gutenberg / lib / experimental / knowledge / knowledge.php

knowledge.php in Gutenberg 23.6.0, at lib/experimental/knowledge/knowledge.php

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1	<?php
2	/**
3	* Knowledge public API.
4	*
5	* @package gutenberg
6	*/
7
8	if ( ! defined( 'ABSPATH' ) ) {
9	exit;
10	}
11
12	if ( ! function_exists( 'wp_knowledge_types' ) ) {
13	/**
14	* Returns the registered knowledge types keyed by slug.
15	*
16	* Plugins can register their own types via the `wp_knowledge_types` filter.
17	*
18	* @return array {
19	* Slug-keyed map of knowledge types.
20	*
21	* @type array ...$0 {
22	* Data for a single knowledge type.
23	*
24	* @type string $title The human-readable label for the type.
25	* }
26	* }
27	* @phpstan-return array<string, array{title: string}>
28	*/
29	function wp_knowledge_types(): array {
30	/**
31	* Filters the knowledge types available on this site.
32	*
33	* @param array $types {
34	* Slug-keyed map of knowledge types.
35	*
36	* @type array ...$0 {
37	* Data for a single knowledge type.
38	*
39	* @type string $title The human-readable label for the type.
40	* }
41	* }
42	* @phpstan-param array<string, array{title: string}> $types
43	*/
44	return apply_filters(
45	'wp_knowledge_types',
46	array(
47	'guideline' => array(
48	'title' => _x( 'Guideline', 'knowledge type', 'gutenberg' ),
49	),
50	'memory' => array(
51	'title' => _x( 'Memory', 'knowledge type', 'gutenberg' ),
52	),
53	'note' => array(
54	'title' => _x( 'Note', 'knowledge type', 'gutenberg' ),
55	),
56	)
57	);
58	}
59	}
60
61	if ( ! function_exists( 'wp_guideline_scopes' ) ) {
62	/**
63	* Returns the registered guideline scopes keyed by slug.
64	*
65	* Scopes are the sections shown on the Settings → Guidelines page. Each
66	* scope is backed by at most one `guideline`-typed `wp_knowledge` row whose
67	* slug is `guideline-{scope}`. Plugins can register their own scopes via the
68	* `wp_guideline_scopes` filter and the Settings page grows a section
69	* automatically. The registry carries identity and presentation only; rows
70	* are created on first save.
71	*
72	* The `blocks` scope is the one exception: it has no single `guideline-blocks`
73	* row. Its section lists per-block guidelines stored as `guideline-block-*`
74	* rows. Removing it from this registry (via the filter) hides that section on
75	* the Settings page.
76	*
77	* @return array {
78	* Slug-keyed map of guideline scopes.
79	*
80	* @type array ...$0 {
81	* Data for a single scope.
82	*
83	* @type string $title Human-readable section title.
84	* @type string $description Human-readable section description.
85	* @type int $order Sort order on the Settings page.
86	* }
87	* }
88	* @phpstan-return array<string, array{title: string, description: string, order: int}>
89	*/
90	function wp_guideline_scopes(): array {
91	/**
92	* Filters the guideline scopes available on this site.
93	*
94	* @param array $scopes Slug-keyed map of guideline scopes.
95	*/
96	return apply_filters(
97	'wp_guideline_scopes',
98	array(
99	'site' => array(
100	'title' => __( 'Site', 'gutenberg' ),
101	'description' => __( "Describe your site's purpose, goals, and primary audience.", 'gutenberg' ),
102	'order' => 10,
103	),
104	'copy' => array(
105	'title' => __( 'Copy', 'gutenberg' ),
106	'description' => __( 'Set your writing standards for tone, voice, style, and formatting.', 'gutenberg' ),
107	'order' => 20,
108	),
109	'images' => array(
110	'title' => __( 'Images', 'gutenberg' ),
111	'description' => __( 'Outline your style, dimensions, formats, mood and aesthetic preferences.', 'gutenberg' ),
112	'order' => 30,
113	),
114	'blocks' => array(
115	'title' => __( 'Blocks', 'gutenberg' ),
116	'description' => __( 'Create tailored guidelines for specific block types.', 'gutenberg' ),
117	'order' => 40,
118	),
119	'additional' => array(
120	'title' => __( 'Additional', 'gutenberg' ),
121	'description' => __( 'Add additional guidelines.', 'gutenberg' ),
122	'order' => 50,
123	),
124	)
125	);
126	}
127	}
128
129	if ( ! function_exists( 'wp_guideline_max_length' ) ) {
130	/**
131	* Returns the maximum length, in characters, of a guideline row's content.
