// Copyright (c) 2017-present schick Informatik
// Description: Converter to create trimmed entries for plaintext input text fields
//

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

using bsmd.database;

namespace ENI2.Util
{
    [ValueConversion(typeof(string), typeof(string))]
    public class TrimStringConverter : MarkupExtension, IValueConverter
    {
        private TrimStringConverter _converter;
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (!((string)value).IsNullOrEmpty())
            {
                return ((string)value).Trim();
            }
            return string.Empty;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return value;
        }

        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            if (_converter == null)
            {
                _converter = new TrimStringConverter();
            }
            return _converter;
        }
    }
}