thinkrank / includes / seo / class-builder-content.php

class-builder-content.php in ThinkRank AI SEO – AI SEO Plugin for WordPress: Schema, XML Sitemaps, Meta Tags, Search Console & Local SEO trunk, at includes/seo/class-builder-content.php

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1	<?php
2	/**
3	* Page-builder content extraction.
4	*
5	* SEO analysis reads `post_content`, which is only the real text on a classic
6	* post. Page builders keep the words somewhere else, and every server-side
7	* scoring path — bulk analysis, the post-list SEO Overview column, the MCP
8	* abilities, cron reports — saw an empty page as a result:
9	*
10	* - Oxygen / Breakdance leave `post_content` completely EMPTY and store the
11	* node tree in postmeta. Nothing to render, nothing to strip: the analyzer
12	* reported "No content" on pages with well over a thousand visible words.
13	* - Elementor does the same via `_elementor_data`.
14	* - Divi 5 and Gutenberg do store block markup in `post_content`, but Divi
15	* keeps module text inside the block's JSON attributes — inside an HTML
16	* comment, which tag stripping removes wholesale.
17	* - Divi 4 and other shortcode builders keep text in shortcode attributes.
18	*
19	* Extraction reads the builder's own stored data rather than invoking its
20	* render engine. Rendering an Oxygen page outside a front-end request is slow,
21	* stateful and can fatal in an admin context, whereas the stored tree is just
22	* JSON — cheap, side-effect free and safe to touch during a bulk run.
23	*
24	* @package ThinkRank\SEO
25	* @since 1.23.0
26	*/
27
28	declare(strict_types=1);
29
30	namespace ThinkRank\SEO;
31
32	if (!defined('ABSPATH')) {
33	exit;
34	}
35
36	/**
37	* Resolves the analyzable content of a post, whatever built it.
38	*/
39	class Builder_Content {
40
41	/**
42	* Post meta keys that hold builder data, in priority order.
43	*
44	* Several generations of the same builder are listed on purpose: Oxygen 6
45	* is Breakdance under the hood (`_breakdance_data`), while earlier Oxygen
46	* releases used `_oxygen_data` or the shortcode-based
47	* `ct_builder_shortcodes`. A site can only have one of them.
48	*
49	* @var string[]
50	*/
51	private const BUILDER_META_KEYS = [
52	'_breakdance_data', // Oxygen 6+ / Breakdance
53	'_oxygen_data', // Oxygen (earlier releases)
54	'ct_builder_shortcodes', // Oxygen classic
55	'_elementor_data', // Elementor
56	// Beaver Builder. Published layout first: `_fl_builder_draft` holds
57	// unsaved changes and would score content the visitor cannot see.
58	// Both are arrays of stdClass nodes, which is why the walker below
59	// has to treat objects like arrays (#449).
60	'_fl_builder_data', // Beaver Builder (published)
61	'_fl_builder_draft', // Beaver Builder (unsaved changes)
62	];
63
64	/**
65	* Bricks' content-area meta key, used when Bricks itself isn't loaded.
66	*
67	* Bricks exposes `BRICKS_DB_PAGE_CONTENT` and renames the underlying key
68	* between generations (it gained the `_2` suffix in 1.7.3), so the
69	* constant is authoritative and this literal is only the fallback for the
70	* contexts where it is undefined — Bricks is a theme, so on an admin or
71	* CLI request against a site that has since switched themes the constant
72	* is simply not there while the post meta still is.
73	*
74	* Bricks stores three areas — header, content and footer. Only the content
75	* area belongs to the post being scored; the header and footer areas live
76	* on Bricks' own template posts and would double-count site chrome into
77	* every page's word count, so they are deliberately not read here.
78	*
79	* @since 2.2.1
80	* @var string
81	*/
82	private const BRICKS_CONTENT_META_KEY = '_bricks_page_content_2';
83
84	/**
85	* Bricks' per-post editor-mode meta key, used when Bricks isn't loaded.
86	*
87	* @since 2.2.1
88	* @var string
89	*/
90	private const BRICKS_EDITOR_MODE_META_KEY = '_bricks_editor_mode';
91
92	/**
93	* Bricks' components option, used when Bricks itself isn't loaded.
94	*
95	* @since 2.2.1
96	* @var string
97	*/
98	private const BRICKS_COMPONENTS_OPTION = 'bricks_components';
99
100	/**
101	* Bricks' element that renders the post's own `post_content`.
102	*
103	* A Bricks page normally discards `post_content` entirely, which is why
104	* anything left there is invisible. Dropping this element onto the canvas
105	* is the one way an author puts it back on the page, so its presence flips
106	* `post_content` from stale leftovers to content the visitor reads.
107	*
108	* @since 2.3.1
109	* @var string
110	*/
111	private const BRICKS_POST_CONTENT_ELEMENT = 'post-content';
112
113	/**
114	* Resolved Bricks trees for this request, keyed by post ID.
115	*
116	* Rendering one page asks for the tree about twenty times — every
117	* description, every schema node, the FAQ guard — and resolving it is not
118	* free. `bricks_content_source()` clears `Bricks\Database::$active_templates`
119	* before asking Bricks which content template applies, which defeats
120	* Bricks' own early-return and re-runs its whole template-condition engine;
121	* `expand_bricks_components()` then walks the tree again. Measured on a
122	* Bricks page with no content of its own, that was ten full runs of the
123	* rules engine per request.
124	*
125	* Per-request only, and only ever read back within one page render — a
126	* request that writes Bricks content does not also render it.
127	*
128	* @since 2.3.1
129	* @var array<int,array<int,mixed>>
130	*/
131	private static array $bricks_trees = [];
132
133	/**
134	* JSON keys whose values are user-visible text.
135	*
136	* Builder trees mix content with configuration, so a blind string sweep
137	* would count CSS classes and option slugs as words. Matching on the key
138	* keeps the word count honest.
139	*
140	* @var string[]
141	*/
142	private const CONTENT_KEYS = [
143	'text', 'title', 'subtitle', 'heading', 'subheading', 'content',
144	'description', 'caption', 'excerpt', 'label', 'value', 'html',
145	'editor', 'quote', 'answer', 'question', 'body', 'button_text',
146	];
147
148	/**
149	* JSON keys whose values hold a link destination.
150	*
151	* Builders store a link's destination in a structured field separate from
152	* its label, either as a bare URL string or as a `{ url: … }` object.
153	* Neither shape survives a text sweep — the key is not content and a bare
154	* URL contains no `<` — so no `<a>` tag reached the link counters.
155	*
156	* @var string[]
157	*/
158	private const URL_KEYS = [
159	'link', 'url', 'href', 'link_url', 'button_link', 'permalink', 'link_to',
160	];
161
162	/**
163	* JSON keys whose values hold an embedded video's source.