132	*
133	* @return int Maximum number of characters allowed in guideline content.
134	*/
135	function wp_guideline_max_length(): int {
136	/**
137	* Filters the maximum length, in characters, of a guideline row's content.
138	*
139	* @param int $max_length Maximum number of characters. Default 5000.
140	*/
141	return (int) apply_filters( 'wp_guideline_max_length', 5000 );
142	}
143	}
144
145	if ( ! function_exists( 'wp_knowledge_get_or_create_type_term' ) ) {
146	/**
147	* Resolve a `wp_knowledge_type` term by slug, creating it lazily.
148	*
149	* Created term names are written once in the site locale (via
150	* `wp_knowledge_maybe_map_term_label`) so they don't vary with whoever
151	* triggered creation.
152	*
153	* @access private
154	*
155	* @param string $slug Term slug.
156	* @return int\|null Term ID, or null on failure.
157	*/
158	function wp_knowledge_get_or_create_type_term( string $slug ): ?int {
159	$term = term_exists( $slug, 'wp_knowledge_type' );
160	if ( $term ) {
161	return (int) $term['term_id'];
162	}
163
164	$switched = switch_to_locale( get_locale() );
165	$term = wp_insert_term( $slug, 'wp_knowledge_type' );
166	if ( $switched ) {
167	restore_previous_locale();
168	}
169
170	if ( is_wp_error( $term ) ) {
171	return null;
172	}
173
174	return (int) $term['term_id'];
175	}
176	}
177
178	if ( ! function_exists( 'wp_knowledge_ensure_default_type_term' ) ) {
179	/**
180	* Hook callback for the `save_post_wp_knowledge` action that assigns the
181	* knowledge type term.
182	*
183	* Rows whose slug begins with `guideline-` are forced onto the `guideline`
184	* type (the reservation rule: the prefix is reserved for guideline-typed
185	* rows). Any other row without a type term falls back to `note`.
186	*
187	* @access private
188	*
189	* @param int $post_id Saved post ID.
190	*/
191	function wp_knowledge_ensure_default_type_term( int $post_id ): void {
192	if ( wp_is_post_revision( $post_id ) ) {
193	return;
194	}
195
196	$post = get_post( $post_id );
197	if ( ! $post instanceof WP_Post ) {
198	return;
199	}
200
201	if ( str_starts_with( $post->post_name, 'guideline-' ) ) {
202	$term_id = wp_knowledge_get_or_create_type_term( 'guideline' );
203	if ( null !== $term_id ) {
204	wp_set_object_terms( $post_id, $term_id, 'wp_knowledge_type' );
205	}
206	return;
207	}
208
209	$terms = get_the_terms( $post_id, 'wp_knowledge_type' );
210	if ( is_wp_error( $terms ) \|\| ! empty( $terms ) ) {
211	return;
212	}
213
214	$term_id = wp_knowledge_get_or_create_type_term( 'note' );
215	if ( null !== $term_id ) {
216	wp_set_object_terms( $post_id, $term_id, 'wp_knowledge_type' );
217	}
218	}
219	}
220
221	if ( ! function_exists( 'wp_maybe_grant_knowledge_caps' ) ) {
222	/**
223	* Filters the user capabilities to grant the `wp_knowledge` post type capabilities as necessary.
224	*
225	* The `wp_knowledge` post type uses a `knowledge`-prefixed capability set that
226	* is granted dynamically rather than stored on roles. Administrators (users
227	* with `manage_options`) receive every knowledge capability. Contributors,
228	* authors, and editors (users with `edit_posts`) may list and create knowledge
229	* rows and fully manage their own private rows. Publishing knowledge and acting
230	* on other users' rows is reserved for administrators. Subscribers receive
231	* nothing and are stopped at the post-type door by the `read_knowledge_items` mapping.
232	*
233	* @param bool[] $allcaps An array of all the user's capabilities.
234	* @param string[] $caps Required primitive capabilities for the requested capability.
235	* @param array $args Arguments that accompany the requested capability check.
236	* @param WP_User $user The user object.
237	* @return bool[] Filtered array of the user's capabilities.
