CopyCommand WIP

src/Core/FileTime.Core.Abstraction/Models/AbsolutePath.cs

@@ -50,4 +50,7 @@ public class AbsolutePath
             return null;
         }
     }
+
+    public AbsolutePath GetChild(string childName, AbsolutePathType type)
+        => new (TimelessProvider, PointInTime, Path.GetChild(childName), type);
 }

src/Core/FileTime.Core.Abstraction/Models/Extensions/FileExtension.cs

@@ -0,0 +1,3 @@
+namespace FileTime.Core.Models.Extensions;
+
+public record FileExtension(long? Size);

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

@@ -0,0 +1,27 @@
+using FileTime.Core.Models;
+using FileTime.Core.Models.Extensions;
+using FileTime.Core.Timeline;
+
+namespace FileTime.Core.Command.Copy;
+
+public class CalculateStrategy : ICopyStrategy
+{
+    private readonly List<OperationProgress> _operationStatuses;
+    public IReadOnlyList<OperationProgress> OperationStatuses { get; }
+
+    public CalculateStrategy()
+    {
+        _operationStatuses = new();
+        OperationStatuses = _operationStatuses.AsReadOnly();
+    }
+
+    public Task ContainerCopyDoneAsync(AbsolutePath path) => Task.CompletedTask;
+
+    public async Task CopyAsync(AbsolutePath from, AbsolutePath to, CopyCommandContext context)
+    {
+        var resolvedFrom = await from.ResolveAsync();
+        _operationStatuses.Add(new OperationProgress(from.Path.Path, (resolvedFrom as IElement)?.GetExtension<FileExtension>()?.Size ?? 0L));
+    }
+
+    public Task CreateContainerAsync(IContainer target, string name, PointInTime currentTime) => Task.CompletedTask;
+}

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

@@ -1,16 +1,140 @@
+using FileTime.Core.Enums;
+using FileTime.Core.Extensions;
+using FileTime.Core.Models;
 using FileTime.Core.Timeline;
 
 namespace FileTime.Core.Command.Copy;
 
 public class CopyCommand : ITransportationCommand
 {
-    public Task<CanCommandRun> CanRun(PointInTime currentTime)
+    private readonly ITimelessContentProvider _timelessContentProvider;
+
+    private readonly List<OperationProgress> _operationProgresses = new();
+
+    public IList<FullName> Sources { get; } = new List<FullName>();
+
+    public FullName? Target { get; set; }
+
+    public TransportMode? TransportMode { get; set; } = Command.TransportMode.Merge;
+    public OperationProgress? CurrentOperationProgress { get; private set; }
+
+    public CopyCommand(ITimelessContentProvider timelessContentProvider)
     {
-        throw new NotImplementedException();
+        _timelessContentProvider = timelessContentProvider;
     }
 
