Connnect gutenberg widgets screen to widget area endpoints

packages/core-data/src/entities.js

@@ -15,6 +15,7 @@ export const defaultEntities = [
 	{ name: 'postType', kind: 'root', key: 'slug', baseURL: '/wp/v2/types' },
 	{ name: 'media', kind: 'root', baseURL: '/wp/v2/media', plural: 'mediaItems' },
 	{ name: 'taxonomy', kind: 'root', key: 'slug', baseURL: '/wp/v2/taxonomies', plural: 'taxonomies' },
+	{ name: 'widgetArea', kind: 'root', baseURL: '/__experimental/widget-areas', plural: 'widgetAreas' },
 ];
 
 export const kinds = [

packages/edit-widgets/src/components/edit-widgets-initializer/index.js

@@ -0,0 +1,27 @@
+/**
+ * WordPress dependencies
+ */
+import { compose } from '@wordpress/compose';
+import { useEffect } from '@wordpress/element';
+import { withDispatch } from '@wordpress/data';
+
+/**
+ * Internal dependencies
+ */
+import Layout from '../layout';
+
+function EditWidgetsInitializer( { setupWidgetAreas } ) {
+	useEffect( () => {
+		setupWidgetAreas();
+	}, [] );
+	return <Layout />;
+}
+
+export default compose( [
+	withDispatch( ( dispatch ) => {
+		const { setupWidgetAreas } = dispatch( 'core/edit-widgets' );
+		return {
+			setupWidgetAreas,
+		};
+	} ),
+] )( EditWidgetsInitializer );

packages/edit-widgets/src/components/header/index.js

@@ -1,10 +1,12 @@
 /**
  * WordPress dependencies
  */
+import { compose } from '@wordpress/compose';
 import { Button } from '@wordpress/components';
 import { __ } from '@wordpress/i18n';
+import { withDispatch } from '@wordpress/data';
 
-function Header() {
+function Header( { saveWidgetAreas } ) {
 	return (
 		<div
 			className="edit-widgets-header"
@@ -17,12 +19,20 @@ function Header() {
 			</h1>
 
 			<div className="edit-widgets-header__actions">
-				<Button isPrimary isLarge>
+				<Button isPrimary isLarge onClick={ saveWidgetAreas }>
 					{ __( 'Update' ) }
 				</Button>
 			</div>
 		</div>
 	);
 }
 
-export default Header;
+export default compose( [
+	withDispatch( ( dispatch ) => {
+		const { saveWidgetAreas } = dispatch( 'core/edit-widgets' );
+		return {
+			saveWidgetAreas,
+		};
+	} ),
+] )( Header );
+

packages/edit-widgets/src/components/layout/index.js

@@ -9,15 +9,9 @@ import { navigateRegions } from '@wordpress/components';
  */
 import Header from '../header';
 import Sidebar from '../sidebar';
-import WidgetArea from '../widget-area';
+import WidgetAreas from '../widget-areas';
 
 function Layout() {
-	const areas = [
-		__( 'Sidebar' ),
-		__( 'Footer' ),
-		__( 'Header' ),
-	];
-
 	return (
 		<>
 			<Header />
@@ -28,11 +22,7 @@ function Layout() {
 				aria-label={ __( 'Widgets screen content' ) }
 				tabIndex="-1"
 			>
-				{ areas.map( ( area, index ) => (
-					<div key={ index } className="edit-widgets-layout__area">
-						<WidgetArea title={ area } initialOpen={ index === 0 } />
-					</div>
-				) ) }
+				<WidgetAreas />
 			</div>
 		</>
 	);

packages/edit-widgets/src/components/layout/style.scss

@@ -9,8 +9,3 @@
 		margin-top: $header-height;
 	}
 }
-
-.edit-widgets-layout__area {
-	max-width: $content-width;
-	margin: 0 auto 30px;
-}

packages/edit-widgets/src/components/widget-area/index.js

@@ -1,20 +1,24 @@
 /**
  * WordPress dependencies
  */
+import { compose } from '@wordpress/compose';
 import { Panel, PanelBody } from '@wordpress/components';
 import {
 	BlockEditorProvider,
 	BlockList,
 } from '@wordpress/block-editor';
-import { useState } from '@wordpress/element';
-
-function WidgetArea( { title, initialOpen } ) {
-	const [ blocks, updateBlocks ] = useState( [] );
+import { withDispatch, withSelect } from '@wordpress/data';
 
+function WidgetArea( {
+	blocks,
+	initialOpen,
+	updateBlocks,
+	widgetAreaName,
+} ) {
 	return (
-		<Panel>
+		<Panel className="edit-widgets-widget-area">
 			<PanelBody
-				title={ title }
+				title={ widgetAreaName }
 				initialOpen={ initialOpen }
 			>
 				<BlockEditorProvider
@@ -29,4 +33,25 @@ function WidgetArea( { title, initialOpen } ) {
 	);
 }
 
