/**
* Round price considering delta
*
* @param float $price
* @param bool $negative Indicates if we perform addition (true) or subtraction (false) of rounded value
* @return float
*/
public function deltaRound($price, $negative = false)
{
$roundedPrice = $price;
if ($roundedPrice) {
if ($negative) {
$this->_delta = -$this->_delta;
}
$price += $this->_delta;
$roundedPrice = $this->_store->roundPrice($price);
$this->_delta = $price - $roundedPrice;
if ($negative) {
$this->_delta = -$this->_delta;
}
}
return $roundedPrice;
}
/**
* Round the amount with deltas collected
*
* @param string $key
* @param float $amount
* @param Mage_Core_Model_Store $store
* @return float
*/
protected function _roundWithDeltasForBase($key, $amount, $store)
{
$delta = isset($this->_baseRoundingDeltas[$key]) ? $this->_roundingDeltas[$key] : 0;
$this->_baseRoundingDeltas[$key] = $store->roundPrice($amount + $delta) - $amount;
return $store->roundPrice($amount + $delta);
}
/**
* Given a store price that includes tax at the store rate, this function will back out the store's tax, and add in
* the customer's tax. Returns this new price which is the customer's price including tax.
*
* @param float $storePriceInclTax
* @param float $storePercent
* @param float $customerPercent
* @param Mage_Core_Model_Store $store
* @return float
*/
protected function _calculatePriceInclTax($storePriceInclTax, $storePercent, $customerPercent, $store)
{
$priceExclTax = $this->_calculatePrice($storePriceInclTax, $storePercent, false, false);
$customerTax = $this->getCalculator()->calcTaxAmount($priceExclTax, $customerPercent, false, false);
$customerPriceInclTax = $store->roundPrice($priceExclTax + $customerTax);
return $customerPriceInclTax;
}
/**
* Calculate unit tax anount based on unit price
*
* @param Mage_Sales_Model_Quote_Item_Abstract $item
* @param float $rate
* @param array $taxGroups
* @param string $taxId
* @param boolean $recalculateRowTotalInclTax
* @return Mage_Tax_Model_Sales_Total_Quote
*/
protected function _calcUnitTaxAmount($item, $rate, &$taxGroups = null, $taxId = null, $recalculateRowTotalInclTax = false)
{
$qty = $item->getTotalQty();
$inclTax = $item->getIsPriceInclTax();
$price = $item->getTaxableAmount();
$basePrice = $item->getBaseTaxableAmount();
$rateKey = $taxId == null ? (string) $rate : $taxId;
$isWeeeEnabled = $this->_weeeHelper->isEnabled();
$isWeeeTaxable = $this->_weeeHelper->isTaxable();
$hiddenTax = null;
$baseHiddenTax = null;
$weeeTax = null;
$baseWeeeTax = null;
$unitTaxBeforeDiscount = null;
$weeeTaxBeforeDiscount = null;
$baseUnitTaxBeforeDiscount = null;
$baseWeeeTaxBeforeDiscount = null;
switch ($this->_config->getCalculationSequence($this->_store)) {
case Mage_Tax_Model_Calculation::CALC_TAX_BEFORE_DISCOUNT_ON_EXCL:
case Mage_Tax_Model_Calculation::CALC_TAX_BEFORE_DISCOUNT_ON_INCL:
$unitTaxBeforeDiscount = $this->_calculator->calcTaxAmount($price, $rate, $inclTax, false);
$baseUnitTaxBeforeDiscount = $this->_calculator->calcTaxAmount($basePrice, $rate, $inclTax, false);
if ($isWeeeEnabled && $isWeeeTaxable) {
$weeeTaxBeforeDiscount = $this->_calculateWeeeTax(0, $item, $rate, false);
$unitTaxBeforeDiscount += $weeeTaxBeforeDiscount;
