386 lines
8.2 KiB
C++
386 lines
8.2 KiB
C++
/* Copyright 2015-2018 MultiMC Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <QDir>
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#include <QString>
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#include <QDebug>
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#include <QSaveFile>
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#include "World.h"
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#include "GZip.h"
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#include <MMCZip.h>
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#include <FileSystem.h>
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#include <sstream>
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#include <io/stream_reader.h>
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#include <tag_string.h>
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#include <tag_primitive.h>
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#include <quazip.h>
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#include <quazipfile.h>
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#include <quazipdir.h>
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std::unique_ptr <nbt::tag_compound> parseLevelDat(QByteArray data)
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{
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QByteArray output;
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if(!GZip::unzip(data, output))
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{
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return nullptr;
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}
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std::istringstream foo(std::string(output.constData(), output.size()));
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auto pair = nbt::io::read_compound(foo);
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if(pair.first != "")
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return nullptr;
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if(pair.second == nullptr)
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return nullptr;
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return std::move(pair.second);
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}
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QByteArray serializeLevelDat(nbt::tag_compound * levelInfo)
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{
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std::ostringstream s;
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nbt::io::write_tag("", *levelInfo, s);
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QByteArray val( s.str().data(), (int) s.str().size() );
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return val;
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}
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QString getLevelDatFromFS(const QFileInfo &file)
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{
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QDir worldDir(file.filePath());
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if(!file.isDir() || !worldDir.exists("level.dat"))
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{
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return QString();
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}
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return worldDir.absoluteFilePath("level.dat");
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}
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QByteArray getLevelDatDataFromFS(const QFileInfo &file)
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{
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auto fullFilePath = getLevelDatFromFS(file);
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if(fullFilePath.isNull())
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{
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return QByteArray();
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}
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QFile f(fullFilePath);
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if(!f.open(QIODevice::ReadOnly))
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{
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return QByteArray();
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}
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return f.readAll();
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}
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bool putLevelDatDataToFS(const QFileInfo &file, QByteArray & data)
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{
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auto fullFilePath = getLevelDatFromFS(file);
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if(fullFilePath.isNull())
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{
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return false;
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}
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QSaveFile f(fullFilePath);
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if(!f.open(QIODevice::WriteOnly))
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{
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return false;
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}
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QByteArray compressed;
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if(!GZip::zip(data, compressed))
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{
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return false;
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}
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if(f.write(compressed) != compressed.size())
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{
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f.cancelWriting();
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return false;
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}
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return f.commit();
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}
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World::World(const QFileInfo &file)
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{
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repath(file);
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}
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void World::repath(const QFileInfo &file)
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{
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m_containerFile = file;
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m_folderName = file.fileName();
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if(file.isFile() && file.suffix() == "zip")
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{
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readFromZip(file);
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}
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else if(file.isDir())
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{
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readFromFS(file);
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}
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}
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void World::readFromFS(const QFileInfo &file)
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{
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auto bytes = getLevelDatDataFromFS(file);
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if(bytes.isEmpty())
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{
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is_valid = false;
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return;
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}
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loadFromLevelDat(bytes);
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levelDatTime = file.lastModified();
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}
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void World::readFromZip(const QFileInfo &file)
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{
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QuaZip zip(file.absoluteFilePath());
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is_valid = zip.open(QuaZip::mdUnzip);
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if (!is_valid)
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{
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return;
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}
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auto location = MMCZip::findFolderOfFileInZip(&zip, "level.dat");
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is_valid = !location.isEmpty();
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if (!is_valid)
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{
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return;
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}
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m_containerOffsetPath = location;
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QuaZipFile zippedFile(&zip);
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// read the install profile
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is_valid = zip.setCurrentFile(location + "level.dat");
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if (!is_valid)
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{
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return;
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}
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is_valid = zippedFile.open(QIODevice::ReadOnly);
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QuaZipFileInfo64 levelDatInfo;
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zippedFile.getFileInfo(&levelDatInfo);
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auto modTime = levelDatInfo.getNTFSmTime();
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if(!modTime.isValid())
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{
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modTime = levelDatInfo.dateTime;
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}
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levelDatTime = modTime;
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if (!is_valid)
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{
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return;
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}
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loadFromLevelDat(zippedFile.readAll());
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zippedFile.close();
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}
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bool World::install(const QString &to, const QString &name)
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{
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auto finalPath = FS::PathCombine(to, FS::DirNameFromString(m_actualName, to));
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if(!FS::ensureFolderPathExists(finalPath))
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{
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return false;
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}
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bool ok = false;
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if(m_containerFile.isFile())
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{
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QuaZip zip(m_containerFile.absoluteFilePath());
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if (!zip.open(QuaZip::mdUnzip))
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{
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return false;
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}
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ok = !MMCZip::extractSubDir(&zip, m_containerOffsetPath, finalPath).isEmpty();
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}
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else if(m_containerFile.isDir())
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{
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QString from = m_containerFile.filePath();
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ok = FS::copy(from, finalPath)();