164	*
165	* A builder's video widget keeps its destination in a provider-specific
166	* field — Elementor picks `youtube_url`, `vimeo_url`, `dailymotion_url` or
167	* `hosted_url` according to the chosen source type — none of which is a
168	* link field or a content field, so a video on a builder page reached the
169	* analyzers as nothing at all.
170	*
171	* These are deliberately kept out of URL_KEYS. A video is an embed, not an
172	* outbound link: rendering one as `<a href>` would add a spurious external
173	* link to every page carrying a video and skew the link counts. They are
174	* reconstructed as `<iframe>`/`<video>` instead, which the video detector
175	* recognises and the link and image counters ignore.
176	*
177	* @since 2.3.1
178	* @var string[]
179	*/
180	private const VIDEO_KEYS = [
181	'youtube_url', 'vimeo_url', 'dailymotion_url', 'videopress_url',
182	'hosted_url', 'video_url', 'video_src', 'video_link',
183	];
184
185	/**
186	* File extensions that mean a video source is a file, not a provider page.
187	*
188	* @since 2.3.1
189	* @var string[]
190	*/
191	private const VIDEO_FILE_EXTENSIONS = ['mp4', 'webm', 'ogv', 'mov', 'm4v'];
192
193	/**
194	* Source keys to trust for a declared video source type.
195	*
196	* A widget keeps one field per provider and does not clear the others when
197	* the author switches source: an Elementor video moved from YouTube to Self
198	* Hosted still carries the earlier `youtube_url`. Reading whichever key
199	* turns up first then emits the video the author replaced. The widget says
200	* which one it is actually playing, so that is read first and the flat key
201	* sweep is only the fallback for a builder that declares nothing.
202	*
203	* @since 2.3.1
204	* @var array<string,string[]>
205	*/
206	private const VIDEO_KEYS_BY_TYPE = [
207	'youtube' => ['youtube_url'],
208	'vimeo' => ['vimeo_url'],
209	'dailymotion' => ['dailymotion_url'],
210	'videopress' => ['videopress_url'],
211	'hosted' => ['hosted_url', 'video_url', 'video_src', 'video_link'],
212	'media' => ['hosted_url', 'video_url', 'video_src', 'video_link'],
213	'file' => ['hosted_url', 'video_url', 'video_src', 'video_link'],
214	'self_hosted' => ['hosted_url', 'video_url', 'video_src', 'video_link'],
215	];
216
217	/**
218	* Keys a builder uses to name which video source a widget is playing.
219	*
220	* @since 2.3.1
221	* @var string[]
222	*/
223	private const VIDEO_TYPE_KEYS = ['video_type', 'videotype', 'video_source', 'source_type'];
224
225	/**
226	* JSON keys whose values hold an image, as a URL string or `{ url, alt }`.
227	*
228	* @var string[]
229	*/
230	private const IMAGE_KEYS = [
231	'image', 'src', 'image_url', 'background_image', 'bg_image', 'photo',
232	];
233
234	/**
235	* JSON keys that carry a heading level for the node's text.
236	*
237	* A builder heading's text is collected (its key is in CONTENT_KEYS) and so
238	* counts toward the word count, but it arrives as bare text with no `<h2>`
239	* wrapper — which is why heading-structure checks saw none.
240	*
241	* @var string[]
242	*/
243	private const HEADING_TAG_KEYS = [
244	// Lower-cased on both sides of the comparison, so `headingtag` is the
245	// camelCase `headingTag` Bricks uses throughout its own controls and
246	// which ThinkRank's Bricks elements declare. Without it their section
247	// headings counted as body copy and never reached heading structure.
248	'header_size', 'heading_tag', 'headingtag', 'html_tag', 'title_tag', 'tag', 'level', 'size',
249	];
250
251	/**
252	* Keys whose value is alternative text for a sibling image.
253	*
254	* @var string[]
255	*/
256	private const ALT_KEYS = ['alt', 'alt_text', 'image_alt', 'title'];
257
258	/**
259	* Resolve the content worth analyzing for a post.
260	*
261	* @param \WP_Post $post Post being analyzed.
262	* @return string HTML/text to analyze.
263	*/
264	public static function resolve(\WP_Post $post): string {
265	$raw = (string) $post->post_content;
266
267	// A page built in Gutenberg and then switched to Bricks keeps its old
268	// blocks in `post_content` forever — Bricks never clears them, and
269	// never renders them either. Resolving that first meant the stale draft
270	// beat the tree the visitor actually reads, and it did not stop at the
271	// score: the same string becomes the meta description, og:description,
272	// twitter:description and the schema description. Starting from nothing
273	// sends the resolution straight to Bricks' storage, which is where this
274	// page's words are (#651).
275	//
276	// Only for the stored path. `resolve_markup()` is also called with live
277	// editor content, and the Bricks panel's resolver reads the canvas —
278	// discarding that would replace what the author is typing with the last
279	// save.
280	if (self::bricks_supersedes_post_content((int) $post->ID)) {
281	$raw = '';
282	}
283
284	return self::resolve_markup($raw, $post);
285	}
286
287	/**
288	* Whether Bricks renders this post and throws its `post_content` away.
289	*
290	* True means anything still stored in `post_content` is invisible: it is
291	* not on the page, so it must not be scored, described or published as
292	* structured data. False covers both a post Bricks does not own and a
293	* Bricks page that puts `post_content` back with a Post Content element.
294	*
295	* @since 2.3.1
296	*
297	* @param int $post_id Post being resolved.
298	* @return bool
299	*/
300	public static function bricks_supersedes_post_content(int $post_id): bool {
301	$tree = self::bricks_tree($post_id);
302
303	if (empty($tree)) {
304	return false;
305	}
306
307	foreach ($tree as $element) {
308	if (is_array($element)
309	&& self::BRICKS_POST_CONTENT_ELEMENT === ($element['name'] ?? null)
310	) {
311	return false;
312	}
313	}
314
315	return !self::bricks_tree_prints_post_content($tree);
316	}
317
318	/**
319	* Whether a Bricks tree prints the body through a dynamic-data tag.
320	*
321	* The Post Content element is not the only way back onto the page: Bricks'
322	* `{post_content}` tag renders the same thing from inside an ordinary text
323	* element, and a single-post template written that way is a common shape.
324	* Missing it would mean the post's real body is discarded everywhere —
325	* scoring, the meta/og/twitter descriptions, the schema description — for a
326	* page that is displaying it.
327	*
328	* Matched over the encoded tree rather than per setting, because the tag can
329	* sit in any string field of any element and Bricks allows modifiers after
330	* the name (`{post_content:...}`).
