thinkrank / includes / ai / class-claude-client.php

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

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1	<?php
2	/**
3	* Claude API Client
4	*
5	* Handles communication with Anthropic Claude API
6	*
7	* @package ThinkRank\AI
8	* @since 1.0.0
9	*/
10
11	declare(strict_types=1);
12
13	namespace ThinkRank\AI;
14
15	use ThinkRank\AI\Traits\Request_Timeout;
16
17	// Prevent direct access
18	if (!defined('ABSPATH')) {
19	exit;
20	}
21
22	require_once __DIR__ . '/traits/trait-request-timeout.php';
23
24	/**
25	* Claude Client Class
26	*
27	* Single Responsibility: Handle Claude API communication
28	*
29	* @since 1.0.0
30	*/
31	class Claude_Client {
32
33	use Request_Timeout;
34
35
36	/**
37	* Claude API base URL
38	*/
39	private const API_BASE_URL = 'https://api.anthropic.com/v1';
40
41	/**
42	* API key
43	*
44	* @var string
45	*/
46	private string $api_key;
47
48	/**
49	* Default model
50	*
51	* @var string
52	*/
53	private string $model;
54
55	/**
56	* Request timeout in seconds
57	*
58	* @var int
59	*/
60	private int $timeout;
61
62	/**
63	* Prompt Builder instance
64	*
65	* @since 1.0.0
66	* @var Prompt_Builder\|null
67	*/
68	private ?Prompt_Builder $prompt_builder = null;
69
70	/**
71	* Constructor
72	*
73	* @param string $api_key Claude API key
74	* @param string $model Default model to use
75	* @param int $timeout Request timeout
76	*/
77	public function __construct(string $api_key, string $model = \ThinkRank\Core\Settings::DEFAULT_CLAUDE_MODEL, int $timeout = 30) {
78	$this->api_key = $api_key;
79	$this->model = self::normalize_model($model);
80	$this->timeout = $timeout;
81	}
82
83	/**
84	* Get Prompt Builder instance
85	*
86	* @since 1.0.0
87	*
88	* @return Prompt_Builder Prompt Builder instance
89	*/
90	private function get_prompt_builder(): Prompt_Builder {
91	if (!$this->prompt_builder) {
92	// Ensure Prompt Builder is loaded
93	if (!class_exists('ThinkRank\\AI\\Prompt_Builder')) {
94	require_once THINKRANK_PLUGIN_DIR . 'includes/ai/class-prompt-builder.php';
95	}
96	$this->prompt_builder = new Prompt_Builder();
97	}
98	return $this->prompt_builder;
99	}
100
101	/**
102	* Generate completion using Claude
103	*
104	* @param string $prompt The prompt to send
105	* @param array $options Additional options
106	* @return array Response data
107	* @throws \Exception If API request fails
108	*/
109	public function generate_completion(string $prompt, array $options = []): array {
110	$default_options = [
111	'model' => $this->model,
112	'max_tokens' => 1000,
113	'temperature' => 0.7,
114	];
115
116	$options = array_merge($default_options, $options);
117
118	// Callers may override the model via $options; self-heal retired IDs here too.
119	$options['model'] = self::normalize_model((string) $options['model']);
120
121	$body = [
122	'model' => $options['model'],
123	'max_tokens' => $options['max_tokens'],
124	'messages' => [
125	[
126	'role' => 'user',
127	'content' => $prompt,
128	]
129	],
130	];
131
132	// Newer Claude models (Opus 4.7/4.8, Sonnet 5, Fable 5) reject non-default
133	// sampling params with a 400. Only send `temperature` to models that accept it.
134	if (!$this->model_rejects_sampling_params($options['model'])) {
135	$body['temperature'] = $options['temperature'];
136	}
137
138	return $this->make_request('messages', $body);
139	}
140
141	/**
142	* Remap retired / unavailable Claude model IDs to the current default.
