18 changed files with 159 additions and 384 deletions
--- a/Mlaumcherb.Client.Avalonia/Config.cs
+++ b/Mlaumcherb.Client.Avalonia/Config.cs
@ -1,12 +1,10 @@
 using Mlaumcherb.Client.Avalonia.зримое;
-using Mlaumcherb.Client.Avalonia.классы;
 using Mlaumcherb.Client.Avalonia.холопы;

 namespace Mlaumcherb.Client.Avalonia;

 public record Config
 {
-    [JsonRequired] public string config_version { get; set; } = "1.0.0";
    public bool debug { get; set; } = 
 #if DEBUG
        true;
@ -17,16 +15,10 @@ public record Config
    public int max_memory { get; set; } = 4096;
    public string minecraft_dir { get; set; } = ".";
    public bool download_java { get; set; } = true;
-    public bool redirect_game_output { get; set; } = false;
    public string? last_launched_version { get; set; }
    public int max_parallel_downloads { get; set; } = 16;
-    public VersionCatalogProps[] version_catalogs { get; set; } =
-    [
-        new() { Name = "Mojang", Url = "https://piston-meta.mojang.com/mc/game/version_manifest_v2.json" }
-    ];
    
-    
-    [JsonIgnore] private static IOPath _filePath = "config.json";
+    [JsonIgnore] static IOPath _filePath = "config.json";
    
    public static Config LoadFromFile()
    {
--- a/Mlaumcherb.Client.Avalonia/GameVersion.cs
+++ b/Mlaumcherb.Client.Avalonia/GameVersion.cs
@ -7,7 +7,6 @@ using Mlaumcherb.Client.Avalonia.классы;
 using Mlaumcherb.Client.Avalonia.сеть;
 using Mlaumcherb.Client.Avalonia.сеть.TaskFactories;
 using Mlaumcherb.Client.Avalonia.холопы;
-using Newtonsoft.Json.Linq;
 using static Mlaumcherb.Client.Avalonia.холопы.PathHelper;

 namespace Mlaumcherb.Client.Avalonia;
@ -27,9 +26,9 @@ public class GameVersion
    private CancellationTokenSource? _gameCts;
    private CommandTask<CommandResult>? _commandTask;

-    public static Task<List<GameVersionProps>> GetAllVersionsAsync()
+    public static async Task<List<GameVersionProps>> GetAllVersionsAsync()
    {
-        var propsList = new List<GameVersionProps>();
+        var propsSet = new HashSet<GameVersionProps>();
        
        // local descriptors
        Directory.Create(GetVersionsDir());
@ -39,12 +38,19 @@ public class GameVersion
            var d = new GameVersionProps(name, null);
            if(!File.Exists(d.LocalDescriptorPath))
                throw new Exception("Can't find version descriptor file in directory '{subdir}'. Rename it as directory name.");
-            propsList.Add(d);
+            propsSet.Add(d);
+        }
+        
+        // remote non-duplicating versions
+        foreach (var removeVersion in await Сеть.GetDownloadableVersions())
+        {
+           propsSet.Add(removeVersion);
        }
        
        // reverse sort
+        var propsList = propsSet.ToList();
        propsList.Sort((a, b) => b.CompareTo(a));
-        return Task.FromResult(propsList);
+        return propsList;
    }

    public static async Task<GameVersion> CreateFromPropsAsync(GameVersionProps props)
@ -54,7 +60,7 @@ public class GameVersion
            if (props.RemoteDescriptorUrl is null)
                throw new NullReferenceException("can't download game version descriptor '"
                                                 + props.Name + "', because RemoteDescriptorUrl is null");
-            await NetworkHelper.DownloadFile(props.RemoteDescriptorUrl, props.LocalDescriptorPath);
+            await Сеть.DownloadFile(props.RemoteDescriptorUrl, props.LocalDescriptorPath);
        }

