Compression

src/AppCommon/FileTime.App.Core.Abstraction/Services/IIdentifiableUserCommandService.cs

@@ -4,7 +4,7 @@ namespace FileTime.App.Core.Services;
 
 public interface IIdentifiableUserCommandService
 {
-    void AddIdentifiableUserCommandFactory(string identifier, IIdentifiableUserCommand commandFactory);
+    void AddIdentifiableUserCommand(IIdentifiableUserCommand command);
     IIdentifiableUserCommand? GetCommand(string identifier);
     IReadOnlyCollection<string> GetCommandIdentifiers();
     IReadOnlyDictionary<string, IIdentifiableUserCommand> IdentifiableUserCommands { get; }

src/AppCommon/FileTime.App.Core.Abstraction/Services/UserCommandHandler/AggregatedUserCommandHandler.cs

@@ -0,0 +1,26 @@
+namespace FileTime.App.Core.Services.UserCommandHandler;
+
+public abstract class AggregatedUserCommandHandler : IUserCommandHandler
+{
+    private readonly List<IUserCommandHandler> _userCommandHandlers = new();
+
+    public bool CanHandleCommand(UserCommand.IUserCommand command) => _userCommandHandlers.Any(h => h.CanHandleCommand(command));
+
+    public async Task HandleCommandAsync(UserCommand.IUserCommand command)
+    {
+        var handler = _userCommandHandlers.Find(h => h.CanHandleCommand(command));
+
+        if (handler is null) return;
+        await handler.HandleCommandAsync(command);
+    }
+
+    protected void AddCommandHandler(IUserCommandHandler userCommandHandler) => _userCommandHandlers.Add(userCommandHandler);
+
+    protected void AddCommandHandler(IEnumerable<IUserCommandHandler> commandHandlers)
+    {
+        foreach (var userCommandHandler in commandHandlers)
+        {
+            AddCommandHandler(userCommandHandler);
+        }
+    }
+}

src/AppCommon/FileTime.App.Core/Services/UserCommandHandler/CommandSchedulerUserCommandHandlerService.cs

@@ -10,7 +10,7 @@ public class CommandSchedulerUserCommandHandlerService : UserCommandHandlerServi
     public CommandSchedulerUserCommandHandlerService(ICommandScheduler commandScheduler)
     {
         _commandScheduler = commandScheduler;
-        AddCommandHandlers(new IUserCommandHandler[]
+        AddCommandHandler(new IUserCommandHandler[]
         {
             new TypeUserCommandHandler<PauseCommandSchedulerCommand>(PauseCommandScheduler),
             new TypeUserCommandHandler<StartCommandSchedulerCommand>(StartCommandScheduler),

src/AppCommon/FileTime.App.Core/Services/UserCommandHandler/IdentifiableUserCommandService.cs

@@ -12,8 +12,8 @@ public class IdentifiableUserCommandService : IIdentifiableUserCommandService
         IdentifiableUserCommands = _identifiableUserCommands.AsReadOnly();
     }
 
-    public void AddIdentifiableUserCommandFactory(string identifier, IIdentifiableUserCommand commandFactory)
+    public void AddIdentifiableUserCommand(IIdentifiableUserCommand command)
-        => _identifiableUserCommands.Add(identifier, commandFactory);
+        => _identifiableUserCommands.Add(command.UserCommandID, command);
 
     public IIdentifiableUserCommand? GetCommand(string identifier)
     {

src/AppCommon/FileTime.App.Core/Services/UserCommandHandler/ItemManipulationUserCommandHandlerService.cs

@@ -62,7 +62,7 @@ public class ItemManipulationUserCommandHandlerService : UserCommandHandlerServi
 
         _markedItems = appState.SelectedTab.Map(t => t?.MarkedItems).Switch();
 
-        AddCommandHandlers(new IUserCommandHandler[]
+        AddCommandHandler(new IUserCommandHandler[]
         {
             new TypeUserCommandHandler<CopyCommand>(CopyAsync),
             new TypeUserCommandHandler<DeleteCommand>(DeleteAsync),

src/AppCommon/FileTime.App.Core/Services/UserCommandHandler/NavigationUserCommandHandlerService.cs

@@ -59,7 +59,7 @@ public class NavigationUserCommandHandlerService : UserCommandHandlerServiceBase
 
         appState.ViewMode.Subscribe(v => _viewMode = v);
 
