541 lines
14 KiB
PHP
541 lines
14 KiB
PHP
<?php
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/**
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* Performs tax calculations and loads tax rates.
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*
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* @class WC_Tax
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* @package WooCommerce
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* @category Class
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* @author WooThemes
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*/
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class WC_Tax {
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var $rates; // Simple array of rates
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var $parsed_rates; // Parsed into array with counties/states as keys
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/**
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* Get the tax rates as an array
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*/
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function get_tax_rates() {
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if (!is_array($this->parsed_rates)) :
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global $woocommerce;
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$tax_rates = (array) get_option('woocommerce_tax_rates');
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$local_tax_rates = (array) get_option('woocommerce_local_tax_rates');
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$parsed_rates = array();
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$flat_rates = array();
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$index = 0;
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if (!empty($tax_rates)) foreach( $tax_rates as $rate ) :
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// Standard Rate?
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if ( isset( $rate['class'] ) && !$rate['class']) $rate['class'] = '*';
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// Add entry for each country/state - each will hold all matching rates
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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']) :
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$rate['label'] = $woocommerce->countries->tax_or_vat();
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// Add % to label
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if ( $rate['rate'] > 0 || $rate['rate'] === 0 ) :
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$rate['label'] .= ' ('. rtrim(rtrim($rate['rate'], '0'), '.') . '%)';
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endif;
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endif;
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$flat_rates[$index] = $rate;
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$parsed_rates[$country][$state][$rate['class']][$index] = array(
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'label' => $rate['label'],
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'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;
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if ( isset( $rate['countries'] ) && !empty($local_tax_rates)) foreach( $local_tax_rates as $rate ) :
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// Standard Rate?
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if (!$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
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if ( $rate['rate'] > 0 || $rate['rate'] === 0 ) :
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$rate['label'] .= ' ('. rtrim(rtrim($rate['rate'], '0'), '.') . '%)';
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endif;
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endif;
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$flat_rates[$index] = $rate;
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$parsed_rates[$rate['country']][$rate['state']][$rate['class']][$index] = array(
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'label' => $rate['label'],
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'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;
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$this->rates = $flat_rates;
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$this->parsed_rates = $parsed_rates;
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endif;
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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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*
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* @since 1.4
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* @param string country
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* @param string state
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* @param string postcode
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* @param string Tax Class
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* @return array
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*/
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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();
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// Look for a state specific rule
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if (isset($this->parsed_rates[ $country ][ $state ])) :
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// Look for tax class specific rule
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if (isset($this->parsed_rates[ $country ][ $state ][ $tax_class ])) :
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$found_rates = $this->parsed_rates[ $country ][ $state ][ $tax_class ];
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else :
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$found_rates = $this->parsed_rates[ $country ][ $state ][ '*' ];
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endif;
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// Default to * if not state specific rules are found
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elseif (isset($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 ][ '*' ][ $tax_class ];
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else :
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$found_rates = $this->parsed_rates[ $country ][ '*' ][ '*' ];
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endif;
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endif;
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// Now we have an array of matching rates, lets filter this based on postcode
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$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
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if ($postcode) :
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// Check if postcode matches up
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if (in_array($postcode, $rate['postcode']) || sizeof($rate['postcode'])==0) $matched_tax_rates[$key] = $rate;
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// Check postcode ranges
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if (is_numeric($postcode)) :
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foreach ($rate['postcode'] as $rate_postcode) :
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if (strstr($rate_postcode, '-')) :
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$parts = array_map('trim', explode('-', $rate_postcode));
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if (sizeof($parts)==2 && is_numeric($parts[0]) && is_numeric($parts[1])) :
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if ($postcode>=$parts[0] && $postcode<=$parts[1]) $matched_tax_rates[$key] = $rate;
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endif;
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endif;
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endforeach;
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endif;
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endif;
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else :
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// Standard rate
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$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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*
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* @param object Tax Class
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* @return array
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*/
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function get_rates( $tax_class = '' ) {
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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, otherwise use store base rate */
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if ( defined('WOOCOMMERCE_CHECKOUT') && WOOCOMMERCE_CHECKOUT ) :
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$country = $woocommerce->customer->get_shipping_country();
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$state = $woocommerce->customer->get_shipping_state();
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$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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endif;
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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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*
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* @param string Tax Class
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* @return array
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*/
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function get_shop_base_rate( $tax_class = '' ) {
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global $woocommerce;
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$this->get_tax_rates();
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$country = $woocommerce->countries->get_base_country();
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$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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/** Depreciated before new tax system - added to stop errors before people upgrade */
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function get_shipping_tax_rate() {
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_deprecated_function( 'get_shipping_tax_rate', '1.4' );
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}
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/**
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* Gets an array of matching shipping tax rates for a given class
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*
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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 ) {
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global $woocommerce;
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$this->get_tax_rates();
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if (defined('WOOCOMMERCE_CHECKOUT') && WOOCOMMERCE_CHECKOUT) :
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$country = $woocommerce->customer->get_shipping_country();
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$state = $woocommerce->customer->get_shipping_state();
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$postcode = $woocommerce->customer->get_shipping_postcode();
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else :
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$country = $woocommerce->countries->get_base_country();
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$state = $woocommerce->countries->get_base_state();
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$postcode = '';
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endif;
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// If we are here then shipping is taxable - work it out
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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 => $rate) :
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if (isset($rate['shipping']) && $rate['shipping']=='yes') :
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$matched_tax_rates[$key] = $rate;
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endif;
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endforeach;