        return new GameVersion(props);
@ -63,31 +69,8 @@ public class GameVersion
    private GameVersion(GameVersionProps props)
    {
        _props = props;
-        
        string descriptorText = File.ReadAllText(props.LocalDescriptorPath);
-        JObject descriptorRaw =  JObject.Parse(descriptorText);
-        
-        // Descriptors can inherit from other descriptors.
-        // For example, 1.12.2-forge-14.23.5.2860 inherits from 1.12.2
-        if (descriptorRaw.TryGetValue("inheritsFrom", out var v))
-        {
-            string parentDescriptorId = v.Value<string>() 
-                        ?? throw new Exception("inheritsFrom is null");
-            LauncherApp.Logger.LogInfo(Name, $"merging descriptor '{parentDescriptorId}' with '{Name}'");
-            IOPath parentDescriptorPath = GetVersionDescriptorPath(parentDescriptorId);
-            if (!File.Exists(parentDescriptorPath))
-                throw new Exception($"Версия '{Name} требует установить версию '{parentDescriptorId}'");
-            string parentDescriptorText = File.ReadAllText(parentDescriptorPath);
-            JObject parentDescriptorRaw = JObject.Parse(parentDescriptorText);
-            parentDescriptorRaw.Merge(descriptorRaw,
-                new JsonMergeSettings { MergeArrayHandling = MergeArrayHandling.Concat });
-            descriptorRaw = parentDescriptorRaw;
-            // removing dependency
-            descriptorRaw.Remove("inheritsFrom");
-            File.WriteAllText(props.LocalDescriptorPath, descriptorRaw.ToString());
-        }
-
-        _descriptor = descriptorRaw.ToObject<GameVersionDescriptor>()
+        _descriptor = JsonConvert.DeserializeObject<GameVersionDescriptor>(descriptorText)
                     ?? throw new Exception($"can't parse descriptor file '{props.LocalDescriptorPath}'");
        _javaArgs = new JavaArguments(_descriptor);
        _gameArgs = new GameArguments(_descriptor);
@ -106,7 +89,7 @@ public class GameVersion
            new LibrariesDownloadTaskFactory(_descriptor, _libraries),
            new VersionFileDownloadTaskFactory(_descriptor),
        ];
-        if (LauncherApp.Config.download_java)
+        if(LauncherApp.Config.download_java)
        {
            taskFactories.Add(new JavaDownloadTaskFactory(_descriptor));
        }
@ -214,13 +197,9 @@ public class GameVersion
        var command = Cli.Wrap(JavaExecutableFilePath.ToString())
            .WithWorkingDirectory(WorkingDirectory.ToString())
            .WithArguments(argsList)
-            .WithValidation(CommandResultValidation.None);
-        if (LauncherApp.Config.redirect_game_output)
-        {
-            command = command
            .WithStandardOutputPipe(PipeTarget.ToDelegate(LogGameOut))
-                .WithStandardErrorPipe(PipeTarget.ToDelegate(LogGameError));
-        }
+            .WithStandardErrorPipe(PipeTarget.ToDelegate(LogGameError))
+            .WithValidation(CommandResultValidation.None);
        LauncherApp.Logger.LogInfo(Name, "launching the game");
        LauncherApp.Logger.LogDebug(Name, "java: " + command.TargetFilePath);
        LauncherApp.Logger.LogDebug(Name, "working_dir: " + command.WorkingDirPath);
--- a/Mlaumcherb.Client.Avalonia/LauncherLogger.cs
+++ b/Mlaumcherb.Client.Avalonia/LauncherLogger.cs
@ -1,4 +1,6 @@
-namespace Mlaumcherb.Client.Avalonia;
+using Mlaumcherb.Client.Avalonia.зримое;
+
+namespace Mlaumcherb.Client.Avalonia;

 public class LauncherLogger : ILogger
 {
--- a/Mlaumcherb.Client.Avalonia/зримое/LauncherApp.axaml.cs
+++ b/Mlaumcherb.Client.Avalonia/зримое/LauncherApp.axaml.cs
@ -15,12 +15,6 @@ public class LauncherApp : Application
        Config = Config.LoadFromFile();
        Logger.DebugLogEnabled = Config.debug;
        AvaloniaXamlLoader.Load(this);
-        
-        // some file required by forge installer
-        if (!File.Exists("launcher_profiles.json"))
-        {
-            File.WriteAllText("launcher_profiles.json", "{}");
-        }
    }

    public override void OnFrameworkInitializationCompleted()
--- a/Mlaumcherb.Client.Avalonia/зримое/MainWindow.axaml
+++ b/Mlaumcherb.Client.Avalonia/зримое/MainWindow.axaml
@ -7,65 +7,26 @@
        Title="млаумчерб"
        Icon="avares://млаумчерб/капитал/кубе.ico"
        FontFamily="{StaticResource MonospaceFont}" FontSize="18"
-        MinWidth="800" MinHeight="400"
-        Width="800" Height="600"
+        MinWidth="1200" MinHeight="700"
+        Width="800" Height="500"
        WindowStartupLocation="CenterScreen">
-    <Grid RowDefinitions="* 30">
+    <Grid>
+        <Grid.RowDefinitions>* 30</Grid.RowDefinitions>
        <Image Grid.RowSpan="2" Stretch="UniformToFill"
               Source="avares://млаумчерб/капитал/фоне.png"/>
        
        <Grid Grid.Row="0" Margin="10">
-            <Grid.ColumnDefinitions>
-                <ColumnDefinition MinWidth="150"/>
-                <ColumnDefinition Width="2" />
-                <ColumnDefinition MinWidth="300"/>
-                <ColumnDefinition Width="2" />
-                <ColumnDefinition MinWidth="150"/>
-            </Grid.ColumnDefinitions>
-            
-            <GridSplitter Grid.Column="1" Background="Transparent" ResizeDirection="Columns" />
-            <GridSplitter Grid.Column="3" Background="Transparent" ResizeDirection="Columns"/>
+            <Grid.ColumnDefinitions>* 300 *</Grid.ColumnDefinitions>
            
            <!-- Central panel -->
-            <Border Grid.Column="2"
-                    Classes="dark_tr_bg white_border">
+            <Border Grid.Column="1" 
+                    Classes="dark_tr_bg white_border"
+                    Margin="10 0">
                <Grid>
                    <Grid.RowDefinitions>* 60</Grid.RowDefinitions>
-                    <ScrollViewer Grid.Row="0" 
-                              HorizontalScrollBarVisibility="Disabled"
-                              VerticalScrollBarVisibility="Auto">
-                        <StackPanel Margin="10" Spacing="10">
+                    <StackPanel Orientation="Vertical" Margin="10" Spacing="10">
                        <TextBlock>Версия:</TextBlock>
-                            <ComboBox Name="InstalledVersionComboBox"/>
-                            <Button Name="DeleteVersionButton" 
-                                    Click="DeleteVersionButton_OnClick">
-                                Удалить версию
-                            </Button>
-                            
-                            <Expander Header="Добавление версий"
-                                      BorderThickness="1" BorderBrush="Gray"
-                                      Padding="4">
-                                <StackPanel>
-                                    <TextBlock>Источник:</TextBlock>
-                                    <ComboBox Name="VersionCatalogComboBox"/>
-                                    <WrapPanel>
-                                        <CheckBox Name="ReleaseVersionTypeCheckBox" IsChecked="True">релиз</CheckBox>
-                                        <CheckBox Name="SnapshotVersionTypeCheckBox">снапшот</CheckBox>
-                                        <CheckBox Name="OldVersionTypeCheckBox">старое</CheckBox>
-                                        <CheckBox Name="OtherVersionTypeAlphaCheckBox">другое</CheckBox>
-                                    </WrapPanel>
-                                    <Button Name="SearchVersionsButton"
-                                            Click="SearchVersionsButton_OnClick">
-                                        Поиск
-                                    </Button>
-                                    <TextBlock>Доступные версии:</TextBlock>
-                                    <ComboBox Name="VersionCatalogItemsComboBox"/>
-                                    <Button Name="AddVersionButton" IsEnabled="False"
-                                        Click="AddVersionButton_OnClick">
-                                        Добавить
-                                    </Button>
-                                </StackPanel>
-                            </Expander>
+                        <ComboBox Name="VersionComboBox"/>
                        