-export default WidgetArea;
+export default compose( [
+	withSelect( ( select, { id } ) => {
+		const {
+			getBlocksFromWidgetArea,
+			getWidgetArea,
+		} = select( 'core/edit-widgets' );
+		const blocks = getBlocksFromWidgetArea( id );
+		const widgetAreaName = ( getWidgetArea( id ) || {} ).name;
+		return {
+			blocks,
+			widgetAreaName,
+		};
+	} ),
+	withDispatch( ( dispatch, { id } ) => {
+		return {
+			updateBlocks( blocks ) {
+				const { updateBlocksInWidgetArea } = dispatch( 'core/edit-widgets' );
+				updateBlocksInWidgetArea( id, blocks );
+			},
+		};
+	} ),
+] )( WidgetArea );

packages/edit-widgets/src/components/widget-area/style.scss

@@ -0,0 +1,4 @@
+.edit-widgets-widget-area {
+	max-width: $content-width;
+	margin: 0 auto 30px;
+}

packages/edit-widgets/src/components/widget-areas/index.js

@@ -0,0 +1,30 @@
+/**
+ * WordPress dependencies
+ */
+import { compose } from '@wordpress/compose';
+import { withSelect } from '@wordpress/data';
+
+/**
+ * Internal dependencies
+ */
+import WidgetArea from '../widget-area';
+
+function WidgetAreas( { areas } ) {
+	return areas.map( ( { id }, index ) => (
+		<WidgetArea
+			key={ id }
+			id={ id }
+			initialOpen={ index === 0 }
+		/>
+	) );
+}
+
+export default compose( [
+	withSelect( ( select ) => {
+		const { getWidgetAreas } = select( 'core/edit-widgets' );
+		const areas = getWidgetAreas();
+		return {
+			areas,
+		};
+	} ),
+] )( WidgetAreas );

packages/edit-widgets/src/index.js

@@ -7,7 +7,8 @@ import { registerCoreBlocks } from '@wordpress/block-library';
 /**
  * Internal dependencies
  */
-import Layout from './components/layout';
+import './store';
+import EditWidgetsInitializer from './components/edit-widgets-initializer';
 
 /**
  * Initilizes the widgets screen
@@ -17,7 +18,7 @@ import Layout from './components/layout';
 export function initialize( id ) {
 	registerCoreBlocks();
 	render(
-		<Layout />,
+		<EditWidgetsInitializer />,
 		document.getElementById( id )
 	);
 }

packages/edit-widgets/src/store/actions.js

@@ -0,0 +1,76 @@
+/**
+ * External dependencies
+ */
+import { get, map } from 'lodash';
+
+/**
+ * WordPress dependencies
+ */
+import { parse, serialize } from '@wordpress/blocks';
+import { dispatch, select } from '@wordpress/data-controls';
+
+/**
+ * Yields an action object that setups the widget areas.
+ *
+ * @yields {Object} Action object.
+ */
+export function* setupWidgetAreas() {
+	const widgetAreas = yield select(
+		'core',
+		'getEntityRecords',
+		'root',
+		'widgetArea'
+	);
+	yield {
+		type: 'SETUP_WIDGET_AREAS',
+		widgetAreas: map( widgetAreas, ( { content, ...widgetAreaProperties } ) => {
+			return {
+				...widgetAreaProperties,
+				blocks: parse( get( content, [ 'raw' ], '' ) ),
+			};
+		} ),
+	};
+}
+
+/**
+ * Returns an action object used to update the blocks in a specific widget area.
+ *
+ * @param {string}   widgetAreaId Id of the widget area.
+ * @param {Object[]} blocks       Array of blocks that should be part of the widget area.
+ *
+ * @return {Object} Action object.
+ */
+export function updateBlocksInWidgetArea( widgetAreaId, blocks = [] ) {
+	return {
+		type: 'UPDATE_BLOCKS_IN_WIDGET_AREA',
+		widgetAreaId,
+		blocks,
+	};
+}
+
+/**
+ * Action that performs the logic to save widget areas.
+ *
+ * @yields {Object} Action object.
+ */
+export function* saveWidgetAreas() {
+	const widgetAreas = yield select(
+		'core/edit-widgets',
+		'getWidgetAreas',
+	);
+	for ( const { id } of widgetAreas ) {
+		const blocks = yield select(
+			'core/edit-widgets',
+			'getBlocksFromWidgetArea',
+			id
+		);
+		yield dispatch(
+			'core',
+			'saveWidgetArea',
+			{
+				id,
+				content: serialize( blocks ),
+			}
+		);
+	}
+}

packages/edit-widgets/src/store/constants.js

@@ -0,0 +1,6 @@
+/**
+ * Constant for the store module (or reducer) key.
+ * @type {string}
+ */
+export const STORE_KEY = 'core/edit-widgets';
+

packages/edit-widgets/src/store/index.js

@@ -0,0 +1,23 @@
+/**
+ * WordPress dependencies
+ */
+import { registerStore } from '@wordpress/data';
+import { controls } from '@wordpress/data-controls';
+
+/**
+ * Internal dependencies
+ */
+import reducer from './reducer';
+import * as actions from './actions';
+import * as selectors from './selectors';
+
+const store = registerStore( 'core/edit-widgets', {
+	reducer,
+	actions,
+	selectors,
+	controls,
+} );
+
+store.dispatch( { type: 'INIT' } );
+
+export default store;