Guard.php

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;

/**
 * Multi-guard authentication middleware.
 *
 * Usage (bootstrap/app.php):
 *   ->withMiddleware(function (Middleware $m) {
 *       $m->alias(['guard:user' => Guard::class, ...]);
 *   })
 *
 * Accepts a guard name argument: guard:user | guard:staff | guard:control
 * Redirects unauthenticated requests to the appropriate login route.
 */
class Guard
{
    public function handle(Request $request, Closure $next, string $guard): Response
    {
        // Check auth($guard)->check(), redirect to {$guard}.login if not authenticated
        // ...
    }
}