9 files changed, 801 insertions, 0 deletions
diff --git a/api/logic/minecraft/ftb/FTBPlugin.cpp b/api/logic/minecraft/ftb/FTBPlugin.cpp
new file mode 100644
index 00000000..a142c106
--- /dev/null
+++ b/api/logic/minecraft/ftb/FTBPlugin.cpp
@@ -0,0 +1,395 @@
+#include "FTBPlugin.h"
+#include <Env.h>
+#include "FTBVersion.h"
+#include "LegacyFTBInstance.h"
+#include "OneSixFTBInstance.h"
+#include <BaseInstance.h>
+#include <InstanceList.h>
+#include <minecraft/MinecraftVersionList.h>
+#include <settings/INISettingsObject.h>
+#include <FileSystem.h>
+#include "QDebug"
+#include <QXmlStreamReader>
+#include <QRegularExpression>
+
+struct FTBRecord
+{
+	QString dirName;
+	QString name;
+	QString logo;
+	QString iconKey;
+	QString mcVersion;
+	QString description;
+	QString instanceDir;
+	QString templateDir;
+	bool operator==(const FTBRecord other) const
+	{
+		return instanceDir == other.instanceDir;
+	}
+};
+
+inline uint qHash(FTBRecord record)
+{
+	return qHash(record.instanceDir);
+}
+
+QSet<FTBRecord> discoverFTBInstances(SettingsObjectPtr globalSettings)
+{
+	QSet<FTBRecord> records;
+	QDir dir = QDir(globalSettings->get("FTBLauncherLocal").toString());
+	QDir dataDir = QDir(globalSettings->get("FTBRoot").toString());
+	if (!dataDir.exists())
+	{
+		qDebug() << "The FTB directory specified does not exist. Please check your settings";
+		return records;
+	}
+	else if (!dir.exists())
+	{
+		qDebug() << "The FTB launcher data directory specified does not exist. Please check "
+					"your settings";
+		return records;
+	}
+	dir.cd("ModPacks");
+	auto allFiles = dir.entryList(QDir::Readable | QDir::Files, QDir::Name);
+	for (auto filename : allFiles)
+	{
+		if (!filename.endsWith(".xml"))
+			continue;
+		auto fpath = dir.absoluteFilePath(filename);
+		QFile f(fpath);
+		qDebug() << "Discovering FTB instances -- " << fpath;
+		if (!f.open(QFile::ReadOnly))
+			continue;
+
+		// read the FTB packs XML.
+		QXmlStreamReader reader(&f);
+		while (!reader.atEnd())
+		{
+			switch (reader.readNext())
+			{
+			case QXmlStreamReader::StartElement:
+			{
+				if (reader.name() == "modpack")
+				{
+					QXmlStreamAttributes attrs = reader.attributes();
+					FTBRecord record;
+					record.dirName = attrs.value("dir").toString();
+					record.instanceDir = dataDir.absoluteFilePath(record.dirName);
+					record.templateDir = dir.absoluteFilePath(record.dirName);
+					QDir test(record.instanceDir);
+					qDebug() << dataDir.absolutePath() << record.instanceDir << record.dirName;
+					if (!test.exists())
+						continue;
+					record.name = attrs.value("name").toString();
+					record.logo = attrs.value("logo").toString();
+					QString logo = record.logo;
+					record.iconKey = logo.remove(QRegularExpression("\\..*"));
+					auto customVersions = attrs.value("customMCVersions");
+					if (!customVersions.isNull())
+					{
+						QMap<QString, QString> versionMatcher;
+						QString customVersionsStr = customVersions.toString();
+						QStringList list = customVersionsStr.split(';');
+						for (auto item : list)
+						{
+							auto segment = item.split('^');
+							if (segment.size() != 2)
