Show/hide shipping methods based on a WooCommerce checkout field value - php

Question

In WooCommerce, I have set different shipping methods, but one in particular must be exclusive for companies.
For this I am using the following code:
add_filter( 'woocommerce_package_rates', array( $this, 'package_rates' ), 10, 2 );
public function package_rates( $rates, $package ) {
$company_rate_id = 'flat_rate:7';
if(!empty(WC()->customer->get_billing_company())){
$company_rates = $rates[ $company_rate_id ];
$rates = array( $company_rate_id => $company_rates );
}else{
unset( $rates[ $company_rate_id ] );
}
return $rates;
}
The solution works, but only if the billing company already exist and is saved in the database. So if a customer updates this information on the checkout page, it doesn't work.
A possible solution would be to save this field live (billing_company).
I tried the following function:
add_filter( 'woocommerce_checkout_fields' , 'trigger_update_checkout_on_change' );
function trigger_update_checkout_on_change( $fields ) {
$fields['billing']['billing_company']['class'][] = 'update_totals_on_change';
return $fields;
}
This updates the shipping method, the problem is that again, the field is not saved in the database and the package_rates() function can not find it live.

Answer 1

This is a bit more complicated than that… jQuery and Ajax code are required to allow showing/hiding shipping methods based on a checkout field user input.
The following code will enable show/hide pre defined shipping methods based on checkout billing company field:
// Conditionally show/hide shipping methods
add_filter( 'woocommerce_package_rates', 'shipping_package_rates_filter_callback', 100, 2 );
function shipping_package_rates_filter_callback( $rates, $package ) {
// The defined rate id
$company_rate_id = 'flat_rate:7';
if( WC()->session->get('company' ) === '1' ) {
$rates = array( $company_rate_id => $rates[ $company_rate_id ] );
} else {
unset( $rates[ $company_rate_id ] );
}
return $rates;
}
// function that gets the Ajax data
add_action( 'wp_ajax_get_customer_company', 'wc_get_customer_company' );
add_action( 'wp_ajax_nopriv_get_customer_company', 'wc_get_customer_company' );
function wc_get_customer_company() {
if ( isset($_POST['company']) && ! empty($_POST['company']) ){
WC()->session->set('company', '1' );
} else {
WC()->session->set('company', '0' );
}
die(); // (required)
}
// The Jquery Ajax script
add_action( 'wp_footer', 'custom_checkout_script' );
function custom_checkout_script() {
if( WC()->session->__isset('company') )
WC()->session->__unset('company');
// Only on checkout when billing company is not defined
if( is_checkout() && ! is_wc_endpoint_url() ):
?>
<script type="text/javascript">
jQuery( function($){
if (typeof wc_checkout_params === 'undefined')
return false;
var fieldId = 'input#billing_company';
function companyTriggerAjax( company ){
$.ajax({
type: 'POST',
url: wc_checkout_params.ajax_url,
data: {
'action': 'get_customer_company',
'company': company,
},
success: function (result) {
// Trigger refresh checkout
$('body').trigger('update_checkout');
}
});
}
// On start
if( $(fieldId).val() != '' ) {
companyTriggerAjax( $(fieldId).val() );
}
// On change
$(fieldId).change( function () {
companyTriggerAjax( $(this).val() );
});
});
</script>
<?php
endif;
}
// Enabling, disabling and refreshing session shipping methods data
add_action( 'woocommerce_checkout_update_order_review', 'refresh_shipping_methods', 10, 1 );
function refresh_shipping_methods( $post_data ){
$bool = true;
if ( WC()->session->get('company' ) === '1' )
$bool = false;
// Mandatory to make it work with shipping methods
foreach ( WC()->cart->get_shipping_packages() as $package_key => $package ){
WC()->session->set( 'shipping_for_package_' . $package_key, $bool );
}
WC()->cart->calculate_shipping();
}
Code goes in function.php file of your active child theme (or active theme). Tested and works.
Related: Remove shipping cost if custom checkbox is checked in WooCommerce Checkout