/**
* Calculate products and shipping taxes
*
* @param array $cart Cart data
* @param array $group_key Group number
* @param array $group_products Products data
* @param array $shipping_rates
* @param array $auth Auth data
* @return boolean Always false
*/
function fn_calculate_taxes(&$cart, $group_key, &$group_products, &$shipping_rates, $auth)
{
/**
* Prepare params before applying products and shipping taxes to cart
*
* @param array $cart Cart data
* @param array $group_products Products data
* @param array $shipping_rates
* @param array $auth Auth data
*/
fn_set_hook('calculate_taxes_pre', $cart, $group_products, $shipping_rates, $auth);
$calculated_data = array();
if (Registry::get('settings.General.tax_calculation') == 'unit_price') {
// Tax calculation method based on UNIT PRICE
// Calculate product taxes
foreach ($group_products as $k => $product) {
$taxes = fn_get_product_taxes($k, $cart, $group_products);
if (empty($taxes)) {
continue;
}
if (isset($product['subtotal'])) {
if ($product['price'] == $product['subtotal'] && $product['amount'] != 1) {
$price = fn_format_price($product['price']);
} else {
$price = fn_format_price($product['subtotal'] / $product['amount']);
}
$calculated_data['P_' . $k] = fn_calculate_tax_rates($taxes, $price, $product['amount'], $auth, $cart);
$group_products[$k]['tax_summary'] = array('included' => 0, 'added' => 0, 'total' => 0);
// tax summary for 1 unit of product
$cart['products'][$k]['tax_summary'] = array('included' => 0, 'added' => 0, 'total' => 0);
// tax summary for 1 unit of product
// Apply taxes to product subtotal
if (!empty($calculated_data['P_' . $k])) {
foreach ($calculated_data['P_' . $k] as $_k => $v) {
$group_products[$k]['taxes'][$_k] = $v;
$cart['products'][$k]['taxes'][$_k] = $v;
if ($taxes[$_k]['price_includes_tax'] != 'Y') {
$group_products[$k]['tax_summary']['added'] += $v['tax_subtotal'];
$cart['products'][$k]['tax_summary']['added'] += $v['tax_subtotal'];
} else {
$group_products[$k]['tax_summary']['included'] += $v['tax_subtotal'];
$cart['products'][$k]['tax_summary']['included'] += $v['tax_subtotal'];
}
}
$group_products[$k]['tax_summary']['total'] = $group_products[$k]['tax_summary']['added'] + $group_products[$k]['tax_summary']['included'];
$cart['products'][$k]['tax_summary']['total'] = $cart['products'][$k]['tax_summary']['added'] + $cart['products'][$k]['tax_summary']['included'];
}
}
}
// Calculate shipping taxes
if (!empty($shipping_rates)) {
foreach ($shipping_rates as $shipping_id => $shipping) {
$taxes = fn_get_shipping_taxes($shipping_id, $shipping_rates, $cart);
if (!empty($taxes)) {
$shipping_rates[$shipping_id]['taxes'] = array();
$calculate_rate = true;
if (!empty($cart['chosen_shipping'][$group_key]) && $cart['chosen_shipping'][$group_key] == $shipping_id) {
$calculated_data['S_' . $group_key . '_' . $shipping_id] = fn_calculate_tax_rates($taxes, $shipping['rate'], 1, $auth, $cart);
if (!empty($calculated_data['S_' . $group_key . '_' . $shipping_id])) {
foreach ($calculated_data['S_' . $group_key . '_' . $shipping_id] as $__k => $__v) {
if ($taxes[$__k]['price_includes_tax'] != 'Y') {
$cart['display_shipping_cost'] += Registry::get('settings.Appearance.cart_prices_w_taxes') == 'Y' ? $__v['tax_subtotal'] : 0;
$cart['tax_subtotal'] += $__v['tax_subtotal'];
}
if ($cart['stored_taxes'] == 'Y') {
$cart['taxes'][$__k]['applies']['S_' . $group_key . '_' . $shipping_id] = $__v['tax_subtotal'];
}
}
$shipping_rates[$shipping_id]['taxes']['S_' . $group_key . '_' . $shipping_id] = $calculated_data['S_' . $group_key . '_' . $shipping_id];
$calculate_rate = false;