                        <TextBlock>Ник:</TextBlock>
                        <TextBox Background="Transparent"
@ -90,13 +51,9 @@
                        <CheckBox IsChecked="{Binding #window.EnableJavaDownload}">
                            Скачивать джаву
                        </CheckBox>
-                            <CheckBox IsChecked="{Binding #window.RedirectGameOutput}">
-                                Выводить лог игры в лаунчер
-                            </CheckBox>
                    </StackPanel>
-                    </ScrollViewer>
                    <Button Name="LaunchButton" Grid.Row="1"
-                            Margin="10" Padding="4"
+                            Margin="10" Padding="0 0 0 4"
                            Classes="button_no_border"
                            Background="#BBfd7300"
                            Click="Запуск">
@ -108,7 +65,8 @@
            <!-- Left panel -->
            <Border Grid.Column="0" 
                    Classes="dark_tr_bg white_border">
-                <Grid RowDefinitions="36 *">
+                <Grid>
+                    <Grid.RowDefinitions>36 *</Grid.RowDefinitions>
                    <Border Classes="white_border" Margin="-1" Padding="4">
                        <DockPanel>
                            <TextBlock FontWeight="Bold"
@ -134,9 +92,9 @@
            </Border>
            
            <!-- Right panel -->
-            <Border Grid.Column="4"
-                    Classes="dark_tr_bg white_border">
-                <Grid RowDefinitions="36 *">
+            <Border Grid.Column="2" Classes="dark_tr_bg white_border">
+                <Grid>
+                    <Grid.RowDefinitions>36 *</Grid.RowDefinitions>
                    <Border Classes="white_border" Margin="-1" Padding="4">
                        <DockPanel>
                            <TextBlock FontWeight="Bold"
--- a/Mlaumcherb.Client.Avalonia/зримое/MainWindow.axaml.cs
+++ b/Mlaumcherb.Client.Avalonia/зримое/MainWindow.axaml.cs
@ -6,9 +6,6 @@ using Avalonia.Platform.Storage;
 using Avalonia.Threading;
 using Mlaumcherb.Client.Avalonia.классы;
 using Mlaumcherb.Client.Avalonia.холопы;
-using MsBox.Avalonia;
-using MsBox.Avalonia.Dto;
-using MsBox.Avalonia.Models;

 namespace Mlaumcherb.Client.Avalonia.зримое;

@ -51,15 +48,6 @@ public partial class MainWindow : Window
        set => SetValue(EnableJavaDownloadProperty, value);
    }
    
-    public static readonly StyledProperty<bool> RedirectGameOutputProperty =
-        AvaloniaProperty.Register<MainWindow, bool>(nameof(RedirectGameOutput),
-            defaultBindingMode: BindingMode.TwoWay, defaultValue: false);
-    public bool RedirectGameOutput
-    {
-        get => GetValue(RedirectGameOutputProperty);
-        set => SetValue(RedirectGameOutputProperty, value);
-    }
-    
    public MainWindow()
    {
        InitializeComponent();
@ -74,28 +62,20 @@ public partial class MainWindow : Window
            PlayerName = LauncherApp.Config.player_name;
            MemoryLimit = LauncherApp.Config.max_memory;
            EnableJavaDownload = LauncherApp.Config.download_java;
-            RedirectGameOutput = LauncherApp.Config.redirect_game_output;

-            InstalledVersionComboBox.SelectedIndex = 0;
-            InstalledVersionComboBox.IsEnabled = false;
+            VersionComboBox.SelectedIndex = 0;
+            VersionComboBox.IsEnabled = false;
            var versions = await GameVersion.GetAllVersionsAsync();
            Dispatcher.UIThread.Invoke(() =>
            {
                foreach (var p in versions)
                {
-                    InstalledVersionComboBox.Items.Add(new VersionItemView(p));
-                    // select last played version
+                    VersionComboBox.Items.Add(new VersionItemView(p));
                    if (LauncherApp.Config.last_launched_version != null &&
                        p.Name == LauncherApp.Config.last_launched_version)
-                        InstalledVersionComboBox.SelectedIndex = InstalledVersionComboBox.Items.Count - 1;
+                        VersionComboBox.SelectedIndex = VersionComboBox.Items.Count - 1;
                }
-                InstalledVersionComboBox.IsEnabled = true;
-
-                foreach (var vc in LauncherApp.Config.version_catalogs)
-                {
-                    VersionCatalogComboBox.Items.Add(vc);
-                }
-                VersionCatalogComboBox.SelectedIndex = 0;
+                VersionComboBox.IsEnabled = true;
            });
        }
        catch (Exception ex)
@ -123,13 +103,12 @@ public partial class MainWindow : Window
        {
            Dispatcher.UIThread.Invoke(() => LaunchButton.IsEnabled = false);
            
