NOISSUE Rough refactor of ProfilePatch and VersionFile internals.

They are now distinct classes with distinct responsibilities.

* ProfilePatch is an entry in MinecraftProfile and can hold VersionFile or Meta::Version.
* VersionFile is the basic element that holds version information loaded from JSON.
* Meta::Version is the loader class for VersionFile(s) from a server.

20 files changed, 420 insertions, 363 deletions

diff --git a/api/logic/BaseVersionList.cpp b/api/logic/BaseVersionList.cpp
index 5ad4df3c..dae604a2 100644
--- a/api/logic/BaseVersionList.cpp
+++ b/api/logic/BaseVersionList.cpp
@@ -93,7 +93,7 @@ QHash<int, QByteArray> BaseVersionList::roleNames() const
 	QHash<int, QByteArray> roles = QAbstractListModel::roleNames();
 	roles.insert(VersionRole, "version");
 	roles.insert(VersionIdRole, "versionId");
-	roles.insert(ParentGameVersionRole, "parentGameVersion");
+	roles.insert(ParentVersionRole, "parentGameVersion");
 	roles.insert(RecommendedRole, "recommended");
 	roles.insert(LatestRole, "latest");
 	roles.insert(TypeRole, "type");
diff --git a/api/logic/BaseVersionList.h b/api/logic/BaseVersionList.h
index 8afcae1d..eb3b622a 100644
--- a/api/logic/BaseVersionList.h
+++ b/api/logic/BaseVersionList.h
@@ -45,7 +45,7 @@ public:
 		VersionPointerRole = Qt::UserRole,
 		VersionRole,
 		VersionIdRole,
-		ParentGameVersionRole,
+		ParentVersionRole,
 		RecommendedRole,
 		LatestRole,
 		TypeRole,
diff --git a/api/logic/CMakeLists.txt b/api/logic/CMakeLists.txt
index 7f04a41e..da673c13 100644
--- a/api/logic/CMakeLists.txt
+++ b/api/logic/CMakeLists.txt
@@ -267,6 +267,7 @@ set(MINECRAFT_SOURCES
 	minecraft/VersionBuildError.h
 	minecraft/VersionFile.cpp
 	minecraft/VersionFile.h
+	minecraft/ProfilePatch.cpp
 	minecraft/ProfilePatch.h
 	minecraft/VersionFilterData.h
 	minecraft/VersionFilterData.cpp
diff --git a/api/logic/ProblemProvider.h b/api/logic/ProblemProvider.h
new file mode 100644
index 00000000..64a31c59
--- /dev/null
+++ b/api/logic/ProblemProvider.h
@@ -0,0 +1,54 @@
+#pragma once
+
+enum class ProblemSeverity
+{
+	None,
+	Warning,
+	Error
+};
+
+class PatchProblem
+{
+public:
+	PatchProblem(ProblemSeverity severity, const QString & description)
+	{
+		m_severity = severity;
+		m_description = description;
+	}
+	const QString & getDescription() const
+	{
+		return m_description;
+	}
+	const ProblemSeverity getSeverity() const
+	{
+		return m_severity;
+	}
+private:
+	ProblemSeverity m_severity;
+	QString m_description;
+};
+
+class ProblemProvider
+{
+public:
+	virtual const QList<PatchProblem>& getProblems()
+	{
+		return m_problems;
+	}
+	virtual void addProblem(ProblemSeverity severity, const QString &description)
+	{
+		if(severity > m_problemSeverity)
+		{
+			m_problemSeverity = severity;
+		}
+		m_problems.append(PatchProblem(severity, description));
+	}
+	virtual ProblemSeverity getProblemSeverity()
+	{
+		return m_problemSeverity;
+	}
+
+private:
+	QList<PatchProblem> m_problems;
+	ProblemSeverity m_problemSeverity = ProblemSeverity::None;
+};
diff --git a/api/logic/meta/Version.cpp b/api/logic/meta/Version.cpp
index af9d4f10..2a8e1780 100644
--- a/api/logic/meta/Version.cpp
+++ b/api/logic/meta/Version.cpp
@@ -32,7 +32,7 @@ QString Meta::Version::descriptor()
 QString Meta::Version::name()
 {
 	if(m_data)
-		return m_data->getName();
+		return m_data->name;
 	return m_uid;
 }
 QString Meta::Version::typeString() const
diff --git a/api/logic/meta/VersionList.cpp b/api/logic/meta/VersionList.cpp
index c2712155..41ed1352 100644
--- a/api/logic/meta/VersionList.cpp
+++ b/api/logic/meta/VersionList.cpp
@@ -73,7 +73,7 @@ QVariant VersionList::data(const QModelIndex &index, int role) const
 	case VersionRole:
 	case VersionIdRole:
 		return version->version();
-	case ParentGameVersionRole:
+	case ParentVersionRole:
 	{
 		auto parentUid = this->parentUid();
 		if(parentUid.isEmpty())
@@ -102,7 +102,7 @@ QVariant VersionList::data(const QModelIndex &index, int role) const
 