+							{
+								qCritical() << "FTB: Segment of size < 2 in "
+											<< customVersionsStr;
+								continue;
+							}
+							versionMatcher[segment[0]] = segment[1];
+						}
+						auto actualVersion = attrs.value("version").toString();
+						if (versionMatcher.contains(actualVersion))
+						{
+							record.mcVersion = versionMatcher[actualVersion];
+						}
+						else
+						{
+							record.mcVersion = attrs.value("mcVersion").toString();
+						}
+					}
+					else
+					{
+						record.mcVersion = attrs.value("mcVersion").toString();
+					}
+					record.description = attrs.value("description").toString();
+					records.insert(record);
+				}
+				break;
+			}
+			case QXmlStreamReader::EndElement:
+				break;
+			case QXmlStreamReader::Characters:
+				break;
+			default:
+				break;
+			}
+		}
+		f.close();
+	}
+	return records;
+}
+
+InstancePtr loadInstance(SettingsObjectPtr globalSettings, QMap<QString, QString> &groupMap, const FTBRecord & record)
+{
+	InstancePtr inst;
+
+	auto m_settings = std::make_shared<INISettingsObject>(FS::PathCombine(record.instanceDir, "instance.cfg"));
+	m_settings->registerSetting("InstanceType", "Legacy");
+
+	qDebug() << "Loading existing " << record.name;
+
+	QString inst_type = m_settings->get("InstanceType").toString();
+	if (inst_type == "LegacyFTB")
+	{
+		inst.reset(new LegacyFTBInstance(globalSettings, m_settings, record.instanceDir));
+	}
+	else if (inst_type == "OneSixFTB")
+	{
+		inst.reset(new OneSixFTBInstance(globalSettings, m_settings, record.instanceDir));
+	}
+	else
+	{
+		return nullptr;
+	}
+	qDebug() << "Construction " << record.instanceDir;
+
+	SettingsObject::Lock lock(inst->settings());
+	inst->init();
+	qDebug() << "Init " << record.instanceDir;
+	inst->setGroupInitial("FTB");
+	/**
+	 * FIXME: this does not respect the user's preferences. BUT, it would work nicely with the planned pack support
+	 *        -> instead of changing the user values, change pack values (defaults you can look at and revert to)
+	 */
+	/*
+	inst->setName(record.name);
+	inst->setIconKey(record.iconKey);
+	inst->setNotes(record.description);
+	*/
+	if (inst->intendedVersionId() != record.mcVersion)
+	{
+		inst->setIntendedVersionId(record.mcVersion);
+	}
+	qDebug() << "Post-Process " << record.instanceDir;
+	if (!InstanceList::continueProcessInstance(inst, InstanceList::NoCreateError, record.instanceDir, groupMap))
+	{
+		return nullptr;
+	}
+	qDebug() << "Final " << record.instanceDir;
+	return inst;
+}
+
+InstancePtr createInstance(SettingsObjectPtr globalSettings, QMap<QString, QString> &groupMap, const FTBRecord & record)
+{
+	QDir rootDir(record.instanceDir);
+
+	InstancePtr inst;
+
+	qDebug() << "Converting " << record.name << " as new.";
+
+	auto mcVersion = std::dynamic_pointer_cast<MinecraftVersion>(ENV.getVersion("net.minecraft", record.mcVersion));
+	if (!mcVersion)
+	{
+		qCritical() << "Can't load instance " << record.instanceDir
+					<< " because minecraft version " << record.mcVersion
+					<< " can't be resolved.";
+		return nullptr;
+	}
+
+	if (!rootDir.exists() && !rootDir.mkpath("."))
