hnb

$transient = get_transient( 'hnb_rate' );
if ( empty( $transient ) ){

add_filter('woocommerce_paypal_args', 'convert_hrk_to_eur');
function get_currency() {
    $url = "http://hnbex.eu/api/v1/rates/daily/";

    $json =  wp_remote_fopen($url);
    $rates = json_decode($json);

    foreach ($rates as $rate) {
        if ($rate->currency_code == "EUR") {
            return $rate->median_rate;
        }
    }

    trigger_error("No exchange rate available", E_USER_ERROR);
}
set_transient('hnb_rate', $data, 60*60*12 );
}
add_filter( 'woocommerce_paypal_supported_currencies', 'add_hrk_paypal_valid_currency' );
    function add_hrk_paypal_valid_currency( $currencies ) {
     array_push ( $currencies , 'HRK' );
     return $currencies;
    }
add_filter('woocommerce_paypal_args', 'convert_hrk_to_eur');

function convert_hrk_to_eur($paypal_args){
    if ( $paypal_args['currency_code'] == 'HRK'){
    $convert_rate = get_currency();
    $paypal_args['currency_code'] = 'EUR';
        $i = 1;

        while (isset($paypal_args['amount_' . $i])) {
            $paypal_args['amount_' . $i] = round( $paypal_args['amount_' . $i] / $convert_rate, 2);
            ++$i;
        }

        if ( $paypal_args['discount_amount_cart'] > 0 ) {
            $paypal_args['discount_amount_cart'] = round( $paypal_args['discount_amount_cart'] / $convert_rate, 2);
        }
        }

return $paypal_args;