feat(richtext-lexical): add htmlToLexical helper (#11479)

This adds a new `convertHTMLToLexical` helper that makes converting HTML to Lexical easy

Author: AlessioGr

docs/rich-text/converters.mdx

@@ -338,8 +338,8 @@ export const UploadFeature: FeatureProviderProviderServer<
 
 Lexical provides a seamless way to perform conversions between various other formats:
 
-- HTML to Lexical (or, importing HTML into the lexical editor)
-- Markdown to Lexical (or, importing Markdown into the lexical editor)
+- HTML to Lexical
+- Markdown to Lexical
 - Lexical to Markdown
 
 A headless editor can perform such conversions outside of the main editor instance. Follow this method to initiate a headless editor:
@@ -455,46 +455,22 @@ export const MyCollection: CollectionConfig = {
 
 ## HTML => Lexical
 
-Once you have your headless editor instance, you can use it to convert HTML to Lexical:
+If you have access to the Payload Config and the lexical editor config, you can convert HTML to the lexical editor state with the following:
 
 ```ts
-import { $generateNodesFromDOM } from '@payloadcms/richtext-lexical/lexical/html'
-import { $getRoot, $getSelection } from '@payloadcms/richtext-lexical/lexical'
+import { convertHTMLToLexical, editorConfigFactory } from '@payloadcms/richtext-lexical'
+// Make sure you have jsdom and @types/jsdom installed
 import { JSDOM } from 'jsdom'
 
-headlessEditor.update(
-  () => {
-    // In a headless environment you can use a package such as JSDom to parse the HTML string.
-    const dom = new JSDOM(htmlString)
-
-    // Once you have the DOM instance it's easy to generate LexicalNodes.
-    const nodes = $generateNodesFromDOM(headlessEditor, dom.window.document)
-
-    // Select the root
-    $getRoot().select()
-
-    // Insert them at a selection.
-    const selection = $getSelection()
-    selection.insertNodes(nodes)
-  },
-  { discrete: true },
-)
-
-// Do this if you then want to get the editor JSON
-const editorJSON = headlessEditor.getEditorState().toJSON()
+const html = convertHTMLToLexical({
+  editorConfig: await editorConfigFactory.default({
+    config, // <= make sure you have access to your Payload Config
+  }),
+  html: '<p>text</p>',
+  JSDOM, // pass the JSDOM import. As it's a relatively large package, richtext-lexical does not include it by default.
+})
 ```
 
-Functions prefixed with a `$` can only be run inside an `editor.update()` or `editorState.read()` callback.
-
-This has been taken from the [lexical serialization & deserialization docs](https://lexical.dev/docs/concepts/serialization#html---lexical).
-
-<Banner type="success">
-  **Note:**
-
-  Using the `discrete: true` flag ensures instant updates to the editor state. If
-  immediate reading of the updated state isn't necessary, you can omit the flag.
-</Banner>
-
 ## Markdown => Lexical
 
 Convert markdown content to the Lexical editor format with the following:
@@ -516,6 +492,17 @@ headlessEditor.update(
 const editorJSON = headlessEditor.getEditorState().toJSON()
 ```
 
+Functions prefixed with a `$` can only be run inside an `editor.update()` or `editorState.read()` callback.
+
+This has been taken from the [lexical serialization & deserialization docs](https://lexical.dev/docs/concepts/serialization#html---lexical).
+
+<Banner type="success">
+  **Note:**
+
+  Using the `discrete: true` flag ensures instant updates to the editor state. If
+  immediate reading of the updated state isn't necessary, you can omit the flag.
+</Banner>
+
 ## Lexical => Markdown
 
 Export content from the Lexical editor into Markdown format using these steps:
@@ -564,7 +551,6 @@ Here's the code for it:
 
