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<?php
/**
* Tax calculation and rate finding class.
*
* @package Kkart\Classes
*/
use Automattic\Kkart\Utilities\NumberUtil;
defined( 'ABSPATH' ) || exit;
/**
* Performs tax calculations and loads tax rates
*
* @class KKART_Tax
*/
class KKART_Tax {
/**
* Precision.
*
* @var int
*/
public static $precision;
/**
* Round at subtotal.
*
* @var bool
*/
public static $round_at_subtotal = false;
/**
* Load options.
*/
public static function init() {
self::$precision = kkart_get_rounding_precision();
self::$round_at_subtotal = 'yes' === get_option( 'kkart_tax_round_at_subtotal' );
}
/**
* When the kkart_tax_classes option is changed, remove any orphan rates.
*
* @deprecated 3.7.0
* @param string $old_value Old rates value.
* @param string $value New rates value.
*/
public static function maybe_remove_tax_class_rates( $old_value, $value ) {
kkart_deprecated_function( 'KKART_Tax::maybe_remove_tax_class_rates', '3.7', 'KKART_Tax::delete_tax_class_by' );
$tax_classes = array_filter( array_map( 'trim', explode( "\n", $value ) ) );
$existing_tax_classes = self::get_tax_classes();
$removed = array_diff( $existing_tax_classes, $tax_classes );
foreach ( $removed as $name ) {
self::delete_tax_class_by( 'name', $name );
}
}
/**
* Calculate tax for a line.
*
* @param float $price Price to calc tax on.
* @param array $rates Rates to apply.
* @param boolean $price_includes_tax Whether the passed price has taxes included.
* @param boolean $deprecated Whether to suppress any rounding from taking place. No longer used here.
* @return array Array of rates + prices after tax.
*/
public static function calc_tax( $price, $rates, $price_includes_tax = false, $deprecated = false ) {
if ( $price_includes_tax ) {
$taxes = self::calc_inclusive_tax( $price, $rates );
} else {
$taxes = self::calc_exclusive_tax( $price, $rates );
}
return apply_filters( 'kkart_calc_tax', $taxes, $price, $rates, $price_includes_tax, $deprecated );
}
/**
* Calculate the shipping tax using a passed array of rates.
*
* @param float $price Shipping cost.
* @param array $rates Taxation Rate.
* @return array
*/
public static function calc_shipping_tax( $price, $rates ) {
$taxes = self::calc_exclusive_tax( $price, $rates );
return apply_filters( 'kkart_calc_shipping_tax', $taxes, $price, $rates );
}
/**
* Round to precision.
*
* Filter example: to return rounding to .5 cents you'd use:
*
* function euro_5cent_rounding( $in ) {
* return round( $in / 5, 2 ) * 5;
* }
* add_filter( 'kkart_tax_round', 'euro_5cent_rounding' );
*
* @param float|int $in Value to round.
* @return float
*/
public static function round( $in ) {
return apply_filters( 'kkart_tax_round', NumberUtil::round( $in, kkart_get_rounding_precision() ), $in );
}
/**
* Calc tax from inclusive price.
*
* @param float $price Price to calculate tax for.
* @param array $rates Array of tax rates.
* @return array
*/
public static function calc_inclusive_tax( $price, $rates ) {
$taxes = array();
$compound_rates = array();
$regular_rates = array();
// Index array so taxes are output in correct order and see what compound/regular rates we have to calculate.
foreach ( $rates as $key => $rate ) {
$taxes[ $key ] = 0;
if ( 'yes' === $rate['compound'] ) {
$compound_rates[ $key ] = $rate['rate'];
} else {
$regular_rates[ $key ] = $rate['rate'];
}
}
$compound_rates = array_reverse( $compound_rates, true ); // Working backwards.
$non_compound_price = $price;
foreach ( $compound_rates as $key => $compound_rate ) {
$tax_amount = apply_filters( 'kkart_price_inc_tax_amount', $non_compound_price - ( $non_compound_price / ( 1 + ( $compound_rate / 100 ) ) ), $key, $rates[ $key ], $price );
$taxes[ $key ] += $tax_amount;
$non_compound_price = $non_compound_price - $tax_amount;
}
// Regular taxes.
$regular_tax_rate = 1 + ( array_sum( $regular_rates ) / 100 );
foreach ( $regular_rates as $key => $regular_rate ) {
$the_rate = ( $regular_rate / 100 ) / $regular_tax_rate;
$net_price = $price - ( $the_rate * $non_compound_price );
$tax_amount = apply_filters( 'kkart_price_inc_tax_amount', $price - $net_price, $key, $rates[ $key ], $price );
$taxes[ $key ] += $tax_amount;
}
/**
* Round all taxes to precision (4DP) before passing them back. Note, this is not the same rounding
* as in the cart calculation class which, depending on settings, will round to 2DP when calculating
* final totals. Also unlike that class, this rounds .5 up for all cases.
