53 lines
1.6 KiB
PHP
53 lines
1.6 KiB
PHP
<?php
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namespace App\Support;
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use Illuminate\Http\Request;
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/**
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* 与 NegotiateLotteryLocale 相同的协商规则；供异常 render 等非中间件链路使用。
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*/
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final class LotteryLocale
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{
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public static function resolve(Request $request): string
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{
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/** @var list<string> $supported */
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$supported = array_values(array_unique(config('lottery.locales.supported', ['en', 'zh', 'ne'])));
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$fallback = (string) config('lottery.locales.fallback', 'en');
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$header = strtolower(trim((string) $request->header('X-Locale', '')));
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if ($header !== '' && in_array($header, $supported, true)) {
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return $header;
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}
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return self::fromAcceptLanguage((string) $request->header('Accept-Language', ''), $supported, $fallback);
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}
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/** @param list<string> $supported */
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private static function fromAcceptLanguage(string $header, array $supported, string $fallback): string
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{
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if ($header === '') {
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return $fallback;
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}
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foreach (explode(',', $header) as $part) {
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$code = strtolower(trim(explode(';', trim($part), 2)[0] ?? ''));
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if ($code === '') {
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continue;
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}
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$primary = explode('-', $code, 2)[0] ?? $code;
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if ($primary === 'zh' && in_array('zh', $supported, true)) {
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return 'zh';
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}
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if ($primary === 'ne' && in_array('ne', $supported, true)) {
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return 'ne';
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}
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if ($primary === 'en' && in_array('en', $supported, true)) {
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return 'en';
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}
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}
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return $fallback;
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}
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}
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