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osu-lazer/osu.Game.Tournament/IPC/FileBasedIPC.cs

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// 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.
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using System;
using System.IO;
using System.Linq;
using JetBrains.Annotations;
using Microsoft.Win32;
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using osu.Framework.Allocation;
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using osu.Framework.Logging;
using osu.Framework.Platform;
using osu.Framework.Threading;
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using osu.Game.Beatmaps;
using osu.Game.Beatmaps.Legacy;
using osu.Game.Online.API;
using osu.Game.Online.API.Requests;
using osu.Game.Rulesets;
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using osu.Game.Tournament.Models;
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namespace osu.Game.Tournament.IPC
{
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public class FileBasedIPC : MatchIPCInfo
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{
public Storage IPCStorage { get; private set; }
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[Resolved]
protected IAPIProvider API { get; private set; }
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[Resolved]
protected RulesetStore Rulesets { get; private set; }
[Resolved]
private GameHost host { get; set; }
[Resolved]
private LadderInfo ladder { get; set; }
[Resolved]
private StableInfo stableInfo { get; set; }
private int lastBeatmapId;
private ScheduledDelegate scheduled;
private GetBeatmapRequest beatmapLookupRequest;
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[BackgroundDependencyLoader]
private void load()
{
var stablePath = stableInfo.StablePath ?? findStablePath();
initialiseIPCStorage(stablePath);
}
[CanBeNull]
private Storage initialiseIPCStorage(string path)
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{
scheduled?.Cancel();
IPCStorage = null;
try
{
if (string.IsNullOrEmpty(path))
return null;
IPCStorage = new DesktopStorage(path, host as DesktopGameHost);
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const string file_ipc_filename = "ipc.txt";
const string file_ipc_state_filename = "ipc-state.txt";
const string file_ipc_scores_filename = "ipc-scores.txt";
const string file_ipc_channel_filename = "ipc-channel.txt";
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if (IPCStorage.Exists(file_ipc_filename))
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{
scheduled = Scheduler.AddDelayed(delegate
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{
try
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{
using (var stream = IPCStorage.GetStream(file_ipc_filename))
using (var sr = new StreamReader(stream))
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{
var beatmapId = int.Parse(sr.ReadLine());
var mods = int.Parse(sr.ReadLine());
if (lastBeatmapId != beatmapId)
{
beatmapLookupRequest?.Cancel();
lastBeatmapId = beatmapId;
var existing = ladder.CurrentMatch.Value?.Round.Value?.Beatmaps.FirstOrDefault(b => b.ID == beatmapId && b.BeatmapInfo != null);
if (existing != null)
Beatmap.Value = existing.BeatmapInfo;
else
{
beatmapLookupRequest = new GetBeatmapRequest(new BeatmapInfo { OnlineBeatmapID = beatmapId });
beatmapLookupRequest.Success += b => Beatmap.Value = b.ToBeatmap(Rulesets);
API.Queue(beatmapLookupRequest);
}
}
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Mods.Value = (LegacyMods)mods;
}
}
catch
{
// file might be in use.
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}
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try
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{
using (var stream = IPCStorage.GetStream(file_ipc_channel_filename))
using (var sr = new StreamReader(stream))
{
ChatChannel.Value = sr.ReadLine();
}
}
catch (Exception)
{
// file might be in use.
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}
try
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{
using (var stream = IPCStorage.GetStream(file_ipc_state_filename))
using (var sr = new StreamReader(stream))
{
State.Value = (TourneyState)Enum.Parse(typeof(TourneyState), sr.ReadLine());
}
}
catch (Exception)
{
// file might be in use.
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}
try
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{
using (var stream = IPCStorage.GetStream(file_ipc_scores_filename))
using (var sr = new StreamReader(stream))
{
Score1.Value = int.Parse(sr.ReadLine());
Score2.Value = int.Parse(sr.ReadLine());
}
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}
catch (Exception)
{
// file might be in use.
}
}, 250, true);
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}
}
catch (Exception e)
{
Logger.Error(e, "Stable installation could not be found; disabling file based IPC");
}
return IPCStorage;
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}
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/// <summary>
/// Manually sets the path to the directory used for inter-process communication with a cutting-edge install.
/// </summary>
/// <param name="path">Path to the IPC directory</param>
/// <returns>Whether the supplied path was a valid IPC directory.</returns>
public bool SetIPCLocation(string path)
{
if (path == null || !ipcFileExistsInDirectory(path))
return false;
var newStorage = initialiseIPCStorage(stableInfo.StablePath = path);
if (newStorage == null)
return false;
stableInfo.SaveChanges();
return true;
}
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/// <summary>
/// Tries to automatically detect the path to the directory used for inter-process communication
/// with a cutting-edge install.
/// </summary>
/// <returns>Whether an IPC directory was successfully auto-detected.</returns>
public bool AutoDetectIPCLocation() => SetIPCLocation(findStablePath());
private static bool ipcFileExistsInDirectory(string p) => p != null && File.Exists(Path.Combine(p, "ipc.txt"));
[CanBeNull]
private string findStablePath()
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{
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var stableInstallPath = findFromEnvVar() ??
findFromRegistry() ??
findFromLocalAppData() ??
findFromDotFolder();
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Logger.Log($"Stable path for tourney usage: {stableInstallPath}");
return stableInstallPath;
}
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private string findFromEnvVar()
{
try
{
Logger.Log("Trying to find stable with environment variables");
string stableInstallPath = Environment.GetEnvironmentVariable("OSU_STABLE_PATH");
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if (ipcFileExistsInDirectory(stableInstallPath))
return stableInstallPath;
}
catch
{
}
return null;
}
private string findFromLocalAppData()
{
Logger.Log("Trying to find stable in %LOCALAPPDATA%");
string stableInstallPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), @"osu!");
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if (ipcFileExistsInDirectory(stableInstallPath))
return stableInstallPath;
return null;
}
private string findFromDotFolder()
{
Logger.Log("Trying to find stable in dotfolders");
string stableInstallPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".osu");
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if (ipcFileExistsInDirectory(stableInstallPath))
return stableInstallPath;
return null;
}
private string findFromRegistry()
{
Logger.Log("Trying to find stable in registry");
try
{
string stableInstallPath;
using (RegistryKey key = Registry.ClassesRoot.OpenSubKey("osu"))
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stableInstallPath = key?.OpenSubKey(@"shell\open\command")?.GetValue(string.Empty)?.ToString()?.Split('"')[1].Replace("osu!.exe", "");
if (ipcFileExistsInDirectory(stableInstallPath))
return stableInstallPath;
}
catch
{
}
return null;
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}
}
}