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<?php
namespace Automattic\WooCommerce\StoreApi;
use Automattic\Jetpack\Constants;
use Automattic\WooCommerce\StoreApi\Utilities\JsonWebToken;
use WC_Session;
defined( 'ABSPATH' ) || exit;
/**
* SessionHandler class
*/
final class SessionHandler extends WC_Session {
/**
* Token from HTTP headers.
*
* @var string
*/
protected $token;
/**
* Table name for session data.
*
* @var string Custom session table name
*/
protected $table;
/**
* Expiration timestamp.
*
* @var int
*/
protected $session_expiration;
/**
* Constructor for the session class.
*/
public function __construct() {
$this->token = wc_clean( wp_unslash( $_SERVER['HTTP_CART_TOKEN'] ?? '' ) );
$this->table = $GLOBALS['wpdb']->prefix . 'woocommerce_sessions';
}
/**
* Init hooks and session data.
*/
public function init() {
$this->init_session_from_token();
add_action( 'shutdown', array( $this, 'save_data' ), 20 );
}
/**
* Process the token header to load the correct session.
*/
protected function init_session_from_token() {
$payload = JsonWebToken::get_parts( $this->token )->payload;
$this->_customer_id = $payload->user_id;
$this->session_expiration = $payload->exp;
$this->_data = (array) $this->get_session( $this->_customer_id, array() );
}
/**
* Returns the session.
*
* @param string $customer_id Customer ID.
* @param mixed $default Default session value.
*
* @return string|array|bool
*/
public function get_session( $customer_id, $default = false ) {
global $wpdb;
// This mimics behaviour from default WC_Session_Handler class. There will be no sessions retrieved while WP setup is due.
if ( Constants::is_defined( 'WP_SETUP_CONFIG' ) ) {
return false;
}
$value = $wpdb->get_var(
$wpdb->prepare(
"SELECT session_value FROM $this->table WHERE session_key = %s", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
$customer_id
)
);
if ( is_null( $value ) ) {
$value = $default;
}
return maybe_unserialize( $value );
}
/**
* Save data and delete user session.
*/
public function save_data() {
// Dirty if something changed - prevents saving nothing new.
if ( $this->_dirty ) {
global $wpdb;
$wpdb->query(
$wpdb->prepare(
"INSERT INTO $this->table (`session_key`, `session_value`, `session_expiry`) VALUES (%s, %s, %d) ON DUPLICATE KEY UPDATE `session_value` = VALUES(`session_value`), `session_expiry` = VALUES(`session_expiry`)", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
$this->_customer_id,
maybe_serialize( $this->_data ),
$this->session_expiration
)
);
$this->_dirty = false;
}
}
}
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