1 files changed, 349 insertions, 0 deletions
diff --git a/logic/minecraft/VersionBuilder.cpp b/logic/minecraft/VersionBuilder.cpp
new file mode 100644
index 00000000..ddcf6333
--- /dev/null
+++ b/logic/minecraft/VersionBuilder.cpp
@@ -0,0 +1,349 @@
+/* Copyright 2013 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 <QList>
+#include <QJsonObject>
+#include <QJsonArray>
+#include <QJsonDocument>
+#include <QFile>
+#include <QFileInfo>
+#include <QMessageBox>
+#include <QObject>
+#include <QDir>
+#include <QDebug>
+#include <qresource.h>
+#include <modutils.h>
+
+#include "MultiMC.h"
+#include "logic/minecraft/VersionBuilder.h"
+#include "logic/minecraft/InstanceVersion.h"
+#include "logic/minecraft/OneSixRule.h"
+#include "logic/minecraft/VersionPatch.h"
+#include "logic/minecraft/VersionFile.h"
+#include "VersionBuildError.h"
+#include "MinecraftVersionList.h"
+
+#include "logic/OneSixInstance.h"
+#include "logic/MMCJson.h"
+
+#include "logger/QsLog.h"
+
+VersionBuilder::VersionBuilder()
+{
+}
+
+void VersionBuilder::build(InstanceVersion *version, OneSixInstance *instance,
+						   const QStringList &external)
+{
+	VersionBuilder builder;
+	builder.m_version = version;
+	builder.m_instance = instance;
+	builder.external_patches = external;
+	builder.buildInternal();
+}
+
+void VersionBuilder::readJsonAndApplyToVersion(InstanceVersion *version, const QJsonObject &obj)
+{
+	VersionBuilder builder;
+	builder.m_version = version;
+	builder.m_instance = 0;
+	builder.readJsonAndApply(obj);
+}
+
+void VersionBuilder::buildFromCustomJson()
+{
+	QLOG_INFO() << "Building version from custom.json within the instance.";
+	QLOG_INFO() << "Reading custom.json";
+	auto file = parseJsonFile(QFileInfo(instance_root.absoluteFilePath("custom.json")), false);
+	file->name = "custom.json";
+	file->filename = "custom.json";
+	file->fileId = "org.multimc.custom.json";
+	file->order = -1;
+	file->version = QString();
+	m_version->VersionPatches.append(file);
+	m_version->finalize();
+	return;
+}
+
+void VersionBuilder::buildFromVersionJson()
+{
+	QLOG_INFO() << "Building version from version.json and patches within the instance.";
+	QLOG_INFO() << "Reading version.json";
+	auto file = parseJsonFile(QFileInfo(instance_root.absoluteFilePath("version.json")), false);
+	file->name = "Minecraft";
+	file->fileId = "org.multimc.version.json";
+	file->order = -1;
+	file->version = m_instance->intendedVersionId();
+	file->mcVersion = m_instance->intendedVersionId();
+	m_version->VersionPatches.append(file);
+
+	// load all patches, put into map for ordering, apply in the right order
+	readInstancePatches();
+
+	// some final touches
+	m_version->finalize();
+}
+
+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));
+		}
+		files.insert(file->order, qMakePair(info.fileName(), file));
+	}
+	for (auto order : files.keys())
+	{
+		auto &filePair = files[order];
+		m_version->VersionPatches.append(filePair.second);
+	}
+}
+
+void VersionBuilder::buildFromExternalPatches()
+{
+	QLOG_INFO() << "Building version from external files.";
+	int externalOrder = -1;
+	for (auto fileName : external_patches)
+	{
+		QLOG_INFO() << "Reading" << fileName;
+		auto file = parseJsonFile(QFileInfo(fileName), false, fileName.endsWith("pack.json"));
+		file->name = QFileInfo(fileName).fileName();
+		file->fileId = "org.multimc.external." + file->name;
+		file->order = (externalOrder += 1);
+		file->version = QString();
+		file->mcVersion = QString();
+		m_version->VersionPatches.append(file);
+	}
+	// some final touches
+	m_version->finalize();
+}
+
+void VersionBuilder::buildFromMultilayer()
+{
+	QLOG_INFO() << "Building version from multilayered sources.";
+	// just the builtin stuff for now
+	auto minecraftList = MMC->minecraftlist();
+	auto mcversion = minecraftList->findVersion(m_instance->intendedVersionId());
+	auto minecraftPatch = std::dynamic_pointer_cast<VersionPatch>(mcversion);
+	if (!minecraftPatch)
+	{
+		throw VersionIncomplete("net.minecraft");
+	}
+	minecraftPatch->setOrder(-2);
+	m_version->VersionPatches.append(minecraftPatch);
+
+	// TODO: this is obviously fake.