+	{
+		qCritical() << "Can't create instance folder" << record.instanceDir;
+		return nullptr;
+	}
+
+	auto m_settings = std::make_shared<INISettingsObject>(FS::PathCombine(record.instanceDir, "instance.cfg"));
+	m_settings->registerSetting("InstanceType", "Legacy");
+
+	if (mcVersion->usesLegacyLauncher())
+	{
+		m_settings->set("InstanceType", "LegacyFTB");
+		inst.reset(new LegacyFTBInstance(globalSettings, m_settings, record.instanceDir));
+	}
+	else
+	{
+		m_settings->set("InstanceType", "OneSixFTB");
+		inst.reset(new OneSixFTBInstance(globalSettings, m_settings, record.instanceDir));
+	}
+	// initialize
+	{
+		SettingsObject::Lock lock(inst->settings());
+		inst->setIntendedVersionId(mcVersion->descriptor());
+		inst->init();
+		inst->setGroupInitial("FTB");
+		inst->setName(record.name);
+		inst->setIconKey(record.iconKey);
+		inst->setNotes(record.description);
+		qDebug() << "Post-Process " << record.instanceDir;
+		if (!InstanceList::continueProcessInstance(inst, InstanceList::NoCreateError, record.instanceDir, groupMap))
+		{
+			return nullptr;
+		}
+	}
+	return inst;
+}
+
+void FTBPlugin::loadInstances(SettingsObjectPtr globalSettings, QMap<QString, QString> &groupMap, QList<InstancePtr> &tempList)
+{
+	// nothing to load when we don't have
+	if (globalSettings->get("TrackFTBInstances").toBool() != true)
+	{
+		return;
+	}
+
+	auto records = discoverFTBInstances(globalSettings);
+	if (!records.size())
+	{
+		qDebug() << "No FTB instances to load.";
+		return;
+	}
+	qDebug() << "Loading FTB instances! -- got " << records.size();
+	// process the records we acquired.
+	for (auto record : records)
+	{
+		qDebug() << "Loading FTB instance from " << record.instanceDir;
+		QString iconKey = record.iconKey;
+		// MMC->icons()->addIcon(iconKey, iconKey, FS::PathCombine(record.templateDir, record.logo), MMCIcon::Transient);
+		auto settingsFilePath = FS::PathCombine(record.instanceDir, "instance.cfg");
+		qDebug() << "ICON get!";
+
+		if (QFileInfo(settingsFilePath).exists())
+		{
+			auto instPtr = loadInstance(globalSettings, groupMap, record);
+			if (!instPtr)
+			{
+				qWarning() << "Couldn't load instance config:" << settingsFilePath;
+				if(!QFile::remove(settingsFilePath))
+				{
+					qWarning() << "Couldn't remove broken instance config!";
+					continue;
+				}
+				// failed to load, but removed the poisonous file
+			}
+			else
+			{
+				tempList.append(InstancePtr(instPtr));
+				continue;
+			}
+		}
+		auto instPtr = createInstance(globalSettings, groupMap, record);
+		if (!instPtr)
+		{
+			qWarning() << "Couldn't create FTB instance!";
+			continue;
+		}
+		tempList.append(InstancePtr(instPtr));
+	}
+}
+
+#ifdef Q_OS_WIN32
+#include <windows.h>
+static const int APPDATA_BUFFER_SIZE = 1024;
+#endif
+
+static QString getLocalCacheStorageLocation()
+{
+	QString ftbDefault;
+#ifdef Q_OS_WIN32
+	wchar_t buf[APPDATA_BUFFER_SIZE];
+	if (GetEnvironmentVariableW(L"LOCALAPPDATA", buf, APPDATA_BUFFER_SIZE)) // local
+	{
+		ftbDefault = QDir(QString::fromWCharArray(buf)).absoluteFilePath("ftblauncher");
+	}
+	else if (GetEnvironmentVariableW(L"APPDATA", buf, APPDATA_BUFFER_SIZE)) // roaming
+	{
+		ftbDefault = QDir(QString::fromWCharArray(buf)).absoluteFilePath("ftblauncher");
+	}
+	else
+	{
+		qCritical() << "Your LOCALAPPDATA and APPDATA folders are missing!"
