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diff --git a/backend/OneSixUpdate.h b/backend/OneSixUpdate.h
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+++ b/backend/OneSixUpdate.h
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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.
+ */
+
+#pragma once
+
+#include <QObject>
+
+#include <QList>
+
+#include <QNetworkAccessManager>
+#include <QUrl>
+#include "dlqueue.h"
+
+#include "tasks/Task.h"
+#include "libmmc_config.h"
+
+class MinecraftVersion;
+class BaseInstance;
+
+/*!
+ * The game update task is the task that handles downloading instances' files.
+ */
+class LIBMULTIMC_EXPORT OneSixUpdate : public Task
+{
+	Q_OBJECT
+public:
+	explicit OneSixUpdate(BaseInstance *inst, QObject *parent = 0);
+	
+	virtual void executeTask();
+	
+public slots:
+	virtual void error(const QString &msg);
+	
+private slots:
+	void updateDownloadProgress(qint64 current, qint64 total);
+	
+	void versionFileFinished();
+	void versionFileFailed();
+	
+	void jarlibFinished();
+	void jarlibFailed();
+	
+signals:
+	/*!
+	 * \brief Signal emitted when the game update is complete.
+	 * \param response The login response received from login task.
+	 */
+	void gameUpdateComplete();
+	
+	/*!
+	 * \brief Signal emitted if an error occurrs during the update.
+	 * \param errorMsg An error message to be displayed to the user.
+	 */
+	void gameUpdateError(const QString &errorMsg);
+	
+private:
+	BaseInstance *m_inst;
+
+	QString m_subStatusMsg;
+	
+	JobListPtr legacyDownloadJob;
+	JobListPtr specificVersionDownloadJob;
+	JobListPtr jarlibDownloadJob;
+	JobListQueue download_queue;
+	
+	// target version, determined during this task
+	MinecraftVersion *targetVersion;
+};
+
+