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

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1	<?php
2	/**
3	* Dashboard Layout: server-side defaults.
4	*
5	* Allows plugins and themes to register a default dashboard layout
6	* that surfaces transparently through the `@wordpress/preferences`
7	* store for users who have not customized theirs.
8	*
9	* @package gutenberg
10	*/
11
12	/**
13	* Preferences scope under which the dashboard layout is stored.
14	* Mirrors the scope read by the JS surface.
15	*/
16	const GUTENBERG_DASHBOARD_LAYOUT_SCOPE = 'core/dashboard';
17
18	/**
19	* Preferences key under `GUTENBERG_DASHBOARD_LAYOUT_SCOPE` that holds
20	* the layout array.
21	*/
22	const GUTENBERG_DASHBOARD_LAYOUT_KEY = 'dashboardLayout';
23
24	/**
25	* Identifier of the bundled dashboard surface, formatted as
26	* `<plugin>_<page>` to match the underscore form produced by the
27	* wp-build pipeline (mirrors the `{{PREFIX}}_{{PAGE_SLUG_UNDERSCORE}}`
28	* pair used in generated page templates).
29	*
30	* Passed as context to `gutenberg_dashboard_default_layout` and used
31	* as the `{name}` segment of the REST default-layout route.
32	*/
33	const GUTENBERG_DASHBOARD_NAME = 'gutenberg_dashboard';
34
35	/**
36	* Injects a registered default dashboard layout into the user's
37	* `persisted_preferences` read when the stored layout is empty.
38	*
39	* Hooks into `get_user_metadata` so the default propagates through
40	* the same persistence layer the dashboard's JS surface reads from.
41	* The JS side stays oblivious: a default and a user-saved layout
42	* look identical at the preferences-store boundary.
43	*
44	* @param mixed $value The pre-fetched value, or null to let the
45	* meta API resolve normally.
46	* @param int $user_id User ID.
47	* @param string $meta_key Meta key being read.
48	* @return mixed The original value, or a single-element array
49	* containing the extended persisted preferences.
50	*/
51	function gutenberg_inject_dashboard_default_layout( $value, $user_id, $meta_key ) {
52	global $wpdb;
53
54	$expected_key = $wpdb->get_blog_prefix() . 'persisted_preferences';
55	if ( $meta_key !== $expected_key ) {
56	return $value;
57	}
58
59	// Avoid recursion when reading the user meta.
60	remove_filter( 'get_user_metadata', __FUNCTION__, 99 );
61	$base = get_user_meta( $user_id, $meta_key, true );
62	add_filter( 'get_user_metadata', __FUNCTION__, 99, 3 );
63
64	if ( ! is_array( $base ) ) {
65	$base = array();
66	}
67
68	$committed = isset( $base[ GUTENBERG_DASHBOARD_LAYOUT_SCOPE ][ GUTENBERG_DASHBOARD_LAYOUT_KEY ] )
69	? $base[ GUTENBERG_DASHBOARD_LAYOUT_SCOPE ][ GUTENBERG_DASHBOARD_LAYOUT_KEY ]
70	: array();
71
72	if ( ! empty( $committed ) ) {
73	return $value;
74	}
75
76	/**
77	* Filters the default dashboard layout served to users who have
78	* not customized theirs.
79	*
80	* Each entry should match the dashboard's widget instance shape:
81	* `uuid`, `type`, optional `attributes`, optional `placement`.
82	*
83	* @param array $default_layout Default array of widget instances.
84	* @param string $dashboard_name Identifier of the dashboard surface
85	* receiving the default. Callbacks
86	* targeting a specific dashboard
87	* should switch on this value.
88	*/
89	$default = apply_filters( 'gutenberg_dashboard_default_layout', array(), GUTENBERG_DASHBOARD_NAME );
90
91	if ( empty( $default ) \|\| ! is_array( $default ) ) {
92	return $value;
93	}
94
95	if ( ! isset( $base[ GUTENBERG_DASHBOARD_LAYOUT_SCOPE ] ) \|\| ! is_array( $base[ GUTENBERG_DASHBOARD_LAYOUT_SCOPE ] ) ) {
96	$base[ GUTENBERG_DASHBOARD_LAYOUT_SCOPE ] = array();
97	}
98
99	$base[ GUTENBERG_DASHBOARD_LAYOUT_SCOPE ][ GUTENBERG_DASHBOARD_LAYOUT_KEY ] = $default;
100
101	return array( $base );
102	}
103
104	add_filter( 'get_user_metadata', 'gutenberg_inject_dashboard_default_layout', 99, 3 );
105
106	/**
107	* Returns the default layout registered for a dashboard surface.
108	*
109	* Resolves `gutenberg_dashboard_default_layout` for the supplied
110	* dashboard name, returning a fresh evaluation of the filter chain
111	* each call. Used by the JS surface to back a "reset to default"
112	* action without depending on the user-meta hydration path.
113	*
114	* @param WP_REST_Request $request REST request carrying the
115	* dashboard name segment.
116	* @return WP_REST_Response Response wrapping the default layout
117	* array.
118	*/
119	function gutenberg_get_dashboard_default_layout( $request ) {
120	$name = $request['name'];
121	$default = apply_filters( 'gutenberg_dashboard_default_layout', array(), $name );
122
123	if ( ! is_array( $default ) ) {
124	$default = array();
125	}
126
127	return rest_ensure_response( array_values( $default ) );
128	}
129
130	/**
131	* Registers the REST route that exposes per-dashboard default layouts.
132	*/
133	function gutenberg_register_dashboard_default_layout_route() {
134	register_rest_route(
135	'wp/v2',
136	'/dashboards/(?P<name>[a-z][a-z0-9]*(?:_[a-z0-9]+)+)/default-layout',
137	array(
138	'methods' => WP_REST_Server::READABLE,
139	'callback' => 'gutenberg_get_dashboard_default_layout',
140	'permission_callback' => function () {
141	return current_user_can( 'read' );
142	},
143	'args' => array(
144	'name' => array(
145	'description' => __( 'Dashboard identifier as produced by the build pipeline.', 'gutenberg' ),
146	'type' => 'string',
147	),
148	),
149	)
150	);
151	}
152	add_action( 'rest_api_init', 'gutenberg_register_dashboard_default_layout_route' );
153