331	*
332	* @since 2.3.1
333	*
334	* @param array $tree Bricks element tree.
335	* @return bool
336	*/
337	private static function bricks_tree_prints_post_content(array $tree): bool {
338	$encoded = wp_json_encode($tree);
339
340	return is_string($encoded) && false !== stripos($encoded, '{post_content');
341	}
342
343	/**
344	* The post's content as the visitor actually receives it.
345	*
346	* `post_content` for everything except a Bricks page that discards it, and
347	* there the Bricks tree's text. Descriptions are derived from a post's body
348	* in half a dozen places; every one of them wants this rather than the raw
349	* column (#651).
350	*
351	* @since 2.3.1
352	*
353	* @param \WP_Post $post Post being described.
354	* @return string
355	*/
356	public static function visible_content(\WP_Post $post): string {
357	$superseding = self::superseding_content($post);
358
359	return '' !== $superseding ? $superseding : (string) $post->post_content;
360	}
361
362	/**
363	* Replacement body text for a post whose `post_content` does not render.
364	*
365	* Empty for every ordinary post, which is what makes this safe to call from
366	* paths that already handle excerpts their own way: they keep that handling
367	* and only a Bricks page is diverted.
368	*
369	* @since 2.3.1
370	*
371	* @param \WP_Post $post Post being described.
372	* @return string Visible body text, or '' when `post_content` is fine.
373	*/
374	public static function superseding_content(\WP_Post $post): string {
375	if (!self::bricks_supersedes_post_content((int) $post->ID)) {
376	return '';
377	}
378
379	$bricks = self::from_bricks((int) $post->ID);
380
381	return self::is_blank($bricks) ? '' : $bricks;
382	}
383
384	/**
385	* Body text to derive a description from, when the usual source is wrong.
386	*
387	* A hand-written excerpt is the author's own summary and is correct however
388	* the page is built, so it yields '' here and the caller's normal
389	* `get_the_excerpt()` path keeps it. Only a Bricks page with no excerpt —
390	* where core would derive one from discarded `post_content` — gets diverted.
391	*
392	* @since 2.3.1
393	*
394	* @param \WP_Post $post Post being described.
395	* @return string Text to summarize, or '' to leave the caller's path alone.
396	*/
397	public static function superseding_excerpt_source(\WP_Post $post): string {
398	if ('' !== trim((string) $post->post_excerpt)) {
399	return '';
400	}
401
402	return self::superseding_content($post);
403	}
404
405	/**
406	* The Bricks element tree that renders for a post.
407	*
408	* Public because what Bricks puts on the page is not only a scoring
409	* question: the schema graph has to know whether a Bricks element already
410	* publishes the page's FAQ before adding one of its own (#649, #650).
411	*
412	* Flat, in Bricks' own storage shape — `expand_bricks_components()`
413	* appends component definitions to the same list rather than nesting them,
414	* so one `foreach` reaches every element.
415	*
416	* @since 2.3.1
417	*
418	* @param int $post_id Post being resolved.
419	* @return array<int,mixed> Elements, or [] when Bricks renders nothing here.
420	*/
421	public static function bricks_tree(int $post_id): array {
422	if (array_key_exists($post_id, self::$bricks_trees)) {
423	return self::$bricks_trees[$post_id];
424	}
425
426	self::$bricks_trees[$post_id] = self::resolve_bricks_tree($post_id);
427
428	return self::$bricks_trees[$post_id];
429	}
430
431	/**
432	* Discard the resolved-tree memo. Test seam.
433	*
434	* @since 2.3.1
435	* @return void
436	*/
437	public static function flush_bricks_cache(): void {
438	self::$bricks_trees = [];
439	}
440
441	/**
442	* Read and resolve a post's Bricks tree, ignoring the memo.
443	*
444	* @since 2.3.1
445	*
446	* @param int $post_id Post being resolved.
447	* @return array<int,mixed>
448	*/
449	private static function resolve_bricks_tree(int $post_id): array {
450	if (!self::bricks_owns_post($post_id)) {
451	return [];
452	}
453
454	$source = self::bricks_content_source($post_id);
455	if (!$source) {
456	return [];
457	}
458
459	$stored = get_post_meta($source, self::bricks_meta_key(), true);
460
461	if (is_string($stored)) {
462	$stored = '' === trim($stored) ? null : json_decode($stored, true);
463	}
464
465	if (!is_array($stored) \|\| empty($stored)) {
466	return [];
467	}
468
469	return self::expand_bricks_components($stored);
470	}
471
472	/**
473	* Resolve an arbitrary chunk of editor markup for the given post.
474	*
475	* The editor sends its live content to the scorer so an author sees their
476	* unsaved edits reflected. On a builder page that live string is the raw
477	* builder markup — the block editor hands over Divi's
478	* `<!-- wp:divi/... -->` comments verbatim, because it cannot render
479	* blocks it has no client-side registration for. Analyzed as-is it reads
480	* as zero words, which is how a Divi page could show a correct saved score
481	* while the live Content Analysis panel next to it still said
482	* "No content".
483	*
484	* Running the live string through the same chain as stored content keeps
485	* both paths honest, and falling through to the post's builder storage
486	* covers builders (Oxygen) whose editor content is empty to begin with.
487	*
488	* @since 1.23.0
489	*
490	* @param string $raw Markup to analyze.
491	* @param \WP_Post $post Post the markup belongs to.
492	* @return string Content to analyze.
493	*/
494	public static function resolve_markup(string $raw, \WP_Post $post): string {
495	$content = self::render_post_content($raw);
496
497	// Block markup that renders to nothing usually means the builder that
498	// owns those blocks did not register them in this context — Divi 5
499	// loads its module library lazily per-request, so in CLI, REST, admin
500	// and block-editor requests do_blocks() yields an empty string while
501	// the words sit right there in the block attributes. Read them
502	// directly.
503	if (self::is_blank($content)) {
504	$from_blocks = self::from_block_attributes($raw);
505	if (!self::is_blank($from_blocks)) {
506	$content = $from_blocks;
507	}
508	}
509
510	// Only reach for builder storage when the markup yielded nothing — a
511	// classic post must never pay for this.
512	if (self::is_blank($content)) {
513	$builder = self::from_builder_meta((int) $post->ID);
514	if (!self::is_blank($builder)) {
515	$content = $builder;
516	}
517	}
518
519	// A resolution that collapsed to nothing is worse than the raw markup.
520	if (self::is_blank($content) && !self::is_blank($raw)) {
521	$content = $raw;
522	}
523
524	/**
525	* Filter the content ThinkRank analyzes for a post.
526	*
527	* Use this to teach ThinkRank about a builder it does not know, or to
528	* override extraction for one it does.
