NOISSUE rename MinecraftProfile to ComponentList

It is realistically a list of components. The fact that it also holds the final
launch parameters is a design bug.

1 files changed, 1125 insertions, 0 deletions

diff --git a/api/logic/minecraft/ComponentList.cpp b/api/logic/minecraft/ComponentList.cpp
new file mode 100644
index 00000000..8ce1fded
--- /dev/null
+++ b/api/logic/minecraft/ComponentList.cpp
@@ -0,0 +1,1125 @@
+/* Copyright 2013-2017 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <QFile>
+#include <QCryptographicHash>
+#include <Version.h>
+#include <QDir>
+#include <QJsonDocument>
+#include <QJsonArray>
+#include <QDebug>
+
+#include "minecraft/ComponentList.h"
+#include "Exception.h"
+#include <minecraft/OneSixVersionFormat.h>
+#include <FileSystem.h>
+#include <QSaveFile>
+#include <Env.h>
+#include <meta/Index.h>
+#include <minecraft/MinecraftInstance.h>
+#include <QUuid>
+
+ComponentList::ComponentList(MinecraftInstance * instance)
+	: QAbstractListModel()
+{
+	m_instance = instance;
+	clear();
+}
+
+ComponentList::~ComponentList()
+{
+}
+
+void ComponentList::reload()
+{
+	beginResetModel();
+	load_internal();
+	reapplyPatches();
+	endResetModel();
+}
+
+void ComponentList::clear()
+{
+	m_minecraftVersion.clear();
+	m_minecraftVersionType.clear();
+	m_minecraftAssets.reset();
+	m_minecraftArguments.clear();
+	m_tweakers.clear();
+	m_mainClass.clear();
+	m_appletClass.clear();
+	m_libraries.clear();
+	m_traits.clear();
+	m_jarMods.clear();
+	m_mainJar.reset();
+	m_problemSeverity = ProblemSeverity::None;
+}
+
+void ComponentList::clearPatches()
+{
+	beginResetModel();
+	m_patches.clear();
+	endResetModel();
+}
+
+void ComponentList::appendPatch(ProfilePatchPtr patch)
+{
+	int index = m_patches.size();
+	beginInsertRows(QModelIndex(), index, index);
+	m_patches.append(patch);
+	endInsertRows();
+}
+
+bool ComponentList::remove(const int index)
+{
+	auto patch = versionPatch(index);
+	if (!patch->isRemovable())
+	{
+		qDebug() << "Patch" << patch->getID() << "is non-removable";
+		return false;
+	}
+
+	if(!removePatch_internal(patch))
+	{
+		qCritical() << "Patch" << patch->getID() << "could not be removed";
+		return false;
+	}
+
+	beginRemoveRows(QModelIndex(), index, index);
+	m_patches.removeAt(index);
+	endRemoveRows();
+	reapplyPatches();
+	saveCurrentOrder();
+	return true;
+}
+
+bool ComponentList::remove(const QString id)
+{
+	int i = 0;
+	for (auto patch : m_patches)
+	{
+		if (patch->getID() == id)
+		{
+			return remove(i);
+		}
+		i++;
+	}
+	return false;
+}
+
+bool ComponentList::customize(int index)
+{
+	auto patch = versionPatch(index);
+	if (!patch->isCustomizable())
+	{
+		qDebug() << "Patch" << patch->getID() << "is not customizable";
+		return false;
+	}
+	if(!customizePatch_internal(patch))
+	{
+		qCritical() << "Patch" << patch->getID() << "could not be customized";
+		return false;
+	}
+	reapplyPatches();
+	saveCurrentOrder();
+	// FIXME: maybe later in unstable
+	// emit dataChanged(createIndex(index, 0), createIndex(index, columnCount(QModelIndex()) - 1));
+	return true;
+}
+
+bool ComponentList::revertToBase(int index)
+{
+	auto patch = versionPatch(index);
+	if (!patch->isRevertible())
+	{
+		qDebug() << "Patch" << patch->getID() << "is not revertible";
+		return false;
+	}
+	if(!revertPatch_internal(patch))
+	{
