/* 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();

	//uses Australia Post's Digital Services API
	$startrack_account = '';
	$startrack_api_key = '';
	$startrack_api_password = '';

	$w = 0;
	foreach ($DATA['items'] as $i) {
		$w += $i['quantity']*($i['grams']/1000);
	}

	//dimensions to 1 decimal place only
	$packages = array(
		array('weight'=>$w, 'length'=>12, 'width'=>8.7, 'height'=>6),
	);

	//postcode and city MUST be valid in order for rates to return
	$startrack = new AustPostEParcelAPI($startrack_account,$startrack_api_key,$startrack_api_password);
	$startrack->setOrigin($DATA['origin']['province'],$DATA['origin']['postal_code'],$DATA['origin']['country'],$DATA['origin']['city']);
	$startrack->setDestination($DATA['destination']['province'],$DATA['destination']['postal_code'],$DATA['destination']['country'],$DATA['destination']['city']);
	$r = $startrack->getRate($packages);
	if ($r) {
		foreach ($r as $_r) {
			$_RATES[] = array(
				"service_name" => $_r['name'],
				"service_code" => $_r['code'],
				"total_price" => $_r['amount']*100,
				"currency" => "AUD",
			);
		}
	}

	return $_RATES;

	/* do not edit below this line */

}