}
}
if ($calculate_rate) {
$cur_shipping_rates = fn_calculate_tax_rates($taxes, $shipping['rate'], 1, $auth, $cart);
if (!empty($cur_shipping_rates)) {
$shipping_rates[$shipping_id]['taxes'] = $cur_shipping_rates;
}
}
}
}
foreach ($shipping_rates as $shipping_id => $shipping) {
// Calculate taxes for each shipping rate
$taxes = fn_get_shipping_taxes($shipping_id, $shipping_rates, $cart);
$shipping_rates[$shipping_id]['taxed_price'] = 0;
unset($shipping_rates[$shipping_id]['inc_tax']);
if (!empty($taxes)) {
$shipping_rates[$shipping_id]['taxes'] = array();
$tax = fn_calculate_tax_rates($taxes, fn_format_price($shipping['rate']), 1, $auth, $cart);
$shipping_rates[$shipping_id]['taxes'] = $tax;
if (!empty($tax) && Registry::get('settings.Appearance.cart_prices_w_taxes') == 'Y') {
foreach ($tax as $_id => $_tax) {
if ($_tax['price_includes_tax'] != 'Y') {
$shipping_rates[$shipping_id]['taxed_price'] += $_tax['tax_subtotal'];
}
}
$shipping_rates[$shipping_id]['inc_tax'] = true;
}
if (!empty($shipping_rates[$shipping_id]['rate']) && $shipping_rates[$shipping_id]['taxed_price'] > 0) {
$shipping_rates[$shipping_id]['taxed_price'] += $shipping_rates[$shipping_id]['rate'];
}
}
}
}
} else {
// Tax calculation method based on SUBTOTAL
// Calculate discounted subtotal
if (!isset($cart['subtotal_discount'])) {
$cart['subtotal_discount'] = 0;
}
$discounted_subtotal = $cart['subtotal'] - $cart['subtotal_discount'];
if ($discounted_subtotal < 0) {
$discounted_subtotal = 0;
}
// Get discount distribution coefficient (DDC) between taxes
if ($cart['subtotal'] > 0) {
$ddc = $discounted_subtotal / $cart['subtotal'];
} else {
$ddc = 1;
}
//
// Group subtotal by taxes
//
$subtotal = array();
// Get products taxes
foreach ($group_products as $cart_id => $product) {
$taxes = fn_get_product_taxes($cart_id, $cart, $group_products);
if (!empty($taxes)) {
foreach ($taxes as $tax_id => $tax) {
if (empty($subtotal[$tax_id])) {
$subtotal[$tax_id] = fn_init_tax_subtotals($tax);
}
$_subtotal = $product['price'] == $product['subtotal'] && $product['amount'] != 1 ? fn_format_price($product['price'] * $product['amount']) : $product['subtotal'];
$subtotal[$tax_id]['subtotal'] += $_subtotal;
$subtotal[$tax_id]['applies']['P'] += $_subtotal;
$subtotal[$tax_id]['applies']['items']['P'][$cart_id] = true;
if (isset($product['company_id'])) {
if (!isset($subtotal[$tax_id]['group'][$group_key])) {
$subtotal[$tax_id]['group'][$group_key]['products'] = 0;
}
$subtotal[$tax_id]['group'][$group_key]['products'] += $_subtotal;
$priority_stack['products'][$group_key] = -1;
$applied_taxes['products'][$group_key] = 0;
}
}
}
}
// Get shipping taxes
if (!empty($shipping_rates)) {
foreach ($shipping_rates as $shipping_id => $shipping) {
// Calculate taxes for each shipping rate
$taxes = fn_get_shipping_taxes($shipping_id, $shipping_rates, $cart);
$shipping_rates[$shipping_id]['taxed_price'] = 0;
unset($shipping_rates[$shipping_id]['inc_tax']);
// Display shipping with taxes at cart/checkout page
if (!empty($taxes)) {
$shipping_rates[$shipping_id]['taxes'] = array();
$tax = fn_calculate_tax_rates($taxes, fn_format_price($shipping['rate']), 1, $auth, $cart);
$shipping_rates[$shipping_id]['taxes'] = $tax;
if (!empty($tax) && Registry::get('settings.Appearance.cart_prices_w_taxes') == 'Y') {
foreach ($tax as $_id => $_tax) {
if ($_tax['price_includes_tax'] != 'Y') {
$shipping_rates[$shipping_id]['taxed_price'] += $_tax['tax_subtotal'];
}
}
$shipping_rates[$shipping_id]['inc_tax'] = true;
}
if (!empty($shipping_rates[$shipping_id]['rate']) && $shipping_rates[$shipping_id]['taxed_price'] > 0) {
