Add 'meshmc/' from commit 'fad6a1066616b69d7f5fef01178efdf014c59537'

git-subtree-dir: meshmc
git-subtree-mainline: 934382c8a1ce738589dee9ee0f14e1cec812770e
git-subtree-split: fad6a1066616b69d7f5fef01178efdf014c59537

4 files changed, 447 insertions, 0 deletions

diff --git a/meshmc/launcher/tasks/SequentialTask.cpp b/meshmc/launcher/tasks/SequentialTask.cpp
new file mode 100644
index 0000000000..12dcd92818
--- /dev/null
+++ b/meshmc/launcher/tasks/SequentialTask.cpp
@@ -0,0 +1,77 @@
+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "SequentialTask.h"
+
+SequentialTask::SequentialTask(QObject* parent)
+	: Task(parent), m_currentIndex(-1)
+{
+}
+
+void SequentialTask::addTask(Task::Ptr task)
+{
+	m_queue.append(task);
+}
+
+void SequentialTask::executeTask()
+{
+	m_currentIndex = -1;
+	startNext();
+}
+
+void SequentialTask::startNext()
+{
+	if (m_currentIndex != -1) {
+		Task::Ptr previous = m_queue[m_currentIndex];
+		disconnect(previous.get(), 0, this, 0);
+	}
+	m_currentIndex++;
+	if (m_queue.isEmpty() || m_currentIndex >= m_queue.size()) {
+		emitSucceeded();
+		return;
+	}
+	Task::Ptr next = m_queue[m_currentIndex];
+	connect(next.get(), SIGNAL(failed(QString)), this,
+			SLOT(subTaskFailed(QString)));
+	connect(next.get(), SIGNAL(status(QString)), this,
+			SLOT(subTaskStatus(QString)));
+	connect(next.get(), SIGNAL(progress(qint64, qint64)), this,
+			SLOT(subTaskProgress(qint64, qint64)));
+	connect(next.get(), SIGNAL(succeeded()), this, SLOT(startNext()));
+	next->start();
+}
+
+void SequentialTask::subTaskFailed(const QString& msg)
+{
+	emitFailed(msg);
+}
+void SequentialTask::subTaskStatus(const QString& msg)
+{
+	setStatus(msg);
+}
+void SequentialTask::subTaskProgress(qint64 current, qint64 total)
+{
+	if (total == 0) {
+		setProgress(0, 100);
+		return;
+	}
+	setProgress(current, total);
+}
diff --git a/meshmc/launcher/tasks/SequentialTask.h b/meshmc/launcher/tasks/SequentialTask.h
new file mode 100644
index 0000000000..ae2117cac2
--- /dev/null
+++ b/meshmc/launcher/tasks/SequentialTask.h
@@ -0,0 +1,50 @@
+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "Task.h"
+#include "QObjectPtr.h"
+
+#include <QQueue>
+
+class SequentialTask : public Task
+{
+	Q_OBJECT
+  public:
+	explicit SequentialTask(QObject* parent = 0);
+	virtual ~SequentialTask() {};
+
+	void addTask(Task::Ptr task);
+
+  protected:
+	void executeTask();
+
+  private slots:
+	void startNext();
+	void subTaskFailed(const QString& msg);
+	void subTaskStatus(const QString& msg);
+	void subTaskProgress(qint64 current, qint64 total);
+
+  private:
+	QQueue<Task::Ptr> m_queue;
+	int m_currentIndex;
+};
diff --git a/meshmc/launcher/tasks/Task.cpp b/meshmc/launcher/tasks/Task.cpp
new file mode 100644
index 0000000000..9f55b38699
--- /dev/null
+++ b/meshmc/launcher/tasks/Task.cpp
@@ -0,0 +1,189 @@
+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
+ * Copyright 2013-2021 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 "Task.h"
+
+#include <QDebug>
+#include <QPointer>
+
+Task::Task(QObject* parent) : QObject(parent) {}
+
+void Task::setStatus(const QString& new_status)
+{
+	if (m_status != new_status) {
+		m_status = new_status;
+		emit status(m_status);
+	}
+}
+
+void Task::setProgress(qint64 current, qint64 total)
+{
+	m_progress = current;
+	m_progressTotal = total;
+	emit progress(m_progress, m_progressTotal);
+}
+
+void Task::start()
+{
+	switch (m_state) {
+		case State::Inactive: {
+			qDebug() << "Task" << describe() << "starting for the first time";
+			break;
+		}
+		case State::AbortedByUser: {
+			qDebug() << "Task" << describe()
+					 << "restarting for after being aborted by user";
+			break;
+		}
+		case State::Failed: {
+			qDebug() << "Task" << describe()
+					 << "restarting for after failing at first";
+			break;
+		}
+		case State::Succeeded: {
+			qDebug() << "Task" << describe()
+					 << "restarting for after succeeding at first";
+			break;
+		}
+		case State::Running: {
+			qWarning() << "MeshMC tried to start task" << describe()
+					   << "while it was already running!";
+			return;
+		}
+	}
