NOISSUE move files into paths that make more sense

6 files changed, 1400 insertions, 0 deletions

diff --git a/logic/minecraft/legacy/LegacyInstance.cpp b/logic/minecraft/legacy/LegacyInstance.cpp
new file mode 100644
index 00000000..056079f6
--- /dev/null
+++ b/logic/minecraft/legacy/LegacyInstance.cpp
@@ -0,0 +1,455 @@
+/* Copyright 2013-2015 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 <QFileInfo>
+#include <QDir>
+#include <QImage>
+#include <settings/Setting.h>
+
+#include "LegacyInstance.h"
+
+#include "minecraft/legacy/LegacyUpdate.h"
+#include "icons/IconList.h"
+#include "launch/LaunchTask.h"
+#include <launch/steps/LaunchMinecraft.h>
+#include <launch/steps/PostLaunchCommand.h>
+#include <launch/steps/ModMinecraftJar.h>
+#include <launch/steps/Update.h>
+#include <launch/steps/PreLaunchCommand.h>
+#include <launch/steps/TextPrint.h>
+#include <launch/steps/CheckJava.h>
+#include "minecraft/ModList.h"
+#include "minecraft/WorldList.h"
+#include <MMCZip.h>
+#include <FileSystem.h>
+
+LegacyInstance::LegacyInstance(SettingsObjectPtr globalSettings, SettingsObjectPtr settings, const QString &rootDir)
+	: MinecraftInstance(globalSettings, settings, rootDir)
+{
+	m_lwjglFolderSetting = globalSettings->getSetting("LWJGLDir");
+	settings->registerSetting("NeedsRebuild", true);
+	settings->registerSetting("ShouldUpdate", false);
+	settings->registerSetting("JarVersion", "Unknown");
+	settings->registerSetting("LwjglVersion", "2.9.0");
+	settings->registerSetting("IntendedJarVersion", "");
+	/*
+	 * custom base jar has no default. it is determined in code... see the accessor methods for
+	 *it
+	 *
+	 * for instances that DO NOT have the CustomBaseJar setting (legacy instances),
+	 * [.]minecraft/bin/mcbackup.jar is the default base jar
+	 */
+	settings->registerSetting("UseCustomBaseJar", true);
+	settings->registerSetting("CustomBaseJar", "");
+}
+
+QString LegacyInstance::baseJar() const
+{
+	bool customJar = m_settings->get("UseCustomBaseJar").toBool();
+	if (customJar)
+	{
+		return customBaseJar();
+	}
+	else
+		return defaultBaseJar();
+}
+
+QString LegacyInstance::customBaseJar() const
+{
+	QString value = m_settings->get("CustomBaseJar").toString();
+	if (value.isNull() || value.isEmpty())
+	{
+		return defaultCustomBaseJar();
+	}
+	return value;
+}
+
+void LegacyInstance::setCustomBaseJar(QString val)
+{
+	if (val.isNull() || val.isEmpty() || val == defaultCustomBaseJar())
+		m_settings->reset("CustomBaseJar");
+	else
+		m_settings->set("CustomBaseJar", val);
+}
+
+void LegacyInstance::setShouldUseCustomBaseJar(bool val)
+{
+	m_settings->set("UseCustomBaseJar", val);
+}
+
+bool LegacyInstance::shouldUseCustomBaseJar() const
+{
+	return m_settings->get("UseCustomBaseJar").toBool();
+}
+
+
+std::shared_ptr<Task> LegacyInstance::createUpdateTask()
+{
+	// make sure the jar mods list is initialized by asking for it.
+	auto list = jarModList();
+	// create an update task
+	return std::shared_ptr<Task>(new LegacyUpdate(this, this));
+}
+
+std::shared_ptr<LaunchTask> LegacyInstance::createLaunchTask(AuthSessionPtr session)
+{
+	QString launchScript;
+	QIcon icon = ENV.icons()->getIcon(iconKey());
+	auto pixmap = icon.pixmap(128, 128);
+	pixmap.save(FS::PathCombine(minecraftRoot(), "icon.png"), "PNG");
+
+	// create the launch script
+	{
+		// window size
+		QString windowParams;
+		if (settings()->get("LaunchMaximized").toBool())
+			windowParams = "max";
+		else
+			windowParams = QString("%1x%2")
+							   .arg(settings()->get("MinecraftWinWidth").toInt())
+							   .arg(settings()->get("MinecraftWinHeight").toInt());
+
+		QString lwjgl = QDir(m_lwjglFolderSetting->get().toString() + "/" + lwjglVersion())
+							.absolutePath();
+		launchScript += "userName " + session->player_name + "\n";
+		launchScript += "sessionId " + session->session + "\n";
+		launchScript += "windowTitle " + windowTitle() + "\n";
+		launchScript += "windowParams " + windowParams + "\n";
+		launchScript += "lwjgl " + lwjgl + "\n";
+		launchScript += "launcher legacy\n";
+	}
+	auto process = LaunchTask::create(std::dynamic_pointer_cast<MinecraftInstance>(getSharedPtr()));
+	auto pptr = process.get();
+
+	// print a header
+	{
+		process->appendStep(std::make_shared<TextPrint>(pptr, "Minecraft folder is:\n" + minecraftRoot() + "\n\n", MessageLevel::MultiMC));
+	}
+	{
+		auto step = std::make_shared<CheckJava>(pptr);
+		process->appendStep(step);
+	}
+	// run pre-launch command if that's needed
+	if(getPreLaunchCommand().size())
+	{
+		auto step = std::make_shared<PreLaunchCommand>(pptr);
+		step->setWorkingDirectory(minecraftRoot());
+		process->appendStep(step);
+	}
+	// if we aren't in offline mode,.
