widget-types.php in Gutenberg 23.2.0, at lib/experimental/dashboard-widgets/widget-types.php

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1	<?php
2	/**
3	* Widget Types: server-side registry and REST exposure.
4	*
5	* Hydrates `WP_Widget_Type_Registry` from the build manifest at `init`,
6	* and exposes the registry to the client through the
7	* `/wp/v2/widget-modules` REST endpoint. The JS layer reads the endpoint
8	* via core-data and dynamically imports each widget's render module on
9	* the consumer side.
10	*
11	* @package gutenberg
12	*/
13
14	require_once __DIR__ . '/class-wp-widget-type.php';
15	require_once __DIR__ . '/class-wp-widget-type-registry.php';
16	require_once __DIR__ . '/class-wp-rest-widget-modules-controller.php';
17
18	/**
19	* Hydrates the widget type registry from the build manifest.
20	*
21	* Iterates the widgets discovered by the build pipeline (via
22	* `gutenberg_get_registered_widget_modules()`) and registers each one in
23	* `WP_Widget_Type_Registry`. The manifest is the single source of widget
24	* authorship in this codebase; this loop is a deterministic copy of it
25	* into the in-memory registry, with no filters in between.
26	*/
27	function gutenberg_register_widget_types() {
28	if ( ! function_exists( 'gutenberg_get_registered_widget_modules' ) ) {
29	return;
30	}
31
32	$registry = WP_Widget_Type_Registry::get_instance();
33
34	foreach ( gutenberg_get_registered_widget_modules() as $widget ) {
35	if ( empty( $widget['name'] ) \|\| $registry->is_registered( $widget['name'] ) ) {
36	continue;
37	}
38
39	$registry->register(
40	$widget['name'],
41	array(
42	'render_module' => $widget['render_module'] ?? null,
43	'widget_module' => $widget['widget_module'] ?? null,
44	)
45	);
46	}
47	}
48
49	if ( did_action( 'init' ) ) {
50	gutenberg_register_widget_types();
51	} else {
52	add_action( 'init', 'gutenberg_register_widget_types' );
53	}
54
55	/**
56	* Returns all widget types registered in the widget type registry.
57	*
58	* Convenience accessor around `WP_Widget_Type_Registry::get_all_registered()`
59	* for callers that prefer a function-based API.
60	*
61	* @return WP_Widget_Type[] Associative array of `$name => $widget_type`
62	* pairs.
63	*/
64	function gutenberg_get_registered_widget_types() {
65	return WP_Widget_Type_Registry::get_instance()->get_all_registered();
66	}
67
68	/**
69	* Registers the REST controller that exposes the widget type registry.
70	*/
71	function gutenberg_register_widget_modules_rest_controller() {
72	$controller = new WP_REST_Widget_Modules_Controller();
73	$controller->register_routes();
74	}
75	add_action( 'rest_api_init', 'gutenberg_register_widget_modules_rest_controller' );
76
77	/**
78	* Adds the registered widget modules to the dashboard page's boot
79	* dependencies.
80	*
81	* The wp-build page templates expose a generic
82	* `{page-id}-wp-admin_boot_dependencies` filter. The dashboard surface
83	* hooks it to make every registered widget render and metadata module
84	* available in the page's import map for dynamic `import()` calls.
85	*
86	* Both the render module and the metadata module are added as
87	* 'dynamic' dependencies so they are reachable from the import map but
88	* not eagerly executed.
89	*
90	* @param array $boot_dependencies Boot dependencies for the page.
91	* @return array Updated boot dependencies.
92	*/
93	function gutenberg_add_widget_modules_to_dashboard_boot_deps( $boot_dependencies ) {
94	foreach ( gutenberg_get_registered_widget_types() as $widget_type ) {
95	if ( $widget_type->render_module ) {
96	$boot_dependencies[] = array(
97	'import' => 'dynamic',
98	'id' => $widget_type->render_module,
99	);
100	}
101	if ( $widget_type->widget_module ) {
102	$boot_dependencies[] = array(
103	'import' => 'dynamic',
104	'id' => $widget_type->widget_module,
105	);
106	}
107	}
108
109	return $boot_dependencies;
110	}
111	add_filter( 'dashboard-wp-admin_boot_dependencies', 'gutenberg_add_widget_modules_to_dashboard_boot_deps' );
112