+		qCritical() << "Patch" << patch->getID() << "could not be reverted";
+		return false;
+	}
+	reapplyPatches();
+	saveCurrentOrder();
+	// FIXME: maybe later in unstable
+	// emit dataChanged(createIndex(index, 0), createIndex(index, columnCount(QModelIndex()) - 1));
+	return true;
+}
+
+ProfilePatchPtr ComponentList::versionPatch(const QString &id)
+{
+	for (auto patch : m_patches)
+	{
+		if (patch->getID() == id)
+		{
+			return patch;
+		}
+	}
+	return nullptr;
+}
+
+ProfilePatchPtr ComponentList::versionPatch(int index)
+{
+	if(index < 0 || index >= m_patches.size())
+		return nullptr;
+	return m_patches[index];
+}
+
+bool ComponentList::isVanilla()
+{
+	for(auto patchptr: m_patches)
+	{
+		if(patchptr->isCustom())
+			return false;
+	}
+	return true;
+}
+
+bool ComponentList::revertToVanilla()
+{
+	// remove patches, if present
+	auto VersionPatchesCopy = m_patches;
+	for(auto & it: VersionPatchesCopy)
+	{
+		if (!it->isCustom())
+		{
+			continue;
+		}
+		if(it->isRevertible() || it->isRemovable())
+		{
+			if(!remove(it->getID()))
+			{
+				qWarning() << "Couldn't remove" << it->getID() << "from profile!";
+				reapplyPatches();
+				saveCurrentOrder();
+				return false;
+			}
+		}
+	}
+	reapplyPatches();
+	saveCurrentOrder();
+	return true;
+}
+
+QVariant ComponentList::data(const QModelIndex &index, int role) const
+{
+	if (!index.isValid())
+		return QVariant();
+
+	int row = index.row();
+	int column = index.column();
+
+	if (row < 0 || row >= m_patches.size())
+		return QVariant();
+
+	auto patch = m_patches.at(row);
+
+	if (role == Qt::DisplayRole)
+	{
+		switch (column)
+		{
+		case 0:
+			return m_patches.at(row)->getName();
+		case 1:
+		{
+			if(patch->isCustom())
+			{
+				return QString("%1 (Custom)").arg(patch->getVersion());
+			}
+			else
+			{
+				return patch->getVersion();
+			}
+		}
+		default:
+			return QVariant();
+		}
+	}
+	if(role == Qt::DecorationRole)
+	{
+		switch(column)
+		{
+		case 0:
+		{
+			auto severity = patch->getProblemSeverity();
+			switch (severity)
+			{
+				case ProblemSeverity::Warning:
+					return "warning";
+				case ProblemSeverity::Error:
+					return "error";
+				default:
+					return QVariant();
+			}
+		}
+		default:
+		{
+			return QVariant();
+		}
+		}
+	}
+	return QVariant();
+}
+QVariant ComponentList::headerData(int section, Qt::Orientation orientation, int role) const
+{
+	if (orientation == Qt::Horizontal)
+	{
+		if (role == Qt::DisplayRole)
+		{
+			switch (section)
+			{
+			case 0:
+				return tr("Name");
+			case 1:
+				return tr("Version");
+			default:
+				return QVariant();
+			}
+		}
+	}
+	return QVariant();
+}
+Qt::ItemFlags ComponentList::flags(const QModelIndex &index) const
+{
+	if (!index.isValid())
+		return Qt::NoItemFlags;
+	return Qt::ItemIsSelectable | Qt::ItemIsEnabled;
+}
+
+int ComponentList::rowCount(const QModelIndex &parent) const
+{
+	return m_patches.size();
+}
+
+int ComponentList::columnCount(const QModelIndex &parent) const
+{
+	return 2;
+}
+
+void ComponentList::saveCurrentOrder() const
+{
+	ProfileUtils::PatchOrder order;
+	for(auto item: m_patches)
+	{
+		if(!item->isMoveable())
+			continue;
+		order.append(item->getID());
+	}
+	saveOrder_internal(order);
+}
+
+void ComponentList::move(const int index, const MoveDirection direction)
+{
+	int theirIndex;
+	if (direction == MoveUp)
+	{
+		theirIndex = index - 1;
