Sync from quickmods

42 files changed, 294 insertions, 159 deletions

diff --git a/logic/BaseInstance.cpp b/logic/BaseInstance.cpp
index 9a811577..be6ea184 100644
--- a/logic/BaseInstance.cpp
+++ b/logic/BaseInstance.cpp
@@ -29,6 +29,7 @@
 #include <cmdutils.h>
 #include "logic/minecraft/MinecraftVersionList.h"
 #include "logic/icons/IconList.h"
+#include "logic/InstanceList.h"
 
 BaseInstance::BaseInstance(BaseInstancePrivate *d_in, const QString &rootDir,
 						   SettingsObject *settings_obj, QObject *parent)
@@ -143,10 +144,12 @@ QString BaseInstance::minecraftRoot() const
 
 InstanceList *BaseInstance::instList() const
 {
-	if (parent()->inherits("InstanceList"))
-		return (InstanceList *)parent();
-	else
-		return NULL;
+	return qobject_cast<InstanceList *>(parent());
+}
+
+InstancePtr BaseInstance::getSharedPtr()
+{
+	return instList()->getInstanceById(id());
 }
 
 std::shared_ptr<BaseVersionList> BaseInstance::versionList() const
@@ -160,13 +163,12 @@ SettingsObject &BaseInstance::settings() const
 	return *d->m_settings;
 }
 
-QSet<BaseInstance::InstanceFlag> BaseInstance::flags() const
+BaseInstance::InstanceFlags BaseInstance::flags() const
 {
 	I_D(const BaseInstance);
-	return QSet<InstanceFlag>(d->m_flags);
+	return d->m_flags;
 }
-
-void BaseInstance::setFlags(const QSet<InstanceFlag> &flags)
+void BaseInstance::setFlags(const InstanceFlags &flags)
 {
 	I_D(BaseInstance);
 	if (flags != d->m_flags)
@@ -176,10 +178,24 @@ void BaseInstance::setFlags(const QSet<InstanceFlag> &flags)
 		emit propertiesChanged(this);
 	}
 }
+void BaseInstance::setFlag(const BaseInstance::InstanceFlag flag)
+{
+	I_D(BaseInstance);
+	d->m_flags |= flag;
+	emit flagsChanged();
+	emit propertiesChanged(this);
+}
+void BaseInstance::unsetFlag(const BaseInstance::InstanceFlag flag)
+{
+	I_D(BaseInstance);
+	d->m_flags &= ~flag;
+	emit flagsChanged();
+	emit propertiesChanged(this);
+}
 
 bool BaseInstance::canLaunch() const
 {
-	return !flags().contains(VersionBrokenFlag);
+	return !(flags() & VersionBrokenFlag);
 }
 
 bool BaseInstance::reload()
diff --git a/logic/BaseInstance.h b/logic/BaseInstance.h
index 0cd17de9..ed5840e2 100644
--- a/logic/BaseInstance.h
+++ b/logic/BaseInstance.h
@@ -34,6 +34,10 @@ class OneSixUpdate;
 class InstanceList;
 class BaseInstancePrivate;
 
+// pointer for lazy people
+class BaseInstance;
+typedef std::shared_ptr<BaseInstance> InstancePtr;
+
 /*!
  * \brief Base class for instances.
  * This class implements many functions that are common between instances and
@@ -163,6 +167,8 @@ public:
 	 */
 	InstanceList *instList() const;
 
+	InstancePtr getSharedPtr();
+
 	/*!
 	 * \brief Gets a pointer to this instance's version list.
 	 * \return A pointer to the available version list for this instance.
@@ -193,11 +199,14 @@ public:
 
 	enum InstanceFlag
 	{
-		NoFlags = 0x00,
-		VersionBrokenFlag = 0x01
+		VersionBrokenFlag = 0x01,
+		UpdateAvailable = 0x02
 	};
-	QSet<InstanceFlag> flags() const;
-	void setFlags(const QSet<InstanceFlag> &flags);
+	Q_DECLARE_FLAGS(InstanceFlags, InstanceFlag)
+	InstanceFlags flags() const;
+	void setFlags(const InstanceFlags &flags);
+	void setFlag(const InstanceFlag flag);
+	void unsetFlag(const InstanceFlag flag);
 
 	bool canLaunch() const;
 
@@ -226,7 +235,6 @@ protected:
 	std::shared_ptr<BaseInstancePrivate> inst_d;
 };
 
