using System;
using System.Globalization;
using System.Windows;
using System.Windows.Data;

namespace MasterAuthenticator
{
    public class NullToVisibilityConverter : IValueConverter
    {
        public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            if (value == null)
                return Visibility.Collapsed;

            if (value is string str && string.IsNullOrWhiteSpace(str))
                return Visibility.Collapsed;

            return Visibility.Visible;
        }

        public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}