238	*/
239	function wp_maybe_grant_knowledge_caps( $allcaps, $caps, $args, $user ) {
240	if ( ! empty( $allcaps['manage_options'] ) ) {
241	$allcaps['read_knowledge_items'] = true;
242	$allcaps['edit_knowledge_items'] = true;
243	$allcaps['edit_others_knowledge_items'] = true;
244	$allcaps['edit_published_knowledge_items'] = true;
245	$allcaps['edit_private_knowledge_items'] = true;
246	$allcaps['publish_knowledge_items'] = true;
247	$allcaps['delete_knowledge_items'] = true;
248	$allcaps['delete_others_knowledge_items'] = true;
249	$allcaps['delete_published_knowledge_items'] = true;
250	$allcaps['delete_private_knowledge_items'] = true;
251	$allcaps['read_private_knowledge_items'] = true;
252	return $allcaps;
253	}
254
255	if ( empty( $allcaps['edit_posts'] ) ) {
256	return $allcaps;
257	}
258
259	// Ambient floor for Contributor+: `read_knowledge_items` clears the
260	// post-type read check; `edit_knowledge_items` clears the create and
261	// ownership checks that don't pass a post ID. Per-post primitives
262	// are granted only in the per-post branch below.
263	$allcaps['read_knowledge_items'] = true;
264	$allcaps['edit_knowledge_items'] = true;
265
266	if ( ! isset( $args[0], $args[2] ) ) {
267	return $allcaps;
268	}
269
270	if ( ! in_array( $args[0], array( 'edit_post', 'delete_post', 'read_post' ), true ) ) {
271	return $allcaps;
272	}
273
274	$post = get_post( $args[2] );
275	if (
276	! $post instanceof WP_Post \|\|
277	'wp_knowledge' !== $post->post_type \|\|
278	(int) $post->post_author !== (int) $user->ID
279	) {
280	return $allcaps;
281	}
282
283	/*
284	* A trashed row keeps its pre-trash status in `_wp_trash_meta_status`.
285	* Resolve that effective status so the author keeps the ability to
286	* restore or permanently delete their own row once it is in the trash. A
287	* row trashed from a non-private status (only reachable for
288	* administrators) still falls outside the grant.
289	*/
290	$status = $post->post_status;
291	if ( 'trash' === $status ) {
292	$status = get_post_meta( $post->ID, '_wp_trash_meta_status', true );
293	}
294
295	if ( 'private' !== $status ) {
296	return $allcaps;
297	}
298
299	$allcaps['edit_private_knowledge_items'] = true;
300	$allcaps['delete_knowledge_items'] = true;
301	$allcaps['delete_private_knowledge_items'] = true;
302	$allcaps['read_private_knowledge_items'] = true;
303
304	return $allcaps;
305	}
306	}
307
308	if ( ! function_exists( 'wp_knowledge_maybe_map_term_label' ) ) {
309	/**
310	* Hook callback for the `wp_insert_term_data` filter that swaps a
311	* raw knowledge-type slug for its human-readable label when WordPress
312	* is about to lazily create the term.
313	*
314	* When `wp_set_object_terms()` is called with a slug that doesn't yet
315	* exist, `wp_insert_term()` fires and the filter runs after WP has
316	* computed both `name` and `slug`. A `name` equal to `slug` indicates
317	* the term was created from a raw slug (e.g. by `wp_set_object_terms()`)
318	* rather than from a user-provided label, so the label is replaced with
319	* the title from `wp_knowledge_types()`.
320	*
321	* @access private
322	*
323	* @param array $data Term data to be inserted (keyed by column name).
324	* @param string $taxonomy Taxonomy slug.
325	* @return array Possibly modified term data.
326	*/
327	function wp_knowledge_maybe_map_term_label( array $data, string $taxonomy ): array {
328	if ( 'wp_knowledge_type' !== $taxonomy ) {
329	return $data;
330	}
331
332	if ( $data['name'] !== $data['slug'] ) {
333	return $data;
334	}
335
336	$types = wp_knowledge_types();
337	if ( isset( $types[ $data['slug'] ] ) ) {
338	$data['name'] = $types[ $data['slug'] ]['title'];
339	}
340
341	return $data;
342	}
343	}
344
345	if ( ! function_exists( 'wp_guideline_scope_from_slug' ) ) {
346	/**
347	* Resolve the scope that owns a guideline row slug.
348	*
349	* Returns the scope key for a `guideline-{scope}` slug that matches a
350	* registered scope. A registered scope key always wins, so a scope keyed
351	* like `block-foo` resolves to itself rather than the blocks scope. Any
352	* other `guideline-block-*` slug is a per-block row that belongs to the
353	* `blocks` scope while it is registered. Returns null for the bare
354	* `guideline-block-` slug and for any unknown scope.