143	*
144	* Existing installs may have a stored `claude_model` that Anthropic has since
145	* retired (all `claude-3-*`) or deprecated to the point of returning 404
146	* (the `claude-*-4-0` / dated 4.0 aliases). Those IDs are self-healed to the
147	* recommended default so saved settings don't break API calls. A model not in
148	* this list — including a valid current model or a user-entered custom ID — is
149	* returned unchanged.
150	*
151	* @param string $model Model ID from settings
152	* @return string A usable model ID
153	*/
154	public static function normalize_model(string $model): string {
155	$retired = [
156	'claude-3-7-sonnet-latest', 'claude-3-7-sonnet-20250219',
157	'claude-3-5-sonnet-latest', 'claude-3-5-sonnet-20241022', 'claude-3-5-sonnet-20240620',
158	'claude-3-5-haiku-latest', 'claude-3-5-haiku-20241022',
159	'claude-3-opus-latest', 'claude-3-opus-20240229',
160	'claude-3-sonnet-20240229', 'claude-3-haiku-20240307',
161	'claude-sonnet-4-0', 'claude-sonnet-4-20250514',
162	'claude-opus-4-0', 'claude-opus-4-20250514',
163	];
164
165	return in_array($model, $retired, true) ? 'claude-sonnet-5' : $model;
166	}
167
168	/**
169	* Whether the given model rejects sampling params (temperature/top_p/top_k).
170	*
171	* Anthropic removed these on Opus 4.7+, Opus 5, Sonnet 5, and Fable 5 —
172	* including any date-suffixed or "-latest" alias of them — so they must be
173	* omitted from the request body or the API returns a 400.
174	*
175	* Every generate_* method below sends a temperature, so a model missing from
176	* this list fails on its first real call rather than at save time. `claude-opus-5`
177	* was absent while being offered in the UI, which made the flagship model
178	* unusable (#572).
179	*
180	* @param string $model Model ID
181	* @return bool
182	*/
183	private function model_rejects_sampling_params(string $model): bool {
184	foreach (['claude-opus-4-7', 'claude-opus-4-8', 'claude-opus-5', 'claude-sonnet-5', 'claude-fable-5', 'claude-mythos-5'] as $prefix) {
185	if (strpos($model, $prefix) === 0) {
186	return true;
187	}
188	}
189	return false;
190	}
191
192	/**
193	* Generate SEO metadata
194	*
195	* @param string $content Content to analyze
196	* @param array $options Generation options
197	* @return array Generated metadata
198	* @throws \Exception If generation fails
199	*/
200	public function generate_seo_metadata(string $content, array $options = []): array {
201	$target_keyword = $options['target_keyword'] ?? '';
202	$content_type = $options['content_type'] ?? 'blog_post';
203	$tone = $options['tone'] ?? 'professional';
204
205	$prompt_builder = $this->get_prompt_builder();
206	$language = is_string($options['language'] ?? null) ? $options['language'] : '';
207	$prompt = $prompt_builder->build_seo_prompt($content, $target_keyword, $content_type, $tone, 'claude', $language);
208
209	$response = $this->generate_completion($prompt, [
210	'max_tokens' => 500,
211	'temperature' => 0.3,
212	]);
213
214	return $this->parse_seo_response($response);
215	}
216
217	/**
218	* Analyze content for SEO optimization
219	*
220	* @param string $content Content to analyze
221	* @param array $metadata Existing metadata
222	* @return array Analysis results
223	* @throws \Exception If analysis fails
224	*/
225	public function analyze_content(string $content, array $metadata = []): array {
226	$prompt_builder = $this->get_prompt_builder();
227	$prompt = $prompt_builder->build_analysis_prompt($content, $metadata, 'claude');
228
229	$response = $this->generate_completion($prompt, [
230	'max_tokens' => 800,
231	'temperature' => 0.3,
232	]);
233
234	return $this->parse_analysis_response($response);
235	}
236
237	/**
238	* Get current model
239	*
240	* @return string Current model name
241	*/
242	public function get_model(): string {
243	return $this->model;
244	}
245
246	/**
247	* Maximum completion (output) tokens accepted for a single Claude request.
