woocommerce/classes/class-wc-tax.php

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<?php
/**
* Performs tax calculations and loads tax rates.
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*
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* @class WC_Tax
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* @version 1.6.4
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* @package WooCommerce/Classes
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* @author WooThemes
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*/
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class WC_Tax {
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/** @var array Contains an array of tax rates. */
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var $rates;
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/** @var array Contains an array of parsed tax rates with counties/states as keys. */
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var $parsed_rates;
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/**
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* Get the tax rates as an array.
*
* @access public
* @return array
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*/
function get_tax_rates() {
if ( ! is_array( $this->parsed_rates ) ) {
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global $woocommerce;
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$tax_rates = array_filter( (array) get_option('woocommerce_tax_rates') );
$local_tax_rates = array_filter( (array) get_option('woocommerce_local_tax_rates') );
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$parsed_rates = array();
$flat_rates = array();
$index = 0;
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if ( ! empty( $tax_rates ) ) foreach( $tax_rates as $rate ) :
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// Standard Rate?
if ( isset( $rate['class'] ) && !$rate['class']) $rate['class'] = '*';
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// Add entry for each country/state - each will hold all matching rates
if ( isset( $rate['countries'] ) && $rate['countries']) foreach ($rate['countries'] as $country => $states) :
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if ($states) :
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foreach ($states as $state) :
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if (!$rate['label']) :
$rate['label'] = $woocommerce->countries->tax_or_vat();
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// Add % to label
if ( $rate['rate'] > 0 || $rate['rate'] === 0 ) :
$rate['label'] .= ' ('. rtrim(rtrim($rate['rate'], '0'), '.') . '%)';
endif;
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endif;
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$flat_rates[$index] = $rate;
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$parsed_rates[$country][$state][$rate['class']][$index] = array(
'label' => $rate['label'],
'rate' => $rate['rate'],
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'shipping' => $rate['shipping'],
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'compound' => $rate['compound']
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);
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$index++;
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endforeach;
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endif;
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endforeach;
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endforeach;
if ( ! empty( $local_tax_rates ) ) foreach( $local_tax_rates as $rate ) :
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// Standard Rate?
if (!$rate['class']) $rate['class'] = '*';
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if ( isset( $rate['label'] ) && !$rate['label']) :
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$rate['label'] = $woocommerce->countries->tax_or_vat();
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// Add % to label
if ( $rate['rate'] > 0 || $rate['rate'] === 0 ) :
$rate['label'] .= ' ('. rtrim(rtrim($rate['rate'], '0'), '.') . '%)';
endif;
endif;
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$flat_rates[$index] = $rate;
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$parsed_rates[$rate['country']][$rate['state']][$rate['class']][$index] = array(
'label' => $rate['label'],
'rate' => $rate['rate'],
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'postcode' => array_map('strtoupper', (array) $rate['postcode']),
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'shipping' => $rate['shipping'],
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'compound' => $rate['compound']
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);
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$index++;
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endforeach;
$this->rates = $flat_rates;
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$this->parsed_rates = $parsed_rates;
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do_action( 'woocommerce_get_tax_rates', $this );
}
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}
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/**
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* Searches for all matching country/state/postcode tax rates.