 BaseVersionList::RoleList VersionList::providesRoles() const
 {
-	return {VersionPointerRole, VersionRole, VersionIdRole, ParentGameVersionRole,
+	return {VersionPointerRole, VersionRole, VersionIdRole, ParentVersionRole,
 				TypeRole, UidRole, TimeRole, RequiresRole, SortRole,
 				RecommendedRole, LatestRole, VersionPtrRole};
 }
diff --git a/api/logic/minecraft/MinecraftProfile.cpp b/api/logic/minecraft/MinecraftProfile.cpp
index b74141d6..8638f5fa 100644
--- a/api/logic/minecraft/MinecraftProfile.cpp
+++ b/api/logic/minecraft/MinecraftProfile.cpp
@@ -80,7 +80,7 @@ void MinecraftProfile::clear()
 	m_traits.clear();
 	m_jarMods.clear();
 	mojangDownloads.clear();
-	m_problemSeverity = ProblemSeverity::PROBLEM_NONE;
+	m_problemSeverity = ProblemSeverity::None;
 }
 
 void MinecraftProfile::clearPatches()
@@ -273,9 +273,9 @@ QVariant MinecraftProfile::data(const QModelIndex &index, int role) const
 			auto severity = patch->getProblemSeverity();
 			switch (severity)
 			{
-				case PROBLEM_WARNING:
+				case ProblemSeverity::Warning:
 					return "warning";
-				case PROBLEM_ERROR:
+				case ProblemSeverity::Error:
 					return "error";
 				default:
 					return QVariant();
diff --git a/api/logic/minecraft/MinecraftProfile.h b/api/logic/minecraft/MinecraftProfile.h
index a6845e9c..a3b8fb61 100644
--- a/api/logic/minecraft/MinecraftProfile.h
+++ b/api/logic/minecraft/MinecraftProfile.h
@@ -22,7 +22,7 @@
 #include <memory>
 
 #include "Library.h"
-#include "VersionFile.h"
+#include "ProfilePatch.h"
 #include "JarMod.h"
 #include "BaseVersion.h"
 #include "MojangDownloadInfo.h"
@@ -175,7 +175,7 @@ private: /* data */
 	/// A list of jar mods. version files can add those.
 	QList<JarmodPtr> m_jarMods;
 
-	ProblemSeverity m_problemSeverity = PROBLEM_NONE;
+	ProblemSeverity m_problemSeverity = ProblemSeverity::None;
 
 	/*
 	FIXME: add support for those rules here? Looks like a pile of quick hacks to me though.
diff --git a/api/logic/minecraft/MojangVersionFormat.cpp b/api/logic/minecraft/MojangVersionFormat.cpp
index 651e2fbc..ea8dcd4d 100644
--- a/api/logic/minecraft/MojangVersionFormat.cpp
+++ b/api/logic/minecraft/MojangVersionFormat.cpp
@@ -151,7 +151,7 @@ void MojangVersionFormat::readVersionProperties(const QJsonObject &in, VersionFi
 		}
 		else if (!toCompare.isEmpty())
 		{
-			out->addProblem(PROBLEM_ERROR, QObject::tr("processArguments is set to unknown value '%1'").arg(processArguments));
+			out->addProblem(ProblemSeverity::Error, QObject::tr("processArguments is set to unknown value '%1'").arg(processArguments));
 		}
 	}
 	Bits::readString(in, "type", out->type);
@@ -166,8 +166,8 @@ void MojangVersionFormat::readVersionProperties(const QJsonObject &in, VersionFi
 		out->mojangAssetIndex = std::make_shared<MojangAssetIndexInfo>(out->assets);
 	}
 
-	out->m_releaseTime = timeFromS3Time(in.value("releaseTime").toString(""));
-	out->m_updateTime = timeFromS3Time(in.value("time").toString(""));
+	out->releaseTime = timeFromS3Time(in.value("releaseTime").toString(""));
+	out->updateTime = timeFromS3Time(in.value("time").toString(""));
 
 	if (in.contains("minimumLauncherVersion"))
 	{
@@ -175,7 +175,7 @@ void MojangVersionFormat::readVersionProperties(const QJsonObject &in, VersionFi
 		if (out->minimumLauncherVersion > CURRENT_MINIMUM_LAUNCHER_VERSION)
 		{
 			out->addProblem(
-				PROBLEM_WARNING,
+				ProblemSeverity::Warning,
 				QObject::tr("The 'minimumLauncherVersion' value of this version (%1) is higher than supported by MultiMC (%2). It might not work properly!")
 					.arg(out->minimumLauncherVersion)
 					.arg(CURRENT_MINIMUM_LAUNCHER_VERSION));
@@ -212,7 +212,7 @@ VersionFilePtr MojangVersionFormat::versionFileFromJson(const QJsonDocument &doc
 	out->name = "Minecraft";
 	out->uid = "net.minecraft";
 	out->version = out->minecraftVersion;
-	out->filename = filename;
+	// out->filename = filename;
 
