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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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* WC_Cache_Helper class. |
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* |
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* @class WC_Cache_Helper |
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* @version 2.2.0 |
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* @package WooCommerce/Classes |
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* @category Class |
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* @author WooThemes |
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*/ |
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class WC_Cache_Helper { |
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/** |
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* Hook in methods. |
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*/ |
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public static function init() { |
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add_action( 'template_redirect', array( __CLASS__, 'geolocation_ajax_redirect' ) ); |
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add_action( 'before_woocommerce_init', array( __CLASS__, 'prevent_caching' ) ); |
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add_action( 'admin_notices', array( __CLASS__, 'notices' ) ); |
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add_action( 'delete_version_transients', array( __CLASS__, 'delete_version_transients' ) ); |
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} |
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/** |
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* Get prefix for use with wp_cache_set. Allows all cache in a group to be invalidated at once. |
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* @param string $group |
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* @return string |
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*/ |
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public static function get_cache_prefix( $group ) { |
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// Get cache key - uses cache key wc_orders_cache_prefix to invalidate when needed |
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$prefix = wp_cache_get( 'wc_' . $group . '_cache_prefix', $group ); |
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if ( false === $prefix ) { |
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$prefix = 1; |
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wp_cache_set( 'wc_' . $group . '_cache_prefix', $prefix, $group ); |
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} |
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return 'wc_cache_' . $prefix . '_'; |
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} |
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/** |
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* Increment group cache prefix (invalidates cache). |
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* @param string $group |
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*/ |
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public static function incr_cache_prefix( $group ) { |
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wp_cache_incr( 'wc_' . $group . '_cache_prefix', 1, $group ); |
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} |
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/** |
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* Get a hash of the customer location. |
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* @return string |
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*/ |
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public static function geolocation_ajax_get_location_hash() { |
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$customer = new WC_Customer(); |
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$customer->load_session(); |
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$location = array(); |
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$location['country'] = $customer->get_billing_country(); |
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$location['state'] = $customer->get_billing_state(); |
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$location['postcode'] = $customer->get_billing_postcode(); |
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$location['city'] = $customer->get_billing_city(); |
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return substr( md5( implode( '', $location ) ), 0, 12 ); |
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} |
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/** |
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* When using geolocation via ajax, to bust cache, redirect if the location hash does not equal the querystring. |
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* |
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* This prevents caching of the wrong data for this request. |
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*/ |
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public static function geolocation_ajax_redirect() { |
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if ( 'geolocation_ajax' === get_option( 'woocommerce_default_customer_address' ) && ! is_checkout() && ! is_cart() && ! is_account_page() && ! is_ajax() && empty( $_POST ) ) { |
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$location_hash = self::geolocation_ajax_get_location_hash(); |
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$current_hash = isset( $_GET['v'] ) ? wc_clean( $_GET['v'] ) : ''; |
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if ( empty( $current_hash ) || $current_hash !== $location_hash ) { |
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global $wp; |
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$redirect_url = trailingslashit( home_url( $wp->request ) ); |
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if ( ! empty( $_SERVER['QUERY_STRING'] ) ) { |
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$redirect_url = add_query_arg( $_SERVER['QUERY_STRING'], '', $redirect_url ); |
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} |
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if ( ! get_option( 'permalink_structure' ) ) { |
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$redirect_url = add_query_arg( $wp->query_string, '', $redirect_url ); |
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} |
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$redirect_url = add_query_arg( 'v', $location_hash, remove_query_arg( 'v', $redirect_url ) ); |
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wp_safe_redirect( esc_url_raw( $redirect_url ), 307 ); |
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exit; |
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} |
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} |
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} |
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/** |
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* Get transient version. |
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* |
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* When using transients with unpredictable names, e.g. those containing an md5. |
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* hash in the name, we need a way to invalidate them all at once. |
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* |
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* When using default WP transients we're able to do this with a DB query to. |
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* delete transients manually. |
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* |
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* With external cache however, this isn't possible. Instead, this function is used. |
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* to append a unique string (based on time()) to each transient. When transients. |
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* are invalidated, the transient version will increment and data will be regenerated. |
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* |
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* Raised in issue https://github.com/woothemes/woocommerce/issues/5777. |
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* Adapted from ideas in http://tollmanz.com/invalidation-schemes/. |
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* |
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* @param string $group Name for the group of transients we need to invalidate |
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* @param boolean $refresh true to force a new version |
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* @return string transient version based on time(), 10 digits |
