Revert "Add: Modal to choose a start pattern on new templates. (#46248)"

This reverts commit ad9624a.

lib/compat/wordpress-6.1/rest-api.php

@@ -5,6 +5,22 @@
  * @package gutenberg
  */
 
+/**
+ * Update `wp_template` and `wp_template-part` post types to use
+ * Gutenberg's REST controller.
+ *
+ * @param array  $args Array of arguments for registering a post type.
+ * @param string $post_type Post type key.
+ */
+function gutenberg_update_templates_template_parts_rest_controller( $args, $post_type ) {
+	if ( in_array( $post_type, array( 'wp_template', 'wp_template-part' ), true ) ) {
+		$args['rest_controller_class'] = 'Gutenberg_REST_Templates_Controller';
+	}
+	return $args;
+}
+add_filter( 'register_post_type_args', 'gutenberg_update_templates_template_parts_rest_controller', 10, 2 );
+
+
 /**
  * Add the post type's `icon`(menu_icon) in the response.
  * When we backport this change we will need to add the

lib/compat/wordpress-6.2/rest-api.php

@@ -5,21 +5,6 @@
  * @package gutenberg
  */
 
-/**
- * Update `wp_template` and `wp_template-part` post types to use
- * Gutenberg's REST controller.
- *
- * @param array  $args Array of arguments for registering a post type.
- * @param string $post_type Post type key.
- */
-function gutenberg_update_templates_template_parts_rest_controller( $args, $post_type ) {
-	if ( in_array( $post_type, array( 'wp_template', 'wp_template-part' ), true ) ) {
-		$args['rest_controller_class'] = 'Gutenberg_REST_Templates_Controller_6_2';
-	}
-	return $args;
-}
-add_filter( 'register_post_type_args', 'gutenberg_update_templates_template_parts_rest_controller', 10, 2 );
-
 /**
  * Registers the block pattern categories REST API routes.
  */

lib/load.php

@@ -44,7 +44,6 @@ function gutenberg_is_experiment_enabled( $name ) {
 	require_once __DIR__ . '/compat/wordpress-6.2/class-gutenberg-rest-block-patterns-controller-6-2.php';
 	require_once __DIR__ . '/compat/wordpress-6.2/class-gutenberg-rest-block-pattern-categories-controller.php';
 	require_once __DIR__ . '/compat/wordpress-6.2/class-gutenberg-rest-pattern-directory-controller-6-2.php';
-	require_once __DIR__ . '/compat/wordpress-6.2/class-gutenberg-rest-templates-controller-6-2.php';
 	require_once __DIR__ . '/compat/wordpress-6.2/rest-api.php';
 	require_once __DIR__ . '/compat/wordpress-6.2/block-patterns.php';
 	require_once __DIR__ . '/compat/wordpress-6.2/class-gutenberg-rest-global-styles-controller-6-2.php';

packages/edit-site/src/components/add-new-template/new-template.js

@@ -1,6 +1,8 @@
 /**
  * WordPress dependencies
  */
+import apiFetch from '@wordpress/api-fetch';
+import { addQueryArgs } from '@wordpress/url';
 import {
 	DropdownMenu,
 	MenuGroup,
@@ -107,7 +109,19 @@ export default function NewTemplate( {
 		}
 		setIsCreatingTemplate( true );
 		try {
-			const { title, description, slug } = template;
+			const { title, description, slug, templatePrefix } = template;
+			let templateContent = template.content;
+			// Try to find fallback content from existing templates.
+			if ( ! templateContent ) {
+				const fallbackTemplate = await apiFetch( {
+					path: addQueryArgs( '/wp/v2/templates/lookup', {
+						slug,
+						is_custom: ! isWPSuggestion,
+						template_prefix: templatePrefix,
+					} ),
+				} );
+				templateContent = fallbackTemplate.content.raw;
+			}
 			const newTemplate = await saveEntityRecord(
 				'postType',
 				'wp_template',
@@ -117,6 +131,7 @@ export default function NewTemplate( {
 					slug: slug.toString(),
 					status: 'publish',
 					title,
+					content: templateContent,
 					// This adds a post meta field in template that is part of `is_custom` value calculation.
 					is_wp_suggestion: isWPSuggestion,
 				},

packages/edit-site/src/components/editor/index.js

@@ -29,7 +29,6 @@ import KeyboardShortcuts from '../keyboard-shortcuts';
 import InserterSidebar from '../secondary-sidebar/inserter-sidebar';
 import ListViewSidebar from '../secondary-sidebar/list-view-sidebar';
 import WelcomeGuide from '../welcome-guide';
-import StartTemplateOptions from '../start-template-options';
 import { store as editSiteStore } from '../../store';
 import { GlobalStylesRenderer } from '../global-styles-renderer';
 import { GlobalStylesProvider } from '../global-styles/global-styles-provider';
@@ -171,7 +170,6 @@ export default function Editor() {
 					<GlobalStylesProvider>
 						<BlockContextProvider value={ blockContext }>
 							<SidebarComplementaryAreaFills />
-							{ isEditMode && <StartTemplateOptions /> }
 							<InterfaceSkeleton
 								enableRegionNavigation={ false }
 								className={