-            var selectedVersionView = (VersionItemView?)InstalledVersionComboBox.SelectedItem;
+            var selectedVersionView = (VersionItemView?)VersionComboBox.SelectedItem;
            var selectedVersion = selectedVersionView?.Props;
            LauncherApp.Config.last_launched_version = selectedVersion?.Name;
            LauncherApp.Config.player_name = PlayerName;
            LauncherApp.Config.max_memory = MemoryLimit;
            LauncherApp.Config.download_java = EnableJavaDownload;
-            LauncherApp.Config.redirect_game_output = RedirectGameOutput;
            LauncherApp.Config.SaveToFile();
            if (selectedVersion == null) 
                return;
@ -217,94 +196,4 @@ public partial class MainWindow : Window
        }
        DownloadsPanel.Children.Clear();
    }
-
-    private async void DeleteVersionButton_OnClick(object? sender, RoutedEventArgs e)
-    {
-        try
-        {
-            VersionItemView? sel = InstalledVersionComboBox.SelectedItem as VersionItemView;
-            if(sel is null)
-                return;
-        
-            var box = MessageBoxManager.GetMessageBoxCustom(new MessageBoxCustomParams
-                {
-                    ButtonDefinitions = new List<ButtonDefinition> { new() { Name = "Да" }, new() { Name = "Нет" } },
-                    ContentTitle = $"Удаление версии {sel.Props.Name}",
-                    ContentMessage = $"Вы уверены, что хотите удалить версию {sel.Props.Name}? Все файлы, включая сохранения, будут удалены!",
-                    Icon = MsBox.Avalonia.Enums.Icon.Question,
-                    WindowStartupLocation = WindowStartupLocation.CenterOwner,
-                    SizeToContent = SizeToContent.WidthAndHeight,
-                    ShowInCenter = true,
-                    Topmost = true
-                }
-            );
-            var result = await box.ShowAsync().ConfigureAwait(false);
-            if (result != "Да") 
-                return;
-            
-            sel.Props.DeleteFiles();
-            Dispatcher.UIThread.Invoke(() =>
-            {
-                InstalledVersionComboBox.Items.Remove(sel);
-            });
-        }
-        catch (Exception ex)
-        {
-            ErrorHelper.ShowMessageBox(nameof(MainWindow), ex);
-        }
-    }
-    
-    private async void SearchVersionsButton_OnClick(object? sender, RoutedEventArgs e)
-    {
-        try 
-        {
-            var catalogProps = VersionCatalogComboBox.SelectedItem as VersionCatalogProps;
-            if(catalogProps is null)
-                return;
-
-            var catalog = await catalogProps.GetVersionCatalogAsync();
-            var searchParams = new VersionSearchParams();
-            Dispatcher.UIThread.Invoke(() =>
-            {
-                searchParams.ReleaseTypeAllowed = ReleaseVersionTypeCheckBox.IsChecked ?? false;
-                searchParams.SnapshotTypeAllowed = SnapshotVersionTypeCheckBox.IsChecked ?? false;
-                searchParams.OldTypeAllowed = OldVersionTypeCheckBox.IsChecked ?? false;
-                searchParams.OtherTypeAllowed = OtherVersionTypeAlphaCheckBox.IsChecked ?? false;
-            });
-            var versions = catalog.GetDownloadableVersions(searchParams);
-            
-            Dispatcher.UIThread.Invoke(() =>
-            {
-                VersionCatalogItemsComboBox.IsEnabled = false;
-                VersionCatalogItemsComboBox.Items.Clear();
-                foreach (var p in versions)
-                {
-                    VersionCatalogItemsComboBox.Items.Add(new VersionItemView(p));
-                }
-                VersionCatalogItemsComboBox.IsEnabled = true;
-                AddVersionButton.IsEnabled = versions.Count > 0;
-            });
-        }
-        catch (Exception ex)
-        {
-           ErrorHelper.ShowMessageBox(nameof(MainWindow), ex);
-        }
-    }
-
-    private void AddVersionButton_OnClick(object? sender, RoutedEventArgs e)
-    {
-        try
-        {
-            var selectedVersionView = VersionCatalogItemsComboBox.SelectedItem as VersionItemView;
-            if(selectedVersionView is null)
-                return;
-            
-            InstalledVersionComboBox.Items.Insert(0, new VersionItemView(selectedVersionView.Props));
-            InstalledVersionComboBox.SelectedIndex = 0;
-        }
-        catch (Exception ex)
-        {
-            ErrorHelper.ShowMessageBox(nameof(MainWindow), ex);
-        }
-    }
 }
--- a/Mlaumcherb.Client.Avalonia/зримое/VersionItemView.axaml
+++ b/Mlaumcherb.Client.Avalonia/зримое/VersionItemView.axaml
@ -4,7 +4,6 @@
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:local="clr-namespace:Mlaumcherb.Client.Avalonia"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="Mlaumcherb.Client.Avalonia.зримое.VersionItemView"
-             Padding="2">
+             x:Class="Mlaumcherb.Client.Avalonia.зримое.VersionItemView">
    <TextBlock Name="text" Background="Transparent"/>
 </UserControl>
--- a/Mlaumcherb.Client.Avalonia/зримое/VersionItemView.axaml.cs
+++ b/Mlaumcherb.Client.Avalonia/зримое/VersionItemView.axaml.cs
@ -1,6 +1,5 @@
 using Avalonia.Controls;
 using Avalonia.Media;
-using Avalonia.Threading;
 using Mlaumcherb.Client.Avalonia.классы;

 namespace Mlaumcherb.Client.Avalonia.зримое;
@ -21,14 +20,12 @@ public partial class VersionItemView : ListBoxItem
        Props = props;
        InitializeComponent();
        text.Text = props.Name;
-        props.StatusChanged += UpdateBackground;
-        UpdateBackground(props.IsDownloaded);
+        props.OnDownloadCompleted += UpdateBackground;
+        UpdateBackground();
    }

