<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\App;
use Symfony\Component\HttpFoundation\Response;

/**
 * Setzt die Sprache der Oberfläche: die des angemeldeten Benutzers, sonst die Standardsprache.
 */
class SetLocale
{
    public function handle(Request $request, Closure $next): Response
    {
        /** @var array<string, string> $available */
        $available = config('app.available_locales');
        $locale = $request->user()?->locale;

        if (! is_string($locale) || ! array_key_exists($locale, $available)) {
            $locale = config('app.locale');
        }

        App::setLocale($locale);

        return $next($request);
    }
}