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<?php |
| 2 |
if (!defined('ABSPATH')) { |
| 3 |
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 $wpdb; |
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|
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//error_log('[MXCHAT-DB] ===== Using WordPress-only storage ====='); |
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|
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// ===== UPDATED: Only check for existing entries if we have a real source URL ===== |
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$existing_id = null; |
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|
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// Only check for duplicates if we have a valid, non-empty source URL |
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if (!empty($source_url) && $source_url !== '' && filter_var($source_url, FILTER_VALIDATE_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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//error_log('[MXCHAT-DB] Checked for existing URL, found ID: ' . ($existing_id ?: 'none')); |
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} else { |
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//error_log('[MXCHAT-DB] No valid source URL provided - treating as new manual content (will not check for duplicates)'); |
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} |
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// ===== END UPDATE ===== |
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|
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// Progressive fallback mechanism for problematic content |
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$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 (source_url can be empty for manual content) |
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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, // Can be empty for manual content |
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'article_content' => $current_content, |
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'embedding_vector' => $embedding_vector_serialized, |
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'source_url' => $source_url, // Can be empty for manual content |
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'timestamp' => current_time('mysql'), |
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), |
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array('%s','%s','%s','%s','%s') |
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); |
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} |
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|
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if ($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, $vector_id = null) { |
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//error_log('[MXCHAT-PINECONE-MAIN] ===== Starting Pinecone storage ====='); |
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|
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// ===== UPDATED: Handle manual content with unique vector IDs ===== |
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if ($vector_id) { |
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// Use provided vector ID |
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//error_log('[MXCHAT-PINECONE-MAIN] Using provided vector ID: ' . $vector_id); |
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} elseif (!empty($url) && filter_var($url, FILTER_VALIDATE_URL)) { |
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// For valid URLs, use URL-based ID (existing behavior) |
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$vector_id = md5($url); |
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//error_log('[MXCHAT-PINECONE-MAIN] Generated vector ID from URL: ' . $vector_id); |
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} else { |
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// For manual content (empty/invalid URL), generate unique ID |
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$vector_id = 'manual_' . time() . '_' . substr(md5($content . microtime(true)), 0, 8); |
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//error_log('[MXCHAT-PINECONE-MAIN] Generated unique vector ID for manual content: ' . $vector_id); |
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} |
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// ===== END UPDATE ===== |
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|
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$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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// ===== UPDATED: Determine content type more accurately ===== |
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$is_product = false; |
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$content_type = 'manual'; // Default for manual content |
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|
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if (!empty($url) && filter_var($url, FILTER_VALIDATE_URL)) { |
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$is_product = (strpos($url, '/product/') !== false || strpos($url, '/shop/') !== false); |
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$content_type = $is_product ? 'product' : 'content'; |
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} |
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|
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//error_log('[MXCHAT-PINECONE-MAIN] Content type: ' . $content_type); |
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// ===== END UPDATE ===== |
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|
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$api_endpoint = "https://{$host}/vectors/upsert"; |
| 247 |
//error_log('[MXCHAT-PINECONE-MAIN] API endpoint: ' . $api_endpoint); |
| 248 |
|
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$request_body = array( |
| 250 |
'vectors' => array( |
| 251 |
array( |
| 252 |
'id' => $vector_id, |
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'values' => $embedding_vector, |
| 254 |
'metadata' => array( |
| 255 |
'text' => $content, |