-    private void UpdateBackground(bool isDownloaded)
+    private void UpdateBackground()
    {
-        Dispatcher.UIThread.Invoke(() => 
-            Background = isDownloaded ? _avaliableColor : _unavaliableColor
-        );
+        Background = Props.IsDownloaded ? _avaliableColor : _unavaliableColor;
    }
 }
--- a/Mlaumcherb.Client.Avalonia/классы/Буржуазия/GameVersionCatalog.cs
+++ b/Mlaumcherb.Client.Avalonia/классы/Буржуазия/GameVersionCatalog.cs
@ -1,35 +1,8 @@
 namespace Mlaumcherb.Client.Avalonia.классы;

-public record VersionSearchParams
-{
-    public bool ReleaseTypeAllowed;
-    public bool SnapshotTypeAllowed;
-    public bool OldTypeAllowed;
-    public bool OtherTypeAllowed;
-}
-
 public class GameVersionCatalog
 {
    [JsonRequired] public List<RemoteVersionDescriptorProps> versions { get; set; } = null!;
-    
-    /// <returns>empty list if couldn't find any remote versions</returns>
-    public List<GameVersionProps> GetDownloadableVersions(VersionSearchParams p)
-    {
-        var _versionPropsList = new List<GameVersionProps>();
-        foreach (var r in versions)
-        {
-            bool match = r.type switch
-            {
-                "release" => p.ReleaseTypeAllowed,
-                "snapshot" => p.SnapshotTypeAllowed,
-                "old_alpha" or "old_beta" => p.OldTypeAllowed,
-                _ => p.OtherTypeAllowed
-            };
-            if(match)
-                _versionPropsList.Add(new GameVersionProps(r.id, r.url));
-        }
-        return _versionPropsList;
-    }
 }

 public class AssetProperties
@ -46,9 +19,9 @@ public class AssetIndex
 public class RemoteVersionDescriptorProps
 {
    [JsonRequired] public string id { get; set; } = "";
-    [JsonRequired] public string url { get; set; } = "";
    [JsonRequired] public string type { get; set; } = "";
-    public string sha1 { get; set; } = "";
-    public DateTime time { get; set; }
-    public DateTime releaseTime { get; set; }
+    [JsonRequired] public string url { get; set; } = "";
+    [JsonRequired] public string sha1 { get; set; } = "";
+    [JsonRequired] public DateTime time { get; set; }
+    [JsonRequired] public DateTime releaseTime { get; set; }
 }
--- a/Mlaumcherb.Client.Avalonia/классы/Буржуазия/GameVersionDescriptor.cs
+++ b/Mlaumcherb.Client.Avalonia/классы/Буржуазия/GameVersionDescriptor.cs
@ -10,10 +10,10 @@ public class GameVersionDescriptor
    [JsonRequired] public DateTime releaseTime { get; set; }
    [JsonRequired] public string type { get; set; } = "";
    [JsonRequired] public string mainClass { get; set; } = "";
+    [JsonRequired] public Downloads downloads { get; set; } = null!;
    [JsonRequired] public List<Library> libraries { get; set; } = null!;
    [JsonRequired] public AssetIndexProperties assetIndex { get; set; } = null!;
    [JsonRequired] public string assets { get; set; } = "";
-    public Downloads? downloads { get; set; } = null;
    public JavaVersion javaVersion { get; set; } = new() { component = "jre-legacy", majorVersion = 8 };
    public string? minecraftArguments { get; set; }
    public ArgumentsNew? arguments { get; set; }
@ -21,7 +21,6 @@ public class GameVersionDescriptor

 public class Artifact
 {
-    public string? path = null;
    [JsonRequired] public string url { get; set; } = "";
    [JsonRequired] public string sha1 { get; set; } = "";
    [JsonRequired] public int size { get; set; }
--- a/Mlaumcherb.Client.Avalonia/классы/Пролетариат/GameVersionProps.cs
+++ b/Mlaumcherb.Client.Avalonia/классы/Пролетариат/GameVersionProps.cs
@ -1,5 +1,4 @@
-using Mlaumcherb.Client.Avalonia.зримое;
-using Mlaumcherb.Client.Avalonia.холопы;
+using Mlaumcherb.Client.Avalonia.холопы;

 namespace Mlaumcherb.Client.Avalonia.классы;

@ -14,14 +13,13 @@ public class GameVersionProps : IComparable<GameVersionProps>, IEquatable<GameVe
        get => _isDownloaded;
        set
        {
-            if(_isDownloaded != value)
-            {
+            bool downloadCompleted = value && !_isDownloaded;
            _isDownloaded = value;
-                StatusChanged?.Invoke(value);
+            if(downloadCompleted)
+                OnDownloadCompleted?.Invoke();
        }
    }
-    }
-    public event Action<bool>? StatusChanged;
+    public event Action? OnDownloadCompleted;

    public GameVersionProps(string name, string? url)
    {
@ -31,16 +29,6 @@ public class GameVersionProps : IComparable<GameVersionProps>, IEquatable<GameVe
        IsDownloaded = File.Exists(PathHelper.GetVersionJarFilePath(name));
    }

