| @@ -1,1252 +1,93 @@ | ||
| 1 | -<?php | |
| 2 | -if (!defined('ABSPATH')) { | |
| 3 | - exit; // Exit if accessed directly | |
| 4 | -} | |
| 5 | - | |
| 6 | -class MxChat_Utils { | |
| 7 | - | |
| 8 | -/** | |
| 9 | - * Validate a client-supplied session id (plan-mxchat-20260731-d42bec). | |
| 10 | - * | |
| 11 | - * sanitize_text_field() — which every session_id read site used before this — | |
| 12 | - * preserves '/' and '..'. Harmless where the value is only an option or | |
| 13 | - * transient key suffix, but mxchat_send_delayed_transcript() interpolates it | |
| 14 | - * into a filesystem path, so '../../../../path/x' wrote, emailed and deleted a | |
| 15 | - * file outside the uploads dir. | |
| 16 | - * | |
| 17 | - * REJECTS rather than rewrites: a silently-stripped id would orphan the | |
| 18 | - * conversation it belongs to, which is harder to diagnose than a clean refusal. | |
| 19 | - * Returns '' for anything malformed, so call sites fall into the empty-session | |
| 20 | - * error paths they already have. | |
| 21 | - * | |
| 22 | - * The generator only ever emits 'mxchat_chat_' + 32 hex chars | |
| 23 | - * (class-mxchat-integrator.php, js/chat-script.js), so this is not restrictive | |
| 24 | - * in practice. Length ceiling is deliberate — session ids are also used as | |
| 25 | - * option-name suffixes, and WP option names cap at 191 chars. | |
| 26 | - * | |
| 27 | - * @param mixed $raw Raw request value. | |
| 28 | - * @return string The id if well-formed, '' otherwise. | |
| 29 | - */ | |
| 30 | -public static function sanitize_session_id($raw) { | |
| 31 | - if (!is_scalar($raw)) { | |
| 32 | - return ''; | |
| 33 | - } | |
| 34 | - $val = trim((string) $raw); | |
| 35 | - if ($val === '') { | |
| 36 | - return ''; | |
| 37 | - } | |
| 38 | - return preg_match('/\A[A-Za-z0-9_-]{1,128}\z/', $val) ? $val : ''; | |
| 39 | -} | |
| 40 | - | |
| 41 | -/** | |
| 42 | - * Centralized embedding model registry. Single source of truth for dimensions | |
| 43 | - * and provider, so model-switch protection logic doesn't drift across files. | |
| 44 | - */ | |
| 45 | -public static function embedding_model_registry() { | |
| 46 | - return array( | |
| 47 | - 'text-embedding-ada-002' => array('dims' => 1536, 'provider' => 'openai', 'label' => 'Ada 2'), | |
| 48 | - 'text-embedding-3-small' => array('dims' => 1536, 'provider' => 'openai', 'label' => 'TE3 Small'), | |
| 49 | - 'text-embedding-3-large' => array('dims' => 3072, 'provider' => 'openai', 'label' => 'TE3 Large'), | |
| 50 | - 'voyage-3-large' => array('dims' => 2048, 'provider' => 'voyage', 'label' => 'Voyage-3 Large'), | |
| 51 | - 'gemini-embedding-001' => array('dims' => 1536, 'provider' => 'gemini', 'label' => 'Gemini Embedding'), | |
| 52 | - ); | |
| 53 | -} | |
| 54 | - | |
| 55 | -public static function embedding_model_dimensions($model) { | |
| 56 | - $registry = self::embedding_model_registry(); | |
| 57 | - return isset($registry[$model]) ? (int) $registry[$model]['dims'] : 0; | |
| 58 | -} | |
| 59 | - | |
| 60 | -public static function embedding_model_label($model) { | |
| 61 | - $registry = self::embedding_model_registry(); | |
| 62 | - return isset($registry[$model]) ? $registry[$model]['label'] : $model; | |
| 63 | -} | |
| 64 | - | |
| 65 | -/** | |
| 66 | - * Returns the model that was last used to actually write embeddings into the | |
| 67 | - * KB. Differs from the user-selected setting once a switch has happened but | |
| 68 | - * no re-embed has occurred yet — that's the mismatch state we warn about. | |
| 69 | - */ | |
| 70 | -public static function get_active_embedding_model() { | |
| 71 | - return get_option('mxchat_active_embedding_model', ''); | |
| 72 | -} | |
| 73 | - | |
| 74 | -/** | |
| 75 | - * Stamp the model that produced the most recent successful embedding. Called | |
| 76 | - * from generate_embedding() right after the API responds with a valid vector. | |
| 77 | - */ | |
| 78 | -public static function stamp_active_embedding_model($model) { | |
| 79 | - if (!empty($model) && $model !== self::get_active_embedding_model()) { | |
| 80 | - update_option('mxchat_active_embedding_model', $model, false); | |
| 81 | - } | |
| 82 | -} | |
| 83 | - | |
| 84 | -/** | |
| 85 | - * Extract the 11-character YouTube video ID from a URL, or '' if the URL is | |
| 86 | - * not a single-video YouTube link. Single source of truth for both the KB | |
| 87 | - * ingestion side and the chat render side — do not duplicate this parsing. | |
| 88 | - * Channel, playlist, and search URLs deliberately return '' (only a URL that | |
| 89 | - * identifies one video can be embedded). | |
| 90 | - */ | |
| 91 | -public static function parse_youtube_id($url) { | |
| 92 | - if (!is_string($url) || $url === '' || !preg_match('#^https?://#i', $url)) { | |
| 93 | - return ''; | |
| 94 | - } | |
| 95 | - $host = strtolower((string) wp_parse_url($url, PHP_URL_HOST)); | |
| 96 | - $host = preg_replace('/^(www|m)\./', '', $host); | |
| 97 | - $path = (string) wp_parse_url($url, PHP_URL_PATH); | |
| 98 | - $id = ''; | |
| 99 | - if ($host === 'youtu.be') { | |
| 100 | - $segments = explode('/', ltrim($path, '/')); | |
| 101 | - $id = $segments[0] ?? ''; | |
| 102 | - } elseif (in_array($host, array('youtube.com', 'youtube-nocookie.com'), true)) { | |
| 103 | - if (preg_match('#^/(?:shorts|embed|live|v)/([A-Za-z0-9_-]+)#', $path, $m)) { | |
| 104 | - $id = $m[1]; | |
| 105 | - } elseif ($path === '/watch') { | |
| 106 | - parse_str((string) wp_parse_url($url, PHP_URL_QUERY), $query_vars); | |
| 107 | - $id = isset($query_vars['v']) ? (string) $query_vars['v'] : ''; | |
| 108 | - } | |
| 109 | - } | |
| 110 | - $id = preg_replace('/[^A-Za-z0-9_-]/', '', (string) $id); | |
| 111 | - return (strlen($id) === 11) ? $id : ''; | |
| 112 | -} | |
| 113 | - | |
| 114 | -/** | |
| 115 | - * UPDATED: Submit or update content (and its embedding) in the database. | |
| 116 | - * Stores in Pinecone if enabled, otherwise stores in WordPress DB. | |
| 117 | - * | |
| 118 | - * @param string $content The content to be embedded. | |
| 119 | - * @param string $source_url The source URL of the content. | |
| 120 | - * @param string $api_key The API key used for generating embeddings. | |
| 121 | - * @param string $vector_id Optional vector ID for Pinecone (if not provided, will use md5 of URL) | |
| 122 | - * @param string $bot_id The bot ID for multi-bot support | |
| 123 | - * @param string $content_type The type of content (post, page, pdf, url, manual, product, etc.) | |
| 124 | - * @return bool|WP_Error True on success, WP_Error on failure | |
| 125 | - */ | |
| 126 | -public static function submit_content_to_db($content, $source_url, $api_key, $vector_id = null, $bot_id = 'default', $content_type = 'content') { | |
| 127 | - global $wpdb; | |
| 128 | - $table_name = $wpdb->prefix . 'mxchat_system_prompt_content'; | |
| 129 | - | |
| 130 | - //error_log('[MXCHAT-DB] Starting database submission for URL: ' . $source_url . ' (Bot: ' . $bot_id . ', Type: ' . $content_type . ')'); | |
| 131 | - //error_log('[MXCHAT-DB] Content length: ' . strlen($content) . ' bytes'); | |
| 132 | - | |
| 133 | - // Sanitize the source URL | |
| 134 | - $source_url = esc_url_raw($source_url); | |
| 135 | - | |
| 136 | - // Sanitize content_type | |
| 137 | - $content_type = sanitize_key($content_type); | |
| 138 | - if (empty($content_type)) { | |
| 139 | - $content_type = 'content'; // Fallback for backwards compatibility | |
| 140 | - } | |
| 141 | - | |
| 142 | - // Just ensure UTF-8 validity without aggressive escaping | |
| 143 | - $safe_content = wp_check_invalid_utf8($content); | |
| 144 | - // Remove only null bytes and other control characters, but preserve newlines (\n = \x0A) and carriage returns (\r = \x0D) | |
| 145 | - $safe_content = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]/u', '', $safe_content); | |
| 146 | - | |
| 147 | - // Check if chunking should be applied | |
| 148 | - $chunker = MxChat_Chunker::from_settings(); | |
| 149 | - if ($chunker->should_chunk($safe_content)) { | |
| 150 | - //error_log('[MXCHAT-DB] Content exceeds chunk threshold, using chunked submission'); | |
| 151 | - return self::submit_chunked_content($safe_content, $source_url, $api_key, $bot_id, $content_type, $chunker); | |
| 152 | - } | |
