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<?php
include('dbcon.php');
$id = $_POST['id'];
$action = $_POST['action'];
if ($action == "plus") {
$conn->query("UPDATE cart_items SET quantity = quantity + 1 WHERE id = '$id'");
} else {
$conn->query("UPDATE cart_items SET quantity = IF(quantity > 1, quantity - 1, 1) WHERE id = '$id'");
}
$result = $conn->query("
SELECT ci.quantity, p.price
FROM cart_items ci
JOIN areawecover p ON ci.product_id = p.id
WHERE ci.id = '$id'
");
$row = $result->fetch_assoc();
$total = $row['quantity'] * $row['price'];
echo json_encode([
"quantity" => $row['quantity'],
"total" => number_format($total,2)
]);