+	if(session->status != AuthSession::PlayableOffline)
+	{
+		process->appendStep(std::make_shared<Update>(pptr));
+	}
+	// if there are any jar mods
+	if(getJarMods().size())
+	{
+		auto step = std::make_shared<ModMinecraftJar>(pptr);
+		process->appendStep(step);
+	}
+	// actually launch the game
+	{
+		auto step = std::make_shared<LaunchMinecraft>(pptr);
+		step->setWorkingDirectory(minecraftRoot());
+		step->setLaunchScript(launchScript);
+		process->appendStep(step);
+	}
+	// run post-exit command if that's needed
+	if(getPostExitCommand().size())
+	{
+		auto step = std::make_shared<PostLaunchCommand>(pptr);
+		step->setWorkingDirectory(minecraftRoot());
+		process->appendStep(step);
+	}
+	if (session)
+	{
+		process->setCensorFilter(createCensorFilterFromSession(session));
+	}
+	return process;
+}
+
+std::shared_ptr<Task> LegacyInstance::createJarModdingTask()
+{
+	class JarModTask : public Task
+	{
+	public:
+		explicit JarModTask(std::shared_ptr<LegacyInstance> inst) : Task(nullptr), m_inst(inst)
+		{
+		}
+		virtual void executeTask()
+		{
+			if (!m_inst->shouldRebuild())
+			{
+				emitSucceeded();
+				return;
+			}
+
+			// Get the mod list
+			auto modList = m_inst->getJarMods();
+
+			QFileInfo runnableJar(m_inst->runnableJar());
+			QFileInfo baseJar(m_inst->baseJar());
+			bool base_is_custom = m_inst->shouldUseCustomBaseJar();
+
+			// Nothing to do if there are no jar mods to install, no backup and just the mc jar
+			if (base_is_custom)
+			{
+				// yes, this can happen if the instance only has the runnable jar and not the base jar
+				// it *could* be assumed that such an instance is vanilla, but that wouldn't be safe
+				// because that's not something mmc4 guarantees
+				if (runnableJar.isFile() && !baseJar.exists() && modList.empty())
+				{
+					m_inst->setShouldRebuild(false);
+					emitSucceeded();
+					return;
+				}
+
+				setStatus(tr("Installing mods: Backing up minecraft.jar ..."));
+				if (!baseJar.exists() && !QFile::copy(runnableJar.filePath(), baseJar.filePath()))
+				{
+					emitFailed("It seems both the active and base jar are gone. A fresh base jar will "
+							"be used on next run.");
+					m_inst->setShouldRebuild(true);
+					m_inst->setShouldUpdate(true);
+					m_inst->setShouldUseCustomBaseJar(false);
+					return;
+				}
+			}
+
+			if (!baseJar.exists())
+			{
+				emitFailed("The base jar " + baseJar.filePath() + " does not exist");
+				return;
+			}
+
+			if (runnableJar.exists() && !QFile::remove(runnableJar.filePath()))
+			{
+				emitFailed("Failed to delete old minecraft.jar");
+				return;
+			}
+
+			setStatus(tr("Installing mods: Opening minecraft.jar ..."));
+
+			QString outputJarPath = runnableJar.filePath();
+			QString inputJarPath = baseJar.filePath();
+
+			if(!MMCZip::createModdedJar(inputJarPath, outputJarPath, modList))
+			{
+				emitFailed(tr("Failed to create the custom Minecraft jar file."));
+				return;
+			}
+			m_inst->setShouldRebuild(false);
+			// inst->UpdateVersion(true);
+			emitSucceeded();
+			return;
+
+		}
+		std::shared_ptr<LegacyInstance> m_inst;
+	};
+	return std::make_shared<JarModTask>(std::dynamic_pointer_cast<LegacyInstance>(shared_from_this()));
+}
+
+void LegacyInstance::cleanupAfterRun()
+{
+	// FIXME: delete the launcher and icons and whatnot.
