107 lines
3.7 KiB
PHP
107 lines
3.7 KiB
PHP
<?php
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namespace App\Http\Middleware;
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use Closure;
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/**
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* 設定網站語系
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*
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* Class SetAppLanguage
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* @package App\Http\Middleware
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*/
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class SetAppLanguage
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{
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/**
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* Cookie及Session存放Locale資訊的Key
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*
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* @var string
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*/
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private $cookieAndSessionKey = 'appLocale';
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/**
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* 設定Locale時的參數Key
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*
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* @var string
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*/
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private $localeRequestKey = 'locale';
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/**
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* Handle an incoming request.
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*
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* @param \Illuminate\Http\Request $request
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* @param \Closure $next
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* @return mixed
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*/
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public function handle($request, Closure $next)
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{
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//取得所有語言清單
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$availableLocales = (array)config('languages');
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//要被回傳的Cookie
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$setLocaleCookie = false;
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//要被設定的語言
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$setLocale = false;
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//如果有Locale參數
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if($request->get($this->localeRequestKey) !== null) {
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//取得傳入的Locale值
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$requestLocale = $request->get($this->localeRequestKey);
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//如果有在語言清單內
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if(array_key_exists($requestLocale, $availableLocales)) {
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//設定session
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$request->session()->put($this->cookieAndSessionKey, $requestLocale);
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//設定要被回傳的Cookie及目標Locale
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$setLocale = $setLocaleCookie = $requestLocale;
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}
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}
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//假如沒有目標Locale，再讀取Session、Cookie、瀏覽器的Locale
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if(!$setLocale) {
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$cookieLocale = $request->cookies->get($this->cookieAndSessionKey);
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$sessionLocale = $request->session()->get($this->cookieAndSessionKey);
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if(array_key_exists($sessionLocale, $availableLocales)) {
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//設定要被回傳的Cookie及目標Locale
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$setLocale = $sessionLocale;
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if(!$cookieLocale) {
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$setLocaleCookie = $sessionLocale;
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}
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} elseif(array_key_exists($cookieLocale, $availableLocales)) {
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//設定Session及目標Locale
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$request->session()->put($this->cookieAndSessionKey, $cookieLocale);
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$setLocale = $cookieLocale;
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} else {
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//Session及Cookie都沒有Locale值時，讀取HTTP Header的資訊
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$browserLocales = $request->server('HTTP_ACCEPT_LANGUAGE');
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$browserLocales = preg_replace('/;q=0\.\d+/', '', $browserLocales);
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$browserLocales = explode(',', $browserLocales);
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$browserLocales = array_map(function($lang){
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return strtolower($lang);
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}, $browserLocales);
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//與語言清單比對
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$validBrowserLocales = array_intersect($browserLocales, array_keys($availableLocales));
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if(!empty($validBrowserLocales)) {
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//取得第一個瀏覽器Locale
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$validBrowserLocale = head($validBrowserLocales);
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//設定Session及目標Locale
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$request->session()->put($this->cookieAndSessionKey, $validBrowserLocale);
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$setLocale = $setLocaleCookie = $validBrowserLocale;
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}
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}
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}
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if($setLocale) {
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//如果有目標Locale
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app()->setLocale($setLocale);
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} else {
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//如果沒有目標Locale，則設定成預設語言
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app()->setLocale(config('app.fallback_locale'));
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}
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//如果有Cookie，則帶入request
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if($setLocaleCookie) {
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return $next($request)->withCookie(cookie()->forever($this->cookieAndSessionKey, $setLocaleCookie));
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} else {
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return $next($request);
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}
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}
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}
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