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<?php |
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if (!defined('ABSPATH')) { |
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exit; // Exit if accessed directly |
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} |
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|
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class MxChat_Utils { |
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|
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/** |
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* Submit or update content (and its embedding) in the database. |
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* Stores in Pinecone if enabled, otherwise stores in WordPress DB. |
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* |
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* @param string $content The content to be embedded. |
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* @param string $source_url The source URL of the content. |
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* @param string $api_key The API key used for generating embeddings. |
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* @param string $vector_id Optional vector ID for Pinecone (if not provided, will use md5 of URL) |
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* @return bool|WP_Error True on success, WP_Error on failure |
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*/ |
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public static function submit_content_to_db($content, $source_url, $api_key, $vector_id = null) { |
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global $wpdb; |
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$table_name = $wpdb->prefix . 'mxchat_system_prompt_content'; |
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|
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error_log('[MXCHAT-DB] Starting database submission for URL: ' . $source_url); |
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error_log('[MXCHAT-DB] Content length: ' . strlen($content) . ' bytes'); |
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|
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// Sanitize the source URL |
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$source_url = esc_url_raw($source_url); |
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|
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// Just ensure UTF-8 validity without aggressive escaping |
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$safe_content = wp_check_invalid_utf8($content); |
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// Remove only null bytes and other control characters, but preserve newlines (\n = \x0A) and carriage returns (\r = \x0D) |
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$safe_content = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]/u', '', $safe_content); |
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|
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|
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// Generate the embedding using the API key |
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$embedding_vector = self::generate_embedding($content, $api_key); |
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|
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if (!is_array($embedding_vector)) { |
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error_log('[MXCHAT-DB] Error: Embedding generation failed'); |
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return new WP_Error('embedding_failed', 'Failed to generate embedding for content'); |
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} |
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|
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error_log('[MXCHAT-DB] Embedding generated successfully'); |
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|
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// Check if Pinecone is enabled and configured |
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if (self::is_pinecone_enabled()) { |
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error_log('[MXCHAT-DB] Pinecone is enabled - using Pinecone storage'); |
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// Store in Pinecone only |
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return self::store_in_pinecone_only($embedding_vector, $content, $source_url, $vector_id); |
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} else { |
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error_log('[MXCHAT-DB] Pinecone not enabled - using WordPress storage'); |
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// Store in WordPress database only |
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$embedding_vector_serialized = maybe_serialize($embedding_vector); |
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return self::store_in_wordpress_db($safe_content, $source_url, $embedding_vector_serialized, $table_name); |
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} |
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} |
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|
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/** |
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* Check if Pinecone is enabled and properly configured |
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*/ |
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private static function is_pinecone_enabled() { |
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$pinecone_options = get_option('mxchat_pinecone_addon_options'); |
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|
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if (empty($pinecone_options)) { |
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return false; |
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} |
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|
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$enabled_check = !empty($pinecone_options['mxchat_use_pinecone']) && $pinecone_options['mxchat_use_pinecone'] !== '0'; |
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$api_key_check = !empty($pinecone_options['mxchat_pinecone_api_key']); |
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$host_check = !empty($pinecone_options['mxchat_pinecone_host']); |
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|
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return $enabled_check && $api_key_check && $host_check; |
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} |
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|
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/** |
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* Store content in Pinecone only |
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*/ |
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private static function store_in_pinecone_only($embedding_vector, $content, $source_url, $vector_id = null) { |
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error_log('[MXCHAT-PINECONE] ===== Using Pinecone-only storage ====='); |
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|
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$pinecone_options = get_option('mxchat_pinecone_addon_options'); |
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|
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$result = self::store_in_pinecone_main( |
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$embedding_vector, |
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$content, |
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$source_url, |
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$pinecone_options['mxchat_pinecone_api_key'], |
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$pinecone_options['mxchat_pinecone_environment'] ?? '', |
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$pinecone_options['mxchat_pinecone_index'] ?? '', |
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$vector_id |
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); |
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|
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if (is_wp_error($result)) { |
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error_log('[MXCHAT-PINECONE] Pinecone storage failed: ' . $result->get_error_message()); |
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return $result; |
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} |
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|
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error_log('[MXCHAT-PINECONE] Pinecone storage completed successfully'); |
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return true; |
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} |
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|
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/** |
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* Store content in WordPress database with progressive fallback |
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*/ |
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private static function store_in_wordpress_db($safe_content, $source_url, $embedding_vector_serialized, $table_name) { |
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global $wpdb; |
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|
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error_log('[MXCHAT-DB] ===== Using WordPress-only storage ====='); |
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|
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// Check if a row already exists for this URL |
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$existing_id = $wpdb->get_var( |
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$wpdb->prepare( |
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"SELECT id FROM {$table_name} WHERE source_url = %s LIMIT 1", |
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$source_url |
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) |
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); |
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|
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// Progressive fallback mechanism for problematic content |
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$attempt = 1; |
