public function calculate_taxes($cart = null, $packages = null, $return_packages = false)
{
global $woocommerce;
if (get_option('woocommerce_calc_taxes', 0) != 'yes') {
if ($return_packages) {
return $packages;
}
return;
}
$default_shipping_location = array($woocommerce->customer->get_shipping_country(), $woocommerce->customer->get_shipping_state(), $woocommerce->customer->get_shipping_postcode());
$merge = false;
if (!is_object($cart)) {
$cart = $woocommerce->cart;
$merge = true;
}
if (isset($_POST['action']) && $_POST['action'] == 'woocommerce_update_shipping_method') {
return $cart;
}
if (!$packages) {
$packages = $cart->get_shipping_packages();
}
if (count($packages) < 2) {
return;
}
// clear the taxes arrays remove tax totals from the grand total
$old_taxes = $cart->taxes;
$old_tax_total = $cart->tax_total;
$old_shipping_taxes = $cart->shipping_taxes;
$old_shipping_tax_total = $cart->shipping_tax_total;
$old_total = $cart->total;
$cart_total_without_taxes = $old_total - ($old_tax_total + $old_shipping_tax_total);
// deduct taxes from the subtotal
$cart->subtotal -= $old_tax_total;
$item_taxes = array();
$cart_taxes = array();
foreach ($packages as $idx => $package) {
if (isset($package['destination']) && !$this->wcms->is_address_empty($package['destination'])) {
$woocommerce->customer->calculated_shipping(true);
$woocommerce->customer->set_shipping_location($package['destination']['country'], $package['destination']['state'], $package['destination']['postcode']);
}
$tax_rates = array();
$shop_tax_rates = array();
/**
* Calculate subtotals for items. This is done first so that discount logic can use the values.
*/
foreach ($package['contents'] as $cart_item_key => $values) {
$_product = $values['data'];
// Prices
$line_price = $_product->get_price() * $values['quantity'];
$line_subtotal = 0;
$line_subtotal_tax = 0;
if (!$_product->is_taxable()) {
$line_subtotal = $line_price;
} elseif ($cart->prices_include_tax) {
// Get base tax rates
if (empty($shop_tax_rates[$_product->tax_class])) {
$shop_tax_rates[$_product->tax_class] = $cart->tax->get_shop_base_rate($_product->tax_class);
}
// Get item tax rates
if (empty($tax_rates[$_product->get_tax_class()])) {
$tax_rates[$_product->get_tax_class()] = $cart->tax->get_rates($_product->get_tax_class());
}
$base_tax_rates = $shop_tax_rates[$_product->tax_class];
$item_tax_rates = $tax_rates[$_product->get_tax_class()];
/**
* ADJUST TAX - Calculations when base tax is not equal to the item tax
*/
if ($item_tax_rates !== $base_tax_rates) {
// Work out a new base price without the shop's base tax
$taxes = $cart->tax->calc_tax($line_price, $base_tax_rates, true, true);
// Now we have a new item price (excluding TAX)
$line_subtotal = $line_price - array_sum($taxes);
// Now add modifed taxes
$tax_result = $cart->tax->calc_tax($line_subtotal, $item_tax_rates);
$line_subtotal_tax = array_sum($tax_result);
/**
* Regular tax calculation (customer inside base and the tax class is unmodified
*/
} else {
// Calc tax normally
$taxes = $cart->tax->calc_tax($line_price, $item_tax_rates, true);
$line_subtotal_tax = array_sum($taxes);
$line_subtotal = $line_price - array_sum($taxes);
}
/**
* Prices exclude tax
*
* This calculation is simpler - work with the base, untaxed price.