-        AddCommandHandlers(new IUserCommandHandler[]
+        AddCommandHandler(new IUserCommandHandler[]
         {
             new TypeUserCommandHandler<CloseTabCommand>(CloseTab),
             new TypeUserCommandHandler<EnterRapidTravelCommand>(EnterRapidTravel),

src/AppCommon/FileTime.App.Core/Services/UserCommandHandler/ToolUserCommandHandlerService.cs

@@ -45,7 +45,7 @@ public class ToolUserCommandHandlerService : UserCommandHandlerServiceBase
         SaveCurrentSelectedItem(i => _currentSelectedItem = i);
         SaveSelectedTab(t => _currentSelectedTab = t);
 
-        AddCommandHandlers(new IUserCommandHandler[]
+        AddCommandHandler(new IUserCommandHandler[]
         {
             new TypeUserCommandHandler<OpenInDefaultFileExplorerCommand>(OpenInDefaultFileExplorer),
             new TypeUserCommandHandler<CopyNativePathCommand>(CopyNativePath),

src/AppCommon/FileTime.App.Core/Services/UserCommandHandler/UserCommandHandler.cs

@@ -1,16 +0,0 @@
-namespace FileTime.App.Core.Services.UserCommandHandler;
-
-public sealed class UserCommandHandler : IUserCommandHandler
-{
-    private readonly Func<UserCommand.IUserCommand, bool> _canHandle;
-    private readonly Func<UserCommand.IUserCommand, Task> _handle;
-
-    public UserCommandHandler(Func<UserCommand.IUserCommand, bool> canHandle, Func<UserCommand.IUserCommand, Task> handle)
-    {
-        _canHandle = canHandle;
-        _handle = handle;
-    }
-
-    public bool CanHandleCommand(UserCommand.IUserCommand command) => _canHandle(command);
-    public async Task HandleCommandAsync(UserCommand.IUserCommand command) => await _handle(command);
-}

src/AppCommon/FileTime.App.Core/Services/UserCommandHandler/UserCommandHandlerServiceBase.cs

@@ -8,9 +8,8 @@ using FileTime.Core.Timeline;
 
 namespace FileTime.App.Core.Services.UserCommandHandler;
 
-public abstract class UserCommandHandlerServiceBase : IUserCommandHandler
+public abstract class UserCommandHandlerServiceBase : AggregatedUserCommandHandler
 {
-    private readonly List<IUserCommandHandler> _userCommandHandlers = new();
     private readonly IAppState? _appState;
     private readonly ITimelessContentProvider? _timelessContentProvider;
 
@@ -22,28 +21,6 @@ public abstract class UserCommandHandlerServiceBase : IUserCommandHandler
         _timelessContentProvider = timelessContentProvider;
     }
 
-    public bool CanHandleCommand(UserCommand.IUserCommand command) => _userCommandHandlers.Any(h => h.CanHandleCommand(command));
-
-    public async Task HandleCommandAsync(UserCommand.IUserCommand command)
-    {
-        var handler = _userCommandHandlers.Find(h => h.CanHandleCommand(command));
-
-        if (handler is null) return;
-        await handler.HandleCommandAsync(command);
-    }
-
-    protected void AddCommandHandler(IUserCommandHandler userCommandHandler) => _userCommandHandlers.Add(userCommandHandler);
-
-    protected void AddCommandHandlers(IEnumerable<IUserCommandHandler> commandHandlers)
-    {
-        foreach (var userCommandHandler in commandHandlers)
-        {
-            AddCommandHandler(userCommandHandler);
-        }
-    }
-
-    protected void RemoveCommandHandler(IUserCommandHandler userCommandHandler) => _userCommandHandlers.Remove(userCommandHandler);
-
     protected IDisposable SaveSelectedTab(Action<ITabViewModel?> handler) => RunWithAppState(appState => appState.SelectedTab.Subscribe(handler));
 
     protected IDisposable SaveCurrentSelectedItem(Action<IDeclarativeProperty<IItemViewModel?>?> handler)

src/AppCommon/FileTime.App.Core/StartupServices/DefaultIdentifiableCommandHandlerRegister.cs

