/**
* 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;
}
