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<?php |
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|
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// Ensure the file is not accessed directly. |
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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use Disco\App\Disco; |
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|
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if ( ! function_exists( 'disco_add_free_shipping_rate' ) ) { |
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|
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/** |
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* Add free shipping rate to the package. If any campaign matches, then apply free shipping. |
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* |
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* @param array $rates Array of rates found for the package. |
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* @return array |
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*/ |
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function disco_add_free_shipping_rate( $rates ) { |
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$is_free_shipping = ( new Disco )->apply_free_shipping( WC()->cart ); |
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|
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if ( ! $is_free_shipping ) { |
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return $rates; |
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} |
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|
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foreach ( $rates as $rate_id => $rate ) { |
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if ( 'free_shipping' === $rate->method_id ) { |
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return $rates; |
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} |
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} |
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|
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// If free shipping is not available, override rates with free shipping |
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// TODO: Add Label from campaign |
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$free_shipping_rate = new WC_Shipping_Rate( 'disco_free_shipping', __( 'Free Shipping', 'disco' ), 0, array(), 'disco_free_shipping' ); |
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$rates['disco_free_shipping'] = $free_shipping_rate; |
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|
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return $rates; |
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} |
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|
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add_filter( 'woocommerce_package_rates', 'disco_add_free_shipping_rate', 100, 1 ); |
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} |
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|
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if ( ! function_exists( 'disco_refresh_shipping_cache_on_cart_checkout' ) ) { |
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|
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/** |
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* Force WooCommerce to recalculate shipping rates on the cart and checkout pages. |
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* |
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* Disco adds/removes the disco_free_shipping rate through the |
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* woocommerce_package_rates filter based on the current campaign state, but |
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* WooCommerce caches the calculated package rates in the customer session |
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* keyed by a hash of the cart contents only - campaign state is NOT part of |
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* that hash. So when a campaign is activated or deactivated, an existing |
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* session keeps serving the stale cached rates: a lingering disco_free_shipping |
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* rate after deactivation, or a chosen shipping method that no longer exists, |
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* which makes the shipping options appear hidden or broken until the cart |
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* contents change. |
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* |
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* Clearing this session's cached package rates whenever the cart or checkout |
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* page is viewed forces a fresh calculation that reflects the current campaign |
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* state, for this customer only (no global cache flush). |
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* |
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* @return void |
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*/ |
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function disco_refresh_shipping_cache_on_cart_checkout() { |
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if ( is_admin() || ! function_exists( 'is_cart' ) || ! function_exists( 'WC' ) ) { |
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return; |
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} |
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|
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if ( ! is_cart() && ! is_checkout() ) { |
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return; |
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} |
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|
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$session = WC()->session; |
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$cart = WC()->cart; |
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|
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if ( ! $session instanceof WC_Session || ! $cart instanceof WC_Cart ) { |
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return; |
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} |
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|
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// Invalidate the cached rates for every shipping package in this session. |
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// The package keys match the keys WooCommerce uses when it stores rates |
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// under 'shipping_for_package_{key}', so setting them to false makes |
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// WC_Shipping::calculate_shipping_for_package() recalculate instead of |
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// returning the stale cached rates. |
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foreach ( array_keys( $cart->get_shipping_packages() ) as $package_key ) { |
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$session->set( 'shipping_for_package_' . $package_key, false ); |
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} |
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|
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$cart->calculate_shipping(); |
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} |
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|
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add_action( 'template_redirect', 'disco_refresh_shipping_cache_on_cart_checkout' ); |
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} |
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|