$shipping_rates[$shipping_id]['taxed_price'] += $shipping_rates[$shipping_id]['rate'];
}
}
if (!isset($cart['chosen_shipping'][$group_key]) || $cart['chosen_shipping'][$group_key] != $shipping_id) {
continue;
}
// Add shipping taxes to "tax" array
if (!empty($taxes)) {
foreach ($taxes as $tax_id => $tax) {
if (empty($subtotal[$tax_id])) {
$subtotal[$tax_id] = fn_init_tax_subtotals($tax);
}
$subtotal[$tax_id]['subtotal'] += $shipping['rate'];
$subtotal[$tax_id]['applies']['S'] += $shipping['rate'];
$subtotal[$tax_id]['applies']['items']['S'][$group_key][$shipping_id] = true;
/* if (!isset($subtotal[$tax_id]['groups'][$group_key]['shippings'])) {
$subtotal[$tax_id]['groups'][$group_key]['shippings'] = 0;
}
$subtotal[$tax_id]['groups'][$group_key]['shippings'] += $shipping['rate'];*/
$priority_stack['shippings'][$group_key] = -1;
$applied_taxes['shippings'][$group_key] = 0;
}
}
}
}
if (!empty($subtotal)) {
$subtotal = fn_sort_array_by_key($subtotal, 'priority');
}
// Apply DDC and calculate tax rates
$calculated_taxes = array();
if (empty($priority_stack)) {
$priority_stack['products'][0] = -1;
$priority_stack['shippings'][0] = -1;
$applied_taxes['products'][0] = 0;
$applied_taxes['shippings'][0] = 0;
}
foreach ($subtotal as $tax_id => $_st) {
if (empty($_st['tax_id'])) {
$_st['tax_id'] = $tax_id;
}
$product_tax = fn_calculate_tax_rates(array($_st), fn_format_price($_st['applies']['P'] * $ddc), 1, $auth, $cart);
$shipping_tax = fn_calculate_tax_rates(array($_st), fn_format_price($_st['applies']['S']), 1, $auth, $cart);
if (empty($product_tax) && empty($shipping_tax)) {
continue;
}
if (empty($_st['groups'])) {
$_st['groups'][0]['products'] = $_st['applies']['P'];
$_st['groups'][0]['shippings'] = $_st['applies']['S'];
}
foreach ($_st['groups'] as $group_key => $applies) {
$apply_tax_stack = array('products' => 0, 'shippings' => 0);
if (!isset($priority_stack['products'][$group_key])) {
$priority_stack['products'][$group_key] = -1;
}
if (!isset($priority_stack['shippings'][$group_key])) {
$priority_stack['shippings'][$group_key] = -1;
}
if ($priority_stack['products'][$group_key] < 0 && !empty($applies['products'])) {
$priority_stack['products'][$group_key] = $_st['priority'];
} elseif (!empty($applies['products']) && $priority_stack['products'][$group_key] != $_st['priority']) {
$apply_tax_stack['products'] = $applied_taxes['products'][$group_key];
$priority_stack['products'][$group_key] = $_st['priority'];
}
if ($priority_stack['shippings'][$group_key] < 0 && !empty($applies['shippings'])) {
$priority_stack['shippings'][$group_key] = $_st['priority'];
} elseif (!empty($applies['shippings']) && $priority_stack['shippings'][$group_key] != $_st['priority']) {
$apply_tax_stack['shippings'] = $applied_taxes['shippings'][$group_key];
$priority_stack['shippings'][$group_key] = $_st['priority'];
}
if (empty($calculated_data[$tax_id])) {
$calculated_data[$tax_id] = empty($product_tax) ? reset($shipping_tax) : reset($product_tax);
}
if (!empty($applies['products'])) {
$products_tax = fn_calculate_tax_rates(array($_st), fn_format_price($applies['products'] * $ddc + $apply_tax_stack['products']), 1, $auth, $cart);
} else {
$products_tax[$tax_id]['tax_subtotal'] = 0;
}
if (!empty($applies['shippings'])) {
$shippings_tax = fn_calculate_tax_rates(array($_st), fn_format_price($applies['shippings'] + $apply_tax_stack['shippings']), 1, $auth, $cart);
} else {
$shippings_tax[$tax_id]['tax_subtotal'] = 0;
}
if (!isset($applied_taxes['products'][$group_key])) {
$applied_taxes['products'][$group_key] = 0;
}
if (!isset($applied_taxes['shippings'][$group_key])) {
