New, simpler and versioned format for the patch load order.

logic/minecraft/InstanceVersion.cpp

@@ -33,8 +33,9 @@ InstanceVersion::InstanceVersion(OneSixInstance *instance, QObject *parent)
 
 void InstanceVersion::reload(const QStringList &external)
 {
+	m_externalPatches = external;
 	beginResetModel();
-	VersionBuilder::build(this, m_instance, external);
+	VersionBuilder::build(this, m_instance, m_externalPatches);
 	reapply(true);
 	endResetModel();
 }
@@ -87,10 +88,11 @@ bool InstanceVersion::remove(const int index)
 	}
 	if(!QFile::remove(VersionPatches.at(index)->getPatchFilename()))
 		return false;
-	beginResetModel();
+	beginRemoveRows(QModelIndex(), index, index);
 	VersionPatches.removeAt(index);
+	endRemoveRows();
 	reapply(true);
-	endResetModel();
+	saveCurrentOrder();
 	return true;
 }
 
@@ -173,11 +175,13 @@ bool InstanceVersion::revertToVanilla()
 			if(!preremove(*it))
 			{
 				endResetModel();
+				saveCurrentOrder();
 				return false;
 			}
 			if(!QFile::remove((*it)->getPatchFilename()))
 			{
 				endResetModel();
+				saveCurrentOrder();
 				return false;
 			}
 			it = VersionPatches.erase(it);
@@ -187,6 +191,7 @@ bool InstanceVersion::revertToVanilla()
 	}
 	reapply(true);
 	endResetModel();
+	saveCurrentOrder();
 	return true;
 }
 
@@ -295,32 +300,17 @@ int InstanceVersion::columnCount(const QModelIndex &parent) const
 	return 2;
 }
 
-QMap<QString, int> InstanceVersion::getExistingOrder() const
+void InstanceVersion::saveCurrentOrder() const
 {
-	QMap<QString, int> order;
+	PatchOrder order;
 	int index = 0;
-	// overriden
-	{
-		QMap<QString, int> overridenOrder = VersionBuilder::readOverrideOrders(m_instance);
-		for (auto id : order.keys())
-		{
-			if (overridenOrder.contains(id))
-			{
-				order[id] = overridenOrder[id];
-			}
-		}
-	}
 	for(auto item: VersionPatches)
 	{
-		// things with fixed (negative) order.
 		if(!item->isMoveable())
 			continue;
-		// the other things.
+		order.append(item->getPatchID());
-		auto id = item->getPatchID();
-		order[id] = index;
-		index++;
 	}
-	return order;
+	VersionBuilder::writeOverrideOrders(m_instance, order);
 }
 
 void InstanceVersion::move(const int index, const MoveDirection direction)
@@ -352,16 +342,16 @@ void InstanceVersion::move(const int index, const MoveDirection direction)
 	{
 		return;
 	}
-
 	beginMoveRows(QModelIndex(), index, index, QModelIndex(), togap);
 	VersionPatches.swap(index, theirIndex);
 	endMoveRows();
+	saveCurrentOrder();
 	reapply();
 }
 void InstanceVersion::resetOrder()
 {
 	QDir(m_instance->instanceRoot()).remove("order.json");
-	reapply();
+	reload(m_externalPatches);
 }
 
 void InstanceVersion::reapply(const bool alreadyReseting)
@@ -477,6 +467,7 @@ void InstanceVersion::installJarModByFilename(QString filepath)
 	beginInsertRows(QModelIndex(), index, index);
 	VersionPatches.append(f);
 	endInsertRows();
+	saveCurrentOrder();
 }
 
 int InstanceVersion::getFreeOrderNumber()

logic/minecraft/InstanceVersion.h

@@ -175,7 +175,8 @@ public:
 	VersionPatchPtr versionPatch(int index);
 
 private:
+	QStringList m_externalPatches;
 	OneSixInstance *m_instance;
-	QMap<QString, int> getExistingOrder() const;
+	void saveCurrentOrder() const;
 	int getFreeOrderNumber();
 };