| 153 | - | |
| 154 | - // UPDATED: Generate the embedding using bot-specific configuration | |
| 155 | - $embedding_vector = self::generate_embedding($content, $api_key, $bot_id); | |
| 156 | - | |
| 157 | - if (!is_array($embedding_vector)) { | |
| 158 | - // Surface the provider's real reason instead of a fixed string (4a7c0a). | |
| 159 | - $reason = is_wp_error($embedding_vector) | |
| 160 | - ? $embedding_vector->get_error_message() | |
| 161 | - : 'Failed to generate embedding for content'; | |
| 162 | - return new WP_Error('embedding_failed', $reason); | |
| 163 | - } | |
| 164 | - | |
| 165 | - //error_log('[MXCHAT-DB] Embedding generated successfully'); | |
| 166 | - | |
| 167 | - // UPDATED: Check if Pinecone is enabled for this specific bot | |
| 168 | - if (self::is_pinecone_enabled_for_bot($bot_id)) { | |
| 169 | - //error_log('[MXCHAT-DB] Pinecone is enabled for bot ' . $bot_id . ' - using Pinecone storage'); | |
| 170 | - // Store in Pinecone only | |
| 171 | - return self::store_in_pinecone_only($embedding_vector, $content, $source_url, $vector_id, $bot_id, $content_type); | |
| 172 | - } else { | |
| 173 | - //error_log('[MXCHAT-DB] Pinecone not enabled for bot ' . $bot_id . ' - using WordPress storage'); | |
| 174 | - // Store in WordPress database only | |
| 175 | - $embedding_vector_serialized = maybe_serialize($embedding_vector); | |
| 176 | - return self::store_in_wordpress_db($safe_content, $source_url, $embedding_vector_serialized, $table_name, $content_type); | |
| 177 | - } | |
| 178 | -} | |
| 179 | - | |
| 180 | -/** | |
| 181 | - * UPDATED: Check if Pinecone is enabled and properly configured for a specific bot | |
| 182 | - */ | |
| 183 | -private static function is_pinecone_enabled_for_bot($bot_id = 'default') { | |
| 184 | - // For default bot or when multi-bot is not active, use original method | |
| 185 | - if ($bot_id === 'default' || !class_exists('MxChat_Multi_Bot_Manager')) { | |
| 186 | - return self::is_pinecone_enabled(); | |
| 187 | - } | |
| 188 | - | |
| 189 | - // Get bot-specific Pinecone configuration | |
| 190 | - $bot_pinecone_config = apply_filters('mxchat_get_bot_pinecone_config', array(), $bot_id); | |
| 191 | - | |
| 192 | - if (empty($bot_pinecone_config)) { | |
| 193 | - // Fallback to default configuration | |
| 194 | - return self::is_pinecone_enabled(); | |
| 195 | - } | |
| 196 | - | |
| 197 | - $enabled_check = !empty($bot_pinecone_config['use_pinecone']) && $bot_pinecone_config['use_pinecone']; | |
| 198 | - $api_key_check = !empty($bot_pinecone_config['api_key']); | |
| 199 | - $host_check = !empty($bot_pinecone_config['host']); | |
| 200 | - | |
| 201 | - return $enabled_check && $api_key_check && $host_check; | |
| 202 | -} | |
| 203 | - | |
| 204 | -/** | |
| 205 | - * Check if Pinecone is enabled and properly configured (original method for default bot) | |
| 206 | - */ | |
| 207 | -private static function is_pinecone_enabled() { | |
| 208 | - $pinecone_options = get_option('mxchat_pinecone_addon_options'); | |
| 209 | - | |
| 210 | - if (empty($pinecone_options)) { | |
| 211 | - return false; | |
| 212 | - } | |
| 213 | - | |
| 214 | - $enabled_check = !empty($pinecone_options['mxchat_use_pinecone']) && $pinecone_options['mxchat_use_pinecone'] !== '0'; | |
| 215 | - $api_key_check = !empty($pinecone_options['mxchat_pinecone_api_key']); | |
| 216 | - $host_check = !empty($pinecone_options['mxchat_pinecone_host']); | |
| 217 | - | |
| 218 | - return $enabled_check && $api_key_check && $host_check; | |
| 219 | -} | |
| 220 | - | |
| 221 | -/** | |
| 222 | - * UPDATED: Store content in Pinecone only with bot support | |
| 223 | - */ | |
| 224 | -private static function store_in_pinecone_only($embedding_vector, $content, $source_url, $vector_id = null, $bot_id = 'default', $content_type = 'content') { | |
| 225 | - //error_log('[MXCHAT-PINECONE] ===== Using Pinecone-only storage for bot ' . $bot_id . ' ====='); | |
| 226 | - | |
| 227 | - // Get bot-specific Pinecone configuration | |
| 228 | - if ($bot_id === 'default' || !class_exists('MxChat_Multi_Bot_Manager')) { | |
| 229 | - $pinecone_options = get_option('mxchat_pinecone_addon_options'); | |
| 230 | - $api_key = $pinecone_options['mxchat_pinecone_api_key']; | |
| 231 | - $environment = $pinecone_options['mxchat_pinecone_environment'] ?? ''; | |
| 232 | - $index_name = $pinecone_options['mxchat_pinecone_index'] ?? ''; | |
| 233 | - $namespace = $pinecone_options['mxchat_pinecone_namespace'] ?? ''; | |
| 234 | - } else { | |
| 235 | - $bot_pinecone_config = apply_filters('mxchat_get_bot_pinecone_config', array(), $bot_id); | |
| 236 | - if (empty($bot_pinecone_config)) { | |
| 237 | - // Fallback to default configuration | |
| 238 | - $pinecone_options = get_option('mxchat_pinecone_addon_options'); | |
| 239 | - $api_key = $pinecone_options['mxchat_pinecone_api_key']; | |
| 240 | - $environment = $pinecone_options['mxchat_pinecone_environment'] ?? ''; | |
| 241 | - $index_name = $pinecone_options['mxchat_pinecone_index'] ?? ''; | |
| 242 | - $namespace = $pinecone_options['mxchat_pinecone_namespace'] ?? ''; | |
| 243 | - } else { | |
| 244 | - $api_key = $bot_pinecone_config['api_key']; | |
| 245 | - $environment = ''; // Not used in new Pinecone API | |
| 246 | - $index_name = ''; // Not used in new Pinecone API | |
| 247 | - $namespace = $bot_pinecone_config['namespace'] ?? ''; | |
| 248 | - } | |
| 249 | - } | |
| 250 | - | |
| 251 | - $result = self::store_in_pinecone_main( | |
| 252 | - $embedding_vector, | |
| 253 | - $content, | |
| 254 | - $source_url, | |
| 255 | - $api_key, | |
| 256 | - $environment, | |
| 257 | - $index_name, | |
| 258 | - $vector_id, | |
| 259 | - $bot_id, | |
| 260 | - $namespace, | |
| 261 | - $content_type | |
| 262 | - ); | |
| 263 | - | |
| 264 | - if (is_wp_error($result)) { | |
| 265 | - //error_log('[MXCHAT-PINECONE] Pinecone storage failed for bot ' . $bot_id . ': ' . $result->get_error_message()); | |
| 266 | - return $result; | |
| 267 | - } | |
| 268 | - | |
| 269 | - //error_log('[MXCHAT-PINECONE] Pinecone storage completed successfully for bot ' . $bot_id); | |
| 270 | - return true; | |
| 271 | -} | |
| 272 | - | |
| 273 | -/** | |
| 274 | - * Store content in WordPress database with progressive fallback | |
| 275 | - * UPDATED 2.5.6: Now includes content_type parameter | |
| 276 | - */ | |
| 277 | -private static function store_in_wordpress_db($safe_content, $source_url, $embedding_vector_serialized, $table_name, $content_type = 'content') { | |
| 278 | - global $wpdb; | |
| 279 | - | |
| 280 | - //error_log('[MXCHAT-DB] ===== Using WordPress-only storage ====='); | |
| 281 | - | |
| 282 | - // Sanitize content_type | |
| 283 | - $content_type = sanitize_key($content_type); | |
| 284 | - if (empty($content_type)) { | |
| 285 | - $content_type = 'content'; // Fallback for backwards compatibility | |
| 286 | - } | |
| 287 | - | |
| 288 | - // ===== FIXED: Generate unique identifier for manual content ===== | |
| 289 | - $original_source_url = $source_url; | |
| 290 | - // Check if this is truly manual content (no URL at all) vs a real URL that filter_var rejects | |
| 291 | - // filter_var(FILTER_VALIDATE_URL) rejects valid URLs with encoded chars, non-ASCII, fragments, etc. | |
| 292 | - // Use a looser check: if it starts with http(s):// or has a scheme, it's a URL | |
| 293 | - $has_url_scheme = !empty($source_url) && preg_match('#^https?://#i', $source_url); | |
| 294 | - // Treat legacy mxchat.ai source URLs as manual — old bug assigned the site URL to manual entries | |
| 295 | - $is_legacy_mxchat_url = $has_url_scheme && strpos($source_url, 'mxchat.ai') !== false; | |
| 296 | - $is_manual_content = empty($source_url) || $source_url === '' || !$has_url_scheme || $is_legacy_mxchat_url; | |
| 297 | - | |
| 298 | - if ($is_manual_content) { | |
| 299 | - // Generate unique identifier for manual content to prevent overwrites | |
| 300 | - $source_url = 'mxchat://manual-content/' . time() . '-' . wp_generate_password(8, false); | |
| 301 | - //error_log('[MXCHAT-DB] Generated unique ID for manual content: ' . $source_url); | |
| 302 | - } | |
| 303 | - | |
| 304 | - // Only check for duplicates if we have a valid source URL (not manual content) | |
| 305 | - $existing_id = null; | |
| 306 | - if (!$is_manual_content) { | |
