public static function initPricesComputation($customer_id = null)
{
if ($customer_id) {
$customer = new JeproshopCustomerModelCustomer((int) $customer_id);
if (!JeproshopTools::isLoadedObject($customer, 'customer_id')) {
die(Tools::displayError());
}
self::$_taxCalculationMethod = JeproshopGroupModelGroup::getPriceDisplayMethod((int) $customer->default_group_id);
$cur_cart = JeproshopContext::getContext()->cart;
$address_id = 0;
if (JeproshopTools::isLoadedObject($cur_cart, 'cart_id')) {
$address_id = (int) $cur_cart->{JeproshopSettingModelSetting::getValue('tax_address_type')};
}
$address_info = JeproshopAddressModelAddress::getCountryAndState($address_id);
if (self::$_taxCalculationMethod != COM_JEPROSHOP_TAX_EXCLUDED && !empty($address_info->vat_number) && $address_info->country_id != JeproshopSettingModelSetting::getValue('country_vat_number') && JeproshopSettingModelSetting::getValue('vat_number_management')) {
self::$_taxCalculationMethod = COM_JEPROSHOP_TAX_EXCLUDED;
}
} else {
self::$_taxCalculationMethod = JeproshopGroupModelGroup::getPriceDisplayMethod(JeproshopGroupModelGroup::getCurrent()->group_id);
}
}
