832 lines
22 KiB
C++
832 lines
22 KiB
C++
/* Copyright 2013-2019 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 <QDirIterator>
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#include <QSet>
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#include <QFile>
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#include <QThread>
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#include <QTextStream>
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#include <QXmlStreamReader>
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#include <QTimer>
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#include <QDebug>
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#include <QFileSystemWatcher>
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#include <QUuid>
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#include <QJsonArray>
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#include <QJsonDocument>
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#include "InstanceList.h"
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#include "BaseInstance.h"
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#include "InstanceTask.h"
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#include "settings/INISettingsObject.h"
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#include "minecraft/legacy/LegacyInstance.h"
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#include "NullInstance.h"
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#include "minecraft/MinecraftInstance.h"
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#include "FileSystem.h"
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#include "ExponentialSeries.h"
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#include "WatchLock.h"
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const static int GROUP_FILE_FORMAT_VERSION = 1;
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InstanceList::InstanceList(SettingsObjectPtr settings, const QString & instDir, QObject *parent)
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: QAbstractListModel(parent), m_globalSettings(settings)
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{
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resumeWatch();
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// Create aand normalize path
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if (!QDir::current().exists(instDir))
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{
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QDir::current().mkpath(instDir);
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}
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connect(this, &InstanceList::instancesChanged, this, &InstanceList::providerUpdated);
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// NOTE: canonicalPath requires the path to exist. Do not move this above the creation block!
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m_instDir = QDir(instDir).canonicalPath();
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m_watcher = new QFileSystemWatcher(this);
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connect(m_watcher, &QFileSystemWatcher::directoryChanged, this, &InstanceList::instanceDirContentsChanged);
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m_watcher->addPath(m_instDir);
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}
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InstanceList::~InstanceList()
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{
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}
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int InstanceList::rowCount(const QModelIndex &parent) const
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{
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Q_UNUSED(parent);
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return m_instances.count();
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}
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QModelIndex InstanceList::index(int row, int column, const QModelIndex &parent) const
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{
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Q_UNUSED(parent);
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if (row < 0 || row >= m_instances.size())
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return QModelIndex();
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return createIndex(row, column, (void *)m_instances.at(row).get());
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}
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QVariant InstanceList::data(const QModelIndex &index, int role) const
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{
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if (!index.isValid())
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{
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return QVariant();
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}
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BaseInstance *pdata = static_cast<BaseInstance *>(index.internalPointer());
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switch (role)
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{
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case InstancePointerRole:
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{
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QVariant v = qVariantFromValue((void *)pdata);
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return v;
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}
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case InstanceIDRole:
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{
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return pdata->id();
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}
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case Qt::EditRole:
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case Qt::DisplayRole:
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{
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return pdata->name();
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}
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case Qt::ToolTipRole:
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{
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return pdata->instanceRoot();
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}
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case Qt::DecorationRole:
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{
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return pdata->iconKey();
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}
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// HACK: see GroupView.h in gui!