| 307 | - $existing_id = $wpdb->get_var( | |
| 308 | - $wpdb->prepare( | |
| 309 | - "SELECT id FROM {$table_name} WHERE source_url = %s LIMIT 1", | |
| 310 | - $source_url | |
| 311 | - ) | |
| 312 | - ); | |
| 313 | - //error_log('[MXCHAT-DB] Checked for existing URL, found ID: ' . ($existing_id ?: 'none')); | |
| 314 | - } else { | |
| 315 | - //error_log('[MXCHAT-DB] Manual content - will create new entry (no duplicate check)'); | |
| 316 | - } | |
| 317 | - // ===== END FIX ===== | |
| 318 | - | |
| 319 | - // Progressive fallback mechanism for problematic content | |
| 320 | - $attempt = 1; | |
| 321 | - $max_attempts = 3; | |
| 322 | - $current_content = $safe_content; | |
| 323 | - $result = false; | |
| 324 | - | |
| 325 | - while ($attempt <= $max_attempts && $result === false) { | |
| 326 | - try { | |
| 327 | - if ($existing_id) { | |
| 328 | - //error_log('[MXCHAT-DB] Found existing entry (ID: ' . $existing_id . '). Updating... (Attempt ' . $attempt . ')'); | |
| 329 | - | |
| 330 | - // Update the existing row - UPDATED 2.5.6: Added content_type | |
| 331 | - $result = $wpdb->update( | |
| 332 | - $table_name, | |
| 333 | - array( | |
| 334 | - 'url' => $source_url, | |
| 335 | - 'article_content' => $current_content, | |
| 336 | - 'embedding_vector' => $embedding_vector_serialized, | |
| 337 | - 'source_url' => $source_url, | |
| 338 | - 'content_type' => $content_type, | |
| 339 | - 'timestamp' => current_time('mysql'), | |
| 340 | - ), | |
| 341 | - array('id' => $existing_id), | |
| 342 | - array('%s','%s','%s','%s','%s','%s'), | |
| 343 | - array('%d') | |
| 344 | - ); | |
| 345 | - } else { | |
| 346 | - //error_log('[MXCHAT-DB] No existing entry found. Inserting new row... (Attempt ' . $attempt . ')'); | |
| 347 | - //error_log('[MXCHAT-DB] Content sample: ' . substr($current_content, 0, 1000)); | |
| 348 | - | |
| 349 | - // Insert a new row - UPDATED 2.5.6: Added content_type | |
| 350 | - $result = $wpdb->insert( | |
| 351 | - $table_name, | |
| 352 | - array( | |
| 353 | - 'url' => $source_url, // Now unique for manual content | |
| 354 | - 'article_content' => $current_content, | |
| 355 | - 'embedding_vector' => $embedding_vector_serialized, | |
| 356 | - 'source_url' => $source_url, // Now unique for manual content | |
| 357 | - 'content_type' => $content_type, | |
| 358 | - 'timestamp' => current_time('mysql'), | |
| 359 | - ), | |
| 360 | - array('%s','%s','%s','%s','%s','%s') | |
| 361 | - ); | |
| 362 | - } | |
| 363 | - | |
| 364 | - if ($result === false) { | |
| 365 | - //error_log('[MXCHAT-DB] Database operation failed (Attempt ' . $attempt . ')'); | |
| 366 | - //error_log('[MXCHAT-DB] MySQL Error: ' . $wpdb->last_error); | |
| 367 | - //error_log('[MXCHAT-DB] MySQL Error Number: ' . $wpdb->last_errno); | |
| 368 | - //error_log('[MXCHAT-DB] Last Query: ' . substr($wpdb->last_query, 0, 500)); | |
| 369 | - //error_log('[MXCHAT-DB] Content length: ' . strlen($current_content) . ' bytes'); | |
| 370 | - //error_log('[MXCHAT-DB] Embedding vector length: ' . strlen($embedding_vector_serialized) . ' bytes'); | |
| 371 | - | |
| 372 | - // Progressively apply more aggressive sanitization on failure | |
| 373 | - if ($attempt === 1) { | |
| 374 | - // First fallback: Use a more aggressive character filter and shorten | |
| 375 | - $current_content = preg_replace('/[^\p{L}\p{N}\s.,;:!?()-]/u', '', $current_content); | |
| 376 | - $current_content = substr($current_content, 0, 50000); | |
| 377 | - } else if ($attempt === 2) { | |
| 378 | - // Second fallback: Keep only alphanumeric and basic punctuation, shorten further | |
| 379 | - $current_content = preg_replace('/[^a-zA-Z0-9\s.,;:!?()-]/u', '', $current_content); | |
| 380 | - $current_content = substr($current_content, 0, 30000); | |
| 381 | - } | |
| 382 | - | |
| 383 | - $attempt++; | |
| 384 | - } | |
| 385 | - } catch (Exception $e) { | |
| 386 | - //error_log('[MXCHAT-DB] Exception during database operation: ' . $e->getMessage()); | |
| 387 | - $attempt++; | |
| 388 | - } | |
| 389 | - } | |
| 390 | - | |
| 391 | -if ($result === false) { | |
| 392 | - //error_log('[MXCHAT-DB] All database operation attempts failed'); | |
| 393 | - //error_log('[MXCHAT-DB] Final MySQL Error: ' . $wpdb->last_error); | |
| 394 | - | |
| 395 | - $detailed_error = sprintf( | |
| 396 | - 'Failed to store content in WordPress database after %d attempts. MySQL Error: %s (Error #%d). Content size: %d bytes, Embedding size: %d bytes', | |
| 397 | - $max_attempts, | |
| 398 | - $wpdb->last_error, | |
| 399 | - $wpdb->last_errno, | |
| 400 | - strlen($current_content), | |
| 401 | - strlen($embedding_vector_serialized) | |
| 402 | - ); | |
| 403 | - | |
| 404 | - return new WP_Error('database_failed', $detailed_error); | |
| 405 | -} | |
| 406 | - | |
| 407 | - //error_log('[MXCHAT-DB] WordPress database operation completed successfully (Attempt ' . ($attempt - 1) . ')'); | |
| 408 | - return true; | |
| 409 | -} | |
| 410 | - | |
| 411 | -/** | |
| 412 | - * UPDATED: Store content in Pinecone database with bot support | |
| 413 | - * UPDATED 2.5.6: Now accepts content_type parameter | |
| 414 | - */ | |
| 415 | -private static function store_in_pinecone_main($embedding_vector, $content, $url, $api_key, $environment, $index_name, $vector_id = null, $bot_id = 'default', $namespace = '', $content_type = 'content') { | |
| 416 | - //error_log('[MXCHAT-PINECONE-MAIN] ===== Starting Pinecone storage for bot ' . $bot_id . ' ====='); | |
| 417 | - | |
| 418 | - // ===== UPDATED: Handle manual content with unique vector IDs ===== | |
| 419 | - if ($vector_id) { | |
| 420 | - // Use provided vector ID | |
| 421 | - //error_log('[MXCHAT-PINECONE-MAIN] Using provided vector ID: ' . $vector_id); | |
| 422 | - } elseif (!empty($url) && preg_match('#^https?://#i', $url)) { | |
| 423 | - // For URLs, use URL-based ID (existing behavior) | |
| 424 | - $vector_id = md5($url); | |
| 425 | - //error_log('[MXCHAT-PINECONE-MAIN] Generated vector ID from URL: ' . $vector_id); | |
| 426 | - } else { | |
| 427 | - // For manual content (empty/no URL scheme), generate unique ID | |
| 428 | - $vector_id = 'manual_' . time() . '_' . substr(md5($content . microtime(true)), 0, 8); | |
| 429 | - //error_log('[MXCHAT-PINECONE-MAIN] Generated unique vector ID for manual content: ' . $vector_id); | |
| 430 | - } | |
| 431 | - // ===== END UPDATE ===== | |
| 432 | - | |
| 433 | - // Get host from bot-specific config or fallback to default | |
| 434 | - if ($bot_id === 'default' || !class_exists('MxChat_Multi_Bot_Manager')) { | |
| 435 | - $options = get_option('mxchat_pinecone_addon_options'); | |
| 436 | - $host = $options['mxchat_pinecone_host'] ?? ''; | |
| 437 | - } else { | |
| 438 | - $bot_pinecone_config = apply_filters('mxchat_get_bot_pinecone_config', array(), $bot_id); | |
| 439 | - if (!empty($bot_pinecone_config)) { | |
| 440 | - $host = $bot_pinecone_config['host'] ?? ''; | |
| 441 | - } else { | |
| 442 | - $options = get_option('mxchat_pinecone_addon_options'); | |
| 443 | - $host = $options['mxchat_pinecone_host'] ?? ''; | |
| 444 | - } | |
| 445 | - } | |
| 446 | - | |
| 447 | - //error_log('[MXCHAT-PINECONE-MAIN] Host: ' . $host); | |
| 448 | - //error_log('[MXCHAT-PINECONE-MAIN] API key length: ' . strlen($api_key)); | |
| 449 | - //error_log('[MXCHAT-PINECONE-MAIN] Bot ID: ' . $bot_id); | |
| 450 | - //error_log('[MXCHAT-PINECONE-MAIN] Namespace: ' . $namespace); | |
| 451 | - | |
| 452 | - if (empty($host)) { | |
| 453 | - //error_log('[MXCHAT-PINECONE-MAIN] ERROR: Host is empty'); | |
| 454 | - return new WP_Error('pinecone_config', 'Pinecone host is not configured. Please set the host in your bot settings.'); | |
| 455 | - } | |
| 456 | - | |
| 457 | - // ===== UPDATED 2.5.6: Use passed content_type or determine from URL if not provided ===== | |
| 458 | - // Sanitize content_type | |
| 459 | - $content_type = sanitize_key($content_type); | |
| 460 | - if (empty($content_type)) { | |
| 461 | - // Fallback to old detection logic for backwards compatibility | |
| 462 | - $is_product = false; | |
| 463 | - $content_type = 'manual'; // Default for manual content | |
| 464 | - | |
| 465 | - if (!empty($url) && preg_match('#^https?://#i', $url)) { | |
| 466 | - $is_product = (strpos($url, '/product/') !== false || strpos($url, '/shop/') !== false); | |