 
 	if (root.contains("libraries"))
@@ -234,13 +234,13 @@ void MojangVersionFormat::writeVersionProperties(const VersionFile* in, QJsonObj
 	writeString(out, "mainClass", in->mainClass);
 	writeString(out, "minecraftArguments", in->minecraftArguments);
 	writeString(out, "type", in->type);
-	if(!in->m_releaseTime.isNull())
+	if(!in->releaseTime.isNull())
 	{
-		writeString(out, "releaseTime", timeToS3Time(in->m_releaseTime));
+		writeString(out, "releaseTime", timeToS3Time(in->releaseTime));
 	}
-	if(!in->m_updateTime.isNull())
+	if(!in->updateTime.isNull())
 	{
-		writeString(out, "time", timeToS3Time(in->m_updateTime));
+		writeString(out, "time", timeToS3Time(in->updateTime));
 	}
 	if(in->minimumLauncherVersion != -1)
 	{
diff --git a/api/logic/minecraft/ProfilePatch.cpp b/api/logic/minecraft/ProfilePatch.cpp
new file mode 100644
index 00000000..0ff5895d
--- /dev/null
+++ b/api/logic/minecraft/ProfilePatch.cpp
@@ -0,0 +1,214 @@
+#include "ProfilePatch.h"
+
+#include "meta/Version.h"
+#include "VersionFile.h"
+
+ProfilePatch::ProfilePatch(std::shared_ptr<Meta::Version> version)
+	:m_metaVersion(version)
+{
+}
+
+ProfilePatch::ProfilePatch(std::shared_ptr<VersionFile> file, const QString& filename)
+	:m_file(file), m_filename(filename)
+{
+}
+
+void ProfilePatch::applyTo(MinecraftProfile* profile)
+{
+	auto vfile = getVersionFile();
+	if(vfile)
+	{
+		vfile->applyTo(profile);
+	}
+}
+
+std::shared_ptr<class VersionFile> ProfilePatch::getVersionFile()
+{
+	if(m_metaVersion)
+	{
+		if(!m_metaVersion->isLoaded())
+		{
+			m_metaVersion->load();
+		}
+		return m_metaVersion->data();
+	}
+	return m_file;
+}
+
+int ProfilePatch::getOrder()
+{
+	if(m_orderOverride)
+		return m_order;
+
+	auto vfile = getVersionFile();
+	if(vfile)
+	{
+		return vfile->order;
+	}
+	return 0;
+}
+void ProfilePatch::setOrder(int order)
+{
+	m_orderOverride = true;
+	m_order = order;
+}
+QString ProfilePatch::getID()
+{
+	if(m_metaVersion)
+		return m_metaVersion->uid();
+	return getVersionFile()->uid;
+}
+QString ProfilePatch::getName()
+{
+	if(m_metaVersion)
+		return m_metaVersion->name();
+	return getVersionFile()->name;
+}
+QString ProfilePatch::getVersion()
+{
+	if(m_metaVersion)
+		return m_metaVersion->version();
+	return getVersionFile()->version;
+}
+QString ProfilePatch::getFilename()
+{
+	return m_filename;
+}
+QDateTime ProfilePatch::getReleaseDateTime()
+{
+	if(m_metaVersion)
+	{
+		return m_metaVersion->time();
+	}
+	return getVersionFile()->releaseTime;
+}
+
+bool ProfilePatch::isCustom()
+{
+	return !m_isVanilla;
+};
+
+bool ProfilePatch::isCustomizable()
+{
+	if(m_metaVersion)
+	{
+		if(getVersionFile())
+		{
+			return true;
+		}
+	}
+	return false;
+}
+bool ProfilePatch::isRemovable()
+{
+	return m_isRemovable;
+}
+bool ProfilePatch::isRevertible()
+{
+	return m_isRevertible;
+}
+bool ProfilePatch::isMoveable()
+{
+	return m_isMovable;
+}
+bool ProfilePatch::isVersionChangeable()
+{
+	return false;
+}
+
+void ProfilePatch::setVanilla (bool state)
+{
+	m_isVanilla = state;
+}
+void ProfilePatch::setRemovable (bool state)
+{
+	m_isRemovable = state;
+}
+void ProfilePatch::setRevertible (bool state)
+{
+	m_isRevertible = state;
+}
+void ProfilePatch::setMovable (bool state)
+{
+	m_isMovable = state;
+}
+
+/*
+class MetaPatchProvider : public ProfilePatch
+{
+public:
+	MetaPatchProvider(std::shared_ptr<Meta::Version> data)
+		:m_version(data)
+	{
+	}
+public:
+	QString getFilename() override
+	{
+		return QString();
+	}
+	QString getID() override
+	{
+		return m_version->uid();
+	}
+	QString getName() override
+	{
+		auto vfile = getFile();
+		if(vfile)
+		{
+			return vfile->name;
+		}
+		return m_version->name();
+	}
+	QDateTime getReleaseDateTime() override
+	{
+		return m_version->time();
+	}
+	QString getVersion() override
+	{
+		return m_version->version();
+	}
+	std::shared_ptr<class VersionFile> getVersionFile() override
+	{
+		return m_version->data();
+	}
+	void setOrder(int) override
+	{
+	}
+	int getOrder() override
+	{
+		return 0;
+	}
+	bool isVersionChangeable() override
+	{
+		return true;
+	}
+	bool isRevertible() override
+	{
+		return false;
+	}
+	bool isRemovable() override
+	{
+		return true;
+	}
+	bool isCustom() override
+	{
+		return false;
+	}
+	bool isCustomizable() override
+	{
+		return true;
+	}
+	bool isMoveable() override
+	{
+		return true;
+	}
+
+private:
+	VersionFilePtr getFile()
+	{
+
+	}
+private:
+	std::shared_ptr<Meta::Version> m_version;
+};
+*/
\ No newline at end of file
diff --git a/api/logic/minecraft/ProfilePatch.h b/api/logic/minecraft/ProfilePatch.h
index 699a38ae..9e2555af 100644
--- a/api/logic/minecraft/ProfilePatch.h
+++ b/api/logic/minecraft/ProfilePatch.h
@@ -5,85 +5,63 @@
 #include <QJsonDocument>
 #include <QDateTime>
 #include "JarMod.h"
+#include "ProblemProvider.h"
 
 class MinecraftProfile;
-
-enum ProblemSeverity
+namespace Meta
 {
-	PROBLEM_NONE,
-	PROBLEM_WARNING,
-	PROBLEM_ERROR
-};
+	class Version;
+}
+class VersionFile;
 
-class PatchProblem
+class ProfilePatch : public ProblemProvider
 {
 public:
-	PatchProblem(ProblemSeverity severity, const QString & description)
-	{
-		m_severity = severity;
-		m_description = description;
-	}
-	const QString & getDescription() const
-	{
-		return m_description;
-	}
-	const ProblemSeverity getSeverity() const
-	{
-		return m_severity;
-	}
-private:
-	ProblemSeverity m_severity;
-	QString m_description;
-};
+	ProfilePatch(std::shared_ptr<Meta::Version> version);
+	ProfilePatch(std::shared_ptr<VersionFile> file, const QString &filename = QString());
 