529	*
530	* @since 1.23.0
531	*
532	* @param string $content Resolved content.
533	* @param \WP_Post $post Post being analyzed.
534	* @param string $raw Markup this resolution started from.
535	*/
536	return (string) apply_filters('thinkrank_analyzable_content', $content, $post, $raw);
537	}
538
539	/**
540	* Render blocks and shortcodes found in post_content.
541	*
542	* Best-effort: a third-party block that fatals must not take the whole
543	* score down with it.
544	*
545	* @param string $raw Raw post content.
546	* @return string Rendered content.
547	*/
548	private static function render_post_content(string $raw): string {
549	if ('' === trim($raw)) {
550	return '';
551	}
552
553	$content = $raw;
554
555	try {
556	if (function_exists('has_blocks') && function_exists('do_blocks') && has_blocks($raw)) {
557	$content = do_blocks($raw);
558	}
559
560	// Block output can itself contain shortcodes, so this runs either way.
561	if (function_exists('do_shortcode') && strpos($content, '[') !== false) {
562	$content = do_shortcode($content);
563	}
564	} catch (\Throwable $e) {
565	return $raw;
566	}
567
568	return self::is_blank($content) ? $raw : $content;
569	}
570
571	/**
572	* Extract text from the attributes of parsed blocks.
573	*
574	* @param string $raw Raw post content containing block markup.
575	* @return string Collected text, or '' when nothing was found.
576	*/
577	private static function from_block_attributes(string $raw): string {
578	if (!function_exists('parse_blocks') \|\| !function_exists('has_blocks') \|\| !has_blocks($raw)) {
579	return '';
580	}
581
582	try {
583	$blocks = parse_blocks($raw);
584	} catch (\Throwable $e) {
585	return '';
586	}
587
588	$attrs = [];
589	$collect = static function (array $items) use (&$collect, &$attrs): void {
590	foreach ($items as $block) {
591	if (!empty($block['attrs']) && is_array($block['attrs'])) {
592	$attrs[] = $block['attrs'];
593	}
594	if (!empty($block['innerBlocks']) && is_array($block['innerBlocks'])) {
595	$collect($block['innerBlocks']);
596	}
597	}
598	};
599	$collect($blocks);
600
601	return empty($attrs) ? '' : self::text_from_tree($attrs);
602	}
603
604	/**
605	* Everything Bricks contributes to this post's analyzable content.
606	*
607	* Bricks is the only builder here that needs more than a meta key, on
608	* three counts:
609	*
610	* - It leaves its stored tree behind when a post is switched back to the
611	* block editor, so an editor-mode gate has to run first or ThinkRank
612	* scores markup the visitor never sees — the same failure
613	* `_fl_builder_draft` was ordered against in #449.
614	* - A post's content can live on ANOTHER post. Bricks' Templates feature
615	* assigns a content template by condition, and a page using one stores
616	* nothing of its own; reading only the page's meta scores it blank
617	* while the visitor reads a full page.
618	* - Its stored text carries dynamic-data tags and internal element names
619	* that never reach the rendered page.
620	*
621	* @since 2.2.1
622	*
623	* @param int $post_id Post being resolved.
624	* @return string Extracted text, or '' when Bricks has nothing for it.
625	*/
626	private static function from_bricks(int $post_id): string {
627	$tree = self::bricks_tree($post_id);
628
629	if (empty($tree)) {
630	return '';
631	}
632
633	return self::strip_bricks_dynamic_tags(
634	self::text_from_tree(self::without_bricks_element_labels($tree))
635	);
636	}
637
638	/**
639	* Whether Bricks — not the block editor — renders this post.
640	*
641	* Bricks writes `bricks` or `wordpress` into its editor-mode meta as the
642	* author toggles between the two, and never clears the content it stored
643	* for the other mode. Only the `wordpress` value is disqualifying: an
644	* absent value is the normal state for a post Bricks built and never
645	* toggled. This follows Bricks' own `Helpers::render_with_bricks()`, which
646	* bails on exactly that one value.
647	*
648	* It deliberately does not match it exactly: the comparison here is
649	* case-insensitive, where Bricks' is strict. Bricks 2.3.12 only ever writes
650	* the value lowercase, so the two agree on everything Bricks itself
651	* stores; they part company only on a value some other integration wrote.
652	* The two shipping today disagree about the casing — SureRank compares
653	* against `'WordPress'`, AIOSEO against `'bricks'` — and of the two ways to
654	* be wrong about `'WordPress'`, blocking costs a score on a page that has
655	* one, while allowing scores stale content the visitor never sees, which is
656	* the failure this gate exists to prevent.
657	*
658	* @since 2.2.1
659	*
660	* @param int $post_id Post being resolved.
661	* @return bool
662	*/
663	private static function bricks_owns_post(int $post_id): bool {
664	$mode = get_post_meta($post_id, self::bricks_editor_mode_key(), true);
665
666	// phpcs:ignore WordPress.WP.CapitalPDangit.MisspelledInText -- Bricks' own stored meta value, lower-cased for the comparison.
667	return !(is_string($mode) && 'wordpress' === strtolower(trim($mode)));
668	}
669
670	/**
671	* The post whose Bricks tree actually renders for this post.
672	*
673	* Usually the post itself. When it stores nothing of its own, Bricks falls
674	* back to whichever content template's conditions match, and that template
675	* is a separate post carrying the words the visitor reads.
676	*
677	* Resolution is delegated to Bricks rather than reimplemented: template
678	* conditions are a whole rules engine (post IDs, types, taxonomies,
679	* archives), and a second implementation would drift from it. Bricks
680	* answers through statics, so they are saved and restored around the call —
681	* `set_active_templates()` returns early once populated, and on a
682	* front-end request Bricks has already populated it for the page being
683	* served. Clobbering that would corrupt the render in progress.
684	*
685	* Best-effort by design: any failure returns the post's own data, which is
686	* exactly today's behaviour.
687	*
688	* @since 2.2.1
689	*
690	* @param int $post_id Post being resolved.
691	* @return int Post ID holding the Bricks tree, or 0 when there is none.
692	*/
693	private static function bricks_content_source(int $post_id): int {
694	$own = get_post_meta($post_id, self::bricks_meta_key(), true);
695	if ((is_array($own) && !empty($own)) \|\| (is_string($own) && '' !== trim($own))) {
696	return $post_id;
697	}
698
699	if (!class_exists('\\Bricks\\Database')
700	\|\| !method_exists('\\Bricks\\Database', 'set_active_templates')
701	) {
702	return 0;
703	}
704
705	// `set_active_templates()` writes TWO statics — `$active_templates` and,
706	// when a header template resolves, `$header_position`. Both are saved,
707	// and both are restored in `finally` rather than on the happy path: a
708	// throw part-way through (a third-party hook on
709	// `bricks/database/content_type`, `bricks/builder/data_post_id` or
710	// `bricks/active_templates` is enough) must not leave Bricks' render
711	// state holding this lookup's values. Restoring only after a clean
712	// return is what the `catch` below would otherwise skip.
