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/* Copyright (C) 2022 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "ModInstaller.h"
#include "lib/file/vfs/vfs_util.h"
#include "lib/file/file_system.h"
#include "lib/sysdep/os.h"
#include "ps/CLogger.h"
#include "ps/Filesystem.h"
#include "ps/XML/Xeromyces.h"
#include "scriptinterface/ScriptInterface.h"
#include "scriptinterface/JSON.h"
#if !OS_WIN
#include "lib/os_path.h"
#endif
#include <fstream>
#if OS_WIN
#include <filesystem>
#endif
CModInstaller::CModInstaller(const OsPath& modsdir, const OsPath& tempdir) :
m_ModsDir(modsdir), m_TempDir(tempdir / "_modscache"), m_CacheDir("cache/")
{
m_VFS = CreateVfs();
CreateDirectories(m_TempDir, 0700);
}
CModInstaller::~CModInstaller()
{
m_VFS.reset();
DeleteDirectory(m_TempDir);
}
CModInstaller::ModInstallationResult CModInstaller::Install(
const OsPath& mod,
const std::shared_ptr<ScriptContext>& scriptContext,
bool keepFile)
{
const OsPath modTemp = m_TempDir / mod.Basename() / mod.Filename().ChangeExtension(L".zip");
CreateDirectories(modTemp.Parent(), 0700);
if (keepFile)
{
if (CopyFile(mod, modTemp, true) != INFO::OK)
{
LOGERROR("Failed to copy '%s' to '%s'", mod.string8().c_str(), modTemp.string8().c_str());
return FAIL_ON_MOD_COPY;
}
}
else if (RenameFile(mod, modTemp) != INFO::OK)
{
LOGERROR("Failed to rename '%s' into '%s'", mod.string8().c_str(), modTemp.string8().c_str());
return FAIL_ON_MOD_MOVE;
}
// Load the mod to VFS
if (m_VFS->Mount(m_CacheDir, m_TempDir / "") != INFO::OK)
return FAIL_ON_VFS_MOUNT;
CVFSFile modinfo;
PSRETURN modinfo_status = modinfo.Load(m_VFS, m_CacheDir / modTemp.Basename() / "mod.json", false);
m_VFS->Clear();
if (modinfo_status != PSRETURN_OK)
return FAIL_ON_MOD_LOAD;
// Extract the name of the mod
CStr modName;
{
ScriptInterface scriptInterface("Engine", "ModInstaller", scriptContext);
ScriptRequest rq(scriptInterface);
JS::RootedValue json_val(rq.cx);
if (!Script::ParseJSON(rq, modinfo.GetAsString(), &json_val))
return FAIL_ON_PARSE_JSON;
JS::RootedObject json_obj(rq.cx, json_val.toObjectOrNull());
JS::RootedValue name_val(rq.cx);
if (!JS_GetProperty(rq.cx, json_obj, "name", &name_val))
return FAIL_ON_EXTRACT_NAME;
Script::FromJSVal(rq, name_val, modName);
if (modName.empty())
return FAIL_ON_EXTRACT_NAME;
}
const OsPath modDir = m_ModsDir / modName;
const OsPath modPath = modDir / (modName + ".zip");
// Create a directory with the following structure:
// mod-name/
// mod-name.zip
// mod.json
CreateDirectories(modDir, 0700);
if (RenameFile(modTemp, modPath) != INFO::OK)
{
LOGERROR("Failed to rename '%s' into '%s'", modTemp.string8().c_str(), modPath.string8().c_str());
return FAIL_ON_MOD_MOVE;
}
DeleteDirectory(modTemp.Parent());
#if OS_WIN
const std::filesystem::path modJsonPath = (modDir / L"mod.json").fileSystemPath();
#else
const std::string modJsonPath = OsString(modDir / L"mod.json");
#endif
std::ofstream mod_json(modJsonPath);
if (mod_json.good())
{
mod_json << modinfo.GetAsString();
mod_json.close();
}
else
return FAIL_ON_JSON_WRITE;
m_InstalledMods.emplace_back(modName);
return SUCCESS;
}
const std::vector<CStr>& CModInstaller::GetInstalledMods() const
{
return m_InstalledMods;
}
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