Josep Piguillem
3897113313
Laravel 13 + Filament 5 admin panel and REST API for a non-profit developer collective, backed by the Pireon OAuth identity server. The public site is a separate, server-rendered application consuming /api/public/v1. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
94 lines
2.9 KiB
PHP
94 lines
2.9 KiB
PHP
<?php
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declare(strict_types=1);
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namespace App\Http\Middleware;
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use Carbon\Carbon;
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use Carbon\CarbonImmutable;
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use Closure;
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use Illuminate\Http\Request;
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use Symfony\Component\HttpFoundation\Response;
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/**
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* Resolves the locale for the request and applies it to the framework, to
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* Carbon, and to translatable model attributes.
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*
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* Precedence, most specific first:
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*
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* 1. ?lang=xx — an explicit, single-request override (API friendly)
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* 2. session — what the signed-in visitor picked in the switcher
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* 3. users.locale — their stored preference
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* 4. Accept-Language — what their client asked for
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* 5. locales.default
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*/
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class SetLocale
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{
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public function handle(Request $request, Closure $next): Response
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{
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$locale = $this->resolve($request);
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app()->setLocale($locale);
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// Dates rendered in the panel and serialised by the API follow suit.
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CarbonImmutable::setLocale($locale);
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Carbon::setLocale($locale);
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// Translatable attributes read this locale, and fall back to
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// locales.fallback when a record has no translation for it.
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app()->setFallbackLocale((string) config('locales.fallback'));
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$response = $next($request);
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// Lets caches and clients see which language they actually received.
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$response->headers->set('Content-Language', $locale);
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return $response;
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}
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protected function resolve(Request $request): string
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{
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$supported = array_keys(config('locales.supported'));
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$candidates = [
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$request->query(config('locales.query_parameter')),
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// The API stack is stateless, so there is no session to consult.
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// hasSession() is the safe check — session() throws when unset.
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$request->hasSession()
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? $request->session()->get(config('locales.session_key'))
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: null,
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$request->user()?->locale,
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$this->fromAcceptLanguage($request, $supported),
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config('locales.default'),
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];
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foreach ($candidates as $candidate) {
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if (is_string($candidate) && in_array($candidate, $supported, true)) {
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return $candidate;
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}
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}
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return (string) config('locales.default');
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}
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/**
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* Pick the best supported locale from the Accept-Language header, honouring
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* its quality values. "ca-ES" matches the "ca" we support.
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*
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* @param array<int, string> $supported
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*/
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protected function fromAcceptLanguage(Request $request, array $supported): ?string
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{
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foreach ($request->getLanguages() as $language) {
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$base = strtolower(str_replace('_', '-', $language));
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$base = explode('-', $base)[0];
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if (in_array($base, $supported, true)) {
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return $base;
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}
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}
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return null;
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}
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}
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