public static Task <bool> ItemNumberValidator(PromptValidatorContext <string> promptContext, CancellationToken cancellationToken)
{
// check regex
var regex = new Regex(@"\d{9}", RegexOptions.IgnoreCase);
var match = regex.Match(promptContext.Recognized.Value);
if (match.Success)
{
var id = promptContext.Recognized.Value = match.Value;
// lookup item number to verify it exists
var item = _client.GetItemById(id);
// add to state
if (item != null)
{
return(Task.FromResult(true));
}
}
return(Task.FromResult(false));
}