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<?php
/**
* Geolocation class
*
* Handles geolocation and updating the geolocation database.
*
* This product includes GeoLite data created by MaxMind, available from http://www.maxmind.com.
*
* @package Kkart\Classes
* @version 3.9.0
*/
defined( 'ABSPATH' ) || exit;
/**
* KKART_Geolocation Class.
*/
class KKART_Geolocation {
/**
* GeoLite IPv4 DB.
*
* @deprecated 3.4.0
*/
const GEOLITE_DB = 'http://geolite.maxmind.com/download/geoip/database/GeoLiteCountry/GeoIP.dat.gz';
/**
* GeoLite IPv6 DB.
*
* @deprecated 3.4.0
*/
const GEOLITE_IPV6_DB = 'http://geolite.maxmind.com/download/geoip/database/GeoIPv6.dat.gz';
/**
* GeoLite2 DB.
*
* @since 3.4.0
* @deprecated 3.9.0
*/
const GEOLITE2_DB = 'http://geolite.maxmind.com/download/geoip/database/GeoLite2-Country.tar.gz';
/**
* API endpoints for looking up user IP address.
*
* @var array
*/
private static $ip_lookup_apis = array(
'ipify' => 'http://api.ipify.org/',
'ipecho' => 'http://ipecho.net/plain',
'ident' => 'http://ident.me',
'whatismyipaddress' => 'http://bot.whatismyipaddress.com',
);
/**
* API endpoints for geolocating an IP address
*
* @var array
*/
private static $geoip_apis = array(
'ipinfo.io' => 'https://ipinfo.io/%s/json',
'ip-api.com' => 'http://ip-api.com/json/%s',
);
/**
* Check if geolocation is enabled.
*
* @since 3.4.0
* @param string $current_settings Current geolocation settings.
* @return bool
*/
private static function is_geolocation_enabled( $current_settings ) {
return in_array( $current_settings, array( 'geolocation', 'geolocation_ajax' ), true );
}
/**
* Get current user IP Address.
*
* @return string
*/
public static function get_ip_address() {
if ( isset( $_SERVER['HTTP_X_REAL_IP'] ) ) {
return sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_REAL_IP'] ) );
} elseif ( isset( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
// Proxy servers can send through this header like this: X-Forwarded-For: client1, proxy1, proxy2
// Make sure we always only send through the first IP in the list which should always be the client IP.
return (string) rest_is_ip_address( trim( current( preg_split( '/,/', sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) ) ) ) );
} elseif ( isset( $_SERVER['REMOTE_ADDR'] ) ) {
return sanitize_text_field( wp_unslash( $_SERVER['REMOTE_ADDR'] ) );
}
return '';
}
/**
* Get user IP Address using an external service.
* This can be used as a fallback for users on localhost where
* get_ip_address() will be a local IP and non-geolocatable.
*
* @return string
*/
public static function get_external_ip_address() {
$external_ip_address = '0.0.0.0';
if ( '' !== self::get_ip_address() ) {
$transient_name = 'external_ip_address_' . self::get_ip_address();
$external_ip_address = get_transient( $transient_name );
}
if ( false === $external_ip_address ) {
$external_ip_address = '0.0.0.0';
$ip_lookup_services = apply_filters( 'kkart_geolocation_ip_lookup_apis', self::$ip_lookup_apis );
$ip_lookup_services_keys = array_keys( $ip_lookup_services );
shuffle( $ip_lookup_services_keys );
foreach ( $ip_lookup_services_keys as $service_name ) {
$service_endpoint = $ip_lookup_services[ $service_name ];
$response = wp_safe_remote_get( $service_endpoint, array( 'timeout' => 2 ) );
if ( ! is_wp_error( $response ) && rest_is_ip_address( $response['body'] ) ) {
$external_ip_address = apply_filters( 'kkart_geolocation_ip_lookup_api_response', kkart_clean( $response['body'] ), $service_name );
break;
}
}
set_transient( $transient_name, $external_ip_address, WEEK_IN_SECONDS );
}
return $external_ip_address;
}
/**
* Geolocate an IP address.
*
* @param string $ip_address IP Address.
* @param bool $fallback If true, fallbacks to alternative IP detection (can be slower).
* @param bool $api_fallback If true, uses geolocation APIs if the database file doesn't exist (can be slower).
* @return array
*/
public static function geolocate_ip( $ip_address = '', $fallback = false, $api_fallback = true ) {
// Filter to allow custom geolocation of the IP address.
$country_code = apply_filters( 'kkart_geolocate_ip', false, $ip_address, $fallback, $api_fallback );
if ( false !== $country_code ) {
return array(
'country' => $country_code,
'state' => '',
'city' => '',
'postcode' => '',
);
}
if ( empty( $ip_address ) ) {
$ip_address = self::get_ip_address();
}
$country_code = self::get_country_code_from_headers();
/**
* Get geolocation filter.
*
* @since 3.9.0
* @param array $geolocation Geolocation data, including country, state, city, and postcode.
* @param string $ip_address IP Address.