| 467 | - $content_type = $is_product ? 'product' : 'content'; | |
| 468 | - } | |
| 469 | - } | |
| 470 | - | |
| 471 | - //error_log('[MXCHAT-PINECONE-MAIN] Content type: ' . $content_type); | |
| 472 | - // ===== END UPDATE ===== | |
| 473 | - | |
| 474 | - $api_endpoint = "https://{$host}/vectors/upsert"; | |
| 475 | - //error_log('[MXCHAT-PINECONE-MAIN] API endpoint: ' . $api_endpoint); | |
| 476 | - | |
| 477 | - // UPDATED 2.5.6: Use provided content_type in metadata | |
| 478 | - $metadata = array( | |
| 479 | - 'text' => $content, | |
| 480 | - 'source_url' => $url, // Can be empty for manual content | |
| 481 | - 'type' => $content_type, // Now supports: post, page, pdf, url, manual, product, etc. | |
| 482 | - 'last_updated' => time(), | |
| 483 | - 'created_at' => time(), // Add creation timestamp | |
| 484 | - 'bot_id' => $bot_id, // Add bot identification | |
| 485 | - ); | |
| 486 | - | |
| 487 | - $vector_data = array( | |
| 488 | - 'id' => $vector_id, | |
| 489 | - 'values' => $embedding_vector, | |
| 490 | - 'metadata' => $metadata | |
| 491 | - ); | |
| 492 | - | |
| 493 | - $request_body = array( | |
| 494 | - 'vectors' => array($vector_data) | |
| 495 | - ); | |
| 496 | - | |
| 497 | - // Add namespace if specified for multi-bot separation | |
| 498 | - if (!empty($namespace)) { | |
| 499 | - $request_body['namespace'] = $namespace; | |
| 500 | - //error_log('[MXCHAT-PINECONE-MAIN] Using namespace: ' . $namespace); | |
| 501 | - } | |
| 502 | - | |
| 503 | - //error_log('[MXCHAT-PINECONE-MAIN] Request body prepared (embedding dimensions: ' . count($embedding_vector) . ')'); | |
| 504 | - | |
| 505 | - $response = wp_remote_post($api_endpoint, array( | |
| 506 | - 'headers' => array( | |
| 507 | - 'Api-Key' => $api_key, | |
| 508 | - 'accept' => 'application/json', | |
| 509 | - 'content-type' => 'application/json' | |
| 510 | - ), | |
| 511 | - 'body' => wp_json_encode($request_body), | |
| 512 | - 'timeout' => 30, | |
| 513 | - 'data_format' => 'body' | |
| 514 | - )); | |
| 515 | - | |
| 516 | - if (is_wp_error($response)) { | |
| 517 | - //error_log('[MXCHAT-PINECONE-MAIN] WordPress request error: ' . $response->get_error_message()); | |
| 518 | - return new WP_Error('pinecone_request', $response->get_error_message()); | |
| 519 | - } | |
| 520 | - | |
| 521 | - $response_code = wp_remote_retrieve_response_code($response); | |
| 522 | - //error_log('[MXCHAT-PINECONE-MAIN] Response code: ' . $response_code); | |
| 523 | - | |
| 524 | - if ($response_code !== 200) { | |
| 525 | - $body = wp_remote_retrieve_body($response); | |
| 526 | - //error_log('[MXCHAT-PINECONE-MAIN] API error - Response body: ' . $body); | |
| 527 | - return new WP_Error('pinecone_api', sprintf( | |
| 528 | - 'Pinecone API error (HTTP %d): %s', | |
| 529 | - $response_code, | |
| 530 | - $body | |
| 531 | - )); | |
| 532 | - } | |
| 533 | - | |
| 534 | - $response_body = wp_remote_retrieve_body($response); | |
| 535 | - //error_log('[MXCHAT-PINECONE-MAIN] Success response: ' . $response_body); | |
| 536 | - //error_log('[MXCHAT-PINECONE-MAIN] Successfully stored in Pinecone for bot ' . $bot_id); | |
| 537 | - //error_log('[MXCHAT-PINECONE-MAIN] ===== Pinecone storage complete ====='); | |
| 538 | - | |
| 539 | - return true; | |
| 540 | -} | |
| 541 | - | |
| 542 | -/** | |
| 543 | - * UPDATED: Generate an embedding for the given text using bot-specific configuration. | |
| 544 | - * | |
| 545 | - * @param string $text The text to be embedded. | |
| 546 | - * @param string $api_key The API key used for generating embeddings. | |
| 547 | - * @param string $bot_id The bot ID for multi-bot support | |
| 548 | - * @return array|null The embedding vector or null on failure. | |
| 549 | - */ | |
| 550 | -private static function generate_embedding($text, $api_key, $bot_id = 'default') { | |
| 551 | - // Get bot-specific options | |
| 552 | - if ($bot_id === 'default' || !class_exists('MxChat_Multi_Bot_Manager')) { | |
| 553 | - $options = get_option('mxchat_options'); | |
| 554 | - } else { | |
| 555 | - $bot_options = apply_filters('mxchat_get_bot_options', array(), $bot_id); | |
| 556 | - $options = !empty($bot_options) ? $bot_options : get_option('mxchat_options'); | |
| 557 | - } | |
| 558 | - | |
| 559 | - // Opt-in: when the custom provider is selected for embeddings, route the KB | |
| 560 | - // INDEX side through the same custom endpoint the query side uses, so stored | |
| 561 | - // vectors and query vectors come from the same model. Default-off behavior | |
| 562 | - // below is untouched. | |
| 563 | - if (isset($options['custom_provider_for_embeddings']) && $options['custom_provider_for_embeddings'] === 'on') { | |
| 564 | - $custom = self::generate_embedding_custom($text, $options); | |
| 565 | - // The custom path already returns a human-readable error string — | |
| 566 | - // carry it instead of collapsing to null (plan 4a7c0a). | |
| 567 | - return is_array($custom) ? $custom : new WP_Error('embedding_failed', (string) $custom); | |
| 568 | - } | |
| 569 | - | |
| 570 | - $selected_model = $options['embedding_model'] ?? 'text-embedding-ada-002'; | |
| 571 | - | |
| 572 | - // Determine endpoint and API key based on model | |
| 573 | - if (strpos($selected_model, 'voyage') === 0) { | |
| 574 | - $endpoint = 'https://api.voyageai.com/v1/embeddings'; | |
| 575 | - $api_key = $options['voyage_api_key'] ?? ''; | |
| 576 | - } elseif (strpos($selected_model, 'gemini-embedding') === 0) { | |
| 577 | - $endpoint = 'https://generativelanguage.googleapis.com/v1beta/models/' . $selected_model . ':embedContent'; | |
| 578 | - $api_key = $options['gemini_api_key'] ?? ''; | |
| 579 | - } else { | |
| 580 | - $endpoint = 'https://api.openai.com/v1/embeddings'; | |
| 581 | - // Use the bot-specific API key or fallback to passed API key | |
| 582 | - $api_key = $options['api_key'] ?? $api_key; | |
| 583 | - } | |
| 584 | - | |
| 585 | - // Prepare request body based on provider | |
| 586 | - if (strpos($selected_model, 'gemini-embedding') === 0) { | |
| 587 | - // Gemini API format | |
| 588 | - $request_body = [ | |
| 589 | - 'model' => 'models/' . $selected_model, | |
| 590 | - 'content' => [ | |
| 591 | - 'parts' => [ | |
| 592 | - ['text' => $text] | |
| 593 | - ] | |
| 594 | - ], | |
| 595 | - 'outputDimensionality' => 1536 | |
| 596 | - ]; | |
| 597 | - | |
| 598 | - // Prepare headers for Gemini (API key as query parameter) | |
| 599 | - $endpoint .= '?key=' . $api_key; | |
| 600 | - $headers = [ | |
| 601 | - 'Content-Type' => 'application/json' | |
| 602 | - ]; | |
| 603 | - } else { | |
| 604 | - // OpenAI/Voyage API format | |
| 605 | - $request_body = [ | |
| 606 | - 'input' => $text, | |
| 607 | - 'model' => $selected_model | |
| 608 | - ]; | |
| 609 | - | |
| 610 | - // Add output_dimension for voyage-3-large | |
| 611 | - if ($selected_model === 'voyage-3-large') { | |
| 612 | - $request_body['output_dimension'] = 2048; | |
| 613 | - } | |
| 614 | - | |
| 615 | - // Prepare headers for OpenAI/Voyage | |
| 616 | - $headers = [ | |
| 617 | - 'Content-Type' => 'application/json', | |
| 618 | - 'Authorization' => 'Bearer ' . $api_key | |
| 619 | - ]; | |
| 620 | - } | |
| 621 | - | |
| 622 | - $args = [ | |
| 623 | - 'body' => wp_json_encode($request_body), | |
| 624 | - 'headers' => $headers, | |
| 625 | - 'timeout' => 60, | |
| 626 | - 'redirection' => 5, | |
| 627 | - 'blocking' => true, | |
| 628 | - 'httpversion' => '1.0', | |
| 629 | - 'sslverify' => true, | |
| 630 | - ]; | |
| 631 | - | |
| 632 | - $response = wp_remote_post($endpoint, $args); | |
| 633 | - | |
| 634 | - if (is_wp_error($response)) { | |
| 635 | - $message = 'Embedding request failed (connection): ' . $response->get_error_message(); | |
| 636 | - if (class_exists('MxChat_Admin')) { | |
| 637 | - MxChat_Admin::mxchat_log_debug('embedding_error', $message, array('model' => $selected_model, 'bot_id' => $bot_id)); | |
| 638 | - } | |
| 639 | - return new WP_Error('embedding_failed', $message); | |
| 640 | - } | |
| 641 | - | |
| 642 | - $response_body = json_decode(wp_remote_retrieve_body($response), true); | |
| 643 | - | |
| 644 | - // Handle different response formats based on provider | |
| 645 | - if (strpos($selected_model, 'gemini-embedding') === 0) { | |