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}
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if(ok && !name.isEmpty() && m_actualName != name)
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{
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World newWorld(finalPath);
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if(newWorld.isValid())
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{
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newWorld.rename(name);
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}
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}
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return ok;
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}
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bool World::rename(const QString &newName)
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{
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if(m_containerFile.isFile())
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{
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return false;
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}
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auto data = getLevelDatDataFromFS(m_containerFile);
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if(data.isEmpty())
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{
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return false;
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}
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auto worldData = parseLevelDat(data);
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if(!worldData)
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{
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return false;
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}
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auto &val = worldData->at("Data");
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if(val.get_type() != nbt::tag_type::Compound)
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{
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return false;
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}
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auto &dataCompound = val.as<nbt::tag_compound>();
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dataCompound.put("LevelName", nbt::value_initializer(newName.toUtf8().data()));
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data = serializeLevelDat(worldData.get());
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putLevelDatDataToFS(m_containerFile, data);
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m_actualName = newName;
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QDir parentDir(m_containerFile.absoluteFilePath());
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parentDir.cdUp();
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QFile container(m_containerFile.absoluteFilePath());
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auto dirName = FS::DirNameFromString(m_actualName, parentDir.absolutePath());
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container.rename(parentDir.absoluteFilePath(dirName));
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return true;
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}
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static QString read_string (nbt::value& parent, const char * name, const QString & fallback = QString())
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{
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try
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{
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auto &namedValue = parent.at(name);
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if(namedValue.get_type() != nbt::tag_type::String)
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{
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return fallback;
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}
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auto & tag_str = namedValue.as<nbt::tag_string>();
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return QString::fromStdString(tag_str.get());
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}
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catch (const std::out_of_range &e)
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{
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// fallback for old world formats
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qWarning() << "String NBT tag" << name << "could not be found. Defaulting to" << fallback;
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return fallback;
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}
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catch (const std::bad_cast &e)
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{
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// type mismatch
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qWarning() << "NBT tag" << name << "could not be converted to string. Defaulting to" << fallback;
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return fallback;
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}
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}
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static int64_t read_long (nbt::value& parent, const char * name, const int64_t & fallback = 0)
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{
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try
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{
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auto &namedValue = parent.at(name);
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if(namedValue.get_type() != nbt::tag_type::Long)
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{
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return fallback;
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}
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auto & tag_str = namedValue.as<nbt::tag_long>();
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return tag_str.get();
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}
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catch (const std::out_of_range &e)
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{
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// fallback for old world formats
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qWarning() << "Long NBT tag" << name << "could not be found. Defaulting to" << fallback;
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return fallback;
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}
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catch (const std::bad_cast &e)
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{
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// type mismatch
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qWarning() << "NBT tag" << name << "could not be converted to long. Defaulting to" << fallback;
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return fallback;
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}
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}
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void World::loadFromLevelDat(QByteArray data)
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{
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try
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{
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auto levelData = parseLevelDat(data);
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if(!levelData)
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{
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is_valid = false;
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return;
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}
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auto &val = levelData->at("Data");
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is_valid = val.get_type() == nbt::tag_type::Compound;
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if(!is_valid)
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return;
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m_actualName = read_string(val, "LevelName", m_folderName);
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int64_t temp = read_long(val, "LastPlayed", 0);
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if(temp == 0)
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{
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m_lastPlayed = levelDatTime;
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}
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else
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{
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m_lastPlayed = QDateTime::fromMSecsSinceEpoch(temp);
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}
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m_randomSeed = read_long(val, "RandomSeed", 0);
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qDebug() << "World Name:" << m_actualName;
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qDebug() << "Last Played:" << m_lastPlayed.toString();
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qDebug() << "Seed:" << m_randomSeed;
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}
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catch (const nbt::io::input_error &e)
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{
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qWarning() << "Unable to load" << m_folderName << ":" << e.what();
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is_valid = false;
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return;
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}
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}
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bool World::replace(World &with)
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{
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if (!destroy())
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return false;
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bool success = FS::copy(with.m_containerFile.filePath(), m_containerFile.path())();
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if (success)
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{
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m_folderName = with.m_folderName;
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m_containerFile.refresh();
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}
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return success;
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}
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bool World::destroy()
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{
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if(!is_valid) return false;
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if (m_containerFile.isDir())
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{
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QDir d(m_containerFile.filePath());
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return d.removeRecursively();
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}
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else if(m_containerFile.isFile())
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{
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QFile file(m_containerFile.absoluteFilePath());
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return file.remove();
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}
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return true;
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}
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bool World::operator==(const World &other) const
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{
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return is_valid == other.is_valid && folderName() == other.folderName();
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}
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bool World::strongCompare(const World &other) const
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{
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return is_valid == other.is_valid && folderName() == other.folderName();
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}
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