-// pointer for lazy people
-typedef std::shared_ptr<BaseInstance> InstancePtr;
-
+Q_DECLARE_METATYPE(std::shared_ptr<BaseInstance>)
 Q_DECLARE_METATYPE(BaseInstance::InstanceFlag)
+Q_DECLARE_OPERATORS_FOR_FLAGS(BaseInstance::InstanceFlags)
diff --git a/logic/BaseInstance_p.h b/logic/BaseInstance_p.h
index 77486abc..3d1a4cbe 100644
--- a/logic/BaseInstance_p.h
+++ b/logic/BaseInstance_p.h
@@ -31,6 +31,6 @@ public:
 	QString m_rootDir;
 	QString m_group;
 	std::shared_ptr<SettingsObject> m_settings;
-	QSet<BaseInstance::InstanceFlag> m_flags;
+	BaseInstance::InstanceFlags m_flags;
 	bool m_isRunning = false;
 };
diff --git a/logic/BaseVersion.h b/logic/BaseVersion.h
index ed63f551..04d0a10b 100644
--- a/logic/BaseVersion.h
+++ b/logic/BaseVersion.h
@@ -24,6 +24,7 @@
  */
 struct BaseVersion
 {
+	virtual ~BaseVersion() {}
 	/*!
 	 * A string used to identify this version in config files.
 	 * This should be unique within the version list or shenanigans will occur.
diff --git a/logic/InstanceFactory.cpp b/logic/InstanceFactory.cpp
index f0f7ffb3..e1cc64df 100644
--- a/logic/InstanceFactory.cpp
+++ b/logic/InstanceFactory.cpp
@@ -52,19 +52,19 @@ InstanceFactory::InstLoadError InstanceFactory::loadInstance(InstancePtr &inst,
 	// FIXME: replace with a map lookup, where instance classes register their types
 	if (inst_type == "OneSix" || inst_type == "Nostalgia")
 	{
-		inst.reset(new OneSixInstance(instDir, m_settings, this));
+		inst.reset(new OneSixInstance(instDir, m_settings));
 	}
 	else if (inst_type == "Legacy")
 	{
-		inst.reset(new LegacyInstance(instDir, m_settings, this));
+		inst.reset(new LegacyInstance(instDir, m_settings));
 	}
 	else if (inst_type == "LegacyFTB")
 	{
-		inst.reset(new LegacyFTBInstance(instDir, m_settings, this));
+		inst.reset(new LegacyFTBInstance(instDir, m_settings));
 	}
 	else if (inst_type == "OneSixFTB")
 	{
-		inst.reset(new OneSixFTBInstance(instDir, m_settings, this));
+		inst.reset(new OneSixFTBInstance(instDir, m_settings));
 	}
 	else
 	{
@@ -82,11 +82,15 @@ InstanceFactory::InstCreateError InstanceFactory::createInstance(InstancePtr &in
 	QLOG_DEBUG() << instDir.toUtf8();
 	if (!rootDir.exists() && !rootDir.mkpath("."))
 	{
+		QLOG_ERROR() << "Can't create instance folder" << instDir;
 		return InstanceFactory::CantCreateDir;
 	}
 	auto mcVer = std::dynamic_pointer_cast<MinecraftVersion>(version);
 	if (!mcVer)
+	{
+		QLOG_ERROR() << "Can't create instance for non-existing MC version";
 		return InstanceFactory::NoSuchVersion;
+	}
 
 	auto m_settings = new INISettingsObject(PathCombine(instDir, "instance.cfg"));
 	m_settings->registerSetting("InstanceType", "Legacy");
@@ -94,7 +98,7 @@ InstanceFactory::InstCreateError InstanceFactory::createInstance(InstancePtr &in
 	if (type == NormalInst)
 	{
 		m_settings->set("InstanceType", "OneSix");
-		inst.reset(new OneSixInstance(instDir, m_settings, this));
+		inst.reset(new OneSixInstance(instDir, m_settings));
 		inst->setIntendedVersionId(version->descriptor());
 		inst->setShouldUseCustomBaseJar(false);
 	}
@@ -103,14 +107,14 @@ InstanceFactory::InstCreateError InstanceFactory::createInstance(InstancePtr &in
 		if(mcVer->usesLegacyLauncher())
 		{
 			m_settings->set("InstanceType", "LegacyFTB");
-			inst.reset(new LegacyFTBInstance(instDir, m_settings, this));
+			inst.reset(new LegacyFTBInstance(instDir, m_settings));
 			inst->setIntendedVersionId(version->descriptor());
 			inst->setShouldUseCustomBaseJar(false);
 		}
 		else
 		{
 			m_settings->set("InstanceType", "OneSixFTB");
-			inst.reset(new OneSixFTBInstance(instDir, m_settings, this));
+			inst.reset(new OneSixFTBInstance(instDir, m_settings));
 			inst->setIntendedVersionId(version->descriptor());
 			inst->setShouldUseCustomBaseJar(false);
 		}
diff --git a/logic/InstanceFactory.h b/logic/InstanceFactory.h
index 32a31080..3a4a55a8 100644
--- a/logic/InstanceFactory.h
+++ b/logic/InstanceFactory.h
@@ -26,7 +26,7 @@ struct BaseVersion;
 class BaseInstance;
 
 /*!
- * The \bInstanceFactory\b is a singleton that manages loading and creating instances.
+ * The \b InstanceFactory\b is a singleton that manages loading and creating instances.
  */
 class InstanceFactory : public QObject
 {
diff --git a/logic/LegacyFTBInstance.cpp b/logic/LegacyFTBInstance.cpp
index 73a1f73d..06bef948 100644
--- a/logic/LegacyFTBInstance.cpp
+++ b/logic/LegacyFTBInstance.cpp
@@ -7,7 +7,7 @@ LegacyFTBInstance::LegacyFTBInstance(const QString &rootDir, SettingsObject *set
 
 QString LegacyFTBInstance::getStatusbarDescription()
 {
-	if (flags().contains(VersionBrokenFlag))
+	if (flags() & VersionBrokenFlag)
 	{
 		return "Legacy FTB: " + intendedVersionId() + " (broken)";
 	}
diff --git a/logic/LegacyInstance.cpp b/logic/LegacyInstance.cpp
index 0239a325..eede7070 100644
--- a/logic/LegacyInstance.cpp
+++ b/logic/LegacyInstance.cpp
@@ -287,7 +287,7 @@ QString LegacyInstance::defaultCustomBaseJar() const
 
 QString LegacyInstance::getStatusbarDescription()
 {
-	if (flags().contains(VersionBrokenFlag))
+	if (flags() & VersionBrokenFlag)
 	{
 		return tr("Legacy : %1 (broken)").arg(intendedVersionId());
 	}
diff --git a/logic/MMCJson.cpp b/logic/MMCJson.cpp
index 8de88b6b..23af4fff 100644
--- a/logic/MMCJson.cpp
+++ b/logic/MMCJson.cpp
@@ -1,13 +1,26 @@
 #include "MMCJson.h"
+
 #include <QString>
+#include <QUrl>
 #include <QStringList>
 #include <math.h>
 
+QJsonDocument MMCJson::parseDocument(const QByteArray &data, const QString &what)
+{
+	QJsonParseError error;
+	QJsonDocument doc = QJsonDocument::fromJson(data, &error);
+	if (error.error != QJsonParseError::NoError)
+	{
+		throw JSONValidationError(what + " is not valid JSON: " + error.errorString() + " at " + error.offset);
+	}
+	return doc;
+}
+
 bool MMCJson::ensureBoolean(const QJsonValue val, const QString what)
 {
 	if (!val.isBool())
 		throw JSONValidationError(what + " is not boolean");
-	return val.isBool();
+	return val.toBool();
 }
 