+	}
+	else
+	{
+		theirIndex = index + 1;
+	}
+
+	if (index < 0 || index >= m_patches.size())
+		return;
+	if (theirIndex >= rowCount())
+		theirIndex = rowCount() - 1;
+	if (theirIndex == -1)
+		theirIndex = rowCount() - 1;
+	if (index == theirIndex)
+		return;
+	int togap = theirIndex > index ? theirIndex + 1 : theirIndex;
+
+	auto from = versionPatch(index);
+	auto to = versionPatch(theirIndex);
+
+	if (!from || !to || !to->isMoveable() || !from->isMoveable())
+	{
+		return;
+	}
+	beginMoveRows(QModelIndex(), index, index, QModelIndex(), togap);
+	m_patches.swap(index, theirIndex);
+	endMoveRows();
+	reapplyPatches();
+	saveCurrentOrder();
+}
+void ComponentList::resetOrder()
+{
+	resetOrder_internal();
+	reload();
+}
+
+bool ComponentList::reapplyPatches()
+{
+	try
+	{
+		clear();
+		for(auto file: m_patches)
+		{
+			qDebug() << "Applying" << file->getID() << (file->getProblemSeverity() == ProblemSeverity::Error ? "ERROR" : "GOOD");
+			file->applyTo(this);
+		}
+	}
+	catch (Exception & error)
+	{
+		clear();
+		qWarning() << "Couldn't apply profile patches because: " << error.cause();
+		return false;
+	}
+	return true;
+}
+
+static void applyString(const QString & from, QString & to)
+{
+	if(from.isEmpty())
+		return;
+	to = from;
+}
+
+void ComponentList::applyMinecraftVersion(const QString& id)
+{
+	applyString(id, this->m_minecraftVersion);
+}
+
+void ComponentList::applyAppletClass(const QString& appletClass)
+{
+	applyString(appletClass, this->m_appletClass);
+}
+
+void ComponentList::applyMainClass(const QString& mainClass)
+{
+	applyString(mainClass, this->m_mainClass);
+}
+
+void ComponentList::applyMinecraftArguments(const QString& minecraftArguments)
+{
+	applyString(minecraftArguments, this->m_minecraftArguments);
+}
+
+void ComponentList::applyMinecraftVersionType(const QString& type)
+{
+	applyString(type, this->m_minecraftVersionType);
+}
+
+void ComponentList::applyMinecraftAssets(MojangAssetIndexInfo::Ptr assets)
+{
+	if(assets)
+	{
+		m_minecraftAssets = assets;
+	}
+}
+
+void ComponentList::applyTraits(const QSet<QString>& traits)
+{
+	this->m_traits.unite(traits);
+}
+
+void ComponentList::applyTweakers(const QStringList& tweakers)
+{
+	// if the applied tweakers override an existing one, skip it. this effectively moves it later in the sequence
+	QStringList newTweakers;
+	for(auto & tweaker: m_tweakers)
+	{
+		if (tweakers.contains(tweaker))
+		{
+			continue;
+		}
+		newTweakers.append(tweaker);
+	}
+	// then just append the new tweakers (or moved original ones)
+	newTweakers += tweakers;
+	m_tweakers = newTweakers;
+}
+
+void ComponentList::applyJarMods(const QList<LibraryPtr>& jarMods)
+{
+	this->m_jarMods.append(jarMods);
+}
+
+static int findLibraryByName(QList<LibraryPtr> *haystack, const GradleSpecifier &needle)
+{
+	int retval = -1;
+	for (int i = 0; i < haystack->size(); ++i)
+	{
+		if (haystack->at(i)->rawName().matchName(needle))
+		{
+			// only one is allowed.
+			if (retval != -1)
+				return -1;
+			retval = i;
+		}
+	}
+	return retval;
+}
+
+void ComponentList::applyMods(const QList<LibraryPtr>& mods)
+{
+	QList<LibraryPtr> * list = &m_mods;
+	for(auto & mod: mods)
+	{
+		auto modCopy = Library::limitedCopy(mod);
+
+		// find the mod by name.
+		const int index = findLibraryByName(list, mod->rawName());
+		// mod not found? just add it.