+}
+
+std::shared_ptr<ModList> LegacyInstance::coreModList() const
+{
+	if (!core_mod_list)
+	{
+		core_mod_list.reset(new ModList(coreModsDir()));
+	}
+	core_mod_list->update();
+	return core_mod_list;
+}
+
+std::shared_ptr<ModList> LegacyInstance::jarModList() const
+{
+	if (!jar_mod_list)
+	{
+		auto list = new ModList(jarModsDir(), modListFile());
+		connect(list, SIGNAL(changed()), SLOT(jarModsChanged()));
+		jar_mod_list.reset(list);
+	}
+	jar_mod_list->update();
+	return jar_mod_list;
+}
+
+QList<Mod> LegacyInstance::getJarMods() const
+{
+	return jarModList()->allMods();
+}
+
+void LegacyInstance::jarModsChanged()
+{
+	qDebug() << "Jar mods of instance " << name() << " have changed. Jar will be rebuilt.";
+	setShouldRebuild(true);
+}
+
+std::shared_ptr<ModList> LegacyInstance::loaderModList() const
+{
+	if (!loader_mod_list)
+	{
+		loader_mod_list.reset(new ModList(loaderModsDir()));
+	}
+	loader_mod_list->update();
+	return loader_mod_list;
+}
+
+std::shared_ptr<ModList> LegacyInstance::texturePackList() const
+{
+	if (!texture_pack_list)
+	{
+		texture_pack_list.reset(new ModList(texturePacksDir()));
+	}
+	texture_pack_list->update();
+	return texture_pack_list;
+}
+
+std::shared_ptr<WorldList> LegacyInstance::worldList() const
+{
+	if (!m_world_list)
+	{
+		m_world_list.reset(new WorldList(savesDir()));
+	}
+	return m_world_list;
+}
+
+QString LegacyInstance::jarModsDir() const
+{
+	return FS::PathCombine(instanceRoot(), "instMods");
+}
+
+QString LegacyInstance::binDir() const
+{
+	return FS::PathCombine(minecraftRoot(), "bin");
+}
+
+QString LegacyInstance::libDir() const
+{
+	return FS::PathCombine(minecraftRoot(), "lib");
+}
+
+QString LegacyInstance::savesDir() const
+{
+	return FS::PathCombine(minecraftRoot(), "saves");
+}
+
+QString LegacyInstance::loaderModsDir() const
+{
+	return FS::PathCombine(minecraftRoot(), "mods");
+}
+
+QString LegacyInstance::coreModsDir() const
+{
+	return FS::PathCombine(minecraftRoot(), "coremods");
+}
+
+QString LegacyInstance::resourceDir() const
+{
+	return FS::PathCombine(minecraftRoot(), "resources");
+}
+QString LegacyInstance::texturePacksDir() const
+{
+	return FS::PathCombine(minecraftRoot(), "texturepacks");
+}
+
+QString LegacyInstance::runnableJar() const
+{
+	return FS::PathCombine(binDir(), "minecraft.jar");
+}
+
+QString LegacyInstance::modListFile() const
+{
+	return FS::PathCombine(instanceRoot(), "modlist");
+}
+
+QString LegacyInstance::instanceConfigFolder() const
+{
+	return FS::PathCombine(minecraftRoot(), "config");
+}
+
+bool LegacyInstance::shouldRebuild() const
+{
+	return m_settings->get("NeedsRebuild").toBool();
+}
+
+void LegacyInstance::setShouldRebuild(bool val)
+{
+	m_settings->set("NeedsRebuild", val);
+}
+
+QString LegacyInstance::currentVersionId() const
+{
+	return m_settings->get("JarVersion").toString();
+}
+
+QString LegacyInstance::lwjglVersion() const
+{
+	return m_settings->get("LwjglVersion").toString();
+}
+
+void LegacyInstance::setLWJGLVersion(QString val)
+{
+	m_settings->set("LwjglVersion", val);
+}
+
+QString LegacyInstance::intendedVersionId() const
+{
+	return m_settings->get("IntendedJarVersion").toString();
+}
+
+bool LegacyInstance::setIntendedVersionId(QString version)
+{
+	settings()->set("IntendedJarVersion", version);
+	setShouldUpdate(true);
+	return true;
+}
+
+bool LegacyInstance::shouldUpdate() const
+{
+	QVariant var = settings()->get("ShouldUpdate");
+	if (!var.isValid() || var.toBool() == false)
+	{
+		return intendedVersionId() != currentVersionId();
+	}
+	return true;
+}
+
+void LegacyInstance::setShouldUpdate(bool val)
+{
+	settings()->set("ShouldUpdate", val);
+}
+
+QString LegacyInstance::defaultBaseJar() const
+{
+	return "versions/" + intendedVersionId() + "/" + intendedVersionId() + ".jar";
+}
+
+QString LegacyInstance::defaultCustomBaseJar() const
+{
+	return FS::PathCombine(binDir(), "mcbackup.jar");
+}
+
+QString LegacyInstance::lwjglFolder() const
+{
+	return m_lwjglFolderSetting->get().toString();
+}
+
+QString LegacyInstance::typeName() const
+{
+	return tr("Legacy");
+}
diff --git a/logic/minecraft/legacy/LegacyInstance.h b/logic/minecraft/legacy/LegacyInstance.h
new file mode 100644
index 00000000..a2ab86de
--- /dev/null
+++ b/logic/minecraft/legacy/LegacyInstance.h
@@ -0,0 +1,135 @@
+/* Copyright 2013-2015 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 "minecraft/MinecraftInstance.h"
+
+#include "multimc_logic_export.h"
+
+class ModList;
+class Task;
+
+class MULTIMC_LOGIC_EXPORT LegacyInstance : public MinecraftInstance
+{
+	Q_OBJECT
+public:
+
+	explicit LegacyInstance(SettingsObjectPtr globalSettings, SettingsObjectPtr settings, const QString &rootDir);
+
+	virtual void init() override {};
+
+	/// Path to the instance's minecraft.jar
+	QString runnableJar() const;
+
+	//! Path to the instance's modlist file.
+	QString modListFile() const;
+
+	/*
+	////// Edit Instance Dialog stuff //////
+	virtual QList<BasePage *> getPages();
+	virtual QString dialogTitle();
+	*/
+
+	//////  Mod Lists  //////
+	std::shared_ptr<ModList> jarModList() const ;
+	virtual QList< Mod > getJarMods() const override;
+	std::shared_ptr<ModList> coreModList() const;
+	std::shared_ptr<ModList> loaderModList() const;
+	std::shared_ptr<ModList> texturePackList() const override;
+	std::shared_ptr<WorldList> worldList() const override;
+
+	////// Directories //////
+	QString libDir() const;
+	QString savesDir() const;
+	QString texturePacksDir() const;
+	QString jarModsDir() const;
+	QString binDir() const;
+	QString loaderModsDir() const;
+	QString coreModsDir() const;
+	QString resourceDir() const;
+	virtual QString instanceConfigFolder() const override;
+
+		/// Get the curent base jar of this instance. By default, it's the
+	/// versions/$version/$version.jar
+	QString baseJar() const;
+
+	/// the default base jar of this instance
+	QString defaultBaseJar() const;
+	/// the default custom base jar of this instance
+	QString defaultCustomBaseJar() const;
+
+	/*!
