在 WooCommerce 中以编程方式应用或删除优惠券后更新总数

问题描述

我创建了一个复选框（它看起来不再像一个复选框），用于在更改时应用/删除优惠券。这很好用。但总不更新申请，页面必须刷新。我已经用其他函数的一些剪切和粘贴来构建这个函数，它曾经是一个无线电场，它可能不是最佳实践。优惠券广告 500 瑞典克朗的折扣。

但是我在使用优惠券后如何重新计算总数？

最后你可以看到，我已经尝试了 WC()->cart->calculate_totals();。

这是网站和结帐处：https://www.klubbtryck.se/nif/kassa/

这是我的代码：

    // Add a custom checkout field
    add_action( 'woocommerce_review_order_after_shipping','checkout_shipping_form_delivery_addition_nifny',20 );

function checkout_shipping_form_delivery_addition_nifny(){
    $domain = 'wocommerce';

    if (  WC()->session->get( 'chosen_shipping_methods' )[0] == 'local_pickup:3' ) :

        echo '<tr class="delivery-radio"><th>' . __('Gift Card',$domain) . '</th><td>';

        $chosen = WC()->session->get('chosen_delivery');
        $chosen = empty($chosen) ? WC()->checkout->get_value('delivery') : $chosen;
        $chosen = empty($chosen) ? 0 : $chosen;
        if( $chosen == 1){ $chosen = true; } else { $chosen = false; }

        // Add a custom checkbox field
        woocommerce_form_field( 'radio_delivery',array(
            'type' => 'checkbox','label' => '<label for="radio_delivery" class="checkbox-label"><span class="presentkortbesk">I have a gift card</span><span class="priset">-500kr</span></label>','class' => array( 'form-row-wide' ),'required' => false,//'default' => false,),$chosen );

        echo '</td></tr>';

    endif;
}

// jQuery - Ajax script
add_action( 'wp_footer','checkout_delivery_script_nifny' );
function checkout_delivery_script_nifny() {
    // Only checkout page
    if ( ! is_checkout() ) return;
    ?>
    <script type="text/javascript">
    jQuery( function($){
        if (typeof wc_checkout_params === 'undefined')
            return false;

        $('form.checkout').on('change','input[name=radio_delivery]',function(e){
            e.preventDefault();
            var d = $(this).prop('checked') === true ? 1 : 0;
            //var d = $(this).val();
            //alert('value: '+d);
            $.ajax({
                type: 'POST',url: wc_checkout_params.ajax_url,data: {
                    'action': 'delivery','delivery': d,},success: function (result) {
                    $('body').trigger('update_checkout');
                    //console.log(result); // just for testing | TO BE REMOVED
                },error: function(error){
                    //console.log(error); // just for testing | TO BE REMOVED
                }
            });
        });
    });
    </script>
    <?php

}

// Get Ajax request and saving to WC session
add_action( 'wp_ajax_delivery','wc_get_delivery_ajax_data_nifny' );
add_action( 'wp_ajax_nopriv_delivery','wc_get_delivery_ajax_data_nifny' );
function wc_get_delivery_ajax_data_nifny() {
    if ( isset($_POST['delivery']) ){
        WC()->session->set('chosen_delivery',sanitize_key( $_POST['delivery'] ) );
        echo json_encode( $delivery ); // Return the value to jQuery
    }
    die();
}

// Add a custom dynamic delivery fee
add_action( 'woocommerce_cart_calculate_fees','add_packaging_fee_nifny',20,1 );
function add_packaging_fee_nifny( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    // Only for targeted shipping method
    if (  WC()->session->get( 'chosen_shipping_methods' )[0] != 'local_pickup:3' )
        return;

    if( WC()->session->get( 'chosen_delivery' ) == 1 ){
        if (!in_array('nynashamn2020',WC()->cart->get_applied_coupons())) {
                WC()->cart->apply_coupon('card2020');
                //WC()->cart->calculate_totals();
            }
    } else {
        if (in_array('nynashamn2020',WC()->cart->get_applied_coupons())) {
            WC()->cart->remove_coupon('card2020');
        }
    }
}

解决方法

您应该将仅用于费用的 woocommerce_cart_calculate_fees 钩子替换为类似 woocommerce_before_calculate_totals 更合适的钩子，如下所示：

// Add a custom dynamic delivery fee
add_action( 'woocommerce_before_calculate_totals','add_packaging_fee_nifny' );
function add_packaging_fee_nifny( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    // Only for targeted shipping method
    if (  WC()->session->get( 'chosen_shipping_methods' )[0] != 'local_pickup:3' )
        return;

    if( WC()->session->get( 'chosen_delivery' ) == 1 ){
        if (!in_array('nynashamn2020',WC()->cart->get_applied_coupons())) {
                WC()->cart->apply_coupon('card2020');
                //WC()->cart->calculate_totals();
            }
    } else {
        if (in_array('nynashamn2020',WC()->cart->get_applied_coupons())) {
            WC()->cart->remove_coupon('card2020');
        }
    }
}

代码位于活动子主题（或活动主题）的functions.php 文件中。效果应该会更好。