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case GroupRole:
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{
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return getInstanceGroup(pdata->id());
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}
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default:
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break;
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}
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return QVariant();
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}
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bool InstanceList::setData(const QModelIndex& index, const QVariant& value, int role)
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{
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if (!index.isValid())
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{
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return false;
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}
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if(role != Qt::EditRole)
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{
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return false;
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}
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BaseInstance *pdata = static_cast<BaseInstance *>(index.internalPointer());
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auto newName = value.toString();
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if(pdata->name() == newName)
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{
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return true;
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}
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pdata->setName(newName);
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return true;
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}
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Qt::ItemFlags InstanceList::flags(const QModelIndex &index) const
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{
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Qt::ItemFlags f;
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if (index.isValid())
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{
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f |= (Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsEditable);
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}
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return f;
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}
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GroupId InstanceList::getInstanceGroup(const InstanceId& id) const
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{
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auto inst = getInstanceById(id);
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if(!inst)
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{
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return GroupId();
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}
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auto iter = m_groupMap.find(inst->id());
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if(iter != m_groupMap.end())
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{
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return *iter;
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}
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return GroupId();
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}
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void InstanceList::setInstanceGroup(const InstanceId& id, const GroupId& name)
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{
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auto inst = getInstanceById(id);
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if(!inst)
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{
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qDebug() << "Attempt to set a null instance's group";
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return;
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}
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bool changed = false;
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auto iter = m_groupMap.find(inst->id());
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if(iter != m_groupMap.end())
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{
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if(*iter != name)
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{
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*iter = name;
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changed = true;
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}
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}
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else
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{
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changed = true;
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m_groupMap[id] = name;
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}
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if(changed)
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{
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m_groups.insert(name);
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auto idx = getInstIndex(inst.get());
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emit dataChanged(index(idx), index(idx), {GroupRole});
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saveGroupList();
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}
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}
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QStringList InstanceList::getGroups()
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{
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return m_groups.toList();
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}
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void InstanceList::deleteGroup(const QString& name)
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{
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bool removed = false;
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qDebug() << "Delete group" << name;
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for(auto & instance: m_instances)
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{
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const auto & instID = instance->id();
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auto instGroupName = getInstanceGroup(instID);
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if(instGroupName == name)
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{
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m_groupMap.remove(instID);
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qDebug() << "Remove" << instID << "from group" << name;
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removed = true;
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auto idx = getInstIndex(instance.get());
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if(idx > 0)
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{
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emit dataChanged(index(idx), index(idx), {GroupRole});
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}
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}
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}
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if(removed)
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{
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saveGroupList();
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}
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}
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void InstanceList::deleteInstance(const InstanceId& id)
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{
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auto inst = getInstanceById(id);
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if(!inst)
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{
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qDebug() << "Cannot delete instance" << id << " No such instance is present.";
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return;
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}
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if(m_groupMap.remove(id))
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{
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saveGroupList();
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}
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qDebug() << "Will delete instance" << id;
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if(!FS::deletePath(inst->instanceRoot()))
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{
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qWarning() << "Deletion of instance" << id << "has not been completely successful ...";
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return;
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}
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qDebug() << "Instance" << id << "has been deleted by MultiMC.";
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}
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static QMap<InstanceId, InstanceLocator> getIdMapping(const QList<InstancePtr> &list)
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{
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QMap<InstanceId, InstanceLocator> out;
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int i = 0;
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for(auto & item: list)
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{
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auto id = item->id();
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if(out.contains(id))
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{
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qWarning() << "Duplicate ID" << id << "in instance list";
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}
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out[id] = std::make_pair(item, i);
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i++;
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}
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return out;
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}
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QList< InstanceId > InstanceList::discoverInstances()
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{
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qDebug() << "Discovering instances in" << m_instDir;
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QList<InstanceId> out;
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QDirIterator iter(m_instDir, QDir::Dirs | QDir::NoDot | QDir::NoDotDot | QDir::Readable | QDir::Hidden, QDirIterator::FollowSymlinks);
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while (iter.hasNext())
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{
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QString subDir = iter.next();
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QFileInfo dirInfo(subDir);
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if (!QFileInfo(FS::PathCombine(subDir, "instance.cfg")).exists())
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continue;
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// if it is a symlink, ignore it if it goes to the instance folder
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if(dirInfo.isSymLink())
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{
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QFileInfo targetInfo(dirInfo.symLinkTarget());
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QFileInfo instDirInfo(m_instDir);
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if(targetInfo.canonicalPath() == instDirInfo.canonicalFilePath())
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{
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qDebug() << "Ignoring symlink" << subDir << "that leads into the instances folder";
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continue;
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}
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}
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auto id = dirInfo.fileName();
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out.append(id);
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qDebug() << "Found instance ID" << id;
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}
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instanceSet = out.toSet();
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m_instancesProbed = true;
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return out;
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}
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InstanceList::InstListError InstanceList::loadList()
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{
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auto existingIds = getIdMapping(m_instances);
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QList<InstancePtr> newList;
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for(auto & id: discoverInstances())
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{
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if(existingIds.contains(id))
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{
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auto instPair = existingIds[id];
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existingIds.remove(id);
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qDebug() << "Should keep and soft-reload" << id;
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}
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else
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{
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InstancePtr instPtr = loadInstance(id);
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if(instPtr)
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{
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newList.append(instPtr);
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}
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}
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}
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// TODO: looks like a general algorithm with a few specifics inserted. Do something about it.