+	 * Whether or not custom base jar is used
+	 */
+	bool shouldUseCustomBaseJar() const;
+	void setShouldUseCustomBaseJar(bool val);
+
+	/*!
+	 * The value of the custom base jar
+	 */
+	QString customBaseJar() const;
+	void setCustomBaseJar(QString val);
+
+	/*!
+	 * Whether or not the instance's minecraft.jar needs to be rebuilt.
+	 * If this is true, when the instance launches, its jar mods will be
+	 * re-added to a fresh minecraft.jar file.
+	 */
+	bool shouldRebuild() const;
+	void setShouldRebuild(bool val);
+
+	virtual QString currentVersionId() const override;
+
+	//! The version of LWJGL that this instance uses.
+	QString lwjglVersion() const;
+
+	//! Where the lwjgl versions foor this instance can be found... HACK HACK HACK
+	QString lwjglFolder() const;
+
+	/// st the version of LWJGL libs this instance will use
+	void setLWJGLVersion(QString val);
+
+	virtual QString intendedVersionId() const override;
+	virtual bool setIntendedVersionId(QString version) override;
+
+	virtual QSet<QString> traits() override
+	{
+		return {"legacy-instance", "texturepacks"};
+	};
+
+	virtual bool shouldUpdate() const override;
+	virtual void setShouldUpdate(bool val) override;
+	virtual std::shared_ptr<Task> createUpdateTask() override;
+
+	virtual std::shared_ptr<LaunchTask> createLaunchTask(AuthSessionPtr account) override;
+
+	virtual std::shared_ptr<Task> createJarModdingTask() override;
+
+	virtual void cleanupAfterRun() override;
+
+	virtual QString typeName() const override;
+
+protected:
+	mutable std::shared_ptr<ModList> jar_mod_list;
+	mutable std::shared_ptr<ModList> core_mod_list;
+	mutable std::shared_ptr<ModList> loader_mod_list;
+	mutable std::shared_ptr<ModList> texture_pack_list;
+	mutable std::shared_ptr<WorldList> m_world_list;
+	std::shared_ptr<Setting> m_lwjglFolderSetting;
+protected
+slots:
+	virtual void jarModsChanged();
+};
diff --git a/logic/minecraft/legacy/LegacyUpdate.cpp b/logic/minecraft/legacy/LegacyUpdate.cpp
new file mode 100644
index 00000000..af787f8c
--- /dev/null
+++ b/logic/minecraft/legacy/LegacyUpdate.cpp
@@ -0,0 +1,395 @@
+/* Copyright 2013-2015 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 <QStringList>
+#include <quazip.h>
+#include <quazipfile.h>
+#include <QDebug>
+
+#include "Env.h"
+#include "BaseInstance.h"
+#include "net/URLConstants.h"
+#include "MMCZip.h"
+
+#include "LegacyUpdate.h"
+
+#include "LwjglVersionList.h"
+#include "minecraft/MinecraftVersionList.h"
+#include "minecraft/ModList.h"
+#include "LegacyInstance.h"
+#include <FileSystem.h>
+
+LegacyUpdate::LegacyUpdate(BaseInstance *inst, QObject *parent) : Task(parent), m_inst(inst)
+{
+}
+
+void LegacyUpdate::executeTask()
+{
+	fmllibsStart();
+}
+
+void LegacyUpdate::fmllibsStart()
+{
+	// Get the mod list
+	LegacyInstance *inst = (LegacyInstance *)m_inst;
+	auto modList = inst->jarModList();
+
+	bool forge_present = false;
+
+	QString version = inst->intendedVersionId();
+	auto & fmlLibsMapping = g_VersionFilterData.fmlLibsMapping;
+	if (!fmlLibsMapping.contains(version))
+	{
+		lwjglStart();
+		return;
+	}
+
+	auto &libList = fmlLibsMapping[version];
+
+	// determine if we need some libs for FML or forge
+	setStatus(tr("Checking for FML libraries..."));
+	for (unsigned i = 0; i < modList->size(); i++)
+	{
+		auto &mod = modList->operator[](i);
+
+		// do not use disabled mods.
+		if (!mod.enabled())
+			continue;
+
+		if (mod.type() != Mod::MOD_ZIPFILE)
+			continue;
+
+		if (mod.mmc_id().contains("forge", Qt::CaseInsensitive))
+		{
+			forge_present = true;
+			break;
+		}
+		if (mod.mmc_id().contains("fml", Qt::CaseInsensitive))
+		{
+			forge_present = true;
+			break;
+		}
+	}
+	// we don't...
+	if (!forge_present)
+	{
+		lwjglStart();
+		return;
+	}
+
+	// now check the lib folder inside the instance for files.
+	for (auto &lib : libList)
+	{
+		QFileInfo libInfo(FS::PathCombine(inst->libDir(), lib.filename));
+		if (libInfo.exists())
+			continue;
+		fmlLibsToProcess.append(lib);
+	}
+
+	// if everything is in place, there's nothing to do here...
