[Cases] Fix add Lens markdown plugin UX

package.json

@@ -376,6 +376,7 @@
     "redux-thunk": "^2.3.0",
     "redux-thunks": "^1.0.0",
     "regenerator-runtime": "^0.13.3",
+    "remark-parse": "^8.0.3",
     "remark-stringify": "^9.0.0",
     "request": "^2.88.0",
     "require-in-the-middle": "^5.0.2",

x-pack/plugins/cases/common/utils/markdown_plugins/utils.ts

@@ -0,0 +1,56 @@
+/*
+ * 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 { filter } from 'lodash';
+import type { Node } from 'unist';
+import markdown from 'remark-parse';
+import remarkStringify from 'remark-stringify';
+import unified from 'unified';
+
+import { TimeRange } from 'src/plugins/data/server';
+import { SerializableRecord } from '@kbn/utility-types';
+import { LENS_ID, LensParser, LensSerializer } from './lens';
+import { TimelineSerializer, TimelineParser } from './timeline';
+
+interface LensMarkdownNode extends Node {
+  timeRange: TimeRange;
+  attributes: SerializableRecord;
+  type: string;
+  id: string;
+}
+
+interface LensMarkdownParent extends Node {
+  children: Array<LensMarkdownNode | Node>;
+}
+
+export const getLensVisualizations = (parsedComment?: Array<LensMarkdownNode | Node>) =>
+  (parsedComment?.length ? filter(parsedComment, { type: LENS_ID }) : []) as LensMarkdownNode[];
+
+export const parseCommentString = (comment: string) => {
+  const processor = unified().use([[markdown, {}], LensParser, TimelineParser]);
+  return processor.parse(comment) as LensMarkdownParent;
+};
+
+export const stringifyComment = (comment: LensMarkdownParent) =>
+  unified()
+    .use([
+      [
+        remarkStringify,
+        {
+          allowDangerousHtml: true,
+          handlers: {
+            /*
+              because we're using rison in the timeline url we need
+              to make sure that markdown parser doesn't modify the url
+            */
+            timeline: TimelineSerializer,
+            lens: LensSerializer,
+          },
+        },
+      ],
+    ])
+    .stringify(comment);

x-pack/plugins/cases/public/common/lib/kibana/kibana_react.mock.ts

@@ -15,16 +15,14 @@ import { EuiTheme } from '../../../../../../../src/plugins/kibana_react/common';
 import { securityMock } from '../../../../../security/public/mocks';
 import { triggersActionsUiMock } from '../../../../../triggers_actions_ui/public/mocks';
 
-export const mockCreateStartServicesMock = (): StartServices =>
-  (({
-    ...coreMock.createStart(),
-    security: securityMock.createStart(),
-    triggersActionsUi: triggersActionsUiMock.createStart(),
-  } as unknown) as StartServices);
-
 export const createStartServicesMock = (): StartServices =>
   (({
     ...coreMock.createStart(),
+    storage: { ...coreMock.createStorage(), remove: jest.fn() },
+    lens: {
+      canUseEditor: jest.fn(),
+      navigateToPrefilledEditor: jest.fn(),
+    },
     security: securityMock.createStart(),
     triggersActionsUi: triggersActionsUiMock.createStart(),
   } as unknown) as StartServices);

x-pack/plugins/cases/public/components/create/description.tsx

@@ -17,16 +17,26 @@ interface Props {
 export const fieldName = 'description';
 
 const DescriptionComponent: React.FC<Props> = ({ isLoading }) => {
-  const { draftComment, openLensModal } = useLensDraftComment();
+  const {
+    draftComment,
+    hasIncomingLensState,
+    openLensModal,
+    clearDraftComment,
+  } = useLensDraftComment();
   const { setFieldValue } = useFormContext();
   const editorRef = useRef<Record<string, any>>();
 
   useEffect(() => {
     if (draftComment?.commentId === fieldName && editorRef.current) {
       setFieldValue(fieldName, draftComment.comment);
-      openLensModal({ editorRef: editorRef.current });
+
+      if (hasIncomingLensState) {
+        openLensModal({ editorRef: editorRef.current });
+      } else {
+        clearDraftComment();
+      }
     }
-  }, [draftComment, openLensModal, setFieldValue]);
+  }, [clearDraftComment, draftComment, hasIncomingLensState, openLensModal, setFieldValue]);
 
