NOISSUE implement LEgacy instance migration

1 files changed, 133 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..cb0572ed
--- /dev/null
+++ b/api/logic/minecraft/legacy/LegacyUpgradeTask.cpp
@@ -0,0 +1,133 @@
+#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/MinecraftProfile.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;
+		}
+	}
+	// TODO: possibly add fallback to the old jar/classfile analysis method from MultiMC4
+	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");
+	std::shared_ptr<MinecraftInstance> inst(new MinecraftInstance(m_globalSettings, instanceSettings, m_stagingPath));
+	inst->setName(m_newName);
+	inst->init();
+
+	QString preferredVersionNumber = decideVersion(legacyInst->currentVersionId(), legacyInst->intendedVersionId());
+	if(preferredVersionNumber.isNull())
+	{
+		// FIXME: let the user decide
+		emitFailed(tr("Could not decide Minecraft version."));
+		return;
+	}
+	inst->setComponentVersion("net.minecraft", preferredVersionNumber);
+
+	// BUG: reloadProfile should not be necessary, but setComponentVersion voids the profile created by init()!
+	inst->reloadProfile();
+	auto profile = inst->getMinecraftProfile();
+
+	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
+		profile->installCustomJar(jarPath);
+	}
+
+	auto jarMods = legacyInst->getJarMods();
+	for(auto & jarMod: jarMods)
+	{
+		QString modPath = jarMod.filename().absoluteFilePath();
+		qDebug() << "jarMod: " << modPath;
+		profile->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;
+}
+