248	*
249	* 8192 is accepted by every current Claude model without the extended-output
250	* beta header, so it is a safe per-request ceiling. Kept as a method (rather
251	* than a constant) to mirror the other clients and allow per-model tuning.
252	*
253	* @param string $model Model ID (reserved for future per-model limits).
254	* @return int Maximum output tokens.
255	*/
256	private function get_max_completion_tokens(string $model): int {
257	return 8192;
258	}
259
260	/**
261	* Recommended output-token budget for a given use case.
262	*
263	* Mirrors the other clients so the Content Brief generator no longer falls
264	* back to a hardcoded, model-blind budget for Claude (issue #287). Each
265	* value is a fraction of the model's completion ceiling.
266	*
267	* @param string $use_case e.g. 'content_brief', 'seo_metadata', 'analysis'.
268	* @return int Recommended max output tokens.
269	*/
270	public function get_recommended_tokens(string $use_case): int {
271	$max_tokens = $this->get_max_completion_tokens($this->model);
272
273	$recommendations = [
274	'content_brief' => 0.9, // Comprehensive brief incl. a full article body.
275	'seo_metadata' => 0.15,
276	'analysis' => 0.25,
277	'llms_txt' => 0.5,
278	'optimization' => 0.15,
279	];
280	$percentage = $recommendations[$use_case] ?? 0.15;
281
282	return (int) ($max_tokens * $percentage);
283	}
284
285	/**
286	* Test API connection
287	*
288	* @return bool True if connection successful
289	*/
290	public function test_connection(): bool {
291	try {
292	// Claude doesn't have a models endpoint, so we'll test with a simple message
293	$response = $this->generate_completion('Hello', ['max_tokens' => 10]);
294	return isset($response['content']) && is_array($response['content']);
295	} catch (\Exception $e) {
296	return false;
297	}
298	}
299
300	/**
301	* Make API request to Claude
302	*
303	* @param string $endpoint API endpoint
304	* @param array $body Request body
305	* @return array Response data
306	* @throws \Exception If request fails
307	*/
308	private function make_request(string $endpoint, array $body = []): array {
309	$url = self::API_BASE_URL . '/' . ltrim($endpoint, '/');
310
311	$args = [
312	'timeout' => $this->timeout,
313	'headers' => [
314	'x-api-key' => $this->api_key,
315	'Content-Type' => 'application/json',
316	'anthropic-version' => '2023-06-01',
317	'User-Agent' => 'ThinkRank/' . THINKRANK_VERSION,
318	],
319	'method' => 'POST',
320	'body' => wp_json_encode($body),
321	];
322
323	$response = $this->request_with_retry($url, $args);
324
325	if (is_wp_error($response)) {
326	throw new \Exception('API request failed: ' . esc_html($response->get_error_message()));
327	}
328
329	$status_code = wp_remote_retrieve_response_code($response);
330	$response_body = wp_remote_retrieve_body($response);
331
332	if ($status_code >= 400) {
333	$error_data = json_decode($response_body, true);
334	$error_message = $error_data['error']['message'] ?? 'Unknown API error';
335	throw new \Exception(sprintf('Claude API error (%d): %s', (int) $status_code, esc_html($error_message)));
336	}
337
338	$data = json_decode($response_body, true);
339
340	if (json_last_error() !== JSON_ERROR_NONE) {
341	throw new \Exception('Invalid JSON response from Claude API');
342	}
343
344	// A valid-but-scalar body (null/number/string from a proxy/gateway on a
345	// 2xx) would violate this method's : array return type; reject it here so
346	// it surfaces as a catchable \Exception, not an uncatchable TypeError.
