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