using System;
using System.Globalization;
using Avalonia;
using Avalonia.Data.Converters;

namespace DelauneyTriangulation.Models;

public class Converters
{
    
}

public sealed class EmptyStringIntConverter : IValueConverter
{
    public static readonly EmptyStringIntConverter Instance = new();

    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture) => value?.ToString();

    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        var s = value as string;
        if (string.IsNullOrWhiteSpace(s)) return 0;
        return int.TryParse(s, NumberStyles.Integer, culture, out var n) ? n : 0;
    }
}