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*
* @since 1.4
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* @param string country
* @param string state
* @param string postcode
* @param string Tax Class
* @return array
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*/
function find_rates( $country = '', $state = '', $postcode = '', $tax_class = '' ) {
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$this->get_tax_rates();
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if ( ! $country ) return array();
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if ( ! $state ) $state = '*';
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$tax_class = sanitize_title($tax_class);
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if ( ! $tax_class ) $tax_class = '*';
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$found_rates = array();
// Look for a state specific rule
if ( isset( $this->parsed_rates[ $country ][ $state ][ $tax_class ] ) || isset( $this->parsed_rates[ $country ][ $state ][ '*' ] ) ) {
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// Look for tax class specific rule
if ( isset( $this->parsed_rates[ $country ][ $state ][ $tax_class ] ) )
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$found_rates = $this->parsed_rates[ $country ][ $state ][ $tax_class ];
else
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$found_rates = $this->parsed_rates[ $country ][ $state ][ '*' ];
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// Default to * if not state specific rules are found
} elseif ( isset( $this->parsed_rates[ $country ][ '*' ] ) ) {
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// Look for tax class specific rule
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if ( isset( $this->parsed_rates[ $country ][ '*' ][ $tax_class ] ) )
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$found_rates = $this->parsed_rates[ $country ][ '*' ][ $tax_class ];
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elseif ( isset( $this->parsed_rates[ $country ][ '*' ][ '*' ] ) )
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$found_rates = $this->parsed_rates[ $country ][ '*' ][ '*' ];
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}
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// Now we have an array of matching rates, lets filter this based on postcode
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$matched_tax_rates = array();
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if ($found_rates) foreach ($found_rates as $key => $rate) :
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if (isset($rate['postcode'])) :
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// Local rate
if ($postcode) :
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// Check if postcode matches up
if (in_array($postcode, $rate['postcode']) || sizeof($rate['postcode'])==0) $matched_tax_rates[$key] = $rate;
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// Check postcode ranges
if (is_numeric($postcode)) :
foreach ($rate['postcode'] as $rate_postcode) :
if (strstr($rate_postcode, '-')) :
$parts = array_map('trim', explode('-', $rate_postcode));
if (sizeof($parts)==2 && is_numeric($parts[0]) && is_numeric($parts[1])) :
if ($postcode>=$parts[0] && $postcode<=$parts[1]) $matched_tax_rates[$key] = $rate;
endif;
endif;
endforeach;
endif;
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endif;
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else :
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// Standard rate
$matched_tax_rates[$key] = $rate;
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endif;
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endforeach;
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$matched_tax_rates = apply_filters('woocommerce_matched_tax_rates', $matched_tax_rates, $this->parsed_rates, $country, $state, $postcode, $tax_class );
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return $matched_tax_rates;
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}
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/**
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* Get's an array of matching rates for a tax class.
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*
* @param object Tax Class
* @return array
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*/
function get_rates( $tax_class = '' ) {
global $woocommerce;
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$this->get_tax_rates();
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$tax_class = sanitize_title( $tax_class );
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/* Checkout uses customer location for the tax rates. Also, if shipping has been calculated, use the customers address. */
if ( ( defined('WOOCOMMERCE_CHECKOUT') && WOOCOMMERCE_CHECKOUT ) || $woocommerce->customer->has_calculated_shipping() ) {
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$country = $woocommerce->customer->get_shipping_country();
$state = $woocommerce->customer->get_shipping_state();
$postcode = $woocommerce->customer->get_shipping_postcode();
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$matched_tax_rates = $this->find_rates( $country, $state, $postcode, $tax_class );
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return $matched_tax_rates;
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} else {
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return $this->get_shop_base_rate( $tax_class );
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}
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}
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/**
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* Get's an array of matching rates for the shop's base country.
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*
* @param string Tax Class
* @return array
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*/
function get_shop_base_rate( $tax_class = '' ) {
global $woocommerce;
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$this->get_tax_rates();
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$country = $woocommerce->countries->get_base_country();
$state = $woocommerce->countries->get_base_state();
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return $this->find_rates( $country, $state, '', $tax_class );
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}
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/**
* Deprecated before new tax system - added to stop errors before people upgrade.
*
* @deprecated 1.4
* @access public
* @return void
*/
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function get_shipping_tax_rate() {
_deprecated_function( 'get_shipping_tax_rate', '1.4' );
}
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/**
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* Gets an array of matching shipping tax rates for a given class.