-class ProfilePatch : public std::enable_shared_from_this<ProfilePatch>
-{
-public:
 	virtual ~ProfilePatch(){};
-	virtual void applyTo(MinecraftProfile *profile) = 0;
-
-	virtual bool isMinecraftVersion() = 0;
+	virtual void applyTo(MinecraftProfile *profile);
 
-	virtual bool isMoveable() = 0;
-	virtual bool isCustomizable() = 0;
-	virtual bool isRevertible() = 0;
-	virtual bool isRemovable() = 0;
-	virtual bool isCustom() = 0;
-	virtual bool isEditable() = 0;
-	virtual bool isVersionChangeable() = 0;
+	virtual bool isMoveable();
+	virtual bool isCustomizable();
+	virtual bool isRevertible();
+	virtual bool isRemovable();
+	virtual bool isCustom();
+	virtual bool isVersionChangeable();
 
-	virtual void setOrder(int order) = 0;
-	virtual int getOrder() = 0;
+	virtual void setOrder(int order);
+	virtual int getOrder();
 
-	virtual QString getID() = 0;
-	virtual QString getName() = 0;
-	virtual QString getVersion() = 0;
-	virtual QDateTime getReleaseDateTime() = 0;
+	virtual QString getID();
+	virtual QString getName();
+	virtual QString getVersion();
+	virtual QDateTime getReleaseDateTime();
 
-	virtual QString getFilename() = 0;
+	virtual QString getFilename();
 
-	virtual std::shared_ptr<class VersionFile> getVersionFile() = 0;
+	virtual std::shared_ptr<class VersionFile> getVersionFile();
 
-	virtual const QList<PatchProblem>& getProblems()
-	{
-		return m_problems;
-	}
-	virtual void addProblem(ProblemSeverity severity, const QString &description)
-	{
-		if(severity > m_problemSeverity)
-		{
-			m_problemSeverity = severity;
-		}
-		m_problems.append(PatchProblem(severity, description));
-	}
-	virtual ProblemSeverity getProblemSeverity()
-	{
-		return m_problemSeverity;
-	}
+	void setVanilla (bool state);
+	void setRemovable (bool state);
+	void setRevertible (bool state);
+	void setCustomizable (bool state);
+	void setMovable (bool state);
 
 protected:
-	QList<PatchProblem> m_problems;
-	ProblemSeverity m_problemSeverity = PROBLEM_NONE;
+	// Properties for UI and version manipulation from UI in general
+	bool m_isMovable = false;
+	bool m_isCustomizable = false;
+	bool m_isRevertible = false;
+	bool m_isRemovable = false;
+	bool m_isVanilla = false;
+
+	bool m_orderOverride = false;
+	int m_order = 0;
+
+	std::shared_ptr<Meta::Version> m_metaVersion;
+	std::shared_ptr<VersionFile> m_file;
+	QString m_filename;
 };
 
 typedef std::shared_ptr<ProfilePatch> ProfilePatchPtr;
diff --git a/api/logic/minecraft/ProfileStrategy.h b/api/logic/minecraft/ProfileStrategy.h
index b4dfc4b3..26bdf661 100644
--- a/api/logic/minecraft/ProfileStrategy.h
+++ b/api/logic/minecraft/ProfileStrategy.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "ProfileUtils.h"
+#include "ProfilePatch.h"
 
 class MinecraftProfile;
 
diff --git a/api/logic/minecraft/ProfileUtils.cpp b/api/logic/minecraft/ProfileUtils.cpp
index c7c56dd6..8c5bc052 100644
--- a/api/logic/minecraft/ProfileUtils.cpp
+++ b/api/logic/minecraft/ProfileUtils.cpp
@@ -103,8 +103,8 @@ static VersionFilePtr createErrorVersionFile(QString fileId, QString filepath, Q
 {
 	auto outError = std::make_shared<VersionFile>();
 	outError->uid = outError->name = fileId;
-	outError->filename = filepath;
-	outError->addProblem(PROBLEM_ERROR, error);
+	// outError->filename = filepath;
+	outError->addProblem(ProblemSeverity::Error, error);
 	return outError;
 }
 
diff --git a/api/logic/minecraft/VersionBuildError.h b/api/logic/minecraft/VersionBuildError.h
index fda453e5..f362c405 100644
--- a/api/logic/minecraft/VersionBuildError.h
+++ b/api/logic/minecraft/VersionBuildError.h
@@ -27,23 +27,6 @@ public:
 };
 
 /**
- * some patch was intended for a different version of minecraft
- */
-class MinecraftVersionMismatch : public VersionBuildError
-{
-public:
-	MinecraftVersionMismatch(QString fileId, QString mcVersion, QString parentMcVersion)
-		: VersionBuildError(QObject::tr("The patch %1 is for a different version of Minecraft "
-										"(%2) than that of the instance (%3).")
-								.arg(fileId)
-								.arg(mcVersion)
-								.arg(parentMcVersion)) {};
-	virtual ~MinecraftVersionMismatch() noexcept
-	{
-	}
-};
-
-/**
  * files required for the version are not (yet?) present
  */
 class VersionIncomplete : public VersionBuildError
diff --git a/api/logic/minecraft/VersionFile.cpp b/api/logic/minecraft/VersionFile.cpp
index 17dc6a49..b261ff2a 100644
--- a/api/logic/minecraft/VersionFile.cpp
+++ b/api/logic/minecraft/VersionFile.cpp
@@ -12,32 +12,28 @@
 #include "VersionBuildError.h"
 #include <Version.h>
 
