
+      </EuiPageBody>
+    </EuiPage>
+  );
+};
+
+export const renderApp = (props: Props, { element }: AppMountParameters) => {
+  ReactDOM.render(<ExpressionsExplorer {...props} />, element);
+
+  return () => ReactDOM.unmountComponentAtNode(element);
+};

examples/expressions_explorer/public/editor/expression_editor.tsx

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+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * and the Server Side Public License, v 1; you may not use this file except in
+ * compliance with, at your election, the Elastic License or the Server Side
+ * Public License, v 1.
+ */
+
+import React from 'react';
+import { EuiCodeEditor } from '@elastic/eui';
+
+interface Props {
+  value: string;
+  onChange: (value: string) => void;
+}
+
+export function ExpressionEditor({ value, onChange }: Props) {
+  return (
+    <EuiCodeEditor
+      mode="javascript"
+      theme="github"
+      width="100%"
+      value={value}
+      onChange={onChange}
+      setOptions={{
+        fontSize: '14px',
+        enableBasicAutocompletion: true,
+        enableSnippets: true,
+        enableLiveAutocompletion: true,
+      }}
+      onBlur={() => {}}
+      aria-label="Code Editor"
+    />
+  );
+}

examples/expressions_explorer/public/functions/button.ts

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+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * and the Server Side Public License, v 1; you may not use this file except in
+ * compliance with, at your election, the Elastic License or the Server Side
+ * Public License, v 1.
+ */
+
+import { i18n } from '@kbn/i18n';
+import { ExpressionFunctionDefinition } from '../../../../src/plugins/expressions/common';
+
+interface Arguments {
+  href: string;
+  name: string;
+}
+
+export type ExpressionFunctionButton = ExpressionFunctionDefinition<
+  'button',
+  unknown,
+  Arguments,
+  unknown
+>;
+
+export const buttonFn: ExpressionFunctionButton = {
+  name: 'button',
+  args: {
+    href: {
+      help: i18n.translate('expressions.functions.font.args.href', {
+        defaultMessage: 'Link to which to navigate',
+      }),
+      types: ['string'],
+      required: true,
+    },
+    name: {
+      help: i18n.translate('expressions.functions.font.args.name', {
+        defaultMessage: 'Name of the button',
+      }),
+      types: ['string'],
+      default: 'button',
+    },
+  },
+  help: 'Configures the button',
+  fn: (input: unknown, args: Arguments) => {
+    return {
+      type: 'render',
+      as: 'button',
+      value: args,
+    };
+  },
+};