347	if (!is_array($data)) {
348	throw new \Exception('Unexpected non-array response from Claude API');
349	}
350
351	return $data;
352	}
353
354	/**
355	* Perform an HTTP request, retrying transient failures (429 / 5xx / network)
356	* per the plugin's retry settings, honoring a Retry-After header when given.
357	*
358	* @param string $url Request URL
359	* @param array $args wp_remote_request arguments
360	* @return array\|\WP_Error Final response (or last error after retries)
361	*/
362	private function request_with_retry(string $url, array $args) {
363	$settings = \ThinkRank\Core\Settings::instance();
364	$retry_enabled = (bool) $settings->get('retry_failed_requests', true);
365	$max_attempts = $retry_enabled ? max(1, (int) $settings->get('retry_attempts', 3)) : 1;
366
367	$response = null;
368	for ($attempt = 1; $attempt <= $max_attempts; $attempt++) {
369	// Keep PHP alive for the whole blocking call (see method docblock).
370	$this->raise_request_time_limit();
371
372	$response = wp_remote_request($url, $args);
373
374	$is_transient = false;
375	$retry_after = 0;
376	if (is_wp_error($response)) {
377	// A client-side timeout means the work genuinely needs longer
378	// than the budget we allowed; re-running the identical prompt,
379	// model and budget just times out again and multiplies the
380	// wait (issue #288). Do not retry a timeout. Other WP_Error
381	// results — DNS, connection refused, TLS — stay retryable.
382	$is_transient = !$this->is_timeout_error($response);
383	} else {
384	$status = wp_remote_retrieve_response_code($response);
385	if (429 === $status \|\| $status >= 500) {
386	$is_transient = true;
387	$retry_after = (int) wp_remote_retrieve_header($response, 'retry-after');
388	}
389	}
390
391	if (!$is_transient \|\| $attempt === $max_attempts) {
392	break;
393	}
394
395	$delay = $retry_after > 0 ? min($retry_after, 30) : min(2 ** ($attempt - 1), 8);
396	sleep($delay);
397	}
398
399	return $response;
400	}
401
402	/**
403	* Give PHP enough execution time to outlive a blocking AI HTTP request.
404	*
405	* The provider call blocks for up to $this->timeout seconds, but the web
406	* SAPI's default max_execution_time (commonly 30s) is shorter — so PHP
407	* fatally terminates the script mid-request (inside the cURL transport),
408	* which the web server surfaces as a 502 Bad Gateway. Resetting the limit
409	* before each attempt keeps the script alive for the full call; PHP-FPM's
410	* request_terminate_timeout still caps the absolute maximum. No-op when
411	* set_time_limit() is disabled (e.g. via disable_functions or safe mode).
412	*
413	* @return void
414	*/
415	private function raise_request_time_limit(): void {
416	if (function_exists('set_time_limit')) {
417	@set_time_limit($this->timeout + 45); // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- set_time_limit() warns when disabled by host policy; the guard is intentional.