@@ -69,5 +69,5 @@ public class DefaultIdentifiableCommandHandlerRegister : IStartupHandler
     public Task InitAsync() => Task.CompletedTask;
 
     private void AddUserCommand(IIdentifiableUserCommand command)
-        => _userCommandHandlerService.AddIdentifiableUserCommandFactory(command.UserCommandID, command);
+        => _userCommandHandlerService.AddIdentifiableUserCommand(command);
 }

src/Core/FileTime.Core.Abstraction/ContentAccess/IContentReader.cs

@@ -7,4 +7,5 @@ public interface IContentReader : IDisposable
 
     Task<byte[]> ReadBytesAsync(int bufferSize, int? offset = null);
     void SetPosition(long position);
+    Stream AsStream();
 }

src/Core/FileTime.Core.Abstraction/ContentAccess/IContentWriter.cs

@@ -6,4 +6,5 @@ public interface IContentWriter : IDisposable
 
     Task WriteBytesAsync(byte[] data, int? index = null, CancellationToken cancellationToken = default);
     Task FlushAsync(CancellationToken cancellationToken = default);
+    Stream AsStream();
 }

src/Core/FileTime.Core.Abstraction/Interactions/IOptionsInputElement.cs

@@ -3,5 +3,5 @@ namespace FileTime.Core.Interactions;
 public interface IOptionsInputElement : IInputElement
 {
     object Value { get; set; }
-    IEnumerable<IOptionElement> Options { get; }
+    IReadOnlyCollection<IOptionElement> Options { get; }
 }

src/Core/FileTime.Core.Abstraction/Interactions/OptionsInputElement.cs

@@ -5,19 +5,30 @@ namespace FileTime.Core.Interactions;
 
 public partial class OptionsInputElement<T> : InputElementBase, IOptionsInputElement, INotifyPropertyChanged
 {
-    public IEnumerable<OptionElement<T>> Options { get; }
+    public IReadOnlyCollection<OptionElement<T>> Options { get; }
 
     [Notify] private T? _value;
 
-    IEnumerable<IOptionElement> IOptionsInputElement.Options => Options;
+    IReadOnlyCollection<IOptionElement> IOptionsInputElement.Options => Options;
+
     object? IOptionsInputElement.Value
     {
-        get => Value;
+        get => Options.FirstOrDefault(o => o.Value?.Equals(_value) ?? false);
-        set => Value = (T?)value;
+        set
+        {
+            if (value is T newValue)
+            {
+                Value = newValue;
+            }
+            else if (value is OptionElement<T> optionElement)
+            {
+                Value = optionElement.Value;
+            }
+        }
     }
 
     public OptionsInputElement(string label, IEnumerable<OptionElement<T>> options) : base(label, InputType.Options)
     {
-        Options = options;
+        Options = options.ToList();
     }
 }

src/Core/FileTime.Core.Command/Copy/CopyCommand.cs

@@ -33,11 +33,15 @@ public class CopyCommand : CommandBase, ITransportationCommand
         ITimelessContentProvider timelessContentProvider,
         ICommandSchedulerNotifier commandSchedulerNotifier,
         ILogger<CopyCommand> logger,
-        IReadOnlyCollection<FullName>? sources,
+        IReadOnlyCollection<FullName> sources,
-        TransportMode? mode,
+        TransportMode mode,
-        FullName? targetFullName)
+        FullName targetFullName)
         : base("Copy - Calculating...")
     {
+        ArgumentNullException.ThrowIfNull(sources);
+        ArgumentNullException.ThrowIfNull(mode);
+        ArgumentNullException.ThrowIfNull(targetFullName);
+        
         _timelessContentProvider = timelessContentProvider;
         _commandSchedulerNotifier = commandSchedulerNotifier;
         _logger = logger;
@@ -54,12 +58,8 @@ public class CopyCommand : CommandBase, ITransportationCommand
             .Switch()
             .Subscribe(SetCurrentProgress);
 
-        if (sources is null) throw new ArgumentException(nameof(Sources) + " can not be null");
-        if (targetFullName is null) throw new ArgumentException(nameof(Target) + " can not be null");
-        if (mode is null) throw new ArgumentException(nameof(TransportMode) + " can not be null");
-
         Sources = new List<FullName>(sources).AsReadOnly();
-        TransportMode = mode.Value;
+        TransportMode = mode;
         Target = targetFullName;
 