*/
$taxes = array_map( array( __CLASS__, 'round' ), $taxes );
return $taxes;
}
/**
* Calc tax from exclusive price.
*
* @param float $price Price to calculate tax for.
* @param array $rates Array of tax rates.
* @return array
*/
public static function calc_exclusive_tax( $price, $rates ) {
$taxes = array();
if ( ! empty( $rates ) ) {
foreach ( $rates as $key => $rate ) {
if ( 'yes' === $rate['compound'] ) {
continue;
}
$tax_amount = $price * ( $rate['rate'] / 100 );
$tax_amount = apply_filters( 'kkart_price_ex_tax_amount', $tax_amount, $key, $rate, $price ); // ADVANCED: Allow third parties to modify this rate.
if ( ! isset( $taxes[ $key ] ) ) {
$taxes[ $key ] = $tax_amount;
} else {
$taxes[ $key ] += $tax_amount;
}
}
$pre_compound_total = array_sum( $taxes );
// Compound taxes.
foreach ( $rates as $key => $rate ) {
if ( 'no' === $rate['compound'] ) {
continue;
}
$the_price_inc_tax = $price + ( $pre_compound_total );
$tax_amount = $the_price_inc_tax * ( $rate['rate'] / 100 );
$tax_amount = apply_filters( 'kkart_price_ex_tax_amount', $tax_amount, $key, $rate, $price, $the_price_inc_tax, $pre_compound_total ); // ADVANCED: Allow third parties to modify this rate.
if ( ! isset( $taxes[ $key ] ) ) {
$taxes[ $key ] = $tax_amount;
} else {
$taxes[ $key ] += $tax_amount;
}
$pre_compound_total = array_sum( $taxes );
}
}
/**
* Round all taxes to precision (4DP) before passing them back. Note, this is not the same rounding
* as in the cart calculation class which, depending on settings, will round to 2DP when calculating
* final totals. Also unlike that class, this rounds .5 up for all cases.
*/
$taxes = array_map( array( __CLASS__, 'round' ), $taxes );
return $taxes;
}
/**
* Searches for all matching country/state/postcode tax rates.
*
* @param array $args Args that determine the rate to find.
* @return array
*/
public static function find_rates( $args = array() ) {
$args = wp_parse_args(
$args,
array(
'country' => '',
'state' => '',
'city' => '',
'postcode' => '',
'tax_class' => '',
)
);
$country = $args['country'];
$state = $args['state'];
$city = $args['city'];
$postcode = kkart_normalize_postcode( kkart_clean( $args['postcode'] ) );
$tax_class = $args['tax_class'];
if ( ! $country ) {
return array();
}
$cache_key = KKART_Cache_Helper::get_cache_prefix( 'taxes' ) . 'kkart_tax_rates_' . md5( sprintf( '%s+%s+%s+%s+%s', $country, $state, $city, $postcode, $tax_class ) );
$matched_tax_rates = wp_cache_get( $cache_key, 'taxes' );
if ( false === $matched_tax_rates ) {
$matched_tax_rates = self::get_matched_tax_rates( $country, $state, $postcode, $city, $tax_class );
wp_cache_set( $cache_key, $matched_tax_rates, 'taxes' );
}
return apply_filters( 'kkart_find_rates', $matched_tax_rates, $args );
}
/**
* Searches for all matching country/state/postcode tax rates.
*
* @param array $args Args that determine the rate to find.
* @return array
*/
public static function find_shipping_rates( $args = array() ) {
$rates = self::find_rates( $args );
$shipping_rates = array();
if ( is_array( $rates ) ) {
foreach ( $rates as $key => $rate ) {
if ( 'yes' === $rate['shipping'] ) {
$shipping_rates[ $key ] = $rate;
}
}
}
return $shipping_rates;
}
/**
* Does the sort comparison. Compares (in this order):
* - Priority
* - Country
* - State
* - Number of postcodes
* - Number of cities
* - ID
*
* @param object $rate1 First rate to compare.
* @param object $rate2 Second rate to compare.
* @return int
*/
private static function sort_rates_callback( $rate1, $rate2 ) {
if ( $rate1->tax_rate_priority !== $rate2->tax_rate_priority ) {
return $rate1->tax_rate_priority < $rate2->tax_rate_priority ? -1 : 1; // ASC.
