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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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* |
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* If the source_url already exists, update that row. |
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* Otherwise, insert a new row. |
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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 $api_key The API key used for generating embeddings. |
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*/ |
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public static function submit_content_to_db($content, $source_url, $api_key) { |
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global $wpdb; |
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$table_name = $wpdb->prefix . 'mxchat_system_prompt_content'; |
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|
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// Sanitize the source URL |
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$source_url = esc_url_raw($source_url); |
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|
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// Generate the embedding using the API key |
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$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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$embedding_vector_serialized = maybe_serialize($embedding_vector); |
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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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if ($existing_id) { |
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// Update the existing row |
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$wpdb->update( |
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$table_name, |
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array( |
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'article_content' => $content, |
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'embedding_vector' => $embedding_vector_serialized, |
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'timestamp' => current_time('mysql'), // Remove if your table doesn't have a timestamp column |
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), |
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array('id' => $existing_id), |
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array('%s','%s','%s'), |
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array('%d') |
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); |
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} else { |
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// Insert a new row |
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$wpdb->insert( |
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$table_name, |
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array( |
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'article_content' => $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'), // Remove if your table doesn't have a timestamp column |
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), |
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array('%s','%s','%s','%s') |
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); |
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} |
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} else { |
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// If embedding generation failed, you could log or handle it here |
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// error_log('Embedding generation failed for content from ' . $source_url); |
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} |
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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 = $options['voyage_api_key'] ?? ''; |
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} else { |
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$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 |
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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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$request_body['output_dimension'] = 2048; |
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} |
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|
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$args = [ |
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'body' => wp_json_encode($request_body), |
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'headers' => [ |
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'Content-Type' => 'application/json', |
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'Authorization' => 'Bearer ' . $api_key, |
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], |
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'timeout' => 60, |
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'redirection' => 5, |
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'blocking' => true, |
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'httpversion' => '1.0', |
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'sslverify' => true, |
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]; |
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|
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$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: ' . $response->get_error_message()); |
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return null; |
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} |
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|
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$response_body = json_decode(wp_remote_retrieve_body($response), true); |
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|
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if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) { |
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return $response_body['data'][0]['embedding']; |
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} else { |
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error_log('Invalid response received from embedding API: ' . wp_json_encode($response_body)); |
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return null; |
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} |
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} |
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|
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|
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} |
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|
