using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Data;
using System.Windows;

namespace DTS.Common.Converters
{
    [ValueConversion(typeof(List<string>), typeof(Visibility))]
    public class StringListToVisibilityConverter : IValueConverter
    {

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (targetType != typeof(Visibility))
                throw new InvalidOperationException("The target must be a Visibility");

            return (((List<string>)value) ?? throw new InvalidOperationException()).Any() ? Visibility.Visible : Visibility.Collapsed;
        }

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