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$max_attempts = 3; |
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$current_content = $safe_content; |
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$result = false; |
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|
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while ($attempt <= $max_attempts && $result === false) { |
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try { |
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if ($existing_id) { |
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error_log('[MXCHAT-DB] Found existing entry (ID: ' . $existing_id . '). Updating... (Attempt ' . $attempt . ')'); |
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|
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// Update the existing row |
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$result = $wpdb->update( |
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$table_name, |
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array( |
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'url' => $source_url, |
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'article_content' => $current_content, |
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'embedding_vector' => $embedding_vector_serialized, |
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'source_url' => $source_url, |
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'timestamp' => current_time('mysql'), |
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), |
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array('id' => $existing_id), |
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array('%s','%s','%s','%s','%s'), |
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array('%d') |
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); |
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} else { |
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error_log('[MXCHAT-DB] No existing entry found. Inserting new row... (Attempt ' . $attempt . ')'); |
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error_log('[MXCHAT-DB] Content sample: ' . substr($current_content, 0, 1000)); |
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|
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// Insert a new row |
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$result = $wpdb->insert( |
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$table_name, |
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array( |
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'url' => $source_url, |
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'article_content' => $current_content, |
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'embedding_vector' => $embedding_vector_serialized, |
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'source_url' => $source_url, |
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'timestamp' => current_time('mysql'), |
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), |
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array('%s','%s','%s','%s','%s') |
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); |
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} |
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|
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if ($result === false) { |
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error_log('[MXCHAT-DB] Database operation failed (Attempt ' . $attempt . '): ' . $wpdb->last_error); |
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|
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// Progressively apply more aggressive sanitization on failure |
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if ($attempt === 1) { |
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// First fallback: Use a more aggressive character filter and shorten |
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$current_content = preg_replace('/[^\p{L}\p{N}\s.,;:!?()-]/u', '', $current_content); |
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$current_content = substr($current_content, 0, 50000); |
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} else if ($attempt === 2) { |
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// Second fallback: Keep only alphanumeric and basic punctuation, shorten further |
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$current_content = preg_replace('/[^a-zA-Z0-9\s.,;:!?()-]/u', '', $current_content); |
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$current_content = substr($current_content, 0, 30000); |
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} |
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|
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$attempt++; |
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} |
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} catch (Exception $e) { |
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error_log('[MXCHAT-DB] Exception during database operation: ' . $e->getMessage()); |
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$attempt++; |
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} |
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} |
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|
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if ($result === false) { |
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error_log('[MXCHAT-DB] All database operation attempts failed'); |
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return new WP_Error('database_failed', 'Failed to store content in WordPress database after ' . $max_attempts . ' attempts'); |
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} |
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|
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error_log('[MXCHAT-DB] WordPress database operation completed successfully (Attempt ' . ($attempt - 1) . ')'); |
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return true; |
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} |
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|
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/** |
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* Store content in Pinecone database |
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*/ |
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private static function store_in_pinecone_main($embedding_vector, $content, $url, $api_key, $environment, $index_name, $vector_id = null) { |
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error_log('[MXCHAT-PINECONE-MAIN] ===== Starting Pinecone storage ====='); |
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|
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$vector_id = $vector_id ?: md5($url); |
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error_log('[MXCHAT-PINECONE-MAIN] Vector ID: ' . $vector_id); |
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|
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$options = get_option('mxchat_pinecone_addon_options'); |
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$host = $options['mxchat_pinecone_host'] ?? ''; |
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|
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error_log('[MXCHAT-PINECONE-MAIN] Host from options: ' . $host); |
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error_log('[MXCHAT-PINECONE-MAIN] API key length: ' . strlen($api_key)); |
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error_log('[MXCHAT-PINECONE-MAIN] Environment: ' . $environment); |
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error_log('[MXCHAT-PINECONE-MAIN] Index name: ' . $index_name); |
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|
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if (empty($host)) { |
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error_log('[MXCHAT-PINECONE-MAIN] ERROR: Host is empty'); |
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return new WP_Error('pinecone_config', 'Pinecone host is not configured. Please set the host in your settings.'); |
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} |
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|
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// Determine if this is a product URL |
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$is_product = (strpos($url, '/product/') !== false || strpos($url, '/shop/') !== false); |
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error_log('[MXCHAT-PINECONE-MAIN] Is product URL: ' . ($is_product ? 'YES' : 'NO')); |
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|
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$api_endpoint = "https://{$host}/vectors/upsert"; |
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error_log('[MXCHAT-PINECONE-MAIN] API endpoint: ' . $api_endpoint); |
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|
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$request_body = array( |
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'vectors' => array( |
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array( |
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'id' => $vector_id, |
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'values' => $embedding_vector, |
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'metadata' => array( |
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'text' => $content, |
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'source_url' => $url, |
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'type' => $is_product ? 'product' : 'content', |
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'last_updated' => time() |
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) |
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) |
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) |
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); |
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|
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error_log('[MXCHAT-PINECONE-MAIN] Request body prepared (embedding dimensions: ' . count($embedding_vector) . ')'); |
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|
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$response = wp_remote_post($api_endpoint, array( |
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'headers' => array( |
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'Api-Key' => $api_key, |
