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refactor: create DemonstrateVFS.cs command
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‎Atypical.VirtualFileSystem.DemoCli/Atypical.VirtualFileSystem.DemoCli.csproj‎

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<ItemGroup>
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<PackageReference Include="Spectre.Console" Version="0.48.0" />
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<PackageReference Include="Spectre.Console.Cli" Version="0.48.0" />
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</ItemGroup>
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<ItemGroup>

‎Atypical.VirtualFileSystem.DemoCli/Commands/DemonstrateVFS.cs‎

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using Spectre.Console.Cli;
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namespace Atypical.VirtualFileSystem.DemoCli.Commands;
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public class DemonstrateVFS : Command
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{
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public override int Execute(CommandContext context)
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{
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// Create a virtual file system
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var factory = new VirtualFileSystemFactory();
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var vfs = factory.CreateFileSystem();
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// Subscribe to VFS events
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SubscribeToWriteVFSEvents(vfs, OnChange);
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// Display a banner
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AnsiConsole.Write(
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new FigletText("VFS Demo")
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.LeftJustified()
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.Color(Color.Gold1));
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// Create a directory structure
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ProcessStep(vfs, "CREATE A FILE STRUCTURE", () =>
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{
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vfs.CreateDirectory(new VFSDirectoryPath("/heroes"));
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vfs.CreateFile(new VFSFilePath("/heroes/ironman.txt"), "Tony Stark");
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vfs.CreateFile(new VFSFilePath("/heroes/captain_america.txt"), "Steve Rogers");
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vfs.CreateFile(new VFSFilePath("/heroes/hulk.txt"), "Bruce Banner");
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vfs.CreateFile(new VFSFilePath("/heroes/thor.txt"), "Thor Odinson");
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vfs.CreateFile(new VFSFilePath("/heroes/black_widow.txt"), "Natasha Romanoff");
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vfs.CreateDirectory(new VFSDirectoryPath("/villains"));
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vfs.CreateFile(new VFSFilePath("/villains/loki.txt"), "Loki Laufeyson");
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vfs.CreateFile(new VFSFilePath("/villains/ultron.txt"), "Ultron");
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vfs.CreateFile(new VFSFilePath("/villains/thanos.txt"), "Thanos");
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});
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// Rename a file
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ProcessStep(vfs, "RENAME A FILE",
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() => vfs.RenameFile(new VFSFilePath("/heroes/ironman.txt"), "tommy_stark.txt"));
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// UNDO
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ProcessStep(vfs, "UNDO", () => vfs.ChangeHistory.Undo());
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// REDO
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ProcessStep(vfs, "REDO", () => vfs.ChangeHistory.Redo());
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// Move a file
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ProcessStep(vfs, "MOVE A FILE",
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() => vfs.MoveFile(new VFSFilePath("/heroes/tony_stark.txt"), new VFSFilePath("/villains/tony_stark.txt")));
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// Delete a file
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ProcessStep(vfs, "DELETE A FILE",
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() => vfs.DeleteFile(new VFSFilePath("/villains/tony_stark.txt")));
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// Delete a directory
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ProcessStep(vfs, "DELETE DIRECTORY",
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() => vfs.DeleteDirectory(new VFSDirectoryPath("/villains")));
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// Move a directory
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ProcessStep(vfs, "MOVE DIRECTORY",
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() => vfs.MoveDirectory(new VFSDirectoryPath("/heroes"), new VFSDirectoryPath("/avengers")));
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// Rename a directory
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// TODO: fix rename directory
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// ProcessStep(vfs, "RENAME DIRECTORY",
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// () => vfs.RenameDirectory(new VFSDirectoryPath("/avengers"), new VFSDirectoryPath("/heroes")));
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return 0;
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}
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private static void SubscribeToWriteVFSEvents(
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IVirtualFileSystem virtualFileSystem,
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Action<VFSEventArgs> action)
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{
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virtualFileSystem.DirectoryCreated += action;
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virtualFileSystem.FileCreated += action;
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virtualFileSystem.DirectoryDeleted += action;
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virtualFileSystem.FileDeleted += action;
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virtualFileSystem.DirectoryMoved += action;
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virtualFileSystem.FileMoved += action;
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virtualFileSystem.DirectoryRenamed += action;
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virtualFileSystem.FileRenamed += action;
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}
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private static void OnChange(VFSEventArgs args)
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{
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AnsiConsole.Write(new Markup($" - {args.MessageWithMarkup}"));
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AnsiConsole.WriteLine();
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}
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private static void ProcessStep(IVirtualFileSystem virtualFileSystem, string sectionHeader, Action action)
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{
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WriteSectionHeader(sectionHeader);
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action();
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WriteTree(virtualFileSystem);
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}
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private static void WriteSectionHeader(string header = "")
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{
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AnsiConsole.Write(new Markup($"[underline yellow]{header}[/]"));
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AnsiConsole.WriteLine();
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AnsiConsole.WriteLine();
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}
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private static void WriteTree(IVirtualFileSystem virtualFileSystem)
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{
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AnsiConsole.WriteLine();
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AnsiConsole.Write(new Tree("Marvel Universe").FillTree(virtualFileSystem));
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AnsiConsole.WriteLine();
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}
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}

