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147 lines
4.6 KiB
147 lines
4.6 KiB
using IPA.Logging;
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using IPA.Utilities;
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using System;
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using System.Collections.Generic;
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using System.Collections.Specialized;
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using System.IO;
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using System.Linq;
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using System.Text;
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namespace IPA.Updating.Backup
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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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internal class BackupUnit
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{
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public string Name { get; private set; }
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private DirectoryInfo _BackupPath;
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private List<string> _Files = new List<string>();
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private FileInfo _ManifestFile;
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private static string _ManifestFileName = "$manifest$.txt";
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public BackupUnit(string path) : this(path, DateTime.Now.ToString("yyyy-MM-dd_h-mm-ss"))
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{
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}
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internal BackupUnit(string path, string name)
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{
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Name = name;
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_BackupPath = new DirectoryInfo(Path.Combine(path, 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, string backupPath)
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{
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var unit = new BackupUnit(backupPath, directory.Name);
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// Read Manifest
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if (unit._ManifestFile.Exists)
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{
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string manifest = File.ReadAllText(unit._ManifestFile.FullName);
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foreach (var line in manifest.Split(new string[] { 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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if (_BackupPath.Exists)
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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"></param>
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public void Add(FileInfo file)
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{
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var relativePath = LoneFunctions.GetRelativePath(file.FullName, Environment.CurrentDirectory);
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var backupPath = new FileInfo(Path.Combine(_BackupPath.FullName, relativePath));
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Logger.updater.Debug($"rp={relativePath}, bp={backupPath}");
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if (_Files.Contains(relativePath))
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{
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Logger.updater.Debug($"Skipping backup of {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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}
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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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Logger.updater.Debug($"Restoring {relativePath}");
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// Original version
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var backupFile = new FileInfo(Path.Combine(_BackupPath.FullName, relativePath));
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var target = new FileInfo(Path.Combine(Environment.CurrentDirectory, relativePath));
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if (backupFile.Exists)
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{
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if (backupFile.Length > 0)
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{
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Logger.updater.Debug($" {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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Logger.updater.Debug($" x {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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else
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{
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Logger.updater.Error("Backup not found!");
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}
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}
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}
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}
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}
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