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osu-lazer/osu.Game/IO/StableStorage.cs
2022-06-17 16:37:17 +09:00

71 lines
2.4 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.IO;
using System.Linq;
using osu.Framework.Platform;
namespace osu.Game.IO
{
/// <summary>
/// A storage pointing to an osu-stable installation.
/// Provides methods for handling installations with a custom Song folder location.
/// </summary>
public class StableStorage : DesktopStorage
{
public const string STABLE_DEFAULT_SONGS_PATH = "Songs";
private readonly DesktopGameHost host;
private readonly Lazy<string> songsPath;
public StableStorage(string path, DesktopGameHost host)
: base(path, host)
{
this.host = host;
songsPath = new Lazy<string>(locateSongsDirectory);
}
/// <summary>
/// Returns a <see cref="Storage"/> pointing to the osu-stable Songs directory.
/// </summary>
public Storage GetSongStorage() => new DesktopStorage(songsPath.Value, host);
private string locateSongsDirectory()
{
var configurationFiles = GetFiles(".", $"osu!.{Environment.UserName}.cfg");
// GetFiles returns case insensitive results, so multiple files could exist.
// Prefer a case-correct match, but fallback to any available.
string usableConfigFile =
configurationFiles.FirstOrDefault(f => f.Contains(Environment.UserName, StringComparison.Ordinal))
?? configurationFiles.FirstOrDefault();
if (usableConfigFile != null)
{
using (var stream = GetStream(usableConfigFile))
using (var textReader = new StreamReader(stream))
{
string line;
while ((line = textReader.ReadLine()) != null)
{
if (!line.StartsWith("BeatmapDirectory", StringComparison.OrdinalIgnoreCase)) continue;
string customDirectory = line.Split('=').LastOrDefault()?.Trim();
if (customDirectory != null && Path.IsPathFullyQualified(customDirectory))
return customDirectory;
break;
}
}
}
return GetFullPath(STABLE_DEFAULT_SONGS_PATH);
}
}
}