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using IPA.Logging;
using IPA.Utilities;
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.Linq;
using System.Text;
namespace IPA.Updating.Backup
{
/// <summary>
/// A unit for backup. WIP.
/// </summary>
internal class BackupUnit
{
public string Name { get; private set; }
private DirectoryInfo _BackupPath;
private List<string> _Files = new List<string>();
private FileInfo _ManifestFile;
private static string _ManifestFileName = "$manifest$.txt";
public BackupUnit(string path) : this(path, DateTime.Now.ToString("yyyy-MM-dd_h-mm-ss"))
{
}
internal BackupUnit(string path, string name)
{
Name = name;
_BackupPath = new DirectoryInfo(Path.Combine(path, Name));
_ManifestFile = new FileInfo(Path.Combine(_BackupPath.FullName, _ManifestFileName));
}
public static BackupUnit FromDirectory(DirectoryInfo directory, string backupPath)
{
var unit = new BackupUnit(backupPath, directory.Name);
// Read Manifest
if (unit._ManifestFile.Exists)
{
string manifest = File.ReadAllText(unit._ManifestFile.FullName);
foreach (var line in manifest.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries))
unit._Files.Add(line);
}
else
{
foreach (var file in directory.GetFiles("*", SearchOption.AllDirectories))
{
if (file.Name == _ManifestFileName) continue;
var relativePath = file.FullName.Substring(directory.FullName.Length + 1);
unit._Files.Add(relativePath);
}
}
return unit;
}
public void Add(string file)
{
Add(new FileInfo(file));
}
internal void Delete()
{
_BackupPath.Delete(true);
}
/// <summary>
/// Adds a file to the list of changed files and backups it.
/// </summary>
/// <param name="file"></param>
public void Add(FileInfo file)
{
var relativePath = LoneFunctions.GetRelativePath(Environment.CurrentDirectory, file.FullName);
var backupPath = new FileInfo(Path.Combine(_BackupPath.FullName, relativePath));
if (_Files.Contains(relativePath))
{
Logger.log.Debug($"Skipping backup of {relativePath}");
return;
}
// Copy over
backupPath.Directory.Create();
if (file.Exists)
{
file.CopyTo(backupPath.FullName);
}
else
{
// Make empty file
backupPath.Create().Close();
}
if (!File.Exists(_ManifestFile.FullName))
_ManifestFile.Create().Close();
var stream = _ManifestFile.AppendText();
stream.WriteLine(relativePath);
stream.Close();
// Add to list
_Files.Add(relativePath);
}
/// <summary>
/// Reverts the changes made in this unit.
/// </summary>
public void Restore()
{
foreach (var relativePath in _Files)
{
Logger.log.Debug($"Restoring {relativePath}");
// Original version
var backupFile = new FileInfo(Path.Combine(_BackupPath.FullName, relativePath));
var target = new FileInfo(Path.Combine(Environment.CurrentDirectory, relativePath));
if (backupFile.Exists)
{
if (backupFile.Length > 0)
{
Logger.log.Debug($" {backupFile.FullName} => {target.FullName}");
target.Directory.Create();
backupFile.CopyTo(target.FullName, true);
}
else
{
Logger.log.Debug($" x {target.FullName}");
if (target.Exists)
{
target.Delete();
}
}
}
else
{
Logger.log.Error("Backup not found!");
}
}
}
}
}