diff options
Diffstat (limited to 'api/logic/InstanceList.cpp')
| -rw-r--r-- | api/logic/InstanceList.cpp | 444 |
1 files changed, 425 insertions, 19 deletions
diff --git a/api/logic/InstanceList.cpp b/api/logic/InstanceList.cpp index 7e2c03a9..616d2887 100644 --- a/api/logic/InstanceList.cpp +++ b/api/logic/InstanceList.cpp @@ -14,23 +14,50 @@ */ #include <QDir> +#include <QDirIterator> #include <QSet> #include <QFile> #include <QThread> #include <QTextStream> #include <QXmlStreamReader> +#include <QTimer> #include <QDebug> +#include <QFileSystemWatcher> +#include <QUuid> +#include <QJsonArray> +#include <QJsonDocument> #include "InstanceList.h" #include "BaseInstance.h" - -#include "FolderInstanceProvider.h" +#include "InstanceTask.h" +#include "settings/INISettingsObject.h" +#include "minecraft/legacy/LegacyInstance.h" +#include "NullInstance.h" +#include "minecraft/MinecraftInstance.h" #include "FileSystem.h" +#include "ExponentialSeries.h" +#include "WatchLock.h" + +const static int GROUP_FILE_FORMAT_VERSION = 1; -InstanceList::InstanceList(QObject *parent) - : QAbstractListModel(parent) +InstanceList::InstanceList(SettingsObjectPtr settings, const QString & instDir, QObject *parent) + : QAbstractListModel(parent), m_globalSettings(settings) { resumeWatch(); + // Create aand normalize path + if (!QDir::current().exists(instDir)) + { + QDir::current().mkpath(instDir); + } + + connect(this, &InstanceList::instancesChanged, this, &InstanceList::providerUpdated); + connect(this, &InstanceList::groupsChanged, this, &InstanceList::groupsPublished); + + // NOTE: canonicalPath requires the path to exist. Do not move this above the creation block! + m_instDir = QDir(instDir).canonicalPath(); + m_watcher = new QFileSystemWatcher(this); + connect(m_watcher, &QFileSystemWatcher::directoryChanged, this, &InstanceList::instanceDirContentsChanged); + m_watcher->addPath(m_instDir); } InstanceList::~InstanceList() @@ -155,13 +182,44 @@ static QMap<InstanceId, InstanceLocator> getIdMapping(const QList<InstancePtr> & return out; } +QList< InstanceId > InstanceList::discoverInstances() +{ + qDebug() << "Discovering instances in" << m_instDir; + QList<InstanceId> out; + QDirIterator iter(m_instDir, QDir::Dirs | QDir::NoDot | QDir::NoDotDot | QDir::Readable | QDir::Hidden, QDirIterator::FollowSymlinks); + while (iter.hasNext()) + { + QString subDir = iter.next(); + QFileInfo dirInfo(subDir); + if (!QFileInfo(FS::PathCombine(subDir, "instance.cfg")).exists()) + continue; + // if it is a symlink, ignore it if it goes to the instance folder + if(dirInfo.isSymLink()) + { + QFileInfo targetInfo(dirInfo.symLinkTarget()); + QFileInfo instDirInfo(m_instDir); + if(targetInfo.canonicalPath() == instDirInfo.canonicalFilePath()) + { + qDebug() << "Ignoring symlink" << subDir << "that leads into the instances folder"; + continue; + } + } + auto id = dirInfo.fileName(); + out.append(id); + qDebug() << "Found instance ID" << id; + } + instanceSet = out.toSet(); + m_instancesProbed = true; + return out; +} + InstanceList::InstListError InstanceList::loadList() { auto existingIds = getIdMapping(m_instances); QList<InstancePtr> newList; - for(auto & id: m_provider->discoverInstances()) + for(auto & id: discoverInstances()) { if(existingIds.contains(id)) { @@ -171,7 +229,7 @@ InstanceList::InstListError InstanceList::loadList() } else { - InstancePtr instPtr = m_provider->loadInstance(id); + InstancePtr instPtr = loadInstance(id); if(instPtr) { newList.append(instPtr); @@ -275,12 +333,6 @@ void InstanceList::suspendWatch() void InstanceList::providerUpdated() { - auto provider = dynamic_cast<FolderInstanceProvider *>(QObject::sender()); - if(!provider) - { - qWarning() << "InstanceList::providerUpdated triggered by a non-provider"; - return; - } m_dirty = true; if(m_watchLevel == 1) { @@ -293,13 +345,6 @@ void InstanceList::groupsPublished(QSet<QString> newGroups) m_groups.unite(newGroups); } -void InstanceList::addInstanceProvider(FolderInstanceProvider* provider) -{ - connect(provider, &FolderInstanceProvider::instancesChanged, this, &InstanceList::providerUpdated); - connect(provider, &FolderInstanceProvider::groupsChanged, this, &InstanceList::groupsPublished); - m_provider = provider; -} - InstancePtr InstanceList::getInstanceById(QString