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<?php
/**
* SHOW_SITE_COUNTRY 允许列表解析与比对
*/
require_once __DIR__ . '/CountryCodeNormalizer.php';
class CountryAllowlist
{
/**
* SHOW_SITE_COUNTRY 是否已配置(非空允许列表 = 开启国家条件)
*
* @param string|null $config 默认读取 SHOW_SITE_COUNTRY
*/
public static function isEnabled($config = null)
{
if ($config === null) {
$config = defined('SHOW_SITE_COUNTRY') ? SHOW_SITE_COUNTRY : '';
}
return self::parse($config) !== [];
}
/**
* 保存前规范化用户输入:兼容中文逗号/分号、顿号、全角空格及多余空白。
*
* @param string $config
*/
public static function normalizeInput($config)
{
$config = trim((string) $config);
if ($config === '') {
return '';
}
// 全角空格、不间断空格
$config = preg_replace('/[\x{3000}\x{00A0}]/u', ' ', $config);
// 常见误输入分隔符统一为英文逗号
$config = str_replace(['', ';', '', '、'], ',', $config);
// 去掉分隔符两侧空白,合并连续逗号
$config = preg_replace('/\s*,\s*/', ',', $config);
$config = preg_replace('/,+/', ',', $config);
return trim($config, " \t\n\r,");
}
/**
* @param string $config 逗号分隔国家码,如 US,GB,CA
* @return string[]
*/
public static function parse($config)
{
$config = self::normalizeInput($config);
if ($config === '') {
return [];
}
$parts = explode(',', $config);
$out = [];
foreach ($parts as $part) {
$part = trim($part);
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if ($part === '') {
continue;
}
$normalized = CountryCodeNormalizer::toAlpha2($part);
if ($normalized !== null && $normalized !== '') {
$out[] = $normalized;
}
}
return array_values(array_unique($out));
}
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/**
* 读取并规范化 SHOW_SITE_COUNTRY(大写 ISO2,逗号分隔)
*
* @param string|null $config 默认 SHOW_SITE_COUNTRY
*/
public static function resolvedConfig($config = null)
{
if ($config === null) {
$config = defined('SHOW_SITE_COUNTRY') ? SHOW_SITE_COUNTRY : '';
}
return self::formatForConfig($config);
}
/**
* 保存配置前规范化国家列表字符串(dashboard 写入用,输出大写如 US,GB)
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*
* @param string $config
* @return string 如 US,GB
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*/
public static function formatForConfig($config)
{
$list = self::parse($config);
return implode(',', $list);
}
/**
* @param string|null $countryCode
* @param string[] $allowlist
*/
public static function isAllowed($countryCode, array $allowlist)
{
if ($allowlist === []) {
return true;
}
$normalized = CountryCodeNormalizer::toAlpha2($countryCode);
if ($normalized === null || $normalized === '') {
return false;
}
return in_array($normalized, $allowlist, true);
}
}