}
if ( $rate1->tax_rate_country !== $rate2->tax_rate_country ) {
if ( '' === $rate1->tax_rate_country ) {
return 1;
}
if ( '' === $rate2->tax_rate_country ) {
return -1;
}
return strcmp( $rate1->tax_rate_country, $rate2->tax_rate_country ) > 0 ? 1 : -1;
}
if ( $rate1->tax_rate_state !== $rate2->tax_rate_state ) {
if ( '' === $rate1->tax_rate_state ) {
return 1;
}
if ( '' === $rate2->tax_rate_state ) {
return -1;
}
return strcmp( $rate1->tax_rate_state, $rate2->tax_rate_state ) > 0 ? 1 : -1;
}
if ( isset( $rate1->postcode_count, $rate2->postcode_count ) && $rate1->postcode_count !== $rate2->postcode_count ) {
return $rate1->postcode_count < $rate2->postcode_count ? 1 : -1;
}
if ( isset( $rate1->city_count, $rate2->city_count ) && $rate1->city_count !== $rate2->city_count ) {
return $rate1->city_count < $rate2->city_count ? 1 : -1;
}
return $rate1->tax_rate_id < $rate2->tax_rate_id ? -1 : 1;
}
/**
* Logical sort order for tax rates based on the following in order of priority.
*
* @param array $rates Rates to be sorted.
* @return array
*/
private static function sort_rates( $rates ) {
uasort( $rates, __CLASS__ . '::sort_rates_callback' );
$i = 0;
foreach ( $rates as $key => $rate ) {
$rates[ $key ]->tax_rate_order = $i++;
}
return $rates;
}
/**
* Loop through a set of tax rates and get the matching rates (1 per priority).
*
* @param string $country Country code to match against.
* @param string $state State code to match against.
* @param string $postcode Postcode to match against.
* @param string $city City to match against.
* @param string $tax_class Tax class to match against.
* @return array
*/
private static function get_matched_tax_rates( $country, $state, $postcode, $city, $tax_class ) {
global $wpdb;
// Query criteria - these will be ANDed.
$criteria = array();
$criteria[] = $wpdb->prepare( "tax_rate_country IN ( %s, '' )", strtoupper( $country ) );
$criteria[] = $wpdb->prepare( "tax_rate_state IN ( %s, '' )", strtoupper( $state ) );
$criteria[] = $wpdb->prepare( 'tax_rate_class = %s', sanitize_title( $tax_class ) );
// Pre-query postcode ranges for PHP based matching.
$postcode_search = kkart_get_wildcard_postcodes( $postcode, $country );
$postcode_ranges = $wpdb->get_results( "SELECT tax_rate_id, location_code FROM {$wpdb->prefix}kkart_tax_rate_locations WHERE location_type = 'postcode' AND location_code LIKE '%...%';" );
if ( $postcode_ranges ) {
$matches = kkart_postcode_location_matcher( $postcode, $postcode_ranges, 'tax_rate_id', 'location_code', $country );
if ( ! empty( $matches ) ) {
foreach ( $matches as $matched_postcodes ) {
$postcode_search = array_merge( $postcode_search, $matched_postcodes );
}
}
}
$postcode_search = array_unique( $postcode_search );
/**
* Location matching criteria - ORed
* Needs to match:
* - rates with no postcodes and cities
* - rates with a matching postcode and city
* - rates with matching postcode, no city
* - rates with matching city, no postcode
*/
$locations_criteria = array();
$locations_criteria[] = 'locations.location_type IS NULL';
$locations_criteria[] = "
locations.location_type = 'postcode' AND locations.location_code IN ('" . implode( "','", array_map( 'esc_sql', $postcode_search ) ) . "')
AND (
( locations2.location_type = 'city' AND locations2.location_code = '" . esc_sql( strtoupper( $city ) ) . "' )
OR NOT EXISTS (
SELECT sub.tax_rate_id FROM {$wpdb->prefix}kkart_tax_rate_locations as sub
WHERE sub.location_type = 'city'
AND sub.tax_rate_id = tax_rates.tax_rate_id
)
)
";
$locations_criteria[] = "
locations.location_type = 'city' AND locations.location_code = '" . esc_sql( strtoupper( $city ) ) . "'
AND NOT EXISTS (
SELECT sub.tax_rate_id FROM {$wpdb->prefix}kkart_tax_rate_locations as sub
WHERE sub.location_type = 'postcode'
AND sub.tax_rate_id = tax_rates.tax_rate_id
)
";
$criteria[] = '( ( ' . implode( ' ) OR ( ', $locations_criteria ) . ' ) )';
$criteria_string = implode( ' AND ', $criteria );
// phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
$found_rates = $wpdb->get_results(
"
SELECT tax_rates.*, COUNT( locations.location_id ) as postcode_count, COUNT( locations2.location_id ) as city_count
FROM {$wpdb->prefix}kkart_tax_rates as tax_rates
LEFT OUTER JOIN {$wpdb->prefix}kkart_tax_rate_locations as locations ON tax_rates.tax_rate_id = locations.tax_rate_id
LEFT OUTER JOIN {$wpdb->prefix}kkart_tax_rate_locations as locations2 ON tax_rates.tax_rate_id = locations2.tax_rate_id
WHERE 1=1 AND {$criteria_string}
GROUP BY tax_rates.tax_rate_id
ORDER BY tax_rates.tax_rate_priority
"
);
// phpcs:enable
$found_rates = self::sort_rates( $found_rates );
$matched_tax_rates = array();
$found_priority = array();
foreach ( $found_rates as $found_rate ) {
if ( in_array( $found_rate->tax_rate_priority, $found_priority, true ) ) {
continue;
}
$matched_tax_rates[ $found_rate->tax_rate_id ] = array(
'rate' => (float) $found_rate->tax_rate,
'label' => $found_rate->tax_rate_name,
'shipping' => $found_rate->tax_rate_shipping ? 'yes' : 'no',
'compound' => $found_rate->tax_rate_compound ? 'yes' : 'no',
);
$found_priority[] = $found_rate->tax_rate_priority;
}
return apply_filters( 'kkart_matched_tax_rates', $matched_tax_rates, $country, $state, $postcode, $city, $tax_class );
}
/**
* Get the customer tax location based on their status and the current page.