 ```ts
 import type { SerializedEditorState } from '@payloadcms/richtext-lexical/lexical'
-
 import { $getRoot } from '@payloadcms/richtext-lexical/lexical'
 
 const yourEditorState: SerializedEditorState // <= your current editor state here

packages/richtext-lexical/src/features/converters/htmlToLexical/index.ts

@@ -0,0 +1,50 @@
+import { createHeadlessEditor } from '@lexical/headless'
+import { $getRoot, $getSelection, type SerializedLexicalNode } from 'lexical'
+
+import type { SanitizedServerEditorConfig } from '../../../lexical/config/types.js'
+import type { DefaultNodeTypes, TypedEditorState } from '../../../nodeTypes.js'
+
+import {} from '../../../lexical/config/server/sanitize.js'
+import { getEnabledNodes } from '../../../lexical/nodes/index.js'
+import { $generateNodesFromDOM } from '../../../lexical-proxy/@lexical-html.js'
+
+export const convertHTMLToLexical = <TNodeTypes extends SerializedLexicalNode = DefaultNodeTypes>({
+  editorConfig,
+  html,
+  JSDOM,
+}: {
+  editorConfig: SanitizedServerEditorConfig
+  html: string
+  JSDOM: new (html: string) => {
+    window: {
+      document: Document
+    }
+  }
+}): TypedEditorState<TNodeTypes> => {
+  const headlessEditor = createHeadlessEditor({
+    nodes: getEnabledNodes({
+      editorConfig,
+    }),
+  })
+
+  headlessEditor.update(
+    () => {
+      const dom = new JSDOM(html)
+
+      const nodes = $generateNodesFromDOM(headlessEditor, dom.window.document)
+
+      $getRoot().select()
+
+      const selection = $getSelection()
+      if (selection === null) {
+        throw new Error('Selection is null')
+      }
+      selection.insertNodes(nodes)
+    },
+    { discrete: true },
+  )
+
+  const editorJSON = headlessEditor.getEditorState().toJSON()
+
+  return editorJSON as TypedEditorState<TNodeTypes>
+}

packages/richtext-lexical/src/index.ts

@@ -886,48 +886,49 @@ export {
   HTMLConverterFeature,
   type HTMLConverterFeatureProps,
 } from './features/converters/html/index.js'
+export { convertHTMLToLexical } from './features/converters/htmlToLexical/index.js'
 export { TestRecorderFeature } from './features/debug/testRecorder/server/index.js'
 export { TreeViewFeature } from './features/debug/treeView/server/index.js'
 export { EXPERIMENTAL_TableFeature } from './features/experimental_table/server/index.js'
 export { BoldFeature } from './features/format/bold/feature.server.js'
 export { InlineCodeFeature } from './features/format/inlineCode/feature.server.js'
-export { ItalicFeature } from './features/format/italic/feature.server.js'
 
+export { ItalicFeature } from './features/format/italic/feature.server.js'
 export { StrikethroughFeature } from './features/format/strikethrough/feature.server.js'
 export { SubscriptFeature } from './features/format/subscript/feature.server.js'
 export { SuperscriptFeature } from './features/format/superscript/feature.server.js'
 export { UnderlineFeature } from './features/format/underline/feature.server.js'
 export { HeadingFeature, type HeadingFeatureProps } from './features/heading/server/index.js'
 export { HorizontalRuleFeature } from './features/horizontalRule/server/index.js'
+
 export { IndentFeature } from './features/indent/server/index.js'
 
 export { AutoLinkNode } from './features/link/nodes/AutoLinkNode.js'
-
 export { LinkNode } from './features/link/nodes/LinkNode.js'
 export type { LinkFields } from './features/link/nodes/types.js'
 export { LinkFeature, type LinkFeatureServerProps } from './features/link/server/index.js'
 export { ChecklistFeature } from './features/lists/checklist/server/index.js'
 export { OrderedListFeature } from './features/lists/orderedList/server/index.js'
+
 export { UnorderedListFeature } from './features/lists/unorderedList/server/index.js'
 
 export type {
   SlateNode,
   SlateNodeConverter,
 } from './features/migrations/slateToLexical/converter/types.js'
-
 export { ParagraphFeature } from './features/paragraph/server/index.js'
 export {
   RelationshipFeature,
   type RelationshipFeatureProps,
 } from './features/relationship/server/index.js'
+
 export {
   type RelationshipData,
   RelationshipServerNode,
 } from './features/relationship/server/nodes/RelationshipNode.js'
-
 export { FixedToolbarFeature } from './features/toolbars/fixed/server/index.js'
-export { InlineToolbarFeature } from './features/toolbars/inline/server/index.js'
 
