marechai/Marechai.App/Presentation/Converters/CompanyConverters.cs

using System;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Data;

namespace Marechai.App.Presentation.Converters;

/// <summary>
///     Converts null object to Collapsed visibility
/// </summary>
public class ObjectToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, string language) =>
        value != null ? Visibility.Visible : Visibility.Collapsed;

    public object ConvertBack(object value, Type targetType, object parameter, string language) =>
        throw new NotImplementedException();
}

/// <summary>
///     Converts empty/null string to Collapsed visibility
/// </summary>
public class StringToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, string language)
    {
        if(value is string str && !string.IsNullOrWhiteSpace(str)) return Visibility.Visible;

        return Visibility.Collapsed;
    }

    public object ConvertBack(object value, Type targetType, object parameter, string language) =>
        throw new NotImplementedException();
}

/// <summary>
///     Converts zero count to Collapsed visibility, otherwise Visible
/// </summary>
public class ZeroToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, string language)
    {
        if(value is int count && count > 0) return Visibility.Visible;

        if(value is long longCount && longCount > 0) return Visibility.Visible;

        return Visibility.Collapsed;
    }

    public object ConvertBack(object value, Type targetType, object parameter, string language) =>
        throw new NotImplementedException();
}