*
* Used by get_rates(), get_shipping_rates().
*
* @param string $tax_class string Optional, passed to the filter for advanced tax setups.
* @param object $customer Override the customer object to get their location.
* @return array
*/
public static function get_tax_location( $tax_class = '', $customer = null ) {
$location = array();
if ( is_null( $customer ) && KKART()->customer ) {
$customer = KKART()->customer;
}
if ( ! empty( $customer ) ) {
$location = $customer->get_taxable_address();
} elseif ( kkart_prices_include_tax() || 'base' === get_option( 'kkart_default_customer_address' ) || 'base' === get_option( 'kkart_tax_based_on' ) ) {
$location = array(
KKART()->countries->get_base_country(),
KKART()->countries->get_base_state(),
KKART()->countries->get_base_postcode(),
KKART()->countries->get_base_city(),
);
}
return apply_filters( 'kkart_get_tax_location', $location, $tax_class, $customer );
}
/**
* Get's an array of matching rates for a tax class.
*
* @param string $tax_class Tax class to get rates for.
* @param object $customer Override the customer object to get their location.
* @return array
*/
public static function get_rates( $tax_class = '', $customer = null ) {
$tax_class = sanitize_title( $tax_class );
$location = self::get_tax_location( $tax_class, $customer );
$matched_tax_rates = array();
if ( count( $location ) === 4 ) {
list( $country, $state, $postcode, $city ) = $location;
$matched_tax_rates = self::find_rates(
array(
'country' => $country,
'state' => $state,
'postcode' => $postcode,
'city' => $city,
'tax_class' => $tax_class,
)
);
}
return apply_filters( 'kkart_matched_rates', $matched_tax_rates, $tax_class, $customer );
}
/**
* Get's an array of matching rates for the shop's base country.
*
* @param string $tax_class Tax Class.
* @return array
*/
public static function get_base_tax_rates( $tax_class = '' ) {
return apply_filters(
'kkart_base_tax_rates',
self::find_rates(
array(
'country' => KKART()->countries->get_base_country(),
'state' => KKART()->countries->get_base_state(),
'postcode' => KKART()->countries->get_base_postcode(),
'city' => KKART()->countries->get_base_city(),
'tax_class' => $tax_class,
)
),
$tax_class
);
}
/**
* Alias for get_base_tax_rates().
*
* @deprecated 2.3
* @param string $tax_class Tax Class.
* @return array
*/
public static function get_shop_base_rate( $tax_class = '' ) {
return self::get_base_tax_rates( $tax_class );
}
/**
* Gets an array of matching shipping tax rates for a given class.
*
* @param string $tax_class Tax class to get rates for.
* @param object $customer Override the customer object to get their location.
* @return mixed
*/
public static function get_shipping_tax_rates( $tax_class = null, $customer = null ) {
// See if we have an explicitly set shipping tax class.
$shipping_tax_class = get_option( 'kkart_shipping_tax_class' );
if ( 'inherit' !== $shipping_tax_class ) {
$tax_class = $shipping_tax_class;
}
$location = self::get_tax_location( $tax_class, $customer );
$matched_tax_rates = array();
if ( 4 === count( $location ) ) {
list( $country, $state, $postcode, $city ) = $location;
if ( ! is_null( $tax_class ) ) {
// This will be per item shipping.
$matched_tax_rates = self::find_shipping_rates(
array(
'country' => $country,
'state' => $state,
'postcode' => $postcode,
'city' => $city,
'tax_class' => $tax_class,
)
);
} elseif ( KKART()->cart->get_cart() ) {
// This will be per order shipping - loop through the order and find the highest tax class rate.