+			" If you are on windows, this means your system is broken.";
+	}
+#elif defined(Q_OS_MAC)
+	ftbDefault = FS::PathCombine(QDir::homePath(), "Library/Application Support/ftblauncher");
+#else
+	ftbDefault = QDir::home().absoluteFilePath(".ftblauncher");
+#endif
+	return ftbDefault;
+}
+
+
+static QString getRoamingStorageLocation()
+{
+	QString ftbDefault;
+#ifdef Q_OS_WIN32
+	wchar_t buf[APPDATA_BUFFER_SIZE];
+	QString cacheStorage;
+	if (GetEnvironmentVariableW(L"APPDATA", buf, APPDATA_BUFFER_SIZE))
+	{
+		ftbDefault = QDir(QString::fromWCharArray(buf)).absoluteFilePath("ftblauncher");
+	}
+	else
+	{
+		qCritical() << "Your APPDATA folder is missing! If you are on windows, this means your system is broken.";
+	}
+#elif defined(Q_OS_MAC)
+	ftbDefault = FS::PathCombine(QDir::homePath(), "Library/Application Support/ftblauncher");
+#else
+	ftbDefault = QDir::home().absoluteFilePath(".ftblauncher");
+#endif
+	return ftbDefault;
+}
+
+void FTBPlugin::initialize(SettingsObjectPtr globalSettings)
+{
+	// FTB
+	globalSettings->registerSetting("TrackFTBInstances", false);
+	QString ftbRoaming = getRoamingStorageLocation();
+	QString ftbLocal = getLocalCacheStorageLocation();
+
+	globalSettings->registerSetting("FTBLauncherRoaming", ftbRoaming);
+	globalSettings->registerSetting("FTBLauncherLocal", ftbLocal);
+	qDebug() << "FTB Launcher paths:" << globalSettings->get("FTBLauncherRoaming").toString()
+			 << "and" << globalSettings->get("FTBLauncherLocal").toString();
+
+	globalSettings->registerSetting("FTBRoot");
+	if (globalSettings->get("FTBRoot").isNull())
+	{
+		QString ftbRoot;
+		QFile f(QDir(globalSettings->get("FTBLauncherRoaming").toString()).absoluteFilePath("ftblaunch.cfg"));
+		qDebug() << "Attempting to read" << f.fileName();
+		if (f.open(QFile::ReadOnly))
+		{
+			const QString data = QString::fromLatin1(f.readAll());
+			QRegularExpression exp("installPath=(.*)");
+			ftbRoot = QDir::cleanPath(exp.match(data).captured(1));
+#ifdef Q_OS_WIN32
+			if (!ftbRoot.isEmpty())
+			{
+				if (ftbRoot.at(0).isLetter() && ftbRoot.size() > 1 && ftbRoot.at(1) == '/')
+				{
+					ftbRoot.remove(1, 1);
+				}
+			}
+#endif
+			if (ftbRoot.isEmpty())
+			{
+				qDebug() << "Failed to get FTB root path";
+			}
+			else
+			{
+				qDebug() << "FTB is installed at" << ftbRoot;
+				globalSettings->set("FTBRoot", ftbRoot);
+			}
+		}
+		else
+		{
+			qWarning() << "Couldn't open" << f.fileName() << ":" << f.errorString();
+			qWarning() << "This is perfectly normal if you don't have FTB installed";
+		}
+	}
+}
diff --git a/api/logic/minecraft/ftb/FTBPlugin.h b/api/logic/minecraft/ftb/FTBPlugin.h
new file mode 100644
index 00000000..6851d8a5
--- /dev/null
+++ b/api/logic/minecraft/ftb/FTBPlugin.h
@@ -0,0 +1,13 @@
+#pragma once
+
+#include <BaseInstance.h>
+
+#include "multimc_logic_export.h"
+
+// Pseudo-plugin for FTB related things. Super derpy!
