LocalizationManager.cs

using Microsoft.Extensions.Localization;
using NeuroAccessMaui.Exceptions;
using NeuroAccessMaui.Resources.Languages;
using System.ComponentModel;
using System.Globalization;
using Waher.Events;
 
namespace NeuroAccessMaui.Services.Localization
{
    public class LocalizationManager : INotifyPropertyChanged
    {
        private static LocalizationManager? current;
        public static LocalizationManager Current => current ??= new();
 
#pragma warning disable CA2211 // Non-constant fields should not be visible
        public static Type DefaultStringResource = typeof(AppResources);
        public static EventHandler<CultureInfo>? CurrentCultureChanged;
        public static EventHandler<FlowDirection>? FlowDirectionChanged;
#pragma warning restore CA2211 // Non-constant fields should not be visible
 
        public static IStringLocalizer GetStringLocalizer(Type? StringResource = null)
        {
            Type[] Arguments = [StringResource ?? DefaultStringResource];
            Type GenericType = typeof(IStringLocalizer<>).MakeGenericType(Arguments);
 
            try
            {
                return (IStringLocalizer)ServiceHelper.GetService(GenericType);
            }
            catch (Exception ex)
            {
                throw new LocalizationException("There is no localization service", ex);
            }
        }
 
        public static IStringLocalizer GetStringLocalizer<TStringResource>()
        {
            try
            {
                return ServiceHelper.GetService<IStringLocalizer<TStringResource>>();
            }
            catch (Exception ex)
            {
                throw new LocalizationException("There is no localization service", ex);
            }
        }
 
        public static FlowDirection FlowDirection
        {
            get
            {
                return CultureInfo.CurrentCulture.TextInfo.IsRightToLeft
                    ? FlowDirection.RightToLeft
                    : FlowDirection.LeftToRight;
            }
        }
 
        public CultureInfo CurrentCulture
        {
            get => CultureInfo.CurrentCulture;
 
            set
            {
                if (CultureInfo.CurrentCulture.Name == value.Name)
                {
                    return;
                }
 
                CultureInfo.CurrentCulture = value;
                CultureInfo.CurrentUICulture = value;
                CultureInfo.DefaultThreadCurrentCulture = value;
                CultureInfo.DefaultThreadCurrentUICulture = value;
 
                AppResources.Culture = value;
 
                CurrentCultureChanged.Raise(null, value);
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(this.CurrentCulture)));
 
                FlowDirectionChanged.Raise(this, FlowDirection);
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(FlowDirection)));
            }
        }
 
        public event PropertyChangedEventHandler? PropertyChanged;
    }
}