-    public void DeleteFiles()
-    {
-        IsDownloaded = false;
-        LauncherApp.Logger.LogInfo(Name, "Deleting files...");
-        var verdir = PathHelper.GetVersionDir(Name);
-        if(Directory.Exists(verdir))
-            Directory.Delete(verdir);
-        LauncherApp.Logger.LogInfo(Name, "Files deleted");
-    }
-    
    public override string ToString() => Name;

    public override int GetHashCode() => Name.GetHashCode();
--- a/Mlaumcherb.Client.Avalonia/классы/Пролетариат/Libraries.cs
+++ b/Mlaumcherb.Client.Avalonia/классы/Пролетариат/Libraries.cs
@ -13,18 +13,6 @@ public class Libraries
    
    public IReadOnlyCollection<JarLib> Libs { get; }
    
-    private IOPath GetJarFilePath(Artifact artifact)
-    {
-        string relativePath;
-        if (!string.IsNullOrEmpty(artifact.path))
-            relativePath = artifact.path;
-        else if (!string.IsNullOrEmpty(artifact.url))
-            relativePath = artifact.url.AsSpan().After("://").After('/').ToString();
-        else throw new ArgumentException("Artifact must have a path or url");
-
-        return Path.Concat(PathHelper.GetLibrariesDir(), relativePath);
-    }
-    
    public Libraries(GameVersionDescriptor descriptor)
    {
        List<JarLib> libs = new();
@ -67,7 +55,9 @@ public class Libraries
                if(!libHashes.Add(artifact.sha1))
                    continue;

-                libs.Add(new NativeLib(l.name, GetJarFilePath(artifact), artifact, l.extract));
+                string urlTail = artifact.url.AsSpan().After("://").After('/').ToString();
+                IOPath jarFilePath = Path.Concat(PathHelper.GetLibrariesDir(), urlTail);
+                libs.Add(new NativeLib(l.name, jarFilePath, artifact, l.extract));
            }
            else
            {
@ -79,7 +69,9 @@ public class Libraries
                if(!libHashes.Add(artifact.sha1))
                    continue;
                
-                libs.Add(new JarLib(l.name, GetJarFilePath(artifact), artifact));
+                string urlTail = artifact.url.AsSpan().After("://").After('/').ToString();
+                IOPath jarFilePath = Path.Concat(PathHelper.GetLibrariesDir(), urlTail);
+                libs.Add(new JarLib(l.name, jarFilePath, artifact));
            }
        }

--- a/Mlaumcherb.Client.Avalonia/классы/Пролетариат/VersionCatalogProps.cs
+++ b/Mlaumcherb.Client.Avalonia/классы/Пролетариат/VersionCatalogProps.cs
@ -1,18 +0,0 @@
-using Mlaumcherb.Client.Avalonia.сеть;
-
-namespace Mlaumcherb.Client.Avalonia.классы;
-
-
-public class VersionCatalogProps
-{
-    [JsonRequired] public required string Name { get; init; }
-    [JsonRequired] public required string Url { get; init; }
-        
-    public override string ToString() => Name;
-    
-    
-    public async Task<GameVersionCatalog> GetVersionCatalogAsync()
-    {
-        return await NetworkHelper.DownloadStringAndDeserialize<GameVersionCatalog>(Url);
-    }
-}
--- a/Mlaumcherb.Client.Avalonia/сеть/TaskFactories/AssetsDownloadTaskFactory.cs
+++ b/Mlaumcherb.Client.Avalonia/сеть/TaskFactories/AssetsDownloadTaskFactory.cs
@ -5,7 +5,7 @@ using DTLib.Extensions;
 using Mlaumcherb.Client.Avalonia.зримое;
 using Mlaumcherb.Client.Avalonia.классы;
 using Mlaumcherb.Client.Avalonia.холопы;
-using static Mlaumcherb.Client.Avalonia.сеть.NetworkHelper;
+using static Mlaumcherb.Client.Avalonia.сеть.Сеть;

 namespace Mlaumcherb.Client.Avalonia.сеть.TaskFactories;

@ -39,9 +39,9 @@ public class AssetsDownloadTaskFactory : INetworkTaskFactory
    {
        if(!File.Exists(_indexFilePath))
        {
-            LauncherApp.Logger.LogInfo(nameof(NetworkHelper), $"started downloading asset index to '{_indexFilePath}'");
+            LauncherApp.Logger.LogInfo(nameof(Сеть), $"started downloading asset index to '{_indexFilePath}'");
            await DownloadFile(_descriptor.assetIndex.url, _indexFilePath);
-            LauncherApp.Logger.LogInfo(nameof(NetworkHelper), "finished downloading asset index");
+            LauncherApp.Logger.LogInfo(nameof(Сеть), "finished downloading asset index");
        }

        string indexFileText = File.ReadAllText(_indexFilePath);
@ -102,7 +102,7 @@ public class AssetsDownloadTaskFactory : INetworkTaskFactory
    