+export { InlineToolbarFeature } from './features/toolbars/inline/server/index.js'
 export type { ToolbarGroup, ToolbarGroupItem } from './features/toolbars/types.js'
 export type {
   BaseClientFeatureProps,
@@ -942,6 +943,7 @@ export type {
   SanitizedClientFeatures,
   SanitizedPlugin,
 } from './features/typesClient.js'
+
 export type {
   AfterChangeNodeHook,
   AfterChangeNodeHookArgs,
@@ -967,37 +969,36 @@ export type {
 export { createNode } from './features/typeUtilities.js' // Only useful in feature.server.ts
 
 export { UploadFeature } from './features/upload/server/feature.server.js'
-
 export type { UploadFeatureProps } from './features/upload/server/feature.server.js'
-export { type UploadData, UploadServerNode } from './features/upload/server/nodes/UploadNode.js'
 
+export { type UploadData, UploadServerNode } from './features/upload/server/nodes/UploadNode.js'
 export type { EditorConfigContextType } from './lexical/config/client/EditorConfigProvider.js'
+
 export {
   defaultEditorConfig,
   defaultEditorFeatures,
   defaultEditorLexicalConfig,
 } from './lexical/config/server/default.js'
-
 export { loadFeatures, sortFeaturesForOptimalLoading } from './lexical/config/server/loader.js'
+
 export {
   sanitizeServerEditorConfig,
   sanitizeServerFeatures,
 } from './lexical/config/server/sanitize.js'
-
 export type {
   ClientEditorConfig,
   SanitizedClientEditorConfig,
   SanitizedServerEditorConfig,
   ServerEditorConfig,
 } from './lexical/config/types.js'
-export { getEnabledNodes, getEnabledNodesFromServerNodes } from './lexical/nodes/index.js'
 export type { AdapterProps }
 
+export { getEnabledNodes, getEnabledNodesFromServerNodes } from './lexical/nodes/index.js'
+
 export type {
   SlashMenuGroup,
   SlashMenuItem,
 } from './lexical/plugins/SlashMenu/LexicalTypeaheadMenuPlugin/types.js'
-
 export {
   DETAIL_TYPE_TO_DETAIL,
   DOUBLE_LINE_BREAK,
@@ -1012,26 +1013,26 @@ export {
   TEXT_TYPE_TO_FORMAT,
   TEXT_TYPE_TO_MODE,
 } from './lexical/utils/nodeFormat.js'
+
 export { sanitizeUrl, validateUrl } from './lexical/utils/url.js'
 
 export type * from './nodeTypes.js'
 
 export { $convertFromMarkdownString } from './packages/@lexical/markdown/index.js'
-
 export { defaultRichTextValue } from './populateGraphQL/defaultValue.js'
 export { populate } from './populateGraphQL/populate.js'
+
 export type { LexicalEditorProps, LexicalFieldAdminProps, LexicalRichTextAdapter } from './types.js'
 
 export { createServerFeature } from './utilities/createServerFeature.js'
-
 export { editorConfigFactory } from './utilities/editorConfigFactory.js'
 export type { FieldsDrawerProps } from './utilities/fieldsDrawer/Drawer.js'
 export { extractPropsFromJSXPropsString } from './utilities/jsx/extractPropsFromJSXPropsString.js'
+
 export {
   extractFrontmatter,
   frontmatterToObject,
   objectToFrontmatter,
   propsToJSXString,
 } from './utilities/jsx/jsx.js'
-
 export { upgradeLexicalData } from './utilities/upgradeLexicalData/index.js'