-bool VersionFile::isMinecraftVersion()
+static bool isMinecraftVersion(const QString &uid)
 {
 	return uid == "net.minecraft";
 }
 
 void VersionFile::applyTo(MinecraftProfile *profile)
 {
-	auto theirVersion = profile->getMinecraftVersion();
-	if (!theirVersion.isNull() && !dependsOnMinecraftVersion.isNull())
+	// Only real Minecraft can set those. Don't let anything override them.
+	if (isMinecraftVersion(uid))
 	{
-		if (QRegExp(dependsOnMinecraftVersion, Qt::CaseInsensitive, QRegExp::Wildcard).indexIn(theirVersion) == -1)
-		{
-			throw MinecraftVersionMismatch(uid, dependsOnMinecraftVersion, theirVersion);
-		}
+		profile->applyMinecraftVersion(minecraftVersion);
+		profile->applyMinecraftVersionType(type);
+		// HACK: ignore assets from other version files than Minecraft
+		// workaround for stupid assets issue caused by amazon:
+		// https://www.theregister.co.uk/2017/02/28/aws_is_awol_as_s3_goes_haywire/
+		profile->applyMinecraftAssets(mojangAssetIndex);
 	}
-	profile->applyMinecraftVersion(minecraftVersion);
+
 	profile->applyMainClass(mainClass);
 	profile->applyAppletClass(appletClass);
 	profile->applyMinecraftArguments(minecraftArguments);
-	if (isMinecraftVersion())
-	{
-		profile->applyMinecraftVersionType(type);
-	}
-	profile->applyMinecraftAssets(mojangAssetIndex);
 	profile->applyTweakers(addTweakers);
-
 	profile->applyJarMods(jarMods);
 	profile->applyTraits(traits);
 
@@ -53,3 +49,14 @@ void VersionFile::applyTo(MinecraftProfile *profile)
 		iter++;
 	}
 }
+
+/*
+	auto theirVersion = profile->getMinecraftVersion();
+	if (!theirVersion.isNull() && !dependsOnMinecraftVersion.isNull())
+	{
+		if (QRegExp(dependsOnMinecraftVersion, Qt::CaseInsensitive, QRegExp::Wildcard).indexIn(theirVersion) == -1)
+		{
+			throw MinecraftVersionMismatch(uid, dependsOnMinecraftVersion, theirVersion);
+		}
+	}
+*/
\ No newline at end of file
diff --git a/api/logic/minecraft/VersionFile.h b/api/logic/minecraft/VersionFile.h
index dad9a057..a71c6228 100644
--- a/api/logic/minecraft/VersionFile.h
+++ b/api/logic/minecraft/VersionFile.h
@@ -8,7 +8,7 @@
 #include <memory>
 #include "minecraft/OpSys.h"
 #include "minecraft/Rule.h"
-#include "ProfilePatch.h"
+#include "ProblemProvider.h"
 #include "Library.h"
 #include "JarMod.h"
 
@@ -18,111 +18,19 @@ struct MojangDownloadInfo;
 struct MojangAssetIndexInfo;
 
 typedef std::shared_ptr<VersionFile> VersionFilePtr;
-class VersionFile : public ProfilePatch
+class VersionFile : public ProblemProvider
 {
 	friend class MojangVersionFormat;
 	friend class OneSixVersionFormat;
 public: /* methods */
-	virtual void applyTo(MinecraftProfile *profile) override;
-	virtual bool isMinecraftVersion() override;
-	virtual int getOrder() override
-	{
-		return order;
-	}
-	virtual void setOrder(int order) override
-	{
-		this->order = order;
-	}
-	virtual QString getID() override
-	{
-		return uid;
-	}
-	virtual QString getName() override
-	{
-		return name;
-	}
-	virtual QString getVersion() override
-	{
-		return version;
-	}
-	virtual QString getFilename() override
-	{
-		return filename;
-	}
-	virtual QDateTime getReleaseDateTime() override
-	{
-		return m_releaseTime;
-	}
-
-	std::shared_ptr<class VersionFile> getVersionFile() override
-	{
-		return std::dynamic_pointer_cast<VersionFile>(shared_from_this());
-	}
-
-	virtual bool isCustom() override
-	{
-		return !m_isVanilla;
-	};
-	virtual bool isCustomizable() override
-	{
-		return m_isCustomizable;
-	}
-	virtual bool isRemovable() override
-	{
-		return m_isRemovable;
-	}
-	virtual bool isRevertible() override
-	{
-		return m_isRevertible;
-	}
-    virtual bool isMoveable() override
-	{
-		return m_isMovable;
-	}
-    virtual bool isEditable() override
-	{
-		return isCustom();
-	}
-	virtual bool isVersionChangeable() override
-	{
-		return false;
-	}
-
-	void setVanilla (bool state)
-	{
-		m_isVanilla = state;
-	}
-	void setRemovable (bool state)
-	{
-		m_isRemovable = state;
-	}
-	void setRevertible (bool state)
-	{
-		m_isRevertible = state;
-	}
-	void setCustomizable (bool state)
-	{
-		m_isCustomizable = state;
-	}
-	void setMovable (bool state)
-	{
-		m_isMovable = state;
-	}
-
+	void applyTo(MinecraftProfile *profile);
 
 public: /* data */
-	// Flags for UI and version file manipulation in general
-	bool m_isVanilla = false;
-	bool m_isRemovable = false;
-	bool m_isRevertible = false;
-	bool m_isCustomizable = false;
-	bool m_isMovable = false;
-
 	/// MultiMC: order hint for this version file if no explicit order is set
 	int order = 0;
 
 	/// MultiMC: filename of the file this was loaded from
-	QString filename;
+	// QString filename;
 
 	/// MultiMC: human readable name of this package
 	QString name;
@@ -139,13 +47,13 @@ public: /* data */
 	/// Mojang: used to version the Mojang version format
 	int minimumLauncherVersion = -1;
 
