using IPA.Utilities;
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using System;
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using System.Collections.Generic;
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using System.IO;
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namespace IPA.Injector.Backups
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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 readonly DirectoryInfo _backupPath;
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private readonly HashSet<string> _files = new HashSet<string>();
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private readonly FileInfo _manifestFile;
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private const string ManifestFileName = "$manifest$.txt";
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public BackupUnit(string dir) : this(dir, Utils.CurrentTime().ToString("yyyy-MM-dd_h-mm-ss"))
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{
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}
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private BackupUnit(string dir, string name)
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{
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Name = name;
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_backupPath = new DirectoryInfo(Path.Combine(dir, 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 dir)
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{
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var unit = new BackupUnit(dir, 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, "\n", "\r" }, 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"></param>
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public void Add(FileInfo file)
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{
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var relativePath = Utilities.Utils.GetRelativePath(file.FullName, Environment.CurrentDirectory);
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var backupPath = new FileInfo(Path.Combine(_backupPath.FullName, relativePath));
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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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if (File.Exists(backupPath.FullName))
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File.Delete(backupPath.FullName);
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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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// do not do this because it can cause problems
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}
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if (_files.Contains(relativePath)) return;
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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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}
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}
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