-    public Task<PointInTime> SimulateCommand(PointInTime currentTime)
+    public Task<CanCommandRun> CanRun(PointInTime currentTime)
     {
-        throw new NotImplementedException();
+        //TODO: 
+        return Task.FromResult(CanCommandRun.True);
+    }
+
+    public async Task<PointInTime> SimulateCommand(PointInTime currentTime)
+    {
+        if (Sources == null) throw new ArgumentException(nameof(Sources) + " can not be null");
+        if (Target == null) throw new ArgumentException(nameof(Target) + " can not be null");
+        if (TransportMode == null) throw new ArgumentException(nameof(TransportMode) + " can not be null");
+
+        var simulateOperation = new SimulateStrategy(_timelessContentProvider);
+        var resolvedTarget = await _timelessContentProvider.GetItemByFullNameAsync(Target, currentTime);
+
+        await TraverseTree(
+            currentTime,
+            Sources,
+            new AbsolutePath(_timelessContentProvider, resolvedTarget),
+            TransportMode.Value,
+            simulateOperation);
+
+        return currentTime.WithDifferences(simulateOperation.NewDiffs);
+    }
+
+    public async Task ExecuteAsync(CopyFunc copy)
+    {
+        if (Sources == null) throw new ArgumentException(nameof(Sources) + " can not be null");
+        if (Target == null) throw new ArgumentException(nameof(Target) + " can not be null");
+        if (TransportMode == null) throw new ArgumentException(nameof(TransportMode) + " can not be null");
+
+        var currentTime = PointInTime.Present;
+
+        await CalculateProgressAsync(currentTime);
+
+        var copyOperation = new CopyStrategy(copy, new CopyStrategyParam(_operationProgresses));
+
+        var resolvedTarget = await _timelessContentProvider.GetItemByFullNameAsync(Target, currentTime);
+
+        await TraverseTree(
+            currentTime,
+            Sources,
+            new AbsolutePath(_timelessContentProvider, resolvedTarget),
+            TransportMode.Value,
+            copyOperation);
+        //await TimeRunner.RefreshContainer.InvokeAsync(this, Target);
+    }
+
+    private async Task CalculateProgressAsync(PointInTime currentTime)
+    {
+        if (Sources == null) throw new ArgumentException(nameof(Sources) + " can not be null");
+        if (Target == null) throw new ArgumentException(nameof(Target) + " can not be null");
+        if (TransportMode == null) throw new ArgumentException(nameof(TransportMode) + " can not be null");
+
+        var calculateOperation = new CalculateStrategy();
+        var resolvedTarget = await _timelessContentProvider.GetItemByFullNameAsync(Target, currentTime);
+
+        await TraverseTree(
+            currentTime,
+            Sources,
+            new AbsolutePath(_timelessContentProvider, resolvedTarget),
+            TransportMode.Value,
+            calculateOperation);
+
+        _operationProgresses.Clear();
+        _operationProgresses.AddRange(calculateOperation.OperationStatuses);
+    }
+
+    private async Task TraverseTree(
+        PointInTime curretnTime,
+        IEnumerable<FullName> sources,
+        AbsolutePath target,
+        TransportMode transportMode,
+        ICopyStrategy copyOperation)
+    {
+        var resolvedTarget = ((IContainer)await target.ResolveAsync()) ?? throw new Exception();
+
+        foreach (var source in sources)
+        {
+            var item = await _timelessContentProvider.GetItemByFullNameAsync(source, curretnTime);
+
+            if (item is IContainer container)
+            {
+                if (!((await resolvedTarget.Items.GetItemsAsync())?.Any(i => i.Path.GetName() == item.Name) ?? false))
+                {
+                    await copyOperation.CreateContainerAsync(resolvedTarget, container.Name, container.PointInTime);
+                }
+
+                var children = await container.Items.GetItemsAsync();
+                if (children is null) continue;
+
+                await TraverseTree(curretnTime, children.Select(c => c.Path).ToList(), target.GetChild(item.Name, AbsolutePathType.Container), transportMode, copyOperation);
+                await copyOperation.ContainerCopyDoneAsync(new AbsolutePath(_timelessContentProvider, container));
+            }
+            else if (item is IElement element)
+            {
+                var newElementName = await Helper.GetNewNameAsync(resolvedTarget, element.Name, transportMode);
+                if (newElementName == null) continue;
+
+                var newElementPath = target.GetChild(newElementName, AbsolutePathType.Element);
+
+                var currentProgress = _operationProgresses.Find(o => o.Key == element.FullName!.Path);
+                CurrentOperationProgress = currentProgress;
+
+                await copyOperation.CopyAsync(new AbsolutePath(_timelessContentProvider, element), newElementPath, new CopyCommandContext(UpdateProgress, currentProgress));
+            }
+        }
+    }
+
+    private Task UpdateProgress()
+    {
+        //TODO
+        return Task.CompletedTask;
     }
 }

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

@@ -0,0 +1,16 @@
+namespace FileTime.Core.Command.Copy;
+
+public class CopyCommandContext
+{
+    private readonly Func<Task> _updateProgress;
+
+    public CopyCommandContext(Func<Task> updateProgress, OperationProgress? currentProgress)
+    {
+        _updateProgress = updateProgress;
+        CurrentProgress = currentProgress;
+    }
+
+    public OperationProgress? CurrentProgress { get; }
+
+    public async Task UpdateProgress() => await _updateProgress.Invoke();
+}

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

@@ -0,0 +1,5 @@
+using FileTime.Core.Models;
+
+namespace FileTime.Core.Command.Copy;
+
+public delegate Task CopyFunc(AbsolutePath from, AbsolutePath to, CopyCommandContext context);

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

@@ -0,0 +1,37 @@
+using FileTime.Core.Models;
+using FileTime.Core.Timeline;
+
+namespace FileTime.Core.Command.Copy;
+
+public class CopyStrategy : ICopyStrategy
+{
+    private readonly CopyFunc _copy;
+    private readonly CopyStrategyParam _copyStrategyParam;
+
+    public CopyStrategy(CopyFunc copy, CopyStrategyParam copyStrategyParam)
+    {
+        _copy = copy;
+        _copyStrategyParam = copyStrategyParam;
+    }
+
+    public async Task ContainerCopyDoneAsync(AbsolutePath containerPath)
+    {
+        foreach (var item in _copyStrategyParam.OperationProgresses.FindAll(o => o.Key.StartsWith(containerPath.Path.Path)))
+        {
+            item.SetProgress(item.TotalCount);
+        }
+
+        await _copyStrategyParam.RefreshContainerAsync(containerPath.Path);
+    }
+
+    public async Task CopyAsync(AbsolutePath from, AbsolutePath to, CopyCommandContext context)
+    {
+        await _copy(from, to, context);
+        context.CurrentProgress?.SetProgress(context.CurrentProgress.TotalCount);
+    }
+
+    public Task CreateContainerAsync(IContainer target, string name, PointInTime currentTime)
+    {
+        throw new NotImplementedException();
+    }
+}