+		if (index < 0)
+		{
+			list->append(modCopy);
+			return;
+		}
+
+		auto existingLibrary = list->at(index);
+		// if we are higher it means we should update
+		if (Version(mod->version()) > Version(existingLibrary->version()))
+		{
+			list->replace(index, modCopy);
+		}
+	}
+}
+
+void ComponentList::applyLibrary(LibraryPtr library)
+{
+	if(!library->isActive())
+	{
+		return;
+	}
+
+	QList<LibraryPtr> * list = &m_libraries;
+	if(library->isNative())
+	{
+		list = &m_nativeLibraries;
+	}
+
+	auto libraryCopy = Library::limitedCopy(library);
+
+	// find the library by name.
+	const int index = findLibraryByName(list, library->rawName());
+	// library not found? just add it.
+	if (index < 0)
+	{
+		list->append(libraryCopy);
+		return;
+	}
+
+	auto existingLibrary = list->at(index);
+	// if we are higher it means we should update
+	if (Version(library->version()) > Version(existingLibrary->version()))
+	{
+		list->replace(index, libraryCopy);
+	}
+}
+
+const LibraryPtr ComponentList::getMainJar() const
+{
+	return m_mainJar;
+}
+
+void ComponentList::applyMainJar(LibraryPtr jar)
+{
+	if(jar)
+	{
+		m_mainJar = jar;
+	}
+}
+
+void ComponentList::applyProblemSeverity(ProblemSeverity severity)
+{
+	if (m_problemSeverity < severity)
+	{
+		m_problemSeverity = severity;
+	}
+}
+
+
+QString ComponentList::getMinecraftVersion() const
+{
+	return m_minecraftVersion;
+}
+
+QString ComponentList::getAppletClass() const
+{
+	return m_appletClass;
+}
+
+QString ComponentList::getMainClass() const
+{
+	return m_mainClass;
+}
+
+const QSet<QString> &ComponentList::getTraits() const
+{
+	return m_traits;
+}
+
+const QStringList & ComponentList::getTweakers() const
+{
+	return m_tweakers;
+}
+
+bool ComponentList::hasTrait(const QString& trait) const
+{
+	return m_traits.contains(trait);
+}
+
+ProblemSeverity ComponentList::getProblemSeverity() const
+{
+	return m_problemSeverity;
+}
+
+QString ComponentList::getMinecraftVersionType() const
+{
+	return m_minecraftVersionType;
+}
+
+std::shared_ptr<MojangAssetIndexInfo> ComponentList::getMinecraftAssets() const
+{
+	if(!m_minecraftAssets)
+	{
+		return std::make_shared<MojangAssetIndexInfo>("legacy");
+	}
+	return m_minecraftAssets;
+}
+
+QString ComponentList::getMinecraftArguments() const
+{
+	return m_minecraftArguments;
+}
+
+const QList<LibraryPtr> & ComponentList::getJarMods() const
+{
+	return m_jarMods;
+}
+
+const QList<LibraryPtr> & ComponentList::getLibraries() const
+{
+	return m_libraries;
+}
+
+const QList<LibraryPtr> & ComponentList::getNativeLibraries() const
+{
+	return m_nativeLibraries;
+}
+
+void ComponentList::getLibraryFiles(const QString& architecture, QStringList& jars, QStringList& nativeJars, const QString& overridePath, const QString& tempPath) const
+{
+	QStringList native32, native64;
+	jars.clear();
+	nativeJars.clear();
+	for (auto lib : getLibraries())
+	{
+		lib->getApplicableFiles(currentSystem, jars, nativeJars, native32, native64, overridePath);
+	}
+	// NOTE: order is important here, add main jar last to the lists
+	if(m_mainJar)
+	{
+		// FIXME: HACK!! jar modding is weird and unsystematic!