-	/// Mojang: version of Minecraft this is
+	/// Mojang: DEPRECATED version of Minecraft this is
 	QString minecraftVersion;
 
 	/// Mojang: class to launch Minecraft with
 	QString mainClass;
 
-	/// MultiMC: DEPRECATED class to launch legacy Minecraft with (ambed in a custom window)
+	/// MultiMC: class to launch legacy Minecraft with (embed in a custom window)
 	QString appletClass;
 
 	/// Mojang: Minecraft launch arguments (may contain placeholders for variable substitution)
@@ -155,10 +63,10 @@ public: /* data */
 	QString type;
 
 	/// Mojang: the time this version was actually released by Mojang
-	QDateTime m_releaseTime;
+	QDateTime releaseTime;
 
 	/// Mojang: the time this version was last updated by Mojang
-	QDateTime m_updateTime;
+	QDateTime updateTime;
 
 	/// Mojang: DEPRECATED asset group to be used with Minecraft
 	QString assets;
diff --git a/api/logic/minecraft/ftb/FTBProfileStrategy.cpp b/api/logic/minecraft/ftb/FTBProfileStrategy.cpp
index 45765cd4..c3d9cc6a 100644
--- a/api/logic/minecraft/ftb/FTBProfileStrategy.cpp
+++ b/api/logic/minecraft/ftb/FTBProfileStrategy.cpp
@@ -29,7 +29,6 @@ void FTBProfileStrategy::loadDefaultBuiltinPatches()
 			auto file = ProfileUtils::parseJsonFile(QFileInfo(mcJson), false);
 			file->uid = "net.minecraft";
 			file->name = QObject::tr("Minecraft (tracked)");
-			file->setVanilla(true);
 			if(file->version.isEmpty())
 			{
 				file->version = mcVersion;
@@ -39,7 +38,8 @@ void FTBProfileStrategy::loadDefaultBuiltinPatches()
 				addLib->setHint("local");
 				addLib->setStoragePrefix(nativeInstance->librariesPath().absolutePath());
 			}
-			minecraftPatch = std::dynamic_pointer_cast<ProfilePatch>(file);
+			minecraftPatch = std::make_shared<ProfilePatch>(file);
+			minecraftPatch->setVanilla(true);
 		}
 		else
 		{
@@ -65,7 +65,6 @@ void FTBProfileStrategy::loadDefaultBuiltinPatches()
 				addLib->setStoragePrefix(nativeInstance->librariesPath().absolutePath());
 			}
 			file->uid = "org.multimc.ftb.pack";
-			file->setVanilla(true);
 			file->name = QObject::tr("%1 (FTB pack)").arg(m_instance->name());
 			if(file->version.isEmpty())
 			{
@@ -81,7 +80,8 @@ void FTBProfileStrategy::loadDefaultBuiltinPatches()
 					}
 				}
 			}
-			packPatch = std::dynamic_pointer_cast<ProfilePatch>(file);
+			packPatch = std::make_shared<ProfilePatch>(file);
+			packPatch->setVanilla(true);
 		}
 		else
 		{
diff --git a/api/logic/minecraft/onesix/OneSixInstance.cpp b/api/logic/minecraft/onesix/OneSixInstance.cpp
index b471ff3e..6e4a5bdc 100644
--- a/api/logic/minecraft/onesix/OneSixInstance.cpp
+++ b/api/logic/minecraft/onesix/OneSixInstance.cpp
@@ -523,7 +523,7 @@ QString OneSixInstance::currentVersionId() const
 void OneSixInstance::reloadProfile()
 {
 	m_profile->reload();
-	setVersionBroken(m_profile->getProblemSeverity() == ProblemSeverity::PROBLEM_ERROR);
+	setVersionBroken(m_profile->getProblemSeverity() == ProblemSeverity::Error);
 	emit versionReloaded();
 }
 
diff --git a/api/logic/minecraft/onesix/OneSixProfileStrategy.cpp b/api/logic/minecraft/onesix/OneSixProfileStrategy.cpp
index 3f33dd7f..a9cad832 100644
--- a/api/logic/minecraft/onesix/OneSixProfileStrategy.cpp
+++ b/api/logic/minecraft/onesix/OneSixProfileStrategy.cpp
@@ -15,6 +15,8 @@
 #include <meta/Index.h>
 #include <meta/Version.h>
 
+#include <tuple>
+
 OneSixProfileStrategy::OneSixProfileStrategy(OneSixInstance* instance)
 {
 	m_instance = instance;
@@ -81,103 +83,6 @@ void OneSixProfileStrategy::upgradeDeprecatedFiles()
 	}
 }
 