713	$has_header_position = property_exists('\\Bricks\\Database', 'header_position');
714	$saved_templates = \Bricks\Database::$active_templates;
715	$saved_header_position = $has_header_position ? \Bricks\Database::$header_position : null;
716
717	try {
718	\Bricks\Database::$active_templates = [];
719	\Bricks\Database::set_active_templates($post_id);
720	$template = (int) (\Bricks\Database::$active_templates['content'] ?? 0);
721	} catch (\Throwable $e) {
722	return 0;
723	} finally {
724	\Bricks\Database::$active_templates = $saved_templates;
725	if ($has_header_position) {
726	\Bricks\Database::$header_position = $saved_header_position;
727	}
728	}
729
730	// A template that is the post itself adds nothing over the empty read
731	// above, and would otherwise recurse conceptually.
732	return $template === $post_id ? 0 : $template;
733	}
734
735	/**
736	* Splice component definitions into the tree.
737	*
738	* A Bricks component keeps its markup in the `bricks_components` option,
739	* not on the page. The page stores only an instance: an element carrying
740	* `cid` and, usually, empty `settings`. Walking the page alone therefore
741	* found no words at all, and a page built entirely from components scored
742	* blank — the same failure as a page built from a content template.
743	*
744	* Confirmed on Bricks 2.3.12: `Bricks\Frontend::render_data()` renders the
745	* component's copy from an instance this walker extracted '' from.
746	*
747	* The definition is read straight from the option rather than through
748	* `Bricks\Helpers::get_component_instance()`. That helper resolves an
749	* instance's property overrides, which would be better, but it reads
750	* `Bricks\Database::$global_data['components']` — populated once per
751	* request, and empty in the admin and CLI contexts where bulk scoring
752	* runs. Refreshing it would mean writing to Bricks' live render state, the
753	* same hazard the template resolver is careful to avoid, and gating on it
754	* would make a page score differently in wp-admin than on the front end.
755	* Reading the stored definition is consistent everywhere.
756	*
757	* The trade-off: an instance that overrides a component property is scored
758	* with the component's authored copy rather than the override. That is the
759	* text the component renders by default, and it is much closer than the
760	* nothing this returned before.
761	*
762	* @since 2.2.1
763	*
764	* @param array $tree Bricks content area.
765	* @return array Tree with component elements spliced in after each instance.
766	*/
767	private static function expand_bricks_components(array $tree): array {
768	$expanded = [];
769	$open = [];
770
771	$walk = static function (array $elements, int $depth) use (&$walk, &$expanded, &$open): void {
772	foreach ($elements as $element) {
773	$expanded[] = $element;
774
775	if (!is_array($element) \|\| empty($element['cid']) \|\| !is_string($element['cid'])) {
776	continue;
777	}
778
779	$cid = $element['cid'];
780
781	// A component nested inside its own definition would recurse
782	// forever; the depth cap covers deep but legitimate nesting.
783	if (isset($open[$cid]) \|\| $depth > 4) {
784	continue;
785	}
786
787	$children = self::bricks_component_elements($cid);
788	if (empty($children)) {
789	continue;
790	}
791
792	// Re-entrant per branch, not per page: the guard is released
793	// after the walk so a second instance further along the page
794	// still expands, rather than being mistaken for recursion.
795	//
796	// That does NOT double the word count — `text_from_tree()`
797	// ends in `array_unique()`, which collapses a repeated
798	// component's copy the same way it collapses a value repeated
799	// across responsive breakpoints. Expanding both instances is
800	// about not silently dropping the second one's structure.
801	$open[$cid] = true;
802	$walk($children, $depth + 1);
803	unset($open[$cid]);
804	}
805	};
806
807	$walk($tree, 0);
808
809	return $expanded;
810	}
811
812	/**
813	* The stored elements of one Bricks component.
814	*
815	* @since 2.2.1
816	*
817	* @param string $cid Component id held by an instance element.
818	* @return array Component elements, or [] when it cannot be resolved.
819	*/
820	private static function bricks_component_elements(string $cid): array {
821	$components = get_option(self::bricks_constant('BRICKS_DB_COMPONENTS', self::BRICKS_COMPONENTS_OPTION), []);
822
823	if (!is_array($components)) {
824	return [];
825	}
826
827	foreach ($components as $component) {
828	$component = self::as_children($component);
829	if (null === $component) {
830	continue;
831	}
832
833	if (isset($component['id']) && $component['id'] === $cid && !empty($component['elements'])) {
834	return is_array($component['elements']) ? $component['elements'] : [];
835	}
836	}
837
838	return [];
839	}
840
841	/**
842	* Drop each Bricks element's internal name before the tree is walked.
843	*
844	* A Bricks element carries an optional top-level `label` — the nickname an
845	* author types in the Structure panel to find it again ("Hero headline",
846	* "CTA row"). It is builder chrome and is never rendered, but `label` is in
847	* CONTENT_KEYS because it is real content for other builders' form fields,
848	* so it was being counted as page copy.
849	*
850	* Only the element's own `label` is removed. A `label` inside `settings`
851	* is a rendered field label and stays.
852	*
853	* @since 2.2.1
854	*
855	* @param array $tree Bricks content area.
856	* @return array Tree with element nicknames removed.
857	*/
858	private static function without_bricks_element_labels(array $tree): array {
859	foreach ($tree as $index => $element) {
860	if (is_array($element) && isset($element['id'], $element['label'])) {
861	unset($tree[$index]['label']);
862	}
863	}
864
865	return $tree;
866	}
867
868	/**
869	* Remove Bricks dynamic-data tags from extracted text.
870	*
871	* Bricks stores `{post_title}`, `{post_meta:price}`, `{echo:my_fn}` and the
872	* like verbatim and resolves them when it renders. Extraction reads the
873	* stored tree, so without this the placeholders were counted as words, and
874	* a heading whose text is `{post_title}` reported the literal token as its
875	* heading text.
876	*
877	* The pattern is deliberately narrower than Bricks' own
878	* (`/{([\wÀ-ÖØ-öø-ÿ\-\s\.\/:...]+)}/u`), which also matches braces
879	* containing spaces. Bricks only substitutes tags that resolve to a
880	* registered provider and leaves anything else on the page as literal text,
881	* so the broad pattern would delete prose the visitor can actually read.
882	* Matching only tag-shaped tokens keeps every real sentence and still
883	* removes every placeholder — the same trade-off SureRank makes.
