static function getSingpostInternationalFormula($params, $controller, $shippingMethod, $shippingCountry, $shippingCity)
{
$formula = function ($n, $items, $cart, $controller) use($shippingCountry) {
$weight = Helper_Cart::getTotalWeightOfItems($items);
$zone = Helper_Cart::_getSingpostZoneFromCountry($shippingCountry);
$fee = 0;
if ($zone == 'zone1') {
$steps = array(20 => 0.5, 50 => 0.7, 100 => 1.1);
foreach ($steps as $step => $val) {
if ($weight <= $step) {
$fee = $val;
break;
}
}
if (!$fee) {
$fee = 1.1 + ceil(($weight - 100) / 100) * 1.1;
}
} else {
if ($zone == 'zone2') {
if ($weight <= 20) {
$fee = 0.7;
}
if (!$fee) {
$fee = 0.7 + ceil(($weight - 20) / 10) * 0.25;
}
} else {
if ($weight <= 20) {
$fee = 1.3;
}
if (!$fee) {
$fee = 1.3 + ceil(($weight - 20) / 10) * 0.35;
}
}
}
return 2.2 + $fee;
};
return $formula;
}