   return (
     <UseField

x-pack/plugins/cases/public/components/markdown_editor/editor.tsx

@@ -16,10 +16,16 @@ import React, {
   ElementRef,
 } from 'react';
 import { PluggableList } from 'unified';
-import { EuiMarkdownEditor, EuiMarkdownEditorUiPlugin } from '@elastic/eui';
+import {
+  EuiMarkdownEditor,
+  EuiMarkdownEditorProps,
+  EuiMarkdownAstNode,
+  EuiMarkdownEditorUiPlugin,
+} from '@elastic/eui';
 import { ContextShape } from '@elastic/eui/src/components/markdown_editor/markdown_context';
 import { usePlugins } from './use_plugins';
 import { CommentEditorContext } from './context';
+import { useLensButtonToggle } from './plugins/lens/use_lens_button_toggle';
 
 interface MarkdownEditorProps {
   ariaLabel: string;
@@ -43,13 +49,22 @@ export interface MarkdownEditorRef {
 
 const MarkdownEditorComponent = forwardRef<MarkdownEditorRef, MarkdownEditorProps>(
   ({ ariaLabel, dataTestSubj, editorId, height, onChange, value }, ref) => {
+    const astRef = useRef<EuiMarkdownAstNode | undefined>(undefined);
     const [markdownErrorMessages, setMarkdownErrorMessages] = useState([]);
-    const onParse = useCallback((err, { messages }) => {
+    const onParse: EuiMarkdownEditorProps['onParse'] = useCallback((err, { messages, ast }) => {
       setMarkdownErrorMessages(err ? [err] : messages);
+      astRef.current = ast;
     }, []);
     const { parsingPlugins, processingPlugins, uiPlugins } = usePlugins();
     const editorRef = useRef<EuiMarkdownEditorRef>(null);
 
+    useLensButtonToggle({
+      astRef,
+      uiPlugins,
+      editorRef: ref as React.MutableRefObject<MarkdownEditorRef>,
+      value,
+    });
+
     const commentEditorContextValue = useMemo(
       () => ({
         editorId,

x-pack/plugins/cases/public/components/markdown_editor/plugins/lens/constants.ts

@@ -6,6 +6,6 @@
  */
 
 export const ID = 'lens';
-export const PREFIX = `[`;
+export const PREFIX = `!{${ID}`;
 export const LENS_VISUALIZATION_HEIGHT = 200;
 export const DRAFT_COMMENT_STORAGE_ID = 'xpack.cases.commentDraft';

x-pack/plugins/cases/public/components/markdown_editor/plugins/lens/index.ts

@@ -8,6 +8,6 @@
 import { plugin } from './plugin';
 import { LensParser } from './parser';
 import { LensMarkDownRenderer } from './processor';
-import { INSERT_LENS } from './translations';
+import { VISUALIZATION } from './translations';
 
-export { plugin, LensParser as parser, LensMarkDownRenderer as renderer, INSERT_LENS };
+export { plugin, LensParser as parser, LensMarkDownRenderer as renderer, VISUALIZATION };

x-pack/plugins/cases/public/components/markdown_editor/plugins/lens/modal_container.tsx

@@ -5,10 +5,12 @@
  * 2.0.
  */
 
+import { EuiFlexGroup } from '@elastic/eui';
 import styled from 'styled-components';
 
-export const ModalContainer = styled.div`
+export const ModalContainer = styled(EuiFlexGroup)`
   width: ${({ theme }) => theme.eui.euiBreakpoints.m};
+  height: 100%;
 
   .euiModalBody {
     min-height: 300px;

x-pack/plugins/cases/public/components/markdown_editor/plugins/lens/parser.ts

@@ -7,15 +7,15 @@
 
 import { Plugin } from 'unified';
 import { RemarkTokenizer } from '@elastic/eui';
-import { ID } from './constants';
+import { ID, PREFIX } from './constants';
 
 export const LensParser: Plugin = function () {
   const Parser = this.Parser;
   const tokenizers = Parser.prototype.blockTokenizers;
   const methods = Parser.prototype.blockMethods;
 
   const tokenizeLens: RemarkTokenizer = function (eat, value, silent) {
-    if (value.startsWith(`!{${ID}`) === false) return false;
+    if (value.startsWith(PREFIX) === false) return false;
 
     const nextChar = value[6];
 
@@ -28,7 +28,7 @@ export const LensParser: Plugin = function () {
     // is there a configuration?
     const hasConfiguration = nextChar === '{';
 
-    let match = `!{${ID}`;
+    let match = PREFIX;
     let configuration = {};
 
     if (hasConfiguration) {