root
112 lines
3.0 KiB
PHP
112 lines
3.0 KiB
PHP
<?php
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class GeoIpCountryResolver
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{
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/** @var GeoIp2\Database\Reader|null */
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private static $reader = null;
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/** @var array<string, string|null> */
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private static $requestCache = [];
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/** @var string|null */
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private static $lastSource = null;
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/**
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* @param string $ip
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* @return array{code:?string, source:string}
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*/
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public static function resolveWithMeta($ip)
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{
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$ip = ClientIpResolver::normalizeIp($ip);
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if ($ip === null) {
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self::$lastSource = 'invalid_ip';
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return ['code' => null, 'source' => 'invalid_ip'];
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}
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if (array_key_exists($ip, self::$requestCache)) {
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self::$lastSource = 'request';
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return ['code' => self::$requestCache[$ip], 'source' => 'request'];
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}
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$cached = GeoIpCountryCache::get($ip);
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if ($cached !== false) {
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self::$requestCache[$ip] = $cached;
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self::$lastSource = 'cache';
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return ['code' => $cached, 'source' => 'cache'];
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}
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$code = self::lookupMmdb($ip);
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GeoIpCountryCache::set($ip, $code);
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self::$requestCache[$ip] = $code;
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self::$lastSource = 'mmdb';
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return ['code' => $code, 'source' => 'mmdb'];
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}
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/**
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* @param string $ip
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* @return string|null ISO 3166-1 alpha-2
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*/
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public static function resolve($ip)
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{
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$result = self::resolveWithMeta($ip);
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return $result['code'];
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}
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public static function lastSource()
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{
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return self::$lastSource ?? '';
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}
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public static function isAvailable()
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{
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return self::getReader() !== null;
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}
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/**
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* @param string $ip
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* @return string|null
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*/
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private static function lookupMmdb($ip)
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{
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$reader = self::getReader();
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if ($reader === null) {
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return null;
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}
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try {
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$record = $reader->country($ip);
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$code = $record->country->isoCode ?? null;
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if ($code === null || $code === '') {
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return null;
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}
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return strtoupper((string) $code);
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} catch (GeoIp2\Exception\AddressNotFoundException $e) {
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return null;
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} catch (Throwable $e) {
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GeoIpCountryCache::logError('mmdb lookup failed: ' . $e->getMessage());
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return null;
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}
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}
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/**
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* @return GeoIp2\Database\Reader|null
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*/
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private static function getReader()
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{
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if (self::$reader !== null) {
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return self::$reader;
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}
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if (!class_exists('GeoIp2\\Database\\Reader')) {
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return null;
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}
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if (!defined('CLOAK_GEOIP_DB_PATH') || !is_file(CLOAK_GEOIP_DB_PATH)) {
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return null;
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}
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try {
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self::$reader = new GeoIp2\Database\Reader(CLOAK_GEOIP_DB_PATH);
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return self::$reader;
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} catch (Throwable $e) {
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GeoIpCountryCache::logError('Reader init failed: ' . $e->getMessage());
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return null;
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}
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}
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}
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