+		if(m_jarMods.size())
+		{
+			QDir tempDir(tempPath);
+			jars.append(tempDir.absoluteFilePath("minecraft.jar"));
+		}
+		else
+		{
+			m_mainJar->getApplicableFiles(currentSystem, jars, nativeJars, native32, native64, overridePath);
+		}
+	}
+	for (auto lib : getNativeLibraries())
+	{
+		lib->getApplicableFiles(currentSystem, jars, nativeJars, native32, native64, overridePath);
+	}
+	if(architecture == "32")
+	{
+		nativeJars.append(native32);
+	}
+	else if(architecture == "64")
+	{
+		nativeJars.append(native64);
+	}
+}
+
+void ComponentList::installJarMods(QStringList selectedFiles)
+{
+	installJarMods_internal(selectedFiles);
+}
+
+void ComponentList::installCustomJar(QString selectedFile)
+{
+	installCustomJar_internal(selectedFile);
+}
+
+
+/*
+ * TODO: get rid of this. Get rid of all order numbers.
+ */
+int ComponentList::getFreeOrderNumber()
+{
+	int largest = 100;
+	// yes, I do realize this is dumb. The order thing itself is dumb. and to be removed next.
+	for(auto thing: m_patches)
+	{
+		int order = thing->getOrder();
+		if(order > largest)
+			largest = order;
+	}
+	return largest + 1;
+}
+
+void ComponentList::upgradeDeprecatedFiles_internal()
+{
+	auto versionJsonPath = FS::PathCombine(m_instance->instanceRoot(), "version.json");
+	auto customJsonPath = FS::PathCombine(m_instance->instanceRoot(), "custom.json");
+	auto mcJson = FS::PathCombine(m_instance->instanceRoot(), "patches" , "net.minecraft.json");
+
+	QString sourceFile;
+	QString renameFile;
+
+	// convert old crap.
+	if(QFile::exists(customJsonPath))
+	{
+		sourceFile = customJsonPath;
+		renameFile = versionJsonPath;
+	}
+	else if(QFile::exists(versionJsonPath))
+	{
+		sourceFile = versionJsonPath;
+	}
+	if(!sourceFile.isEmpty() && !QFile::exists(mcJson))
+	{
+		if(!FS::ensureFilePathExists(mcJson))
+		{
+			qWarning() << "Couldn't create patches folder for" << m_instance->name();
+			return;
+		}
+		if(!renameFile.isEmpty() && QFile::exists(renameFile))
+		{
+			if(!QFile::rename(renameFile, renameFile + ".old"))
+			{
+				qWarning() << "Couldn't rename" << renameFile << "to" << renameFile + ".old" << "in" << m_instance->name();
+				return;
+			}
+		}
+		auto file = ProfileUtils::parseJsonFile(QFileInfo(sourceFile), false);
+		ProfileUtils::removeLwjglFromPatch(file);
+		file->uid = "net.minecraft";
+		file->version = file->minecraftVersion;
+		file->name = "Minecraft";
+		auto data = OneSixVersionFormat::versionFileToJson(file, false).toJson();
+		QSaveFile newPatchFile(mcJson);
+		if(!newPatchFile.open(QIODevice::WriteOnly))
+		{
+			newPatchFile.cancelWriting();
+			qWarning() << "Couldn't open main patch for writing in" << m_instance->name();
+			return;
+		}
+		newPatchFile.write(data);
+		if(!newPatchFile.commit())
+		{
+			qWarning() << "Couldn't save main patch in" << m_instance->name();
+			return;
+		}
+		if(!QFile::rename(sourceFile, sourceFile + ".old"))
+		{
+			qWarning() << "Couldn't rename" << sourceFile << "to" << sourceFile + ".old" << "in" << m_instance->name();
+			return;
+		}
+	}
+}
+
+void ComponentList::loadDefaultBuiltinPatches_internal()
+{
+	auto addBuiltinPatch = [&](const QString &uid, const QString intendedVersion, int order)
+	{
+		auto jsonFilePath = FS::PathCombine(m_instance->instanceRoot(), "patches" , uid + ".json");
+		// load up the base minecraft patch
+		ProfilePatchPtr profilePatch;
+		if(QFile::exists(jsonFilePath))
+		{
+			auto file = ProfileUtils::parseJsonFile(QFileInfo(jsonFilePath), false);
