PrismLauncher/backend/lists/InstanceList.cpp

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/* Copyright 2013 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.
*/
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#include <QDir>
#include <QFile>
#include <QDirIterator>
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#include <QThread>
#include <QTextStream>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonArray>
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#include "lists/InstanceList.h"
#include "BaseInstance.h"
#include "InstanceFactory.h"
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#include "pathutils.h"
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const static int GROUP_FILE_FORMAT_VERSION = 1;
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InstanceList::InstanceList(const QString &instDir, QObject *parent) :
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QObject(parent), m_instDir("instances")
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{
}
void InstanceList::loadGroupList(QMap<QString, QString> & groupMap)
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{
QString groupFileName = m_instDir + "/instgroups.json";
// if there's no group file, fail
if(!QFileInfo(groupFileName).exists())
return;
QFile groupFile(groupFileName);
// if you can't open the file, fail
if (!groupFile.open(QIODevice::ReadOnly))
{
// An error occurred. Ignore it.
qDebug("Failed to read instance group file.");
return;
}
QTextStream in(&groupFile);
QString jsonStr = in.readAll();
groupFile.close();
QJsonParseError error;
QJsonDocument jsonDoc = QJsonDocument::fromJson(jsonStr.toUtf8(), &error);
// if the json was bad, fail
if (error.error != QJsonParseError::NoError)
{
qWarning(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;
}
// 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;
}
// 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;
}
}
}
InstanceList::InstListError InstanceList::loadList()
{
// load the instance groups
QMap<QString, QString> groupMap;
loadGroupList(groupMap);
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m_instances.clear();
QDir dir(m_instDir);
QDirIterator iter(dir);
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while (iter.hasNext())
{
QString subDir = iter.next();
if (!QFileInfo(PathCombine(subDir, "instance.cfg")).exists())
continue;
BaseInstance *instPtr = NULL;
auto &loader = InstanceFactory::get();
auto error = loader.loadInstance(instPtr, subDir);
switch(error)
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{
case InstanceFactory::NoLoadError:
break;
case InstanceFactory::NotAnInstance:
break;
}
if (error != InstanceFactory::NoLoadError &&
error != InstanceFactory::NotAnInstance)
{
QString errorMsg = QString("Failed to load instance %1: ").
arg(QFileInfo(subDir).baseName()).toUtf8();
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switch (error)
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{
default:
errorMsg += QString("Unknown instance loader error %1").
arg(error);
break;
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}
qDebug(errorMsg.toUtf8());
}
else if (!instPtr)
{
qDebug(QString("Error loading instance %1. Instance loader returned null.").
arg(QFileInfo(subDir).baseName()).toUtf8());
}
else
{
QSharedPointer<BaseInstance> inst(instPtr);
auto iter = groupMap.find(inst->id());
if(iter != groupMap.end())
{
inst->setGroup((*iter));
}
qDebug(QString("Loaded instance %1").arg(inst->name()).toUtf8());
inst->setParent(this);
m_instances.append(inst);
connect(instPtr, SIGNAL(propertiesChanged(BaseInstance*)),this, SLOT(propertiesChanged(BaseInstance*)));
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}
}
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emit invalidated();
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return NoError;
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}
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/// Clear all instances. Triggers notifications.
void InstanceList::clear()
{
m_instances.clear();
emit invalidated();
};
/// Add an instance. Triggers notifications, returns the new index
int InstanceList::add(InstancePtr t)
{
m_instances.append(t);
emit instanceAdded(count() - 1);
return count() - 1;
}
InstancePtr InstanceList::getInstanceById(QString instId)
{
QListIterator<InstancePtr> iter(m_instances);
InstancePtr inst;
while(iter.hasNext())
{
inst = iter.next();
if (inst->id() == instId)
break;
}
if (inst->id() != instId)
return InstancePtr();
else
return iter.peekPrevious();
}
void InstanceList::propertiesChanged(BaseInstance * inst)
{
for(int i = 0; i < m_instances.count(); i++)
{
if(inst == m_instances[i].data())
{
emit instanceChanged(i);
break;
}
}
}