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if(!existingIds.isEmpty())
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{
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// get the list of removed instances and sort it by their original index, from last to first
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auto deadList = existingIds.values();
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auto orderSortPredicate = [](const InstanceLocator & a, const InstanceLocator & b) -> bool
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{
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return a.second > b.second;
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};
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std::sort(deadList.begin(), deadList.end(), orderSortPredicate);
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// remove the contiguous ranges of rows
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int front_bookmark = -1;
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int back_bookmark = -1;
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int currentItem = -1;
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auto removeNow = [&]()
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{
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beginRemoveRows(QModelIndex(), front_bookmark, back_bookmark);
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m_instances.erase(m_instances.begin() + front_bookmark, m_instances.begin() + back_bookmark + 1);
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endRemoveRows();
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front_bookmark = -1;
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back_bookmark = currentItem;
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};
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for(auto & removedItem: deadList)
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{
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auto instPtr = removedItem.first;
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instPtr->invalidate();
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currentItem = removedItem.second;
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if(back_bookmark == -1)
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{
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// no bookmark yet
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back_bookmark = currentItem;
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}
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else if(currentItem == front_bookmark - 1)
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{
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// part of contiguous sequence, continue
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}
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else
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{
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// seam between previous and current item
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removeNow();
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}
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front_bookmark = currentItem;
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}
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if(back_bookmark != -1)
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{
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removeNow();
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}
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}
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if(newList.size())
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{
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add(newList);
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}
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m_dirty = false;
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return NoError;
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}
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void InstanceList::saveNow()
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{
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for(auto & item: m_instances)
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{
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item->saveNow();
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}
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}
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void InstanceList::add(const QList<InstancePtr> &t)
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{
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beginInsertRows(QModelIndex(), m_instances.count(), m_instances.count() + t.size() - 1);
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m_instances.append(t);
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for(auto & ptr : t)
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{
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connect(ptr.get(), &BaseInstance::propertiesChanged, this, &InstanceList::propertiesChanged);
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}
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endInsertRows();
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}
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void InstanceList::resumeWatch()
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{
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if(m_watchLevel > 0)
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{
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qWarning() << "Bad suspend level resume in instance list";
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return;
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}
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m_watchLevel++;
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if(m_watchLevel > 0 && m_dirty)
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{
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loadList();
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}
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}
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void InstanceList::suspendWatch()
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{
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m_watchLevel --;
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}
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void InstanceList::providerUpdated()
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{
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m_dirty = true;
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if(m_watchLevel == 1)
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{
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loadList();
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}
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}
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InstancePtr InstanceList::getInstanceById(QString instId) const
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{
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if(instId.isEmpty())
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return InstancePtr();
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for(auto & inst: m_instances)
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{
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if (inst->id() == instId)
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{
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return inst;
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}
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}
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return InstancePtr();
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}
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QModelIndex InstanceList::getInstanceIndexById(const QString &id) const
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{
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return index(getInstIndex(getInstanceById(id).get()));
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}
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int InstanceList::getInstIndex(BaseInstance *inst) const
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{
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int count = m_instances.count();
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for (int i = 0; i < count; i++)
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{
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if (inst == m_instances[i].get())
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{
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return i;
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}
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}
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return -1;
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}
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void InstanceList::propertiesChanged(BaseInstance *inst)
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{
