public async Task <Order> GetOrderByRef(int orderRef, CancellationToken cancellationToken = default)
{
// Use Damm algorithum to verify order reference for mistyped value.
if (!DammAlgorithm.IsValid(orderRef))
{
throw new ArgumentOutOfRangeException("Invalid checksum value", nameof(orderRef));
}
// Strip the check value from our orderRef to get the orderId
return(await GetOrderById(orderRef / 10, cancellationToken));
}
public override bool IsValid(object value)
{
if (value is int intValue)
{
return(DammAlgorithm.IsValid(intValue));
}
else if (value is string stringValue && int.TryParse(stringValue, out intValue))
{
return(DammAlgorithm.IsValid(intValue));
}
return(false);
}
public async Task <IActionResult> VerifyOrderRef(string orderReference)
{
if (!int.TryParse(orderReference, out var orderRefAsInt))
{
return(Json("Order reference must only contain digits"));
}
if (!DammAlgorithm.IsValid(orderRefAsInt))
{
return(Json("Invalid reference number"));
}
var order = await _orderService.GetOrderByRef(orderRefAsInt, HttpContext.RequestAborted);
if (order == null)
{
return(Json("No order found with this id"));
}
return(Json(true));
}