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/* Copyright 2015 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <QDir>
#include <QString>
#include <QDebug>
#include "World.h"
#include <pathutils.h>
#include "GZip.h"
#include <sstream>
#include <io/stream_reader.h>
#include <tag_string.h>
#include <tag_primitive.h>
World::World(const QFileInfo &file)
{
repath(file);
}
void World::repath(const QFileInfo &file)
{
m_file = file;
m_folderName = file.fileName();
QDir worldDir(file.filePath());
is_valid = file.isDir() && worldDir.exists("level.dat");
if(!is_valid)
{
return;
}
auto fullFilePath = worldDir.absoluteFilePath("level.dat");
QFile f(fullFilePath);
is_valid = f.open(QIODevice::ReadOnly);
if(!is_valid)
{
return;
}
QByteArray output;
is_valid = GZip::inflate(f.readAll(), output);
if(!is_valid)
{
return;
}
f.close();
auto read_string = [](nbt::value& parent, const char * name, const QString & fallback = QString()) -> QString
{
try
{
auto &namedValue = parent.at(name);
if(namedValue.get_type() != nbt::tag_type::String)
{
return fallback;
}
auto & tag_str = namedValue.as<nbt::tag_string>();
return QString::fromStdString(tag_str.get());
}
catch(std::out_of_range e)
{
// fallback for old world formats
qWarning() << "String NBT tag" << name << "could not be found. Defaulting to" << fallback;
return fallback;
}
catch(std::bad_cast e)
{
// type mismatch
qWarning() << "NBT tag" << name << "could not be converted to string. Defaulting to" << fallback;
return fallback;
}
};
auto read_long = [](nbt::value& parent, const char * name, const int64_t & fallback = 0) -> int64_t
{
try
{
auto &namedValue = parent.at(name);
if(namedValue.get_type() != nbt::tag_type::Long)
{
return fallback;
}
auto & tag_str = namedValue.as<nbt::tag_long>();
return tag_str.get();
}
catch(std::out_of_range e)
{
// fallback for old world formats
qWarning() << "Long NBT tag" << name << "could not be found. Defaulting to" << fallback;
return fallback;
}
catch(std::bad_cast e)
{
// type mismatch
qWarning() << "NBT tag" << name << "could not be converted to long. Defaulting to" << fallback;
return fallback;
}
};
try
{
std::istringstream foo(std::string(output.constData(), output.size()));
auto pair = nbt::io::read_compound(foo);
is_valid = pair.first == "";
if(!is_valid)
{
return;
}
std::ostringstream ostr;
is_valid = pair.second != nullptr;
if(!is_valid)
{
qDebug() << "FAIL~!!!";
return;
}
auto &val = pair.second->at("Data");
is_valid = val.get_type() == nbt::tag_type::Compound;
if(!is_valid)
return;
m_actualName = read_string(val, "LevelName", m_folderName);
int64_t temp = read_long(val, "LastPlayed", 0);
if(temp == 0)
{
QFileInfo finfo(fullFilePath);
m_lastPlayed = finfo.lastModified();
}
else
{
m_lastPlayed = QDateTime::fromMSecsSinceEpoch(temp);
}
m_randomSeed = read_long(val, "RandomSeed", 0);
qDebug() << "World Name:" << m_actualName;
qDebug() << "Last Played:" << m_lastPlayed.toString();
qDebug() << "Seed:" << m_randomSeed;
}
catch (nbt::io::input_error e)
{
qWarning() << "Unable to load" << m_folderName << ":" << e.what();
is_valid = false;
return;
}
}
bool World::replace(World &with)
{
if (!destroy())
return false;
bool success = copyPath(with.m_file.filePath(), m_file.path());
if (success)
{
m_folderName = with.m_folderName;
m_file.refresh();
}
return success;
}
bool World::destroy()
{
if(!is_valid) return false;
if (m_file.isDir())
{
QDir d(m_file.filePath());
if (d.removeRecursively())
{
return true;
}
return false;
}
else
{
return false;
}
return true;
}
bool World::operator==(const World &other) const
{
return is_valid == other.is_valid && folderName() == other.folderName();
}
bool World::strongCompare(const World &other) const
{
return is_valid == other.is_valid && folderName() == other.folderName();
}
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