355	*
356	* @access private
357	*
358	* @param string $slug Post slug.
359	* @return string\|null Scope key, or null if the slug is not a registered scope.
360	*/
361	function wp_guideline_scope_from_slug( string $slug ): ?string {
362	if ( ! str_starts_with( $slug, 'guideline-' ) ) {
363	return null;
364	}
365
366	$scopes = wp_guideline_scopes();
367	$scope = substr( $slug, strlen( 'guideline-' ) );
368
369	// A slug that matches a registered scope key is that scope. Checking this
370	// first lets a scope keyed like `block-foo` win over the per-block
371	// namespace below, instead of being swallowed by the blocks scope.
372	if ( isset( $scopes[ $scope ] ) ) {
373	return $scope;
374	}
375
376	// Otherwise a `guideline-block-<name>` row is a per-block row that belongs
377	// to the blocks scope while it is registered. A real block name never
378	// equals a registered scope key, so the check above stays safe.
379	if ( str_starts_with( $slug, 'guideline-block-' ) && strlen( $slug ) > strlen( 'guideline-block-' ) ) {
380	return isset( $scopes['blocks'] ) ? 'blocks' : null;
381	}
382
383	return null;
384	}
385	}
386
387	if ( ! function_exists( 'wp_knowledge_guard_guideline_row' ) ) {
388	/**
389	* Hook callback for `rest_pre_insert_wp_knowledge` that sanitizes and
390	* normalizes guideline rows on the REST insert path.
391	*
392	* Only rows whose slug maps to a registered guideline scope are shaped (see
393	* `wp_guideline_scope_from_slug()`); any other row is left untouched. For a
394	* recognized guideline row this callback:
395	* - Sanitizes `post_content` to plain text capped at the guideline length.
396	* - Re-stamps the title of single-row registry scopes from
397	* `wp_guideline_scopes()` in the site locale. Per-block rows (the multi-row
398	* `blocks` scope) keep the client-provided canonical block name.
399	*
400	* Slug uniqueness is intentionally left to WordPress: the published row keeps
401	* its exact slug because the first save has no conflict and later saves reuse
402	* that row by ID, while any other row with the same desired slug is suffixed
403	* (`guideline-copy-2`) by `wp_unique_post_slug()`. The Settings page reads
404	* only the published row by its exact slug, so suffixed rows are ignored. The
405	* client save flow reclaims an existing same-slug row instead of creating a
406	* duplicate (see routes/guidelines/data.ts).
407	*
408	* @access private
409	*
410	* @param stdClass $prepared_post Prepared post object.
411	* @param WP_REST_Request $request Request object.
412	* @return stdClass Prepared post.
413	*/
414	function wp_knowledge_guard_guideline_row( $prepared_post, $request ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
415	$slug = '';
416	if ( ! empty( $prepared_post->post_name ) ) {
417	$slug = $prepared_post->post_name;
418	} elseif ( ! empty( $prepared_post->ID ) ) {
419	$existing = get_post( $prepared_post->ID );
420	if ( $existing instanceof WP_Post ) {
421	$slug = $existing->post_name;
422	}
423	}
424
425	// Only shape rows whose slug maps to a registered guideline scope.
426	$scope = wp_guideline_scope_from_slug( (string) $slug );
427	if ( null === $scope ) {
428	return $prepared_post;
429	}
430
431	// Sanitize content: plain text, capped at the guideline length.
432	if ( isset( $prepared_post->post_content ) ) {
433	$content = sanitize_textarea_field( $prepared_post->post_content );
434	$max = wp_guideline_max_length();
435	if ( mb_strlen( $content, 'UTF-8' ) > $max ) {
436	$content = mb_substr( $content, 0, $max, 'UTF-8' );
437	}
438	$prepared_post->post_content = $content;
439	}
440
441	// Re-stamp single-row registry scope titles in the site locale. The
442	// blocks scope is multi-row, so its per-block rows keep the
443	// client-provided canonical block name.
444	if ( 'blocks' !== $scope ) {
445	$switched = switch_to_locale( get_locale() );
446	$scopes = wp_guideline_scopes();
447	if ( $switched ) {
448	restore_previous_locale();
449	}
450	if ( isset( $scopes[ $scope ]['title'] ) ) {
451	$prepared_post->post_title = $scopes[ $scope ]['title'];
452	}
453	}
454
455	return $prepared_post;
456	}
457	}
458