Fix FTB-related issues

logic/InstanceFactory.cpp

@@ -174,6 +174,15 @@ InstanceFactory::InstCreateError InstanceFactory::copyInstance(InstancePtr &newI
 		return InstanceFactory::CantCreateDir;
 	}
 
+	INISettingsObject settings_obj(PathCombine(instDir, "instance.cfg"));
+	settings_obj.registerSetting("InstanceType", "Legacy");
+	QString inst_type = settings_obj.get("InstanceType").toString();
+
+	if (inst_type == "OneSixFTB")
+		settings_obj.set("InstanceType", "OneSix");
+	if (inst_type == "LegacyFTB")
+		settings_obj.set("InstanceType", "Legacy");
+
 	oldInstance->copy(instDir);
 
 	auto error = loadInstance(newInstance, instDir);
@@ -190,5 +199,4 @@ InstanceFactory::InstCreateError InstanceFactory::copyInstance(InstancePtr &newI
 		rootDir.removeRecursively();
 		return UnknownCreateError;
 	}
-	return UnknownCreateError;
 }

logic/OneSixInstance.cpp

@@ -320,6 +320,17 @@ bool OneSixInstance::versionIsCustom()
 			|| QFile::exists(PathCombine(instanceRoot(), "user.json"));
 }
 
+bool OneSixInstance::versionIsFTBPack()
+{
+	I_D(const OneSixInstance);
+	auto ver = d->version;
+	if(ver)
+	{
+		return ver->hasFtbPack();
+	}
+	return false;
+}
+
 QString OneSixInstance::currentVersionId() const
 {
 	return intendedVersionId();

logic/OneSixInstance.h

@@ -68,6 +68,8 @@ public:
 	std::shared_ptr<VersionFinal> getVanillaVersion() const;
 	/// is the current version original, or custom?
 	virtual bool versionIsCustom() override;
+	/// does this instance have an FTB pack patch inside?
+	bool versionIsFTBPack();
 
 	virtual QString defaultBaseJar() const override;
 	virtual QString defaultCustomBaseJar() const override;

logic/VersionFinal.cpp

@@ -70,6 +70,7 @@ bool VersionFinal::canRemove(const int index) const
 	}
 	return false;
 }
+
 bool VersionFinal::remove(const int index)
 {
 	if (canRemove(index) && QFile::remove(versionFiles.at(index)->filename))
@@ -83,6 +84,20 @@ bool VersionFinal::remove(const int index)
 	return false;
 }
 
+bool VersionFinal::remove(const QString id)
+{
+	int i = 0;
+	for (auto file : versionFiles)
+	{
+		if (file->fileId == id)
+		{
+			return remove(i);
+		}
+		i++;
+	}
+	return false;
+}
+
 QString VersionFinal::versionFileId(const int index) const
 {
 	if (index < 0 || index >= versionFiles.size())
@@ -91,6 +106,7 @@ QString VersionFinal::versionFileId(const int index) const
 	}
 	return versionFiles.at(index)->fileId;
 }
+
 VersionFilePtr VersionFinal::versionFile(const QString &id)
 {
 	for (auto file : versionFiles)
@@ -103,6 +119,16 @@ VersionFilePtr VersionFinal::versionFile(const QString &id)
 	return 0;
 }
 
+bool VersionFinal::hasFtbPack()
+{
+	return versionFile("org.multimc.ftb.pack.json") != nullptr;
+}
+
+bool VersionFinal::removeFtbPack()
+{
+	return remove("org.multimc.ftb.pack.json");
+}
+
 QList<std::shared_ptr<OneSixLibrary> > VersionFinal::getActiveNormalLibs()
 {
 	QList<std::shared_ptr<OneSixLibrary> > output;

logic/VersionFinal.h

@@ -49,6 +49,11 @@ public:
 	bool isCustom();
 	// remove custom.json
 	bool revertToBase();
+	// does this instance have an FTB pack patch file?
+	bool hasFtbPack();
+	// remove FTB pack
+	bool removeFtbPack();
+	
 
 	enum MoveDirection { MoveUp, MoveDown };
 	void move(const int index, const MoveDirection direction);
@@ -61,6 +66,7 @@ public:
 public
 slots:
 	bool remove(const int index);
+	bool remove(const QString id);
 
 public:
 	QList<std::shared_ptr<OneSixLibrary>> getActiveNormalLibs();