884	*
885	* @since 2.2.1
886	*
887	* @param string $text Extracted text.
888	* @return string Text with placeholders removed.
889	*/
890	private static function strip_bricks_dynamic_tags(string $text): string {
891	$stripped = preg_replace('/\{[a-z0-9_][a-z0-9_:\-\.]*\}/i', '', $text);
892
893	if (null === $stripped) {
894	return $text;
895	}
896
897	// Collapse the runs of spaces a removed tag leaves mid-sentence,
898	// without touching the newlines that separate collected nodes.
899	$tidied = preg_replace('/[ \t]{2,}/', ' ', $stripped);
900
901	return null === $tidied ? $stripped : $tidied;
902	}
903
904	/**
905	* Bricks' content-area meta key, preferring Bricks' own constant.
906	*
907	* @since 2.2.1
908	*
909	* @return string
910	*/
911	private static function bricks_meta_key(): string {
912	return self::bricks_constant('BRICKS_DB_PAGE_CONTENT', self::BRICKS_CONTENT_META_KEY);
913	}
914
915	/**
916	* Bricks' editor-mode meta key, preferring Bricks' own constant.
917	*
918	* @since 2.2.1
919	*
920	* @return string
921	*/
922	private static function bricks_editor_mode_key(): string {
923	return self::bricks_constant('BRICKS_DB_EDITOR_MODE', self::BRICKS_EDITOR_MODE_META_KEY);
924	}
925
926	/**
927	* Read one of Bricks' key-name constants, falling back to the literal.
928	*
929	* @since 2.2.1
930	*
931	* @param string $name Constant name.
932	* @param string $fallback Key to use when the constant is unavailable.
933	* @return string
934	*/
935	private static function bricks_constant(string $name, string $fallback): string {
936	if (defined($name)) {
937	$value = constant($name);
938	if (is_string($value) && '' !== trim($value)) {
939	return $value;
940	}
941	}
942
943	return $fallback;
944	}
945
946	/**
947	* Pull text out of whichever builder stored this post.
948	*
949	* @param int $post_id Post ID.
950	* @return string Extracted text, or '' when no builder data was found.
951	*/
952	private static function from_builder_meta(int $post_id): string {
953	// Bricks first: it is the only builder whose content can live on
954	// another post, and the only one gated on an editor mode.
955	$bricks = self::from_bricks($post_id);
956	if (!self::is_blank($bricks)) {
957	return $bricks;
958	}
959
960	foreach (self::BUILDER_META_KEYS as $key) {
961	$stored = get_post_meta($post_id, $key, true);
962
963	if (is_string($stored) && '' !== trim($stored)) {
964	$decoded = json_decode($stored, true);
965
966	// JSON node tree (Breakdance/Oxygen 6, Elementor).
967	if (is_array($decoded)) {
968	$text = self::text_from_tree($decoded);
969	if (!self::is_blank($text)) {
970	return $text;
971	}
972	continue;
973	}
974
975	// Shortcode tree (Oxygen classic).
976	if (strpos($stored, '[') !== false && function_exists('do_shortcode')) {
977	try {
978	$rendered = do_shortcode($stored);
979	} catch (\Throwable $e) {
980	$rendered = $stored;
981	}
982	if (!self::is_blank($rendered)) {
983	return $rendered;
984	}
985	}
986
987	continue;
988	}
989
990	// Some builders store an already-decoded tree — an array for most,
991	// an array of objects for Beaver Builder (#449).
992	$tree = self::as_children($stored);
993	if (null !== $tree) {
994	$text = self::text_from_tree($tree);
995	if (!self::is_blank($text)) {
996	return $text;
997	}
998	}
999	}
1000
1001	return '';
1002	}
1003
1004	/**
1005	* A node's children, whether it stores them as an array or an object.
1006	*
1007	* The walker used to return immediately on `!is_array($node)`, so an
1008	* object node was dropped along with its entire subtree — silently, as
1009	* `''`, which the caller reads as "this builder stored nothing" rather
1010	* than "this walker cannot read this shape".
1011	*
1012	* Beaver Builder stores `_fl_builder_data` as an array of stdClass nodes,
1013	* each with a stdClass `settings` object, so every node would have been
1014	* dropped and adding its meta key alone would have looked like it worked
1015	* and changed nothing. Not BB-specific: any builder storing objects hits
1016	* this, and that shape will come up again (#449).
1017	*
1018	* @since 2.1.0
1019	*
1020	* @param mixed $node Candidate node.
1021	* @return array<string\|int,mixed>\|null Traversable children, or null.
1022	*/
1023	private static function as_children($node): ?array {
1024	if (is_array($node)) {
1025	return $node;
1026	}
1027
1028	// Deliberately not is_object(): a builder can store a value object
1029	// (DateTime, a WP_Post) whose properties are not content, and
1030	// get_object_vars() on those yields noise. stdClass is what the
1031	// JSON/serialize round-trip produces, which is the shape we want.
1032	if ($node instanceof \stdClass) {
1033	return get_object_vars($node);
1034	}
1035
1036	return null;
1037	}
1038
1039	/**
1040	* Walk a builder node tree and collect the user-visible text.
1041	*
1042	* Values are joined with block-level markup so downstream heading, link and
1043	* image detection keeps working on the result.
1044	*
1045	* @param array $tree Decoded builder tree.
1046	* @return string Collected HTML.
1047	*/
1048	private static function text_from_tree(array $tree): string {
1049	$collected = [];
1050
1051	// Strings already represented inside reconstructed markup, so the plain
1052	// sweep below doesn't emit a link label or heading a second time and
1053	// double it in the word count.
1054	$consumed = [];
1055
1056	// Pass 1 — rebuild <a>, <img> and <hN> from node shape. This has to
1057	// happen per node rather than per leaf: a link's label and its
1058	// destination are separate sibling fields, so once the tree is
1059	// flattened to leaves the pairing is gone.
1060	$reconstruct = static function ($node) use (&$reconstruct, &$collected, &$consumed): void {
1061	$node = self::as_children($node);
1062	if (null === $node) {
1063	return;
1064	}
1065
1066	$markup = self::markup_for_node($node, $consumed);
1067	if ('' !== $markup) {
1068	$collected[] = $markup;
1069	}
1070
1071	foreach ($node as $child_key => $child) {
1072	// A `link` / `image` sub-object is a destination descriptor the
1073	// parent has already folded into its markup. Descending into it
1074	// would emit the same URL a second time as a bare link, and
1075	// would turn an image's own `url` field into a spurious <a>.
