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using IPA.Utilities;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
#if NET3
using Net3_Proxy;
using Path = Net3_Proxy.Path;
using File = Net3_Proxy.File;
using Directory = Net3_Proxy.Directory;
#endif
namespace IPA.Injector
{
internal static class GameVersionEarly
{
internal static string ResolveDataPath(string installDir) =>
Directory.EnumerateDirectories(installDir, "*_Data").First();
internal static string GlobalGameManagers(string installDir) =>
Path.Combine(ResolveDataPath(installDir), "globalgamemanagers");
internal static string GetGameVersion()
{
var mgr = GlobalGameManagers(BeatSaber.InstallPath);
using (var stream = File.OpenRead(mgr))
using (var reader = new BinaryReader(stream, Encoding.UTF8))
{
const string key = "public.app-category.games";
int pos = 0;
while (stream.Position < stream.Length && pos < key.Length)
{
if (reader.ReadByte() == key[pos]) pos++;
else pos = 0;
}
if (stream.Position == stream.Length) // we went through the entire stream without finding the key
throw new KeyNotFoundException("Could not find key '" + key + "' in " + mgr);
// otherwise pos == key.Length, which means we found it
int offset = 136 - key.Length - sizeof(int);
stream.Seek(offset, SeekOrigin.Current); // advance past junk to beginning of string
int strlen = reader.ReadInt32(); // assumes LE
var strbytes = reader.ReadBytes(strlen);
return Encoding.UTF8.GetString(strbytes);
}
}
internal static SemVer.Version SafeParseVersion() => new SemVer.Version(GetGameVersion(), true);
private static void _Load()
{
BeatSaber.SetEarlyGameVersion(SafeParseVersion());
BeatSaber.CheckGameVersionBoundary();
}
internal static void Load()
{
// This exists for the same reason the wierdness in Injector.Main does
_ = Type.GetType("SemVer.Version, SemVer", false);
_Load();
}
}
}