VeloeMinecraftLauncher/VeloeMinecraftLauncher/MinecraftLauncher/Downloader.cs

using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Threading;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using VeloeMinecraftLauncher.ViewModels;
using VeloeMinecraftLauncher.Views;

namespace VeloeMinecraftLauncher.MinecraftLauncher
{
    internal static class Downloader
    {
        public static T DownloadAndDeserializeJsonData<T>(string url) where T : new()
        {
            using (var webClient = new HttpClient())
            {
                var jsonData = string.Empty;
                try
                {
                    Settings.logger.Debug($"Downloading: {url.Split('/').Last()}");
                    jsonData = webClient.GetStringAsync(url).Result;
                }
                catch (Exception ex)
                {
                    var message = ex.Message;
                    var stackTrace = ex.StackTrace;
                    Settings.logger.Error(ex.Message);
                    Settings.logger.Error(ex.StackTrace);
                    Exception innerException = ex.InnerException;
                    while (innerException is not null)
                    {
                        message += "\n" + innerException.Message;
                        stackTrace += "\n" + innerException.StackTrace;
                        Settings.logger.Error(innerException.Message);
                        Settings.logger.Error(innerException.StackTrace);
                        innerException = innerException.InnerException;
                    }

                    Dispatcher.UIThread.InvokeAsync(() =>
                    {
                        if (Avalonia.Application.Current.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
                        {
                            Dispatcher.UIThread.InvokeAsync(() =>
                            {
                                var ErrorMessageViewModel = new ErrorWindowViewModel(message, stackTrace);
                                var ErrorMessage = new ErrorWindow()
                                {
                                    DataContext = ErrorMessageViewModel
                                };
                                ErrorMessage.ShowDialog(desktop.MainWindow);
                            });
                        }
                    });
                 
                }

                if (string.IsNullOrEmpty(jsonData))
                {
                    Settings.logger.Warning("Empty string!");
                    return new T();
                }
                else
                {
                    //Settings.logger.Debug("Return serialized string.");
                    return JsonSerializer.Deserialize<T>(jsonData);
                }
                /*
                return string.IsNullOrEmpty(jsonData)
                            ? new T()
                            : JsonSerializer.Deserialize<T>(jsonData);*/
            }
        }

        public static void DownloadFile(string url, string path, string filename)
        {
            using (var webClient = new WebClient())
            {
                if (!Directory.Exists(path))
                    Directory.CreateDirectory(path);
                webClient.DownloadFileAsync(new System.Uri(url), path + "/" + filename);
            }
        }
    }
}