1076	if (is_string($child_key)
1077	&& (in_array(strtolower($child_key), self::URL_KEYS, true)
1078	\|\| in_array(strtolower($child_key), self::IMAGE_KEYS, true)
1079	\|\| in_array(strtolower($child_key), self::VIDEO_KEYS, true))
1080	) {
1081	continue;
1082	}
1083
1084	$reconstruct($child);
1085	}
1086	};
1087	$reconstruct($tree);
1088
1089	// Pass 2 — remaining visible text.
1090	$walk = static function ($node, $key = null) use (&$walk, &$collected, &$consumed): void {
1091	$children = self::as_children($node);
1092	if (null !== $children) {
1093	foreach ($children as $child_key => $child) {
1094	$walk($child, is_string($child_key) ? $child_key : $key);
1095	}
1096	return;
1097	}
1098
1099	if (!is_string($node) \|\| '' === trim($node)) {
1100	return;
1101	}
1102
1103	// Already inside a reconstructed tag.
1104	if (in_array($node, $consumed, true)) {
1105	return;
1106	}
1107
1108	$is_content_key = is_string($key)
1109	&& in_array(strtolower($key), self::CONTENT_KEYS, true);
1110
1111	// Markup is content wherever it appears; bare strings only count
1112	// when their key says they are content, so slugs and class names
1113	// stay out of the word count.
1114	if ($is_content_key \|\| strpos($node, '<') !== false) {
1115	$collected[] = $node;
1116	}
1117	};
1118
1119	$walk($tree);
1120
1121	if (empty($collected)) {
1122	return '';
1123	}
1124
1125	// De-duplicate: builder trees often repeat a value across responsive
1126	// breakpoints, which would otherwise multiply the word count.
1127	$collected = array_unique($collected);
1128
1129	return implode("\n", $collected);
1130	}
1131
1132	/**
1133	* The video source a node is actually playing, if any.
1134	*
1135	* @since 2.3.1
1136	*
1137	* @param array $node Builder node.
1138	* @return string Video source, or '' when the node carries none.
1139	*/
1140	private static function video_from(array $node): string {
1141	foreach ($node as $key => $value) {
1142	if (!is_string($key) \|\| !is_string($value)) {
1143	continue;
1144	}
1145
1146	if (!in_array(strtolower($key), self::VIDEO_TYPE_KEYS, true)) {
1147	continue;
1148	}
1149
1150	$keys = self::VIDEO_KEYS_BY_TYPE[strtolower(trim($value))] ?? null;
1151	if (null === $keys) {
1152	continue;
1153	}
1154
1155	// A recognised video_type settles it, including when that
1156	// provider's own field is empty. Falling through to the flat sweep
1157	// there handed back whichever sibling key happened to come first in
1158	// node order — the stale youtube_url left behind after switching
1159	// the widget to a hosted file, which is exactly what keying on the
1160	// declared type is meant to prevent.
1161	$declared = self::url_from($node, $keys);
1162
1163	return self::is_video_source($declared) ? $declared : '';
1164	}
1165
1166	$url = self::url_from($node, self::VIDEO_KEYS);
1167
1168	return self::is_video_source($url) ? $url : '';
1169	}
1170
1171	/**
1172	* Whether a value can be a video source.
1173	*
1174	* `looks_like_url()` also accepts `#anchor`, `mailto:` and `tel:`, which a
1175	* link node may legitimately hold but a video cannot: `<iframe src="#top">`
1176	* is not a video and would reach a video sitemap as one.
1177	*
1178	* @since 2.3.1
1179	*
1180	* @param string $url Candidate source.
1181	* @return bool
1182	*/
1183	private static function is_video_source(string $url): bool {
1184	return '' !== $url
1185	&& (1 === preg_match('#^(https?:)?//#i', $url) \|\| str_starts_with($url, '/'));
1186	}
1187
1188	/**
1189	* Whether a video source points at a file rather than a provider page.
1190	*
1191	* @since 2.3.1
1192	*
1193	* @param string $url Video source.
1194	* @return bool
1195	*/
1196	private static function is_video_file(string $url): bool {
1197	$path = (string) wp_parse_url($url, PHP_URL_PATH);
1198	$ext = strtolower((string) pathinfo($path, PATHINFO_EXTENSION));
1199
1200	return in_array($ext, self::VIDEO_FILE_EXTENSIONS, true);
1201	}
1202
1203	/**
1204	* Rebuild the HTML a single builder node represents, if any.
1205	*
1206	* Looks only at the node's own fields (plus one level of nesting, because
1207	* builders commonly wrap a destination as `{ url: … }`). Returns an empty
1208	* string for the vast majority of nodes, which are layout or configuration.
1209	*
1210	* Any leaf string folded into the returned markup is appended to $consumed
1211	* so the plain-text sweep doesn't count it twice.
1212	*
1213	* @param array $node Builder node.
1214	* @param array $consumed Collects strings represented in the returned markup.
1215	* @return string Reconstructed HTML, or '' when the node carries none.
1216	*/
1217	private static function markup_for_node(array $node, array &$consumed): string {
1218	$text = self::first_value($node, self::CONTENT_KEYS);
1219	$url = self::url_from($node, self::URL_KEYS);
1220	$image = self::image_from($node);
1221	$video = self::video_from($node);
1222	$tag = self::heading_tag_from($node);
1223
1224	$parts = [];
1225
1226	// Video: an embed shape rather than a link, so the video detector can
1227	// see it while the link counters do not mistake it for an outbound
1228	// link. A file source becomes <video src>, anything else an <iframe>,
1229	// matching how the builder itself renders the two cases.
1230	if ('' !== $video) {
1231	$parts[] = self::is_video_file($video)
1232	? sprintf('<video src="%s"></video>', esc_url_raw($video))
1233	: sprintf('<iframe src="%s"></iframe>', esc_url_raw($video));
1234	}
1235
1236	// Image: alt text matters as much as the tag, since alt checks run over
1237	// whatever this returns.
1238	if ('' !== $image['url']) {
1239	$alt = '' !== $image['alt'] ? $image['alt'] : (string) self::first_value($node, self::ALT_KEYS);
1240	if ('' !== $alt) {
1241	$consumed[] = $alt;
1242	}
1243	$parts[] = sprintf(
1244	'<img src="%s" alt="%s" />',
1245	esc_url_raw($image['url']),
1246	htmlspecialchars($alt, ENT_QUOTES)
1247	);
1248	}
1249
1250	if ('' !== $text) {
1251	$inner = $text;
1252
1253	if ('' !== $url) {
1254	$consumed[] = $text;
1255	$inner = sprintf('<a href="%s">%s</a>', esc_url_raw($url), $text);
1256	}
1257
1258	if ('' !== $tag) {
1259	$consumed[] = $text;
1260	$parts[] = sprintf('<%1$s>%2$s</%1$s>', $tag, $inner);
1261	} elseif ('' !== $url) {
1262	$parts[] = $inner;
1263	}
1264	} elseif ('' !== $url) {
1265	// A destination with no label still counts as a link for link
1266	// checks; the URL doubles as its anchor text.