 QJsonValue MMCJson::ensureExists(QJsonValue val, const QString what)
@@ -24,6 +37,15 @@ QJsonArray MMCJson::ensureArray(const QJsonValue val, const QString what)
 	return val.toArray();
 }
 
+QJsonArray MMCJson::ensureArray(const QJsonDocument &val, const QString &what)
+{
+	if (!val.isArray())
+	{
+		throw JSONValidationError(what + " is not an array");
+	}
+	return val.array();
+}
+
 double MMCJson::ensureDouble(const QJsonValue val, const QString what)
 {
 	if (!val.isDouble())
@@ -60,9 +82,36 @@ QString MMCJson::ensureString(const QJsonValue val, const QString what)
 	return val.toString();
 }
 
+QUrl MMCJson::ensureUrl(const QJsonValue &val, const QString &what)
+{
+	const QUrl url = QUrl(ensureString(val, what));
+	if (!url.isValid())
+	{
+		throw JSONValidationError(what + " is not an url");
+	}
+	return url;
+}
+
+QJsonDocument MMCJson::parseFile(const QString &filename, const QString &what)
+{
+	QFile f(filename);
+	if (!f.open(QFile::ReadOnly))
+	{
+		throw FileOpenError(f);
+	}
+	return parseDocument(f.readAll(), what);
+}
+
+int MMCJson::ensureInteger(const QJsonValue val, QString what, const int def)
+{
+	if (val.isUndefined())
+		return def;
+	return ensureInteger(val, what);
+}
+
 void MMCJson::writeString(QJsonObject &to, QString key, QString value)
 {
-	if(value.size())
+	if (!value.isEmpty())
 	{
 		to.insert(key, value);
 	}
@@ -70,7 +119,7 @@ void MMCJson::writeString(QJsonObject &to, QString key, QString value)
 
 void MMCJson::writeStringList(QJsonObject &to, QString key, QStringList values)
 {
-	if(values.size())
+	if (!values.isEmpty())
 	{
 		QJsonArray array;
 		for(auto value: values)
@@ -81,3 +130,13 @@ void MMCJson::writeStringList(QJsonObject &to, QString key, QStringList values)
 	}
 }
 
+QStringList MMCJson::ensureStringList(const QJsonValue val, QString what)
+{
+	const QJsonArray array = ensureArray(val, what);
+	QStringList out;
+	for (const auto value : array)
+	{
+		out.append(ensureString(value));
+	}
+	return out;
+}
diff --git a/logic/MMCJson.h b/logic/MMCJson.h
index 8408f29b..dc0b4224 100644
--- a/logic/MMCJson.h
+++ b/logic/MMCJson.h
@@ -9,17 +9,29 @@
 #include <QJsonObject>
 #include <QJsonDocument>
 #include <QJsonArray>
+#include <QFile>
+#include <memory>
 #include "MMCError.h"
 
 class JSONValidationError : public MMCError
 {
 public:
-	JSONValidationError(QString cause) : MMCError(cause) {};
-	virtual ~JSONValidationError() noexcept {}
+	JSONValidationError(QString cause) : MMCError(cause) {}
+};
+class FileOpenError : public MMCError
+{
+public:
+	FileOpenError(const QFile &file) : MMCError(QObject::tr("Error opening %1: %2").arg(file.fileName(), file.errorString())) {}
 };
 
 namespace MMCJson
 {
+/// parses the data into a json document. throws if there's a parse error
+QJsonDocument parseDocument(const QByteArray &data, const QString &what);
+
+/// tries to open and then parses the specified file. throws if there's an error
+QJsonDocument parseFile(const QString &filename, const QString &what);
+
 /// make sure the value exists. throw otherwise.
 QJsonValue ensureExists(QJsonValue val, const QString what = "value");
 
@@ -27,39 +39,63 @@ QJsonValue ensureExists(QJsonValue val, const QString what = "value");
 QJsonObject ensureObject(const QJsonValue val, const QString what = "value");
 
 /// make sure the document is converted into an object. throw otherwise.
-QJsonObject ensureObject(const QJsonDocument val, const QString what = "value");
+QJsonObject ensureObject(const QJsonDocument val, const QString what = "document");
 
 /// make sure the value is converted into an array. throw otherwise.
 QJsonArray ensureArray(const QJsonValue val, QString what = "value");
 
+/// make sure the document is converted into an array. throw otherwise.
+QJsonArray ensureArray(const QJsonDocument &val, const QString &what = "document");
+
 /// make sure the value is converted into a string. throw otherwise.
 QString ensureString(const QJsonValue val, QString what = "value");
 
+/// make sure the value is converted into a string that's parseable as an url. throw otherwise.
+QUrl ensureUrl(const QJsonValue &val, const QString &what = "value");
+
 /// make sure the value is converted into a boolean. throw otherwise.
 bool ensureBoolean(const QJsonValue val, QString what = "value");
 
 /// make sure the value is converted into an integer. throw otherwise.
 int ensureInteger(const QJsonValue val, QString what = "value");
 
+/// make sure the value is converted into an integer. throw otherwise. this version will return the default value if the field is undefined.
+int ensureInteger(const QJsonValue val, QString what, const int def);
+
 /// make sure the value is converted into a double precision floating number. throw otherwise.
 double ensureDouble(const QJsonValue val, QString what = "value");
 
+QStringList ensureStringList(const QJsonValue val, QString what);
+
 void writeString(QJsonObject & to, QString key, QString value);
 