418	}
419	}
420
421	/**
422	* Parse SEO response from Claude
423	*
424	* @param array $response Claude response
425	* @return array Parsed metadata
426	* @throws \Exception If parsing fails
427	*/
428	private function parse_seo_response(array $response): array {
429	if (!isset($response['content'][0]['text'])) {
430	throw new \Exception('Invalid response format from Claude');
431	}
432
433	$content = $response['content'][0]['text'];
434	$ai_text = $content; // Store the raw AI-generated text (Content Brief pattern)
435
436	// Try to extract JSON from the response
437	$json_start = strpos($content, '{');
438	$json_end = strrpos($content, '}');
439
440	if (false === $json_start \|\| false === $json_end) {
441	throw new \Exception('No valid JSON found in Claude response');
442	}
443
444	$json_content = substr($content, $json_start, $json_end - $json_start + 1);
445	$metadata = json_decode($json_content, true);
446
447	if (json_last_error() !== JSON_ERROR_NONE) {
448	throw new \Exception('Failed to parse JSON from Claude response');
449	}
450
451	// Validate required fields
452	$required_fields = ['title', 'description', 'focus_keyword'];
453	foreach ($required_fields as $field) {
454	if (!isset($metadata[$field])) {
455	throw new \Exception(sprintf('Missing required field: %s', esc_html($field)));
456	}
457	}
458
459	return [
460	'title' => sanitize_text_field($metadata['title']),
461	'description' => sanitize_text_field($metadata['description']),
462	'focus_keyword' => sanitize_text_field($metadata['focus_keyword']),
463	'suggestions' => array_map('sanitize_text_field', $metadata['suggestions'] ?? []),
464	'generated_at' => current_time('mysql'),
465	'tokens_used' => ($response['usage']['input_tokens'] ?? 0) + ($response['usage']['output_tokens'] ?? 0),
466	'_ai_text' => $ai_text, // Store the raw AI-generated text (Content Brief pattern)
467	];
468	}
469
470	/**
471	* Parse analysis response from Claude
472	*
473	* @param array $response Claude API response
474	* @return array Parsed analysis data
475	* @throws \Exception If parsing fails
476	*/
477	private function parse_analysis_response(array $response): array {
478	if (!isset($response['content'][0]['text'])) {
479	throw new \Exception('Invalid response format from Claude');
480	}
481
482	$content = trim($response['content'][0]['text']);
483	$ai_text = $content; // Store the raw AI-generated text (Content Brief pattern)
484
485	// Extract JSON from response
486	$json_start = strpos($content, '{');
487	$json_end = strrpos($content, '}');
488
489	if (false === $json_start \|\| false === $json_end) {
490	throw new \Exception('No valid JSON found in response');
491	}
492
493	$json_content = substr($content, $json_start, $json_end - $json_start + 1);
494	$analysis = json_decode($json_content, true);
495
496	if (json_last_error() !== JSON_ERROR_NONE) {
497	throw new \Exception('Failed to parse JSON response: ' . esc_html(json_last_error_msg()));
498	}
499
500	// Validate and sanitize response
501	return [
502	'seo_score' => min(100, max(0, (int) ($analysis['seo_score'] ?? 0))),
503	'content_analysis' => [
504	'word_count' => (int) ($analysis['content_analysis']['word_count'] ?? 0),
505	'readability' => sanitize_text_field($analysis['content_analysis']['readability'] ?? 'unknown'),
506	'keyword_density' => sanitize_text_field($analysis['content_analysis']['keyword_density'] ?? 'unknown'),
507	'structure' => sanitize_text_field($analysis['content_analysis']['structure'] ?? 'unknown'),
508	],
509	'suggestions' => array_map('sanitize_text_field', $analysis['suggestions'] ?? []),
510	'strengths' => array_map('sanitize_text_field', $analysis['strengths'] ?? []),
511	'weaknesses' => array_map('sanitize_text_field', $analysis['weaknesses'] ?? []),
512	'analyzed_at' => current_time('mysql'),
513	'tokens_used' => ($response['usage']['input_tokens'] ?? 0) + ($response['usage']['output_tokens'] ?? 0),
514	'_ai_text' => $ai_text, // Store the raw AI-generated text (Content Brief pattern)
515	];
516	}
517
518	/**