$cart_tax_classes = KKART()->cart->get_cart_item_tax_classes_for_shipping();
// No tax classes = no taxable items.
if ( empty( $cart_tax_classes ) ) {
return array();
}
// If multiple classes are found, use the first one found unless a standard rate item is found. This will be the first listed in the 'additional tax class' section.
if ( count( $cart_tax_classes ) > 1 && ! in_array( '', $cart_tax_classes, true ) ) {
$tax_classes = self::get_tax_class_slugs();
foreach ( $tax_classes as $tax_class ) {
if ( in_array( $tax_class, $cart_tax_classes, true ) ) {
$matched_tax_rates = self::find_shipping_rates(
array(
'country' => $country,
'state' => $state,
'postcode' => $postcode,
'city' => $city,
'tax_class' => $tax_class,
)
);
break;
}
}
} elseif ( 1 === count( $cart_tax_classes ) ) {
// If a single tax class is found, use it.
$matched_tax_rates = self::find_shipping_rates(
array(
'country' => $country,
'state' => $state,
'postcode' => $postcode,
'city' => $city,
'tax_class' => $cart_tax_classes[0],
)
);
}
}
// Get standard rate if no taxes were found.
if ( ! count( $matched_tax_rates ) ) {
$matched_tax_rates = self::find_shipping_rates(
array(
'country' => $country,
'state' => $state,
'postcode' => $postcode,
'city' => $city,
)
);
}
}
return $matched_tax_rates;
}
/**
* Return true/false depending on if a rate is a compound rate.
*
* @param mixed $key_or_rate Tax rate ID, or the db row itself in object format.
* @return bool
*/
public static function is_compound( $key_or_rate ) {
global $wpdb;
if ( is_object( $key_or_rate ) ) {
$key = $key_or_rate->tax_rate_id;
$compound = $key_or_rate->tax_rate_compound;
} else {
$key = $key_or_rate;
$compound = (bool) $wpdb->get_var( $wpdb->prepare( "SELECT tax_rate_compound FROM {$wpdb->prefix}kkart_tax_rates WHERE tax_rate_id = %s", $key ) );
}
return (bool) apply_filters( 'kkart_rate_compound', $compound, $key );
}
/**
* Return a given rates label.
*
* @param mixed $key_or_rate Tax rate ID, or the db row itself in object format.
* @return string
*/
public static function get_rate_label( $key_or_rate ) {
global $wpdb;
if ( is_object( $key_or_rate ) ) {
$key = $key_or_rate->tax_rate_id;
$rate_name = $key_or_rate->tax_rate_name;
} else {
$key = $key_or_rate;
$rate_name = $wpdb->get_var( $wpdb->prepare( "SELECT tax_rate_name FROM {$wpdb->prefix}kkart_tax_rates WHERE tax_rate_id = %s", $key ) );
}
if ( ! $rate_name ) {
$rate_name = KKART()->countries->tax_or_vat();
}
return apply_filters( 'kkart_rate_label', $rate_name, $key );
}
/**
* Return a given rates percent.
*
* @param mixed $key_or_rate Tax rate ID, or the db row itself in object format.
* @return string
*/
public static function get_rate_percent( $key_or_rate ) {
$rate_percent_value = self::get_rate_percent_value( $key_or_rate );
$tax_rate_id = is_object( $key_or_rate ) ? $key_or_rate->tax_rate_id : $key_or_rate;
return apply_filters( 'kkart_rate_percent', $rate_percent_value . '%', $tax_rate_id );
}
/**
* Return a given rates percent.
*
* @param mixed $key_or_rate Tax rate ID, or the db row itself in object format.
* @return float
*/
public static function get_rate_percent_value( $key_or_rate ) {
global $wpdb;
if ( is_object( $key_or_rate ) ) {
$tax_rate = $key_or_rate->tax_rate;
} else {
$key = $key_or_rate;
$tax_rate = $wpdb->get_var( $wpdb->prepare( "SELECT tax_rate FROM {$wpdb->prefix}kkart_tax_rates WHERE tax_rate_id = %s", $key ) );
}
return floatval( $tax_rate );
}
/**
* Get a rates code. Code is made up of COUNTRY-STATE-NAME-Priority. E.g GB-VAT-1, US-AL-TAX-1.
*
* @param mixed $key_or_rate Tax rate ID, or the db row itself in object format.
* @return string
*/
public static function get_rate_code( $key_or_rate ) {
global $wpdb;
if ( is_object( $key_or_rate ) ) {
$key = $key_or_rate->tax_rate_id;
$rate = $key_or_rate;
} else {
$key = $key_or_rate;
$rate = $wpdb->get_row( $wpdb->prepare( "SELECT tax_rate_country, tax_rate_state, tax_rate_name, tax_rate_priority FROM {$wpdb->prefix}kkart_tax_rates WHERE tax_rate_id = %s", $key ) );
}
$code_string = '';
if ( null !== $rate ) {
$code = array();
$code[] = $rate->tax_rate_country;
$code[] = $rate->tax_rate_state;
$code[] = $rate->tax_rate_name ? $rate->tax_rate_name : 'TAX';
$code[] = absint( $rate->tax_rate_priority );
$code_string = strtoupper( implode( '-', array_filter( $code ) ) );
}
return apply_filters( 'kkart_rate_code', $code_string, $key );
}
/**
* Sums a set of taxes to form a single total. Values are pre-rounded to precision from 3.6.0.