logic/minecraft/VersionBuilder.cpp

@@ -73,10 +73,6 @@ void VersionBuilder::buildFromCustomJson()
 	file->order = -1;
 	file->version = QString();
 	m_version->VersionPatches.append(file);
-	// QObject::tr("The version descriptors of this instance are not compatible with the
-	// current version of MultiMC"));
-	// QObject::tr("Error while applying %1. Please check MultiMC-0.log for more info.")
-	// some final touches
 	m_version->finalize();
 	return;
 }
@@ -102,18 +98,48 @@ void VersionBuilder::buildFromVersionJson()
 
 void VersionBuilder::readInstancePatches()
 {
+	PatchOrder userOrder;
+	readOverrideOrders(m_instance, userOrder);
 	QDir patches(instance_root.absoluteFilePath("patches/"));
+
+	// first, load things by sort order.
+	for (auto id : userOrder)
+	{
+		// ignore builtins
+		if (id == "net.minecraft")
+			continue;
+		if (id == "org.lwjgl")
+			continue;
+		// parse the file
+		QString filename = patches.absoluteFilePath(id + ".json");
+		QLOG_INFO() << "Reading" << filename << "by user order";
+		auto file = parseJsonFile(QFileInfo(filename), false);
+		// sanity check. prevent tampering with files.
+		if (file->fileId != id)
+		{
+			throw VersionBuildError(
+				QObject::tr("load id %1 does not match internal id %2").arg(id, file->fileId));
+		}
+		m_version->VersionPatches.append(file);
+	}
+	// now load the rest by internal preference.
 	QMap<int, QPair<QString, VersionFilePtr>> files;
 	for (auto info : patches.entryInfoList(QStringList() << "*.json", QDir::Files))
 	{
+		// parse the file
 		QLOG_INFO() << "Reading" << info.fileName();
 		auto file = parseJsonFile(info, true);
+		// ignore builtins
 		if (file->fileId == "net.minecraft")
 			continue;
 		if (file->fileId == "org.lwjgl")
 			continue;
+		// do not load what we already loaded in the first pass
+		if (userOrder.contains(file->fileId))
+			continue;
 		if (files.contains(file->order))
 		{
+			// FIXME: do not throw?
 			throw VersionBuildError(QObject::tr("%1 has the same order as %2")
 										.arg(file->fileId, files[file->order].second->fileId));
 		}
@@ -205,13 +231,9 @@ void VersionBuilder::readJsonAndApply(const QJsonObject &obj)
 	m_version->clear();
 
 	auto file = VersionFile::fromJson(QJsonDocument(obj), QString(), false);
-	// QObject::tr("Error while reading. Please check MultiMC-0.log for more info."));
 
 	file->applyTo(m_version);
 	m_version->VersionPatches.append(file);
-	// QObject::tr("Error while applying. Please check MultiMC-0.log for more info."));
-	// QObject::tr("The version descriptors of this instance are not compatible with the current
-	// version of MultiMC"));
 }
 
 VersionFilePtr VersionBuilder::parseJsonFile(const QFileInfo &fileInfo, const bool requireOrder,
@@ -233,8 +255,6 @@ VersionFilePtr VersionBuilder::parseJsonFile(const QFileInfo &fileInfo, const bo
 				.arg(error.offset));
 	}
 	return VersionFile::fromJson(doc, file.fileName(), requireOrder, isFTB);
-	// QObject::tr("Error while reading %1. Please check MultiMC-0.log for more
-	// info.").arg(file.fileName());
 }
 
 VersionFilePtr VersionBuilder::parseBinaryJsonFile(const QFileInfo &fileInfo)
@@ -256,22 +276,17 @@ VersionFilePtr VersionBuilder::parseBinaryJsonFile(const QFileInfo &fileInfo)
 	return VersionFile::fromJson(doc, file.fileName(), false, false);
 }
 