519	* Optimize site identity using Claude
520	*
521	* @since 1.0.0
522	*
523	* @param array $site_data Site data to optimize
524	* @param array $options Optimization options
525	* @return array Optimization results
526	* @throws \Exception If optimization fails
527	*/
528	public function optimize_site_identity(array $site_data, array $options = []): array {
529	$business_type = $options['business_type'] ?? 'website';
530	$target_audience = $options['target_audience'] ?? 'general';
531	$tone = $options['tone'] ?? 'professional';
532
533	$prompt_builder = $this->get_prompt_builder();
534	$prompt = $prompt_builder->build_site_identity_prompt($site_data, $business_type, $target_audience, $tone, 'claude');
535
536	$response = $this->make_request('messages', [
537	'model' => $this->model,
538	'max_tokens' => 600,
539	'temperature' => 0.4,
540	'messages' => [
541	[
542	'role' => 'user',
543	'content' => $prompt
544	]
545	]
546	]);
547
548	return $this->parse_site_identity_response($response);
549	}
550
551	/**
552	* Parse site identity optimization response
553	*
554	* @param array $response Claude API response
555	* @return array Parsed optimization data
556	* @throws \Exception If parsing fails
557	*/
558	private function parse_site_identity_response(array $response): array {
559	if (!isset($response['content'][0]['text'])) {
560	throw new \Exception('Invalid response format from Claude');
561	}
562
563	$content = trim($response['content'][0]['text']);
564	$ai_text = $content; // Store the raw AI-generated text (Content Brief pattern)
565
566	// Extract JSON from response
567	$json_start = strpos($content, '{');
568	$json_end = strrpos($content, '}');
569
570	if (false === $json_start \|\| false === $json_end) {
571	throw new \Exception('No valid JSON found in response');
572	}
573
574	$json_content = substr($content, $json_start, $json_end - $json_start + 1);
575	$optimization = json_decode($json_content, true);
576
577	if (json_last_error() !== JSON_ERROR_NONE) {
578	throw new \Exception('Failed to parse JSON response: ' . esc_html(json_last_error_msg()));
579	}
580
581	// Validate and sanitize response
582	return [
583	'optimized_data' => [
584	'site_name' => sanitize_text_field($optimization['optimized_data']['site_name'] ?? ''),
585	'site_description' => sanitize_text_field($optimization['optimized_data']['site_description'] ?? ''),
586	'tagline' => sanitize_text_field($optimization['optimized_data']['tagline'] ?? ''),
587	'default_meta_description' => sanitize_text_field($optimization['optimized_data']['default_meta_description'] ?? ''),
588	],
589	'analysis' => sanitize_textarea_field($optimization['analysis'] ?? ''),
590	'suggestions' => array_map('sanitize_text_field', $optimization['suggestions'] ?? []),
591	'score' => min(100, max(0, (int) ($optimization['score'] ?? 0))),
592	'tokens_used' => ($response['usage']['input_tokens'] ?? 0) + ($response['usage']['output_tokens'] ?? 0),
593	'_ai_text' => $ai_text, // Store the raw AI-generated text (Content Brief pattern)
594	];
595	}
596
597	/**
598	* Optimize homepage meta content using AI (copying Site Identity pattern exactly)
599	*
600	* @since 1.0.0
601	*
602	* @param array $content_data Meta content data to optimize
603	* @param array $options Optimization options
604	* @return array Optimization results
605	* @throws \Exception If optimization fails
606	*/
607	public function optimize_homepage_meta(array $content_data, array $options = []): array {
608	$business_type = $options['business_type'] ?? 'website';
609	$target_audience = $options['target_audience'] ?? 'general';
610	$tone = $options['tone'] ?? 'professional';
611	$context = $options['context'] ?? [];
612
613	$prompt_builder = $this->get_prompt_builder();
614	$prompt = $prompt_builder->build_homepage_meta_prompt($content_data, $business_type, $target_audience, $tone, $context, 'claude');
615
616	$response = $this->make_request('messages', [
617	'model' => $this->model,
618	'max_tokens' => 600,
619	'temperature' => 0.4,
620	'messages' => [