         var recentSpeed = DeclarativePropertyHelpers.CombineLatest(

src/FileTime.sln

@@ -107,6 +107,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FileTime.Server.Common.Abst
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FileTime.Server.Web", "Server\FileTime.Server.Web\FileTime.Server.Web.csproj", "{9062F7D2-34DE-44B7-A2D6-8B3AFDEBB606}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FileTime.Tools.Compression", "Tools\FileTime.Tools.Compression\FileTime.Tools.Compression.csproj", "{58243F14-15A6-4601-A071-F99BE896D027}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FileTime.Tools.Compression.Core", "Tools\FileTime.Tools.Compression.Core\FileTime.Tools.Compression.Core.csproj", "{EE1721A0-D15A-4E40-BEA5-8AB6BAB8FD44}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -285,6 +289,14 @@ Global
 		{9062F7D2-34DE-44B7-A2D6-8B3AFDEBB606}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{9062F7D2-34DE-44B7-A2D6-8B3AFDEBB606}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{9062F7D2-34DE-44B7-A2D6-8B3AFDEBB606}.Release|Any CPU.Build.0 = Release|Any CPU
+		{58243F14-15A6-4601-A071-F99BE896D027}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{58243F14-15A6-4601-A071-F99BE896D027}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{58243F14-15A6-4601-A071-F99BE896D027}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{58243F14-15A6-4601-A071-F99BE896D027}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EE1721A0-D15A-4E40-BEA5-8AB6BAB8FD44}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EE1721A0-D15A-4E40-BEA5-8AB6BAB8FD44}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EE1721A0-D15A-4E40-BEA5-8AB6BAB8FD44}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EE1721A0-D15A-4E40-BEA5-8AB6BAB8FD44}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -334,6 +346,8 @@ Global
 		{181BC62C-EDEA-4DD1-8837-A4B1CBF8BE42} = {778AAF38-20FF-438C-A9C3-60850C8B5A27}
 		{C82B417F-94E6-4D4D-B261-0CAF40551D5E} = {778AAF38-20FF-438C-A9C3-60850C8B5A27}
 		{9062F7D2-34DE-44B7-A2D6-8B3AFDEBB606} = {778AAF38-20FF-438C-A9C3-60850C8B5A27}
+		{58243F14-15A6-4601-A071-F99BE896D027} = {8C3CFEFE-78A5-4940-B388-D15FCE02ECE9}
+		{EE1721A0-D15A-4E40-BEA5-8AB6BAB8FD44} = {8C3CFEFE-78A5-4940-B388-D15FCE02ECE9}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {859FB3DF-C60A-46B1-82E5-90274905D1EF}

src/GuiApp/Avalonia/FileTime.GuiApp.App/App.axaml.cs

@@ -9,6 +9,7 @@ using FileTime.GuiApp.Font;
 using FileTime.GuiApp.ViewModels;
 using FileTime.GuiApp.Views;
 using FileTime.Server.Common;
+using FileTime.Tools.Compression;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 
@@ -25,6 +26,7 @@ public class App : Application
             .AddFrequencyNavigation()
             .AddCommandPalette()
             .AddSearch()
+            .AddCompression()
             .AddConfiguration(configuration)
             .ConfigureFont(configuration)
             .RegisterLogging()

src/GuiApp/Avalonia/FileTime.GuiApp.App/FileTime.GuiApp.App.csproj

@@ -45,6 +45,7 @@
     <ProjectReference Include="..\..\..\AppCommon\FileTime.App.DependencyInjection\FileTime.App.DependencyInjection.csproj" />
     <ProjectReference Include="..\..\..\AppCommon\FileTime.App.FrequencyNavigation\FileTime.App.FrequencyNavigation.csproj" />
     <ProjectReference Include="..\..\..\AppCommon\FileTime.App.Search\FileTime.App.Search.csproj" />
+    <ProjectReference Include="..\..\..\Tools\FileTime.Tools.Compression\FileTime.Tools.Compression.csproj" />
     <ProjectReference Include="..\FileTime.GuiApp.CustomImpl\FileTime.GuiApp.CustomImpl.csproj" />
     <ProjectReference Include="..\FileTime.GuiApp.Font\FileTime.GuiApp.Font.csproj" />
     <ProjectReference Include="..\FileTime.GuiApp\FileTime.GuiApp.csproj" />

src/GuiApp/Avalonia/FileTime.GuiApp/Resources/Styles.axaml

@@ -1,4 +1,7 @@
-<Styles xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+<Styles
+    xmlns="https://github.com/avaloniaui"
+    xmlns:interactions="clr-namespace:FileTime.Core.Interactions;assembly=FileTime.Core.Abstraction"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <Styles.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
@@ -78,10 +81,11 @@
                 <ControlTemplate>
                     <Border>
                         <RadioButton
-                            Content="{TemplateBinding ContentPresenter.Content}"
                             Foreground="{DynamicResource ForegroundBrush}"
                             IsChecked="{Binding Path=IsSelected, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
-                            VerticalAlignment="Center" />
+                            VerticalAlignment="Center">
+                            <TextBlock Text="{Binding Text}" x:DataType="interactions:IOptionElement" />
+                        </RadioButton>
                     </Border>
                 </ControlTemplate>
             </Setter.Value>

src/Providers/FileTime.Providers.Local/LocalContentReader.cs

@@ -45,6 +45,8 @@ public class LocalContentReader : IContentReader
         Position = position;
     }
 