+			if(file->version.isEmpty())
+			{
+				file->version = intendedVersion;
+			}
+			profilePatch = std::make_shared<ProfilePatch>(file, jsonFilePath);
+			profilePatch->setVanilla(false);
+			profilePatch->setRevertible(true);
+		}
+		else
+		{
+			auto metaVersion = ENV.metadataIndex()->get(uid, intendedVersion);
+			profilePatch = std::make_shared<ProfilePatch>(metaVersion);
+			profilePatch->setVanilla(true);
+		}
+		profilePatch->setOrder(order);
+		appendPatch(profilePatch);
+	};
+	addBuiltinPatch("net.minecraft", m_instance->getComponentVersion("net.minecraft"), -2);
+	addBuiltinPatch("org.lwjgl", m_instance->getComponentVersion("org.lwjgl"), -1);
+}
+
+void ComponentList::loadUserPatches_internal()
+{
+	// first, collect all patches (that are not builtins of OneSix) and load them
+	QMap<QString, ProfilePatchPtr> loadedPatches;
+	QDir patchesDir(FS::PathCombine(m_instance->instanceRoot(),"patches"));
+	for (auto info : patchesDir.entryInfoList(QStringList() << "*.json", QDir::Files))
+	{
+		// parse the file
+		qDebug() << "Reading" << info.fileName();
+		auto file = ProfileUtils::parseJsonFile(info, true);
+		// ignore builtins
+		if (file->uid == "net.minecraft")
+			continue;
+		if (file->uid == "org.lwjgl")
+			continue;
+		auto patch = std::make_shared<ProfilePatch>(file, info.filePath());
+		patch->setRemovable(true);
+		patch->setMovable(true);
+		if(ENV.metadataIndex()->hasUid(file->uid))
+		{
+			// FIXME: requesting a uid/list creates it in the index... this allows reverting to possibly invalid versions...
+			patch->setRevertible(true);
+		}
+		loadedPatches[file->uid] = patch;
+	}
+	// these are 'special'... if not already loaded from instance files, grab them from the metadata repo.
+	auto loadSpecial = [&](const QString & uid, int order)
+	{
+		auto patchVersion = m_instance->getComponentVersion(uid);
+		if(!patchVersion.isEmpty() && !loadedPatches.contains(uid))
+		{
+			auto patch = std::make_shared<ProfilePatch>(ENV.metadataIndex()->get(uid, patchVersion));
+			patch->setOrder(order);
+			patch->setVanilla(true);
+			patch->setRemovable(true);
+			patch->setMovable(true);
+			loadedPatches[uid] = patch;
+		}
+	};
+	loadSpecial("net.minecraftforge", 5);
+	loadSpecial("com.mumfrey.liteloader", 10);
+
+	// now add all the patches by user sort order
+	ProfileUtils::PatchOrder userOrder;
+	ProfileUtils::readOverrideOrders(FS::PathCombine(m_instance->instanceRoot(), "order.json"), userOrder);
+	for (auto uid : userOrder)
+	{
+		// ignore builtins
+		if (uid == "net.minecraft")
+			continue;
+		if (uid == "org.lwjgl")
+			continue;
+		// ordering has a patch that is gone?
+		if(!loadedPatches.contains(uid))
+		{
+			continue;
+		}
+		appendPatch(loadedPatches.take(uid));
+	}
+
+	// is there anything left to sort?
+	if(loadedPatches.isEmpty())
+	{
+		// TODO: save the order here?
+		return;
+	}
+
+	// inserting into multimap by order number as key sorts the patches and detects duplicates
+	QMultiMap<int, ProfilePatchPtr> files;
+	auto iter = loadedPatches.begin();
+	while(iter != loadedPatches.end())
+	{
+		files.insert((*iter)->getOrder(), *iter);
+		iter++;
+	}
+
+	// then just extract the patches and put them in the list
+	for (auto order : files.keys())
+	{
+		const auto &values = files.values(order);
+		for(auto &value: values)
+		{
+			// TODO: put back the insertion of problem messages here, so the user knows about the id duplication
+			appendPatch(value);
+		}
+	}
+	// TODO: save the order here?