*/
} else {
// Get item tax rates
if (empty($tax_rates[$_product->get_tax_class()])) {
$tax_rates[$_product->get_tax_class()] = WC_MS_Compatibility::get_tax_rates($_product->get_tax_class());
}
$item_tax_rates = $tax_rates[$_product->get_tax_class()];
// Base tax for line before discount - we will store this in the order data
$taxes = WC_MS_Compatibility::calc_tax($line_price, $item_tax_rates);
$line_subtotal_tax = array_sum($taxes);
$line_subtotal = $line_price;
}
// Add to main subtotal
$cart->subtotal += $line_subtotal_tax;
}
/**
* Calculate totals for items
*/
foreach ($package['contents'] as $cart_item_key => $values) {
$_product = $values['data'];
// Prices
$base_price = $_product->get_price();
$line_price = $_product->get_price() * $values['quantity'];
// Tax data
$taxes = array();
$discounted_taxes = array();
if (!$_product->is_taxable()) {
// Discounted Price (price with any pre-tax discounts applied)
$discounted_price = $cart->get_discounted_price($values, $base_price, true);
$line_subtotal_tax = 0;
$line_subtotal = $line_price;
$line_tax = 0;
$line_total = WC_MS_Compatibility::round_tax($discounted_price * $values['quantity']);
/**
* Prices include tax
*/
} elseif ($cart->prices_include_tax) {
$base_tax_rates = $shop_tax_rates[$_product->tax_class];
$item_tax_rates = $tax_rates[$_product->get_tax_class()];
/**
* ADJUST TAX - Calculations when base tax is not equal to the item tax
*/
if ($item_tax_rates !== $base_tax_rates) {
// Work out a new base price without the shop's base tax
$taxes = $cart->tax->calc_tax($line_price, $base_tax_rates, true, true);
// Now we have a new item price (excluding TAX)
$line_subtotal = woocommerce_round_tax_total($line_price - array_sum($taxes));
// Now add modifed taxes
$taxes = $cart->tax->calc_tax($line_subtotal, $item_tax_rates);
$line_subtotal_tax = array_sum($taxes);
// Adjusted price (this is the price including the new tax rate)
$adjusted_price = ($line_subtotal + $line_subtotal_tax) / $values['quantity'];
// Apply discounts
$discounted_price = $cart->get_discounted_price($values, $adjusted_price, true);
$discounted_taxes = $cart->tax->calc_tax($discounted_price * $values['quantity'], $item_tax_rates, true);
$line_tax = array_sum($discounted_taxes);
$line_total = $discounted_price * $values['quantity'] - $line_tax;
/**
* Regular tax calculation (customer inside base and the tax class is unmodified
*/
} else {
// Work out a new base price without the shop's base tax
$taxes = $cart->tax->calc_tax($line_price, $item_tax_rates, true);
// Now we have a new item price (excluding TAX)
$line_subtotal = $line_price - array_sum($taxes);
$line_subtotal_tax = array_sum($taxes);
// Calc prices and tax (discounted)
$discounted_price = $cart->get_discounted_price($values, $base_price, true);
$discounted_taxes = $cart->tax->calc_tax($discounted_price * $values['quantity'], $item_tax_rates, true);
$line_tax = array_sum($discounted_taxes);
$line_total = $discounted_price * $values['quantity'] - $line_tax;
}
// Tax rows - merge the totals we just got
foreach (array_keys($cart_taxes + $discounted_taxes) as $key) {
$cart_taxes[$key] = (isset($discounted_taxes[$key]) ? $discounted_taxes[$key] : 0) + (isset($cart_taxes[$key]) ? $cart_taxes[$key] : 0);
}
/**
* Prices exclude tax
*/
} else {
$item_tax_rates = $tax_rates[$_product->get_tax_class()];
// Work out a new base price without the shop's base tax
$taxes = WC_MS_Compatibility::calc_tax($line_price, $item_tax_rates);
// Now we have the item price (excluding TAX)
$line_subtotal = $line_price;
$line_subtotal_tax = array_sum($taxes);
// Now calc product rates
$discounted_price = $cart->get_discounted_price($values, $base_price, true);
$discounted_taxes = WC_MS_Compatibility::calc_tax($discounted_price * $values['quantity'], $item_tax_rates);
$discounted_tax_amount = array_sum($discounted_taxes);
$line_tax = $discounted_tax_amount;
$line_total = $discounted_price * $values['quantity'];