-class MetaPatchProvider : public ProfilePatch
-{
-public: /* con/des */
-	MetaPatchProvider(std::shared_ptr<Meta::Version> data)
-		:m_version(data)
-	{
-	}
-public:
-	QString getFilename() override
-	{
-		return QString();
-	}
-	QString getID() override
-	{
-		return m_version->uid();
-	}
-	QString getName() override
-	{
-		auto vfile = getFile();
-		if(vfile)
-		{
-			return vfile->getName();
-		}
-		return m_version->name();
-	}
-	QDateTime getReleaseDateTime() override
-	{
-		return m_version->time();
-	}
-	QString getVersion() override
-	{
-		return m_version->version();
-	}
-	std::shared_ptr<class VersionFile> getVersionFile() override
-	{
-		return m_version->data();
-	}
-	void setOrder(int) override
-	{
-	}
-	int getOrder() override
-	{
-		return 0;
-	}
-	bool isVersionChangeable() override
-	{
-		return true;
-	}
-	bool isRevertible() override
-	{
-		return false;
-	}
-	bool isRemovable() override
-	{
-		return true;
-	}
-	bool isCustom() override
-	{
-		return false;
-	}
-	bool isCustomizable() override
-	{
-		return true;
-	}
-	bool isMoveable() override
-	{
-		return true;
-	}
-	bool isEditable() override
-	{
-		return false;
-	}
-	bool isMinecraftVersion() override
-	{
-		return getID() == "net.minecraft";
-	}
-	void applyTo(MinecraftProfile * profile) override
-	{
-		auto vfile = getFile();
-		if(vfile)
-		{
-			vfile->applyTo(profile);
-		}
-	}
-private:
-	VersionFilePtr getFile()
-	{
-		if(!m_version->isLoaded())
-		{
-			m_version->load();
-		}
-		return m_version->data();
-	}
-private:
-	std::shared_ptr<Meta::Version> m_version;
-};
-
 void OneSixProfileStrategy::loadDefaultBuiltinPatches()
 {
 	{
@@ -191,14 +96,15 @@ void OneSixProfileStrategy::loadDefaultBuiltinPatches()
 			{
 				file->version = m_instance->intendedVersionId();
 			}
-			file->setVanilla(false);
-			file->setRevertible(true);
-			minecraftPatch = std::dynamic_pointer_cast<ProfilePatch>(file);
+			minecraftPatch = std::make_shared<ProfilePatch>(file, mcJson);
+			minecraftPatch->setVanilla(false);
+			minecraftPatch->setRevertible(true);
 		}
 		else
 		{
 			auto mcversion = ENV.metadataIndex()->get("net.minecraft", m_instance->intendedVersionId());
-			minecraftPatch = std::make_shared<MetaPatchProvider>(mcversion);
+			minecraftPatch = std::make_shared<ProfilePatch>(mcversion);
+			minecraftPatch->setVanilla(true);
 		}
 		if (!minecraftPatch)
 		{
@@ -214,14 +120,15 @@ void OneSixProfileStrategy::loadDefaultBuiltinPatches()
 		if(QFile::exists(lwjglJson))
 		{
 			auto file = ProfileUtils::parseJsonFile(QFileInfo(lwjglJson), false);
-			file->setVanilla(false);
-			file->setRevertible(true);
-			lwjglPatch = std::dynamic_pointer_cast<ProfilePatch>(file);
+			lwjglPatch = std::make_shared<ProfilePatch>(file, lwjglJson);
+			lwjglPatch->setVanilla(false);
+			lwjglPatch->setRevertible(true);
 		}
 		else
 		{
 			auto lwjglversion = ENV.metadataIndex()->get("org.lwjgl", "2.9.1");
-			lwjglPatch = std::make_shared<MetaPatchProvider>(lwjglversion);
+			lwjglPatch = std::make_shared<ProfilePatch>(lwjglversion);
+			lwjglPatch->setVanilla(true);
 		}
 		if (!lwjglPatch)
 		{
@@ -261,21 +168,17 @@ void OneSixProfileStrategy::loadUserPatches()
 		// sanity check. prevent tampering with files.
 		if (file->uid != id)
 		{
-			file->addProblem(PROBLEM_WARNING, QObject::tr("load id %1 does not match internal id %2").arg(id, file->uid));
+			file->addProblem(ProblemSeverity::Warning, QObject::tr("load id %1 does not match internal id %2").arg(id, file->uid));
 			seen_extra.insert(file->uid);
 		}
-		file->setRemovable(true);
-		file->setMovable(true);
-		// HACK: ignore assets from other version files than Minecraft
-		// workaround for stupid assets issue caused by amazon:
-		// https://www.theregister.co.uk/2017/02/28/aws_is_awol_as_s3_goes_haywire/
-		file->assets = QString();
-		file->mojangAssetIndex.reset();
-		// HACK
-		profile->appendPatch(file);
+		auto patchEntry = std::make_shared<ProfilePatch>(file, filename);
+		patchEntry->setRemovable(true);
+		patchEntry->setMovable(true);
+		profile->appendPatch(patchEntry);
 	}
 	// now load the rest by internal preference.
-	QMultiMap<int, VersionFilePtr> files;
+	using FileEntry = std::tuple<VersionFilePtr, QString>;
+	QMultiMap<int, FileEntry> files;
 	for (auto info : patches.entryInfoList(QStringList() << "*.json", QDir::Files))
 	{
 		// parse the file
@@ -292,16 +195,18 @@ void OneSixProfileStrategy::loadUserPatches()
 		// do not load what we already loaded in the first pass
 		if (userOrder.contains(file->uid))
 			continue;
-		file->setRemovable(true);
-		file->setMovable(true);
-		// HACK: ignore assets from other version files than Minecraft
-		// workaround for stupid assets issue caused by amazon:
-		// https://www.theregister.co.uk/2017/02/28/aws_is_awol_as_s3_goes_haywire/
-		file->assets = QString();
-		file->mojangAssetIndex.reset();
-		// HACK
-		files.insert(file->getOrder(), file);
+		files.insert(file->order, std::make_tuple(file, info.filePath()));
 	}
+	auto appendFilePatch = [&](FileEntry tuple)
+	{
+		VersionFilePtr file;
+		QString filename;
+		std::tie(file, filename) = tuple;
+		auto patchEntry = std::make_shared<ProfilePatch>(file, filename);
+		patchEntry->setRemovable(true);
+		patchEntry->setMovable(true);
+		profile->appendPatch(patchEntry);
+	};
 	QSet<int> seen;
 	for (auto order : files.keys())
 	{
@@ -311,7 +216,7 @@ void OneSixProfileStrategy::loadUserPatches()
 		const auto &values = files.values(order);
 		if(values.size() == 1)
 		{
-			profile->appendPatch(values[0]);
+			appendFilePatch(values[0]);
 			continue;
 		}
 		for(auto &file: values)
@@ -320,10 +225,13 @@ void OneSixProfileStrategy::loadUserPatches()
 			for(auto &file2: values)
 			{
 				if(file != file2)
-					list.append(file2->name);
+				{
+					list.append(std::get<0>(file2)->name);
+				}
 			}
-			file->addProblem(PROBLEM_WARNING, QObject::tr("%1 has the same order as the following components:\n%2").arg(file->name, list.join(", ")));
-			profile->appendPatch(file);
+			auto vfileptr = std::get<0>(file);
+			vfileptr->addProblem(ProblemSeverity::Warning, QObject::tr("%1 has the same order as the following components:\n%2").arg(vfileptr->name, list.join(", ")));
+			appendFilePatch(file);
 		}
 	}
 }
@@ -503,11 +411,9 @@ bool OneSixProfileStrategy::installJarMods(QStringList filepaths)
 		f->jarMods.append(jarMod);
 		f->name = target_name;
 		f->uid = target_id;
-		f->setOrder(profile->getFreeOrderNumber());
+		f->order = profile->getFreeOrderNumber();
 		QString patchFileName = FS::PathCombine(patchDir, target_id + ".json");
-		f->filename = patchFileName;
-		f->setMovable(true);
-		f->setRemovable(true);
+		// f->filename = patchFileName;
 
