public static function initPricesComputation($id_customer = null)
{
if ($id_customer) {
$customer = new Customer((int) $id_customer);
if (!Validate::isLoadedObject($customer)) {
die(Tools::displayError());
}
self::$_taxCalculationMethod = Group::getPriceDisplayMethod((int) $customer->id_default_group);
$cur_cart = Context::getContext()->cart;
$id_address = 0;
if (Validate::isLoadedObject($cur_cart)) {
$id_address = (int) $cur_cart->{Configuration::get('PS_TAX_ADDRESS_TYPE')};
}
$address_infos = Address::getCountryAndState($id_address);
if (self::$_taxCalculationMethod != PS_TAX_EXC && !empty($address_infos['vat_number']) && $address_infos['id_country'] != Configuration::get('VATNUMBER_COUNTRY') && Configuration::get('VATNUMBER_MANAGEMENT')) {
self::$_taxCalculationMethod = PS_TAX_EXC;
}
} else {
self::$_taxCalculationMethod = Group::getPriceDisplayMethod(Group::getCurrent()->id);
}
}