| 646 | - // Gemini API response format | |
| 647 | - if (isset($response_body['embedding']['values']) && is_array($response_body['embedding']['values'])) { | |
| 648 | - self::stamp_active_embedding_model($selected_model); | |
| 649 | - return $response_body['embedding']['values']; | |
| 650 | - } else { | |
| 651 | - return self::embedding_failure_error($response, $selected_model, $api_key, $bot_id); | |
| 652 | - } | |
| 653 | - } else { | |
| 654 | - // OpenAI/Voyage API response format | |
| 655 | - if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) { | |
| 656 | - self::stamp_active_embedding_model($selected_model); | |
| 657 | - return $response_body['data'][0]['embedding']; | |
| 658 | - } else { | |
| 659 | - return self::embedding_failure_error($response, $selected_model, $api_key, $bot_id); | |
| 660 | - } | |
| 661 | - } | |
| 662 | -} | |
| 663 | - | |
| 664 | -/** | |
| 665 | - * Build a WP_Error carrying the embedding provider's REAL failure reason, | |
| 666 | - * and record it in the Debug Mode log. Previously every failure path | |
| 667 | - * returned bare null, so customers saw only "Failed to generate embedding | |
| 668 | - * for content" / "Failed to store any chunks" with no cause (plan 4a7c0a). | |
| 669 | - * | |
| 670 | - * The API key never appears in provider response bodies (it travels in the | |
| 671 | - * request headers), but the reason is scrubbed for it anyway before it can | |
| 672 | - * reach a notice or the debug log. | |
| 673 | - */ | |
| 674 | -private static function embedding_failure_error($response, $selected_model, $api_key, $bot_id) { | |
| 675 | - $status = (int) wp_remote_retrieve_response_code($response); | |
| 676 | - $raw = (string) wp_remote_retrieve_body($response); | |
| 677 | - $decoded = json_decode($raw, true); | |
| 678 | - | |
| 679 | - // Provider error shapes: OpenAI + Gemini use {"error":{"message":…}}; | |
| 680 | - // Voyage uses {"detail":…}. | |
| 681 | - $reason = ''; | |
| 682 | - if (is_array($decoded)) { | |
| 683 | - if (isset($decoded['error']['message']) && is_string($decoded['error']['message'])) { | |
| 684 | - $reason = $decoded['error']['message']; | |
| 685 | - } elseif (isset($decoded['detail']) && is_string($decoded['detail'])) { | |
| 686 | - $reason = $decoded['detail']; | |
| 687 | - } | |
| 688 | - } | |
| 689 | - if ($reason === '') { | |
| 690 | - $reason = ($raw !== '') ? substr($raw, 0, 200) : 'empty or malformed response'; | |
| 691 | - } | |
| 692 | - if (is_string($api_key) && $api_key !== '') { | |
| 693 | - $reason = str_replace($api_key, '[redacted]', $reason); | |
| 694 | - } | |
| 695 | - $reason = substr($reason, 0, 300); | |
| 696 | - $message = sprintf('Embedding failed (%s, HTTP %d): %s', $selected_model, $status, $reason); | |
| 697 | - | |
| 698 | - if (class_exists('MxChat_Admin')) { | |
| 699 | - MxChat_Admin::mxchat_log_debug('embedding_error', $message, array( | |
| 700 | - 'model' => $selected_model, | |
| 701 | - 'status' => $status, | |
| 702 | - 'bot_id' => $bot_id, | |
| 703 | - )); | |
| 704 | - } | |
| 705 | - | |
| 706 | - return new WP_Error('embedding_failed', $message); | |
| 707 | -} | |
| 708 | - | |
| 709 | -/** | |
| 710 | - * Generate an embedding via a Custom (OpenAI-compatible) provider's /embeddings route. | |
| 711 | - * Shared by every embedding entry point so the KNOWLEDGE-BASE INDEX side and the | |
| 712 | - * QUERY side route through the same model when the opt-in | |
| 713 | - * 'custom_provider_for_embeddings' setting is on. Mirrors the query-path logic in | |
| 714 | - * MxChat_Integrator::mxchat_generate_embedding_custom() but takes an explicit | |
| 715 | - * $options array so it is callable statically from utils + knowledge-manager. | |
| 716 | - * | |
| 717 | - * Returns a numeric array (the embedding vector) on success, or a human-readable | |
| 718 | - * error string on failure (so callers expecting a string error, like the | |
| 719 | - * knowledge-manager, can surface it directly; callers expecting array|null wrap it). | |
| 720 | - * | |
| 721 | - * @param string $text Text to embed. | |
| 722 | - * @param array $options The resolved mxchat options (must contain the custom_provider_* keys). | |
| 723 | - * @return array|string Embedding vector on success; error string on failure. | |
| 724 | - */ | |
| 725 | -public static function generate_embedding_custom($text, $options) { | |
| 726 | - if (empty($text)) { | |
| 727 | - return 'No text provided for embedding generation'; | |
| 728 | - } | |
| 729 | - | |
| 730 | - $base_url = isset($options['custom_provider_base_url']) ? rtrim(trim((string) $options['custom_provider_base_url']), '/') : ''; | |
| 731 | - if (empty($base_url)) { | |
| 732 | - return 'Custom provider Base URL is not configured.'; | |
| 733 | - } | |
| 734 | - | |
| 735 | - $api_key = isset($options['custom_provider_api_key']) ? trim((string) $options['custom_provider_api_key']) : ''; | |
| 736 | - $auth_scheme = isset($options['custom_provider_auth_scheme']) ? $options['custom_provider_auth_scheme'] : 'bearer'; | |
| 737 | - $api_version = isset($options['custom_provider_api_version']) ? trim((string) $options['custom_provider_api_version']) : ''; | |
| 738 | - | |
| 739 | - // Embedding model: prefer the dedicated custom_provider_embedding_model, fall back to the chat model. | |
| 740 | - $model = (isset($options['custom_provider_embedding_model']) && trim((string) $options['custom_provider_embedding_model']) !== '') | |
| 741 | - ? trim((string) $options['custom_provider_embedding_model']) | |
| 742 | - : ((isset($options['custom_provider_model']) && trim((string) $options['custom_provider_model']) !== '') ? trim((string) $options['custom_provider_model']) : 'default'); | |
| 743 | - | |
| 744 | - $embed_url = $base_url . '/embeddings'; | |
| 745 | - if (!empty($api_version)) { | |
| 746 | - $embed_url .= (strpos($embed_url, '?') === false ? '?' : '&') . 'api-version=' . rawurlencode($api_version); | |
| 747 | - } | |
| 748 | - | |
| 749 | - $headers = ['Content-Type' => 'application/json']; | |
| 750 | - if (!empty($api_key)) { | |
| 751 | - if ($auth_scheme === 'api-key') { | |
| 752 | - $headers['api-key'] = $api_key; | |
| 753 | - } else { | |
| 754 | - $headers['Authorization'] = 'Bearer ' . $api_key; | |
| 755 | - } | |
| 756 | - } | |
| 757 | - | |
| 758 | - $response = wp_remote_post($embed_url, [ | |
| 759 | - 'headers' => $headers, | |
| 760 | - 'body' => wp_json_encode(['input' => $text, 'model' => $model]), | |
| 761 | - 'timeout' => 60, | |
| 762 | - ]); | |
| 763 | - if (is_wp_error($response)) { | |
| 764 | - return 'Connection error when generating embeddings (custom provider): ' . $response->get_error_message(); | |
| 765 | - } | |
| 766 | - | |
| 767 | - $status = wp_remote_retrieve_response_code($response); | |
| 768 | - $body = json_decode(wp_remote_retrieve_body($response), true); | |
| 769 | - if ($status !== 200) { | |
| 770 | - $msg = isset($body['error']['message']) ? $body['error']['message'] : 'HTTP ' . $status; | |
| 771 | - return 'Custom embedding endpoint error: ' . $msg; | |
| 772 | - } | |
| 773 | - if (isset($body['data'][0]['embedding']) && is_array($body['data'][0]['embedding'])) { | |
| 774 | - // Stamp the custom model identity so the active-embedding-model mismatch | |
| 775 | - // warning reflects the real (custom) model rather than the built-in setting. | |
| 776 | - self::stamp_active_embedding_model('custom:' . $model); | |
| 777 | - return $body['data'][0]['embedding']; | |
| 778 | - } | |
| 779 | - return 'Invalid embedding response from custom provider.'; | |
| 780 | -} | |
| 781 | - | |
| 782 | -/** | |
| 783 | - * Submit content as multiple chunks | |
| 784 | - * | |
| 785 | - * Splits large content into chunks, generates embeddings for each, | |
| 786 | - * and stores them with chunk metadata for later reassembly. | |
| 787 | - * | |
| 788 | - * @param string $content The content to chunk and store | |
| 789 | - * @param string $source_url The source URL | |
| 790 | - * @param string $api_key The API key for embeddings | |
| 791 | - * @param string $bot_id The bot ID | |
| 792 | - * @param string $content_type The content type | |
| 793 | - * @param MxChat_Chunker $chunker The chunker instance | |
| 794 | - * @return bool|WP_Error True on success, WP_Error on failure | |
