encrypt_string( $key ) ); } } /** * Encrypt a string using a secure method. * * @param string $string * @return string|null */ public function encrypt_string( $string ) { $encryption_key = wp_salt(); return base64_encode( openssl_encrypt( $string, 'aes-256-cbc', $encryption_key, 0, substr( $encryption_key, 0, 16 ) ) ); } /** * Decrypt a string using a secure method. * * @param string $string * @return string|null */ public function decrypt_string( $string ) { $encryption_key = wp_salt(); return openssl_decrypt( base64_decode( $string ), 'aes-256-cbc', $encryption_key, 0, substr( $encryption_key, 0, 16 ) ); } /** * Get AI API key from the WordPress options table. * * @return string|null */ public function get_key() { $encrypted_key = get_option( self::API_KEY_STORAGE ); return $this->decrypt_string( $encrypted_key ); } /** * Get the list of models from the WordPress options table. * * @return array */ public function get_models() { $models = get_transient( self::MODELS_STORAGE ); return is_array( $models ) ? $models : []; } /** * Set the list of models in the WordPress options table. * * @param array $models * @return void */ public function set_models( array $models ) { if ( empty( $models ) ) { delete_transient( self::MODELS_STORAGE ); } else { set_transient( self::MODELS_STORAGE, $models, 2 * HOUR_IN_SECONDS ); } } public function set_model( $model ) { if ( ! $model ) { delete_option( self::SELECTED_MODEL ); } else { update_option( self::SELECTED_MODEL, $model ); } } public function get_model() { return get_option( self::SELECTED_MODEL, 'gpt-5-mini' ); } }