+}
+
+
+void ComponentList::load_internal()
+{
+	clearPatches();
+	upgradeDeprecatedFiles_internal();
+	loadDefaultBuiltinPatches_internal();
+	loadUserPatches_internal();
+}
+
+bool ComponentList::saveOrder_internal(ProfileUtils::PatchOrder order) const
+{
+	return ProfileUtils::writeOverrideOrders(FS::PathCombine(m_instance->instanceRoot(), "order.json"), order);
+}
+
+bool ComponentList::resetOrder_internal()
+{
+	return QDir(m_instance->instanceRoot()).remove("order.json");
+}
+
+bool ComponentList::removePatch_internal(ProfilePatchPtr patch)
+{
+	bool ok = true;
+	// first, remove the patch file. this ensures it's not used anymore
+	auto fileName = patch->getFilename();
+	if(fileName.size())
+	{
+		QFile patchFile(fileName);
+		if(patchFile.exists() && !patchFile.remove())
+		{
+			qCritical() << "File" << fileName << "could not be removed because:" << patchFile.errorString();
+			return false;
+		}
+	}
+	if(!m_instance->getComponentVersion(patch->getID()).isEmpty())
+	{
+		m_instance->setComponentVersion(patch->getID(), QString());
+	}
+
+	// FIXME: we need a generic way of removing local resources, not just jar mods...
+	auto preRemoveJarMod = [&](LibraryPtr jarMod) -> bool
+	{
+		if (!jarMod->isLocal())
+		{
+			return true;
+		}
+		QStringList jar, temp1, temp2, temp3;
+		jarMod->getApplicableFiles(currentSystem, jar, temp1, temp2, temp3, m_instance->jarmodsPath().absolutePath());
+		QFileInfo finfo (jar[0]);
+		if(finfo.exists())
+		{
+			QFile jarModFile(jar[0]);
+			if(!jarModFile.remove())
+			{
+				qCritical() << "File" << jar[0] << "could not be removed because:" << jarModFile.errorString();
+				return false;
+			}
+			return true;
+		}
+		return true;
+	};
+
+	auto &jarMods = patch->getVersionFile()->jarMods;
+	for(auto &jarmod: jarMods)
+	{
+		ok &= preRemoveJarMod(jarmod);
+	}
+	return ok;
+}
+
+bool ComponentList::customizePatch_internal(ProfilePatchPtr patch)
+{
+	if(patch->isCustom())
+	{
+		return false;
+	}
+
+	auto filename = FS::PathCombine(m_instance->instanceRoot(), "patches" , patch->getID() + ".json");
+	if(!FS::ensureFilePathExists(filename))
+	{
+		return false;
+	}
+	// FIXME: get rid of this try-catch.
+	try
+	{
+		QSaveFile jsonFile(filename);
+		if(!jsonFile.open(QIODevice::WriteOnly))
+		{
+			return false;
+		}
+		auto vfile = patch->getVersionFile();
+		if(!vfile)
+		{
+			return false;
+		}
+		auto document = OneSixVersionFormat::versionFileToJson(vfile, true);
+		jsonFile.write(document.toJson());
+		if(!jsonFile.commit())
+		{
+			return false;
+		}
+		load_internal();
+	}
+	catch (Exception &error)
+	{
+		qWarning() << "Version could not be loaded:" << error.cause();
+	}
+	return true;
+}
+
+bool ComponentList::revertPatch_internal(ProfilePatchPtr patch)
+{
+	if(!patch->isCustom())
+	{
+		// already not custom
+		return true;
+	}
+	auto filename = patch->getFilename();
+	if(!QFile::exists(filename))
+	{
+		// already gone / not custom
+		return true;
+	}
+	// just kill the file and reload
+	bool result = QFile::remove(filename);
+	// FIXME: get rid of this try-catch.
