/**
* Add the taxation information to the google object representation of the customers cart
*
* @return void
**/
private function AddTaxInformationToCart()
{
require_once dirname(__FILE__).'/library/googletax.php';
// Fetch available tax classes
$taxClasses = getClass('ISC_TAX')->getTaxClasses();
foreach($taxClasses as $id => $name) {
$taxClasses[$id] = array(
'name' => $name,
'rules' => array()
);
}
$taxClassIds = array_keys($taxClasses);
// Fetch available tax zones
$taxZones = array();
$query = "
SELECT id, type, `default`
FROM [|PREFIX|]tax_zones
WHERE enabled=1 OR `default`=1
";
$result = $GLOBALS['ISC_CLASS_DB']->query($query);
while($taxZone = $GLOBALS['ISC_CLASS_DB']->fetch($result)) {
$taxClasses[$id]['rules'] = array();
$shippingTaxRate = getClass('ISC_TAX')->getEffectiveClassRate($taxZone['id'], getConfig('taxShippingTaxClass'));
$shippingTaxed = 'false';
if($shippingTaxRate > 0) {
$shippingTaxed = 'true';
}
$defaultTaxRate = getClass('ISC_TAX')->getEffectiveClassRate($taxZone['id'], 0) / 100;
$defaultTaxRule = new GoogleDefaultTaxRule($defaultTaxRate, $shippingTaxed);
foreach($taxClassIds as $id) {
$taxRate = getClass('ISC_TAX')->getEffectiveClassRate($taxZone['id'], $id) / 100;
$taxClasses[$id]['rules'][$taxZone['id']] = new GoogleAlternateTaxRule($taxRate);
}
// Everywhere else tax zone - allow everywhere
if($taxZone['default']) {
$defaultTaxRule->setWorldArea(true);
foreach($taxClassIds as $id) {
$taxClasses[$id]['rules'][$taxZone['id']]->setWorldArea(true);
}
}
// Location specific zone, so the tax becomes dependant on configured locations
else {
$zipPatterns = array();
$stateCodes = array();
$query = "
SELECT *
FROM [|PREFIX|]tax_zone_locations
WHERE tax_zone_id='".$taxZone['id']."'
";
$locationResult = $GLOBALS['ISC_CLASS_DB']->query($query);
while($location = $GLOBALS['ISC_CLASS_DB']->fetch($locationResult)) {
if($location['type'] == 'country') {
$countryIso = getCountryISO2ById($location['value_id']);
$defaultTaxRule->addPostalArea($countryIso);
foreach($taxClassIds as $id) {
$taxClasses[$id]['rules'][$taxZone['id']]->addPostalArea($countryIso);
}
}
else if($location['type'] == 'zip') {
$countryIso = getCountryISO2ById($location['country_id']);
// US zip codes are handled with setZipPatterns below
if($countryIso == 'US') {
$zipPatterns[] = $location['value'];
}
else {
$defaultTaxRule->addPostalArea($countryIso, $location['value']);
foreach($taxClassIds as $id) {
$taxClasses[$id]['rules'][$taxZone['id']]->addPostalArea($countryIso, $location['value']);
}
}
}
else if($location['type'] == 'state') {
$countryIso = getCountryISO2ById($location['country_id']);
// Google Checkout only supports US based states
// Ref: http://code.google.com/apis/checkout/developer/Google_Checkout_XML_API_Understanding_Areas.html
if($countryIso != 'US') {
continue;
}
$stateCodes[] = getStateISO2ById($location['value_id']);
}
}
}
$this->cart->addDefaultTaxRules($defaultTaxRule);
// Add in the US zip codes if there are any
if(!empty($zipPatterns)) {
$defaultTaxRule->setZipPatterns($zipPatterns);
foreach($taxClassIds as $id) {
$taxClasses[$id]['rules'][$taxZone['id']]->setZipPatterns($zipPatterns);
}
}
// Add in US states if there are any
if(!empty($stateCodes)) {
$defaultTaxRule->setStateAreas($stateCodes);
foreach($taxClassIds as $id) {
$taxClasses[$id]['rules'][$taxZone['id']]->setStateAreas($stateCodes);
}
}
}
foreach($taxClasses as $id => $taxClass) {
$table = new GoogleAlternateTaxTable($id);
foreach($taxClass['rules'] as $rule) {
$table->addAlternateTaxRules($rule);
}
$this->cart->addAlternateTaxTables($table);
}
}