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*
* @param string Tax Class
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* @return mixed
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*/
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function get_shipping_tax_rates( $tax_class = null ) {
global $woocommerce;
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$this->get_tax_rates();
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if ( ( defined('WOOCOMMERCE_CHECKOUT') && WOOCOMMERCE_CHECKOUT ) || $woocommerce->customer->has_calculated_shipping() ) {
$country = $woocommerce->customer->get_shipping_country();
$state = $woocommerce->customer->get_shipping_state();
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$postcode = $woocommerce->customer->get_shipping_postcode();
} else {
$country = $woocommerce->countries->get_base_country();
$state = $woocommerce->countries->get_base_state();
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$postcode = '';
}
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// If we are here then shipping is taxable - work it out
if ( ! is_null($tax_class) ) :
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$matched_tax_rates = array();
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// This will be per item shipping
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$rates = $this->find_rates( $country, $state, $postcode, $tax_class );
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if ($rates) foreach ($rates as $key => $rate) :
if (isset($rate['shipping']) && $rate['shipping']=='yes') :
$matched_tax_rates[$key] = $rate;
endif;
endforeach;
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if (sizeof($matched_tax_rates)==0) :
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// Get standard rate
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$rates = $this->find_rates( $country, $state, $postcode );
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if ($rates) foreach ($rates as $key => $rate) :
if (isset($rate['shipping']) && $rate['shipping']=='yes') :
$matched_tax_rates[$key] = $rate;
endif;
endforeach;
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endif;
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return $matched_tax_rates;
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else :
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// This will be per order shipping - loop through the order and find the highest tax class rate
$found_tax_classes = array();
$matched_tax_rates = array();
$rates = false;
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// Loop cart and find the highest tax band
if (sizeof($woocommerce->cart->get_cart())>0) : foreach ($woocommerce->cart->get_cart() as $item) :
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$found_tax_classes[] = $item['data']->get_tax_class();
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endforeach; endif;
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$found_tax_classes = array_unique( $found_tax_classes );
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// If multiple classes are found, use highest
if (sizeof($found_tax_classes)>1) :
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if (in_array('', $found_tax_classes)) :
$rates = $this->find_rates( $country, $state, $postcode );
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else :
$tax_classes = array_filter(array_map('trim', explode("\n", get_option('woocommerce_tax_classes'))));
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foreach ($tax_classes as $tax_class) :
if (in_array( $tax_class, $found_tax_classes )) :
$rates = $this->find_rates( $country, $state, $postcode, $tax_class );
break;
endif;
endforeach;
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endif;
// If a single tax class is found, use it
elseif (sizeof($found_tax_classes)==1) :
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$rates = $this->find_rates( $country, $state, $postcode, $found_tax_classes[0] );
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endif;
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// If no classes are found, use standard rates
if (!$rates) :
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$rates = $this->find_rates( $country, $state, $postcode );
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endif;
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if ($rates) foreach ($rates as $key => $rate) :
if (isset($rate['shipping']) && $rate['shipping']=='yes') :
$matched_tax_rates[$key] = $rate;
endif;
endforeach;
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return $matched_tax_rates;
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endif;
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return array(); // return false
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}
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/**
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* Calculate the tax using a passed array of rates.
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*
* @param float price
* @param array rates
* @param bool passed price includes tax
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* @return array array of rates/amounts
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*/
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function calc_tax( $price, $rates, $price_includes_tax = true, $supress_rounding = false ) {
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$price = $price * 100; // To avoid float rounding errors, work with integers (pence)
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// Taxes array
$taxes = array();
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// Price inc tax
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if ( $price_includes_tax ) {
$regular_tax_rates = $compound_tax_rates = 0;
foreach ( $rates as $key => $rate )
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if ($rate['compound']=='yes')
$compound_tax_rates = $compound_tax_rates + $rate['rate'];
else
$regular_tax_rates = $regular_tax_rates + $rate['rate'];
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$regular_tax_rate = 1 + ( $regular_tax_rates / 100 );
$compound_tax_rate = 1 + ( $compound_tax_rates / 100 );
$tax_rate = $regular_tax_rate * $compound_tax_rate;
$non_compound_price = ( $price / $compound_tax_rate );
foreach ( $rates as $key => $rate ) {
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$the_rate = $rate['rate'] / 100;
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if ( $rate['compound'] == 'yes' )
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$tax_amount = ( $the_rate / $compound_tax_rate ) * $price;
else
$tax_amount = ( $the_rate / $regular_tax_rate ) * $non_compound_price;
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// ADVANCED: Allow third parties to modifiy this rate
$tax_amount = apply_filters( 'woocommerce_price_inc_tax_amount', $tax_amount, $key, $rate, $price, $non_compound_price );
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// Back to pounds
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$tax_amount = ( $tax_amount / 100 );
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// Rounding
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if ( get_option( 'woocommerce_tax_round_at_subtotal' ) == 'no' && ! $supress_rounding )
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$tax_amount = round( $tax_amount, get_option( 'woocommerce_price_num_decimals' ) );