+	QResource LWJGL(":/versions/LWJGL/2.9.1.json");
+	auto lwjgl = parseJsonFile(LWJGL.absoluteFilePath(), false, false);
+	auto lwjglPatch = std::dynamic_pointer_cast<VersionPatch>(lwjgl);
+	if (!lwjglPatch)
+	{
+		throw VersionIncomplete("org.lwjgl");
+	}
+	lwjglPatch->setOrder(-1);
+	m_version->VersionPatches.append(lwjglPatch);
+
+	// load all patches, put into map for ordering, apply in the right order
+	readInstancePatches();
+
+	m_version->finalize();
+}
+
+void VersionBuilder::buildInternal()
+{
+	m_version->VersionPatches.clear();
+	instance_root = QDir(m_instance->instanceRoot());
+	// if we do external files, do just those.
+	if (!external_patches.isEmpty())
+	{
+		buildFromExternalPatches();
+	}
+	// else, if there's custom json, we just do that.
+	else if (QFile::exists(instance_root.absoluteFilePath("custom.json")))
+	{
+		buildFromCustomJson();
+	}
+	// version.json -> patches/*.json
+	else if (QFile::exists(instance_root.absoluteFilePath("version.json")))
+	{
+		buildFromVersionJson();
+	}
+	else
+	{
+		buildFromMultilayer();
+	}
+}
+
+void VersionBuilder::readJsonAndApply(const QJsonObject &obj)
+{
+	m_version->clear();
+
+	auto file = VersionFile::fromJson(QJsonDocument(obj), QString(), false);
+
+	file->applyTo(m_version);
+	m_version->VersionPatches.append(file);
+}
+
+VersionFilePtr VersionBuilder::parseJsonFile(const QFileInfo &fileInfo, const bool requireOrder,
+											 bool isFTB)
+{
+	QFile file(fileInfo.absoluteFilePath());
+	if (!file.open(QFile::ReadOnly))
+	{
+		throw JSONValidationError(QObject::tr("Unable to open the version file %1: %2.")
+									  .arg(fileInfo.fileName(), file.errorString()));
+	}
+	QJsonParseError error;
+	QJsonDocument doc = QJsonDocument::fromJson(file.readAll(), &error);
+	if (error.error != QJsonParseError::NoError)
+	{
+		throw JSONValidationError(
+			QObject::tr("Unable to process the version file %1: %2 at %3.")
+				.arg(fileInfo.fileName(), error.errorString())
+				.arg(error.offset));
+	}
+	return VersionFile::fromJson(doc, file.fileName(), requireOrder, isFTB);
+}
+
+VersionFilePtr VersionBuilder::parseBinaryJsonFile(const QFileInfo &fileInfo)
+{
+	QFile file(fileInfo.absoluteFilePath());
+	if (!file.open(QFile::ReadOnly))
+	{
+		throw JSONValidationError(QObject::tr("Unable to open the version file %1: %2.")
+									  .arg(fileInfo.fileName(), file.errorString()));
+	}
+	QJsonDocument doc = QJsonDocument::fromBinaryData(file.readAll());
+	file.close();
+	if (doc.isNull())
+	{
+		file.remove();
+		throw JSONValidationError(
+			QObject::tr("Unable to process the version file %1.").arg(fileInfo.fileName()));
+	}
+	return VersionFile::fromJson(doc, file.fileName(), false, false);
+}
+
+static const int currentOrderFileVersion = 1;
+
+bool VersionBuilder::readOverrideOrders(OneSixInstance *instance, PatchOrder &order)
+{
+	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 false;
+	}
+
+	// and it's valid JSON
+	QJsonParseError error;
+	QJsonDocument doc = QJsonDocument::fromJson(orderFile.readAll(), &error);
+	if (error.error != QJsonParseError::NoError)
+	{
+		QLOG_ERROR() << "Couldn't parse" << orderFile.fileName() << ":" << error.errorString();
+		QLOG_WARN() << "Ignoring overriden order";
+		return false;
+	}
+
+	// and then read it and process it if all above is true.
+	try
+	{
+		auto obj = MMCJson::ensureObject(doc);
+		// check order file version.
+		auto version = MMCJson::ensureInteger(obj.value("version"), "version");
+		if (version != currentOrderFileVersion)
+		{
+			throw JSONValidationError(QObject::tr("Invalid order file version, expected %1")
+										  .arg(currentOrderFileVersion));
+		}
+		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";
+		order.clear();
+		return false;
+	}
+	return true;
+}
+
+bool VersionBuilder::writeOverrideOrders(OneSixInstance *instance, const PatchOrder &order)
+{
+	QJsonObject obj;
+	obj.insert("version", currentOrderFileVersion);
+	QJsonArray orderArray;
+	for(auto str: order)
+	{
+		orderArray.append(str);
+	}
+	obj.insert("order", orderArray);
+	QFile orderFile(instance->instanceRoot() + "/order.json");
+	if (!orderFile.open(QFile::WriteOnly))
+	{
+		QLOG_ERROR() << "Couldn't open" << orderFile.fileName()
+					 << "for writing:" << orderFile.errorString();
+		return false;
+	}
+	orderFile.write(QJsonDocument(obj).toJson(QJsonDocument::Indented));
+	return true;
+}