/**
* Calculates aggregated total amounts
*
* Iterates over the cart items in the contents of the cart
* to calculate aggregated total amounts including the
* subtotal, shipping, tax, discounts and grand total
*
* @since 1.0
*
* @return void
**/
function totals () {
if (!($this->retotal || $this->changed())) return true;
$Totals = new CartTotals();
$this->Totals = &$Totals;
// Setup discount calculator
$Discounts = new CartDiscounts();
// Free shipping until costs are assessed
$this->freeshipping = true;
// Identify downloadable products
$this->downloads();
// If no items are shipped, free shipping is disabled
if (!$this->shipped()) $this->freeshipping = false;
foreach ($this->contents as $key => $Item) {
$Item->retotal();
$Totals->quantity += $Item->quantity;
$Totals->subtotal += $Item->total;
// Reinitialize item discount amounts
$Item->discount = 0;
// Item does not have free shipping,
// so the cart shouldn't have free shipping
if (!$Item->freeshipping) $this->freeshipping = false;
}
// Calculate Shipping
$Shipping = new CartShipping();
if ($this->changed()) {
// Only fully recalculate shipping costs
// if the cart contents have changed
$Totals->shipping = $Shipping->calculate();
// Save the generated shipping options
$this->shipping = $Shipping->options();
} else $Totals->shipping = $Shipping->selected();
// Calculate discounts
$Totals->discount = $Discounts->calculate();
//$this->promotions();
$Totals->discount = ($Totals->discount > $Totals->subtotal)?$Totals->subtotal:$Totals->discount;
// Calculate taxes
$Tax = new CartTax();
$Totals->taxrate = $Tax->rate();
$Totals->tax = $Tax->calculate();
// Calculate final totals
$Totals->total = roundprice($Totals->subtotal - roundprice($Totals->discount) +
$Totals->shipping + $Totals->tax);
do_action_ref_array('ecart_cart_retotal',array(&$this->Totals));
$this->changed = false;
$this->retotal = false;
}
/**
* merchant_calc()
* Callback function for merchant calculated shipping and taxes
* taxes calculations unimplemented
* returns false when it responds, as acknowledgement of merchant calculations is unnecessary
* */
function merchant_calc ($XML) {
global $Ecart;
if ($XML->content('shipping') == 'false') return true; // ack
$sessionid = $XML->content('shopping-session');
$Ecart->resession($sessionid);
$Ecart->Order = Ecart_buyObject::__new('Order',$Ecart->Order);
$Ecart->Order->listeners();
$Shopping = &$Ecart->Shopping;
$Order = &$Ecart->Order;
// Get new address information on order
$shipto = $XML->tag('anonymous-address');
$Order->Shipping->city = $shipto->content('city'); //['city']['CONTENT']
$Order->Shipping->state = $shipto->content('region'); //['region']['CONTENT']
$Order->Shipping->country = $shipto->content('country-code'); //['country-code']['CONTENT']
$Order->Shipping->postcode = $shipto->content('postal-code'); //['postal-code']['CONTENT']
// Calculate shipping options
$Shipping = new CartShipping();
$Shipping->calculate();
$options = $Shipping->options();
if (empty($options)) return true; // acknowledge, but don't respond
$methods = $XML->attr('method','name');
$address_id = $XML->attr('anonymous-address','id');
$_ = array('<?xml version="1.0" encoding="UTF-8"?>');
$_[] = "<merchant-calculation-results xmlns=\"http://checkout.google.com/schema/2\">";
$_[] = "<results>";
foreach ($options as $option) {
if (in_array($option->name, $methods)) {
$_[] = '<result shipping-name="'.$option->name.'" address-id="'.$address_id.'">';
$_[] = '<shipping-rate currency="'.$this->settings['currency'].'">'.number_format($option->amount,$this->precision,'.','').'</shipping-rate>';
$_[] = '<shippable>true</shippable>';
$_[] = '</result>';
}
}
$_[] = "</results>";
$_[] = "</merchant-calculation-results>";
if(ECART_DEBUG) new EcartError(join("\n",$_),'google-merchant-calculation-results',ECART_DEBUG_ERR);
$this->response($_);
return false; //no ack
}
