How to switch currency programatically using WooCommerce Multilingual & Multicurrency plugin - wordpress

Question

I need to be able to switch currency on WooCommerce site by adding specific link. On client's site is installed WooCommerce Multilingual & Multicurrency by OnTheGoSystems.
I have something like this at the moment:
add_filter( 'wcml_client_currency', 'abc_client_currency' );
function abc_client_currency( $currency ) {
if( !empty( $_GET['country'] ) ) {
switch ( $_GET['country']) {
case 'US':
$new_currency = 'USD';
break;
case 'PL':
$new_currency = 'PLN';
break;
default:
$new_currency = 'EUR';
break;
}
$settings = get_option( '_wcml_settings' );
$currencies = $settings['currency_options'];
$currency_codes = array_keys( $currencies );
if( in_array( $new_currency, $currency_codes ) ) {
return $new_currency;
}
}
return $currency;
}
It works on the very first pageload (as long as there is ?contry=XY in url). I know I could possibly save currency into a cookie/session and keep using this method, but that doesn't seam right. I would like to properly switch the currency.

Answer 1

Assuming you have some sort of dropdown list for selecting between currencies:
<ul id="curr_switcher">
<li class="country" data-country="US">USD</li>
<li class="country" data-country="PL">PLN</li>
<li class="country" data-country="FR">EUR</li>
</ul>
I'd use some simple jQuery hooked to the wp_footer action (NOT wp_head as jQuery will likely not be loaded yet) to redirect to the same page/location with correct variable on user click - just hook it to wp_footer action to load on all front-end pages :
<?php
add_action('wp_footer', function () { ?>
<script>
jQuery(document).ready(function($) {
// .country on click
$('.country').click(function(e) {
// prevent default behaviour
e.preventDefault();
// retrieve country code
var country = $(this).data('country');
// retrieve current location pathname
var current_loc_path = window.location.pathname;
// append currency argument to pathname
var new_loc_path = current_loc_path + '/?country=' + country;
// use location replace to redirect page with correctly appended currency as argument
window.location.replace(new_loc_path);
});
});
</script>
<?php }); ?>
So in a nutshell you're retrieving the current browser window location path, appending the selected country to that path on click, and then basically reloading the page (technically a full redirect, but let's not split hairs here).
Note that this is probably not the most "technically correct" way of doing it - there are probably other way more involved ways of achieving the same thing - but my tendency is always towards finding the simplest solution, as long as it works and your code is properly commented for future reference!
Note also: this will likely not work past the current page - probably a good idea to append the country argument to all links you wish to load the correct currency for.
Hopefully the above get you started in the right direction.