$baseWeeeTaxBeforeDiscount = $this->_calculateWeeeTax(0, $item, $rate);
$baseUnitTaxBeforeDiscount += $baseWeeeTaxBeforeDiscount;
}
$unitTaxBeforeDiscount = $unitTax = $this->_calculator->round($unitTaxBeforeDiscount);
$baseUnitTaxBeforeDiscount = $baseUnitTax = $this->_calculator->round($baseUnitTaxBeforeDiscount);
break;
case Mage_Tax_Model_Calculation::CALC_TAX_AFTER_DISCOUNT_ON_EXCL:
case Mage_Tax_Model_Calculation::CALC_TAX_AFTER_DISCOUNT_ON_INCL:
$discountAmount = $item->getDiscountAmount() / $qty;
$baseDiscountAmount = $item->getBaseDiscountAmount() / $qty;
//We want to remove weee
if ($isWeeeEnabled && $this->_weeeHelper->includeInSubtotal()) {
$discountAmount = $discountAmount - $item->getWeeeDiscount() / $qty;
$baseDiscountAmount = $baseDiscountAmount - $item->getBaseWeeeDiscount() / $qty;
}
$unitTaxBeforeDiscount = $this->_calculator->calcTaxAmount($price, $rate, $inclTax, false);
$unitTaxDiscount = $this->_calculator->calcTaxAmount($discountAmount, $rate, $inclTax, false);
$unitTax = $this->_calculator->round(max($unitTaxBeforeDiscount - $unitTaxDiscount, 0));
$baseUnitTaxBeforeDiscount = $this->_calculator->calcTaxAmount($basePrice, $rate, $inclTax, false);
$baseUnitTaxDiscount = $this->_calculator->calcTaxAmount($baseDiscountAmount, $rate, $inclTax, false);
$baseUnitTax = $this->_calculator->round(max($baseUnitTaxBeforeDiscount - $baseUnitTaxDiscount, 0));
if ($isWeeeEnabled && $this->_weeeHelper->isTaxable()) {
$weeeTax = $this->_calculateRowWeeeTax($item->getWeeeDiscount(), $item, $rate, false);
$weeeTax = $weeeTax / $qty;
$unitTax += $weeeTax;
$baseWeeeTax = $this->_calculateRowWeeeTax($item->getBaseWeeeDiscount(), $item, $rate);
$baseWeeeTax = $baseWeeeTax / $qty;
$baseUnitTax += $baseWeeeTax;
}
$unitTax = $this->_calculator->round($unitTax);
$baseUnitTax = $this->_calculator->round($baseUnitTax);
//Calculate the weee taxes before discount
$weeeTaxBeforeDiscount = 0;
$baseWeeeTaxBeforeDiscount = 0;
if ($isWeeeTaxable) {
$weeeTaxBeforeDiscount = $this->_calculateWeeeTax(0, $item, $rate, false);
$unitTaxBeforeDiscount += $weeeTaxBeforeDiscount;
$baseWeeeTaxBeforeDiscount = $this->_calculateWeeeTax(0, $item, $rate);
$baseUnitTaxBeforeDiscount += $baseWeeeTaxBeforeDiscount;
}
$unitTaxBeforeDiscount = max(0, $this->_calculator->round($unitTaxBeforeDiscount));
$baseUnitTaxBeforeDiscount = max(0, $this->_calculator->round($baseUnitTaxBeforeDiscount));
if ($inclTax && $discountAmount > 0) {
$hiddenTax = $unitTaxBeforeDiscount - $unitTax;
$baseHiddenTax = $baseUnitTaxBeforeDiscount - $baseUnitTax;
$this->_hiddenTaxes[] = array('rate_key' => $rateKey, 'qty' => $qty, 'item' => $item, 'value' => $hiddenTax, 'base_value' => $baseHiddenTax, 'incl_tax' => $inclTax);
} elseif ($discountAmount > $price) {
// case with 100% discount on price incl. tax
$hiddenTax = $discountAmount - $price;
$baseHiddenTax = $baseDiscountAmount - $basePrice;
$this->_hiddenTaxes[] = array('rate_key' => $rateKey, 'qty' => $qty, 'item' => $item, 'value' => $hiddenTax, 'base_value' => $baseHiddenTax, 'incl_tax' => $inclTax);
}
// calculate discount compensation
// We need the discount compensation when dont calculate the hidden taxes
// (when product does not include taxes)