‎Atypical.VirtualFileSystem.DemoCli/Extensions/TreeExtensions.cs‎

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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree.
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using Atypical.VirtualFileSystem.Core.Contracts;
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using Spectre.Console.Rendering;
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namespace Atypical.VirtualFileSystem.DemoCli.Extensions;

‎Atypical.VirtualFileSystem.DemoCli/GlobalUsings.cs‎

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// Global using directives
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global using Atypical.VirtualFileSystem.Core;
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global using Atypical.VirtualFileSystem.Core.Contracts;
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global using Atypical.VirtualFileSystem.DemoCli.Extensions;
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global using Spectre.Console;

‎Atypical.VirtualFileSystem.DemoCli/Program.cs‎

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using Atypical.VirtualFileSystem.Core;
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using Atypical.VirtualFileSystem.Core.Contracts;
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using Atypical.VirtualFileSystem.DemoCli.Extensions;
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using Atypical.VirtualFileSystem.DemoCli.WIP;
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using Atypical.VirtualFileSystem.DemoCli.Commands;
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using Spectre.Console.Cli;
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// Create a virtual file system
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var factory = new VirtualFileSystemFactory();
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var vfs = factory.CreateFileSystem();
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var app = new CommandApp();
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// Add UNDO/REDO functionality
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var changeHistory = new ChangeHistory(vfs);
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// Subscribe to VFS events
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SubscribeToWriteVFSEvents(vfs);
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// Display a banner
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AnsiConsole.Write(
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new FigletText("VFS Demo")
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.LeftJustified()
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.Color(Color.Gold1));
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// Create a directory structure
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ProcessStep(vfs, "CREATE A FILE STRUCTURE", () =>
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app.Configure(config =>
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{
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vfs.CreateDirectory(new VFSDirectoryPath("/heroes"));
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vfs.CreateFile(new VFSFilePath("/heroes/ironman.txt"), "Tony Stark");
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vfs.CreateFile(new VFSFilePath("/heroes/captain_america.txt"), "Steve Rogers");
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vfs.CreateFile(new VFSFilePath("/heroes/hulk.txt"), "Bruce Banner");
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vfs.CreateFile(new VFSFilePath("/heroes/thor.txt"), "Thor Odinson");
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vfs.CreateFile(new VFSFilePath("/heroes/black_widow.txt"), "Natasha Romanoff");
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vfs.CreateDirectory(new VFSDirectoryPath("/villains"));
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vfs.CreateFile(new VFSFilePath("/villains/loki.txt"), "Loki Laufeyson");
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vfs.CreateFile(new VFSFilePath("/villains/ultron.txt"), "Ultron");
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vfs.CreateFile(new VFSFilePath("/villains/thanos.txt"), "Thanos");
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config.AddCommand<DemonstrateVFS>("demo");
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});
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// Rename a file
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ProcessStep(vfs, "RENAME A FILE",
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() => vfs.RenameFile(new VFSFilePath("/heroes/ironman.txt"), "tommy_stark.txt"));
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// UNDO
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ProcessStep(vfs, "UNDO", () => changeHistory.Undo());
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// REDO
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ProcessStep(vfs, "REDO", () => changeHistory.Redo());
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// Move a file
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ProcessStep(vfs, "MOVE A FILE",
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() => vfs.MoveFile(new VFSFilePath("/heroes/tony_stark.txt"), new VFSFilePath("/villains/tony_stark.txt")));
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// Delete a file