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

@@ -0,0 +1,17 @@
+using FileTime.Core.Models;
+
+namespace FileTime.Core.Command.Copy;
+
+public class CopyStrategyParam
+{
+    private readonly Func<FullName, Task> _refreshContainer;
+    public List<OperationProgress> OperationProgresses { get; }
+
+    public CopyStrategyParam(List<OperationProgress> operationProgresses, Func<FullName, Task> refreshContainer)
+    {
+        OperationProgresses = operationProgresses;
+        _refreshContainer = refreshContainer;
+    }
+
+    public async Task RefreshContainerAsync(FullName containerName) => await _refreshContainer(containerName);
+}

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

@@ -0,0 +1,11 @@
+using FileTime.Core.Models;
+using FileTime.Core.Timeline;
+
+namespace FileTime.Core.Command.Copy;
+
+public interface ICopyStrategy
+{
+    Task CreateContainerAsync(IContainer target, string name, PointInTime currentTime);
+    Task ContainerCopyDoneAsync(AbsolutePath containerPath);
+    Task CopyAsync(AbsolutePath from, AbsolutePath to, CopyCommandContext context);
+}

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

@@ -0,0 +1,39 @@
+using FileTime.Core.Models;
+using FileTime.Core.Timeline;
+
+namespace FileTime.Core.Command.Copy;
+
+public class SimulateStrategy : ICopyStrategy
+{
+    private readonly List<Difference> _newDiffs;
+    private readonly ITimelessContentProvider _timelessContentProvider;
+
+    public IReadOnlyList<Difference> NewDiffs { get; }
+
+    public SimulateStrategy(ITimelessContentProvider timelessContentProvider)
+    {
+        _timelessContentProvider = timelessContentProvider;
+        _newDiffs = new();
+        NewDiffs = _newDiffs.AsReadOnly();
+    }
+
+    public Task CreateContainerAsync(IContainer target, string name, PointInTime currentTime)
+    {
+        var newContainerDiff = new Difference(
+            DifferenceActionType.Create,
+            new AbsolutePath(_timelessContentProvider, currentTime, target.FullName!.GetChild(name), Enums.AbsolutePathType.Container)
+        );
+
+        _newDiffs.Add(newContainerDiff);
+
+        return Task.FromResult((IContainer)null!);
+    }
+
+    public Task ContainerCopyDoneAsync(AbsolutePath path) => Task.CompletedTask;
+
+    public Task CopyAsync(AbsolutePath from, AbsolutePath to, CopyCommandContext context)
+    {
+        _newDiffs.Add(new Difference(DifferenceActionType.Create, to));
+        return Task.CompletedTask;
+    }
+}

src/Core/FileTime.Core.Command/Helper.cs

@@ -0,0 +1,28 @@
+using FileTime.Core.Extensions;
+using FileTime.Core.Models;
+
+namespace FileTime.Core.Command;
+
+public static class Helper
+{
+    public static async Task<string?> GetNewNameAsync(IContainer resolvedTarget, string name, TransportMode transportMode)
+    {
+        var items = await resolvedTarget.Items.GetItemsAsync() ?? throw new NullReferenceException();
+        var newName = name;
+        var targetNameExists = resolvedTarget != null && items.Any(i => i.Path.GetName() == newName);
+        if (transportMode == TransportMode.Merge && resolvedTarget != null)
+        {
+            for (var i = 0; targetNameExists; i++)
+            {
+                newName = name + (i == 0 ? "_" : $"_{i}");
+                targetNameExists = resolvedTarget != null && items.Any(i => i.Path.GetName() == newName);
+            }
+        }
+        else if (transportMode == TransportMode.Skip && targetNameExists)
+        {
+            return null;
+        }
+
+        return newName;
+    }
+}

src/Core/FileTime.Core.Command/OperationProgress.cs

@@ -0,0 +1,24 @@
+using System.Reactive.Linq;
+using System.Reactive.Subjects;
+
+namespace FileTime.Core.Command;
+
+public class OperationProgress
+{
+    private readonly BehaviorSubject<long> _currentProgress = new(0);
+    public string Key { get; }
+    public IObservable<long> Progress { get; }
+    public long TotalCount { get; }
+    public IObservable<bool> IsDone { get; }
+
+    public OperationProgress(string key, long totalCount)
+    {
+        Key = key;
+        TotalCount = totalCount;
+
+        Progress = _currentProgress.AsObservable();
+        IsDone = Progress.Select(p => p >= TotalCount);
+    }
+
+    public void SetProgress(long progress) => _currentProgress.OnNext(progress);
+}