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if (sizeof($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 => $rate) :
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if (isset($rate['shipping']) && $rate['shipping']=='yes') :
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$matched_tax_rates[$key] = $rate;
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endif;
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endforeach;
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endif;
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return $matched_tax_rates;
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else :
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// This will be per order shipping - loop through the order and find the highest tax class rate
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$found_tax_classes = array();
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$matched_tax_rates = array();
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$rates = false;
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// Loop cart and find the highest tax band
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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( $found_tax_classes );
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// If multiple classes are found, use highest
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if (sizeof($found_tax_classes)>1) :
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if (in_array('', $found_tax_classes)) :
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$rates = $this->find_rates( $country, $state, $postcode );
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else :
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$tax_classes = array_filter(array_map('trim', explode("\n", get_option('woocommerce_tax_classes'))));
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foreach ($tax_classes as $tax_class) :
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if (in_array( $tax_class, $found_tax_classes )) :
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$rates = $this->find_rates( $country, $state, $postcode, $tax_class );
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break;
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endif;
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endforeach;
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endif;
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// If a single tax class is found, use it
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elseif (sizeof($found_tax_classes)==1) :
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$rates = $this->find_rates( $country, $state, $postcode, $found_tax_classes[0] );
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endif;
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// If no classes are found, use standard rates
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if (!$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 => $rate) :
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if (isset($rate['shipping']) && $rate['shipping']=='yes') :
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$matched_tax_rates[$key] = $rate;
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endif;
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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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*
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* @param float price
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* @param array rates
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* @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, $price_includes_tax = true ) {
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$price = $price * 100; // To avoid float rounding errors, work with integers (pence)
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// Taxes array
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$taxes = array();
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// Price inc tax
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if ($price_includes_tax) :
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$regular_tax_rates = 0;
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$compound_tax_rates = 0;
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foreach ($rates as $key => $rate) :
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if ($rate['compound']=='yes')
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$compound_tax_rates = $compound_tax_rates + $rate['rate'];
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else
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$regular_tax_rates = $regular_tax_rates + $rate['rate'];
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endforeach;
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$regular_tax_rate = 1 + ($regular_tax_rates / 100);
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$compound_tax_rate = 1 + ($compound_tax_rates / 100);
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$tax_rate = $regular_tax_rate * $compound_tax_rate;
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$non_compound_price = ($price/$compound_tax_rate);
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// $price = ($x * $regular_tax_rate) * $compound_tax_rate;
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foreach ($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 ) * $price;
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else
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$tax_amount = ( $the_rate / $regular_tax_rate ) * $non_compound_price;
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// Back to pounds
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$tax_amount = ($tax_amount / 100);
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// Rounding
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if ( get_option( 'woocommerce_tax_round_at_subtotal' ) == 'no' ) :
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$tax_amount = round( $tax_amount, 2 );
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endif;
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// Add rate
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if (!isset($taxes[$key])) $taxes[$key] = $tax_amount; else $taxes[$key] += $tax_amount;
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endforeach;
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// Prices ex tax
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else :
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// Multiple taxes
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foreach ($rates as $key => $rate) :
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if ($rate['compound']=='yes') continue;
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$tax_amount = $price * ($rate['rate']/100);
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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' ) :
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$tax_amount = round( $tax_amount, 2 );
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endif;
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// Add rate
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if (!isset($taxes[$key])) $taxes[$key] = $tax_amount; else $taxes[$key] += $tax_amount;
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endforeach;
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$pre_compound_total = array_sum($taxes);
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// Compound taxes
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foreach ($rates as $key => $rate) :
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if ($rate['compound']=='no') continue;
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$the_price_inc_tax = $price + ($pre_compound_total * 100);
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$tax_amount = $the_price_inc_tax * ($rate['rate']/100);
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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' ) :
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$tax_amount = round( $tax_amount, 2 );
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endif;
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// Add rate
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if (!isset($taxes[$key])) $taxes[$key] = $tax_amount; else $taxes[$key] += $tax_amount;
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endforeach;
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endif;
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return $taxes;
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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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*
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* @param int Price
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* @param int Taxation Rate
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* @return int
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*/
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function calc_shipping_tax( $price, $rates ) {
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// Taxes array
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$taxes = array();
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// Multiple taxes
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foreach ($rates as $key => $rate) :
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if ($rate['compound']=='yes') continue;
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$tax_amount = $price * ($rate['rate']/100);
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// Add rate
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if (!isset($taxes[$key])) $taxes[$key] = $tax_amount; else $taxes[$key] += $tax_amount;
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endforeach;
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$pre_compound_total = array_sum($taxes);
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// Compound taxes
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foreach ($rates as $key => $rate) :
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if ($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
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if (!isset($taxes[$key])) $taxes[$key] = $tax_amount; else $taxes[$key] += $tax_amount;
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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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*
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* @param int key
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* @return bool
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*/
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function is_compound( $key ) {
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if (isset($this->rates[$key]) && $this->rates[$key]['compound']=='yes') return true;
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return false;
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}
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/**
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* Return a given rates label
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*
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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
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*
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* @param array
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* @return float
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*/
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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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/**
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* Round to 2 DP
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*/
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function round( $in ) {
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return round($in, 2);
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}
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}
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/** Depreciated */
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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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}
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}
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