/** * 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) { $extra = $item->getExtraTaxableAmount(); $baseExtra = $item->getBaseExtraTaxableAmount(); $qty = $item->getTotalQty(); $inclTax = $item->getIsPriceInclTax(); $price = $item->getTaxableAmount(); $basePrice = $item->getBaseTaxableAmount(); $item->setTaxPercent($rate); $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); $baseUnitTax = $this->_calculator->calcTaxAmount($basePrice, $rate, $inclTax); break; 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; $unitTax = $this->_calculator->calcTaxAmount(max($price - $discountAmount, 0), $rate, $inclTax); $baseUnitTax = $this->_calculator->calcTaxAmount(max($basePrice - $baseDiscountAmount, 0), $rate, $inclTax); if ($inclTax && $discountAmount > 0) { $hiddenTax = $price - $unitTax - $item->getConvertedPrice(); $baseHiddenTax = $basePrice - $unitTax - $item->getBasePrice(); } elseif ($discountAmount > $price) { // case with 100% discount on price incl. tax $hiddenTax = $discountAmount - $price; $baseHiddenTax = $baseDiscountAmount - $basePrice; } break; } $item->setTaxAmount($this->_store->roundPrice(max(0, $qty * $unitTax))); $item->setBaseTaxAmount($this->_store->roundPrice(max(0, $qty * $baseUnitTax))); $item->setHiddenTaxAmount(max(0, $qty * $hiddenTax)); $item->setBaseHiddenTaxAmount(max(0, $qty * $baseHiddenTax)); 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() + $item->getExtraTaxableAmount(); $basePrice = $item->getBaseTaxableAmount() + $item->getBaseExtraTaxableAmount(); $rateKey = (string) $rate; $item->setTaxPercent($rate); $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); $baseUnitTax = $this->_calculator->calcTaxAmount($basePrice, $rate, $inclTax); 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; $unitTax = $this->_calculator->calcTaxAmount($price, $rate, $inclTax); $discountRate = $unitTax / $price * 100; $unitTaxDiscount = $this->_calculator->calcTaxAmount($discountAmount, $discountRate, $inclTax, false); $unitTax = max($unitTax - $unitTaxDiscount, 0); $baseUnitTax = $this->_calculator->calcTaxAmount($basePrice, $rate, $inclTax); $baseDiscountRate = $baseUnitTax / $basePrice * 100; $baseUnitTaxDiscount = $this->_calculator->calcTaxAmount($baseDiscountAmount, $baseDiscountRate, $inclTax, false); $baseUnitTax = max($baseUnitTax - $baseUnitTaxDiscount, 0); if ($inclTax && $discountAmount > 0) { $hiddenTax = $this->_calculator->calcTaxAmount($discountAmount, $rate, $inclTax, false); $baseHiddenTax = $this->_calculator->calcTaxAmount($baseDiscountAmount, $rate, $inclTax, false); $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); } break; } $item->setTaxAmount($this->_store->roundPrice(max(0, $qty * $unitTax))); $item->setBaseTaxAmount($this->_store->roundPrice(max(0, $qty * $baseUnitTax))); 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) { $store = $item->getStore(); $inclTax = $this->_usePriceIncludeTax($store); $extra = $item->getExtraTaxableAmount(); $baseExtra = $item->getBaseExtraTaxableAmount(); if ($inclTax) { $price = $store->roundPrice($item->getTaxCalcPrice()) + $extra; $basePrice = $store->roundPrice($item->getBaseTaxCalcPrice()) + $baseExtra; } else { if ($item->hasCustomPrice() && $this->_helper->applyTaxOnCustomPrice($store)) { $price = $store->roundPrice($item->getCalculationPrice()) + $extra; $basePrice = $store->roundPrice($item->getBaseCalculationPrice()) + $baseExtra; } else { $price = $store->roundPrice($item->getOriginalPrice()) + $item->getExtraTaxableAmount(); $basePrice = $store->roundPrice($item->getBaseOriginalPrice()) + $item->getBaseExtraTaxableAmount(); } } $discountAmount = $item->getDiscountAmount(); $baseDiscountAmount = $item->getBaseDiscountAmount(); $qty = $item->getTotalQty(); $item->setTaxPercent($rate); $rate = $rate / 100; $calculationSequence = $this->_config->getCalculationSequence($store); switch ($calculationSequence) { case Mage_Tax_Model_Calculation::CALC_TAX_BEFORE_DISCOUNT_ON_EXCL: $unitTax = $this->_calculator->calcTaxAmount($price, $rate, $inclTax); $baseUnitTax = $this->_calculator->calcTaxAmount($basePrice, $rate, $inclTax); break; case Mage_Tax_Model_Calculation::CALC_TAX_BEFORE_DISCOUNT_ON_INCL: $unitTax = $this->_calculator->calcTaxAmount($price, $rate, $inclTax); $baseUnitTax = $this->_calculator->calcTaxAmount($basePrice, $rate, $inclTax); if ($inclTax) { $item->setDiscountCalculationPrice($price); $item->setBaseDiscountCalculationPrice($basePrice); } else { $item->setDiscountCalculationPrice($price + $unitTax); $item->setBaseDiscountCalculationPrice($basePrice + $baseUnitTax); } break; case Mage_Tax_Model_Calculation::CALC_TAX_AFTER_DISCOUNT_ON_EXCL: case Mage_Tax_Model_Calculation::CALC_TAX_AFTER_DISCOUNT_ON_INCL: $unitTax = $this->_calculator->calcTaxAmount($price - $discountAmount / $qty, $rate, $inclTax); $baseUnitTax = $this->_calculator->calcTaxAmount($basePrice - $baseDiscountAmount / $qty, $rate, $inclTax); break; } $totalTax = $store->roundPrice($qty * $unitTax); $totalBaseTax = $store->roundPrice($qty * $baseUnitTax); /** * Renew item amounts in case if we are working with price include tax */ if ($inclTax) { if ($item->hasCustomPrice()) { $item->setCustomPrice($item->getPriceInclTax() - $unitTax); $item->setBaseCustomPrice($item->getBasePriceInclTax() - $baseUnitTax); } else { $item->setOriginalPrice($item->getPriceInclTax() - $unitTax); $item->setPrice($item->getBasePriceInclTax() - $baseUnitTax); $item->setBasePrice($item->getBasePriceInclTax() - $baseUnitTax); } $item->setRowTotal($item->getRowTotalInclTax() - $totalTax); $item->setBaseRowTotal($item->getBaseRowTotalInclTax() - $totalBaseTax); } $item->setTaxAmount($totalTax); $item->setBaseTaxAmount($totalBaseTax); return $this; }