| 795 | - */ | |
| 796 | -private static function submit_chunked_content($content, $source_url, $api_key, $bot_id, $content_type, $chunker) { | |
| 797 | - global $wpdb; | |
| 798 | - $table_name = $wpdb->prefix . 'mxchat_system_prompt_content'; | |
| 799 | - | |
| 800 | - //error_log('[MXCHAT-CHUNK-DEBUG] Starting chunked submission for: ' . $source_url); | |
| 801 | - //error_log('[MXCHAT-CHUNK-DEBUG] Content length: ' . strlen($content) . ' chars'); | |
| 802 | - | |
| 803 | - // First, delete any existing chunks for this URL (clean slate) | |
| 804 | - $delete_result = self::delete_chunks_for_url($source_url, $bot_id); | |
| 805 | - if (is_wp_error($delete_result)) { | |
| 806 | - //error_log('[MXCHAT-CHUNK-DEBUG] Warning: Failed to delete existing chunks: ' . $delete_result->get_error_message()); | |
| 807 | - // Continue anyway - we'll overwrite with upsert | |
| 808 | - } | |
| 809 | - | |
| 810 | - // Split content into chunks | |
| 811 | - $chunks = $chunker->chunk_text($content); | |
| 812 | - $total_chunks = count($chunks); | |
| 813 | - | |
| 814 | - //error_log('[MXCHAT-CHUNK-DEBUG] Created ' . $total_chunks . ' chunks'); | |
| 815 | - foreach ($chunks as $i => $chunk) { | |
| 816 | - //error_log('[MXCHAT-CHUNK-DEBUG] Chunk ' . $i . ' length: ' . strlen($chunk) . ' chars, preview: ' . substr($chunk, 0, 100)); | |
| 817 | - } | |
| 818 | - | |
| 819 | - //error_log('[MXCHAT-CHUNK] Split content into ' . $total_chunks . ' chunks'); | |
| 820 | - | |
| 821 | - if ($total_chunks === 0) { | |
| 822 | - return new WP_Error('chunking_failed', 'Content could not be split into chunks'); | |
| 823 | - } | |
| 824 | - | |
| 825 | - $errors = array(); | |
| 826 | - $embed_failures = 0; | |
| 827 | - $first_embed_reason = ''; | |
| 828 | - $first_store_reason = ''; | |
| 829 | - $is_pinecone = self::is_pinecone_enabled_for_bot($bot_id); | |
| 830 | - | |
| 831 | - foreach ($chunks as $index => $chunk_text) { | |
| 832 | - // Generate chunk metadata | |
| 833 | - $chunk_metadata = MxChat_Chunker::create_chunk_metadata($index, $total_chunks, $source_url); | |
| 834 | - | |
| 835 | - // AI-Engine-style aliases so external consumers (Pinecone/Qdrant/Chroma) can rely on | |
| 836 | - // a stable shorthand ('source'/'part_index'/'part_total') without parsing our internal names. | |
| 837 | - $chunk_metadata['source'] = $source_url; | |
| 838 | - $chunk_metadata['part_index'] = (int) $index; | |
| 839 | - $chunk_metadata['part_total'] = (int) $total_chunks; | |
| 840 | - | |
| 841 | - /** | |
| 842 | - * Filter the per-chunk metadata blob before it's written to the KB store. | |
| 843 | - * | |
| 844 | - * @param array $chunk_metadata Metadata array (source, part_index, part_total, chunk_index, total_chunks, source_url, parent_url_hash, document_type, ...). | |
| 845 | - * @param string $chunk_text The chunk text being stored. | |
| 846 | - * @param array $context ['bot_id' => string, 'content_type' => string, 'source_url' => string, 'part_index' => int, 'part_total' => int] | |
| 847 | - * @return array Updated metadata array. | |
| 848 | - */ | |
| 849 | - $chunk_metadata = apply_filters( | |
| 850 | - 'mxchat_embedding_chunk_metadata', | |
| 851 | - $chunk_metadata, | |
| 852 | - $chunk_text, | |
| 853 | - array( | |
| 854 | - 'bot_id' => $bot_id, | |
| 855 | - 'content_type' => $content_type, | |
| 856 | - 'source_url' => $source_url, | |
| 857 | - 'part_index' => (int) $index, | |
| 858 | - 'part_total' => (int) $total_chunks, | |
| 859 | - ) | |
| 860 | - ); | |
| 861 | - | |
| 862 | - $chunk_vector_id = MxChat_Chunker::generate_chunk_vector_id($source_url, $index); | |
| 863 | - | |
| 864 | - //error_log('[MXCHAT-CHUNK] Processing chunk ' . ($index + 1) . '/' . $total_chunks . ' (ID: ' . $chunk_vector_id . ')'); | |
| 865 | - | |
| 866 | - // Generate embedding for this chunk | |
| 867 | - $embedding_vector = self::generate_embedding($chunk_text, $api_key, $bot_id); | |
| 868 | - | |
| 869 | - if (!is_array($embedding_vector)) { | |
| 870 | - // Track embedding failures separately from storage failures, and | |
| 871 | - // keep the first provider reason seen — the two failure classes | |
| 872 | - // have opposite remedies (API key vs Pinecone/DB) (plan 4a7c0a). | |
| 873 | - $embed_failures++; | |
| 874 | - $reason = is_wp_error($embedding_vector) ? $embedding_vector->get_error_message() : ''; | |
| 875 | - if ($reason !== '' && $first_embed_reason === '') { | |
| 876 | - $first_embed_reason = $reason; | |
| 877 | - } | |
| 878 | - $errors[] = new WP_Error('embedding_failed', 'Failed to generate embedding for chunk ' . $index . ($reason !== '' ? ' — ' . $reason : '')); | |
| 879 | - continue; | |
| 880 | - } | |
| 881 | - | |
| 882 | - if ($is_pinecone) { | |
| 883 | - // Store in Pinecone with chunk metadata | |
| 884 | - $result = self::store_chunk_in_pinecone( | |
| 885 | - $embedding_vector, | |
| 886 | - $chunk_text, | |
| 887 | - $source_url, | |
| 888 | - $chunk_vector_id, | |
| 889 | - $bot_id, | |
| 890 | - $content_type, | |
| 891 | - $chunk_metadata | |
| 892 | - ); | |
| 893 | - } else { | |
| 894 | - // Store in WordPress DB with chunk metadata | |
| 895 | - $content_with_metadata = MxChat_Chunker::format_chunk_for_storage($chunk_text, $chunk_metadata); | |
| 896 | - $embedding_vector_serialized = maybe_serialize($embedding_vector); | |
| 897 | - | |
| 898 | - $result = self::store_chunk_in_wordpress_db( | |
| 899 | - $content_with_metadata, | |
| 900 | - $source_url, | |
| 901 | - $embedding_vector_serialized, | |
| 902 | - $table_name, | |
| 903 | - $content_type, | |
| 904 | - $chunk_metadata | |
| 905 | - ); | |
| 906 | - } | |
| 907 | - | |
| 908 | - if (is_wp_error($result)) { | |
| 909 | - $errors[] = $result; | |
| 910 | - if ($first_store_reason === '') { | |
| 911 | - $first_store_reason = $result->get_error_message(); | |
| 912 | - } | |
| 913 | - } | |
| 914 | - } | |
| 915 | - | |
| 916 | - if (count($errors) === $total_chunks) { | |
| 917 | - // Say WHICH stage failed — "failed to store" used to cover pure | |
| 918 | - // embedding failures too, sending customers to debug Pinecone when | |
| 919 | - // the problem was their embedding API key (plan 4a7c0a). | |
| 920 | - if ($embed_failures === $total_chunks) { | |
| 921 | - return new WP_Error('chunking_failed', | |
| 922 | - 'Failed to store any chunks — every chunk failed to embed' | |
| 923 | - . ($first_embed_reason !== '' ? ': ' . $first_embed_reason : '') | |
| 924 | - . ' Check the embedding provider API key and model under MxChat Settings.'); | |
| 925 | - } | |
| 926 | - if ($embed_failures === 0) { | |
| 927 | - return new WP_Error('chunking_failed', | |
| 928 | - 'Failed to store any chunks — embeddings generated but storage failed' | |
| 929 | - . ($first_store_reason !== '' ? ': ' . $first_store_reason : '') | |
| 930 | - . ' Check the knowledge base storage (Pinecone index or database).'); | |
| 931 | - } | |
| 932 | - return new WP_Error('chunking_failed', sprintf( | |
| 933 | - 'Failed to store any chunks — %d failed to embed%s and %d failed to store%s', | |
| 934 | - $embed_failures, | |
| 935 | - $first_embed_reason !== '' ? ' (' . $first_embed_reason . ')' : '', | |
| 936 | - $total_chunks - $embed_failures, | |
| 937 | - $first_store_reason !== '' ? ' (' . $first_store_reason . ')' : '' | |
| 938 | - )); | |
| 939 | - } | |
| 940 | - | |
| 941 | - if (!empty($errors)) { | |
| 942 | - $detail = $first_embed_reason !== '' ? $first_embed_reason : $first_store_reason; | |
| 943 | - return new WP_Error('chunking_partial_failure', | |
| 944 | - sprintf('Failed to store %d of %d chunks', count($errors), $total_chunks) | |
| 945 | - . ($detail !== '' ? ' — first error: ' . $detail : '')); | |
| 946 | - } | |
| 947 | - | |
| 948 | - //error_log('[MXCHAT-CHUNK] Successfully stored all ' . $total_chunks . ' chunks'); | |
| 949 | - return true; | |
| 950 | -} | |
| 951 | - | |
| 952 | -/** | |
| 953 | - * Store a single chunk in Pinecone with chunk-specific metadata | |
| 954 | - */ | |
| 955 | -private static function store_chunk_in_pinecone($embedding_vector, $chunk_text, $source_url, $vector_id, $bot_id, $content_type, $chunk_metadata) { | |
| 956 | - // Get Pinecone configuration | |
| 957 | - if ($bot_id === 'default' || !class_exists('MxChat_Multi_Bot_Manager')) { | |