+	// NOTE: only fall thorugh to here in end states
+	m_state = State::Running;
+	emit started();
+	executeTask();
+}
+
+void Task::emitFailed(QString reason)
+{
+	// Don't fail twice.
+	if (!isRunning()) {
+		qCritical() << "Task" << describe()
+					<< "failed while not running!!!!: " << reason;
+		return;
+	}
+	m_state = State::Failed;
+	m_failReason = reason;
+	qCritical() << "Task" << describe() << "failed: " << reason;
+	QPointer<Task> guard(this);
+	emit failed(reason);
+	if (guard)
+		emit finished();
+}
+
+void Task::emitAborted()
+{
+	// Don't abort twice.
+	if (!isRunning()) {
+		qCritical() << "Task" << describe() << "aborted while not running!!!!";
+		return;
+	}
+	m_state = State::AbortedByUser;
+	m_failReason = "Aborted.";
+	qDebug() << "Task" << describe() << "aborted.";
+	QPointer<Task> guard(this);
+	emit failed(m_failReason);
+	if (guard)
+		emit finished();
+}
+
+void Task::emitSucceeded()
+{
+	// Don't succeed twice.
+	if (!isRunning()) {
+		qCritical() << "Task" << describe()
+					<< "succeeded while not running!!!!";
+		return;
+	}
+	m_state = State::Succeeded;
+	qDebug() << "Task" << describe() << "succeeded";
+	QPointer<Task> guard(this);
+	emit succeeded();
+	if (guard)
+		emit finished();
+}
+
+QString Task::describe()
+{
+	QString outStr;
+	QTextStream out(&outStr);
+	out << metaObject()->className() << QChar('(');
+	auto name = objectName();
+	if (name.isEmpty()) {
+		out << QString("0x%1").arg((quintptr)this, 0, 16);
+	} else {
+		out << name;
+	}
+	out << QChar(')');
+	out.flush();
+	return outStr;
+}
+
+bool Task::isRunning() const
+{
+	return m_state == State::Running;
+}
+
+bool Task::isFinished() const
+{
+	return m_state != State::Running && m_state != State::Inactive;
+}
+
+bool Task::wasSuccessful() const
+{
+	return m_state == State::Succeeded;
+}
+
+QString Task::failReason() const
+{
+	return m_failReason;
+}
+
+void Task::logWarning(const QString& line)
+{
+	qWarning() << line;
+	m_Warnings.append(line);
+}
+
+QStringList Task::warnings() const
+{
+	return m_Warnings;
+}
diff --git a/meshmc/launcher/tasks/Task.h b/meshmc/launcher/tasks/Task.h
new file mode 100644
index 0000000000..8019c9bd9c
--- /dev/null
+++ b/meshmc/launcher/tasks/Task.h
@@ -0,0 +1,131 @@
+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
+ * Copyright 2013-2021 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.
+ */
+
+#pragma once
+
+#include <QObject>
+#include <QString>
+#include <QStringList>
+
+#include "QObjectPtr.h"
+
+class Task : public QObject
+{
+	Q_OBJECT
+  public:
+	using Ptr = shared_qobject_ptr<Task>;
+
+	enum class State { Inactive, Running, Succeeded, Failed, AbortedByUser };
+
+  public:
+	explicit Task(QObject* parent = 0);
+	virtual ~Task() {};
+
+	bool isRunning() const;
+	bool isFinished() const;
+	bool wasSuccessful() const;
+
+	/*!
+	 * Returns the string that was passed to emitFailed as the error message
+	 * when the task failed. If the task hasn't failed, returns an empty string.
+	 */
+	QString failReason() const;
+
+	virtual QStringList warnings() const;
+
+	virtual bool canAbort() const
+	{
+		return false;
+	}
+
+	QString getStatus()
+	{
+		return m_status;
+	}
+
+	qint64 getProgress()
+	{
+		return m_progress;
+	}
+
+	qint64 getTotalProgress()
+	{
+		return m_progressTotal;
+	}
+
+  protected:
+	void logWarning(const QString& line);
+
+  private:
+	QString describe();
+
+  signals:
+	void started();
+	void progress(qint64 current, qint64 total);
+	void finished();
+	void succeeded();
+	void failed(QString reason);
+	void status(QString status);
+
+  public slots:
+	virtual void start();
+	virtual bool abort()
+	{
+		return false;
+	};
+
+  protected:
+	virtual void executeTask() = 0;
+
+  protected slots:
+	virtual void emitSucceeded();
+	virtual void emitAborted();
+	virtual void emitFailed(QString reason);
+
+  public slots:
+	void setStatus(const QString& status);
+	void setProgress(qint64 current, qint64 total);
+
+  private:
+	State m_state = State::Inactive;
+	QStringList m_Warnings;
+	QString m_failReason = "";
+	QString m_status;
+	int m_progress = 0;
+	int m_progressTotal = 100;
+};