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Path: ~//var/softaculous/sitepad/editor/site-data/plugins/kkart-pro/includes/

File Content: `class-kkart-cache-helper.php`

<?php
/**
 * KKART_Cache_Helper class.
 *
 * @package Kkart\Classes
 */

defined( 'ABSPATH' ) || exit;

/**
 * KKART_Cache_Helper.
 */
class KKART_Cache_Helper {

	/**
	 * Transients to delete on shutdown.
	 *
	 * @var array Array of transient keys.
	 */
	private static $delete_transients = array();

	/**
	 * Hook in methods.
	 */
	public static function init() {
		add_filter( 'nocache_headers', array( __CLASS__, 'additional_nocache_headers' ), 10 );
		add_action( 'shutdown', array( __CLASS__, 'delete_transients_on_shutdown' ), 10 );
		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' ), 10 );
		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 );
	}

	/**
	 * Set additional nocache headers.
	 *
	 * @param array $headers Header names and field values.
	 * @since 3.6.0
	 */
	public static function additional_nocache_headers( $headers ) {
		$agent = isset( $_SERVER['HTTP_USER_AGENT'] ) ? wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) : ''; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		/**
		 * Allow plugins to enable nocache headers. Enabled for Google weblight.
		 *
		 * @see   https://support.google.com/webmasters/answer/1061943?hl=en
		 * @param bool $enable_nocache_headers Flag indicating whether to add nocache headers. Default: false.
		 */
		if ( false !== strpos( $agent, 'googleweblight' ) || apply_filters( 'kkart_enable_nocache_headers', false ) ) {
			// no-transform: Opt-out of Google weblight. https://support.google.com/webmasters/answer/6211428?hl=en.
			$headers['Cache-Control'] = 'no-transform, no-cache, no-store, must-revalidate';
		}
		return $headers;
	}

	/**
	 * Add a transient to delete on shutdown.
	 *
	 * @since 3.6.0
	 * @param string|array $keys Transient key or keys.
	 */
	public static function queue_delete_transient( $keys ) {
		self::$delete_transients = array_unique( array_merge( is_array( $keys ) ? $keys : array( $keys ), self::$delete_transients ) );
	}

	/**
	 * Transients that don't need to be cleaned right away can be deleted on shutdown to avoid repetition.
	 *
	 * @since 3.6.0
	 */
	public static function delete_transients_on_shutdown() {
		if ( self::$delete_transients ) {
			foreach ( self::$delete_transients as $key ) {
				delete_transient( $key );
			}
			self::$delete_transients = array();
		}
	}

	/**
	 * Used to clear layered nav counts based on passed attribute names.
	 *
	 * @since 3.6.0
	 * @param array $attribute_keys Attribute keys.
	 */
	public static function invalidate_attribute_count( $attribute_keys ) {
		if ( $attribute_keys ) {
			foreach ( $attribute_keys as $attribute_key ) {
				self::queue_delete_transient( 'kkart_layered_nav_counts_' . $attribute_key );
			}
		}
	}

	/**
	 * 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 kkart_orders_cache_prefix to invalidate when needed.
		$prefix = wp_cache_get( 'kkart_' . $group . '_cache_prefix', $group );

		if ( false === $prefix ) {
			$prefix = microtime();
			wp_cache_set( 'kkart_' . $group . '_cache_prefix', $prefix, $group );
		}

		return 'kkart_cache_' . $prefix . '_';
	}

	/**
	 * Increment group cache prefix (invalidates cache).
	 *
	 * @param string $group Group of cache to clear.
	 */
	public static function incr_cache_prefix( $group ) {
		kkart_deprecated_function( 'KKART_Cache_Helper::incr_cache_prefix', '3.9.0', 'KKART_Cache_Helper::invalidate_cache_group' );
		self::invalidate_cache_group( $group );
	}

	/**
	 * Invalidate cache group.
	 *
	 * @param string $group Group of cache to clear.
	 * @since 3.9.0
	 */
	public static function invalidate_cache_group( $group ) {
		wp_cache_set( 'kkart_' . $group . '_cache_prefix', microtime(), $group );
	}

	/**
	 * Get a hash of the customer location.
	 *
	 * @return string
	 */
	public static function geolocation_ajax_get_location_hash() {
		$customer             = new KKART_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 apply_filters( 'kkart_geolocation_ajax_get_location_hash', substr( md5( implode( '', $location ) ), 0, 12 ), $location, $customer );
	}