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'accept' => 'application/json', |
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'content-type' => 'application/json' |
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), |
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'body' => wp_json_encode($request_body), |
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'timeout' => 30, |
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'data_format' => 'body' |
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)); |
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|
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if (is_wp_error($response)) { |
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error_log('[MXCHAT-PINECONE-MAIN] WordPress request error: ' . $response->get_error_message()); |
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return new WP_Error('pinecone_request', $response->get_error_message()); |
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} |
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|
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$response_code = wp_remote_retrieve_response_code($response); |
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error_log('[MXCHAT-PINECONE-MAIN] Response code: ' . $response_code); |
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|
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if ($response_code !== 200) { |
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$body = wp_remote_retrieve_body($response); |
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error_log('[MXCHAT-PINECONE-MAIN] API error - Response body: ' . $body); |
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return new WP_Error('pinecone_api', sprintf( |
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'Pinecone API error (HTTP %d): %s', |
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$response_code, |
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$body |
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)); |
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} |
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|
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$response_body = wp_remote_retrieve_body($response); |
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error_log('[MXCHAT-PINECONE-MAIN] Success response: ' . $response_body); |
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error_log('[MXCHAT-PINECONE-MAIN] Successfully stored in Pinecone'); |
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error_log('[MXCHAT-PINECONE-MAIN] ===== Pinecone storage complete ====='); |
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|
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return true; |
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} |
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|
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/** |
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* Generate an embedding for the given text using the specified API key. |
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* |
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* @param string $text The text to be embedded. |
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* @param string $api_key The API key used for generating embeddings. |
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* @return array|null The embedding vector or null on failure. |
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*/ |
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private static function generate_embedding($text, $api_key) { |
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// Get options and selected model |
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$options = get_option('mxchat_options'); |
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$selected_model = $options['embedding_model'] ?? 'text-embedding-ada-002'; |
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|
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// Determine endpoint and API key based on model |
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if (strpos($selected_model, 'voyage') === 0) { |
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$endpoint = 'https://api.voyageai.com/v1/embeddings'; |
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$api_key = $options['voyage_api_key'] ?? ''; |
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} elseif (strpos($selected_model, 'gemini-embedding') === 0) { |
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$endpoint = 'https://generativelanguage.googleapis.com/v1beta/models/' . $selected_model . ':embedContent'; |
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$api_key = $options['gemini_api_key'] ?? ''; |
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} else { |
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$endpoint = 'https://api.openai.com/v1/embeddings'; |
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// Use the passed API key for OpenAI |
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} |
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|
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// Prepare request body based on provider |
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if (strpos($selected_model, 'gemini-embedding') === 0) { |
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// Gemini API format |
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$request_body = [ |
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'model' => 'models/' . $selected_model, |
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'content' => [ |
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'parts' => [ |
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['text' => $text] |
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] |
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], |
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'outputDimensionality' => 1536 |
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]; |
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|
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// Prepare headers for Gemini (API key as query parameter) |
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$endpoint .= '?key=' . $api_key; |
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$headers = [ |
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'Content-Type' => 'application/json' |
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]; |
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} else { |
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// OpenAI/Voyage API format |
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$request_body = [ |
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'input' => $text, |
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'model' => $selected_model |
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]; |
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|
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// Add output_dimension for voyage-3-large |
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if ($selected_model === 'voyage-3-large') { |
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$request_body['output_dimension'] = 2048; |
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} |
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|
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// Prepare headers for OpenAI/Voyage |
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$headers = [ |
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'Content-Type' => 'application/json', |
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'Authorization' => 'Bearer ' . $api_key |
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]; |
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} |
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|
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$args = [ |
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'body' => wp_json_encode($request_body), |
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'headers' => $headers, |
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'timeout' => 60, |
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'redirection' => 5, |
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'blocking' => true, |
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'httpversion' => '1.0', |
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'sslverify' => true, |
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]; |
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|
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$response = wp_remote_post($endpoint, $args); |
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|
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if (is_wp_error($response)) { |
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error_log('Error generating embedding: ' . $response->get_error_message()); |
| 349 |
return null; |
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} |
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|
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$response_body = json_decode(wp_remote_retrieve_body($response), true); |
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|
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// Handle different response formats based on provider |
| 355 |
if (strpos($selected_model, 'gemini-embedding') === 0) { |
| 356 |
// Gemini API response format |
| 357 |
if (isset($response_body['embedding']['values']) && is_array($response_body['embedding']['values'])) { |
| 358 |
return $response_body['embedding']['values']; |
| 359 |
} else { |
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error_log('Invalid response received from Gemini embedding API: ' . wp_json_encode($response_body)); |
| 361 |
return null; |
| 362 |
} |
| 363 |
} else { |
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// OpenAI/Voyage API response format |
| 365 |
if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) { |
| 366 |
return $response_body['data'][0]['embedding']; |
| 367 |
} else { |
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error_log('Invalid response received from embedding API: ' . wp_json_encode($response_body)); |
| 369 |
return null; |
| 370 |
} |
| 371 |
} |
| 372 |
} |
| 373 |
} |