621	[
622	'role' => 'user',
623	'content' => $prompt
624	]
625	]
626	]);
627
628	return $this->parse_homepage_meta_response($response);
629	}
630
631	/**
632	* Optimize homepage hero content using AI (copying Site Identity pattern exactly)
633	*
634	* @since 1.0.0
635	*
636	* @param array $hero_data Hero content data to optimize
637	* @param array $options Optimization options
638	* @return array Optimization results
639	* @throws \Exception If optimization fails
640	*/
641	public function optimize_homepage_hero(array $hero_data, array $options = []): array {
642	$business_type = $options['business_type'] ?? 'website';
643	$target_audience = $options['target_audience'] ?? 'general';
644	$tone = $options['tone'] ?? 'professional';
645	$context = $options['context'] ?? [];
646
647	$prompt_builder = $this->get_prompt_builder();
648	$prompt = $prompt_builder->build_homepage_hero_prompt($hero_data, $business_type, $target_audience, $tone, $context, 'claude');
649
650	$response = $this->make_request('messages', [
651	'model' => $this->model,
652	'max_tokens' => 600,
653	'temperature' => 0.4,
654	'messages' => [
655	[
656	'role' => 'user',
657	'content' => $prompt
658	]
659	]
660	]);
661
662	return $this->parse_homepage_hero_response($response);
663	}
664
665	/**
666	* Optimize LLMs.txt content using Claude
667	*
668	* @since 1.0.0
669	*
670	* @param array $website_data Website data to optimize
671	* @param array $options Optimization options
672	* @return array Optimization results
673	* @throws \Exception If optimization fails
674	*/
675	public function optimize_llms_txt(array $website_data, array $options = []): array {
676	// Use shared prompt builder for consistent prompts across all AI providers
677	$prompt_builder = $this->get_prompt_builder();
678	$prompt = $prompt_builder->build_llms_txt_prompt($website_data, $options, 'claude');
679
680	$response = $this->make_request('messages', [
681	'model' => $this->model,
682	'max_tokens' => 2000, // Increased for consistency with other providers
683	'temperature' => 0.4,
684	'messages' => [
685	[
686	'role' => 'user',
687	'content' => $prompt
688	]
689	]
690	]);
691
692	return $this->parse_llms_txt_response($response);
693	}
694
695
696
697	/**
698	* Parse LLMs.txt optimization response
699	*
700	* @param array $response Claude API response
701	* @return array Parsed optimization data
702	* @throws \Exception If parsing fails
703	*/
704	private function parse_llms_txt_response(array $response): array {
705	if (!isset($response['content'][0]['text'])) {
706	throw new \Exception('Invalid response format from Claude');
707	}
708
709	$content = trim($response['content'][0]['text']);
710	$ai_text = $content; // Store the raw AI-generated text (Content Brief pattern)
711
712	// Extract JSON from response
713	$json_start = strpos($content, '{');
714	$json_end = strrpos($content, '}');
715
716	if (false === $json_start \|\| false === $json_end) {
717	throw new \Exception('No valid JSON found in response');
718	}
719
720	$json_content = substr($content, $json_start, $json_end - $json_start + 1);
721	$optimization = json_decode($json_content, true);
722
723	if (json_last_error() !== JSON_ERROR_NONE) {
724	throw new \Exception('Invalid JSON in response: ' . esc_html(json_last_error_msg()));
725	}
726
727	// Validate and sanitize response
728	return [
729	'optimized_data' => [
730	'site_name' => sanitize_text_field($optimization['optimized_data']['site_name'] ?? ''),
731	'project_overview' => sanitize_textarea_field($optimization['optimized_data']['project_overview'] ?? ''),
732	'key_features' => sanitize_textarea_field($optimization['optimized_data']['key_features'] ?? ''),
733	'architecture' => sanitize_textarea_field($optimization['optimized_data']['architecture'] ?? ''),
734	'development_guidelines' => sanitize_textarea_field($optimization['optimized_data']['development_guidelines'] ?? ''),
735	'ai_context' => sanitize_textarea_field($optimization['optimized_data']['ai_context'] ?? ''),
736	],
