Make taxable a WooCommerce custom fee based on payment gateway and country - php

Question

This code adds a fee of 29 when PayPal is selected on checkout page for a defined country. However, it's not being taxed. The total tax right now is based on items + shipping.
How would I go about to add tax to the custom fee without double taxing people?
This is my code:
function woocommerce_custom_fee( ) {
global $woocommerce;
$county = array('SE');
if ( ( is_admin() && ! defined( 'DOING_AJAX' ) ) || ! is_checkout() )
return;
$chosen_gateway = $woocommerce->session->chosen_payment_method ;
$fee = 29;
if ( $chosen_gateway == 'paypal' and ( in_array( WC()->customer->get_shipping_country(), $county ) ) ) { //test with paypal method
$woocommerce->cart->add_fee( 'Paypal Avgift', $fee, false, '' );
}
}
add_action( 'woocommerce_cart_calculate_fees','woocommerce_custom_fee' );
function cart_update_script() {
if (is_checkout()) :
?>
<script>
jQuery( function( $ ) {
// woocommerce_params is required to continue, ensure the object exists
if ( typeof woocommerce_params === 'undefined' ) {
return false;
}
$checkout_form = $( 'form.checkout' );
$checkout_form.on( 'change', 'input[name="payment_method"]', function() {
$checkout_form.trigger( 'update' );
});
});
</script>
<?php
endif;
}
add_action( 'wp_footer', 'cart_update_script', 999 );
Thanks

Answer 1

To enable Tax in WC_Cart add_fee() method, you need to set the third argument to true.
You can remove the last argument as it is already the default value.
In woocommerce_cart_calculate_fees action hook you can use directly the cart object argument $cart_obj that is include in it.
Also global $woocommerce has been replaced by WC() object which include it (so no need anymore to declare global $woocommerce.
Below I have clean and reordered your first hooked function, try it (it will act as yours, and fee will be taxable):
add_action( 'woocommerce_cart_calculate_fees','conditional_payment_mothod_custom_fee', 10, 1 );
function conditional_payment_mothod_custom_fee( $cart_obj ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) || ! is_checkout() )
return;
$fee = 19;
$target_county = 'SE';
$chosen_gateway = WC()->session->chosen_payment_method;
$shipping_country = WC()->customer->get_shipping_country();
// Enabling fee with paypal method (and 'SE' country)
if('paypal' == $chosen_gateway && $shipping_country == $target_county)
$cart_obj->add_fee( __('Paypal Avgift'), $fee, true ); // Tax enabled for the fee
}
Here $cart_obj act just as $woocommerce->cart or WC()->cart
Now in your second function, you can use the jQuery shortcut change() and you can make your code more modern and compact, this way:
add_action( 'wp_footer', 'checkout_update_script', 999 );
function checkout_update_script() {
if ( is_checkout() ) :
?>
<script>
jQuery( function($){
// Checking that the variable "woocommerce_params" is defined to continue
if ( 'undefined' === typeof woocommerce_params )
return false;
$('form.checkout').change('input[name="payment_method"]', function(){
$(this).trigger( 'update' );
});
});
</script>
<?php
endif;
}
Code goes in function.php file of your active child theme (or theme) or also in any plugin file.
This code is tested and works on WooCommerce versions 2.6.x and 3.0+