| 958 | - $pinecone_options = get_option('mxchat_pinecone_addon_options'); | |
| 959 | - $api_key = $pinecone_options['mxchat_pinecone_api_key'] ?? ''; | |
| 960 | - $host = $pinecone_options['mxchat_pinecone_host'] ?? ''; | |
| 961 | - $namespace = $pinecone_options['mxchat_pinecone_namespace'] ?? ''; | |
| 962 | - } else { | |
| 963 | - $bot_pinecone_config = apply_filters('mxchat_get_bot_pinecone_config', array(), $bot_id); | |
| 964 | - if (empty($bot_pinecone_config)) { | |
| 965 | - $pinecone_options = get_option('mxchat_pinecone_addon_options'); | |
| 966 | - $api_key = $pinecone_options['mxchat_pinecone_api_key'] ?? ''; | |
| 967 | - $host = $pinecone_options['mxchat_pinecone_host'] ?? ''; | |
| 968 | - $namespace = $pinecone_options['mxchat_pinecone_namespace'] ?? ''; | |
| 969 | - } else { | |
| 970 | - $api_key = $bot_pinecone_config['api_key'] ?? ''; | |
| 971 | - $host = $bot_pinecone_config['host'] ?? ''; | |
| 972 | - $namespace = $bot_pinecone_config['namespace'] ?? ''; | |
| 973 | - } | |
| 974 | - } | |
| 975 | - | |
| 976 | - if (empty($host) || empty($api_key)) { | |
| 977 | - return new WP_Error('pinecone_config', 'Pinecone is not properly configured'); | |
| 978 | - } | |
| 979 | - | |
| 980 | - $api_endpoint = "https://{$host}/vectors/upsert"; | |
| 981 | - | |
| 982 | - // Build metadata with chunk information | |
| 983 | - $metadata = array( | |
| 984 | - 'text' => $chunk_text, | |
| 985 | - 'source_url' => $source_url, | |
| 986 | - 'type' => $content_type, | |
| 987 | - 'is_chunked' => true, | |
| 988 | - 'chunk_index' => $chunk_metadata['chunk_index'], | |
| 989 | - 'total_chunks' => $chunk_metadata['total_chunks'], | |
| 990 | - 'parent_url_hash' => $chunk_metadata['parent_url_hash'], | |
| 991 | - 'last_updated' => time(), | |
| 992 | - 'created_at' => time(), | |
| 993 | - 'bot_id' => $bot_id, | |
| 994 | - ); | |
| 995 | - | |
| 996 | - $vector_data = array( | |
| 997 | - 'id' => $vector_id, | |
| 998 | - 'values' => $embedding_vector, | |
| 999 | - 'metadata' => $metadata | |
| 1000 | - ); | |
| 1001 | - | |
| 1002 | - $request_body = array( | |
| 1003 | - 'vectors' => array($vector_data) | |
| 1004 | - ); | |
| 1005 | - | |
| 1006 | - if (!empty($namespace)) { | |
| 1007 | - $request_body['namespace'] = $namespace; | |
| 1008 | - } | |
| 1009 | - | |
| 1010 | - $response = wp_remote_post($api_endpoint, array( | |
| 1011 | - 'headers' => array( | |
| 1012 | - 'Api-Key' => $api_key, | |
| 1013 | - 'accept' => 'application/json', | |
| 1014 | - 'content-type' => 'application/json' | |
| 1015 | - ), | |
| 1016 | - 'body' => wp_json_encode($request_body), | |
| 1017 | - 'timeout' => 30 | |
| 1018 | - )); | |
| 1019 | - | |
| 1020 | - if (is_wp_error($response)) { | |
| 1021 | - return $response; | |
| 1022 | - } | |
| 1023 | - | |
| 1024 | - $response_code = wp_remote_retrieve_response_code($response); | |
| 1025 | - if ($response_code !== 200) { | |
| 1026 | - return new WP_Error('pinecone_api', 'Pinecone API error: HTTP ' . $response_code); | |
| 1027 | - } | |
| 1028 | - | |
| 1029 | - return true; | |
| 1030 | -} | |
| 1031 | - | |
| 1032 | -/** | |
| 1033 | - * Store a single chunk in WordPress database | |
| 1034 | - */ | |
| 1035 | -private static function store_chunk_in_wordpress_db($content_with_metadata, $source_url, $embedding_vector_serialized, $table_name, $content_type, $chunk_metadata) { | |
| 1036 | - global $wpdb; | |
| 1037 | - | |
| 1038 | - // For chunks, we always insert new rows (no duplicate checking) | |
| 1039 | - // The URL includes chunk info in the metadata, but source_url stays the same for grouping | |
| 1040 | - $result = $wpdb->insert( | |
| 1041 | - $table_name, | |
| 1042 | - array( | |
| 1043 | - 'url' => $source_url, | |
| 1044 | - 'article_content' => $content_with_metadata, | |
| 1045 | - 'embedding_vector' => $embedding_vector_serialized, | |
| 1046 | - 'source_url' => $source_url, | |
| 1047 | - 'content_type' => $content_type, | |
| 1048 | - 'timestamp' => current_time('mysql') | |
| 1049 | - ), | |
| 1050 | - array('%s', '%s', '%s', '%s', '%s', '%s') | |
| 1051 | - ); | |
| 1052 | - | |
| 1053 | - if ($result === false) { | |
| 1054 | - return new WP_Error('database_failed', 'Failed to insert chunk: ' . $wpdb->last_error); | |
| 1055 | - } | |
| 1056 | - | |
| 1057 | - return true; | |
| 1058 | -} | |
| 1059 | - | |
| 1060 | -/** | |
| 1061 | - * Delete all chunks for a given URL | |
| 1062 | - * | |
| 1063 | - * @param string $source_url The source URL | |
| 1064 | - * @param string $bot_id The bot ID | |
| 1065 | - * @return bool|WP_Error True on success, WP_Error on failure | |
| 1066 | - */ | |
| 1067 | -public static function delete_chunks_for_url($source_url, $bot_id = 'default') { | |
| 1068 | - //error_log('[MXCHAT-CHUNK-DELETE] Deleting chunks for URL: ' . $source_url); | |
| 1069 | - | |
| 1070 | - if (self::is_pinecone_enabled_for_bot($bot_id)) { | |
| 1071 | - return self::delete_pinecone_chunks_by_url($source_url, $bot_id); | |
| 1072 | - } else { | |
| 1073 | - return self::delete_wordpress_chunks_by_url($source_url); | |
| 1074 | - } | |
| 1075 | -} | |
| 1076 | - | |
| 1077 | -/** | |
| 1078 | - * Delete all chunks for a URL from Pinecone | |
| 1079 | - */ | |
| 1080 | -private static function delete_pinecone_chunks_by_url($source_url, $bot_id) { | |
| 1081 | - // Get Pinecone configuration | |
| 1082 | - if ($bot_id === 'default' || !class_exists('MxChat_Multi_Bot_Manager')) { | |
| 1083 | - $pinecone_options = get_option('mxchat_pinecone_addon_options'); | |
| 1084 | - $api_key = $pinecone_options['mxchat_pinecone_api_key'] ?? ''; | |
| 1085 | - $host = $pinecone_options['mxchat_pinecone_host'] ?? ''; | |
| 1086 | - $namespace = $pinecone_options['mxchat_pinecone_namespace'] ?? ''; | |
| 1087 | - } else { | |
| 1088 | - $bot_pinecone_config = apply_filters('mxchat_get_bot_pinecone_config', array(), $bot_id); | |
| 1089 | - if (empty($bot_pinecone_config)) { | |
| 1090 | - $pinecone_options = get_option('mxchat_pinecone_addon_options'); | |
| 1091 | - $api_key = $pinecone_options['mxchat_pinecone_api_key'] ?? ''; | |
| 1092 | - $host = $pinecone_options['mxchat_pinecone_host'] ?? ''; | |
| 1093 | - $namespace = $pinecone_options['mxchat_pinecone_namespace'] ?? ''; | |
| 1094 | - } else { | |
| 1095 | - $api_key = $bot_pinecone_config['api_key'] ?? ''; | |
| 1096 | - $host = $bot_pinecone_config['host'] ?? ''; | |
| 1097 | - $namespace = $bot_pinecone_config['namespace'] ?? ''; | |
| 1098 | - } | |
| 1099 | - } | |
| 1100 | - | |
| 1101 | - if (empty($host) || empty($api_key)) { | |
| 1102 | - return new WP_Error('pinecone_config', 'Pinecone is not properly configured'); | |
| 1103 | - } | |
| 1104 | - | |
| 1105 | - $base_vector_id = md5($source_url); | |
| 1106 | - $vectors_to_delete = array(); | |
| 1107 | - | |
| 1108 | - // Add the original single-vector ID (for non-chunked content) | |
| 1109 | - $vectors_to_delete[] = $base_vector_id; | |
| 1110 | - | |
| 1111 | - // Pinecone /vectors/list is a GET endpoint with query-string parameters; a POST here returns a | |
| 1112 | - // non-200 silently and we end up only deleting the base vector, leaving chunks orphaned. | |
| 1113 | - $query_params = array( | |
| 1114 | - 'prefix' => $base_vector_id . '_chunk_', | |
| 1115 | - 'limit' => 100, | |
| 1116 | - ); | |
| 1117 | - if (!empty($namespace)) { | |
| 1118 | - $query_params['namespace'] = $namespace; | |
| 1119 | - } | |
| 1120 | - | |
| 1121 | - $list_url = "https://{$host}/vectors/list?" . http_build_query($query_params); | |
| 1122 | - | |
| 1123 | - // Paginate in case a URL has more than 100 chunks. | |
| 1124 | - do { | |
| 1125 | - $list_response = wp_remote_get($list_url, array( | |
| 1126 | - 'headers' => array( | |
| 1127 | - 'Api-Key' => $api_key, | |
| 1128 | - 'accept' => 'application/json', | |
| 1129 | - ), | |
| 1130 | - 'timeout' => 30, | |
| 1131 | - )); | |
| 1132 | - | |
| 1133 | - if (is_wp_error($list_response) || wp_remote_retrieve_response_code($list_response) !== 200) { | |
| 1134 | - break; | |
| 1135 | - } | |
| 1136 | - | |
| 1137 | - $list_data = json_decode(wp_remote_retrieve_body($list_response), true); | |
| 1138 | - if (!empty($list_data['vectors'])) { | |
| 1139 | - foreach ($list_data['vectors'] as $vector) { | |
| 1140 | - if (isset($vector['id'])) { | |
