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/*
Mod Organizer shared UI functionality
Copyright (C) 2019 MO2 Contributors. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <uibase/steamutility.h>
#include <QDir>
#include <QList>
#include <QRegularExpression>
#include <QSettings>
#include <QString>
#include <QTextStream>
namespace MOBase
{
// Lines that contains libraries are in the format:
// "1" "Path\to\library"
static const QRegularExpression
kSteamLibraryFilter("^\\s*\"(?<idx>[0-9]+)\"\\s*\"(?<path>.*)\"");
QString findSteam()
{
#ifdef _WIN32
QSettings steamRegistry("Valve", "Steam");
return steamRegistry.value("SteamPath").toString();
#else
// On Linux, check common Steam locations
QString homePath = QDir::homePath();
QStringList candidates = {
homePath + "/.steam/steam",
homePath + "/.local/share/Steam",
homePath + "/.steam/debian-installation"
};
for (const auto& path : candidates) {
if (QDir(path).exists()) {
return path;
}
}
return "";
#endif
}
QString findSteamGame(const QString& appName, const QString& validFile)
{
QStringList libraryFolders; // list of Steam libraries to search
QDir steamDir(findSteam()); // Steam installation directory
// Can do nothing if Steam doesn't exist
if (!steamDir.exists())
return "";
// The Steam install is always a valid library
libraryFolders << steamDir.absolutePath();
// Search libraryfolders.vdf for additional libraries
QFile libraryFoldersFile(steamDir.absoluteFilePath("steamapps/libraryfolders.vdf"));
if (libraryFoldersFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
QTextStream in(&libraryFoldersFile);
while (!in.atEnd()) {
QString line = in.readLine();
QRegularExpressionMatch match = kSteamLibraryFilter.match(line);
if (match.hasMatch()) {
QString folder = match.captured("path");
#ifdef _WIN32
folder.replace("/", "\\").replace("\\\\", "\\");
#else
folder.replace("\\\\", "/").replace("\\", "/");
#endif
libraryFolders << folder;
}
}
}
// Search the Steam libraries for the game directory
for (auto library : libraryFolders) {
QDir libraryDir(library);
if (!libraryDir.cd("steamapps/common/" + appName))
continue;
QString normalizedValidFile = validFile;
normalizedValidFile.replace("\\", "/");
if (normalizedValidFile.startsWith('/')) {
normalizedValidFile.remove(0, 1);
}
if (normalizedValidFile.isEmpty() || libraryDir.exists(normalizedValidFile))
return libraryDir.absolutePath();
}
return "";
}
} // namespace MOBase
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