-void writeStringList (QJsonObject & to, QString key, QStringList values);
+void writeStringList(QJsonObject & to, QString key, QStringList values);
 
 template <typename T>
-void writeObjectList (QJsonObject & to, QString key, QList<T> values)
+void writeObjectList(QJsonObject & to, QString key, QList<std::shared_ptr<T>> values)
 {
-	if(values.size())
+	if (!values.isEmpty())
 	{
 		QJsonArray array;
-		for(auto value: values)
+		for (auto value: values)
 		{
 			array.append(value->toJson());
 		}
 		to.insert(key, array);
 	}
 }
+template <typename T>
+void writeObjectList(QJsonObject & to, QString key, QList<T> values)
+{
+	if (!values.isEmpty())
+	{
+		QJsonArray array;
+		for (auto value: values)
+		{
+			array.append(value.toJson());
+		}
+		to.insert(key, array);
+	}
+}
 }
 
diff --git a/logic/OneSixFTBInstance.cpp b/logic/OneSixFTBInstance.cpp
index 8dfd3051..903c4437 100644
--- a/logic/OneSixFTBInstance.cpp
+++ b/logic/OneSixFTBInstance.cpp
@@ -118,7 +118,7 @@ bool OneSixFTBInstance::providesVersionFile() const
 
 QString OneSixFTBInstance::getStatusbarDescription()
 {
-	if (flags().contains(VersionBrokenFlag))
+	if (flags() & VersionBrokenFlag)
 	{
 		return "OneSix FTB: " + intendedVersionId() + " (broken)";
 	}
diff --git a/logic/OneSixInstance.cpp b/logic/OneSixInstance.cpp
index 82d4e480..00d8a9db 100644
--- a/logic/OneSixInstance.cpp
+++ b/logic/OneSixInstance.cpp
@@ -418,7 +418,7 @@ void OneSixInstance::reloadVersion()
 	try
 	{
 		d->version->reload(externalPatches());
-		d->m_flags.remove(VersionBrokenFlag);
+		unsetFlag(VersionBrokenFlag);
 		emit versionReloaded();
 	}
 	catch (VersionIncomplete &error)
@@ -427,7 +427,7 @@ void OneSixInstance::reloadVersion()
 	catch (MMCError &error)
 	{
 		d->version->clear();
-		d->m_flags.insert(VersionBrokenFlag);
+		setFlag(VersionBrokenFlag);
 		// TODO: rethrow to show some error message(s)?
 		emit versionReloaded();
 		throw;
@@ -464,7 +464,7 @@ QString OneSixInstance::getStatusbarDescription()
 	{
 		traits.append(tr("custom"));
 	}
-	if (flags().contains(VersionBrokenFlag))
+	if (flags() & VersionBrokenFlag)
 	{
 		traits.append(tr("broken"));
 	}
@@ -569,3 +569,8 @@ QStringList OneSixInstance::extraArguments() const
 	}
 	return list;
 }
+
+std::shared_ptr<OneSixInstance> OneSixInstance::getSharedPtr()
+{
+	return std::dynamic_pointer_cast<OneSixInstance>(BaseInstance::getSharedPtr());
+}
diff --git a/logic/OneSixInstance.h b/logic/OneSixInstance.h
index 75caef1f..f7b01608 100644
--- a/logic/OneSixInstance.h
+++ b/logic/OneSixInstance.h
@@ -96,8 +96,11 @@ public:
 	virtual bool providesVersionFile() const;
 
 	bool reload() override;
+
 	virtual QStringList extraArguments() const override;
-	
+
+	std::shared_ptr<OneSixInstance> getSharedPtr();
+
 signals:
 	void versionReloaded();
 
@@ -105,3 +108,5 @@ private:
 	QStringList processMinecraftArgs(AuthSessionPtr account);
 	QDir reconstructAssets(std::shared_ptr<InstanceVersion> version);
 };
+
+Q_DECLARE_METATYPE(std::shared_ptr<OneSixInstance>)
diff --git a/logic/forge/ForgeInstaller.h b/logic/forge/ForgeInstaller.h
index 1c7452d7..655fbc89 100644
--- a/logic/forge/ForgeInstaller.h
+++ b/logic/forge/ForgeInstaller.h
@@ -29,11 +29,11 @@ class ForgeInstaller : public BaseInstaller
 	friend class ForgeInstallTask;
 public:
 	ForgeInstaller();
-	virtual ~ForgeInstaller(){};
+	virtual ~ForgeInstaller(){}
 	virtual ProgressProvider *createInstallTask(OneSixInstance *instance, BaseVersionPtr version, QObject *parent) override;
+	virtual QString id() const override { return "net.minecraftforge"; }
 
 protected:
-	virtual QString id() const override { return "net.minecraftforge"; }
 	void prepare(const QString &filename, const QString &universalUrl);
 	bool add(OneSixInstance *to) override;
 	bool addLegacy(OneSixInstance *to);
diff --git a/logic/forge/ForgeVersion.h b/logic/forge/ForgeVersion.h
index c7adc572..e3c1aab9 100644
--- a/logic/forge/ForgeVersion.h
+++ b/logic/forge/ForgeVersion.h
@@ -38,3 +38,5 @@ struct ForgeVersion : public BaseVersion
 	QString installer_filename;
 	bool is_recommended = false;
 };
+
+Q_DECLARE_METATYPE(ForgeVersionPtr)
diff --git a/logic/java/JavaCheckerJob.h b/logic/java/JavaCheckerJob.h
index 132a92d4..4b79611b 100644
--- a/logic/java/JavaCheckerJob.h
+++ b/logic/java/JavaCheckerJob.h
@@ -59,22 +59,10 @@ public:
 	{
 		return javacheckers.size();
 	}
-	virtual void getProgress(qint64 &current, qint64 &total)
-	{
-		current = current_progress;
-		total = total_progress;
-	}
-	;
-	virtual QString getStatus() const
-	{
-		return m_job_name;
-	}
-	;
 	virtual bool isRunning() const
 	{
 		return m_running;
 	}
-	;
 
 signals:
 	void started();
diff --git a/logic/liteloader/LiteLoaderInstaller.h b/logic/liteloader/LiteLoaderInstaller.h
index 43ad6b83..b3336bbd 100644
--- a/logic/liteloader/LiteLoaderInstaller.h
+++ b/logic/liteloader/LiteLoaderInstaller.h
@@ -28,13 +28,10 @@ public:
 
 	void prepare(LiteLoaderVersionPtr version);
 	bool add(OneSixInstance *to) override;
+	virtual QString id() const override { return "com.mumfrey.liteloader"; }
 
