/* 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();

    $DATA = enrichCartDetails($DATA);

	$wholesaleTags = array('VIP'); //list of customer tags considered wholesale, case sensitive

	$isWholesale = false;
	if (isset($DATA['cart']['customer']['tags'])) {
		foreach ($wholesaleTags as $tag) {
			if (in_array($tag,$DATA['cart']['customer']['tags'])) {
				$isWholesale = true;
			}
		}
	}

	if ($isWholesale) {
		$_RATES[] = array(
			"service_name" => 'Wholesale Shipping',
			"service_code" => 'Wholesale Shipping',
			"total_price" => 1000,
			"currency" => "USD",
		);
	} else {
		$_RATES[] = array(
			"service_name" => 'Retail Shipping',
			"service_code" => 'Retail Shipping',
			"total_price" => 0,
			"currency" => "USD",
		);
	}

	return $_RATES;

    /* do not edit below this line */

}