/**
* @param array $items order items to modify
* @param array $params 'billing' => array(...), 'shipping' => array(...), 'discount_rate' => float
* @return array : tax_id => array ( rate => float, included => bool, name => string )
*/
public static function apply(&$items, $params, $currency = null)
{
$addresses = array_intersect_key($params, array('billing' => 1, 'shipping' => 1));
$discount_rate = ifset($params['discount_rate'], 0);
$tax_ids = array();
$parent_tax_id = null;
foreach ($items as &$i) {
if ($i['type'] == 'product') {
$parent_tax_id = isset($i['product']['tax_id']) ? $i['product']['tax_id'] : (isset($i['tax_id']) ? $i['tax_id'] : 0);
}
if (!empty($i['product']['tax_id'])) {
$tax_ids[] = $i['tax_id'] = $i['product']['tax_id'];
} elseif (isset($i['service']['tax_id'])) {
// inherit from product
if ($i['service']['tax_id'] === '0') {
if ($parent_tax_id) {
$tax_ids[] = $i['tax_id'] = $parent_tax_id;
}
} else {
$tax_ids[] = $i['tax_id'] = $i['service']['tax_id'];
}
} elseif (!empty($i['tax_id'])) {
$tax_ids[] = $i['tax_id'];
}
$i['tax'] = 0;
$i['tax_percent'] = 0;
$i['tax_included'] = 0;
}
unset($i);
if (empty($tax_ids)) {
return array();
}
$result = array();
$tm = new shopTaxModel();
$trm = new shopTaxRegionsModel();
$taxes = $tm->getById($tax_ids);
foreach ($taxes as $t) {
$result[$t['id']] = array('rate' => 0.0, 'included' => $t['included'], 'name' => $t['name'], 'sum_included' => 0.0, 'sum' => 0.0);
// Check if there are rates based on country and region
$result[$t['id']]['rate'] = $trm->getByTaxAddress($t['id'], $addresses[$t['address_type']]);
}
// Rates by zip code override rates by region, when applicable
$main_country = wa()->getSetting('country');
foreach (array('shipping', 'billing') as $addr_type) {
// ZIP-based rates are only applied to main shop country
if (empty($addresses[$addr_type]['zip']) || !empty($addresses[$addr_type]['country']) && $addresses[$addr_type]['country'] !== $main_country) {
continue;
}
$tzcm = new shopTaxZipCodesModel();
foreach ($tzcm->getByZip($addresses[$addr_type]['zip'], $addr_type, $tax_ids) as $tax_id => $rate) {
$result[$tax_id]['rate'] = $rate;
$result[$tax_id]['name'] = $taxes[$tax_id]['name'];
}
}
// Compute tax values for each item, and total tax
foreach ($items as &$i) {
$tax_id = ifempty($i['tax_id']);
$i['tax_percent'] = ifset($result[$tax_id]['rate'], 0.0);
$i['tax_included'] = ifset($result[$tax_id]['included']);
$p = shop_currency((1 - $discount_rate) * $i['price'] * $i['quantity'], $i['currency'], $currency, false);
$r = ifset($result[$tax_id]['rate'], 0.0);
if ($i['tax_included']) {
$i['tax'] = $p * $r / (100.0 + $r);
} else {
$i['tax'] = $p * $r / 100.0;
}
if ($i['tax_included']) {
$result[$tax_id]['sum_included'] += $i['tax'];
} elseif ($i['tax']) {
$result[$tax_id]['sum'] += $i['tax'];
}
}
unset($i);
return $result;
}