// Tax rows - merge the totals we just got
foreach (array_keys($cart_taxes + $discounted_taxes) as $key) {
$cart_taxes[$key] = (isset($discounted_taxes[$key]) ? $discounted_taxes[$key] : 0) + (isset($cart_taxes[$key]) ? $cart_taxes[$key] : 0);
}
}
// Store costs + taxes for lines
if (!isset($item_taxes[$cart_item_key])) {
$item_taxes[$cart_item_key]['line_total'] = $line_total;
$item_taxes[$cart_item_key]['line_tax'] = $line_tax;
$item_taxes[$cart_item_key]['line_subtotal'] = $line_subtotal;
$item_taxes[$cart_item_key]['line_subtotal_tax'] = $line_subtotal_tax;
$item_taxes[$cart_item_key]['line_tax_data'] = array('total' => $discounted_taxes, 'subtotal' => $taxes);
} else {
$item_taxes[$cart_item_key]['line_total'] += $line_total;
$item_taxes[$cart_item_key]['line_tax'] += $line_tax;
$item_taxes[$cart_item_key]['line_subtotal'] += $line_subtotal;
$item_taxes[$cart_item_key]['line_subtotal_tax'] += $line_subtotal_tax;
$item_taxes[$cart_item_key]['line_tax_data']['total'] += $discounted_taxes;
$item_taxes[$cart_item_key]['line_tax_data']['subtotal'] += $taxes;
}
$packages[$idx]['contents'][$cart_item_key]['line_total'] = $line_total;
$packages[$idx]['contents'][$cart_item_key]['line_tax'] = $line_tax;
$packages[$idx]['contents'][$cart_item_key]['line_subtotal'] = $line_subtotal;
$packages[$idx]['contents'][$cart_item_key]['line_subtotal_tax'] = $line_subtotal_tax;
$packages[$idx]['contents'][$cart_item_key]['line_tax_data'] = array('total' => $discounted_taxes, 'subtotal' => $taxes);
}
}
foreach ($item_taxes as $cart_item_key => $taxes) {
if (!isset($cart->cart_contents[$cart_item_key])) {
continue;
}
$product_id = $cart->cart_contents[$cart_item_key]['product_id'];
$woocommerce->cart->recurring_cart_contents = array();
$cart->cart_contents[$cart_item_key]['line_total'] = $taxes['line_total'];
$cart->cart_contents[$cart_item_key]['line_tax'] = $taxes['line_tax'];
$cart->cart_contents[$cart_item_key]['line_subtotal'] = $taxes['line_subtotal'];
$cart->cart_contents[$cart_item_key]['line_subtotal_tax'] = $taxes['line_subtotal_tax'];
$cart->cart_contents[$cart_item_key]['line_tax_data'] = $taxes['line_tax_data'];
// Set recurring taxes for subscription products
if (class_exists('WC_Subscriptions_Product') && WC_Subscriptions_Product::is_subscription($product_id)) {
$woocommerce->cart->recurring_cart_contents[$product_id]['recurring_line_total'] = $taxes['line_total'];
$woocommerce->cart->recurring_cart_contents[$product_id]['recurring_line_tax'] = $taxes['line_tax'];
$woocommerce->cart->recurring_cart_contents[$product_id]['recurring_line_subtotal'] = $taxes['line_subtotal'];
$woocommerce->cart->recurring_cart_contents[$product_id]['recurring_line_subtotal_tax'] = $taxes['line_subtotal_tax'];
}
}
// Total up/round taxes and shipping taxes
if ($cart->round_at_subtotal) {
$cart->tax_total = WC_MS_Compatibility::get_tax_total($cart_taxes);
$cart->taxes = array_map('WC_MS_Compatibility::round_tax', $cart_taxes);
} else {
$cart->tax_total = array_sum($cart_taxes);
$cart->taxes = array_map('WC_MS_Compatibility::round_tax', $cart_taxes);
}
if ($merge) {
$woocommerce->cart = $cart;
}
// Setting an empty default customer shipping location prevents
// subtotal calculation from applying the incorrect taxes based
// on the shipping address. But do not remove the shipping country
// to satisfy the validation done on WC_Checkout
$woocommerce->customer->calculated_shipping(false);
$woocommerce->customer->set_shipping_location($woocommerce->customer->get_shipping_country(), '', '');
if ($return_packages) {
return $packages;
}
// store the modified packages array
wcms_session_set('wcms_packages', $packages);
return $cart;
}
/**
* Round to precision
* @param float $in
* @return float
*/
public static function round_tax($in)
{
if (function_exists('wc_round_tax_total')) {
return wc_round_tax_total($in);
} else {
return woocommerce_round_tax_total($in);
}
}
