TrStringFormatMultiValuesConverter.cs

using Avalonia.Data.Converters;
using Avalonia.Markup.Xaml;
using System;
using System.Collections.Generic;
using System.Globalization;

namespace CodingSeb.Localization.Avalonia.Converters
{
    public class TrStringFormatMultiValuesConverter : IMultiValueConverter
    {
        public TrStringFormatMultiValuesConverter()
        {
            //WeakEventManager<Loc, CurrentLanguageChangedEventArgs>.AddHandler(Loc.Instance, nameof(Loc.Instance.CurrentLanguageChanged), CurrentLanguageChanged);
        }

        public TrStringFormatMultiValuesConverter(string textId)
        {
            TextId = textId;
            //WeakEventManager<Loc, CurrentLanguageChangedEventArgs>.AddHandler(Loc.Instance, nameof(Loc.Instance.CurrentLanguageChanged), CurrentLanguageChanged);
        }

        ~TrStringFormatMultiValuesConverter()
        {
            //WeakEventManager<Loc, CurrentLanguageChangedEventArgs>.RemoveHandler(Loc.Instance, nameof(Loc.Instance.CurrentLanguageChanged), CurrentLanguageChanged);
        }

        /// <summary>
        /// The text to return if no text correspond to textId in the current language
        /// </summary>
        public string DefaultText { get; set; }

        /// <summary>
        /// The language id in which to get the translation. To Specify if not CurrentLanguage
        /// </summary>
        public string LanguageId { get; set; }

        /// <summary>
        /// To force the use of a specific identifier
        /// </summary>
        [ConstructorArgument("textId")]
        public string TextId { get; set; }

        /// <summary>
        /// To provide a prefix to add at the begining of the translated text.
        /// </summary>
        public string Prefix { get; set; } = string.Empty;

        /// <summary>
        /// To provide a suffix to add at the end of the translated text.
        /// </summary>
        public string Suffix { get; set; } = string.Empty;

        public object Convert(IList<object> values, Type targetType, object parameter, CultureInfo culture) => Prefix + string.Format(string.IsNullOrEmpty(TextId) ? "" : Loc.Tr(TextId, DefaultText?.Replace("[apos]", "'"), LanguageId), values) + Suffix;

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) => throw new NotImplementedException();

        public object ProvideValue(IServiceProvider serviceProvider) => this;

        private void CurrentLanguageChanged(object sender, CurrentLanguageChangedEventArgs e)
        {
            //if (xamlTargetObject != null && xamlDependencyProperty != null)
            //{
            //    BindingOperations.GetMultiBindingExpression(xamlTargetObject, xamlDependencyProperty)?.UpdateTarget();
            //}
        }
    }
}