PrismLauncher/libmultimc/src/instancelist.cpp

/* 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 "include/instancelist.h"

#include <QDir>
#include <QFile>
#include <QDirIterator>
#include <QThread>

#include "include/instance.h"
#include "include/instanceloader.h"

#include "pathutils.h"


InstanceList::InstanceList(const QString &instDir, QObject *parent) :
	QObject(parent), m_instDir("instances")
{
	
}

InstanceList::InstListError InstanceList::loadList()
{
	QDir dir(m_instDir);
	QDirIterator iter(dir);
	m_instances.clear();
	while (iter.hasNext())
	{
		QString subDir = iter.next();
		if (QFileInfo(PathCombine(subDir, "instance.cfg")).exists())
		{
			Instance *instPtr = NULL;
			
			InstanceLoader::InstTypeError error = InstanceLoader::get().
					loadInstance(instPtr, subDir);
			
			if (error != InstanceLoader::NoError &&
					 error != InstanceLoader::NotAnInstance)
			{
				QString errorMsg = QString("Failed to load instance %1: ").
						arg(QFileInfo(subDir).baseName()).toUtf8();
				
				switch (error)
				{
				case InstanceLoader::TypeNotRegistered:
					errorMsg += "Instance type not found.";
					break;
					
				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<Instance> inst(instPtr);
				
				qDebug(QString("Loaded instance %1").arg(inst->name()).toUtf8());
				inst->setParent(this);
				m_instances.append(inst);
			}
		}
	}
	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();
}