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'source_url' => $url, // Can be empty for manual content |
| 257 |
'type' => $content_type, // 'manual', 'content', or 'product' |
| 258 |
'last_updated' => time(), |
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'created_at' => time() // Add creation timestamp |
| 260 |
) |
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) |
| 262 |
) |
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); |
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|
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//error_log('[MXCHAT-PINECONE-MAIN] Request body prepared (embedding dimensions: ' . count($embedding_vector) . ')'); |
| 266 |
|
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$response = wp_remote_post($api_endpoint, array( |
| 268 |
'headers' => array( |
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'Api-Key' => $api_key, |
| 270 |
'accept' => 'application/json', |
| 271 |
'content-type' => 'application/json' |
| 272 |
), |
| 273 |
'body' => wp_json_encode($request_body), |
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'timeout' => 30, |
| 275 |
'data_format' => 'body' |
| 276 |
)); |
| 277 |
|
| 278 |
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', $response->get_error_message()); |
| 281 |
} |
| 282 |
|
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$response_code = wp_remote_retrieve_response_code($response); |
| 284 |
//error_log('[MXCHAT-PINECONE-MAIN] Response code: ' . $response_code); |
| 285 |
|
| 286 |
if ($response_code !== 200) { |
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$body = wp_remote_retrieve_body($response); |
| 288 |
//error_log('[MXCHAT-PINECONE-MAIN] API error - Response body: ' . $body); |
| 289 |
return new WP_Error('pinecone_api', sprintf( |
| 290 |
'Pinecone API error (HTTP %d): %s', |
| 291 |
$response_code, |
| 292 |
$body |
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)); |
| 294 |
} |
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|
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$response_body = wp_remote_retrieve_body($response); |
| 297 |
//error_log('[MXCHAT-PINECONE-MAIN] Success response: ' . $response_body); |
| 298 |
//error_log('[MXCHAT-PINECONE-MAIN] Successfully stored in Pinecone'); |
| 299 |
//error_log('[MXCHAT-PINECONE-MAIN] ===== Pinecone storage complete ====='); |
| 300 |
|
| 301 |
return true; |
| 302 |
} |
| 303 |
/** |
| 304 |
* Generate an embedding for the given text using the specified API key. |
| 305 |
* |
| 306 |
* @param string $text The text to be embedded. |
| 307 |
* @param string $api_key The API key used for generating embeddings. |
| 308 |
* @return array|null The embedding vector or null on failure. |
| 309 |
*/ |
| 310 |
private static function generate_embedding($text, $api_key) { |
| 311 |
// Get options and selected model |
| 312 |
$options = get_option('mxchat_options'); |
| 313 |
$selected_model = $options['embedding_model'] ?? 'text-embedding-ada-002'; |
| 314 |
|
| 315 |
// Determine endpoint and API key based on model |
| 316 |
if (strpos($selected_model, 'voyage') === 0) { |
| 317 |
$endpoint = 'https://api.voyageai.com/v1/embeddings'; |
| 318 |
$api_key = $options['voyage_api_key'] ?? ''; |
| 319 |
} elseif (strpos($selected_model, 'gemini-embedding') === 0) { |
| 320 |
$endpoint = 'https://generativelanguage.googleapis.com/v1beta/models/' . $selected_model . ':embedContent'; |
| 321 |
$api_key = $options['gemini_api_key'] ?? ''; |
| 322 |
} else { |
| 323 |
$endpoint = 'https://api.openai.com/v1/embeddings'; |
| 324 |
// Use the passed API key for OpenAI |
| 325 |
} |
| 326 |
|
| 327 |
// Prepare request body based on provider |
| 328 |
if (strpos($selected_model, 'gemini-embedding') === 0) { |
| 329 |
// Gemini API format |
| 330 |
$request_body = [ |
| 331 |
'model' => 'models/' . $selected_model, |
| 332 |
'content' => [ |
| 333 |
'parts' => [ |
| 334 |
['text' => $text] |
| 335 |
] |
| 336 |
], |
| 337 |
'outputDimensionality' => 1536 |
| 338 |
]; |
| 339 |
|
| 340 |
// Prepare headers for Gemini (API key as query parameter) |
| 341 |
$endpoint .= '?key=' . $api_key; |
| 342 |
$headers = [ |
| 343 |
'Content-Type' => 'application/json' |
| 344 |
]; |
| 345 |
} else { |
| 346 |
// OpenAI/Voyage API format |
| 347 |
$request_body = [ |
| 348 |
'input' => $text, |
| 349 |
'model' => $selected_model |
| 350 |
]; |
| 351 |
|
| 352 |
// Add output_dimension for voyage-3-large |
| 353 |
if ($selected_model === 'voyage-3-large') { |
| 354 |
$request_body['output_dimension'] = 2048; |
| 355 |
} |
| 356 |
|
| 357 |
// Prepare headers for OpenAI/Voyage |
| 358 |
$headers = [ |
| 359 |
'Content-Type' => 'application/json', |
| 360 |
'Authorization' => 'Bearer ' . $api_key |
| 361 |
]; |
| 362 |
} |
| 363 |
|
| 364 |
$args = [ |
| 365 |
'body' => wp_json_encode($request_body), |
| 366 |
'headers' => $headers, |
| 367 |
'timeout' => 60, |
| 368 |
'redirection' => 5, |
| 369 |
'blocking' => true, |
| 370 |
'httpversion' => '1.0', |
| 371 |
'sslverify' => true, |
| 372 |
]; |
| 373 |
|
| 374 |
$response = wp_remote_post($endpoint, $args); |
| 375 |
|
| 376 |
if (is_wp_error($response)) { |
| 377 |
//error_log('Error generating embedding: ' . $response->get_error_message()); |
| 378 |
return null; |
| 379 |
} |
| 380 |
|
| 381 |
$response_body = json_decode(wp_remote_retrieve_body($response), true); |
| 382 |
|
| 383 |
// Handle different response formats based on provider |
| 384 |
if (strpos($selected_model, 'gemini-embedding') === 0) { |
| 385 |
// Gemini API response format |
| 386 |
if (isset($response_body['embedding']['values']) && is_array($response_body['embedding']['values'])) { |
| 387 |
return $response_body['embedding']['values']; |
| 388 |
} else { |
| 389 |
//error_log('Invalid response received from Gemini embedding API: ' . wp_json_encode($response_body)); |
| 390 |
return null; |
| 391 |
} |
| 392 |
} else { |
| 393 |
// OpenAI/Voyage API response format |
| 394 |
if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) { |
| 395 |
return $response_body['data'][0]['embedding']; |
| 396 |
} else { |
| 397 |
//error_log('Invalid response received from embedding API: ' . wp_json_encode($response_body)); |
| 398 |
return null; |
| 399 |
} |
| 400 |
} |
| 401 |
} |
| 402 |
} |