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int i = getInstIndex(inst);
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if (i != -1)
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{
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emit dataChanged(index(i), index(i));
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}
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}
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InstancePtr InstanceList::loadInstance(const InstanceId& id)
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{
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if(!m_groupsLoaded)
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{
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loadGroupList();
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}
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auto instanceRoot = FS::PathCombine(m_instDir, id);
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auto instanceSettings = std::make_shared<INISettingsObject>(FS::PathCombine(instanceRoot, "instance.cfg"));
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InstancePtr inst;
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instanceSettings->registerSetting("InstanceType", "Legacy");
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QString inst_type = instanceSettings->get("InstanceType").toString();
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if (inst_type == "OneSix" || inst_type == "Nostalgia")
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{
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inst.reset(new MinecraftInstance(m_globalSettings, instanceSettings, instanceRoot));
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}
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else if (inst_type == "Legacy")
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{
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inst.reset(new LegacyInstance(m_globalSettings, instanceSettings, instanceRoot));
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}
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else
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{
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inst.reset(new NullInstance(m_globalSettings, instanceSettings, instanceRoot));
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}
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qDebug() << "Loaded instance " << inst->name() << " from " << inst->instanceRoot();
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return inst;
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}
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void InstanceList::saveGroupList()
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{
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qDebug() << "Will save group list now.";
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if(!m_instancesProbed)
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{
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qDebug() << "Group saving prevented because we don't know the full list of instances yet.";
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return;
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}
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WatchLock foo(m_watcher, m_instDir);
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QString groupFileName = m_instDir + "/instgroups.json";
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QMap<QString, QSet<QString>> reverseGroupMap;
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for (auto iter = m_groupMap.begin(); iter != m_groupMap.end(); iter++)
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{
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QString id = iter.key();
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QString group = iter.value();
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if (group.isEmpty())
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continue;
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if(!instanceSet.contains(id))
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{
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qDebug() << "Skipping saving missing instance" << id << "to groups list.";
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continue;
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}
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if (!reverseGroupMap.count(group))
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{
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QSet<QString> set;
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set.insert(id);
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reverseGroupMap[group] = set;
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}
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else
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{
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QSet<QString> &set = reverseGroupMap[group];
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set.insert(id);
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}
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}
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QJsonObject toplevel;
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toplevel.insert("formatVersion", QJsonValue(QString("1")));
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QJsonObject groupsArr;
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for (auto iter = reverseGroupMap.begin(); iter != reverseGroupMap.end(); iter++)
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{
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auto list = iter.value();
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auto name = iter.key();
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QJsonObject groupObj;
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QJsonArray instanceArr;
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groupObj.insert("hidden", QJsonValue(QString("false")));
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for (auto item : list)
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{
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instanceArr.append(QJsonValue(item));
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}
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groupObj.insert("instances", instanceArr);
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groupsArr.insert(name, groupObj);
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}
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toplevel.insert("groups", groupsArr);
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QJsonDocument doc(toplevel);
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try
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{
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FS::write(groupFileName, doc.toJson());
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qDebug() << "Group list saved.";
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}
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catch (const FS::FileSystemException &e)
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{
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qCritical() << "Failed to write instance group file :" << e.cause();
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}
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}
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void InstanceList::loadGroupList()
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{
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qDebug() << "Will load group list now.";
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QSet<QString> groupSet;
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QString groupFileName = m_instDir + "/instgroups.json";
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// if there's no group file, fail
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if (!QFileInfo(groupFileName).exists())
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return;
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QByteArray jsonData;
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try
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{
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jsonData = FS::read(groupFileName);
|
|
}
|
|
catch (const FS::FileSystemException &e)
|
|
{
|
|
qCritical() << "Failed to read instance group file :" << e.cause();
|
|
return;
|
|
}
|
|
|
|
QJsonParseError error;
|
|
QJsonDocument jsonDoc = QJsonDocument::fromJson(jsonData, &error);
|
|
|
|
// if the json was bad, fail
|
|
if (error.error != QJsonParseError::NoError)
|
|
{
|
|
qCritical() << QString("Failed to parse instance group file: %1 at offset %2")
|
|
.arg(error.errorString(), QString::number(error.offset))
|
|
.toUtf8();
|
|
return;
|
|
}
|
|
|
|
// if the root of the json wasn't an object, fail
|
|
if (!jsonDoc.isObject())
|
|
{
|
|
qWarning() << "Invalid group file. Root entry should be an object.";
|
|
return;
|
|
}
|
|
|
|
QJsonObject rootObj = jsonDoc.object();
|
|
|
|
// Make sure the format version matches, otherwise fail.