-QMap<QString, int> VersionBuilder::readOverrideOrders(OneSixInstance *instance)
+static const int currentOrderFileVersion = 1;
+
+bool VersionBuilder::readOverrideOrders(OneSixInstance *instance, PatchOrder &order)
 {
-	QMap<QString, int> out;
-
-	// make sure the order file exists
-	if (!QDir(instance->instanceRoot()).exists("order.json"))
-		return out;
-
-	// and it can be opened
 	QFile orderFile(instance->instanceRoot() + "/order.json");
 	if (!orderFile.open(QFile::ReadOnly))
 	{
 		QLOG_ERROR() << "Couldn't open" << orderFile.fileName()
 					 << " for reading:" << orderFile.errorString();
 		QLOG_WARN() << "Ignoring overriden order";
-		return out;
+		return false;
 	}
 
 	// and it's valid JSON
@@ -281,42 +296,46 @@ QMap<QString, int> VersionBuilder::readOverrideOrders(OneSixInstance *instance)
 	{
 		QLOG_ERROR() << "Couldn't parse" << orderFile.fileName() << ":" << error.errorString();
 		QLOG_WARN() << "Ignoring overriden order";
-		return out;
+		return false;
 	}
 
 	// and then read it and process it if all above is true.
 	try
 	{
 		auto obj = MMCJson::ensureObject(doc);
-		for (auto it = obj.begin(); it != obj.end(); ++it)
+		// check order file version.
+		auto version = MMCJson::ensureInteger(obj.value("version"), "version");
+		if (version != currentOrderFileVersion)
 		{
-			if (it.key().startsWith("org.multimc."))
+			throw JSONValidationError(QObject::tr("Invalid order file version, expected %1")
-			{
+										  .arg(currentOrderFileVersion));
-				continue;
 		}
-			out.insert(it.key(), MMCJson::ensureInteger(it.value()));
+		auto orderArray = MMCJson::ensureArray(obj.value("order"));
+		for(auto item: orderArray)
+		{
+			order.append(MMCJson::ensureString(item));
 		}
 	}
 	catch (JSONValidationError &err)
 	{
 		QLOG_ERROR() << "Couldn't parse" << orderFile.fileName() << ": bad file format";
 		QLOG_WARN() << "Ignoring overriden order";
-		return out;
+		order.clear();
+		return false;
 	}
-	return out;
+	return true;
 }
 
-bool VersionBuilder::writeOverrideOrders(const QMap<QString, int> &order,
+bool VersionBuilder::writeOverrideOrders(OneSixInstance *instance, const PatchOrder &order)
-										 OneSixInstance *instance)
 {
 	QJsonObject obj;
-	for (auto it = order.cbegin(); it != order.cend(); ++it)
+	obj.insert("version", currentOrderFileVersion);
+	QJsonArray orderArray;
+	for(auto str: order)
 	{
-		int order = it.value();
+		orderArray.append(str);
-		if(order < 0)
-			continue;
-		obj.insert(it.key(), it.value());
 	}
+	obj.insert("order", orderArray);
 	QFile orderFile(instance->instanceRoot() + "/order.json");
 	if (!orderFile.open(QFile::WriteOnly))
 	{

logic/minecraft/VersionBuilder.h

@@ -24,6 +24,8 @@ class OneSixInstance;
 class QJsonObject;
 class QFileInfo;
 
+typedef QStringList PatchOrder;
+
 class VersionBuilder
 {
 	VersionBuilder();
@@ -33,8 +35,8 @@ public:
 	static VersionFilePtr parseJsonFile(const QFileInfo &fileInfo, const bool requireOrder, bool isFTB = false);
 	static VersionFilePtr parseBinaryJsonFile(const QFileInfo &fileInfo);
 	
-	static QMap<QString, int> readOverrideOrders(OneSixInstance *instance);
+	bool readOverrideOrders(OneSixInstance *instance, PatchOrder &order);
-	static bool writeOverrideOrders(const QMap<QString, int> &order, OneSixInstance *instance);
+	static bool writeOverrideOrders(OneSixInstance *instance, const PatchOrder &order);
 
 private:
 	InstanceVersion *m_version;