$applied_taxes['shippings'][$group_key] = 0;
}
if ($_st['price_includes_tax'] != 'Y') {
$applied_taxes['products'][$group_key] += $products_tax[$tax_id]['tax_subtotal'];
$applied_taxes['shippings'][$group_key] += $shippings_tax[$tax_id]['tax_subtotal'];
}
if (!isset($calculated_data[$tax_id]['applies']['P'])) {
$calculated_data[$tax_id]['applies']['P'] = 0;
}
if (!isset($calculated_data[$tax_id]['applies']['S'])) {
$calculated_data[$tax_id]['applies']['S'] = 0;
}
$calculated_data[$tax_id]['applies']['P'] += $products_tax[$tax_id]['tax_subtotal'];
$calculated_data[$tax_id]['applies']['S'] += $shippings_tax[$tax_id]['tax_subtotal'];
$calculated_data[$tax_id]['applies']['items'] = $_st['applies']['items'];
$calculated_data[$tax_id]['tax_subtotal'] = $calculated_data[$tax_id]['applies']['P'] + $calculated_data[$tax_id]['applies']['S'];
}
}
}
/**
* Processes products data after applying products and shipping taxes to cart)
*
* @param array $cart Cart data
* @param array $group_products Products data
* @param array $shipping_rates Shipping rates data
* @param array $auth Auth data
* @param array $calculated_data Payment taxes data
*/
fn_set_hook('calculate_taxes_post', $cart, $group_products, $shipping_rates, $auth, $calculated_data);
return $calculated_data;
}
function fn_calculate_taxes(&$cart, &$cart_products, &$shipping_rates, $auth)
{
$calculated_data = array();
if (Registry::get('settings.General.tax_calculation') == 'unit_price') {
// Tax calculation method based on UNIT PRICE
// Calculate product taxes
foreach ($cart_products as $k => $product) {
$taxes = fn_get_product_taxes($k, $cart, $cart_products);
if (empty($taxes)) {
continue;
}
if (isset($product['subtotal'])) {
$price = fn_format_price($product['subtotal'] / $product['amount']);
$calculated_data['P_' . $k] = fn_calculate_tax_rates($taxes, $price, $product['amount'], $auth, $cart);
$cart_products[$k]['tax_summary'] = array('included' => 0, 'added' => 0, 'total' => 0);
// tax summary for 1 unit of product
// Apply taxes to product subtotal
if (!empty($calculated_data['P_' . $k])) {
foreach ($calculated_data['P_' . $k] as $_k => $v) {
$cart_products[$k]['taxes'][$_k] = $v;
if ($taxes[$_k]['price_includes_tax'] != 'Y') {
$cart_products[$k]['tax_summary']['added'] += $v['tax_subtotal'];
} else {
$cart_products[$k]['tax_summary']['included'] += $v['tax_subtotal'];
}
}
$cart_products[$k]['tax_summary']['total'] = $cart_products[$k]['tax_summary']['added'] + $cart_products[$k]['tax_summary']['included'];
}
}
}
// Calculate shipping taxes
if (!empty($shipping_rates)) {
foreach ($shipping_rates as $shipping_id => $shipping) {
$taxes = fn_get_shipping_taxes($shipping_id, $shipping_rates, $cart);
if (!empty($taxes)) {
$shipping_rates[$shipping_id]['taxes'] = array();
$calculate_rate = true;
if (!empty($cart['shipping'][$shipping_id])) {
foreach ($cart['shipping'][$shipping_id]['rates'] as $k => $v) {
$calculated_data['S_' . $shipping_id . '_' . $k] = fn_calculate_tax_rates($taxes, $v, 1, $auth, $cart);
if (!empty($calculated_data['S_' . $shipping_id . '_' . $k])) {
foreach ($calculated_data['S_' . $shipping_id . '_' . $k] as $__k => $__v) {
if ($taxes[$__k]['price_includes_tax'] != 'Y') {
$cart['display_shipping_cost'] += Registry::get('settings.Appearance.cart_prices_w_taxes') == 'Y' ? $__v['tax_subtotal'] : 0;
$cart['tax_subtotal'] += $__v['tax_subtotal'];
}
if ($cart['stored_taxes'] == 'Y') {
$cart['taxes'][$__k]['applies']['S_' . $shipping_id . '_' . $k] = $__v['tax_subtotal'];
}
}
$shipping_rates[$shipping_id]['taxes']['S_' . $shipping_id . '_' . $k] = $calculated_data['S_' . $shipping_id . '_' . $k];