*
* @param array $taxes Array of taxes.
* @return float
*/
public static function get_tax_total( $taxes ) {
return array_sum( $taxes );
}
/**
* Gets all tax rate classes from the database.
*
* @since 3.7.0
* @return array Array of tax class objects consisting of tax_rate_class_id, name, and slug.
*/
protected static function get_tax_rate_classes() {
global $wpdb;
$cache_key = 'tax-rate-classes';
$tax_rate_classes = wp_cache_get( $cache_key, 'taxes' );
if ( ! is_array( $tax_rate_classes ) ) {
$tax_rate_classes = $wpdb->get_results(
"
SELECT * FROM {$wpdb->kkart_tax_rate_classes} ORDER BY name;
"
);
wp_cache_set( $cache_key, $tax_rate_classes, 'taxes' );
}
return $tax_rate_classes;
}
/**
* Get store tax class names.
*
* @return array Array of class names ("Reduced rate", "Zero rate", etc).
*/
public static function get_tax_classes() {
return wp_list_pluck( self::get_tax_rate_classes(), 'name' );
}
/**
* Get store tax classes as slugs.
*
* @since 3.0.0
* @return array Array of class slugs ("reduced-rate", "zero-rate", etc).
*/
public static function get_tax_class_slugs() {
return wp_list_pluck( self::get_tax_rate_classes(), 'slug' );
}
/**
* Create a new tax class.
*
* @since 3.7.0
* @param string $name Name of the tax class to add.
* @param string $slug (optional) Slug of the tax class to add. Defaults to sanitized name.
* @return WP_Error|array Returns name and slug (array) if the tax class is created, or WP_Error if something went wrong.
*/
public static function create_tax_class( $name, $slug = '' ) {
global $wpdb;
if ( empty( $name ) ) {
return new WP_Error( 'tax_class_invalid_name', __( 'Tax class requires a valid name', 'kkart' ) );
}
$existing = self::get_tax_classes();
$existing_slugs = self::get_tax_class_slugs();
if ( in_array( $name, $existing, true ) ) {
return new WP_Error( 'tax_class_exists', __( 'Tax class already exists', 'kkart' ) );
}
if ( ! $slug ) {
$slug = sanitize_title( $name );
}
if ( in_array( $slug, $existing_slugs, true ) ) {
return new WP_Error( 'tax_class_slug_exists', __( 'Tax class slug already exists', 'kkart' ) );
}
$insert = $wpdb->insert(
$wpdb->kkart_tax_rate_classes,
array(
'name' => $name,
'slug' => $slug,
)
);
if ( is_wp_error( $insert ) ) {
return new WP_Error( 'tax_class_insert_error', $insert->get_error_message() );
}
wp_cache_delete( 'tax-rate-classes', 'taxes' );
return array(
'name' => $name,
'slug' => $slug,
);
}
/**
* Get an existing tax class.
*
* @since 3.7.0
* @param string $field Field to get by. Valid values are id, name, or slug.
* @param string|int $item Item to get.
* @return array|bool Returns the tax class as an array. False if not found.
*/
public static function get_tax_class_by( $field, $item ) {
if ( ! in_array( $field, array( 'id', 'name', 'slug' ), true ) ) {
return new WP_Error( 'invalid_field', __( 'Invalid field', 'kkart' ) );
}
if ( 'id' === $field ) {
$field = 'tax_rate_class_id';
}
$matches = wp_list_filter(
self::get_tax_rate_classes(),
array(
$field => $item,
)
);
if ( ! $matches ) {
return false;
}
$tax_class = current( $matches );
return array(
'name' => $tax_class->name,
'slug' => $tax_class->slug,
);
}
/**
* Delete an existing tax class.
*
* @since 3.7.0
* @param string $field Field to delete by. Valid values are id, name, or slug.
* @param string|int $item Item to delete.
* @return WP_Error|bool Returns true if deleted successfully, false if nothing was deleted, or WP_Error if there is an invalid request.
*/
public static function delete_tax_class_by( $field, $item ) {
global $wpdb;
if ( ! in_array( $field, array( 'id', 'name', 'slug' ), true ) ) {
return new WP_Error( 'invalid_field', __( 'Invalid field', 'kkart' ) );
}
$tax_class = self::get_tax_class_by( $field, $item );
if ( ! $tax_class ) {
return new WP_Error( 'invalid_tax_class', __( 'Invalid tax class', 'kkart' ) );
}
if ( 'id' === $field ) {
$field = 'tax_rate_class_id';
}
$delete = $wpdb->delete(
$wpdb->kkart_tax_rate_classes,
array(
$field => $item,
)
);
if ( $delete ) {
// Delete associated tax rates.
$wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->prefix}kkart_tax_rates WHERE tax_rate_class = %s;", $tax_class['slug'] ) );
$wpdb->query( "DELETE locations FROM {$wpdb->prefix}kkart_tax_rate_locations locations LEFT JOIN {$wpdb->prefix}kkart_tax_rates rates ON rates.tax_rate_id = locations.tax_rate_id WHERE rates.tax_rate_id IS NULL;" );
}
wp_cache_delete( 'tax-rate-classes', 'taxes' );
KKART_Cache_Helper::invalidate_cache_group( 'taxes' );
return (bool) $delete;
}
/**
* Format the city.
*
* @param string $city Value to format.
* @return string
*/
private static function format_tax_rate_city( $city ) {
return strtoupper( trim( $city ) );
}
/**
* Format the state.
*
* @param string $state Value to format.
* @return string
*/
private static function format_tax_rate_state( $state ) {
$state = strtoupper( $state );
return ( '*' === $state ) ? '' : $state;
}
/**
* Format the country.
*
* @param string $country Value to format.
* @return string
*/
private static function format_tax_rate_country( $country ) {
$country = strtoupper( $country );
return ( '*' === $country ) ? '' : $country;
}
/**
* Format the tax rate name.
*
* @param string $name Value to format.
* @return string
*/
private static function format_tax_rate_name( $name ) {
return $name ? $name : __( 'Tax', 'kkart' );
}
/**
* Format the rate.
*
* @param float $rate Value to format.
* @return string
*/
private static function format_tax_rate( $rate ) {
return number_format( (float) $rate, 4, '.', '' );
}
/**
* Format the priority.
*
* @param string $priority Value to format.
* @return int
*/
private static function format_tax_rate_priority( $priority ) {
return absint( $priority );
}
/**
* Format the class.
*
* @param string $class Value to format.
* @return string
*/
public static function format_tax_rate_class( $class ) {
$class = sanitize_title( $class );
$classes = self::get_tax_class_slugs();
if ( ! in_array( $class, $classes, true ) ) {
$class = '';
}
return ( 'standard' === $class ) ? '' : $class;
}
/**
* Prepare and format tax rate for DB insertion.
*
* @param array $tax_rate Tax rate to format.
* @return array
*/
private static function prepare_tax_rate( $tax_rate ) {
foreach ( $tax_rate as $key => $value ) {
if ( method_exists( __CLASS__, 'format_' . $key ) ) {
if ( 'tax_rate_state' === $key ) {
$tax_rate[ $key ] = call_user_func( array( __CLASS__, 'format_' . $key ), sanitize_key( $value ) );
} else {
$tax_rate[ $key ] = call_user_func( array( __CLASS__, 'format_' . $key ), $value );
}
}
}
return $tax_rate;
}
/**
* Insert a new tax rate.
*
* Internal use only.
*
* @since 2.3.0
*
* @param array $tax_rate Tax rate to insert.
* @return int tax rate id
*/
public static function _insert_tax_rate( $tax_rate ) {
global $wpdb;
$wpdb->insert( $wpdb->prefix . 'kkart_tax_rates', self::prepare_tax_rate( $tax_rate ) );
$tax_rate_id = $wpdb->insert_id;
KKART_Cache_Helper::invalidate_cache_group( 'taxes' );
do_action( 'kkart_tax_rate_added', $tax_rate_id, $tax_rate );
return $tax_rate_id;
}
/**
* Get tax rate.
*
* Internal use only.
*
* @since 2.5.0
*
* @param int $tax_rate_id Tax rate ID.
* @param string $output_type Type of output.
* @return array|object
*/
public static function _get_tax_rate( $tax_rate_id, $output_type = ARRAY_A ) {
global $wpdb;
return $wpdb->get_row(
$wpdb->prepare(
"
SELECT *
FROM {$wpdb->prefix}kkart_tax_rates
WHERE tax_rate_id = %d
",
$tax_rate_id
),
$output_type
);
}
/**
* Update a tax rate.
*
* Internal use only.
*
* @since 2.3.0
*
* @param int $tax_rate_id Tax rate to update.
* @param array $tax_rate Tax rate values.
*/
public static function _update_tax_rate( $tax_rate_id, $tax_rate ) {
global $wpdb;
$tax_rate_id = absint( $tax_rate_id );
$wpdb->update(
$wpdb->prefix . 'kkart_tax_rates',
self::prepare_tax_rate( $tax_rate ),
array(
'tax_rate_id' => $tax_rate_id,
)
);
KKART_Cache_Helper::invalidate_cache_group( 'taxes' );
do_action( 'kkart_tax_rate_updated', $tax_rate_id, $tax_rate );
}
/**
* Delete a tax rate from the database.
*
* Internal use only.
*
* @since 2.3.0
* @param int $tax_rate_id Tax rate to delete.