+    public Stream AsStream() => _binaryReader.BaseStream;
+
     ~LocalContentReader()
     {
         Dispose(false);

src/Providers/FileTime.Providers.Local/LocalContentWriter.cs

@@ -34,6 +34,8 @@ public class LocalContentWriter : IContentWriter
         return Task.CompletedTask;
     }
 
+    public Stream AsStream() => _binaryWriter.BaseStream;
+
     ~LocalContentWriter()
     {
         Dispose(false);

src/Providers/FileTime.Providers.Remote/RemoteContentWriter.cs

@@ -1,4 +1,5 @@
-using FileTime.Core.Models;
+using FileTime.Core.ContentAccess;
+using FileTime.Core.Models;
 using FileTime.Server.Common;
 
 namespace FileTime.Providers.Remote;
@@ -43,6 +44,8 @@ public class RemoteContentWriter : IRemoteContentWriter
         await _remoteConnection.FlushWriterAsync(_transactionId, cancellationToken);
     }
 
+    public Stream AsStream() => new ContentAccessStream(this);
+
     private async Task InitializeRemoteWriter(NativePath nativePath)
     {
         _isRemoteWriterInitialized = true;

src/Tools/FileTime.Tools.Compression.Core/CompressOperation.cs

@@ -0,0 +1,70 @@
+using FileTime.Core.ContentAccess;
+using FileTime.Core.Models;
+using SharpCompress.Archives;
+using SharpCompress.Common;
+
+namespace FileTime.Tools.Compression;
+
+public class CompressOperation<TEntry, TVolume> : ICompressOperation
+    where TEntry : IArchiveEntry
+    where TVolume : IVolume
+{
+    private readonly IContentAccessorFactory _contentAccessorFactory;
+    private readonly AbstractWritableArchive<TEntry, TVolume> _archive;
+    private readonly Action<Stream> _saveTo;
+    private bool _disposed;
+
+    public CompressOperation(
+        IContentAccessorFactory contentAccessorFactory,
+        AbstractWritableArchive<TEntry, TVolume> archive,
+        Action<Stream> saveTo
+    )
+    {
+        _contentAccessorFactory = contentAccessorFactory;
+        _archive = archive;
+        _saveTo = saveTo;
+    }
+
+    public async Task<IEnumerable<IDisposable>> CompressElement(IElement element, string key)
+    {
+        if (element.Provider.SupportsContentStreams)
+        {
+            var contentReader = await _contentAccessorFactory.GetContentReaderFactory(element.Provider).CreateContentReaderAsync(element);
+
+            var contentReaderStream = contentReader.AsStream();
+
+            _archive.AddEntry(key, contentReaderStream);
+
+            return new IDisposable[] {contentReader, contentReaderStream};
+        }
+
+        return Enumerable.Empty<IDisposable>();
+    }
+
+    public void SaveTo(Stream stream) 
+        => _saveTo(stream);
+
+    ~CompressOperation()
+    {
+        Dispose(false);
+    }
+
+    public void Dispose()
+    {
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
+
+    private void Dispose(bool disposing)
+    {
+        if (!_disposed)
+        {
+            if (disposing)
+            {
+                _archive.Dispose();
+            }
+        }
+
+        _disposed = true;
+    }
+}

src/Tools/FileTime.Tools.Compression.Core/FileTime.Tools.Compression.Core.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <RootNamespace>FileTime.Tools.Compression</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="SharpCompress" Version="0.33.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Core\FileTime.Core.Abstraction\FileTime.Core.Abstraction.csproj" />
+  </ItemGroup>
+
+</Project>

src/Tools/FileTime.Tools.Compression.Core/ICompressOperation.cs

@@ -0,0 +1,9 @@
+using FileTime.Core.Models;
+
+namespace FileTime.Tools.Compression;
+
+public interface ICompressOperation : IDisposable
+{
+    Task<IEnumerable<IDisposable>> CompressElement(IElement element, string key);
+    void SaveTo(Stream stream);
+}