+class MULTIMC_LOGIC_EXPORT FTBPlugin
+{
+public:
+	static void initialize(SettingsObjectPtr globalSettings);
+	static void loadInstances(SettingsObjectPtr globalSettings, QMap<QString, QString> &groupMap, QList<InstancePtr> &tempList);
+};
diff --git a/api/logic/minecraft/ftb/FTBProfileStrategy.cpp b/api/logic/minecraft/ftb/FTBProfileStrategy.cpp
new file mode 100644
index 00000000..f5faacae
--- /dev/null
+++ b/api/logic/minecraft/ftb/FTBProfileStrategy.cpp
@@ -0,0 +1,128 @@
+#include "FTBProfileStrategy.h"
+#include "OneSixFTBInstance.h"
+
+#include "minecraft/VersionBuildError.h"
+#include "minecraft/MinecraftVersionList.h"
+#include <FileSystem.h>
+
+#include <QDir>
+#include <QUuid>
+#include <QJsonDocument>
+#include <QJsonArray>
+
+FTBProfileStrategy::FTBProfileStrategy(OneSixFTBInstance* instance) : OneSixProfileStrategy(instance)
+{
+}
+
+void FTBProfileStrategy::loadDefaultBuiltinPatches()
+{
+	// FIXME: this should be here, but it needs us to be able to deal with multiple libraries paths
+	// OneSixProfileStrategy::loadDefaultBuiltinPatches();
+	auto mcVersion = m_instance->intendedVersionId();
+	auto nativeInstance = dynamic_cast<OneSixFTBInstance *>(m_instance);
+
+	ProfilePatchPtr minecraftPatch;
+	{
+		auto mcJson = m_instance->versionsPath().absoluteFilePath(mcVersion + "/" + mcVersion + ".json");
+		// load up the base minecraft patch
+		if(QFile::exists(mcJson))
+		{
+			auto file = ProfileUtils::parseJsonFile(QFileInfo(mcJson), false);
+			file->fileId = "net.minecraft";
+			file->name = QObject::tr("Minecraft (tracked)");
+			file->setVanilla(true);
+			if(file->version.isEmpty())
+			{
+				file->version = mcVersion;
+			}
+			for(auto addLib: file->libraries)
+			{
+				addLib->setHint("local");
+				addLib->setStoragePrefix(nativeInstance->librariesPath().absolutePath());
+			}
+			minecraftPatch = std::dynamic_pointer_cast<ProfilePatch>(file);
+		}
+		else
+		{
+			throw VersionIncomplete("net.minecraft");
+		}
+		minecraftPatch->setOrder(-2);
+	}
+	profile->appendPatch(minecraftPatch);
+
+	ProfilePatchPtr packPatch;
+	{
+		auto mcJson = m_instance->minecraftRoot() + "/pack.json";
+		// load up the base minecraft patch
+		if(QFile::exists(mcJson))
+		{
+			auto file = ProfileUtils::parseJsonFile(QFileInfo(mcJson), false);
+
+			// adapt the loaded file - the FTB patch file format is different than ours.
+			file->minecraftVersion.clear();
+			for(auto addLib: file->libraries)
+			{
+				addLib->setHint("local");
+				addLib->setStoragePrefix(nativeInstance->librariesPath().absolutePath());
+			}
+			file->fileId = "org.multimc.ftb.pack";
+			file->setVanilla(true);
+			file->name = QObject::tr("%1 (FTB pack)").arg(m_instance->name());
+			if(file->version.isEmpty())
+			{
+				file->version = QObject::tr("Unknown");
+				QFile versionFile (FS::PathCombine(m_instance->instanceRoot(), "version"));
+				if(versionFile.exists())
+				{
+					if(versionFile.open(QIODevice::ReadOnly))
+					{
+						// FIXME: just guessing the encoding/charset here.
