TimeTravel

2022-01-31 23:13:39 +01:00
parent 80570d8895
commit c2dcb49016
78 changed files with 2294 additions and 363 deletions
--- a/src/Core/FileTime.Core/Timeline/TimeContainer.cs
+++ b/src/Core/FileTime.Core/Timeline/TimeContainer.cs
@@ -0,0 +1,121 @@
+using AsyncEvent;
+using FileTime.Core.Models;
+using FileTime.Core.Providers;
+
+namespace FileTime.Core.Timeline
+{
+    public class TimeContainer : IContainer
+    {
+        private readonly IContainer? _parent;
+        private readonly PointInTime _pointInTime;
+
+        public bool IsLoaded => true;
+
+        public AsyncEventHandler Refreshed { get; } = new AsyncEventHandler();
+
+        public string Name { get; }
+
+        public string? FullName { get; }
+
+        public bool IsHidden => false;
+
+        public bool CanDelete => true;
+
+        public bool CanRename => true;
+
+        public IContentProvider Provider { get; }
+        public IContentProvider VirtualProvider { get; }
+
+        public TimeContainer(string name, IContainer parent, IContentProvider contentProvider, IContentProvider virtualContentProvider, PointInTime pointInTime)
+        {
+            _parent = parent;
+            _pointInTime = pointInTime;
+
+            Name = name;
+            Provider = contentProvider;
+            VirtualProvider = virtualContentProvider;
+            FullName = parent?.FullName == null ? Name : parent.FullName + Constants.SeparatorChar + Name;
+        }
+
+        public async Task<IContainer> Clone() => new TimeContainer(Name, await _parent!.Clone(), Provider, VirtualProvider, _pointInTime);
+
+        public Task<IContainer> CreateContainer(string name) => Task.FromResult((IContainer)new TimeContainer(name, this, Provider, VirtualProvider, _pointInTime));
+
+        public Task<IElement> CreateElement(string name) => Task.FromResult((IElement)new TimeElement(name, this, Provider, VirtualProvider));
+
+        public Task Delete() => Task.CompletedTask;
+
+        public async Task<IItem?> GetByPath(string path)
+        {
+            var paths = path.Split(Constants.SeparatorChar);
+
+            var item = (await GetItems())!.FirstOrDefault(i => i.Name == paths[0]);
+
+            if (paths.Length == 1)
+            {
+                return item;
+            }
+
+            if (item is IContainer container)
+            {
+                return await container.GetByPath(string.Join(Constants.SeparatorChar, paths.Skip(1)));
+            }
+
+            return null;
+        }
+
+        public Task<IReadOnlyList<IContainer>?> GetContainers(CancellationToken token = default) =>
+            Task.FromResult(
+                (IReadOnlyList<IContainer>?)_pointInTime
+                    .Differences
+                    .Where(d =>
+                        d.Type == DifferenceItemType.Container
+                        && GetParentPath(d.AbsolutePath.Path) == FullName)
+                    .Select(MapContainer)
+                    .ToList()
+                    .AsReadOnly()
+                );
+
+        public Task<IReadOnlyList<IElement>?> GetElements(CancellationToken token = default) =>
+            Task.FromResult(
+                (IReadOnlyList<IElement>?)_pointInTime
+                    .Differences
+                    .Where(d =>
+                        d.Type == DifferenceItemType.Element
+                        && GetParentPath(d.AbsolutePath.Path) == FullName)
+                    .Select(MapElement)
+                    .ToList()
+                    .AsReadOnly()
+                );
+
+        public async Task<IReadOnlyList<IItem>?> GetItems(CancellationToken token = default)
+        {
+            var containers = (await GetContainers(token))!;
+            var elements = (await GetElements(token))!;
+
+            return containers.Cast<IItem>().Concat(elements).ToList().AsReadOnly();
+        }
+
+        public IContainer? GetParent() => _parent;
+
+        public async Task<bool> IsExists(string name) => (await GetItems())?.Any(i => i.Name == name) ?? false;
+
+        public async Task Refresh() => await Refreshed.InvokeAsync(this, AsyncEventArgs.Empty);
+
+        public Task Rename(string newName) => Task.CompletedTask;
+
+        private static string GetParentPath(string path) => string.Join(Constants.SeparatorChar, path.Split(Constants.SeparatorChar).Take(-1));
+
+        private IContainer MapContainer(Difference containerDiff)
+        {
+            if (containerDiff.Type != DifferenceItemType.Container) throw new ArgumentException($"{nameof(containerDiff)}'s {nameof(Difference.Type)} property is not {DifferenceItemType.Container}.");
+            return new TimeContainer(containerDiff.Name, this, Provider, containerDiff.AbsolutePath.VirtualContentProvider ?? containerDiff.AbsolutePath.ContentProvider, _pointInTime);
+        }
+
+        private IElement MapElement(Difference elementDiff)
+        {
+            if (elementDiff.Type != DifferenceItemType.Container) throw new ArgumentException($"{elementDiff}'s {nameof(Difference.Type)} property is not {DifferenceItemType.Element}.");
+            return new TimeElement(elementDiff.Name, this, Provider, elementDiff.AbsolutePath.VirtualContentProvider ?? elementDiff.AbsolutePath.ContentProvider);
+        }
+    }
+}