 	ProgressProvider *createInstallTask(OneSixInstance *instance, BaseVersionPtr version, QObject *parent) override;
 
 private:
-	virtual QString id() const override
-	{
-		return "com.mumfrey.liteloader";
-	}
 	LiteLoaderVersionPtr m_version;
 };
diff --git a/logic/liteloader/LiteLoaderVersionList.h b/logic/liteloader/LiteLoaderVersionList.h
index 91ed077c..5eecd926 100644
--- a/logic/liteloader/LiteLoaderVersionList.h
+++ b/logic/liteloader/LiteLoaderVersionList.h
@@ -111,3 +111,5 @@ protected:
 	CacheDownloadPtr listDownload;
 	LiteLoaderVersionList *m_list;
 };
+
+Q_DECLARE_METATYPE(LiteLoaderVersionPtr)
diff --git a/logic/minecraft/InstanceVersion.cpp b/logic/minecraft/InstanceVersion.cpp
index c345e1fb..a243ebf4 100644
--- a/logic/minecraft/InstanceVersion.cpp
+++ b/logic/minecraft/InstanceVersion.cpp
@@ -264,6 +264,14 @@ QList<std::shared_ptr<OneSixLibrary> > InstanceVersion::getActiveNormalLibs()
 	{
 		if (lib->isActive() && !lib->isNative())
 		{
+			for (auto other : output)
+			{
+				if (other->rawName() == lib->rawName())
+				{
+					QLOG_WARN() << "Multiple libraries with name" << lib->rawName() << "in library list!";
+					continue;
+				}
+			}
 			output.append(lib);
 		}
 	}
diff --git a/logic/minecraft/InstanceVersion.h b/logic/minecraft/InstanceVersion.h
index 6b69ab47..664e4242 100644
--- a/logic/minecraft/InstanceVersion.h
+++ b/logic/minecraft/InstanceVersion.h
@@ -140,10 +140,10 @@ public:
 	QString appletClass;
 	
 	/// the list of libs - both active and inactive, native and java
-	QList<std::shared_ptr<OneSixLibrary>> libraries;
-	
+	QList<OneSixLibraryPtr> libraries;
+
 	/// same, but only vanilla.
-	QList<std::shared_ptr<OneSixLibrary>> vanillaLibraries;
+	QList<OneSixLibraryPtr> vanillaLibraries;
 
 	/// traits, collected from all the version files (version files can only add)
 	QSet<QString> traits;
diff --git a/logic/minecraft/MinecraftVersionList.cpp b/logic/minecraft/MinecraftVersionList.cpp
index bde2170b..598fecdb 100644
--- a/logic/minecraft/MinecraftVersionList.cpp
+++ b/logic/minecraft/MinecraftVersionList.cpp
@@ -116,15 +116,10 @@ void MinecraftVersionList::loadBuiltinList()
 {
 	QLOG_INFO() << "Loading builtin version list.";
 	// grab the version list data from internal resources.
-	QResource versionList(":/versions/minecraft.json");
-	QFile filez(versionList.absoluteFilePath());
-	filez.open(QIODevice::ReadOnly);
-	auto data = filez.readAll();
-
-	// parse the data as json
-	QJsonParseError jsonError;
-	QJsonDocument jsonDoc = QJsonDocument::fromJson(data, &jsonError);
-	QJsonObject root = jsonDoc.object();
+	const QJsonDocument doc =
+		MMCJson::parseFile(":/versions/minecraft.json",
+						   "builtin version list");
+	const QJsonObject root = doc.object();
 
 	// parse all the versions
 	for (const auto version : MMCJson::ensureArray(root.value("versions")))
diff --git a/logic/minecraft/OneSixLibrary.h b/logic/minecraft/OneSixLibrary.h
index 2f60405a..1d2ac0cb 100644
--- a/logic/minecraft/OneSixLibrary.h
+++ b/logic/minecraft/OneSixLibrary.h
@@ -48,5 +48,4 @@ public:
 	/// Constructor
 	OneSixLibrary(RawLibraryPtr base);
 	static OneSixLibraryPtr fromRawLibrary(RawLibraryPtr lib);
-	
 };
diff --git a/logic/minecraft/VersionBuilder.cpp b/logic/minecraft/VersionBuilder.cpp
index dbaf5257..09f761a4 100644
--- a/logic/minecraft/VersionBuilder.cpp
+++ b/logic/minecraft/VersionBuilder.cpp
@@ -288,6 +288,11 @@ static const int currentOrderFileVersion = 1;
 bool VersionBuilder::readOverrideOrders(OneSixInstance *instance, PatchOrder &order)
 {
 	QFile orderFile(instance->instanceRoot() + "/order.json");
+	if (!orderFile.exists())
+	{
+		QLOG_WARN() << "Order file doesn't exist. Ignoring.";
+		return false;
+	}
 	if (!orderFile.open(QFile::ReadOnly))
 	{
 		QLOG_ERROR() << "Couldn't open" << orderFile.fileName()
diff --git a/logic/minecraft/VersionFile.cpp b/logic/minecraft/VersionFile.cpp
index 778c5a27..311271fe 100644
--- a/logic/minecraft/VersionFile.cpp
+++ b/logic/minecraft/VersionFile.cpp
@@ -22,8 +22,7 @@ int findLibraryByName(QList<OneSixLibraryPtr> haystack, const GradleSpecifier &n
 	int retval = -1;
 	for (int i = 0; i < haystack.size(); ++i)
 	{
-		
-		if(haystack.at(i)->rawName().matchName(needle))
+		if (haystack.at(i)->rawName().matchName(needle))
 		{
 			// only one is allowed.
 			if (retval != -1)
@@ -67,7 +66,7 @@ VersionFilePtr VersionFile::fromJson(const QJsonDocument &doc, const QString &fi
 	out->mcVersion = root.value("mcVersion").toString();
 	out->filename = filename;
 