|
|
if (rootObj.value("formatVersion").toVariant().toInt() != GROUP_FILE_FORMAT_VERSION)
|
|
return;
|
|
|
|
// Get the groups. if it's not an object, fail
|
|
if (!rootObj.value("groups").isObject())
|
|
{
|
|
qWarning() << "Invalid group list JSON: 'groups' should be an object.";
|
|
return;
|
|
}
|
|
|
|
m_groupMap.clear();
|
|
|
|
// Iterate through all the groups.
|
|
QJsonObject groupMapping = rootObj.value("groups").toObject();
|
|
for (QJsonObject::iterator iter = groupMapping.begin(); iter != groupMapping.end(); iter++)
|
|
{
|
|
QString groupName = iter.key();
|
|
|
|
// If not an object, complain and skip to the next one.
|
|
if (!iter.value().isObject())
|
|
{
|
|
qWarning() << QString("Group '%1' in the group list should "
|
|
"be an object.")
|
|
.arg(groupName)
|
|
.toUtf8();
|
|
continue;
|
|
}
|
|
|
|
QJsonObject groupObj = iter.value().toObject();
|
|
if (!groupObj.value("instances").isArray())
|
|
{
|
|
qWarning() << QString("Group '%1' in the group list is invalid. "
|
|
"It should contain an array "
|
|
"called 'instances'.")
|
|
.arg(groupName)
|
|
.toUtf8();
|
|
continue;
|
|
}
|
|
|
|
// keep a list/set of groups for choosing
|
|
groupSet.insert(groupName);
|
|
|
|
// Iterate through the list of instances in the group.
|
|
QJsonArray instancesArray = groupObj.value("instances").toArray();
|
|
|
|
for (QJsonArray::iterator iter2 = instancesArray.begin(); iter2 != instancesArray.end(); iter2++)
|
|
{
|
|
m_groupMap[(*iter2).toString()] = groupName;
|
|
}
|
|
}
|
|
m_groupsLoaded = true;
|
|
m_groups.unite(groupSet);
|
|
qDebug() << "Group list loaded.";
|
|
}
|
|
|
|
void InstanceList::instanceDirContentsChanged(const QString& path)
|
|
{
|
|
Q_UNUSED(path);
|
|
emit instancesChanged();
|
|
}
|
|
|
|
void InstanceList::on_InstFolderChanged(const Setting &setting, QVariant value)
|
|
{
|
|
QString newInstDir = QDir(value.toString()).canonicalPath();
|
|
if(newInstDir != m_instDir)
|
|
{
|
|
if(m_groupsLoaded)
|
|
{
|
|
saveGroupList();
|
|
}
|
|
m_instDir = newInstDir;
|
|
m_groupsLoaded = false;
|
|
emit instancesChanged();
|
|
}
|
|
}
|
|
|
|
class InstanceStaging : public Task
|
|
{
|
|
Q_OBJECT
|
|
const unsigned minBackoff = 1;
|
|
const unsigned maxBackoff = 16;
|
|
public:
|
|
InstanceStaging (
|
|
InstanceList * parent,
|
|
Task * child,
|
|
const QString & stagingPath,
|
|
const QString& instanceName,
|
|
const QString& groupName )
|
|
: backoff(minBackoff, maxBackoff)
|
|
{
|
|
m_parent = parent;
|
|
m_child.reset(child);
|
|
connect(child, &Task::succeeded, this, &InstanceStaging::childSucceded);
|
|
connect(child, &Task::failed, this, &InstanceStaging::childFailed);
|
|
connect(child, &Task::status, this, &InstanceStaging::setStatus);
|
|
connect(child, &Task::progress, this, &InstanceStaging::setProgress);
|
|
m_instanceName = instanceName;
|
|
m_groupName = groupName;
|
|
m_stagingPath = stagingPath;
|
|
m_backoffTimer.setSingleShot(true);
|
|
connect(&m_backoffTimer, &QTimer::timeout, this, &InstanceStaging::childSucceded);
|
|
}
|
|
|
|
virtual ~InstanceStaging() {};
|
|
|
|
|
|
// FIXME/TODO: add ability to abort during instance commit retries
|
|
bool abort() override
|
|
{
|
|
if(m_child && m_child->canAbort())
|
|
{
|
|
return m_child->abort();
|
|
}
|
|
return false;
|
|
}
|
|
bool canAbort() const override
|
|
{
|
|
if(m_child && m_child->canAbort())
|
|
{
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
protected:
|
|
virtual void executeTask() override
|
|
{
|
|
m_child->start();
|
|
}
|
|
QStringList warnings() const override
|
|
{
|
|
return m_child->warnings();
|
|
}
|
|
|
|
private slots:
|
|
void childSucceded()
|
|
{
|
|
unsigned sleepTime = backoff();
|
|
if(m_parent->commitStagedInstance(m_stagingPath, m_instanceName, m_groupName))
|
|
{
|
|
emitSucceeded();
|
|
return;
|
|
}
|
|
// we actually failed, retry?