if (!$item->getNoDiscount() && $item->getWeeeTaxApplied()) {
$item->setDiscountTaxCompensation($item->getDiscountTaxCompensation() + $unitTaxBeforeDiscount * $qty - max(0, $unitTax) * $qty);
}
break;
}
$rowTax = $this->_store->roundPrice(max(0, $qty * $unitTax));
$baseRowTax = $this->_store->roundPrice(max(0, $qty * $baseUnitTax));
$item->setTaxAmount($item->getTaxAmount() + $rowTax);
$item->setBaseTaxAmount($item->getBaseTaxAmount() + $baseRowTax);
if (is_array($taxGroups)) {
$taxGroups[$rateKey]['tax'] = max(0, $rowTax);
$taxGroups[$rateKey]['base_tax'] = max(0, $baseRowTax);
}
$rowTotalInclTax = $item->getRowTotalInclTax();
if (!isset($rowTotalInclTax) || $recalculateRowTotalInclTax) {
if ($this->_config->priceIncludesTax($this->_store)) {
$item->setRowTotalInclTax($price * $qty);
$item->setBaseRowTotalInclTax($basePrice * $qty);
} else {
$item->setRowTotalInclTax($item->getRowTotalInclTax() + ($unitTaxBeforeDiscount - $weeeTaxBeforeDiscount) * $qty);
$item->setBaseRowTotalInclTax($item->getBaseRowTotalInclTax() + ($baseUnitTaxBeforeDiscount - $baseWeeeTaxBeforeDiscount) * $qty);
}
}
return $this;
}
/**
* Calculate unit tax anount based on unit price
*
* @param Mage_Sales_Model_Quote_Item_Abstract $item
* @param float $rate
* @return Mage_Tax_Model_Sales_Total_Quote
*/
protected function _calcUnitTaxAmount(Mage_Sales_Model_Quote_Item_Abstract $item, $rate)
{
$qty = $item->getTotalQty();
$inclTax = $item->getIsPriceInclTax();
$price = $item->getTaxableAmount();
$basePrice = $item->getBaseTaxableAmount();
$rateKey = (string) $rate;
$item->setTaxPercent($rate);
$isWeeeEnabled = $this->_weeeHelper->isEnabled();
$isWeeeTaxable = $this->_weeeHelper->isTaxable();
$hiddenTax = null;
$baseHiddenTax = null;
switch ($this->_config->getCalculationSequence($this->_store)) {
case Mage_Tax_Model_Calculation::CALC_TAX_BEFORE_DISCOUNT_ON_EXCL:
case Mage_Tax_Model_Calculation::CALC_TAX_BEFORE_DISCOUNT_ON_INCL:
$unitTax = $this->_calculator->calcTaxAmount($price, $rate, $inclTax, false);
$baseUnitTax = $this->_calculator->calcTaxAmount($basePrice, $rate, $inclTax, false);
if ($isWeeeEnabled && $isWeeeTaxable) {
$unitTax += $item->getWeeeTaxAppliedAmount() * $rate / 100;
$baseUnitTax += $item->getBaseWeeeTaxAppliedAmount() * $rate / 100;
}
$unitTax = $this->_calculator->round($unitTax);
$baseUnitTax = $this->_calculator->round($baseUnitTax);
break;
case Mage_Tax_Model_Calculation::CALC_TAX_AFTER_DISCOUNT_ON_EXCL:
case Mage_Tax_Model_Calculation::CALC_TAX_AFTER_DISCOUNT_ON_INCL:
$discountAmount = $item->getDiscountAmount() / $qty;
$baseDiscountAmount = $item->getBaseDiscountAmount() / $qty;
if ($isWeeeEnabled) {
$discountAmount = $discountAmount - $item->getWeeeDiscount() / $qty;
$baseDiscountAmount = $baseDiscountAmount - $item->getBaseWeeeDiscount() / $qty;
}
$unitTaxBeforeDiscount = $this->_calculator->calcTaxAmount($price, $rate, $inclTax, false);
$unitTaxDiscount = $this->_calculator->calcTaxAmount($discountAmount, $rate, $inclTax, false);
$unitTax = $this->_calculator->round(max($unitTaxBeforeDiscount - $unitTaxDiscount, 0));
$baseUnitTaxBeforeDiscount = $this->_calculator->calcTaxAmount($basePrice, $rate, $inclTax, false);
