LocaleController.php

<?php

namespace App\Packages\FrontPage\Home\Presentation\Controllers;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\Packages\FrontPage\Home\UseCase\SetLocaleUseCase;

class LocaleController extends Controller
{
    private SetLocaleUseCase $setLocaleUseCase;

    public function __construct(SetLocaleUseCase $setLocaleUseCase)
    {
        $this->setLocaleUseCase = $setLocaleUseCase;
    }

    /**
     * 言語変更
     *
     * @param string $locale
     * @return void
     */
    public function setLocaleSession(string $locale)
    {
        $this->setLocaleUseCase->setLocale($locale);
        
        $urlToRedirect = url()->previous(route('home'));
        return redirect($urlToRedirect);
    }
}