/* This macro will be parsed as PHP code (see http://www.php.net)

The calculateshipping function is called every time a shipping calculation request is made by Shopify.

The function must return an array of available shipping options, otherwise no shipping options will be returned to your customers.
*/
function calculateshipping($DATA) {

    /* do not edit above this line */

    $_RATES = array();

    //calculate total weight
    $w = 0;
    foreach ($DATA['items'] as $i) {
        $w += $i['quantity']*$i['grams']/1000;
    }
    $w = $w*2.20462; //in pounds

    //pull from UPS
    $isresidential = true;
    if ($DATA['destination']['company_name'] !== null && $DATA['destination']['company_name'] != '') $isresidential = false;

	$_PUROLATOR_ACCOUNT = 'YOUR_ACCOUNT_NUMBER';
	$_PUROLATOR_KEY = 'YOUR_CORPORATE_KEY';
	$_PUROLATOR_PASS = 'YOUR_PASSWORD';

    $packages = array(
        array('weight'=>$w, 'length'=>5, 'width'=>5, 'height'=>5),
    );

	$pu = new PurolatorAPI($_PUROLATOR_ACCOUNT,$_PUROLATOR_KEY,$_PUROLATOR_PASS);
	$pu->setOrigin($DATA['origin']['city'],$DATA['origin']['province'],$DATA['origin']['postal_code'],$DATA['origin']['country']);
	$pu->setDestination($DATA['destination']['city'],$DATA['destination']['province'],$DATA['destination']['postal_code'],$DATA['destination']['country']);
    $r = $pu->getRate($packages);
	if ($r) {
		foreach ($r as $_r) {
			$_RATES[] = array(
				"service_name" => $_r['name'],
				"service_code" => $_r['code'],
				"total_price" => $_r['amount']*100, //in cents
				"currency" => "USD",
			);
		}
	}

    return $_RATES;

    /* do not edit below this line */

}