woocommerce/classes/class-wc-session-transients...

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<?php
/**
* Handle data for the current customers session.
* Implements the WC_Session abstract class
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*
* @class WC_Session_Transients
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* @version 1.7
* @package WooCommerce/Classes
* @author WooThemes
*/
if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
class WC_Session_Transients extends WC_Session {
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/** customer_id */
private $_customer_id;
/** cookie name */
private $_cookie;
/** cookie expiration time */
private $_cookie_expires;
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/**
* Constructor for the session class.
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*
* @access public
* @return void
*/
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public function __construct() {
parent::__construct();
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$this->_cookie = 'wc_session_cookie_' . COOKIEHASH;
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$this->_cookie_expiration = apply_filters( 'wc_session_transients_expiration', 172800 ); // 48 hours default
$this->_customer_id = $this->get_customer_id();
$this->_data = maybe_unserialize( get_transient( 'wc_session_' . $this->_customer_id ) );
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if ( false === $this->_data )
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$this->_data = array();
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}
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/**
* get_customer_id function.
*
* @access private
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* @return mixed
*/
private function get_customer_id() {
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if ( $customer_id = $this->get_session_cookie() ) {
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return $customer_id;
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} elseif ( is_user_logged_in() ) {
return get_current_user_id();
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} else {
return $this->create_customer_id();
}
}
/**
* get_session_cookie function.
*
* @access private
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* @return mixed
*/
private function get_session_cookie() {
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if ( ! isset( $_COOKIE[ $this->_cookie ] ) )
return false;
list( $customer_id, $expires, $hash ) = explode( '|', $_COOKIE[ $this->_cookie ] );
// Validate hash
$data = $customer_id . $expires;
$rehash = hash_hmac( 'md5', $data, wp_hash( $data ) );
if ( $hash != $rehash )
return false;
return $customer_id;
}
/**
* Create a unqiue customer ID and store it in a cookie, along with its hashed value and expirey date. Stored for 48hours.
*
* @access private
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* @return void
*/
private function create_customer_id() {
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$customer_id = wp_generate_password( 32 ); // Ensure this and the transient is < 45 chars. wc_session_ leaves 34.
$expires = time() + $this->_cookie_expiration;
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$data = $customer_id . $expires;
$hash = hash_hmac( 'md5', $data, wp_hash( $data ) );
$value = $customer_id . '|' . $expires . '|' . $hash;
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setcookie( $this->_cookie, $value, $expires, COOKIEPATH, COOKIE_DOMAIN, false, true );
return $customer_id;
}
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/**
* save_data function.
*
* @access public
* @return void
*/
public function save_data() {
// Set cart data
set_transient( 'wc_session_' . $this->_customer_id, $this->_data, $this->_cookie_expiration );
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}
}