+						auto version = QString::fromUtf8(versionFile.readAll());
+						file->version = version;
+					}
+				}
+			}
+			packPatch = std::dynamic_pointer_cast<ProfilePatch>(file);
+		}
+		else
+		{
+			throw VersionIncomplete("org.multimc.ftb.pack");
+		}
+		packPatch->setOrder(1);
+	}
+	profile->appendPatch(packPatch);
+
+}
+
+void FTBProfileStrategy::load()
+{
+	profile->clearPatches();
+
+	loadDefaultBuiltinPatches();
+	loadUserPatches();
+}
+
+bool FTBProfileStrategy::saveOrder(ProfileUtils::PatchOrder order)
+{
+	return false;
+}
+
+bool FTBProfileStrategy::resetOrder()
+{
+	return false;
+}
+
+bool FTBProfileStrategy::installJarMods(QStringList filepaths)
+{
+	return false;
+}
+
+bool FTBProfileStrategy::customizePatch(ProfilePatchPtr patch)
+{
+	return false;
+}
+
+bool FTBProfileStrategy::revertPatch(ProfilePatchPtr patch)
+{
+	return false;
+}
diff --git a/api/logic/minecraft/ftb/FTBProfileStrategy.h b/api/logic/minecraft/ftb/FTBProfileStrategy.h
new file mode 100644
index 00000000..522af098
--- /dev/null
+++ b/api/logic/minecraft/ftb/FTBProfileStrategy.h
@@ -0,0 +1,21 @@
+#pragma once
+#include "minecraft/ProfileStrategy.h"
+#include "minecraft/onesix/OneSixProfileStrategy.h"
+
+class OneSixFTBInstance;
+
+class FTBProfileStrategy : public OneSixProfileStrategy
+{
+public:
+	FTBProfileStrategy(OneSixFTBInstance * instance);
+	virtual ~FTBProfileStrategy() {};
+	virtual void load() override;
+	virtual bool resetOrder() override;
+	virtual bool saveOrder(ProfileUtils::PatchOrder order) override;
+	virtual bool installJarMods(QStringList filepaths) override;
+	virtual bool customizePatch (ProfilePatchPtr patch) override;
+	virtual bool revertPatch (ProfilePatchPtr patch) override;
+
+protected:
+	virtual void loadDefaultBuiltinPatches() override;
+};
diff --git a/api/logic/minecraft/ftb/FTBVersion.h b/api/logic/minecraft/ftb/FTBVersion.h
new file mode 100644
index 00000000..805319b4
--- /dev/null
+++ b/api/logic/minecraft/ftb/FTBVersion.h
@@ -0,0 +1,32 @@
+#pragma once
+#include <minecraft/MinecraftVersion.h>
+
+class FTBVersion : public BaseVersion
+{
+public:
+	FTBVersion(MinecraftVersionPtr parent) : m_version(parent){};
+
+public:
+	virtual QString descriptor() override
+	{
+		return m_version->descriptor();
+	}
+
+	virtual QString name() override
+	{
+		return m_version->name();
+	}
+
+	virtual QString typeString() const override
+	{
+		return m_version->typeString();
+	}
+
+	MinecraftVersionPtr getMinecraftVersion()
+	{
+		return m_version;
+	}
+
+private:
+	MinecraftVersionPtr m_version;
+};
diff --git a/api/logic/minecraft/ftb/LegacyFTBInstance.cpp b/api/logic/minecraft/ftb/LegacyFTBInstance.cpp
new file mode 100644
index 00000000..a7091f1d
--- /dev/null
+++ b/api/logic/minecraft/ftb/LegacyFTBInstance.cpp
@@ -0,0 +1,27 @@
+#include "LegacyFTBInstance.h"
+#include <settings/INISettingsObject.h>
+#include <QDir>
+
+LegacyFTBInstance::LegacyFTBInstance(SettingsObjectPtr globalSettings, SettingsObjectPtr settings, const QString &rootDir) :
+	LegacyInstance(globalSettings, settings, rootDir)
+{
+}
+
+QString LegacyFTBInstance::id() const
+{
+	return "FTB/" + BaseInstance::id();
+}
+
+void LegacyFTBInstance::copy(const QDir &newDir)