-	auto readString = [root](const QString & key, QString & variable)
+	auto readString = [root](const QString &key, QString &variable)
 	{
 		if (root.contains(key))
 		{
@@ -75,15 +74,14 @@ VersionFilePtr VersionFile::fromJson(const QJsonDocument &doc, const QString &fi
 		}
 	};
 
-	auto readStringRet = [root](const QString & key)->QString
+	auto readStringRet = [root](const QString &key) -> QString
 	{
 		if (root.contains(key))
 		{
 			return ensureString(root.value(key));
 		}
 		return QString();
-	}
-	;
+	};
 
 	// FIXME: This should be ignored when applying.
 	if (!isFTB)
diff --git a/logic/net/ByteArrayDownload.cpp b/logic/net/ByteArrayDownload.cpp
index 27d2a250..a8d1d330 100644
--- a/logic/net/ByteArrayDownload.cpp
+++ b/logic/net/ByteArrayDownload.cpp
@@ -53,16 +53,42 @@ void ByteArrayDownload::downloadError(QNetworkReply::NetworkError error)
 	QLOG_ERROR() << "Error getting URL:" << m_url.toString().toLocal8Bit()
 				 << "Network error: " << error;
 	m_status = Job_Failed;
+	m_errorString = m_reply->errorString();
 }
 
 void ByteArrayDownload::downloadFinished()
 {
+	if (m_followRedirects)
+	{
+		QVariant redirect = m_reply->header(QNetworkRequest::LocationHeader);
+		QString redirectURL;
+		if(redirect.isValid())
+		{
+			redirectURL = redirect.toString();
+		}
+		// FIXME: This is a hack for https://bugreports.qt-project.org/browse/QTBUG-41061
+		else if(m_reply->hasRawHeader("Location"))
+		{
+			auto data = m_reply->rawHeader("Location");
+			if(data.size() > 2 && data[0] == '/' && data[1] == '/')
+				redirectURL = m_reply->url().scheme() + ":" + data;
+		}
+		if (!redirectURL.isEmpty())
+		{
+			m_url = QUrl(redirect.toString());
+			QLOG_INFO() << "Following redirect to " << m_url.toString();
+			start();
+			return;
+		}
+	}
+
 	// if the download succeeded
 	if (m_status != Job_Failed)
 	{
 		// nothing went wrong...
 		m_status = Job_Finished;
 		m_data = m_reply->readAll();
+		m_content_type = m_reply->header(QNetworkRequest::ContentTypeHeader).toString();
 		m_reply.reset();
 		emit succeeded(m_index_within_job);
 		return;
diff --git a/logic/net/ByteArrayDownload.h b/logic/net/ByteArrayDownload.h
index 76e2e279..85ed2dab 100644
--- a/logic/net/ByteArrayDownload.h
+++ b/logic/net/ByteArrayDownload.h
@@ -31,6 +31,10 @@ public:
 	/// if not saving to file, downloaded data is placed here
 	QByteArray m_data;
 
+	QString m_errorString;
+
+	bool m_followRedirects = false;
+
 public
 slots:
 	virtual void start();
diff --git a/logic/net/CacheDownload.cpp b/logic/net/CacheDownload.cpp
index d2a9bdee..6d937e30 100644
--- a/logic/net/CacheDownload.cpp
+++ b/logic/net/CacheDownload.cpp
@@ -101,6 +101,30 @@ void CacheDownload::downloadError(QNetworkReply::NetworkError error)
 }
 void CacheDownload::downloadFinished()
 {
+	if (m_followRedirects)
+	{
+		QVariant redirect = m_reply->header(QNetworkRequest::LocationHeader);
+		QString redirectURL;
+		if(redirect.isValid())
+		{
+			redirectURL = redirect.toString();
+		}
+		// FIXME: This is a hack for https://bugreports.qt-project.org/browse/QTBUG-41061
+		else if(m_reply->hasRawHeader("Location"))
+		{
+			auto data = m_reply->rawHeader("Location");
+			if(data.size() > 2 && data[0] == '/' && data[1] == '/')
+				redirectURL = m_reply->url().scheme() + ":" + data;
+		}
+		if (!redirectURL.isEmpty())
+		{
+			m_url = QUrl(redirect.toString());
+			QLOG_INFO() << "Following redirect to " << m_url.toString();
+			start();
+			return;
+		}
+	}
+
 	// if the download succeeded
 	if (m_status == Job_Failed)
 	{
diff --git a/logic/net/CacheDownload.h b/logic/net/CacheDownload.h
index d446d23e..9eb69fcd 100644
--- a/logic/net/CacheDownload.h
+++ b/logic/net/CacheDownload.h
@@ -36,6 +36,8 @@ private:
 	bool wroteAnyData = false;
 
 public:
+	bool m_followRedirects = false;
+
 	explicit CacheDownload(QUrl url, MetaEntryPtr entry);
 	static CacheDownloadPtr make(QUrl url, MetaEntryPtr entry)
 	{
diff --git a/logic/net/NetAction.h b/logic/net/NetAction.h
index 97c96e5d..fdd69eec 100644
--- a/logic/net/NetAction.h
+++ b/logic/net/NetAction.h
@@ -55,6 +55,9 @@ public:
 	/// the network reply
 	std::shared_ptr<QNetworkReply> m_reply;
 