src/Tools/FileTime.Tools.Compression/CompressCommand.cs

@@ -0,0 +1,164 @@
+using FileTime.Core.Command;
+using FileTime.Core.ContentAccess;
+using FileTime.Core.Enums;
+using FileTime.Core.Interactions;
+using FileTime.Core.Models;
+using FileTime.Core.Timeline;
+using FileTime.Tools.Extensions;
+using SharpCompress.Archives;
+using SharpCompress.Common;
+using SharpCompressCompressionType = SharpCompress.Common.CompressionType;
+
+namespace FileTime.Tools.Compression;
+
+public class CompressCommand : CommandBase, IExecutableCommand, ITransportationCommand, IRequireInputCommand
+{
+    private readonly IList<IInputElement> _inputs;
+    private readonly IUserCommunicationService _userCommunicationService;
+    private readonly ITimelessContentProvider _timelessContentProvider;
+    private readonly IContentAccessorFactory _contentAccessorFactory;
+    private readonly OptionsInputElement<CompressionType> _compressionType;
+    private readonly CancellationTokenSource _cancellationTokenSource = new();
+    private readonly TextInputElement _targetFileName;
+    public IReadOnlyList<FullName> Sources { get; }
+    public FullName Target { get; }
+    public TransportMode TransportMode { get; }
+
+
+    internal CompressCommand(
+        IUserCommunicationService userCommunicationService,
+        ITimelessContentProvider timelessContentProvider,
+        IContentAccessorFactory contentAccessorFactory,
+        IReadOnlyCollection<FullName> sources,
+        TransportMode mode,
+        FullName targetFullName)
+    {
+        _userCommunicationService = userCommunicationService;
+        _timelessContentProvider = timelessContentProvider;
+        _contentAccessorFactory = contentAccessorFactory;
+        ArgumentNullException.ThrowIfNull(sources);
+        ArgumentNullException.ThrowIfNull(mode);
+        ArgumentNullException.ThrowIfNull(targetFullName);
+
+        Sources = new List<FullName>(sources).AsReadOnly();
+        TransportMode = mode;
+        Target = targetFullName;
+
+        _targetFileName = new TextInputElement("File name");
+        _compressionType = new OptionsInputElement<CompressionType>(
+            "CompressionMethod",
+            Enum.GetValues<CompressionType>()
+                .Select(t => new OptionElement<CompressionType>(t.ToString(), t))
+        );
+
+        _inputs = new List<IInputElement>
+        {
+            _targetFileName,
+            _compressionType
+        };
+    }
+
+
+    public override Task<CanCommandRun> CanRun(PointInTime currentTime)
+    {
+        //TODO: 
+        return Task.FromResult(CanCommandRun.True);
+    }
+
+    public override Task<PointInTime> SimulateCommand(PointInTime currentTime)
+    {
+        var differences = new List<Difference>
+        {
+            new(DifferenceActionType.Create, new AbsolutePath(_timelessContentProvider, currentTime, Target, AbsolutePathType.Element))
+        };
+        return Task.FromResult(currentTime.WithDifferences(differences));
+    }
+
+    public override void Cancel()
+        => _cancellationTokenSource.Cancel();
+
+    public async Task Execute()
+    {
+        var disposables = Enumerable.Empty<IDisposable>();
+
+        ICompressOperation? compressOperation = null;
+        try
+        {
+            var compressionType = _compressionType.Value;
+
+            compressOperation = compressionType switch
+            {
+                CompressionType.Gzip => SharpCompress.Archives.GZip.GZipArchive.Create().Map(a => GetCompressOperation(a, (s) => a.SaveTo(s, new SharpCompress.Writers.WriterOptions(SharpCompressCompressionType.GZip)))),
+                CompressionType.Zip => SharpCompress.Archives.Zip.ZipArchive.Create().Map(a => GetCompressOperation(a, a.SaveTo)),
+                CompressionType.Tar => SharpCompress.Archives.Tar.TarArchive.Create().Map(a => GetCompressOperation(a, (s) => a.SaveTo(s, new SharpCompress.Writers.WriterOptions(SharpCompressCompressionType.None)))),
+                CompressionType.TarBz2 => SharpCompress.Archives.Tar.TarArchive.Create().Map(a => GetCompressOperation(a, (s) => a.SaveTo(s, new SharpCompress.Writers.WriterOptions(SharpCompressCompressionType.BZip2)))),
+                CompressionType.TarLz => SharpCompress.Archives.Tar.TarArchive.Create().Map(a => GetCompressOperation(a, (s) => a.SaveTo(s, new SharpCompress.Writers.WriterOptions(SharpCompressCompressionType.LZip)))),
+                _ => throw new NotImplementedException()
+            };
+
+            disposables = await TraverseTree(Sources, "", compressOperation);
+
+            var resolvedParent = await _timelessContentProvider.GetItemByFullNameAsync(
+                Target,
+                PointInTime.Present
+            );
+
+            var newItemName = Target.GetChild(_targetFileName.Value!);
+            await _contentAccessorFactory.GetItemCreator(resolvedParent.Provider).CreateElementAsync(resolvedParent.Provider, newItemName);
+            var targetElement = (IElement) await _timelessContentProvider.GetItemByFullNameAsync(newItemName, PointInTime.Present);
+            using var contentWriter = await _contentAccessorFactory.GetContentWriterFactory(resolvedParent.Provider).CreateContentWriterAsync(targetElement);
+            await using var contentWriterStream = contentWriter.AsStream();
+            compressOperation.SaveTo(contentWriterStream);
+
+            await contentWriterStream.FlushAsync(_cancellationTokenSource.Token);
+        }
+        finally
+        {
+            compressOperation?.Dispose();
+
+            foreach (var disposable in disposables)
+            {
+                disposable.Dispose();
+            }
+        }
+    }
+
+    private async Task<IEnumerable<IDisposable>> TraverseTree(
+        IEnumerable<FullName> sources,
+        string basePath,
+        ICompressOperation operations,
+        CancellationToken cancellationToken = default)
+    {
+        var disposables = Enumerable.Empty<IDisposable>();
+        foreach (var source in sources)
+        {
+            var item = await _timelessContentProvider.GetItemByFullNameAsync(
+                source,
+                PointInTime.Present
+            );
+
+            if (item is IContainer container)
+            {
+                var items = container.Items;
+
+                var childItems = items.Select(i => i.Path).ToList();
+                var path = string.IsNullOrEmpty(basePath) ? container.Name : basePath + "\\" + container.Name;
+                disposables = disposables.Concat(await TraverseTree(childItems, path, operations, cancellationToken));
+            }
+            else if (item is IElement element)
+            {
+                var path = string.IsNullOrEmpty(basePath) ? element.Name : basePath + "\\" + element.Name;
+                disposables = disposables.Concat(await operations.CompressElement(element, path));
+            }
+        }
+
+        return disposables;
+    }
+
+    private CompressOperation<TEntry, TVolume> GetCompressOperation<TEntry, TVolume>(AbstractWritableArchive<TEntry, TVolume> archive, Action<Stream> saveTo)
+        where TEntry : IArchiveEntry where TVolume : IVolume
+        => new(_contentAccessorFactory, archive, saveTo);
+
+    public async Task ReadInputs()
+        => await _userCommunicationService.ReadInputs(_inputs);
+}