737	'suggestions' => array_map('sanitize_text_field', $optimization['suggestions'] ?? []),
738	'tokens_used' => ($response['usage']['input_tokens'] ?? 0) + ($response['usage']['output_tokens'] ?? 0),
739	'_ai_text' => $ai_text, // Store the raw AI-generated text (Content Brief pattern)
740	];
741	}
742
743	/**
744	* Parse homepage meta optimization response
745	*
746	* @param array $response Claude API response
747	* @return array Parsed optimization data
748	* @throws \Exception If parsing fails
749	*/
750	private function parse_homepage_meta_response(array $response): array {
751	if (!isset($response['content'][0]['text'])) {
752	throw new \Exception('Invalid response format from Claude');
753	}
754
755	$content = trim($response['content'][0]['text']);
756	$ai_text = $content; // Store the raw AI-generated text (Content Brief pattern)
757
758	// Extract JSON from response
759	$json_start = strpos($content, '{');
760	$json_end = strrpos($content, '}');
761
762	if (false === $json_start \|\| false === $json_end) {
763	throw new \Exception('No valid JSON found in response');
764	}
765
766	$json_content = substr($content, $json_start, $json_end - $json_start + 1);
767	$optimization = json_decode($json_content, true);
768
769	if (json_last_error() !== JSON_ERROR_NONE) {
770	throw new \Exception('Failed to parse JSON response: ' . esc_html(json_last_error_msg()));
771	}
772
773	// Validate and sanitize response
774	return [
775	'optimized_data' => [
776	'title' => sanitize_text_field($optimization['optimized_data']['title'] ?? ''),
777	'meta_description' => sanitize_text_field($optimization['optimized_data']['meta_description'] ?? ''),
778	],
779	'analysis' => sanitize_textarea_field($optimization['analysis'] ?? ''),
780	'suggestions' => array_map('sanitize_text_field', $optimization['suggestions'] ?? []),
781	'score' => min(100, max(0, (int) ($optimization['score'] ?? 0))),
782	'tokens_used' => ($response['usage']['input_tokens'] ?? 0) + ($response['usage']['output_tokens'] ?? 0),
783	'_ai_text' => $ai_text, // Store the raw AI-generated text (Content Brief pattern)
784	];
785	}
786
787	/**
788	* Parse homepage hero optimization response
789	*
790	* @param array $response Claude API response
791	* @return array Parsed optimization data
792	* @throws \Exception If parsing fails
793	*/
794	private function parse_homepage_hero_response(array $response): array {
795	if (!isset($response['content'][0]['text'])) {
796	throw new \Exception('Invalid response format from Claude');
797	}
798
799	$content = trim($response['content'][0]['text']);
800	$ai_text = $content; // Store the raw AI-generated text (Content Brief pattern)
801
802	// Extract JSON from response
803	$json_start = strpos($content, '{');
804	$json_end = strrpos($content, '}');
805
806	if (false === $json_start \|\| false === $json_end) {
807	throw new \Exception('No valid JSON found in response');
808	}
809
810	$json_content = substr($content, $json_start, $json_end - $json_start + 1);
811	$optimization = json_decode($json_content, true);
812
813	if (json_last_error() !== JSON_ERROR_NONE) {
814	throw new \Exception('Failed to parse JSON response: ' . esc_html(json_last_error_msg()));
815	}
816
817	// Validate and sanitize response
818	return [
819	'optimized_data' => [
820	'hero_title' => sanitize_text_field($optimization['optimized_data']['hero_title'] ?? ''),
821	'hero_subtitle' => sanitize_text_field($optimization['optimized_data']['hero_subtitle'] ?? ''),
822	'hero_cta_text' => sanitize_text_field($optimization['optimized_data']['hero_cta_text'] ?? '')
823	],
824	'analysis' => sanitize_textarea_field($optimization['analysis'] ?? ''),
825	'suggestions' => array_map('sanitize_text_field', $optimization['suggestions'] ?? []),
826	'score' => min(100, max(0, (int) ($optimization['score'] ?? 0))),
827	'tokens_used' => ($response['usage']['input_tokens'] ?? 0) + ($response['usage']['output_tokens'] ?? 0),
828	'_ai_text' => $ai_text, // Store the raw AI-generated text (Content Brief pattern)
829	];
830	}
831	}
832