	/**
	 * Prevent caching on certain pages
	 */
	public static function prevent_caching() {
		if ( ! is_blog_installed() ) {
			return;
		}
		$page_ids = array_filter( array( kkart_get_page_id( 'cart' ), kkart_get_page_id( 'checkout' ), kkart_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( 'kkart_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'] ) ? kkart_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/kkart/kkart/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 );

		if ( false === $transient_value || true === $refresh ) {
			$transient_value = (string) time();

			set_transient( $transient_name, $transient_value );
		}

		return $transient_value;
	}

	/**
	 * 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 ) {
		kkart_maybe_define_constant( 'DONOTCACHEPAGE', true );
		kkart_maybe_define_constant( 'DONOTCACHEOBJECT', true );
		kkart_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( '_kkart_session_', $settings, true ) ) {
			?>
			<div class="error">
				<p>
				<?php
				/* translators: 1: key 2: URL */
				echo wp_kses_post( sprintf( __( 'In order for <strong>database caching</strong> to work with Kkart you must add %1$s to the "Ignored Query Strings" option in <a href="%2$s">W3 Total Cache settings</a>.', 'kkart' ), '<code>_kkart_session_</code>', esc_url( admin_url( 'admin.php?page=w3tc_dbcache' ) ) ) );
				?>
				</p>
			</div>
			<?php
		}
	}

	/**
	 * Clean term caches added by Kkart.
	 *
	 * @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' );
			}
		}
	}

	/**
	 * 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.
	 *
	 * @deprecated 3.6.0 Adjusted transient usage to include versions within the transient values, making this cleanup obsolete.
	 * @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( 'kkart_delete_version_transients_limit', 1000 );

			if ( ! $limit ) {
				return;
			}

			$affected = $wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->options} WHERE option_name LIKE %s 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 ) {
				wp_schedule_single_event( time() + 30, 'delete_version_transients', array( $version ) );
			}
		}
	}
}

KKART_Cache_Helper::init();

