function calculate_tax_deduction($amount, $od_amount, $method, $finalise = false)
{
global $order;
$tax_address = zen_get_tax_locations();
switch ($method) {
case 'Standard':
if ($amount == 0) {
$ratio1 = 0;
} else {
$ratio1 = zen_round($od_amount / $amount, 2);
}
$tod_amount = 0;
reset($order->info['tax_groups']);
while (list($key, $value) = each($order->info['tax_groups'])) {
$tax_rate = zen_get_tax_rate_from_desc($key, $tax_address['country_id'], $tax_address['zone_id']);
$total_net += $tax_rate * $value;
}
if ($od_amount > $total_net) {
$od_amount = $total_net;
}
reset($order->info['tax_groups']);
while (list($key, $value) = each($order->info['tax_groups'])) {
$tax_rate = zen_get_tax_rate_from_desc($key, $tax_address['country_id'], $tax_address['zone_id']);
$net = $tax_rate * $value;
if ($net > 0) {
$god_amount = $value * $ratio1;
$tod_amount += $god_amount;
if ($finalise) {
$order->info['tax_groups'][$key] = $order->info['tax_groups'][$key] - $god_amount;
}
}
}
if ($finalise) {
$order->info['tax'] -= $tod_amount;
}
if ($finalise) {
$order->info['total'] -= $tod_amount;
}
break;
case 'Credit Note':
$tax_rate = zen_get_tax_rate($this->tax_class, $tax_address['country_id'], $tax_address['zone_id']);
$tax_desc = zen_get_tax_description($this->tax_class, $tax_address['country_id'], $tax_address['zone_id']);
$tod_amount = $this->deduction / (100 + $tax_rate) * $tax_rate;
if ($finalise) {
$order->info['tax_groups'][$tax_desc] -= $tod_amount;
}
if ($finalise) {
$order->info['tax'] -= $tod_amount;
}
if ($finalise) {
$order->info['total'] -= $tod_amount;
}
break;
default:
}
return zen_round($tod_amount, 2);
}
function process()
{
global $order, $currencies, $db;
$od_amount = $this->calculate_deductions($this->get_order_total());
$this->deduction = $od_amount['total'];
if ($od_amount['total'] > 0) {
while (list($key, $value) = each($order->info['tax_groups'])) {
$tax_rate = zen_get_tax_rate_from_desc($key);
if ($od_amount[$key]) {
$order->info['tax_groups'][$key] -= $od_amount[$key];
$order->info['total'] -= $od_amount[$key];
}
}
if ($od_amount['type'] == 'S') {
$order->info['shipping_cost'] = 0;
}
$sql = "select coupon_code from " . TABLE_COUPONS . " where coupon_id = '" . $_SESSION['cc_id'] . "'";
$zq_coupon_code = $db->Execute($sql);
$this->coupon_code = $zq_coupon_code->fields['coupon_code'];
$order->info['total'] = $order->info['total'] - $od_amount['total'];
$this->output[] = array('title' => $this->title . ': ' . '<a href="javascript:couponpopupWindow(\'' . zen_href_link(FILENAME_POPUP_COUPON_HELP, 'cID=' . $_SESSION['cc_id']) . '\')">' . $this->coupon_code . '</a> :', 'text' => '-' . $currencies->format($od_amount['total']), 'value' => $od_amount['total']);
}
}
function process()
{
global $order, $currencies, $gBitDb;
if ($od_amount = $this->calculate_deductions($this->get_order_total())) {
$this->deduction = $od_amount['total'];
if ($od_amount['total'] > 0) {
while (list($key, $value) = each($order->info['tax_groups'])) {
$tax_rate = zen_get_tax_rate_from_desc($key);
if (!empty($od_amount[$key])) {
$order->info['tax_groups'][$key] -= $od_amount[$key];
$order->info['total'] -= $od_amount[$key];
}
}
if (!empty($od_amount['type']) && $od_amount['type'] == 'S') {
$order->info['shipping_cost'] = 0;
}
$sql = "select coupon_code from " . TABLE_COUPONS . " where coupon_id = '" . $_SESSION['cc_id'] . "'";
$zq_coupon_code = $gBitDb->Execute($sql);
$this->coupon_code = $zq_coupon_code->fields['coupon_code'];
$order->info['total'] = $order->info['total'] - $od_amount['total'];
$this->output[] = array('title' => $this->title . ': ' . $this->coupon_code . ' :', 'text' => '-' . $currencies->format($od_amount['total']), 'value' => $od_amount['total']);
}
}
}
function gross_up($net)
{
global $order;
$gross_up_amt = 0;
reset($order->info['tax_groups']);
while (list($key, $value) = each($order->info['tax_groups'])) {
$tax_rate = zen_get_tax_rate_from_desc($key);
if ($tax_rate > 0) {
$gross_up_amt += round($net * $tax_rate / 100, 2);
}
}
return $gross_up_amt + $net;
}