 		QFile file(patchFileName);
 		if (!file.open(QFile::WriteOnly))
@@ -518,7 +424,11 @@ bool OneSixProfileStrategy::installJarMods(QStringList filepaths)
 		}
 		file.write(OneSixVersionFormat::versionFileToJson(f, true).toJson());
 		file.close();
-		profile->appendPatch(f);
+
+		auto patch = std::make_shared<ProfilePatch>(f);
+		patch->setMovable(true);
+		patch->setRemovable(true);
+		profile->appendPatch(patch);
 	}
 	profile->saveCurrentOrder();
 	profile->reapplyPatches();
diff --git a/api/logic/minecraft/onesix/OneSixVersionFormat.cpp b/api/logic/minecraft/onesix/OneSixVersionFormat.cpp
index 944e68a4..266bd4bd 100644
--- a/api/logic/minecraft/onesix/OneSixVersionFormat.cpp
+++ b/api/logic/minecraft/onesix/OneSixVersionFormat.cpp
@@ -51,7 +51,7 @@ VersionFilePtr OneSixVersionFormat::versionFileFromJson(const QJsonDocument &doc
 	{
 		if (root.contains("order"))
 		{
-			out->setOrder(requireInteger(root.value("order")));
+			out->order = requireInteger(root.value("order"));
 		}
 		else
 		{
@@ -73,7 +73,7 @@ VersionFilePtr OneSixVersionFormat::versionFileFromJson(const QJsonDocument &doc
 
 	out->version = root.value("version").toString();
 	out->dependsOnMinecraftVersion = root.value("mcVersion").toString();
-	out->filename = filename;
+	// out->filename = filename;
 
 	MojangVersionFormat::readVersionProperties(root, out.get());
 
@@ -128,7 +128,8 @@ VersionFilePtr OneSixVersionFormat::versionFileFromJson(const QJsonDocument &doc
 	bool hasLibs = root.contains("libraries");
 	if (hasPlusLibs && hasLibs)
 	{
-		out->addProblem(PROBLEM_WARNING, QObject::tr("Version file has both '+libraries' and 'libraries'. This is no longer supported."));
+		out->addProblem(ProblemSeverity::Warning,
+						QObject::tr("Version file has both '+libraries' and 'libraries'. This is no longer supported."));
 		readLibs("libraries");
 		readLibs("+libraries");
 	}
@@ -144,23 +145,23 @@ VersionFilePtr OneSixVersionFormat::versionFileFromJson(const QJsonDocument &doc
 	/* removed features that shouldn't be used */
 	if (root.contains("tweakers"))
 	{
-		out->addProblem(PROBLEM_ERROR, QObject::tr("Version file contains unsupported element 'tweakers'"));
+		out->addProblem(ProblemSeverity::Error, QObject::tr("Version file contains unsupported element 'tweakers'"));
 	}
 	if (root.contains("-libraries"))
 	{
-		out->addProblem(PROBLEM_ERROR, QObject::tr("Version file contains unsupported element '-libraries'"));
+		out->addProblem(ProblemSeverity::Error, QObject::tr("Version file contains unsupported element '-libraries'"));
 	}
 	if (root.contains("-tweakers"))
 	{
-		out->addProblem(PROBLEM_ERROR, QObject::tr("Version file contains unsupported element '-tweakers'"));
+		out->addProblem(ProblemSeverity::Error, QObject::tr("Version file contains unsupported element '-tweakers'"));
 	}
 	if (root.contains("-minecraftArguments"))
 	{
-		out->addProblem(PROBLEM_ERROR, QObject::tr("Version file contains unsupported element '-minecraftArguments'"));
+		out->addProblem(ProblemSeverity::Error, QObject::tr("Version file contains unsupported element '-minecraftArguments'"));
 	}
 	if (root.contains("+minecraftArguments"))
 	{
-		out->addProblem(PROBLEM_ERROR, QObject::tr("Version file contains unsupported element '+minecraftArguments'"));
+		out->addProblem(ProblemSeverity::Error, QObject::tr("Version file contains unsupported element '+minecraftArguments'"));
 	}
 	return out;
 }
@@ -170,7 +171,7 @@ QJsonDocument OneSixVersionFormat::versionFileToJson(const VersionFilePtr &patch
 	QJsonObject root;
 	if (saveOrder)
 	{
-		root.insert("order", patch->getOrder());
+		root.insert("order", patch->order);
 	}
 	writeString(root, "name", patch->name);