ldc-gen-game-web/app/Http/Middleware/IsAdmin.php

<?php

namespace App\Http\Middleware;

use App\Enums\Users\RoleEnum;
use Closure;
use Illuminate\Http\Request;

class IsAdmin
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request $request
     * @param  \Closure                 $next
     * @return mixed
     */
    public function handle(Request $request, Closure $next)
    {
        /** @var \App\Models\User|null */
        $user = auth('backend')->user();

        if (!$user) {
            abort(403, trans('Vous devez être authentifé'));
        }

        if ($user->role->value() > RoleEnum::admin->value()) {
            return response()->redirectToRoute('bo.home')
                ->with('warning', trans('Vous n\'avez pas les droits nécessaires pour accéder à cet élément'));
        }

        return $next($request);
    }
}