inabox/InABox.Mobile/InABox.Mobile.Shared/Converters/AbstractConverter.cs

#nullable enable
using System;
using System.ComponentModel;
using System.Globalization;
using InABox.Core;
using JetBrains.Annotations;
using Xamarin.Forms;

namespace InABox.Mobile
{
    
    public abstract class AbstractConverter<TIn, TOut> : BindableObject, IValueConverter
    {
        
        protected abstract TOut? Convert(TIn? value, object? parameter = null);

        protected virtual TIn? Deconvert(TOut? value, object? parameter = null)
        {
            return default;
        }
        
        public object? Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var typed = value is TIn tin ? tin : default;
            return Convert(typed, parameter);
        }

        public object? ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var typed = value is TOut tout ? tout : default;
            return Deconvert(typed, parameter);
        }
        
    }
}