usePostFields: take them from the registry

packages/editor/src/components/post-fields/index.ts

@@ -1,22 +1,18 @@
 /**
  * WordPress dependencies
  */
-import { useMemo } from '@wordpress/element';
+import { useEffect, useMemo } from '@wordpress/element';
 import { useEntityRecords } from '@wordpress/core-data';
+import { useDispatch, useSelect } from '@wordpress/data';
 import type { Field } from '@wordpress/dataviews';
-import {
-	featuredImageField,
-	slugField,
-	parentField,
-	passwordField,
-	statusField,
-	commentStatusField,
-	titleField,
-	dateField,
-	authorField,
-} from '@wordpress/fields';
 import type { BasePostWithEmbeddedAuthor } from '@wordpress/fields';
 
+/**
+ * Internal dependencies
+ */
+import { unlock } from '../../lock-unlock';
+import { store as editorStore } from '../../store';
+
 interface UsePostFieldsReturn {
 	isLoading: boolean;
 	fields: Field< BasePostWithEmbeddedAuthor >[];
@@ -28,29 +24,44 @@ interface Author {
 }
 
 function usePostFields(): UsePostFieldsReturn {
+	const postType = 'page'; // TODO: this could be page or post (experimental).
+
+	const { registerPostTypeFields } = unlock( useDispatch( editorStore ) );
+	useEffect( () => {
+		registerPostTypeFields( postType );
+	}, [ registerPostTypeFields, postType ] );
+
+	const { defaultFields } = useSelect(
+		( select ) => {
+			const { getEntityFields } = unlock( select( editorStore ) );
+			return {
+				defaultFields: getEntityFields( 'postType', postType ),
+			};
+		},
+		[ postType ]
+	);
+
 	const { records: authors, isResolving: isLoadingAuthors } =
 		useEntityRecords< Author >( 'root', 'user', { per_page: -1 } );
 
 	const fields = useMemo(
 		() =>
-			[
-				featuredImageField,
-				titleField,
-				{
-					...authorField,
-					elements: authors?.map( ( { id, name } ) => ( {
-						value: id,
-						label: name,
-					} ) ),
-				},
-				statusField,
-				dateField,
-				slugField,
-				parentField,
-				commentStatusField,
-				passwordField,
-			] as Field< BasePostWithEmbeddedAuthor >[],
-		[ authors ]
+			defaultFields.map(
+				( field: Field< BasePostWithEmbeddedAuthor > ) => {
+					if ( field.id === 'author' ) {
+						return {
+							...field,
+							elements: authors?.map( ( { id, name } ) => ( {
+								value: id,
+								label: name,
+							} ) ),
+						};
+					}
+
+					return field;
+				}
+			) as Field< BasePostWithEmbeddedAuthor >[],
+		[ authors, defaultFields ]
 	);
 
 	return {