Call a custom user field value in a WooCommerce hooked function - php

Question

I have created a custom field in the user profile, now I need to call the value of that field into the WooCommerce cart as a discount.
This is the function to add a custom fee in the cart:
add_action('woocommerce_cart_calculate_fees' , 'add_custom_fees');
$descuentototal = get_the_author_meta( 'descuento', $user_id );
function add_custom_fees( WC_Cart $cart ){
if( $descuentototal < 1 ){
return;
}
// Calculate the amount to reduce
$cart->add_fee( 'Discount: ', -$descuentototal);
}
But can't manage to get the value of 'descuento'.
How could I do it?
Thanks.

Answer 1

You need to use WordPress functions get_current_user_id() to get current user Id and get_user_meta() to get the user meta data.
So the correct code for woocommerce_cart_calculate_fees hook will be:
add_action( 'woocommerce_cart_calculate_fees', 'add_custom_fees' );
function add_custom_fees(){
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
if ( !is_user_logged_in() )
return;
$user_id = get_current_user_id();
$descuentototal = get_user_meta($user_id, 'descuento', true);
if ( $descuentototal < 1 ) {
return;
} else {
$descuentototal *= -1;
// Enable translating 'Discount: '
$discount = __('Discount: ', 'woocommerce');
// Calculate the amount to reduce (without taxes)
WC()->cart->add_fee( $discount, $descuentototal, false );
}
}
Code goes in any php file of your active child theme (or theme) or also in any plugin php files.
Reference or related:
Wordpress Function Reference/get user meta
WooCommerce - Conditional Progressive Discount based on number of items in cart
WooCommerce class - WC_Cart - add_fee() method