using System.Globalization;

/// Gib true zurück, wenn die Collection Werte enthält
namespace Jugenddienst_Stunden.Converter {
	internal class CollectionVisibilityConverter : IValueConverter {
		public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture) {
			if (value is IEnumerable<object> collection) {
				if ((string)parameter == "Invert")
					return !collection.Any();
				return collection.Any();
			}

			if ((string)parameter == "Invert")
				return true;
			return false;
		}

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