instId) const { if(instId.isEmpty()) @@ -340,3 +385,364 @@ void InstanceList::propertiesChanged(BaseInstance *inst) emit dataChanged(index(i), index(i)); } } + +InstancePtr InstanceList::loadInstance(const InstanceId& id) +{ + if(!m_groupsLoaded) + { + loadGroupList(); + } + + auto instanceRoot = FS::PathCombine(m_instDir, id); + auto instanceSettings = std::make_shared<INISettingsObject>(FS::PathCombine(instanceRoot, "instance.cfg")); + InstancePtr inst; + + instanceSettings->registerSetting("InstanceType", "Legacy"); + + QString inst_type = instanceSettings->get("InstanceType").toString(); + + if (inst_type == "OneSix" || inst_type == "Nostalgia") + { + inst.reset(new MinecraftInstance(m_globalSettings, instanceSettings, instanceRoot)); + } + else if (inst_type == "Legacy") + { + inst.reset(new LegacyInstance(m_globalSettings, instanceSettings, instanceRoot)); + } + else + { + inst.reset(new NullInstance(m_globalSettings, instanceSettings, instanceRoot)); + } + inst->init(); + auto iter = groupMap.find(id); + if (iter != groupMap.end()) + { + inst->setGroupInitial((*iter)); + } + connect(inst.get(), &BaseInstance::groupChanged, this, &InstanceList::groupChanged); + qDebug() << "Loaded instance " << inst->name() << " from " << inst->instanceRoot(); + return inst; +} + +void InstanceList::saveGroupList() +{ + qDebug() << "Will save group list now."; + if(!m_instancesProbed) + { + qDebug() << "Group saving prevented because we don't know the full list of instances yet."; + return; + } + WatchLock foo(m_watcher, m_instDir); + QString groupFileName = m_instDir + "/instgroups.json"; + QMap<QString, QSet<QString>> reverseGroupMap; + for (auto iter = groupMap.begin(); iter != groupMap.end(); iter++) + { + QString id = iter.key(); + QString group = iter.value(); + if (group.isEmpty()) + continue; + if(!instanceSet.contains(id)) + { + qDebug() << "Skipping saving missing instance" << id << "to groups list."; + continue; + } + + if (!reverseGroupMap.count(group)) + { + QSet<QString> set; + set.insert(id); + reverseGroupMap[group] = set; + } + else + { + QSet<QString> &set = reverseGroupMap[group]; + set.insert(id); + } + } + QJsonObject toplevel; + toplevel.insert("formatVersion", QJsonValue(QString("1"))); + QJsonObject groupsArr; + for (auto iter = reverseGroupMap.begin(); iter != reverseGroupMap.end(); iter++) + { + auto list = iter.value(); + auto name = iter.key(); + QJsonObject groupObj; + QJsonArray instanceArr; + groupObj.insert("hidden", QJsonValue(QString("false"))); + for (auto item : list) + { + instanceArr.append(QJsonValue(item)); + } + groupObj.insert("instances", instanceArr); + groupsArr.insert(name, groupObj); + } + toplevel.insert("groups", groupsArr); + QJsonDocument doc(toplevel); + try + { + FS::write(groupFileName, doc.toJson()); + qDebug() << "Group list saved."; + } + catch (const FS::FileSystemException &e) + { + qCritical() << "Failed to write instance group file :" << e.cause(); + } +} + +void InstanceList::loadGroupList() +{ + qDebug() << "Will load group list now."; + QSet<QString> groupSet; + + QString groupFileName = m_instDir + "/instgroups.json"; + + // if there's no group file, fail + if (!QFileInfo(groupFileName).exists()) + return; + + QByteArray jsonData; + try + { + 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; + } + + 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++) + { + groupMap[(*iter2).toString()] = groupName; + } + } + m_groupsLoaded = true; + emit groupsChanged(groupSet); + qDebug() << "Group list loaded."; +} + +void InstanceList::groupChanged() +{ + // save the groups. save all of them. + auto instance = (BaseInstance *) QObject::sender(); + auto id = instance->id(); + groupMap[id] = instance->group(); + emit groupsChanged({instance->group()}); + saveGroupList(); +} + + +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() {}; + +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; + } + groupMap[instID] = groupName; + instanceSet.insert(instID); + emit groupsChanged({groupName}); + emit instancesChanged(); + } + saveGroupList(); + return true; +} + +bool InstanceList::destroyStagingPath(const QString& keyPath) +{ + return FS::deletePath(keyPath); +} + +#include "InstanceList.moc"
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