| 1141 | - $vectors_to_delete[] = $vector['id']; | |
| 1142 | - } | |
| 1143 | - } | |
| 1144 | - } | |
| 1145 | - | |
| 1146 | - $next_token = $list_data['pagination']['next'] ?? ''; | |
| 1147 | - if (empty($next_token)) { | |
| 1148 | - break; | |
| 1149 | - } | |
| 1150 | - | |
| 1151 | - $query_params['paginationToken'] = $next_token; | |
| 1152 | - $list_url = "https://{$host}/vectors/list?" . http_build_query($query_params); | |
| 1153 | - } while (true); | |
| 1154 | - | |
| 1155 | - if (empty($vectors_to_delete)) { | |
| 1156 | - //error_log('[MXCHAT-CHUNK-DELETE] No vectors found to delete'); | |
| 1157 | - return true; | |
| 1158 | - } | |
| 1159 | - | |
| 1160 | - //error_log('[MXCHAT-CHUNK-DELETE] Deleting ' . count($vectors_to_delete) . ' vectors from Pinecone'); | |
| 1161 | - | |
| 1162 | - // Delete vectors | |
| 1163 | - $delete_url = "https://{$host}/vectors/delete"; | |
| 1164 | - | |
| 1165 | - $delete_body = array( | |
| 1166 | - 'ids' => $vectors_to_delete | |
| 1167 | - ); | |
| 1168 | - | |
| 1169 | - if (!empty($namespace)) { | |
| 1170 | - $delete_body['namespace'] = $namespace; | |
| 1171 | - } | |
| 1172 | - | |
| 1173 | - $delete_response = wp_remote_post($delete_url, array( | |
| 1174 | - 'headers' => array( | |
| 1175 | - 'Api-Key' => $api_key, | |
| 1176 | - 'accept' => 'application/json', | |
| 1177 | - 'content-type' => 'application/json' | |
| 1178 | - ), | |
| 1179 | - 'body' => wp_json_encode($delete_body), | |
| 1180 | - 'timeout' => 30 | |
| 1181 | - )); | |
| 1182 | - | |
| 1183 | - if (is_wp_error($delete_response)) { | |
| 1184 | - return $delete_response; | |
| 1185 | - } | |
| 1186 | - | |
| 1187 | - $response_code = wp_remote_retrieve_response_code($delete_response); | |
| 1188 | - if ($response_code !== 200) { | |
| 1189 | - return new WP_Error('pinecone_delete', 'Failed to delete vectors: HTTP ' . $response_code); | |
| 1190 | - } | |
| 1191 | - | |
| 1192 | - return true; | |
| 1193 | -} | |
| 1194 | - | |
| 1195 | -/** | |
| 1196 | - * Delete all chunks for a URL from WordPress database | |
| 1197 | - */ | |
| 1198 | -private static function delete_wordpress_chunks_by_url($source_url) { | |
| 1199 | - global $wpdb; | |
| 1200 | - $table_name = $wpdb->prefix . 'mxchat_system_prompt_content'; | |
| 1201 | - | |
| 1202 | - // Delete all rows with this source_url (handles both chunked and non-chunked) | |
| 1203 | - $result = $wpdb->delete( | |
| 1204 | - $table_name, | |
| 1205 | - array('source_url' => $source_url), | |
| 1206 | - array('%s') | |
| 1207 | - ); | |
| 1208 | - | |
| 1209 | - if ($result === false) { | |
| 1210 | - return new WP_Error('database_delete', 'Failed to delete chunks: ' . $wpdb->last_error); | |
| 1211 | - } | |
| 1212 | - | |
| 1213 | - //error_log('[MXCHAT-CHUNK-DELETE] Deleted ' . $result . ' rows from WordPress DB'); | |
| 1214 | - return true; | |
| 1215 | -} | |
| 1216 | - | |
| 1217 | -/** | |
| 1218 | - * Hybrid keyword boost (plan-38ffa1): detect whether the WP-DB knowledge | |
| 1219 | - * table can serve the keyword leg via a MySQL FULLTEXT index, creating the | |
| 1220 | - * index if needed. Detection runs once and caches the answer in the | |
| 1221 | - * mxchat_hybrid_keyword_capability option ('fulltext' | 'like'); pass | |
| 1222 | - * $force to re-detect. LIKE is the graceful fallback for shared hosts | |
| 1223 | - * whose ALTER fails — the feature works either way, FULLTEXT just ranks | |
| 1224 | - * better and scales. | |
| 1225 | - * | |
| 1226 | - * @param bool $force Re-run detection even if a cached answer exists. | |
| 1227 | - * @return string 'fulltext' or 'like' | |
| 1228 | - */ | |
| 1229 | -public static function mxchat_hybrid_detect_capability($force = false) { | |
| 1230 | - $cached = get_option('mxchat_hybrid_keyword_capability', ''); | |
| 1231 | - if (!$force && in_array($cached, array('fulltext', 'like'), true)) { | |
| 1232 | - return $cached; | |
| 1233 | - } | |
| 1234 | - | |
| 1235 | - global $wpdb; | |
| 1236 | - $table = $wpdb->prefix . 'mxchat_system_prompt_content'; | |
| 1237 | - | |
| 1238 | - $index_exists = $wpdb->get_var("SHOW INDEX FROM {$table} WHERE Key_name = 'mxchat_content_ft'"); | |
| 1239 | - if (!$index_exists) { | |
| 1240 | - // Suppress the visible error on hosts where this is not permitted — | |
| 1241 | - // failure is an expected, handled outcome (LIKE fallback). | |
| 1242 | - $suppress = $wpdb->suppress_errors(true); | |
| 1243 | - $wpdb->query("ALTER TABLE {$table} ADD FULLTEXT INDEX mxchat_content_ft (article_content)"); | |
| 1244 | - $wpdb->suppress_errors($suppress); | |
| 1245 | - $index_exists = $wpdb->get_var("SHOW INDEX FROM {$table} WHERE Key_name = 'mxchat_content_ft'"); | |
| 1246 | - } | |
| 1247 | - | |
| 1248 | - $capability = $index_exists ? 'fulltext' : 'like'; | |
| 1249 | - update_option('mxchat_hybrid_keyword_capability', $capability); | |
| 1250 | - return $capability; | |
| 1251 | -} | |
| 1252 | -} | |
| 1 | +<?php | |
| 2 | +if (!defined('ABSPATH')) { | |
| 3 | + exit; // Exit if accessed directly | |
| 4 | +} | |
| 5 | + | |
| 6 | +class MxChat_Utils { | |
| 7 | + | |
| 8 | + /** | |
| 9 | + * Submit content and its embedding to the database. | |
| 10 | + * | |
| 11 | + * @param string $content The content to be embedded. | |
| 12 | + * @param string $source_url The source URL of the content. | |
| 13 | + * @param string $api_key The API key used for generating embeddings. | |
| 14 | + */ | |
| 15 | + public static function submit_content_to_db($content, $source_url, $api_key) { | |
| 16 | + global $wpdb; | |
| 17 | + $table_name = $wpdb->prefix . 'mxchat_system_prompt_content'; | |
| 18 | + | |
| 19 | + // Sanitize the source URL | |
| 20 | + $source_url = esc_url_raw($source_url); | |
| 21 | + | |
| 22 | + // Generate the embedding using the API key | |
| 23 | + $embedding_vector = self::generate_embedding($content, $api_key); | |
| 24 | + | |
| 25 | + if (is_array($embedding_vector)) { | |
| 26 | + $embedding_vector_serialized = serialize($embedding_vector); | |
| 27 | + | |
| 28 | + // Insert or update the record in the database | |
| 29 | + $wpdb->replace( | |
| 30 | + $table_name, | |
| 31 | + array( | |
| 32 | + 'article_content' => $content, | |
| 33 | + 'embedding_vector' => $embedding_vector_serialized, | |
| 34 | + 'source_url' => $source_url, | |
| 35 | + ), | |
| 36 | + array( | |
| 37 | + '%s', | |
| 38 | + '%s', | |
| 39 | + '%s', | |
| 40 | + ) | |
| 41 | + ); | |
| 42 | + } else { | |
| 43 | + //error_log('Embedding generation failed for content from ' . $source_url); | |
| 44 | + } | |
| 45 | + } | |
| 46 | + | |
| 47 | + /** | |
| 48 | + * Generate an embedding for the given text. | |
| 49 | + * | |
| 50 | + * @param string $text The text to be embedded. | |
| 51 | + * @param string $api_key The API key used for generating embeddings. | |
| 52 | + * @return array|null The embedding vector or null on failure. | |
| 53 | + */ | |
| 54 | + private static function generate_embedding($text, $api_key) { | |
| 55 | + $endpoint = 'https://api.openai.com/v1/embeddings'; | |
| 56 | + | |
| 57 | + $body = wp_json_encode([ | |
| 58 | + 'input' => $text, | |
| 59 | + 'model' => 'text-embedding-ada-002' | |
| 60 | + ]); | |
| 61 | + | |
| 62 | + $args = [ | |
| 63 | + 'body' => $body, | |
| 64 | + 'headers' => [ | |
| 65 | + 'Content-Type' => 'application/json', | |
| 66 | + 'Authorization' => 'Bearer ' . $api_key, | |
| 67 | + ], | |
| 68 | + 'timeout' => 60, | |
| 69 | + 'redirection' => 5, | |
| 70 | + 'blocking' => true, | |
| 71 | + 'httpversion' => '1.0', | |
| 72 | + 'sslverify' => true, | |
| 73 | + ]; | |
| 74 | + | |
| 75 | + $response = wp_remote_post($endpoint, $args); | |
| 76 | + | |
| 77 | + if (is_wp_error($response)) { | |
| 78 | + //error_log('Error generating embedding: ' . $response->get_error_message()); | |
| 79 | + return null; | |
| 80 | + } | |
| 81 | + | |
| 82 | + $response_body = json_decode(wp_remote_retrieve_body($response), true); | |
| 83 | + | |
| 84 | + if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) { | |
| 85 | + return $response_body['data'][0]['embedding']; | |
| 86 | + } else { | |
| 87 | + //error_log('Invalid response received from embedding API.'); | |
| 88 | + return null; | |
| 89 | + } | |
| 90 | + } | |
| 91 | +} | |
| 92 | + | |
| 93 | +?> | |