src/Tools/FileTime.Tools.Compression/CompressCommandFactory.cs

@@ -0,0 +1,34 @@
+using FileTime.Core.Command;
+using FileTime.Core.ContentAccess;
+using FileTime.Core.Interactions;
+using FileTime.Core.Models;
+using FileTime.Core.Timeline;
+
+namespace FileTime.Tools.Compression;
+
+public class CompressCommandFactory : ITransportationCommandFactory<CompressCommand>
+{
+    private readonly IUserCommunicationService _userCommunicationService;
+    private readonly ITimelessContentProvider _timelessContentProvider;
+    private readonly IContentAccessorFactory _contentAccessorFactory;
+
+    public CompressCommandFactory(
+        IUserCommunicationService userCommunicationService,
+        ITimelessContentProvider timelessContentProvider,
+        IContentAccessorFactory contentAccessorFactory)
+    {
+        _userCommunicationService = userCommunicationService;
+        _timelessContentProvider = timelessContentProvider;
+        _contentAccessorFactory = contentAccessorFactory;
+    }
+
+    public CompressCommand GenerateCommand(IReadOnlyCollection<FullName> sources, TransportMode mode, FullName targetFullName)
+        => new(
+            _userCommunicationService,
+            _timelessContentProvider,
+            _contentAccessorFactory,
+            sources,
+            mode,
+            targetFullName
+        );
+}