$calculate_rate = false;
}
}
}
if ($calculate_rate) {
foreach ($shipping['rates'] as $k => $v) {
if (isset($shipping['rates'][$k])) {
$cur_shipping_rates = fn_calculate_tax_rates($taxes, $v, 1, $auth, $cart);
if (!empty($cur_shipping_rates)) {
$shipping_rates[$shipping_id]['taxes']['S_' . $shipping_id . '_' . $k] = $cur_shipping_rates;
}
}
}
}
}
}
}
} else {
// Tax calculation method based on SUBTOTAL
// Calculate discounted subtotal
if (!isset($cart['subtotal_discount'])) {
$cart['subtotal_discount'] = 0;
}
$discounted_subtotal = $cart['original_subtotal'] - $cart['subtotal_discount'];
// Get discount distribution coefficient (DDC) between taxes
$ddc = $discounted_subtotal / $cart['original_subtotal'];
//
// Group subtotal by taxes
//
$subtotal = array();
// Get products taxes
foreach ($cart_products as $k => $product) {
$taxes = fn_get_product_taxes($k, $cart, $cart_products);
if (!empty($taxes)) {
foreach ($taxes as $tax_id => $tax) {
if (empty($subtotal[$tax_id])) {
$subtotal[$tax_id] = $tax;
$subtotal[$tax_id]['subtotal'] = $subtotal[$tax_id]['applies']['P'] = $subtotal[$tax_id]['applies']['S'] = 0;
$subtotal[$tax_id]['applies']['items']['P'] = $subtotal[$tax_id]['applies']['items']['S'] = array();
}
$subtotal[$tax_id]['subtotal'] += $product['subtotal'];
$subtotal[$tax_id]['applies']['P'] += $product['subtotal'];
$subtotal[$tax_id]['applies']['items']['P'][$k] = true;
}
}
}
// Get shipping taxes
if (!empty($shipping_rates)) {
foreach ($shipping_rates as $shipping_id => $shipping) {
// Calculate taxes for each shipping rate
$taxes = fn_get_shipping_taxes($shipping_id, $shipping_rates, $cart);
if (!empty($taxes)) {
$shipping_rates[$shipping_id]['taxes'] = array();
foreach ($shipping['rates'] as $k => $v) {
$tax = fn_calculate_tax_rates($taxes, fn_format_price($v), 1, $auth, $cart);
$shipping_rates[$shipping_id]['taxes']['S_' . $shipping_id . '_' . $k] = $tax;
}
}
if (!isset($cart['shipping'][$shipping_id])) {
continue;
}
if (!empty($taxes)) {
foreach ($taxes as $tax_id => $tax) {
if (empty($subtotal[$tax_id])) {
$subtotal[$tax_id] = $tax;
$subtotal[$tax_id]['subtotal'] = $subtotal[$tax_id]['applies']['P'] = $subtotal[$tax_id]['applies']['S'] = 0;
$subtotal[$tax_id]['applies']['items']['P'] = $subtotal[$tax_id]['applies']['items']['S'] = array();
}
$subtotal[$tax_id]['subtotal'] += array_sum($cart['shipping'][$shipping_id]['rates']);
$subtotal[$tax_id]['applies']['S'] += array_sum($cart['shipping'][$shipping_id]['rates']);
$subtotal[$tax_id]['applies']['items']['S'][$shipping_id] = true;
}
}
}
}
// Apply DDC and calculate tax rates
$calculated_taxes = array();
foreach ($subtotal as $tax_id => $_st) {
if (empty($_st['tax_id'])) {
$_st['tax_id'] = $tax_id;
}
$tax = fn_calculate_tax_rates(array($_st), fn_format_price($_st['applies']['P'] * $ddc + $_st['applies']['S']), 1, $auth, $cart);
if (empty($tax)) {
continue;
}
$calculated_data[$tax_id] = reset($tax);
$products_tax = fn_calculate_tax_rates(array($_st), fn_format_price($_st['applies']['P'] * $ddc), 1, $auth, $cart);
$calculated_data[$tax_id]['applies']['P'] = $products_tax[$tax_id]['tax_subtotal'];
$shipping_tax = fn_calculate_tax_rates(array($_st), fn_format_price($_st['applies']['S']), 1, $auth, $cart);
$calculated_data[$tax_id]['applies']['S'] = $shipping_tax[$tax_id]['tax_subtotal'];
$calculated_data[$tax_id]['tax_subtotal'] = $products_tax[$tax_id]['tax_subtotal'] + $shipping_tax[$tax_id]['tax_subtotal'];
$calculated_data[$tax_id]['applies']['items'] = $_st['applies']['items'];
}
}
fn_apply_calculated_taxes($calculated_data, $cart);
return false;
}