+{
+	// set the target instance to be plain Legacy
+	INISettingsObject settings_obj(newDir.absoluteFilePath("instance.cfg"));
+	settings_obj.registerSetting("InstanceType", "Legacy");
+	QString inst_type = settings_obj.get("InstanceType").toString();
+	settings_obj.set("InstanceType", "Legacy");
+}
+
+QString LegacyFTBInstance::typeName() const
+{
+	return tr("Legacy FTB");
+}
diff --git a/api/logic/minecraft/ftb/LegacyFTBInstance.h b/api/logic/minecraft/ftb/LegacyFTBInstance.h
new file mode 100644
index 00000000..7178bca4
--- /dev/null
+++ b/api/logic/minecraft/ftb/LegacyFTBInstance.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include "minecraft/legacy/LegacyInstance.h"
+
+class LegacyFTBInstance : public LegacyInstance
+{
+	Q_OBJECT
+public:
+	explicit LegacyFTBInstance(SettingsObjectPtr globalSettings, SettingsObjectPtr settings, const QString &rootDir);
+	virtual QString id() const;
+	virtual void copy(const QDir &newDir);
+	virtual QString typeName() const;
+	bool canExport() const override
+	{
+		return false;
+	}
+};
diff --git a/api/logic/minecraft/ftb/OneSixFTBInstance.cpp b/api/logic/minecraft/ftb/OneSixFTBInstance.cpp
new file mode 100644
index 00000000..81e939a1
--- /dev/null
+++ b/api/logic/minecraft/ftb/OneSixFTBInstance.cpp
@@ -0,0 +1,138 @@
+#include "OneSixFTBInstance.h"
+#include "FTBProfileStrategy.h"
+
+#include "minecraft/MinecraftProfile.h"
+#include "minecraft/GradleSpecifier.h"
+#include "tasks/SequentialTask.h"
+#include <settings/INISettingsObject.h>
+#include <FileSystem.h>
+
+#include <QJsonArray>
+
+OneSixFTBInstance::OneSixFTBInstance(SettingsObjectPtr globalSettings, SettingsObjectPtr settings, const QString &rootDir) :
+	OneSixInstance(globalSettings, settings, rootDir)
+{
+	m_globalSettings = globalSettings;
+}
+
+void OneSixFTBInstance::copy(const QDir &newDir)
+{
+	QStringList libraryNames;
+	// create patch file
+	{
+		qDebug()<< "Creating patch file for FTB instance...";
+		QFile f(minecraftRoot() + "/pack.json");
+		if (!f.open(QFile::ReadOnly))
+		{
+			qCritical() << "Couldn't open" << f.fileName() << ":" << f.errorString();
+			return;
+		}
+		QJsonObject root = QJsonDocument::fromJson(f.readAll()).object();
+		QJsonArray libs = root.value("libraries").toArray();
+		QJsonArray outLibs;
+		for (auto lib : libs)
+		{
+			QJsonObject libObj = lib.toObject();
+			libObj.insert("MMC-hint", QString("local"));
+			libObj.insert("insert", QString("prepend"));
+			libraryNames.append(libObj.value("name").toString());
+			outLibs.append(libObj);
+		}
+		root.remove("libraries");
+		root.remove("id");
+
+		// HACK HACK HACK HACK
+		// A workaround for a problem in MultiMC, triggered by a historical problem in FTB,
+		// triggered by Mojang getting their library versions wrong in 1.7.10
+		if(intendedVersionId() == "1.7.10")
+		{
+			auto insert = [&outLibs, &libraryNames](QString name)
+			{
+				QJsonObject libObj;
+				libObj.insert("insert", QString("replace"));
+				libObj.insert("name", name);
+				libraryNames.push_back(name);
+				outLibs.prepend(libObj);
+			};
+			insert("com.google.guava:guava:16.0");
+			insert("org.apache.commons:commons-lang3:3.2.1");
+		}
+		root.insert("+libraries", outLibs);