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// Add rate
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if ( ! isset( $taxes[$key] ) )
$taxes[ $key ] = $tax_amount;
else
$taxes[ $key ] += $tax_amount;
}
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// Prices ex tax
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} else {
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// Multiple taxes
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foreach ( $rates as $key => $rate ) {
if ( $rate['compound'] == 'yes' )
continue;
$tax_amount = $price * ( $rate['rate'] / 100 );
// ADVANCED: Allow third parties to modifiy this rate
$tax_amount = apply_filters( 'woocommerce_price_ex_tax_amount', $tax_amount, $key, $rate, $price );
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// Back to pounds
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$tax_amount = ( $tax_amount / 100 );
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// Rounding
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if ( get_option( 'woocommerce_tax_round_at_subtotal' ) == 'no' && ! $supress_rounding )
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$tax_amount = round( $tax_amount, get_option( 'woocommerce_price_num_decimals' ) );
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// Add rate
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if ( ! isset( $taxes[ $key ] ) )
$taxes[ $key ] = $tax_amount;
else
$taxes[ $key ] += $tax_amount;
}
$pre_compound_total = array_sum( $taxes );
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// Compound taxes
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foreach ( $rates as $key => $rate ) {
if ( $rate['compound'] == 'no' )
continue;
$the_price_inc_tax = $price + ( $pre_compound_total * 100 );
$tax_amount = $the_price_inc_tax * ( $rate['rate'] / 100 );
// ADVANCED: Allow third parties to modifiy this rate
$tax_amount = apply_filters( 'woocommerce_price_ex_tax_amount', $tax_amount, $key, $rate, $price, $the_price_inc_tax, $pre_compound_total );
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// Back to pounds
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$tax_amount = ( $tax_amount / 100 );
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// Rounding
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if ( get_option( 'woocommerce_tax_round_at_subtotal' ) == 'no' && ! $supress_rounding )
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$tax_amount = round( $tax_amount, get_option( 'woocommerce_price_num_decimals' ) );
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// Add rate
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if ( ! isset( $taxes[ $key ] ) )
$taxes[ $key ] = $tax_amount;
else
$taxes[ $key ] += $tax_amount;
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}
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}
return apply_filters( 'woocommerce_calc_tax', $taxes, $price, $rates, $price_includes_tax, $supress_rounding );
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}
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/**
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* Calculate the shipping tax using a passed array of rates.
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*
* @param int Price
* @param int Taxation Rate
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* @return int
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*/
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function calc_shipping_tax( $price, $rates ) {
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// Taxes array
$taxes = array();
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// Multiple taxes
foreach ($rates as $key => $rate) :
if ($rate['compound']=='yes') continue;
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$tax_amount = $price * ($rate['rate']/100);
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// Add rate
if (!isset($taxes[$key])) $taxes[$key] = $tax_amount; else $taxes[$key] += $tax_amount;
endforeach;
$pre_compound_total = array_sum($taxes);
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// Compound taxes
foreach ($rates as $key => $rate) :
if ($rate['compound']=='no') continue;
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$the_price_inc_tax = $price + $pre_compound_total;
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$tax_amount = $the_price_inc_tax * ($rate['rate']/100);
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// Add rate
if (!isset($taxes[$key])) $taxes[$key] = $tax_amount; else $taxes[$key] += $tax_amount;
endforeach;
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return $taxes;
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}
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/**
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* Return true/false depending on if a rate is a compound rate.
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*
* @param int key
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* @return bool
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*/
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function is_compound( $key ) {
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return ( isset( $this->rates[$key] ) && $this->rates[$key]['compound'] == 'yes' ) ? true : false;
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}
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/**
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* Return a given rates label.
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*
* @param int key
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* @return string
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*/
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function get_rate_label( $key ) {
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if ( isset( $this->rates[ $key ] ) && $this->rates[ $key ]['label'] ) return $this->rates[ $key ]['label'];
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return '';
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}
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/**
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* Round tax lines and return the sum.
*
* @param array
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* @return float
*/
function get_tax_total( $taxes ) {
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return array_sum( array_map( array(&$this, 'round'), $taxes ) );
}
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/**
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* Round to currency DP.
*/
function round( $in ) {
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return round( $in, get_option( 'woocommerce_price_num_decimals' ) );
}
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}
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/**
* woocommerce_tax class.
*
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* @extends WC_Tax
* @deprecated 1.4
* @package WooCommerce/Classes
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*/
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class woocommerce_tax extends WC_Tax {
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public function __construct() {
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_deprecated_function( 'woocommerce_tax', '1.4', 'WC_Tax()' );
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}
}