*/
$geolocation = apply_filters(
'kkart_get_geolocation',
array(
'country' => $country_code,
'state' => '',
'city' => '',
'postcode' => '',
),
$ip_address
);
// If we still haven't found a country code, let's consider doing an API lookup.
if ( '' === $geolocation['country'] && $api_fallback ) {
$geolocation['country'] = self::geolocate_via_api( $ip_address );
}
// It's possible that we're in a local environment, in which case the geolocation needs to be done from the
// external address.
if ( '' === $geolocation['country'] && $fallback ) {
$external_ip_address = self::get_external_ip_address();
// Only bother with this if the external IP differs.
if ( '0.0.0.0' !== $external_ip_address && $external_ip_address !== $ip_address ) {
return self::geolocate_ip( $external_ip_address, false, $api_fallback );
}
}
return array(
'country' => $geolocation['country'],
'state' => $geolocation['state'],
'city' => $geolocation['city'],
'postcode' => $geolocation['postcode'],
);
}
/**
* Path to our local db.
*
* @deprecated 3.9.0
* @param string $deprecated Deprecated since 3.4.0.
* @return string
*/
public static function get_local_database_path( $deprecated = '2' ) {
kkart_deprecated_function( 'KKART_Geolocation::get_local_database_path', '3.9.0' );
$integration = kkart()->integrations->get_integration( 'maxmind_geolocation' );
return $integration->get_database_service()->get_database_path();
}
/**
* Update geoip database.
*
* @deprecated 3.9.0
* Extract files with PharData. Tool built into PHP since 5.3.
*/
public static function update_database() {
kkart_deprecated_function( 'KKART_Geolocation::update_database', '3.9.0' );
$integration = kkart()->integrations->get_integration( 'maxmind_geolocation' );
$integration->update_database();
}
/**
* Fetches the country code from the request headers, if one is available.
*
* @since 3.9.0
* @return string The country code pulled from the headers, or empty string if one was not found.
*/
private static function get_country_code_from_headers() {
$country_code = '';
$headers = array(
'MM_COUNTRY_CODE',
'GEOIP_COUNTRY_CODE',
'HTTP_CF_IPCOUNTRY',
'HTTP_X_COUNTRY_CODE',
);
foreach ( $headers as $header ) {
if ( empty( $_SERVER[ $header ] ) ) {
continue;
}
$country_code = strtoupper( sanitize_text_field( wp_unslash( $_SERVER[ $header ] ) ) );
break;
}
return $country_code;
}
/**
* Use APIs to Geolocate the user.
*
* Geolocation APIs can be added through the use of the kkart_geolocation_geoip_apis filter.
* Provide a name=>value pair for service-slug=>endpoint.
*
* If APIs are defined, one will be chosen at random to fulfil the request. After completing, the result
* will be cached in a transient.
*
* @param string $ip_address IP address.
* @return string
*/
private static function geolocate_via_api( $ip_address ) {
$country_code = get_transient( 'geoip_' . $ip_address );
if ( false === $country_code ) {
$geoip_services = apply_filters( 'kkart_geolocation_geoip_apis', self::$geoip_apis );
if ( empty( $geoip_services ) ) {
return '';
}
$geoip_services_keys = array_keys( $geoip_services );
shuffle( $geoip_services_keys );
foreach ( $geoip_services_keys as $service_name ) {
$service_endpoint = $geoip_services[ $service_name ];
$response = wp_safe_remote_get( sprintf( $service_endpoint, $ip_address ), array( 'timeout' => 2 ) );
if ( ! is_wp_error( $response ) && $response['body'] ) {
switch ( $service_name ) {
case 'ipinfo.io':
$data = json_decode( $response['body'] );
$country_code = isset( $data->country ) ? $data->country : '';
break;
case 'ip-api.com':
$data = json_decode( $response['body'] );
$country_code = isset( $data->countryCode ) ? $data->countryCode : ''; // @codingStandardsIgnoreLine
break;
default:
$country_code = apply_filters( 'kkart_geolocation_geoip_response_' . $service_name, '', $response['body'] );
break;
}
$country_code = sanitize_text_field( strtoupper( $country_code ) );
if ( $country_code ) {
break;
}
}
}
set_transient( 'geoip_' . $ip_address, $country_code, WEEK_IN_SECONDS );
}
return $country_code;
}
/**
* Hook in geolocation functionality.
*
* @deprecated 3.9.0
* @return null
*/
public static function init() {
kkart_deprecated_function( 'KKART_Geolocation::init', '3.9.0' );
return null;
}
/**
* Prevent geolocation via MaxMind when using legacy versions of php.
*
* @deprecated 3.9.0
* @since 3.4.0
* @param string $default_customer_address current value.
* @return string
*/
public static function disable_geolocation_on_legacy_php( $default_customer_address ) {
kkart_deprecated_function( 'KKART_Geolocation::disable_geolocation_on_legacy_php', '3.9.0' );
if ( self::is_geolocation_enabled( $default_customer_address ) ) {
$default_customer_address = 'base';
}
return $default_customer_address;
}
/**
* Maybe trigger a DB update for the first time.
*
* @deprecated 3.9.0
* @param string $new_value New value.
* @param string $old_value Old value.
* @return string
*/
public static function maybe_update_database( $new_value, $old_value ) {
kkart_deprecated_function( 'KKART_Geolocation::maybe_update_database', '3.9.0' );
if ( $new_value !== $old_value && self::is_geolocation_enabled( $new_value ) ) {
self::update_database();
}
return $new_value;
}
}