+	if (fmlLibsToProcess.isEmpty())
+	{
+		lwjglStart();
+		return;
+	}
+
+	// download missing libs to our place
+	setStatus(tr("Dowloading FML libraries..."));
+	auto dljob = new NetJob("FML libraries");
+	auto metacache = ENV.metacache();
+	for (auto &lib : fmlLibsToProcess)
+	{
+		auto entry = metacache->resolveEntry("fmllibs", lib.filename);
+		QString urlString = lib.ours ? URLConstants::FMLLIBS_OUR_BASE_URL + lib.filename
+									 : URLConstants::FMLLIBS_FORGE_BASE_URL + lib.filename;
+		dljob->addNetAction(CacheDownload::make(QUrl(urlString), entry));
+	}
+
+	connect(dljob, &NetJob::succeeded, this, &LegacyUpdate::fmllibsFinished);
+	connect(dljob, &NetJob::failed, this, &LegacyUpdate::fmllibsFailed);
+	connect(dljob, &NetJob::progress, this, &LegacyUpdate::progress);
+	legacyDownloadJob.reset(dljob);
+	legacyDownloadJob->start();
+}
+
+void LegacyUpdate::fmllibsFinished()
+{
+	legacyDownloadJob.reset();
+	if(!fmlLibsToProcess.isEmpty())
+	{
+		setStatus(tr("Copying FML libraries into the instance..."));
+		LegacyInstance *inst = (LegacyInstance *)m_inst;
+		auto metacache = ENV.metacache();
+		int index = 0;
+		for (auto &lib : fmlLibsToProcess)
+		{
+			progress(index, fmlLibsToProcess.size());
+			auto entry = metacache->resolveEntry("fmllibs", lib.filename);
+			auto path = FS::PathCombine(inst->libDir(), lib.filename);
+			if(!FS::ensureFilePathExists(path))
+			{
+				emitFailed(tr("Failed creating FML library folder inside the instance."));
+				return;
+			}
+			if (!QFile::copy(entry->getFullPath(), FS::PathCombine(inst->libDir(), lib.filename)))
+			{
+				emitFailed(tr("Failed copying Forge/FML library: %1.").arg(lib.filename));
+				return;
+			}
+			index++;
+		}
+		progress(index, fmlLibsToProcess.size());
+	}
+	lwjglStart();
+}
+
+void LegacyUpdate::fmllibsFailed(QString reason)
+{
+	emitFailed(tr("Game update failed: it was impossible to fetch the required FML libraries. Reason: %1").arg(reason));
+	return;
+}
+
+void LegacyUpdate::lwjglStart()
+{
+	LegacyInstance *inst = (LegacyInstance *)m_inst;
+
+	lwjglVersion = inst->lwjglVersion();
+	lwjglTargetPath = FS::PathCombine(inst->lwjglFolder(), lwjglVersion);
+	lwjglNativesPath = FS::PathCombine(lwjglTargetPath, "natives");
+
+	// if the 'done' file exists, we don't have to download this again
+	QFileInfo doneFile(FS::PathCombine(lwjglTargetPath, "done"));
+	if (doneFile.exists())
+	{
+		jarStart();
+		return;
+	}
+
+	auto list = std::dynamic_pointer_cast<LWJGLVersionList>(ENV.getVersionList("org.lwjgl.legacy"));
+	if (!list->isLoaded())
+	{
+		emitFailed("Too soon! Let the LWJGL list load :)");
+		return;
+	}
+
+	setStatus(tr("Downloading new LWJGL..."));
+	auto version = std::dynamic_pointer_cast<LWJGLVersion>(list->findVersion(lwjglVersion));
+	if (!version)
+	{
+		emitFailed("Game update failed: the selected LWJGL version is invalid.");
+		return;
+	}
+
+	QString url = version->url();
+	QUrl realUrl(url);
+	QString hostname = realUrl.host();
+	auto worker = ENV.qnam();
+	QNetworkRequest req(realUrl);
+	req.setRawHeader("Host", hostname.toLatin1());
+	req.setHeader(QNetworkRequest::UserAgentHeader, "MultiMC/5.0 (Cached)");
+	QNetworkReply *rep = worker->get(req);
+
+	m_reply = std::shared_ptr<QNetworkReply>(rep);
+	connect(rep, &QNetworkReply::downloadProgress, this, &LegacyUpdate::progress);
+	connect(worker.get(), &QNetworkAccessManager::finished, this, &LegacyUpdate::lwjglFinished);
+}
+
+void LegacyUpdate::lwjglFinished(QNetworkReply *reply)
+{
+	if (m_reply.get() != reply)
+	{
+		return;
+	}
+	if (reply->error() != QNetworkReply::NoError)
+	{
+		emitFailed("Failed to download: " + reply->errorString() +
+				   "\nSometimes you have to wait a bit if you download many LWJGL versions in "
+				   "a row. YMMV");
+		return;
+	}
+	auto worker = ENV.qnam();
+	// Here i check if there is a cookie for me in the reply and extract it
+	QList<QNetworkCookie> cookies =
+		qvariant_cast<QList<QNetworkCookie>>(reply->header(QNetworkRequest::SetCookieHeader));
