问WooCommerce -修改后的购物车重量不影响运输成本

EN

add_filter( 'woocommerce_cart_contents_weight', 'filter_wc_cart_contents_weight', 10000 );
function filter_wc_cart_contents_weight( $weight ) {
    $condition    = true; // Only for testing
    $extra_weight = 1.5;

    // Loop through cart items
    foreach(WC()->cart->get_cart() as $cart_item ) {
        $quantity = $cart_item['quantity']; // If needed

        if( $condition ) {
            $weight += $extra_weight;
        }
    }
    return $weight;
}

// For testing: display the total weight after order total in cart page (Ajax updated)
add_action( 'woocommerce_cart_totals_after_order_total', 'display_wc_cart_total_weight_after_order_total' );
function display_wc_cart_total_weight_after_order_total() {
    ?>
    <tr class="order-total">
        <th><?php esc_html_e( 'Total weight', 'woocommerce' ); ?></th>
        <td data-title="<?php esc_attr_e( 'Total weight', 'woocommerce' ); ?>"><?php echo wc_format_weight( WC()->cart->get_cart_contents_weight() ); ?></td>
    </tr>
    <?php
}

add_action( 'woocommerce_before_calculate_totals', 'conditionally_change_tax_class', 10000 );
function conditionally_change_tax_class( $cart ){
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    // Required since Woocommerce version 3.2 for cart items properties changes
    if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;

    $condition    = true; // Only for testing
    $extra_weight = 1.5;

    // Looo through our specific cart item keys
    foreach ( $cart->get_cart() as $cart_item ) {
        // get product weight
        $weight = (float) $cart_item['data']->get_weight();

        // Set the new product weight
        $cart_item['data']->set_weight( $weight + ( $extra_weight / $cart_item['quantity'] ) );
    }
}

// For testing display the total weight after order total
add_action( 'woocommerce_cart_totals_after_order_total', 'display_wc_cart_total_weight_after_order_total' );
function display_wc_cart_total_weight_after_order_total() {
    ?>
    <tr class="order-total">
        <th><?php esc_html_e( 'Total weight', 'woocommerce' ); ?></th>
        <td data-title="<?php esc_attr_e( 'Total weight', 'woocommerce' ); ?>"><?php echo wc_format_weight( WC()->cart->get_cart_contents_weight() ); ?></td>
    </tr>
    <?php
}

add_action( 'woocommerce_checkout_update_order_review', 'conditionally_change_tax_class', 10000 );