1267	$parts[] = sprintf('<a href="%1$s">%1$s</a>', esc_url_raw($url));
1268	}
1269
1270	return implode("\n", $parts);
1271	}
1272
1273	/**
1274	* First non-empty scalar value under any of the given keys.
1275	*
1276	* @param array $node Builder node.
1277	* @param string[] $keys Candidate keys.
1278	* @return string Trimmed value, or '' when none match.
1279	*/
1280	private static function first_value(array $node, array $keys): string {
1281	foreach ($node as $key => $value) {
1282	if (!is_string($key) \|\| !is_string($value)) {
1283	continue;
1284	}
1285	if (in_array(strtolower($key), $keys, true) && '' !== trim($value)) {
1286	return trim($value);
1287	}
1288	}
1289
1290	return '';
1291	}
1292
1293	/**
1294	* Link destination held by a node, as a bare string or a `{ url: … }` object.
1295	*
1296	* @param array $node Builder node.
1297	* @param string[] $keys Candidate keys.
1298	* @return string URL, or '' when the node holds none.
1299	*/
1300	private static function url_from(array $node, array $keys): string {
1301	foreach ($node as $key => $value) {
1302	if (!is_string($key) \|\| !in_array(strtolower($key), $keys, true)) {
1303	continue;
1304	}
1305
1306	if (is_string($value) && self::looks_like_url($value)) {
1307	return trim($value);
1308	}
1309
1310	// Elementor and Breakdance both nest the destination one level down.
1311	$nested_values = self::as_children($value);
1312	if (null !== $nested_values) {
1313	foreach ($nested_values as $nested_key => $nested) {
1314	if (is_string($nested_key)
1315	&& in_array(strtolower($nested_key), ['url', 'href', 'permalink'], true)
1316	&& is_string($nested)
1317	&& self::looks_like_url($nested)
1318	) {
1319	return trim($nested);
1320	}
1321	}
1322	}
1323	}
1324
1325	return '';
1326	}
1327
1328	/**
1329	* Image URL and alt text held by a node.
1330	*
1331	* @param array $node Builder node.
1332	* @return array{url:string,alt:string}
1333	*/
1334	private static function image_from(array $node): array {
1335	foreach ($node as $key => $value) {
1336	if (!is_string($key) \|\| !in_array(strtolower($key), self::IMAGE_KEYS, true)) {
1337	continue;
1338	}
1339
1340	if (is_string($value) && self::looks_like_url($value)) {
1341	return ['url' => trim($value), 'alt' => ''];
1342	}
1343
1344	$nested_values = self::as_children($value);
1345	if (null !== $nested_values) {
1346	$url = '';
1347	$alt = '';
1348	foreach ($nested_values as $nested_key => $nested) {
1349	if (!is_string($nested_key) \|\| !is_string($nested)) {
1350	continue;
1351	}
1352	$nested_key = strtolower($nested_key);
1353	if ('' === $url && in_array($nested_key, ['url', 'src'], true) && self::looks_like_url($nested)) {
1354	$url = trim($nested);
1355	}
1356	if ('' === $alt && in_array($nested_key, self::ALT_KEYS, true)) {
1357	$alt = trim($nested);
1358	}
1359	}
1360	if ('' !== $url) {
1361	return ['url' => $url, 'alt' => $alt];
1362	}
1363	}
1364	}
1365
1366	return ['url' => '', 'alt' => ''];
1367	}
1368
1369	/**
1370	* Heading tag a node asks for, normalised to h1–h6.
1371	*
1372	* Accepts both the `h2` form and a bare level like `2`.
1373	*
1374	* @param array $node Builder node.
1375	* @return string Tag name, or '' when the node is not a heading.
1376	*/
1377	private static function heading_tag_from(array $node): string {
1378	foreach ($node as $key => $value) {
1379	if (!is_string($key) \|\| !in_array(strtolower($key), self::HEADING_TAG_KEYS, true)) {
1380	continue;
1381	}
1382
1383	if (is_string($value) && preg_match('/^h([1-6])$/i', trim($value), $m)) {
1384	return 'h' . $m[1];
1385	}
1386
1387	// A bare level only counts under a key that unambiguously means one;
1388	// `size` and `tag` carry values like "large" or "div" far more often.
1389	if (is_numeric($value)
1390	&& in_array(strtolower($key), ['level'], true)
1391	&& (int) $value >= 1 && (int) $value <= 6
1392	) {
1393	return 'h' . (int) $value;
1394	}
1395	}
1396
1397	return '';
1398	}
1399
1400	/**
1401	* Whether a string is plausibly a link or asset destination.
1402	*
1403	* Deliberately permissive about relative paths — builders store internal
1404	* links that way — but rejects the option slugs and CSS values that make up
1405	* most of a builder tree.
1406	*
1407	* @param string $value Candidate.
1408	* @return bool
1409	*/
1410	private static function looks_like_url(string $value): bool {
1411	$value = trim($value);
1412
1413	if ('' === $value \|\| strlen($value) > 2048) {
1414	return false;
1415	}
1416
1417	if (preg_match('#^(https?:)?//#i', $value) \|\| str_starts_with($value, '/')) {
1418	return true;
1419	}
1420
1421	// Protocol-ish destinations a link node can legitimately hold.
1422	return (bool) preg_match('#^(mailto:\|tel:\|\#)#i', $value);
1423	}
1424
1425	/**
1426	* Whether a value carries nothing worth analyzing.
1427	*
1428	* Readable text is the usual signal, but not the only one: a page can be
1429	* made entirely of media. A builder section holding just a gallery
1430	* reconstructs to `<img>` tags and one holding just a video widget to a
1431	* single `<iframe>` — both strip to an empty string, so a text-only test
1432	* discarded them here and the page fell through to the next builder key,
1433	* then to the raw markup, and finally reported as having no content at all.
1434	*
1435	* Comments are dropped before the tag test: the raw markup this class falls
1436	* back to on a builder page is unrendered block comments, which must stay
1437	* blank rather than be mistaken for reconstructed media.
1438	*
1439	* @param string $value Candidate content.
1440	* @return bool
1441	*/
1442	private static function is_blank(string $value): bool {
1443	if ('' !== trim(wp_strip_all_tags($value))) {
1444	return false;
1445	}
1446
1447	$without_comments = (string) preg_replace('~<!--.*?-->~s', '', $value);
1448
1449	return 1 !== preg_match('~<(?:a\|img\|iframe\|video\|source)\b~i', $without_comments);
1450	}
1451	}
1452