    private async Task Download(NetworkProgressReporter pr, CancellationToken ct)
    {
-        LauncherApp.Logger.LogInfo(nameof(NetworkHelper), $"started downloading assets '{_descriptor.assetIndex.id}'");
+        LauncherApp.Logger.LogInfo(nameof(Сеть), $"started downloading assets '{_descriptor.assetIndex.id}'");
        ParallelOptions opt = new()
        {
            MaxDegreeOfParallelism = LauncherApp.Config.max_parallel_downloads,
@ -114,7 +114,7 @@ public class AssetsDownloadTaskFactory : INetworkTaskFactory
            bool completed = false;
            while(!completed)
            {
-                LauncherApp.Logger.LogDebug(nameof(NetworkHelper), $"downloading asset '{a.name}' {a.hash}");
+                LauncherApp.Logger.LogDebug(nameof(Сеть), $"downloading asset '{a.name}' {a.hash}");
                try
                {
                    await DownloadFile(a.url, a.filePath, _ct, pr.AddBytesCount);
@ -125,13 +125,13 @@ public class AssetsDownloadTaskFactory : INetworkTaskFactory
                    // wait on rate limit
                    if(httpException.StatusCode == HttpStatusCode.TooManyRequests)
                    {
-                        LauncherApp.Logger.LogDebug(nameof(NetworkHelper), "rate limit hit");
+                        LauncherApp.Logger.LogDebug(nameof(Сеть), "rate limit hit");
                        await Task.Delay(1000, _ct);
                    }
                    else throw;
                }
            }
        });
-        LauncherApp.Logger.LogInfo(nameof(NetworkHelper), $"finished downloading assets '{_descriptor.assetIndex.id}'");
+        LauncherApp.Logger.LogInfo(nameof(Сеть), $"finished downloading assets '{_descriptor.assetIndex.id}'");
    }
 }
--- a/Mlaumcherb.Client.Avalonia/сеть/TaskFactories/JavaDownloadTaskFactory.cs
+++ b/Mlaumcherb.Client.Avalonia/сеть/TaskFactories/JavaDownloadTaskFactory.cs
@ -3,7 +3,7 @@ using DTLib.Extensions;
 using Mlaumcherb.Client.Avalonia.зримое;
 using Mlaumcherb.Client.Avalonia.классы;
 using Mlaumcherb.Client.Avalonia.холопы;
-using static Mlaumcherb.Client.Avalonia.сеть.NetworkHelper;
+using static Mlaumcherb.Client.Avalonia.сеть.Сеть;

 namespace Mlaumcherb.Client.Avalonia.сеть.TaskFactories;

@ -84,7 +84,7 @@ public class JavaDownloadTaskFactory : INetworkTaskFactory

    private async Task Download(NetworkProgressReporter pr, CancellationToken ct)
    {
-        LauncherApp.Logger.LogInfo(nameof(NetworkHelper), "started downloading java runtime " +
+        LauncherApp.Logger.LogInfo(nameof(Сеть), "started downloading java runtime " +
                    $"{_descriptor.javaVersion.majorVersion} '{_descriptor.javaVersion.component}'");
        
        ParallelOptions opt = new()
@ -96,7 +96,7 @@ public class JavaDownloadTaskFactory : INetworkTaskFactory
        {
            if (f.props.downloads!.lzma != null)
            {
-                LauncherApp.Logger.LogDebug(nameof(NetworkHelper), $"downloading lzma-compressed file '{f.path}'");
+                LauncherApp.Logger.LogDebug(nameof(Сеть), $"downloading lzma-compressed file '{f.path}'");
                await using var pipe = new TransformStream(await GetStream(f.props.downloads.lzma.url, _ct));
                pipe.AddTransform(pr.AddBytesCount);
                await using var fs = File.OpenWrite(f.path);
@ -104,18 +104,18 @@ public class JavaDownloadTaskFactory : INetworkTaskFactory
            }
            else
            {
-                LauncherApp.Logger.LogDebug(nameof(NetworkHelper), $"downloading raw file '{f.path}'");
+                LauncherApp.Logger.LogDebug(nameof(Сеть), $"downloading raw file '{f.path}'");
                await DownloadFile(f.props.downloads.raw.url, f.path, _ct, pr.AddBytesCount);
            }
            
            if(!OperatingSystem.IsWindows() && f.props.executable is true)
            {
-                LauncherApp.Logger.LogDebug(nameof(NetworkHelper), $"adding execute rights to file '{f.path}'");
+                LauncherApp.Logger.LogDebug(nameof(Сеть), $"adding execute rights to file '{f.path}'");
                System.IO.File.SetUnixFileMode(f.path.ToString(), UnixFileMode.UserExecute);
            }
        });
        
-        LauncherApp.Logger.LogInfo(nameof(NetworkHelper), "finished downloading java runtime " + 
+        LauncherApp.Logger.LogInfo(nameof(Сеть), "finished downloading java runtime " + 
                    $"{_descriptor.javaVersion.majorVersion} '{_descriptor.javaVersion.component}'");
    }
    
--- a/Mlaumcherb.Client.Avalonia/сеть/TaskFactories/LibrariesDownloadTaskFactory.cs
+++ b/Mlaumcherb.Client.Avalonia/сеть/TaskFactories/LibrariesDownloadTaskFactory.cs
@ -4,7 +4,7 @@ using DTLib.Extensions;
 using Mlaumcherb.Client.Avalonia.зримое;
 using Mlaumcherb.Client.Avalonia.классы;
 using Mlaumcherb.Client.Avalonia.холопы;
-using static Mlaumcherb.Client.Avalonia.сеть.NetworkHelper;
+using static Mlaumcherb.Client.Avalonia.сеть.Сеть;

 namespace Mlaumcherb.Client.Avalonia.сеть.TaskFactories;

@ -73,7 +73,7 @@ public class LibrariesDownloadTaskFactory : INetworkTaskFactory

    private async Task Download(NetworkProgressReporter pr, CancellationToken ct)
    {
-        LauncherApp.Logger.LogInfo(nameof(NetworkHelper), $"started downloading libraries '{_descriptor.id}'");
+        LauncherApp.Logger.LogInfo(nameof(Сеть), $"started downloading libraries '{_descriptor.id}'");
        