+	if (cookies.count() != 0)
+	{
+		// you must tell which cookie goes with which url
+		worker->cookieJar()->setCookiesFromUrl(cookies, QUrl("sourceforge.net"));
+	}
+
+	// here you can check for the 302 or whatever other header i need
+	QVariant newLoc = reply->header(QNetworkRequest::LocationHeader);
+	if (newLoc.isValid())
+	{
+		QString redirectedTo = reply->header(QNetworkRequest::LocationHeader).toString();
+		QUrl realUrl(redirectedTo);
+		QString hostname = realUrl.host();
+		QNetworkRequest req(redirectedTo);
+		req.setRawHeader("Host", hostname.toLatin1());
+		req.setHeader(QNetworkRequest::UserAgentHeader, "MultiMC/5.0 (Cached)");
+		QNetworkReply *rep = worker->get(req);
+		connect(rep, &QNetworkReply::downloadProgress, this, &LegacyUpdate::progress);
+		m_reply = std::shared_ptr<QNetworkReply>(rep);
+		return;
+	}
+	QFile saveMe("lwjgl.zip");
+	saveMe.open(QIODevice::WriteOnly);
+	saveMe.write(m_reply->readAll());
+	saveMe.close();
+	setStatus(tr("Installing new LWJGL..."));
+	extractLwjgl();
+	jarStart();
+}
+void LegacyUpdate::extractLwjgl()
+{
+	// make sure the directories are there
+
+	bool success = FS::ensureFolderPathExists(lwjglNativesPath);
+
+	if (!success)
+	{
+		emitFailed("Failed to extract the lwjgl libs - error when creating required folders.");
+		return;
+	}
+
+	QuaZip zip("lwjgl.zip");
+	if (!zip.open(QuaZip::mdUnzip))
+	{
+		emitFailed("Failed to extract the lwjgl libs - not a valid archive.");
+		return;
+	}
+
+	// and now we are going to access files inside it
+	QuaZipFile file(&zip);
+	const QString jarNames[] = {"jinput.jar", "lwjgl_util.jar", "lwjgl.jar"};
+	for (bool more = zip.goToFirstFile(); more; more = zip.goToNextFile())
+	{
+		if (!file.open(QIODevice::ReadOnly))
+		{
+			zip.close();
+			emitFailed("Failed to extract the lwjgl libs - error while reading archive.");
+			return;
+		}
+		QuaZipFileInfo info;
+		QString name = file.getActualFileName();
+		if (name.endsWith('/'))
+		{
+			file.close();
+			continue;
+		}
+		QString destFileName;
+		// Look for the jars
+		for (int i = 0; i < 3; i++)
+		{
+			if (name.endsWith(jarNames[i]))
+			{
+				destFileName = FS::PathCombine(lwjglTargetPath, jarNames[i]);
+			}
+		}
+		// Not found? look for the natives
+		if (destFileName.isEmpty())
+		{
+#ifdef Q_OS_WIN32
+			QString nativesDir = "windows";
+#else
+#ifdef Q_OS_MAC
+			QString nativesDir = "macosx";
+#else
+			QString nativesDir = "linux";
+#endif
+#endif
+			if (name.contains(nativesDir))
+			{
+				int lastSlash = name.lastIndexOf('/');
+				int lastBackSlash = name.lastIndexOf('\\');
+				if (lastSlash != -1)
+					name = name.mid(lastSlash + 1);
+				else if (lastBackSlash != -1)
+					name = name.mid(lastBackSlash + 1);
+				destFileName = FS::PathCombine(lwjglNativesPath, name);
+			}
+		}
+		// Now if destFileName is still empty, go to the next file.
+		if (!destFileName.isEmpty())
+		{
+			setStatus(tr("Installing new LWJGL - extracting ") + name + "...");
+			QFile output(destFileName);
+			output.open(QIODevice::WriteOnly);
+			output.write(file.readAll());
+			output.close();
+		}
+		file.close(); // do not forget to close!
+	}
+	zip.close();
+	m_reply.reset();
+	QFile doneFile(FS::PathCombine(lwjglTargetPath, "done"));
+	doneFile.open(QIODevice::WriteOnly);
+	doneFile.write("done.");
+	doneFile.close();
+}
+
+void LegacyUpdate::lwjglFailed(QString reason)
+{
+	emitFailed(tr("Bad stuff happened while trying to get the lwjgl libs: %1").arg(reason));
+}
+
+void LegacyUpdate::jarStart()
+{
+	LegacyInstance *inst = (LegacyInstance *)m_inst;
+	if (!inst->shouldUpdate() || inst->shouldUseCustomBaseJar())
+	{
+		emitSucceeded();
+		return;
+	}
+
+	setStatus(tr("Checking for jar updates..."));
+	// Make directories
+	QDir binDir(inst->binDir());
+	if (!binDir.exists() && !binDir.mkpath("."))
+	{
+		emitFailed("Failed to create bin folder.");
+		return;
+	}
+
+	// Build a list of URLs that will need to be downloaded.
