Current File : /var/www/html/ceaa/wp-content/plugins/woocommerce/includes/class-wc-cache-helper.php
<?php
/**
* WC_Cache_Helper class.
*
* @package WooCommerce/Classes
*/
defined( 'ABSPATH' ) || exit;
/**
* WC_Cache_Helper.
*/
class WC_Cache_Helper {
/**
* Hook in methods.
*/
public static function init() {
add_action( 'template_redirect', array( __CLASS__, 'geolocation_ajax_redirect' ) );
add_action( 'admin_notices', array( __CLASS__, 'notices' ) );
add_action( 'delete_version_transients', array( __CLASS__, 'delete_version_transients' ) );
add_action( 'wp', array( __CLASS__, 'prevent_caching' ) );
add_action( 'clean_term_cache', array( __CLASS__, 'clean_term_cache' ), 10, 2 );
add_action( 'edit_terms', array( __CLASS__, 'clean_term_cache' ), 10, 2 );
}
/**
* Get prefix for use with wp_cache_set. Allows all cache in a group to be invalidated at once.
*
* @param string $group Group of cache to get.
* @return string
*/
public static function get_cache_prefix( $group ) {
// Get cache key - uses cache key wc_orders_cache_prefix to invalidate when needed.
$prefix = wp_cache_get( 'wc_' . $group . '_cache_prefix', $group );
if ( false === $prefix ) {
$prefix = 1;
wp_cache_set( 'wc_' . $group . '_cache_prefix', $prefix, $group );
}
return 'wc_cache_' . $prefix . '_';
}
/**
* Increment group cache prefix (invalidates cache).
*
* @param string $group Group of cache to clear.
*/
public static function incr_cache_prefix( $group ) {
wp_cache_incr( 'wc_' . $group . '_cache_prefix', 1, $group );
}
/**
* Get a hash of the customer location.
*
* @return string
*/
public static function geolocation_ajax_get_location_hash() {
$customer = new WC_Customer( 0, true );
$location = array();
$location['country'] = $customer->get_billing_country();
$location['state'] = $customer->get_billing_state();
$location['postcode'] = $customer->get_billing_postcode();
$location['city'] = $customer->get_billing_city();
return substr( md5( implode( '', $location ) ), 0, 12 );
}
/**
* Prevent caching on certain pages
*/
public static function prevent_caching() {
if ( ! is_blog_installed() ) {
return;
}
$page_ids = array_filter( array( wc_get_page_id( 'cart' ), wc_get_page_id( 'checkout' ), wc_get_page_id( 'myaccount' ) ) );
if ( is_page( $page_ids ) ) {
self::set_nocache_constants();
nocache_headers();
}
}
/**
* When using geolocation via ajax, to bust cache, redirect if the location hash does not equal the querystring.
*
* This prevents caching of the wrong data for this request.
*/
public static function geolocation_ajax_redirect() {
if ( 'geolocation_ajax' === get_option( 'woocommerce_default_customer_address' ) && ! is_checkout() && ! is_cart() && ! is_account_page() && ! is_ajax() && empty( $_POST ) ) { // WPCS: CSRF ok, input var ok.
$location_hash = self::geolocation_ajax_get_location_hash();
$current_hash = isset( $_GET['v'] ) ? wc_clean( wp_unslash( $_GET['v'] ) ) : ''; // WPCS: sanitization ok, input var ok, CSRF ok.
if ( empty( $current_hash ) || $current_hash !== $location_hash ) {
global $wp;
$redirect_url = trailingslashit( home_url( $wp->request ) );
if ( ! empty( $_SERVER['QUERY_STRING'] ) ) { // WPCS: Input var ok.
$redirect_url = add_query_arg( wp_unslash( $_SERVER['QUERY_STRING'] ), '', $redirect_url ); // WPCS: sanitization ok, Input var ok.
}
if ( ! get_option( 'permalink_structure' ) ) {
$redirect_url = add_query_arg( $wp->query_string, '', $redirect_url );
}
$redirect_url = add_query_arg( 'v', $location_hash, remove_query_arg( 'v', $redirect_url ) );
wp_safe_redirect( esc_url_raw( $redirect_url ), 307 );
exit;
}
}
}
/**
* Get transient version.
*
* When using transients with unpredictable names, e.g. those containing an md5
* hash in the name, we need a way to invalidate them all at once.
*
* When using default WP transients we're able to do this with a DB query to
* delete transients manually.
*
* With external cache however, this isn't possible. Instead, this function is used
* to append a unique string (based on time()) to each transient. When transients
* are invalidated, the transient version will increment and data will be regenerated.