+		root.insert("order", 1);
+		root.insert("fileId", QString("org.multimc.ftb.pack.json"));
+		root.insert("name", name());
+		root.insert("mcVersion", intendedVersionId());
+		root.insert("version", intendedVersionId());
+		FS::ensureFilePathExists(newDir.absoluteFilePath("patches/ftb.json"));
+		QFile out(newDir.absoluteFilePath("patches/ftb.json"));
+		if (!out.open(QFile::WriteOnly | QFile::Truncate))
+		{
+			qCritical() << "Couldn't open" << out.fileName() << ":" << out.errorString();
+			return;
+		}
+		out.write(QJsonDocument(root).toJson());
+	}
+	// copy libraries
+	{
+		qDebug() << "Copying FTB libraries";
+		for (auto library : libraryNames)
+		{
+			GradleSpecifier lib(library);
+			const QString out = QDir::current().absoluteFilePath("libraries/" + lib.toPath());
+			if (QFile::exists(out))
+			{
+				continue;
+			}
+			if (!FS::ensureFilePathExists(out))
+			{
+				qCritical() << "Couldn't create folder structure for" << out;
+			}
+			if (!QFile::copy(librariesPath().absoluteFilePath(lib.toPath()), out))
+			{
+				qCritical() << "Couldn't copy" << QString(lib);
+			}
+		}
+	}
+	// now set the target instance to be plain OneSix
+	INISettingsObject settings_obj(newDir.absoluteFilePath("instance.cfg"));
+	settings_obj.registerSetting("InstanceType", "Legacy");
+	QString inst_type = settings_obj.get("InstanceType").toString();
+	settings_obj.set("InstanceType", "OneSix");
+}
+
+QString OneSixFTBInstance::id() const
+{
+	return "FTB/" + BaseInstance::id();
+}
+
+QDir OneSixFTBInstance::librariesPath() const
+{
+	return QDir(m_globalSettings->get("FTBRoot").toString() + "/libraries");
+}
+
+QDir OneSixFTBInstance::versionsPath() const
+{
+	return QDir(m_globalSettings->get("FTBRoot").toString() + "/versions");
+}
+
+bool OneSixFTBInstance::providesVersionFile() const
+{
+	return true;
+}
+
+void OneSixFTBInstance::createProfile()
+{
+	m_profile.reset(new MinecraftProfile(new FTBProfileStrategy(this)));
+}
+
+std::shared_ptr<Task> OneSixFTBInstance::createUpdateTask()
+{
+	return OneSixInstance::createUpdateTask();
+}
+
+QString OneSixFTBInstance::typeName() const
+{
+	return tr("OneSix FTB");
+}
+
+#include "OneSixFTBInstance.moc"
diff --git a/api/logic/minecraft/ftb/OneSixFTBInstance.h b/api/logic/minecraft/ftb/OneSixFTBInstance.h
new file mode 100644
index 00000000..e7f8f485
--- /dev/null
+++ b/api/logic/minecraft/ftb/OneSixFTBInstance.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include "minecraft/onesix/OneSixInstance.h"
+
+class OneSixFTBInstance : public OneSixInstance
+{
+	Q_OBJECT
+public:
+	explicit OneSixFTBInstance(SettingsObjectPtr globalSettings, SettingsObjectPtr settings, const QString &rootDir);
+    virtual ~OneSixFTBInstance(){};
+
+	void copy(const QDir &newDir) override;
+
+	virtual void createProfile() override;
+
+	virtual std::shared_ptr<Task> createUpdateTask() override;
+
+	virtual QString id() const override;
+
+	QDir librariesPath() const override;
+	QDir versionsPath() const override;
+	bool providesVersionFile() const override;
+	virtual QString typeName() const override;
+	bool canExport() const override
+	{
+		return false;
+	}
+private:
+	SettingsObjectPtr m_globalSettings;
+};