<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2025 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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declare (strict_types = 1);
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namespace think\middleware;
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use Closure;
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use think\App;
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use think\Config;
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use think\Cookie;
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use think\Lang;
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use think\Request;
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use think\Response;
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/**
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* 多语言加载
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*/
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class LoadLangPack
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{
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protected $config;
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public function __construct(protected App $app, protected Lang $lang, Config $config)
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{
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$this->config = $lang->getConfig();
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}
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/**
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* 路由初始化（路由规则注册）
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* @access public
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* @param Request $request
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* @param Closure $next
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* @return Response
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*/
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public function handle(Request $request, Closure $next): Response
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{
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// 自动侦测当前语言
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$langset = $this->detect($request);
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if ($this->lang->defaultLangSet() != $langset) {
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$this->lang->switchLangSet($langset);
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}
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$this->saveToCookie($this->app->cookie, $langset);
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return $next($request);
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}
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/**
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* 自动侦测设置获取语言选择
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* @access protected
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* @param Request $request
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* @return string
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*/
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protected function detect(Request $request): string
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{
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// 自动侦测设置获取语言选择
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$langSet = '';
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if ($request->get($this->config['detect_var'])) {
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// url中设置了语言变量
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$langSet = $request->get($this->config['detect_var']);
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} elseif ($request->header($this->config['header_var'])) {
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// Header中设置了语言变量
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$langSet = $request->header($this->config['header_var']);
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} elseif ($request->cookie($this->config['cookie_var'])) {
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// Cookie中设置了语言变量
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$langSet = $request->cookie($this->config['cookie_var']);
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} elseif ($this->config['auto_detect_browser'] && $request->server('HTTP_ACCEPT_LANGUAGE')) {
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// 自动侦测浏览器语言
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$langSet = $request->server('HTTP_ACCEPT_LANGUAGE');
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}
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if (preg_match('/^([a-z\d\-]+)/i', $langSet, $matches)) {
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$langSet = strtolower($matches[1]);
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if (isset($this->config['accept_language'][$langSet])) {
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$langSet = $this->config['accept_language'][$langSet];
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}
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} else {
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$langSet = $this->lang->getLangSet();
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}
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if (empty($this->config['allow_lang_list']) || in_array($langSet, $this->config['allow_lang_list'])) {
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// 合法的语言
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$this->lang->setLangSet($langSet);
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} else {
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$langSet = $this->lang->getLangSet();
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}
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return $langSet;
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}
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/**
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* 保存当前语言到Cookie
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* @access protected
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* @param Cookie $cookie Cookie对象
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* @param string $langSet 语言
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* @return void
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*/
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protected function saveToCookie(Cookie $cookie, string $langSet): void
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{
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if ($this->config['use_cookie']) {
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$cookie->set($this->config['cookie_var'], $langSet);
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}
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}
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}
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