1 files changed, 232 insertions, 0 deletions
diff --git a/backend/lists/InstanceList.cpp b/backend/lists/InstanceList.cpp
new file mode 100644
index 00000000..101d52c5
--- /dev/null
+++ b/backend/lists/InstanceList.cpp
@@ -0,0 +1,232 @@
+/* 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.
+ */
+
+#include <QDir>
+#include <QFile>
+#include <QDirIterator>
+#include <QThread>
+#include <QTextStream>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonArray>
+
+#include "lists/InstanceList.h"
+#include "BaseInstance.h"
+#include "InstanceFactory.h"
+
+#include "pathutils.h"
+
+const static int GROUP_FILE_FORMAT_VERSION = 1;
+
+InstanceList::InstanceList(const QString &instDir, QObject *parent) :
+	QObject(parent), m_instDir("instances")
+{
+	
+}
+
+void InstanceList::loadGroupList(QMap<QString, QString> & groupMap)
+{
+	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);
+	
+	m_instances.clear();
+	QDir dir(m_instDir);
+	QDirIterator iter(dir);
+	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)
+		{
+			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();
+			
+			switch (error)
+			{
+			default:
+				errorMsg += QString("Unknown instance loader error %1").
+						arg(error);
+				break;
+			}
+			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*)));
+		}
+	}
+	emit invalidated();
+	return NoError;
+}
+
+/// 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;
+		}
+	}
+}