$baseUnitTaxDiscount = $this->_calculator->calcTaxAmount($baseDiscountAmount, $rate, $inclTax, false);
$baseUnitTax = $this->_calculator->round(max($baseUnitTaxBeforeDiscount - $baseUnitTaxDiscount, 0));
if ($isWeeeEnabled && $this->_weeeHelper->isTaxable()) {
$weeeTax = ($item->getWeeeTaxAppliedRowAmount() - $item->getWeeeDiscount()) * $rate / 100;
$weeeTax = $weeeTax / $qty;
$unitTax += $weeeTax;
$baseWeeeTax = ($item->getBaseWeeeTaxAppliedRowAmount() - $item->getBaseWeeeDiscount()) * $rate / 100;
$baseWeeeTax = $baseWeeeTax / $qty;
$baseUnitTax += $baseWeeeTax;
}
$unitTax = $this->_calculator->round($unitTax);
$baseUnitTax = $this->_calculator->round($baseUnitTax);
if ($inclTax && $discountAmount > 0) {
$hiddenTax = $this->_calculator->round($unitTaxBeforeDiscount) - $unitTax;
$baseHiddenTax = $this->_calculator->round($baseUnitTaxBeforeDiscount) - $baseUnitTax;
$this->_hiddenTaxes[] = array('rate_key' => $rateKey, 'qty' => $qty, 'item' => $item, 'value' => $hiddenTax, 'base_value' => $baseHiddenTax, 'incl_tax' => $inclTax);
} elseif ($discountAmount > $price) {
// case with 100% discount on price incl. tax
$hiddenTax = $discountAmount - $price;
$baseHiddenTax = $baseDiscountAmount - $basePrice;
$this->_hiddenTaxes[] = array('rate_key' => $rateKey, 'qty' => $qty, 'item' => $item, 'value' => $hiddenTax, 'base_value' => $baseHiddenTax, 'incl_tax' => $inclTax);
}
// calculate discount compensation
if (!$item->getNoDiscount() && $item->getWeeeTaxApplied()) {
$unitTaxBeforeDiscount = $this->_calculator->calcTaxAmount($price, $rate, $inclTax, false);
$baseUnitTaxBeforeDiscount = $this->_calculator->calcTaxAmount($price, $rate, $inclTax, false);
if ($isWeeeTaxable) {
$unitTaxBeforeDiscount += $item->getWeeeTaxAppliedAmount() * $rate / 100;
$baseUnitTaxBeforeDiscount += $item->getBaseWeeeTaxAppliedAmount() * $rate / 100;
}
$unitTaxBeforeDiscount = max(0, $this->_calculator->round($unitTaxBeforeDiscount));
$baseUnitTaxBeforeDiscount = max(0, $this->_calculator->round($baseUnitTaxBeforeDiscount));
$item->setDiscountTaxCompensation($unitTaxBeforeDiscount * $qty - max(0, $unitTax) * $qty);
$item->setBaseDiscountTaxCompensation($baseUnitTaxBeforeDiscount * $qty - max(0, $baseUnitTax) * $qty);
}
break;
}
$item->setTaxAmount($this->_store->roundPrice(max(0, $qty * $unitTax)));
$item->setBaseTaxAmount($this->_store->roundPrice(max(0, $qty * $baseUnitTax)));
$rowTotalInclTax = $item->getRowTotalInclTax();
if (!isset($rowTotalInclTax)) {
if ($this->_config->priceIncludesTax($this->_store)) {
$weeeTaxBeforeDiscount = 0;
$baseWeeeTaxBeforeDiscount = 0;
if ($isWeeeTaxable) {
$weeeTaxBeforeDiscount = $item->getWeeeTaxAppliedRowAmount() * $rate / 100;
$baseWeeeTaxBeforeDiscount = $item->getBaseWeeeTaxAppliedRowAmount() * $rate / 100;
}
$item->setRowTotalInclTax($price * $qty + $weeeTaxBeforeDiscount);
$item->setBaseRowTotalInclTax($basePrice * $qty + $baseWeeeTaxBeforeDiscount);
} else {
$taxCompensation = $item->getDiscountTaxCompensation() ? $item->getDiscountTaxCompensation() : 0;
$item->setRowTotalInclTax($price * $qty + $unitTax * $qty + $taxCompensation);
$item->setBaseRowTotalInclTax($basePrice * $qty + $baseUnitTax * $qty + $item->getBaseDiscountTaxCompensation());
}
}
return $this;
}