|
|
if(sleepTime == maxBackoff)
|
|
{
|
|
emitFailed(tr("Failed to commit instance, even after multiple retries. It is being blocked by something."));
|
|
return;
|
|
}
|
|
qDebug() << "Failed to commit instance" << m_instanceName << "Initiating backoff:" << sleepTime;
|
|
m_backoffTimer.start(sleepTime * 500);
|
|
}
|
|
void childFailed(const QString & reason)
|
|
{
|
|
m_parent->destroyStagingPath(m_stagingPath);
|
|
emitFailed(reason);
|
|
}
|
|
|
|
private:
|
|
/*
|
|
* WHY: the whole reason why this uses an exponential backoff retry scheme is antivirus on Windows.
|
|
* Basically, it starts messing things up while MultiMC is extracting/creating instances
|
|
* and causes that horrible failure that is NTFS to lock files in place because they are open.
|
|
*/
|
|
ExponentialSeries backoff;
|
|
QString m_stagingPath;
|
|
InstanceList * m_parent;
|
|
unique_qobject_ptr<Task> m_child;
|
|
QString m_instanceName;
|
|
QString m_groupName;
|
|
QTimer m_backoffTimer;
|
|
};
|
|
|
|
Task * InstanceList::wrapInstanceTask(InstanceTask * task)
|
|
{
|
|
auto stagingPath = getStagedInstancePath();
|
|
task->setStagingPath(stagingPath);
|
|
task->setParentSettings(m_globalSettings);
|
|
return new InstanceStaging(this, task, stagingPath, task->name(), task->group());
|
|
}
|
|
|
|
QString InstanceList::getStagedInstancePath()
|
|
{
|
|
QString key = QUuid::createUuid().toString();
|
|
QString relPath = FS::PathCombine("_MMC_TEMP/" , key);
|
|
QDir rootPath(m_instDir);
|
|
auto path = FS::PathCombine(m_instDir, relPath);
|
|
if(!rootPath.mkpath(relPath))
|
|
{
|
|
return QString();
|
|
}
|
|
return path;
|
|
}
|
|
|
|
bool InstanceList::commitStagedInstance(const QString& path, const QString& instanceName, const QString& groupName)
|
|
{
|
|
QDir dir;
|
|
QString instID = FS::DirNameFromString(instanceName, m_instDir);
|
|
{
|
|
WatchLock lock(m_watcher, m_instDir);
|
|
QString destination = FS::PathCombine(m_instDir, instID);
|
|
if(!dir.rename(path, destination))
|
|
{
|
|
qWarning() << "Failed to move" << path << "to" << destination;
|
|
return false;
|
|
}
|
|
m_groupMap[instID] = groupName;
|
|
instanceSet.insert(instID);
|
|
m_groups.insert(groupName);
|
|
emit instancesChanged();
|
|
}
|
|
saveGroupList();
|
|
return true;
|
|
}
|
|
|
|
bool InstanceList::destroyStagingPath(const QString& keyPath)
|
|
{
|
|
return FS::deletePath(keyPath);
|
|
}
|
|
|
|
#include "InstanceList.moc" |