ladill-qr-plus/app/Http/Middleware/SetActingAccount.php

<?php

namespace App\Http\Middleware;

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

class SetActingAccount
{
    public function handle(Request $request, Closure $next): Response
    {
        if ($user = $request->user()) {
            $accountId = (int) $request->session()->get('ladill_account', $user->id);

            if (! $user->canAccessAccount($accountId)) {
                $accountId = $user->id;
                $request->session()->put('ladill_account', $accountId);
            }

            $account = $accountId === $user->id ? $user : (User::find($accountId) ?? $user);

            $request->attributes->set('actingAccount', $account);
            View::share('actingAccount', $account);
            View::share('accessibleAccounts', $user->accessibleAccounts());
        }

        return $next($request);
    }
}