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// Copyright 2009-2022 Josh Close
// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0.
// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0.
// https://github.com/JoshClose/CsvHelper
using System.Globalization;
using System.Linq;
using CsvHelper.Configuration;
namespace CsvHelper.TypeConversion
{
/// <summary>
/// Converts a <see cref="bool"/> to and from a <see cref="string"/>.
/// </summary>
public class BooleanConverter : DefaultTypeConverter
{
/// <inheritdoc/>
public override object? ConvertFromString(string? text, IReaderRow row, MemberMapData memberMapData)
{
if (bool.TryParse(text, out var b))
{
return b;
}
if (short.TryParse(text, out var sh))
{
if (sh == 0)
{
return false;
}
if (sh == 1)
{
return true;
}
}
var t = (text ?? string.Empty).Trim();
foreach (var trueValue in memberMapData.TypeConverterOptions.BooleanTrueValues)
{
if (memberMapData.TypeConverterOptions.CultureInfo.CompareInfo.Compare(trueValue, t, CompareOptions.IgnoreCase) == 0)
{
return true;
}
}
foreach (var falseValue in memberMapData.TypeConverterOptions.BooleanFalseValues)
{
if (memberMapData.TypeConverterOptions.CultureInfo.CompareInfo.Compare(falseValue, t, CompareOptions.IgnoreCase) == 0)
{
return false;
}
}
return base.ConvertFromString(text, row, memberMapData);
}
/// <inheritdoc/>
public override string? ConvertToString(object? value, IWriterRow row, MemberMapData memberMapData)
{
var b = value as bool?;
if (b == true && memberMapData.TypeConverterOptions.BooleanTrueValues.Count > 0)
{
return memberMapData.TypeConverterOptions.BooleanTrueValues.First();
}
else if (b == false && memberMapData.TypeConverterOptions.BooleanFalseValues.Count > 0)
{
return memberMapData.TypeConverterOptions.BooleanFalseValues.First();
}
return base.ConvertToString(value, row, memberMapData);
}
}
}
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