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*/ |
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public static function get_transient_version( $group, $refresh = false ) { |
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$transient_name = $group . '-transient-version'; |
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$transient_value = get_transient( $transient_name ); |
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if ( false === $transient_value || true === $refresh ) { |
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self::delete_version_transients( $transient_value ); |
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set_transient( $transient_name, $transient_value = time() ); |
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} |
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return $transient_value; |
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} |
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/** |
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* When the transient version increases, this is used to remove all past transients to avoid filling the DB. |
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* |
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* Note; this only works on transients appended with the transient version, and when object caching is not being used. |
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* |
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* @since 2.3.10 |
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*/ |
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public static function delete_version_transients( $version = '' ) { |
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if ( ! wp_using_ext_object_cache() && ! empty( $version ) ) { |
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global $wpdb; |
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$limit = apply_filters( 'woocommerce_delete_version_transients_limit', 1000 ); |
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$affected = $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->options} WHERE option_name LIKE %s ORDER BY option_id LIMIT %d;", "\_transient\_%" . $version, $limit ) ); |
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// If affected rows is equal to limit, there are more rows to delete. Delete in 10 secs. |
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if ( $affected === $limit ) { |
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wp_schedule_single_event( time() + 10, 'delete_version_transients', array( $version ) ); |
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} |
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} |
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} |
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/** |
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* Get the page name/id for a WC page. |
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* @param string $wc_page |
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* @return array |
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*/ |
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private static function get_page_uris( $wc_page ) { |
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$wc_page_uris = array(); |
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if ( ( $page_id = wc_get_page_id( $wc_page ) ) && $page_id > 0 && ( $page = get_post( $page_id ) ) ) { |
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$wc_page_uris[] = 'p=' . $page_id; |
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$wc_page_uris[] = '/' . $page->post_name . '/'; |
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} |
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return $wc_page_uris; |
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} |
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/** |
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* Prevent caching on dynamic pages. |
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* @access public |
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*/ |
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public static function prevent_caching() { |
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if ( ! is_blog_installed() ) { |
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return; |
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} |
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if ( false === ( $wc_page_uris = get_transient( 'woocommerce_cache_excluded_uris' ) ) ) { |
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$wc_page_uris = array_filter( array_merge( self::get_page_uris( 'cart' ), self::get_page_uris( 'checkout' ), self::get_page_uris( 'myaccount' ) ) ); |
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set_transient( 'woocommerce_cache_excluded_uris', $wc_page_uris ); |
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} |
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if ( isset( $_GET['download_file'] ) ) { |
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self::nocache(); |
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} elseif ( is_array( $wc_page_uris ) ) { |
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foreach ( $wc_page_uris as $uri ) { |
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if ( stristr( $_SERVER['REQUEST_URI'], $uri ) ) { |
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self::nocache(); |
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break; |
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} |
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} |
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} |
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} |
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/** |
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* Set nocache constants and headers. |
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* @access private |
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*/ |
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private static function nocache() { |
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if ( ! defined( 'DONOTCACHEPAGE' ) ) { |
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define( "DONOTCACHEPAGE", true ); |
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} |
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if ( ! defined( 'DONOTCACHEOBJECT' ) ) { |
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define( "DONOTCACHEOBJECT", true ); |
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} |
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if ( ! defined( 'DONOTCACHEDB' ) ) { |
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define( "DONOTCACHEDB", true ); |
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} |
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nocache_headers(); |
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} |
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/** |
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* notices function. |
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*/ |
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public static function notices() { |
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if ( ! function_exists( 'w3tc_pgcache_flush' ) || ! function_exists( 'w3_instance' ) ) { |
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return; |
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} |
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$config = w3_instance('W3_Config'); |
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$enabled = $config->get_integer( 'dbcache.enabled' ); |
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$settings = array_map( 'trim', $config->get_array( 'dbcache.reject.sql' ) ); |
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if ( $enabled && ! in_array( '_wc_session_', $settings ) ) { |
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?> |
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<div class="error"> |
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<p><?php printf( __( 'In order for <strong>database caching</strong> to work with WooCommerce you must add <code>_wc_session_</code> to the "Ignored Query Strings" option in W3 Total Cache settings <a href="%s">here</a>.', 'woocommerce' ), admin_url( 'admin.php?page=w3tc_dbcache' ) ); ?></p> |
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</div> |
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<?php |
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} |
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} |
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} |
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WC_Cache_Helper::init(); |
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woothemes /
woocommerce
