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140 lines
4.7 KiB
140 lines
4.7 KiB
using System;
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using System.Collections.Generic;
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using System.IO;
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namespace IPA.Patcher
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{
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/// <summary>
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/// A unit for backup. WIP.
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/// </summary>
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public class BackupUnit
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{
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private string Name { get; }
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private readonly DirectoryInfo _backupPath;
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private readonly PatchContext _context;
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private readonly List<string> _files = new();
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private readonly FileInfo _manifestFile;
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private static readonly string _ManifestFileName = "$manifest$.txt";
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public BackupUnit(PatchContext context) : this(context, DateTime.Now.ToString("yyyy-MM-dd_h-mm-ss"))
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{
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}
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private BackupUnit(PatchContext context, string name)
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{
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Name = name;
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_context = context;
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_backupPath = new DirectoryInfo(Path.Combine(_context.BackupPath, Name));
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_manifestFile = new FileInfo(Path.Combine(_backupPath.FullName, _ManifestFileName));
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}
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public static BackupUnit FromDirectory(DirectoryInfo directory, PatchContext context)
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{
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var unit = new BackupUnit(context, directory.Name);
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// Read Manifest
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if (unit._manifestFile.Exists)
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{
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var manifest = File.ReadAllText(unit._manifestFile.FullName);
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foreach (var line in manifest.Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries))
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unit._files.Add(line);
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}
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else
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{
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foreach (var file in directory.GetFiles("*", SearchOption.AllDirectories))
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{
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if (file.Name == _ManifestFileName) continue;
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var relativePath = file.FullName.Substring(directory.FullName.Length + 1);
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unit._files.Add(relativePath);
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}
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}
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return unit;
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}
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public void Add(string file)
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{
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Add(new FileInfo(file));
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}
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internal void Delete()
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{
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_backupPath.Delete(true);
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}
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/// <summary>
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/// Adds a file to the list of changed files and backups it.
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/// </summary>
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/// <param name="file">the file to add</param>
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public void Add(FileInfo file)
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{
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if(!file.FullName.StartsWith(_context.ProjectRoot))
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{
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Console.Error.WriteLine("Invalid file path for backup! {0}", file);
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return;
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}
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var relativePath = file.FullName.Substring(_context.ProjectRoot.Length + 1);
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var backupPath = new FileInfo(Path.Combine(_backupPath.FullName, relativePath));
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if(_files.Contains(relativePath))
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{
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Console.WriteLine("Skipping backup of {0}", relativePath);
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return;
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}
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// Copy over
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backupPath.Directory?.Create();
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if (file.Exists)
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{
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_ = file.CopyTo(backupPath.FullName);
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}
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else
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{
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// Make empty file
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//backupPath.Create().Close();
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// don't do this bc its dumb
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}
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if (!File.Exists(_manifestFile.FullName))
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_manifestFile.Create().Close();
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var stream = _manifestFile.AppendText();
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stream.WriteLine(relativePath);
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stream.Close();
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// Add to list
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_files.Add(relativePath);
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}
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/// <summary>
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/// Reverts the changes made in this unit.
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/// </summary>
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public void Restore()
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{
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foreach(var relativePath in _files)
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{
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Console.WriteLine("Restoring {0}", relativePath);
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// Original version
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var backupFile = new FileInfo(Path.Combine(_backupPath.FullName, relativePath));
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var target = new FileInfo(Path.Combine(_context.ProjectRoot, relativePath));
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if (backupFile.Exists && backupFile.Length > 0)
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{
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Console.WriteLine(" {0} => {1}", backupFile.FullName, target.FullName);
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target.Directory?.Create();
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_ = backupFile.CopyTo(target.FullName, true);
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}
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else
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{
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Console.WriteLine(" x {0}", target.FullName);
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if(target.Exists)
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{
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target.Delete();
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}
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}
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}
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}
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}
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}
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