﻿// -----------------------------------------------------------------------
// <copyright file="TZToStringConverter.cs" company="">
// Copyright 2013 Alexander Soffronow Pagonidis
// </copyright>
// -----------------------------------------------------------------------

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

namespace QDMSServer
{
    class TZToStringConverter : IValueConverter
    {
        /// <summary>
        /// Converts a value. 
        /// </summary>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        /// <param name="value">The value produced by the binding source.</param><param name="targetType">The type of the binding target property.</param><param name="parameter">The converter parameter to use.</param><param name="culture">The culture to use in the converter.</param>
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null) return null;
            return TimeZoneInfo.FindSystemTimeZoneById((string)value);
        }

        /// <summary>
        /// Converts a value. 
        /// </summary>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        /// <param name="value">The value that is produced by the binding target.</param><param name="targetType">The type to convert to.</param><param name="parameter">The converter parameter to use.</param><param name="culture">The culture to use in the converter.</param>
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null) return null;
            return ((TimeZoneInfo)value).Id;
        }
    }
}
