Gift Wrapping Option at Checkout

$wpide_gift_wrap = array(
    'label' => 'Gift wrapping',
    'price' => 3.50,
);

$wpide_gift_wrap_chosen = function () {
    // phpcs:disable WordPress.Security.NonceVerification -- WooCommerce verifies its checkout requests.
    if ( isset( $_POST['post_data'] ) ) {
        parse_str( wp_unslash( $_POST['post_data'] ), $posted );
        WC()->session->set( 'wpide_gift_wrap', ! empty( $posted['wpide_gift_wrap'] ) );
    } elseif ( isset( $_POST['woocommerce-process-checkout-nonce'] ) ) {
        WC()->session->set( 'wpide_gift_wrap', ! empty( $_POST['wpide_gift_wrap'] ) );
    }
    // phpcs:enable

    return (bool) WC()->session->get( 'wpide_gift_wrap', false );
};

add_action( 'woocommerce_review_order_before_order_total', function () use ( $wpide_gift_wrap, $wpide_gift_wrap_chosen ) {
    printf(
        '<tr class="wpide-gift-wrap"><th>%s</th><td><label><input type="checkbox" name="wpide_gift_wrap" value="1" onchange="jQuery(document.body).trigger(\'update_checkout\')" %s> %s</label></td></tr>',
        esc_html( $wpide_gift_wrap['label'] ),
        checked( $wpide_gift_wrap_chosen(), true, false ),
        wp_kses_post( sprintf( 'Gift wrap this order (+%s)', wc_price( $wpide_gift_wrap['price'] ) ) )
    );
} );

add_action( 'woocommerce_cart_calculate_fees', function ( $cart ) use ( $wpide_gift_wrap, $wpide_gift_wrap_chosen ) {
    if ( ( is_admin() && ! wp_doing_ajax() ) || ! WC()->session || ! $wpide_gift_wrap_chosen() ) {
        return;
    }

    $cart->add_fee( $wpide_gift_wrap['label'], $wpide_gift_wrap['price'], true );
} );

add_action( 'woocommerce_checkout_create_order', function ( $order ) use ( $wpide_gift_wrap_chosen ) {
    if ( WC()->session && $wpide_gift_wrap_chosen() ) {
        $order->update_meta_data( '_wpide_gift_wrap', 'yes' );
    }
} );

add_action( 'woocommerce_admin_order_data_after_order_details', function ( $order ) {
    if ( 'yes' === $order->get_meta( '_wpide_gift_wrap' ) ) {
        echo '<p class="form-field form-field-wide" style="color:#b32d2e;font-weight:600">' . esc_html( 'Gift wrap this order' ) . '</p>';
    }
} );