+	/// the content of the content-type header
+	QString m_content_type;
+
 	/// source URL
 	QUrl m_url;
 
diff --git a/logic/net/NetJob.h b/logic/net/NetJob.h
index d05e7b6f..8fc04d06 100644
--- a/logic/net/NetJob.h
+++ b/logic/net/NetJob.h
@@ -30,8 +30,8 @@ class NetJob : public ProgressProvider
 {
 	Q_OBJECT
 public:
-	explicit NetJob(QString job_name) : ProgressProvider(), m_job_name(job_name) {};
-	virtual ~NetJob() {};
+	explicit NetJob(QString job_name) : ProgressProvider(), m_job_name(job_name) {}
+	virtual ~NetJob() {}
 	template <typename T> bool addNetAction(T action)
 	{
 		NetActionPtr base = std::static_pointer_cast<NetAction>(action);
@@ -62,7 +62,10 @@ public:
 	{
 		return downloads[index];
 	}
-	;
+	const NetActionPtr at(const int index)
+	{
+		return downloads.at(index);
+	}
 	NetActionPtr first()
 	{
 		if (downloads.size())
@@ -73,21 +76,10 @@ public:
 	{
 		return downloads.size();
 	}
-	virtual void getProgress(qint64 &current, qint64 &total)
-	{
-		current = current_progress;
-		total = total_progress;
-	}
-	;
-	virtual QString getStatus() const
-	{
-		return m_job_name;
-	}
 	virtual bool isRunning() const
 	{
 		return m_running;
 	}
-	;
 	QStringList getFailedFiles();
 signals:
 	void started();
diff --git a/logic/tasks/ProgressProvider.h b/logic/tasks/ProgressProvider.h
index dcb71139..f6928e1c 100644
--- a/logic/tasks/ProgressProvider.h
+++ b/logic/tasks/ProgressProvider.h
@@ -32,9 +32,7 @@ signals:
 	void status(QString status);
 
 public:
-	virtual ~ProgressProvider() {};
-	virtual QString getStatus() const = 0;
-	virtual void getProgress(qint64 &current, qint64 &total) = 0;
+	virtual ~ProgressProvider() {}
 	virtual bool isRunning() const = 0;
 public
 slots:
diff --git a/logic/tasks/SequentialTask.cpp b/logic/tasks/SequentialTask.cpp
index e0f8fcdd..e08206f8 100644
--- a/logic/tasks/SequentialTask.cpp
+++ b/logic/tasks/SequentialTask.cpp
@@ -1,31 +1,7 @@
 #include "SequentialTask.h"
 
-SequentialTask::SequentialTask(QObject *parent) :
-	Task(parent), m_currentIndex(-1)
+SequentialTask::SequentialTask(QObject *parent) : Task(parent), m_currentIndex(-1)
 {
-
-}
-
-QString SequentialTask::getStatus() const
-{
-	if (m_queue.isEmpty() || m_currentIndex >= m_queue.size())
-	{
-		return QString();
-	}
-	return m_queue.at(m_currentIndex)->getStatus();
-}
-
-void SequentialTask::getProgress(qint64 &current, qint64 &total)
-{
-	current = 0;
-	total = 0;
-	for (int i = 0; i < m_queue.size(); ++i)
-	{
-		qint64 subCurrent, subTotal;
-		m_queue.at(i)->getProgress(subCurrent, subTotal);
-		current += subCurrent;
-		total += subTotal;
-	}
 }
 
 void SequentialTask::addTask(std::shared_ptr<ProgressProvider> task)
@@ -55,10 +31,9 @@ void SequentialTask::startNext()
 	std::shared_ptr<ProgressProvider> next = m_queue[m_currentIndex];
 	connect(next.get(), SIGNAL(failed(QString)), this, SLOT(subTaskFailed(QString)));
 	connect(next.get(), SIGNAL(status(QString)), this, SLOT(subTaskStatus(QString)));
-	connect(next.get(), SIGNAL(progress(qint64,qint64)), this, SLOT(subTaskProgress()));
+	connect(next.get(), SIGNAL(progress(qint64, qint64)), this, SLOT(subTaskProgress(qint64, qint64)));
 	connect(next.get(), SIGNAL(succeeded()), this, SLOT(startNext()));
 	next->start();
-	emit status(getStatus());
 }
 
 void SequentialTask::subTaskFailed(const QString &msg)
@@ -69,16 +44,16 @@ void SequentialTask::subTaskStatus(const QString &msg)
 {
 	setStatus(msg);
 }
-void SequentialTask::subTaskProgress()
+void SequentialTask::subTaskProgress(qint64 current, qint64 total)
 {
-	qint64 current, total;
-	getProgress(current, total);
-	if (total == 0)
+	if(total == 0)
 	{
 		setProgress(0);
+		return;
 	}
-	else
-	{
-		setProgress(100 * current / total);
-	}
+	auto dcurrent = (double) current;
+	auto dtotal = (double) total;
+	auto partial = ((dcurrent / dtotal) * 100.0f)/* / double(m_queue.size())*/;
+	// auto bigpartial = double(m_currentIndex) * 100.0f / double(m_queue.size());
+	setProgress(partial);
 }
diff --git a/logic/tasks/SequentialTask.h b/logic/tasks/SequentialTask.h
index c405dca3..f1fe9c72 100644
--- a/logic/tasks/SequentialTask.h
+++ b/logic/tasks/SequentialTask.h
@@ -11,9 +11,6 @@ class SequentialTask : public Task
 public:
 	explicit SequentialTask(QObject *parent = 0);
 
-	virtual QString getStatus() const;
-	virtual void getProgress(qint64 &current, qint64 &total);
-
 	void addTask(std::shared_ptr<ProgressProvider> task);
 
 protected:
@@ -24,7 +21,7 @@ slots:
 	void startNext();
 	void subTaskFailed(const QString &msg);
 	void subTaskStatus(const QString &msg);
-	void subTaskProgress();
+	void subTaskProgress(qint64 current, qint64 total);
 
 private:
 	QQueue<std::shared_ptr<ProgressProvider> > m_queue;
diff --git a/logic/tasks/Task.cpp b/logic/tasks/Task.cpp
index c980d6b3..f7a99cdf 100644
--- a/logic/tasks/Task.cpp
+++ b/logic/tasks/Task.cpp
@@ -20,29 +20,16 @@ Task::Task(QObject *parent) : ProgressProvider(parent)
 {
 }
 
-QString Task::getStatus() const
-{
-	return m_statusString;
-}
-
 void Task::setStatus(const QString &new_status)
 {
-	m_statusString = new_status;
 	emit status(new_status);
 }
 
 void Task::setProgress(int new_progress)
 {
-	m_progress = new_progress;
 	emit progress(new_progress, 100);
 }
 