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ProcessStep(vfs, "DELETE A FILE",
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() => vfs.DeleteFile(new VFSFilePath("/villains/tony_stark.txt")));
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// Delete a directory
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ProcessStep(vfs, "DELETE DIRECTORY",
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() => vfs.DeleteDirectory(new VFSDirectoryPath("/villains")));
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// Move a directory
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ProcessStep(vfs, "MOVE DIRECTORY",
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() => vfs.MoveDirectory(new VFSDirectoryPath("/heroes"), new VFSDirectoryPath("/avengers")));
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// Rename a directory
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// TODO: fix rename directory
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// ProcessStep(vfs, "RENAME DIRECTORY",
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// () => vfs.RenameDirectory(new VFSDirectoryPath("/avengers"), new VFSDirectoryPath("/heroes")));
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return;
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void SubscribeToWriteVFSEvents(IVirtualFileSystem virtualFileSystem)
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{
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virtualFileSystem.DirectoryCreated += OnChange;
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virtualFileSystem.FileCreated += OnChange;
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virtualFileSystem.DirectoryDeleted += OnChange;
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virtualFileSystem.FileDeleted += OnChange;
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virtualFileSystem.DirectoryMoved += OnChange;
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virtualFileSystem.FileMoved += OnChange;
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virtualFileSystem.DirectoryRenamed += OnChange;
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virtualFileSystem.FileRenamed += OnChange;
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return;
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static void OnChange(VFSEventArgs args)
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{
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AnsiConsole.Write(new Markup($" - {args.MessageWithMarkup}"));
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AnsiConsole.WriteLine();
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}
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}
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void ProcessStep(IVirtualFileSystem virtualFileSystem, string sectionHeader, Action action)
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{
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WriteSectionHeader(sectionHeader);
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action();
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WriteTree(virtualFileSystem);
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}
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void WriteSectionHeader(string header = "")
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{
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AnsiConsole.Write(new Markup($"[underline yellow]{header}[/]"));
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AnsiConsole.WriteLine();
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AnsiConsole.WriteLine();
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}
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void WriteTree(IVirtualFileSystem virtualFileSystem)
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{
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AnsiConsole.WriteLine();
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AnsiConsole.Write(new Tree("Marvel Universe").FillTree(virtualFileSystem));
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AnsiConsole.WriteLine();
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}
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app.Run(args);

‎Atypical.VirtualFileSystem.DemoCli/WIP/FileSystemWatcher.cs‎

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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree.
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using Atypical.VirtualFileSystem.Core;
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using Atypical.VirtualFileSystem.Core.Contracts;
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namespace Atypical.VirtualFileSystem.DemoCli.WIP;
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public class FileSystemWatcher : IFileSystemWatcher

‎Atypical.VirtualFileSystem.DemoCli/WIP/IFileSystemWatcher.cs‎

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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree.
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using Atypical.VirtualFileSystem.Core;
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namespace Atypical.VirtualFileSystem.DemoCli.WIP;
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public interface IFileSystemWatcher

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