Edit Rename Chmod Delete

FILE FOLDER

Name	Size	Permission
abstracts	---	0755
admin	---	0755
cli	---	0755
customizer	---	0755
data-stores	---	0755
emails	---	0755
export	---	0755
gateways	---	0755
import	---	0755
integrations	---	0755
interfaces	---	0755
legacy	---	0755
libraries	---	0755
log-handlers	---	0755
payment-tokens	---	0755
queue	---	0755
rest-api	---	0755
shipping	---	0755
shortcodes	---	0755
theme-support	---	0755
tracks	---	0755
traits	---	0755
walkers	---	0755
wccom-site	---	0755
widgets	---	0755
body-props-settings.php	8379 bytes	0644
class-kkart-ajax.php	131339 bytes	0644
class-kkart-api.php	5090 bytes	0644
class-kkart-auth.php	11939 bytes	0644
class-kkart-autoloader.php	2842 bytes	0644
class-kkart-background-emailer.php	4703 bytes	0644
class-kkart-background-updater.php	3580 bytes	0644
class-kkart-breadcrumb.php	9692 bytes	0644
class-kkart-cache-helper.php	10967 bytes	0644
class-kkart-cart-fees.php	3498 bytes	0644
class-kkart-cart-session.php	14806 bytes	0644
class-kkart-cart-totals.php	28388 bytes	0644
class-kkart-cart.php	64753 bytes	0644
class-kkart-checkout.php	45656 bytes	0644
class-kkart-cli.php	1043 bytes	0644
class-kkart-comments.php	13305 bytes	0644
class-kkart-countries.php	43222 bytes	0644
class-kkart-coupon.php	33350 bytes	0644
class-kkart-customer-download-log.php	3458 bytes	0644
class-kkart-customer-download.php	10606 bytes	0644
class-kkart-customer.php	27894 bytes	0644
class-kkart-data-exception.php	1306 bytes	0644
class-kkart-data-store.php	6022 bytes	0644
class-kkart-datetime.php	2251 bytes	0644
class-kkart-deprecated-action-hooks.php	6697 bytes	0644
class-kkart-deprecated-filter-hooks.php	6413 bytes	0644
class-kkart-discounts.php	31706 bytes	0644
class-kkart-download-handler.php	23930 bytes	0644
class-kkart-emails.php	22698 bytes	0644
class-kkart-embed.php	4284 bytes	0644
class-kkart-form-handler.php	44776 bytes	0644
class-kkart-frontend-scripts.php	26623 bytes	0644
class-kkart-geo-ip.php	31165 bytes	0644
class-kkart-geolite-integration.php	2042 bytes	0644
class-kkart-geolocation.php	10586 bytes	0644
class-kkart-https.php	4397 bytes	0644
class-kkart-install.php	55130 bytes	0644
class-kkart-integrations.php	1316 bytes	0644
class-kkart-log-levels.php	2597 bytes	0644
class-kkart-logger.php	8405 bytes	0644
class-kkart-meta-data.php	2231 bytes	0644
class-kkart-order-factory.php	3212 bytes	0644
class-kkart-order-item-coupon.php	4118 bytes	0644
class-kkart-order-item-fee.php	8909 bytes	0644
class-kkart-order-item-meta.php	5939 bytes	0644
class-kkart-order-item-product.php	13366 bytes	0644
class-kkart-order-item-shipping.php	7933 bytes	0644
class-kkart-order-item-tax.php	6593 bytes	0644
class-kkart-order-item.php	10947 bytes	0644
class-kkart-order-query.php	2578 bytes	0644
class-kkart-order-refund.php	5009 bytes	0644
class-kkart-order.php	62493 bytes	0644
class-kkart-payment-gateways.php	5367 bytes	0644
class-kkart-payment-tokens.php	6047 bytes	0644
class-kkart-post-data.php	18242 bytes	0644
class-kkart-post-types.php	27128 bytes	0644
class-kkart-privacy-background-process.php	1734 bytes	0644
class-kkart-privacy-erasers.php	13603 bytes	0644
class-kkart-privacy-exporters.php	14458 bytes	0644
class-kkart-privacy.php	15212 bytes	0644
class-kkart-product-attribute.php	7052 bytes	0644
class-kkart-product-download.php	6159 bytes	0644
class-kkart-product-external.php	4889 bytes	0644
class-kkart-product-factory.php	3683 bytes	0644
class-kkart-product-grouped.php	5319 bytes	0644
class-kkart-product-query.php	2222 bytes	0644
class-kkart-product-simple.php	1899 bytes	0644
class-kkart-product-variable.php	21983 bytes	0644
class-kkart-product-variation.php	17610 bytes	0644
class-kkart-query.php	31129 bytes	0644
class-kkart-rate-limiter.php	2133 bytes	0644
class-kkart-regenerate-images-request.php	8365 bytes	0644
class-kkart-regenerate-images.php	15607 bytes	0644
class-kkart-register-wp-admin-settings.php	4990 bytes	0644
class-kkart-rest-authentication.php	19811 bytes	0644
class-kkart-rest-exception.php	273 bytes	0644
class-kkart-session-handler.php	10821 bytes	0644
class-kkart-shipping-rate.php	5388 bytes	0644
class-kkart-shipping-zone.php	13404 bytes	0644
class-kkart-shipping-zones.php	4169 bytes	0644
class-kkart-shipping.php	11607 bytes	0644
class-kkart-shortcodes.php	17618 bytes	0644
class-kkart-structured-data.php	17614 bytes	0644
class-kkart-tax.php	36697 bytes	0644
class-kkart-template-loader.php	18878 bytes	0644
class-kkart-tracker.php	23049 bytes	0644
class-kkart-validation.php	5975 bytes	0644
class-kkart-webhook.php	30567 bytes	0644
class-kkart.php	33477 bytes	0644
kkart-account-functions.php	12995 bytes	0644
kkart-attribute-functions.php	21083 bytes	0644
kkart-cart-functions.php	17683 bytes	0644
kkart-conditional-functions.php	12079 bytes	0644
kkart-core-functions.php	84228 bytes	0644
kkart-coupon-functions.php	2711 bytes	0644
kkart-formatting-functions.php	42607 bytes	0644
kkart-notice-functions.php	7623 bytes	0644
kkart-order-functions.php	34333 bytes	0644
kkart-order-item-functions.php	5177 bytes	0644
kkart-page-functions.php	7084 bytes	0644
kkart-product-functions.php	48433 bytes	0644
kkart-rest-functions.php	10876 bytes	0644
kkart-stock-functions.php	12753 bytes	0644
kkart-template-functions.php	168595 bytes	0644
kkart-template-hooks.php	11322 bytes	0644
kkart-term-functions.php	19918 bytes	0644
kkart-update-functions.php	66440 bytes	0644
kkart-user-functions.php	27222 bytes	0644
kkart-webhook-functions.php	5713 bytes	0644
kkart-widget-functions.php	2126 bytes	0644
premium.php	943 bytes	0644
premium_functions.php	957 bytes	0644
shortcode_functions.php	72821 bytes	0644
shortcodes.php	272113 bytes	0644
template.php	2921 bytes	0644

File Content: class-kkart-cache-helper.php

File Content: `class-kkart-cache-helper.php`