-void Task::getProgress(qint64 &current, qint64 &total)
-{
-	current = m_progress;
-	total = 100;
-}
-
 void Task::start()
 {
 	m_running = true;
@@ -61,6 +48,7 @@ void Task::emitFailed(QString reason)
 
 void Task::emitSucceeded()
 {
+	if (!m_running) { return; } // Don't succeed twice.
 	m_running = false;
 	m_succeeded = true;
 	QLOG_INFO() << "Task succeeded";
diff --git a/logic/tasks/Task.h b/logic/tasks/Task.h
index 063eeeda..e6b09262 100644
--- a/logic/tasks/Task.h
+++ b/logic/tasks/Task.h
@@ -26,8 +26,6 @@ public:
 	explicit Task(QObject *parent = 0);
 	virtual ~Task() {};
 
-	virtual QString getStatus() const;
-	virtual void getProgress(qint64 &current, qint64 &total);
 	virtual bool isRunning() const;
 
 	/*!
@@ -50,6 +48,7 @@ slots:
 protected:
 	virtual void executeTask() = 0;
 
+protected slots:
 	virtual void emitSucceeded();
 	virtual void emitFailed(QString reason);
 
@@ -59,9 +58,8 @@ slots:
 	void setProgress(int progress);
 
 protected:
-	QString m_statusString;
-	int m_progress = 0;
 	bool m_running = false;
 	bool m_succeeded = false;
 	QString m_failReason = "";
 };
+
diff --git a/logic/tools/BaseExternalTool.h b/logic/tools/BaseExternalTool.h
index 7672bf10..5f112970 100644
--- a/logic/tools/BaseExternalTool.h
+++ b/logic/tools/BaseExternalTool.h
@@ -43,7 +43,7 @@ public:
 
 	virtual QString name() const = 0;
 
-	virtual void registerSettings(SettingsObject *settings) = 0;
+	virtual void registerSettings(std::shared_ptr<SettingsObject> settings) = 0;
 
 	virtual BaseExternalTool *createTool(InstancePtr instance, QObject *parent = 0) = 0;
 
diff --git a/logic/tools/JProfiler.cpp b/logic/tools/JProfiler.cpp
index 988a875a..2134984e 100644
--- a/logic/tools/JProfiler.cpp
+++ b/logic/tools/JProfiler.cpp
@@ -40,7 +40,7 @@ void JProfiler::beginProfilingImpl(MinecraftProcess *process)
 	m_profilerProcess = profiler;
 }
 
-void JProfilerFactory::registerSettings(SettingsObject *settings)
+void JProfilerFactory::registerSettings(std::shared_ptr<SettingsObject> settings)
 {
 	settings->registerSetting("JProfilerPath");
 	settings->registerSetting("JProfilerPort", 42042);
diff --git a/logic/tools/JProfiler.h b/logic/tools/JProfiler.h
index b3fa6ec7..3085511b 100644
--- a/logic/tools/JProfiler.h
+++ b/logic/tools/JProfiler.h
@@ -16,7 +16,7 @@ class JProfilerFactory : public BaseProfilerFactory
 {
 public:
 	QString name() const override { return "JProfiler"; }
-	void registerSettings(SettingsObject *settings) override;
+	void registerSettings(std::shared_ptr<SettingsObject> settings) override;
 	BaseExternalTool *createTool(InstancePtr instance, QObject *parent = 0) override;
 	bool check(QString *error) override;
 	bool check(const QString &path, QString *error) override;
diff --git a/logic/tools/JVisualVM.cpp b/logic/tools/JVisualVM.cpp
index 09ab1762..33e271b4 100644
--- a/logic/tools/JVisualVM.cpp
+++ b/logic/tools/JVisualVM.cpp
@@ -37,7 +37,7 @@ void JVisualVM::beginProfilingImpl(MinecraftProcess *process)
 	m_profilerProcess = profiler;
 }
 
-void JVisualVMFactory::registerSettings(SettingsObject *settings)
+void JVisualVMFactory::registerSettings(std::shared_ptr<SettingsObject> settings)
 {
 	QString defaultValue = QStandardPaths::findExecutable("jvisualvm");
 	if (defaultValue.isNull())
diff --git a/logic/tools/JVisualVM.h b/logic/tools/JVisualVM.h
index dffdde36..a646c681 100644
--- a/logic/tools/JVisualVM.h
+++ b/logic/tools/JVisualVM.h
@@ -16,7 +16,7 @@ class JVisualVMFactory : public BaseProfilerFactory
 {
 public:
 	QString name() const override { return "JVisualVM"; }
-	void registerSettings(SettingsObject *settings) override;
+	void registerSettings(std::shared_ptr<SettingsObject> settings) override;
 	BaseExternalTool *createTool(InstancePtr instance, QObject *parent = 0) override;
 	bool check(QString *error) override;
 	bool check(const QString &path, QString *error) override;
diff --git a/logic/tools/MCEditTool.cpp b/logic/tools/MCEditTool.cpp
index 91643585..1c7d9cd2 100644
--- a/logic/tools/MCEditTool.cpp
+++ b/logic/tools/MCEditTool.cpp
@@ -43,7 +43,7 @@ void MCEditTool::runImpl()
 #endif
 }
 
-void MCEditFactory::registerSettings(SettingsObject *settings)
+void MCEditFactory::registerSettings(std::shared_ptr<SettingsObject> settings)
 {
 	settings->registerSetting("MCEditPath");
 }
diff --git a/logic/tools/MCEditTool.h b/logic/tools/MCEditTool.h
index 9985bde1..810caf25 100644
--- a/logic/tools/MCEditTool.h
+++ b/logic/tools/MCEditTool.h
@@ -16,7 +16,7 @@ class MCEditFactory : public BaseDetachedToolFactory
 {
 public:
 	QString name() const override { return "MCEdit"; }
-	void registerSettings(SettingsObject *settings) override;
+	void registerSettings(std::shared_ptr<SettingsObject> settings) override;
 	BaseExternalTool *createTool(InstancePtr instance, QObject *parent = 0) override;
 	bool check(QString *error) override;
 	bool check(const QString &path, QString *error) override;