+	try
+	{
+		load_internal();
+	}
+	catch (Exception &error)
+	{
+		qWarning() << "Version could not be loaded:" << error.cause();
+	}
+	return result;
+}
+
+bool ComponentList::installJarMods_internal(QStringList filepaths)
+{
+	QString patchDir = FS::PathCombine(m_instance->instanceRoot(), "patches");
+	if(!FS::ensureFolderPathExists(patchDir))
+	{
+		return false;
+	}
+
+	if (!FS::ensureFolderPathExists(m_instance->jarModsDir()))
+	{
+		return false;
+	}
+
+	for(auto filepath:filepaths)
+	{
+		QFileInfo sourceInfo(filepath);
+		auto uuid = QUuid::createUuid();
+		QString id = uuid.toString().remove('{').remove('}');
+		QString target_filename = id + ".jar";
+		QString target_id = "org.multimc.jarmod." + id;
+		QString target_name = sourceInfo.completeBaseName() + " (jar mod)";
+		QString finalPath = FS::PathCombine(m_instance->jarModsDir(), target_filename);
+
+		QFileInfo targetInfo(finalPath);
+		if(targetInfo.exists())
+		{
+			return false;
+		}
+
+		if (!QFile::copy(sourceInfo.absoluteFilePath(),QFileInfo(finalPath).absoluteFilePath()))
+		{
+			return false;
+		}
+
+		auto f = std::make_shared<VersionFile>();
+		auto jarMod = std::make_shared<Library>();
+		jarMod->setRawName(GradleSpecifier("org.multimc.jarmods:" + id + ":1"));
+		jarMod->setFilename(target_filename);
+		jarMod->setDisplayName(sourceInfo.completeBaseName());
+		jarMod->setHint("local");
+		f->jarMods.append(jarMod);
+		f->name = target_name;
+		f->uid = target_id;
+		f->order = getFreeOrderNumber();
+		QString patchFileName = FS::PathCombine(patchDir, target_id + ".json");
+
+		QFile file(patchFileName);
+		if (!file.open(QFile::WriteOnly))
+		{
+			qCritical() << "Error opening" << file.fileName()
+						<< "for reading:" << file.errorString();
+			return false;
+		}
+		file.write(OneSixVersionFormat::versionFileToJson(f, true).toJson());
+		file.close();
+
+		auto patch = std::make_shared<ProfilePatch>(f, patchFileName);
+		patch->setMovable(true);
+		patch->setRemovable(true);
+		appendPatch(patch);
+	}
+	saveCurrentOrder();
+	reapplyPatches();
+	return true;
+}
+
+bool ComponentList::installCustomJar_internal(QString filepath)
+{
+	QString patchDir = FS::PathCombine(m_instance->instanceRoot(), "patches");
+	if(!FS::ensureFolderPathExists(patchDir))
+	{
+		return false;
+	}
+
+	QString libDir = m_instance->getLocalLibraryPath();
+	if (!FS::ensureFolderPathExists(libDir))
+	{
+		return false;
+	}
+
+	auto specifier = GradleSpecifier("org.multimc:customjar:1");
+	QFileInfo sourceInfo(filepath);
+	QString target_filename = specifier.getFileName();
+	QString target_id = specifier.artifactId();
+	QString target_name = sourceInfo.completeBaseName() + " (custom jar)";
+	QString finalPath = FS::PathCombine(libDir, target_filename);
+
+	QFileInfo jarInfo(finalPath);
+	if (jarInfo.exists())
+	{
+		if(!QFile::remove(finalPath))
+		{
+			return false;
+		}
+	}
+	if (!QFile::copy(filepath, finalPath))
+	{
+		return false;
+	}
+
+	auto f = std::make_shared<VersionFile>();
+	auto jarMod = std::make_shared<Library>();
+	jarMod->setRawName(specifier);
+	jarMod->setDisplayName(sourceInfo.completeBaseName());
+	jarMod->setHint("local");
+	f->mainJar = jarMod;
+	f->name = target_name;
+	f->uid = target_id;
+	f->order = getFreeOrderNumber();
+	QString patchFileName = FS::PathCombine(patchDir, target_id + ".json");
+
+	QFile file(patchFileName);
+	if (!file.open(QFile::WriteOnly))
+	{
+		qCritical() << "Error opening" << file.fileName()
+					<< "for reading:" << file.errorString();
+		return false;
+	}
+	file.write(OneSixVersionFormat::versionFileToJson(f, true).toJson());
+	file.close();
+
+	auto patch = std::make_shared<ProfilePatch>(f, patchFileName);
+	patch->setMovable(true);
+	patch->setRemovable(true);
+	appendPatch(patch);
+
+	saveCurrentOrder();
+	reapplyPatches();
+	return true;
+}
\ No newline at end of file