92 lines
2.2 KiB
PHP
92 lines
2.2 KiB
PHP
<?php
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namespace Modules\Common\Middlewares;
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use Closure;
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use Illuminate\Http\Request;
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use Illuminate\Support\Facades\App;
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use Illuminate\Support\Facades\Session;
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class LanguageMiddleware
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{
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/**
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* 支持的语言列表
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*/
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protected array $supportedLanguages = [
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'en' => 'en', // 英语
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'zh' => 'zh', // 简体中文
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'jp' => 'ja', // 日语
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];
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/**
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* 默认语言
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*/
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protected string $defaultLanguage = 'zh';
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/**
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* Handle an incoming request.
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*/
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public function handle(Request $request, Closure $next)
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{
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// 获取当前语言
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$locale = $this->getLocale($request);
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// 设置应用语言
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App::setLocale($locale);
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// 让请求继续处理
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return $next($request);
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}
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/**
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* 获取当前语言设置
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*/
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protected function getLocale(Request $request): string
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{
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// 优先级 1: URL 参数 (例如 ?lang=en)
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if ($request->has('lang')) {
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$lang = $request->get('lang');
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if ($this->isSupported($lang)) {
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return $lang;
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}
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}
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// 优先级 2: User-Language 头
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$browserLocale = $this->getBrowserLocale($request);
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if ($browserLocale && $this->isSupported($browserLocale)) {
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return $browserLocale;
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}
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// 优先级 3: Session 中存储的语言
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if (Session::has('locale')) {
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$lang = Session::get('locale');
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if ($this->isSupported($lang)) {
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return $lang;
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}
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}
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// 优先级 4: 配置文件中的默认语言
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return config('app.locale', $this->defaultLanguage);
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}
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/**
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* 从 User-Language 头中获取浏览器偏好语言
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*/
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protected function getBrowserLocale(Request $request): ?string
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{
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$acceptLanguage = $request->header('User-Language');
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if (!$acceptLanguage) {
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return null;
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}
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return $acceptLanguage;
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}
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/**
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* 检查语言是否被支持
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*/
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protected function isSupported(string $locale): bool
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{
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return array_key_exists($locale, $this->supportedLanguages);
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}
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}
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