mirror of
https://github.com/ppy/osu.git
synced 2024-11-11 17:47:29 +08:00
94 lines
3.7 KiB
C#
94 lines
3.7 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
|
|
// See the LICENCE file in the repository root for full licence text.
|
|
|
|
#nullable disable
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.IO;
|
|
using System.Linq;
|
|
using osu.Framework.Platform;
|
|
using osu.Game.Extensions;
|
|
using osu.Game.Utils;
|
|
using SharpCompress.Archives.Zip;
|
|
|
|
namespace osu.Game.Database
|
|
{
|
|
/// <summary>
|
|
/// A class which handles exporting legacy user data of a single type from osu-stable.
|
|
/// </summary>
|
|
public abstract class LegacyExporter<TModel>
|
|
where TModel : class, IHasNamedFiles
|
|
{
|
|
/// <summary>
|
|
/// Max length of filename (including extension).
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// <para>
|
|
/// The filename limit for most OSs is 255. This actual usable length is smaller because <see cref="Storage.CreateFileSafely(string)"/> adds an additional "_<see cref="Guid"/>" to the end of the path.
|
|
/// </para>
|
|
/// <para>
|
|
/// For more information see <see href="https://www.ibm.com/docs/en/spectrum-protect/8.1.9?topic=parameters-file-specification-syntax">file specification syntax</see>, <seealso href="https://en.wikipedia.org/wiki/Comparison_of_file_systems#Limits">file systems limitations</seealso>
|
|
/// </para>
|
|
/// </remarks>
|
|
public const int MAX_FILENAME_LENGTH = 255 - (32 + 4 + 2 + 5); //max path - (Guid + Guid "D" format chars + Storage.CreateFileSafely chars + account for ' (99)' suffix)
|
|
|
|
/// <summary>
|
|
/// The file extension for exports (including the leading '.').
|
|
/// </summary>
|
|
protected abstract string FileExtension { get; }
|
|
|
|
protected readonly Storage UserFileStorage;
|
|
|
|
private readonly Storage exportStorage;
|
|
|
|
protected LegacyExporter(Storage storage)
|
|
{
|
|
exportStorage = storage.GetStorageForDirectory(@"exports");
|
|
UserFileStorage = storage.GetStorageForDirectory(@"files");
|
|
}
|
|
|
|
protected virtual string GetFilename(TModel item) => item.GetDisplayString();
|
|
|
|
/// <summary>
|
|
/// Exports an item to a legacy (.zip based) package.
|
|
/// </summary>
|
|
/// <param name="item">The item to export.</param>
|
|
public void Export(TModel item)
|
|
{
|
|
string itemFilename = GetFilename(item).GetValidFilename();
|
|
|
|
if (itemFilename.Length > MAX_FILENAME_LENGTH - FileExtension.Length)
|
|
itemFilename = itemFilename.Remove(MAX_FILENAME_LENGTH - FileExtension.Length);
|
|
|
|
IEnumerable<string> existingExports =
|
|
exportStorage
|
|
.GetFiles(string.Empty, $"{itemFilename}*{FileExtension}")
|
|
.Concat(exportStorage.GetDirectories(string.Empty));
|
|
|
|
string filename = NamingUtils.GetNextBestFilename(existingExports, $"{itemFilename}{FileExtension}");
|
|
|
|
using (var stream = exportStorage.CreateFileSafely(filename))
|
|
ExportModelTo(item, stream);
|
|
|
|
exportStorage.PresentFileExternally(filename);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Exports an item to the given output stream.
|
|
/// </summary>
|
|
/// <param name="model">The item to export.</param>
|
|
/// <param name="outputStream">The output stream to export to.</param>
|
|
public virtual void ExportModelTo(TModel model, Stream outputStream)
|
|
{
|
|
using (var archive = ZipArchive.Create())
|
|
{
|
|
foreach (var file in model.Files)
|
|
archive.AddEntry(file.Filename, UserFileStorage.GetStream(file.File.GetStoragePath()));
|
|
|
|
archive.SaveTo(outputStream);
|
|
}
|
|
}
|
|
}
|
|
}
|