1 files changed, 142 insertions, 0 deletions
diff --git a/api/logic/minecraft/legacy/LegacyUpgradeTask.cpp b/api/logic/minecraft/legacy/LegacyUpgradeTask.cpp
new file mode 100644
index 00000000..6cda3e4d
--- /dev/null
+++ b/api/logic/minecraft/legacy/LegacyUpgradeTask.cpp
@@ -0,0 +1,142 @@
+#include "LegacyUpgradeTask.h"
+#include "BaseInstanceProvider.h"
+#include "settings/INISettingsObject.h"
+#include "FileSystem.h"
+#include "NullInstance.h"
+#include "pathmatcher/RegexpMatcher.h"
+#include <QtConcurrentRun>
+#include "LegacyInstance.h"
+#include "minecraft/MinecraftInstance.h"
+#include "minecraft/ComponentList.h"
+#include "classparser.h"
+
+LegacyUpgradeTask::LegacyUpgradeTask(SettingsObjectPtr settings, const QString & stagingPath, InstancePtr origInstance, const QString & newName)
+{
+	m_globalSettings = settings;
+	m_stagingPath = stagingPath;
+	m_origInstance = origInstance;
+	m_newName = newName;
+}
+
+void LegacyUpgradeTask::executeTask()
+{
+	setStatus(tr("Copying instance %1").arg(m_origInstance->name()));
+
+	FS::copy folderCopy(m_origInstance->instanceRoot(), m_stagingPath);
+	folderCopy.followSymlinks(true);
+
+	m_copyFuture = QtConcurrent::run(QThreadPool::globalInstance(), folderCopy);
+	connect(&m_copyFutureWatcher, &QFutureWatcher<bool>::finished, this, &LegacyUpgradeTask::copyFinished);
+	connect(&m_copyFutureWatcher, &QFutureWatcher<bool>::canceled, this, &LegacyUpgradeTask::copyAborted);
+	m_copyFutureWatcher.setFuture(m_copyFuture);
+}
+
+static QString decideVersion(const QString& currentVersion, const QString& intendedVersion)
+{
+	if(intendedVersion != currentVersion)
+	{
+		if(!intendedVersion.isEmpty())
+		{
+			return intendedVersion;
+		}
+		else if(!currentVersion.isEmpty())
+		{
+			return currentVersion;
+		}
+	}
+	else
+	{
+		if(!intendedVersion.isEmpty())
+		{
+			return intendedVersion;
+		}
+	}
+	return QString();
+}
+
+void LegacyUpgradeTask::copyFinished()
+{
+	auto successful = m_copyFuture.result();
+	if(!successful)
+	{
+		emitFailed(tr("Instance folder copy failed."));
+		return;
+	}
+	auto legacyInst = std::dynamic_pointer_cast<LegacyInstance>(m_origInstance);
+
+	auto instanceSettings = std::make_shared<INISettingsObject>(FS::PathCombine(m_stagingPath, "instance.cfg"));
+	instanceSettings->registerSetting("InstanceType", "Legacy");
+	instanceSettings->set("InstanceType", "OneSix");
+	// NOTE: this scope ensures the instance is fully saved before we emitSucceeded
+	{
+		MinecraftInstance inst(m_globalSettings, instanceSettings, m_stagingPath);
+		inst.setName(m_newName);
+		inst.init();
+
+		QString preferredVersionNumber = decideVersion(legacyInst->currentVersionId(), legacyInst->intendedVersionId());
+		if(preferredVersionNumber.isNull())
+		{
+			// try to decide version based on the jar(s?)
+			preferredVersionNumber = classparser::GetMinecraftJarVersion(legacyInst->baseJar());
+			if(preferredVersionNumber.isNull())
+			{
+				preferredVersionNumber = classparser::GetMinecraftJarVersion(legacyInst->runnableJar());
+				if(preferredVersionNumber.isNull())
+				{
+					emitFailed(tr("Could not decide Minecraft version."));
+					return;
+				}
+			}
+		}
+		auto components = inst.getComponentList();
+		components->buildingFromScratch();
+		components->setComponentVersion("net.minecraft", preferredVersionNumber, true);
+
+		if(legacyInst->shouldUseCustomBaseJar())
+		{
+			QString jarPath = legacyInst->customBaseJar();
+			qDebug() << "Base jar is custom! : " << jarPath;
+			// FIXME: handle case when the jar is unreadable?
+			// TODO: check the hash, if it's the same as the upstream jar, do not do this
+			components->installCustomJar(jarPath);
+		}
+
+		auto jarMods = legacyInst->getJarMods();
+		for(auto & jarMod: jarMods)
+		{
+			QString modPath = jarMod.filename().absoluteFilePath();
+			qDebug() << "jarMod: " << modPath;
+			components->installJarMods({modPath});
+		}
+
+		// remove all the extra garbage we no longer need
+		auto removeAll = [&](const QString &root, const QStringList &things)
+		{
+			for(auto &thing : things)
+			{
+				auto removePath = FS::PathCombine(root, thing);
+				QFileInfo stat(removePath);
+				if(stat.isDir())
+				{
+					FS::deletePath(removePath);
+				}
+				else
+				{
+					QFile::remove(removePath);
+				}
+			}
+		};
+		QStringList rootRemovables = {"modlist", "version", "instMods"};
+		QStringList mcRemovables = {"bin", "MultiMCLauncher.jar", "icon.png"};
+		removeAll(inst.instanceRoot(), rootRemovables);
+		removeAll(inst.minecraftRoot(), mcRemovables);
+	}
+	emitSucceeded();
+}
+
+void LegacyUpgradeTask::copyAborted()
+{
+	emitFailed(tr("Instance folder copy has been aborted."));
+	return;
+}
+