+	setStatus(tr("Downloading new minecraft.jar ..."));
+
+	QString version_id = inst->intendedVersionId();
+	QString localPath = version_id + "/" + version_id + ".jar";
+	QString urlstr = "http://" + URLConstants::AWS_DOWNLOAD_VERSIONS + localPath;
+
+	auto dljob = new NetJob("Minecraft.jar for version " + version_id);
+
+	auto metacache = ENV.metacache();
+	auto entry = metacache->resolveEntry("versions", localPath);
+	dljob->addNetAction(CacheDownload::make(QUrl(urlstr), entry));
+	connect(dljob, SIGNAL(succeeded()), SLOT(jarFinished()));
+	connect(dljob, SIGNAL(failed(QString)), SLOT(jarFailed(QString)));
+	connect(dljob, SIGNAL(progress(qint64, qint64)), SIGNAL(progress(qint64, qint64)));
+	legacyDownloadJob.reset(dljob);
+	legacyDownloadJob->start();
+}
+
+void LegacyUpdate::jarFinished()
+{
+	// process the jar
+	emitSucceeded();
+}
+
+void LegacyUpdate::jarFailed(QString reason)
+{
+	// bad, bad
+	emitFailed(tr("Failed to download the minecraft jar: %1.").arg(reason));
+}
diff --git a/logic/minecraft/legacy/LegacyUpdate.h b/logic/minecraft/legacy/LegacyUpdate.h
new file mode 100644
index 00000000..c52bf934
--- /dev/null
+++ b/logic/minecraft/legacy/LegacyUpdate.h
@@ -0,0 +1,70 @@
+/* Copyright 2013-2015 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 <QUrl>
+
+#include "net/NetJob.h"
+#include "tasks/Task.h"
+#include "minecraft/VersionFilterData.h"
+
+class MinecraftVersion;
+class BaseInstance;
+class QuaZip;
+class Mod;
+
+class LegacyUpdate : public Task
+{
+	Q_OBJECT
+public:
+	explicit LegacyUpdate(BaseInstance *inst, QObject *parent = 0);
+	virtual void executeTask();
+
+private
+slots:
+	void lwjglStart();
+	void lwjglFinished(QNetworkReply *);
+	void lwjglFailed(QString reason);
+
+	void jarStart();
+	void jarFinished();
+	void jarFailed(QString reason);
+
+	void fmllibsStart();
+	void fmllibsFinished();
+	void fmllibsFailed(QString reason);
+
+	void extractLwjgl();
+
+private:
+
+	std::shared_ptr<QNetworkReply> m_reply;
+
+	// target version, determined during this task
+	// MinecraftVersion *targetVersion;
+	QString lwjglURL;
+	QString lwjglVersion;
+
+	QString lwjglTargetPath;
+	QString lwjglNativesPath;
+
+private:
+	NetJobPtr legacyDownloadJob;
+	BaseInstance *m_inst = nullptr;
+	QList<FMLlib> fmlLibsToProcess;
+};
diff --git a/logic/minecraft/legacy/LwjglVersionList.cpp b/logic/minecraft/legacy/LwjglVersionList.cpp
new file mode 100644
index 00000000..bb017368
--- /dev/null
+++ b/logic/minecraft/legacy/LwjglVersionList.cpp
@@ -0,0 +1,189 @@
+/* Copyright 2013-2015 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 "LwjglVersionList.h"
+#include "Env.h"
+
+#include <QtNetwork>
+#include <QtXml>
+#include <QRegExp>
+
+#include <QDebug>
+
+#define RSS_URL "http://sourceforge.net/projects/java-game-lib/rss"
+
+LWJGLVersionList::LWJGLVersionList(QObject *parent) : BaseVersionList(parent)
+{
+	setLoading(false);
+}
+
+QVariant LWJGLVersionList::data(const QModelIndex &index, int role) const
+{
+	if (!index.isValid())
+		return QVariant();
+
+	if (index.row() > count())
+		return QVariant();
+
+	const PtrLWJGLVersion version = m_vlist.at(index.row());
+
+	switch (role)
+	{
+	case Qt::DisplayRole:
+		return version->name();
+
+	case Qt::ToolTipRole:
+		return version->url();
+
+	default:
+		return QVariant();
+	}
+}
+
+QVariant LWJGLVersionList::headerData(int section, Qt::Orientation orientation, int role) const
+{
+	switch (role)
+	{
+	case Qt::DisplayRole:
+		return tr("Version");
+
+	case Qt::ToolTipRole:
+		return tr("LWJGL version name.");
+
+	default:
+		return QVariant();
+	}
+}
+
+int LWJGLVersionList::columnCount(const QModelIndex &parent) const
+{
+	return 1;
+}
+
+bool LWJGLVersionList::isLoading() const
+{
+	return m_loading;
+}
+
+void LWJGLVersionList::loadList()
+{
+	Q_ASSERT_X(!m_loading, "loadList", "list is already loading (m_loading is true)");
+
+	setLoading(true);
+	auto worker = ENV.qnam();
+	QNetworkRequest req(QUrl(RSS_URL));
+	req.setRawHeader("Accept", "application/rss+xml, text/xml, */*");
+	req.setRawHeader("User-Agent", "MultiMC/5.0 (Uncached)");
+	reply = worker->get(req);
+	connect(reply, SIGNAL(finished()), SLOT(netRequestComplete()));
+}
+
+inline QDomElement getDomElementByTagName(QDomElement parent, QString tagname)
+{
+	QDomNodeList elementList = parent.elementsByTagName(tagname);
+	if (elementList.count())
+		return elementList.at(0).toElement();
+	else
+		return QDomElement();
+}
+
+void LWJGLVersionList::netRequestComplete()
+{
+	if (reply->error() == QNetworkReply::NoError)
+	{
+		QRegExp lwjglRegex("lwjgl-(([0-9]\\.?)+)\\.zip");
+		Q_ASSERT_X(lwjglRegex.isValid(), "load LWJGL list", "LWJGL regex is invalid");
+
+		QDomDocument doc;
+
+		QString xmlErrorMsg;
+		int errorLine;
+		auto rawData = reply->readAll();
+		if (!doc.setContent(rawData, false, &xmlErrorMsg, &errorLine))
+		{
+			failed("Failed to load LWJGL list. XML error: " + xmlErrorMsg + " at line " +
+				   QString::number(errorLine));
+			setLoading(false);
+			return;
+		}
+
+		QDomNodeList items = doc.elementsByTagName("item");
+
+		QList<PtrLWJGLVersion> tempList;
+
+		for (int i = 0; i < items.length(); i++)
+		{
+			Q_ASSERT_X(items.at(i).isElement(), "load LWJGL list",
+					   "XML element isn't an element... wat?");
+
+			QDomElement linkElement = getDomElementByTagName(items.at(i).toElement(), "link");
+			if (linkElement.isNull())
+			{
+				qDebug() << "Link element" << i << "in RSS feed doesn't exist! Skipping.";
+				continue;
+			}
+
+			QString link = linkElement.text();
+
+			// Make sure it's a download link.