src/Tools/FileTime.Tools.Compression/CompressUserCommand.cs

@@ -0,0 +1,15 @@
+using FileTime.App.Core.UserCommand;
+
+namespace FileTime.Tools.Compression;
+
+public class CompressUserCommand : IIdentifiableUserCommand
+{
+    public const string CommandName = "compress";
+    public static readonly CompressUserCommand Instance = new();
+    private CompressUserCommand()
+    {
+    }
+
+    public string UserCommandID => CommandName;
+    public string Title => "Compress";
+}

src/Tools/FileTime.Tools.Compression/CompressionType.cs

@@ -0,0 +1,10 @@
+namespace FileTime.Tools.Compression;
+
+public enum CompressionType
+{
+    Gzip,
+    Zip,
+    Tar,
+    TarBz2,
+    TarLz
+}

src/Tools/FileTime.Tools.Compression/CompressionUserCommandHandler.cs

@@ -0,0 +1,49 @@
+using System.Collections.ObjectModel;
+using DeclarativeProperty;
+using FileTime.App.Core.Services;
+using FileTime.App.Core.Services.UserCommandHandler;
+using FileTime.App.Core.ViewModels;
+using FileTime.Core.Models;
+
+namespace FileTime.Tools.Compression;
+
+public class CompressionUserCommandHandler : AggregatedUserCommandHandler
+{
+    private readonly IClipboardService _clipboardService;
+    private readonly IDeclarativeProperty<ObservableCollection<FullName>?> _markedItems;
+    private readonly IDeclarativeProperty<IItemViewModel?> _selectedItem;
+
+    public CompressionUserCommandHandler(
+        IAppState appState,
+        IClipboardService clipboardService)
+    {
+        _clipboardService = clipboardService;
+        _markedItems = appState.SelectedTab.Map(t => t.MarkedItems).Switch();
+        _selectedItem = appState.SelectedTab.Map(t => t.CurrentSelectedItem).Switch();
+
+        AddCommandHandler(new[]
+        {
+            new TypeUserCommandHandler<CompressUserCommand>(Compress)
+        });
+    }
+
+    private Task Compress()
+    {
+        _clipboardService.Clear();
+        _clipboardService.SetCommand<CompressCommandFactory>();
+
+        if (_markedItems.Value is {Count: > 0} markedItems)
+        {
+            foreach (var markedItem in markedItems)
+            {
+                _clipboardService.AddContent(markedItem);
+            }
+        }
+        else if (_selectedItem.Value?.BaseItem?.FullName is { } fullname)
+        {
+            _clipboardService.AddContent(fullname);
+        }
+
+        return Task.CompletedTask;
+    }
+}

src/Tools/FileTime.Tools.Compression/FileTime.Tools.Compression.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\AppCommon\FileTime.App.Core.Abstraction\FileTime.App.Core.Abstraction.csproj" />
+    <ProjectReference Include="..\..\Core\FileTime.Core.Command\FileTime.Core.Command.csproj" />
+    <ProjectReference Include="..\FileTime.Tools.Compression.Core\FileTime.Tools.Compression.Core.csproj" />
+    <ProjectReference Include="..\FileTime.Tools\FileTime.Tools.csproj" />
+  </ItemGroup>
+
+</Project>

src/Tools/FileTime.Tools.Compression/Startup.cs

@@ -0,0 +1,24 @@
+using FileTime.App.Core.Services;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace FileTime.Tools.Compression;
+
+public class StartupHandler : IStartupHandler
+{
+    public StartupHandler(IIdentifiableUserCommandService identifiableUserCommandService)
+    {
+        identifiableUserCommandService.AddIdentifiableUserCommand(CompressUserCommand.Instance);
+    }
+    public Task InitAsync() => Task.CompletedTask;
+}
+
+public static class Startup
+{
+    public static IServiceCollection AddCompression(this IServiceCollection services)
+    {
+        services.AddSingleton<IStartupHandler, StartupHandler>();
+        services.AddSingleton<CompressCommandFactory>();
+        services.AddSingleton<IUserCommandHandler, CompressionUserCommandHandler>();
+        return services;
+    }
+}

src/Tools/FileTime.Tools/Extensions/ObjectExtensions.cs

@@ -2,6 +2,8 @@ namespace FileTime.Tools.Extensions;
 
 public static class ObjectExtensions
 {
+    public static TResult Map<T, TResult>(this T obj, Func<T, TResult> mapper)
+        => mapper(obj);
     public static TResult? MapNull<T, TResult>(this T obj, Func<TResult?> nullHandler, Func<T, TResult?> valueHandler)
         => obj == null ? nullHandler() : valueHandler(obj);