        ParallelOptions opt = new()
        {
@ -82,9 +82,7 @@ public class LibrariesDownloadTaskFactory : INetworkTaskFactory
        };
        await Parallel.ForEachAsync(_libsToDownload, opt, async (l, _ct) =>
        {
-            LauncherApp.Logger.LogDebug(nameof(NetworkHelper), $"downloading library '{l.name}' to '{l.jarFilePath}'");
-            if(string.IsNullOrEmpty(l.artifact.url))
-                throw new Exception($"library '{l.name}' doesn't have a url to download");
+            LauncherApp.Logger.LogDebug(nameof(Сеть), $"downloading library '{l.name}' to '{l.jarFilePath}'");
            await DownloadFile(l.artifact.url, l.jarFilePath, _ct, pr.AddBytesCount);
            if (l is Libraries.NativeLib n)
            {
@ -104,6 +102,6 @@ public class LibrariesDownloadTaskFactory : INetworkTaskFactory
            }
        });
        
-        LauncherApp.Logger.LogInfo(nameof(NetworkHelper), $"finished downloading libraries '{_descriptor.id}'");
+        LauncherApp.Logger.LogInfo(nameof(Сеть), $"finished downloading libraries '{_descriptor.id}'");
    }
 }
--- a/Mlaumcherb.Client.Avalonia/сеть/TaskFactories/VersionFileDownloadTaskFactory.cs
+++ b/Mlaumcherb.Client.Avalonia/сеть/TaskFactories/VersionFileDownloadTaskFactory.cs
@ -3,7 +3,7 @@ using DTLib.Extensions;
 using Mlaumcherb.Client.Avalonia.зримое;
 using Mlaumcherb.Client.Avalonia.классы;
 using Mlaumcherb.Client.Avalonia.холопы;
-using static Mlaumcherb.Client.Avalonia.сеть.NetworkHelper;
+using static Mlaumcherb.Client.Avalonia.сеть.Сеть;

 namespace Mlaumcherb.Client.Avalonia.сеть.TaskFactories;

@ -36,13 +36,8 @@ public class VersionFileDownloadTaskFactory : INetworkTaskFactory
    {
        if (!File.Exists(_filePath))
            return false;
-        
        if (!checkHashes)
            return true;
-
-        if (_descriptor.downloads is null)
-            return true;
-        
        using var fs = File.OpenRead(_filePath);
        string hash = _hasher.ComputeHash(fs).HashToString();
        return hash == _descriptor.downloads.client.sha1;
@ -50,18 +45,13 @@ public class VersionFileDownloadTaskFactory : INetworkTaskFactory

    private long GetTotalSize()
    {
-        if(_descriptor.downloads is null)
-            return 0;
        return _descriptor.downloads.client.size;
    }
    
    private async Task Download(NetworkProgressReporter pr, CancellationToken ct)
    {
-        if (_descriptor.downloads is null)
-            throw new Exception($"can't download version file '{_descriptor.id}' because it has no download url");
-        
-        LauncherApp.Logger.LogInfo(nameof(NetworkHelper), $"started downloading version file '{_descriptor.id}'");
+        LauncherApp.Logger.LogInfo(nameof(Сеть), $"started downloading version file '{_descriptor.id}'");
        await DownloadFile(_descriptor.downloads.client.url, _filePath, ct, pr.AddBytesCount);
-        LauncherApp.Logger.LogInfo(nameof(NetworkHelper), $"finished downloading version file '{_descriptor.id}'");
+        LauncherApp.Logger.LogInfo(nameof(Сеть), $"finished downloading version file '{_descriptor.id}'");
    }
 }
--- a/Mlaumcherb.Client.Avalonia/сеть/NetworkHelper.cs
+++ b/Mlaumcherb.Client.Avalonia/сеть/NetworkHelper.cs
@ -4,11 +4,11 @@ using Mlaumcherb.Client.Avalonia.классы;

 namespace Mlaumcherb.Client.Avalonia.сеть;

-public static class NetworkHelper
+public static class Сеть
 {
    private static HttpClient _http = new();

-    static NetworkHelper()
+    static Сеть()
    {
        // thanks for Sashok :3
        // https://github.com/new-sashok724/Launcher/blob/23485c3f7de6620d2c6b7b2dd9339c3beb6a0366/Launcher/source/helper/IOHelper.java#L259
@ -36,9 +36,52 @@ public static class NetworkHelper
    
    public static async Task<T> DownloadStringAndDeserialize<T>(string url)
    {
-        var text = await GetString(url);
+        var text = await _http.GetStringAsync(url);
        var result = JsonConvert.DeserializeObject<T>(text)
            ?? throw new Exception($"can't deserialize {typeof(T).Name}");
        return result;
    }
+    
+    private static readonly string[] VERSION_MANIFEST_URLS =
+    {
+        "https://piston-meta.mojang.com/mc/game/version_manifest_v2.json"
+    };
+
+    private static async Task<List<RemoteVersionDescriptorProps>> GetRemoteVersionDescriptorsAsync()
+    {
+        List<RemoteVersionDescriptorProps> descriptors = new();
+        foreach (var url in VERSION_MANIFEST_URLS)
+        {
+            try
+            {
+                var catalog = await DownloadStringAndDeserialize<GameVersionCatalog>(url);
+                descriptors.AddRange(catalog.versions);
+            }
+            catch (Exception ex)
+            {
+                LauncherApp.Logger.LogWarn(nameof(Сеть), ex);
+            }
+        }
+
+        return descriptors;
+    }
+
+    private static List<GameVersionProps>? _versionPropsList;
+
+    /// <returns>empty list if couldn't find any remote versions</returns>
+    public static async Task<IReadOnlyList<GameVersionProps>> GetDownloadableVersions()
+    {
+        if (_versionPropsList == null)
+        {
+            _versionPropsList = new();
+            var rvdlist = await GetRemoteVersionDescriptorsAsync();
+            foreach (var r in rvdlist)
+            {
+                if (r.type == "release")
+                    _versionPropsList.Add(new GameVersionProps(r.id, r.url));
+            }
+        }
+
+        return _versionPropsList;
+    }
 }