public function sell($productId, $amount)
{
$productModel = new ProductModel();
$viewModel = new InformationViewModel();
if (!$productModel->exists($productId)) {
$viewModel->error = "Product {$productId} does not exist";
return new View($viewModel);
}
if ($amount < 0) {
$viewModel->error = "You can sell at least one item";
return new View($viewModel);
}
try {
$productModel->sell($_SESSION['id'], $productId, $amount);
$viewModel->success = "Product {$productId} sold successfully";
} catch (\Exception $e) {
$viewModel->error = $e->getMessage();
}
return new View($viewModel);
}