*/
public static function _delete_tax_rate( $tax_rate_id ) {
global $wpdb;
$wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->prefix}kkart_tax_rate_locations WHERE tax_rate_id = %d;", $tax_rate_id ) );
$wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->prefix}kkart_tax_rates WHERE tax_rate_id = %d;", $tax_rate_id ) );
KKART_Cache_Helper::invalidate_cache_group( 'taxes' );
do_action( 'kkart_tax_rate_deleted', $tax_rate_id );
}
/**
* Update postcodes for a tax rate in the DB.
*
* Internal use only.
*
* @since 2.3.0
*
* @param int $tax_rate_id Tax rate to update.
* @param string $postcodes String of postcodes separated by ; characters.
*/
public static function _update_tax_rate_postcodes( $tax_rate_id, $postcodes ) {
if ( ! is_array( $postcodes ) ) {
$postcodes = explode( ';', $postcodes );
}
// No normalization - postcodes are matched against both normal and formatted versions to support wildcards.
foreach ( $postcodes as $key => $postcode ) {
$postcodes[ $key ] = strtoupper( trim( str_replace( chr( 226 ) . chr( 128 ) . chr( 166 ), '...', $postcode ) ) );
}
self::update_tax_rate_locations( $tax_rate_id, array_diff( array_filter( $postcodes ), array( '*' ) ), 'postcode' );
}
/**
* Update cities for a tax rate in the DB.
*
* Internal use only.
*
* @since 2.3.0
*
* @param int $tax_rate_id Tax rate to update.
* @param string $cities Cities to set.
*/
public static function _update_tax_rate_cities( $tax_rate_id, $cities ) {
if ( ! is_array( $cities ) ) {
$cities = explode( ';', $cities );
}
$cities = array_filter( array_diff( array_map( array( __CLASS__, 'format_tax_rate_city' ), $cities ), array( '*' ) ) );
self::update_tax_rate_locations( $tax_rate_id, $cities, 'city' );
}
/**
* Updates locations (postcode and city).
*
* Internal use only.
*
* @since 2.3.0
*
* @param int $tax_rate_id Tax rate ID to update.
* @param array $values Values to set.
* @param string $type Location type.
*/
private static function update_tax_rate_locations( $tax_rate_id, $values, $type ) {
global $wpdb;
$tax_rate_id = absint( $tax_rate_id );
$wpdb->query(
$wpdb->prepare(
"DELETE FROM {$wpdb->prefix}kkart_tax_rate_locations WHERE tax_rate_id = %d AND location_type = %s;",
$tax_rate_id,
$type
)
);
if ( count( $values ) > 0 ) {
$sql = "( '" . implode( "', $tax_rate_id, '" . esc_sql( $type ) . "' ),( '", array_map( 'esc_sql', $values ) ) . "', $tax_rate_id, '" . esc_sql( $type ) . "' )";
$wpdb->query( "INSERT INTO {$wpdb->prefix}kkart_tax_rate_locations ( location_code, tax_rate_id, location_type ) VALUES $sql;" ); // @codingStandardsIgnoreLine.
}
KKART_Cache_Helper::invalidate_cache_group( 'taxes' );
}
/**
* Used by admin settings page.
*
* @param string $tax_class Tax class slug.
*
* @return array|null|object
*/
public static function get_rates_for_tax_class( $tax_class ) {
global $wpdb;
// Get all the rates and locations. Snagging all at once should significantly cut down on the number of queries.
$rates = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM `{$wpdb->prefix}kkart_tax_rates` WHERE `tax_rate_class` = %s;", sanitize_title( $tax_class ) ) );
$locations = $wpdb->get_results( "SELECT * FROM `{$wpdb->prefix}kkart_tax_rate_locations`" );
if ( ! empty( $rates ) ) {
// Set the rates keys equal to their ids.
$rates = array_combine( wp_list_pluck( $rates, 'tax_rate_id' ), $rates );
}
// Drop the locations into the rates array.
foreach ( $locations as $location ) {
// Don't set them for unexistent rates.
if ( ! isset( $rates[ $location->tax_rate_id ] ) ) {
continue;
}
// If the rate exists, initialize the array before appending to it.
if ( ! isset( $rates[ $location->tax_rate_id ]->{$location->location_type} ) ) {
$rates[ $location->tax_rate_id ]->{$location->location_type} = array();
}
$rates[ $location->tax_rate_id ]->{$location->location_type}[] = $location->location_code;
}
foreach ( $rates as $rate_id => $rate ) {
$rates[ $rate_id ]->postcode_count = isset( $rates[ $rate_id ]->postcode ) ? count( $rates[ $rate_id ]->postcode ) : 0;
$rates[ $rate_id ]->city_count = isset( $rates[ $rate_id ]->city ) ? count( $rates[ $rate_id ]->city ) : 0;
}
$rates = self::sort_rates( $rates );
return $rates;
}
}
KKART_Tax::init();
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