*
* Raised in issue https://github.com/woocommerce/woocommerce/issues/5777.
* Adapted from ideas in http://tollmanz.com/invalidation-schemes/.
*
* @param string $group Name for the group of transients we need to invalidate.
* @param boolean $refresh true to force a new version.
* @return string transient version based on time(), 10 digits.
*/
public static function get_transient_version( $group, $refresh = false ) {
$transient_name = $group . '-transient-version';
$transient_value = get_transient( $transient_name );
$transient_value = strval( $transient_value ? $transient_value : '' );
if ( '' === $transient_value || true === $refresh ) {
$old_transient_value = $transient_value;
$transient_value = (string) time();
if ( $old_transient_value === $transient_value ) {
// Time did not change but transient needs flushing now.
self::delete_version_transients( $transient_value );
} else {
self::queue_delete_version_transients( $transient_value );
}
set_transient( $transient_name, $transient_value );
}
return $transient_value;
}
/**
* Queues a cleanup event for version transients.
*
* @param string $version Version of the transient to remove.
*/
protected static function queue_delete_version_transients( $version = '' ) {
if ( ! wp_using_ext_object_cache() && ! empty( $version ) ) {
wp_schedule_single_event( time() + 30, 'delete_version_transients', array( $version ) );
}
}
/**
* When the transient version increases, this is used to remove all past transients to avoid filling the DB.
*
* Note; this only works on transients appended with the transient version, and when object caching is not being used.
*
* @since 2.3.10
* @param string $version Version of the transient to remove.
*/
public static function delete_version_transients( $version = '' ) {
if ( ! wp_using_ext_object_cache() && ! empty( $version ) ) {
global $wpdb;
$limit = apply_filters( 'woocommerce_delete_version_transients_limit', 1000 );
if ( ! $limit ) {
return;
}
$affected = $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->options} WHERE option_name LIKE %s ORDER BY option_id LIMIT %d;", '\_transient\_%' . $version, $limit ) ); // WPCS: cache ok, db call ok.
// If affected rows is equal to limit, there are more rows to delete. Delete in 30 secs.
if ( $affected === $limit ) {
self::queue_delete_version_transients( $version );
}
}
}
/**
* Set constants to prevent caching by some plugins.
*
* @param mixed $return Value to return. Previously hooked into a filter.
* @return mixed
*/
public static function set_nocache_constants( $return = true ) {
wc_maybe_define_constant( 'DONOTCACHEPAGE', true );
wc_maybe_define_constant( 'DONOTCACHEOBJECT', true );
wc_maybe_define_constant( 'DONOTCACHEDB', true );
return $return;
}
/**
* Notices function.
*/
public static function notices() {
if ( ! function_exists( 'w3tc_pgcache_flush' ) || ! function_exists( 'w3_instance' ) ) {
return;
}
$config = w3_instance( 'W3_Config' );
$enabled = $config->get_integer( 'dbcache.enabled' );
$settings = array_map( 'trim', $config->get_array( 'dbcache.reject.sql' ) );
if ( $enabled && ! in_array( '_wc_session_', $settings, true ) ) {
?>
<div class="error">
<p>
<?php
/* translators: 1: key 2: URL */
echo wp_kses_post( sprintf( __( 'In order for <strong>database caching</strong> to work with WooCommerce you must add %1$s to the "Ignored Query Strings" option in <a href="%2$s">W3 Total Cache settings</a>.', 'woocommerce' ), '<code>_wc_session_</code>', esc_url( admin_url( 'admin.php?page=w3tc_dbcache' ) ) ) );
?>
</p>
</div>
<?php
}
}
/**
* Clean term caches added by WooCommerce.
*
* @since 3.3.4
* @param array|int $ids Array of ids or single ID to clear cache for.
* @param string $taxonomy Taxonomy name.
*/
public static function clean_term_cache( $ids, $taxonomy ) {
if ( 'product_cat' === $taxonomy ) {
$ids = is_array( $ids ) ? $ids : array( $ids );
$clear_ids = array( 0 );
foreach ( $ids as $id ) {
$clear_ids[] = $id;
$clear_ids = array_merge( $clear_ids, get_ancestors( $id, 'product_cat', 'taxonomy' ) );
}
$clear_ids = array_unique( $clear_ids );
foreach ( $clear_ids as $id ) {
wp_cache_delete( 'product-category-hierarchy-' . $id, 'product_cat' );
}
}
}
}
WC_Cache_Helper::init();
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