+			if (link.endsWith("/download") && link.contains(lwjglRegex))
+			{
+				QString name = link.mid(lwjglRegex.indexIn(link) + 6);
+				// Subtract 4 here to remove the .zip file extension.
+				name = name.left(lwjglRegex.matchedLength() - 10);
+
+				QUrl url(link);
+				if (!url.isValid())
+				{
+					qWarning() << "LWJGL version URL isn't valid:" << link << "Skipping.";
+					continue;
+				}
+				qDebug() << "Discovered LWGL version" << name << "at" << link;
+				tempList.append(std::make_shared<LWJGLVersion>(name, link));
+			}
+		}
+
+		beginResetModel();
+		m_vlist.swap(tempList);
+		endResetModel();
+
+		qDebug() << "Loaded LWJGL list.";
+		finished();
+	}
+	else
+	{
+		failed("Failed to load LWJGL list. Network error: " + reply->errorString());
+	}
+
+	setLoading(false);
+	reply->deleteLater();
+}
+
+void LWJGLVersionList::failed(QString msg)
+{
+	qCritical() << msg;
+	emit loadListFailed(msg);
+}
+
+void LWJGLVersionList::finished()
+{
+	emit loadListFinished();
+}
+
+void LWJGLVersionList::setLoading(bool loading)
+{
+	m_loading = loading;
+	emit loadingStateUpdated(m_loading);
+}
diff --git a/logic/minecraft/legacy/LwjglVersionList.h b/logic/minecraft/legacy/LwjglVersionList.h
new file mode 100644
index 00000000..f043f6e2
--- /dev/null
+++ b/logic/minecraft/legacy/LwjglVersionList.h
@@ -0,0 +1,156 @@
+/* Copyright 2013-2015 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 <QAbstractListModel>
+#include <QUrl>
+#include <QNetworkReply>
+#include <memory>
+
+#include "BaseVersion.h"
+#include "BaseVersionList.h"
+
+#include "multimc_logic_export.h"
+
+class LWJGLVersion;
+typedef std::shared_ptr<LWJGLVersion> PtrLWJGLVersion;
+
+class MULTIMC_LOGIC_EXPORT LWJGLVersion : public BaseVersion
+{
+public:
+	LWJGLVersion(const QString &name, const QString &url)
+		: m_name(name), m_url(url)
+	{
+	}
+
+	virtual QString descriptor()
+	{
+		return m_name;
+	}
+
+	virtual QString name()
+	{
+		return m_name;
+	}
+
+	virtual QString typeString() const
+	{
+		return QObject::tr("Upstream");
+	}
+
+	QString url() const
+	{
+		return m_url;
+	}
+
+protected:
+	QString m_name;
+	QString m_url;
+};
+
+class MULTIMC_LOGIC_EXPORT LWJGLVersionList : public BaseVersionList
+{
+	Q_OBJECT
+public:
+	explicit LWJGLVersionList(QObject *parent = 0);
+
+	bool isLoaded() override
+	{
+		return m_vlist.length() > 0;
+	}
+	virtual const BaseVersionPtr at(int i) const override
+	{
+		return m_vlist[i];
+	}
+
+	virtual Task* getLoadTask() override
+	{
+		return nullptr;
+	}
+
+	virtual void sortVersions() override {};
+
+	virtual void updateListData(QList< BaseVersionPtr > versions) override {};
+
+	int count() const override
+	{
+		return m_vlist.length();
+	}
+
+	virtual QVariant data(const QModelIndex &index, int role) const override;
+	virtual QVariant headerData(int section, Qt::Orientation orientation, int role) const override;
+	virtual int rowCount(const QModelIndex &parent) const override
+	{
+		return count();
+	}
+	virtual int columnCount(const QModelIndex &parent) const override;
+
+	virtual bool isLoading() const;
+	virtual bool errored() const
+	{
+		return m_errored;
+	}
+
+	virtual QString lastErrorMsg() const
+	{
+		return m_lastErrorMsg;
+	}
+
+public
+slots:
+	/*!
+	 * Loads the version list.
+	 * This is done asynchronously. On success, the loadListFinished() signal will
+	 * be emitted. The list model will be reset as well, resulting in the modelReset()
+	 * signal being emitted. Note that the model will be reset before loadListFinished() is
+	 * emitted.
+	 * If loading the list failed, the loadListFailed(QString msg),
+	 * signal will be emitted.
+	 */
+	virtual void loadList();
+
+signals:
+	/*!
+	 * Emitted when the list either starts or finishes loading.
+	 * \param loading Whether or not the list is loading.
+	 */
+	void loadingStateUpdated(bool loading);
+
+	void loadListFinished();
+
+	void loadListFailed(QString msg);
+
+private:
+	QList<PtrLWJGLVersion> m_vlist;
+
+	QNetworkReply *m_netReply;
+	QNetworkReply *reply;
+
+	bool m_loading;
+	bool m_errored;
+	QString m_lastErrorMsg;
+
+	void failed(QString msg);
+
+	void finished();
+
+	void setLoading(bool loading);
+
+private
+slots:
+	virtual void netRequestComplete();
+};