Add 'meshmc/' from commit 'fad6a1066616b69d7f5fef01178efdf014c59537'

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

1 files changed, 225 insertions, 0 deletions

diff --git a/meshmc/launcher/net/NetJob.cpp b/meshmc/launcher/net/NetJob.cpp
new file mode 100644
index 0000000000..7b3eff6620
--- /dev/null
+++ b/meshmc/launcher/net/NetJob.cpp
@@ -0,0 +1,225 @@
+/* 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 "NetJob.h"
+#include "Download.h"
+
+#include <QDebug>
+
+void NetJob::partSucceeded(int index)
+{
+	// do progress. all slots are 1 in size at least
+	auto& slot = parts_progress[index];
+	partProgress(index, slot.total_progress, slot.total_progress);
+
+	m_doing.remove(index);
+	m_done.insert(index);
+	downloads[index].get()->disconnect(this);
+	startMoreParts();
+}
+
+void NetJob::partFailed(int index)
+{
+	m_doing.remove(index);
+	auto& slot = parts_progress[index];
+	if (slot.failures == 3) {
+		m_failed.insert(index);
+	} else {
+		slot.failures++;
+		m_todo.enqueue(index);
+	}
+	downloads[index].get()->disconnect(this);
+	startMoreParts();
+}
+
+void NetJob::partAborted(int index)
+{
+	m_aborted = true;
+	m_doing.remove(index);
+	m_failed.insert(index);
+	downloads[index].get()->disconnect(this);
+	startMoreParts();
+}
+
+void NetJob::partProgress(int index, qint64 bytesReceived, qint64 bytesTotal)
+{
+	auto& slot = parts_progress[index];
+	slot.current_progress = bytesReceived;
+	slot.total_progress = bytesTotal;
+
+	int done = m_done.size();
+	int doing = m_doing.size();
+	int all = parts_progress.size();
+
+	qint64 bytesAll = 0;
+	qint64 bytesTotalAll = 0;
+	for (auto& partIdx : m_doing) {
+		auto part = parts_progress[partIdx];
+		// do not count parts with unknown/nonsensical total size
+		if (part.total_progress <= 0) {
+			continue;
+		}
+		bytesAll += part.current_progress;
+		bytesTotalAll += part.total_progress;
+	}
+
+	qint64 inprogress =
+		(bytesTotalAll == 0) ? 0 : (bytesAll * 1000) / bytesTotalAll;
+	auto current = done * 1000 + doing * inprogress;
+	auto current_total = all * 1000;
+	// HACK: make sure it never jumps backwards.
+	// FAIL: This breaks if the size is not known (or is it something else?) and
+	// jumps to 1000, so if it is 1000 reset it to inprogress
+	if (m_current_progress == 1000) {
+		m_current_progress = inprogress;
+	}
+	if (m_current_progress > current) {
+		current = m_current_progress;
+	}
+	m_current_progress = current;
+	setProgress(current, current_total);
+}
+
+void NetJob::executeTask()
+{
+	// hack that delays early failures so they can be caught easier
+	QMetaObject::invokeMethod(this, "startMoreParts", Qt::QueuedConnection);
+}
+
+void NetJob::startMoreParts()
+{
+	if (!isRunning()) {
+		// this actually makes sense. You can put running downloads into a
+		// NetJob and then not start it until much later.
+		return;
+	}
+	// OK. We are actively processing tasks, proceed.
+	// Check for final conditions if there's nothing in the queue.
+	if (!m_todo.size()) {
+		if (!m_doing.size()) {
+			if (!m_failed.size()) {
+				emitSucceeded();
+			} else if (m_aborted) {
+				emitAborted();
+			} else {
+				emitFailed(tr("Job '%1' failed to process:\n%2")
+							   .arg(objectName())
+							   .arg(getFailedFiles().join("\n")));
+			}
+		}
+		return;
+	}
+	// There's work to do, try to start more parts.
+	while (m_doing.size() < 6) {
+		if (!m_todo.size())
+			return;
+		int doThis = m_todo.dequeue();
+		m_doing.insert(doThis);
+		auto part = downloads[doThis];
+		// connect signals :D
+		connect(part.get(), SIGNAL(succeeded(int)), SLOT(partSucceeded(int)));
+		connect(part.get(), SIGNAL(failed(int)), SLOT(partFailed(int)));
+		connect(part.get(), SIGNAL(aborted(int)), SLOT(partAborted(int)));
+		connect(part.get(), SIGNAL(netActionProgress(int, qint64, qint64)),
+				SLOT(partProgress(int, qint64, qint64)));
+		part->start(m_network);
+	}
+}
+
+QStringList NetJob::getFailedFiles()
+{
+	QStringList failed;
+	for (auto index : m_failed) {
+		failed.push_back(downloads[index]->url().toString());
+	}
+	failed.sort();
+	return failed;
+}
+
+bool NetJob::canAbort() const
+{
+	bool canFullyAbort = true;
+	// can abort the waiting?
+	for (auto index : m_todo) {
+		auto part = downloads[index];
+		canFullyAbort &= part->canAbort();
+	}
+	// can abort the active?
+	for (auto index : m_doing) {
+		auto part = downloads[index];
+		canFullyAbort &= part->canAbort();
+	}
+	return canFullyAbort;
+}
+
+bool NetJob::abort()
+{
+	bool fullyAborted = true;
+	// fail all waiting
+	m_failed.unite(QSet<int>(m_todo.begin(), m_todo.end()));
+	m_todo.clear();
+	// abort active
+	auto toKill = m_doing.values();
+	for (auto index : toKill) {
+		auto part = downloads[index];
+		fullyAborted &= part->abort();
+	}
+	return fullyAborted;
+}
+
+bool NetJob::addNetAction(NetAction::Ptr action)
+{
+	action->m_index_within_job = downloads.size();
+	downloads.append(action);
+	part_info pi;
+	parts_progress.append(pi);
+	partProgress(parts_progress.count() - 1, action->currentProgress(),
+				 action->totalProgress());
+
+	if (action->isRunning()) {
+		connect(action.get(), SIGNAL(succeeded(int)), SLOT(partSucceeded(int)));
+		connect(action.get(), SIGNAL(failed(int)), SLOT(partFailed(int)));
+		connect(action.get(), SIGNAL(netActionProgress(int, qint64, qint64)),
+				SLOT(partProgress(int, qint64, qint64)));
+	} else {
+		m_todo.append(parts_progress.size() - 1);
+	}
+	return true;
+}
+
+NetJob::~NetJob() = default;