Add 'meshmc/' from commit 'fad6a1066616b69d7f5fef01178efdf014c59537'

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

1 files changed, 133 insertions, 0 deletions

diff --git a/meshmc/launcher/minecraft/update/AssetUpdateTask.cpp b/meshmc/launcher/minecraft/update/AssetUpdateTask.cpp
new file mode 100644
index 0000000000..e6b2574df8
--- /dev/null
+++ b/meshmc/launcher/minecraft/update/AssetUpdateTask.cpp
@@ -0,0 +1,133 @@
+/* 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 "AssetUpdateTask.h"
+
+#include "minecraft/MinecraftInstance.h"
+#include "minecraft/PackProfile.h"
+#include "net/ChecksumValidator.h"
+#include "minecraft/AssetsUtils.h"
+
+#include "Application.h"
+
+AssetUpdateTask::AssetUpdateTask(MinecraftInstance* inst)
+{
+	m_inst = inst;
+}
+
+AssetUpdateTask::~AssetUpdateTask() {}
+
+void AssetUpdateTask::executeTask()
+{
+	setStatus(tr("Updating assets index..."));
+	auto components = m_inst->getPackProfile();
+	auto profile = components->getProfile();
+	auto assets = profile->getMinecraftAssets();
+	QUrl indexUrl = assets->url;
+	QString localPath = assets->id + ".json";
+	auto job = new NetJob(tr("Asset index for %1").arg(m_inst->name()),
+						  APPLICATION->network());
+
+	auto metacache = APPLICATION->metacache();
+	auto entry = metacache->resolveEntry("asset_indexes", localPath);
+	entry->setStale(true);
+	auto hexSha1 = assets->sha1.toLatin1();
+	qDebug() << "Asset index SHA1:" << hexSha1;
+	auto dl = Net::Download::makeCached(indexUrl, entry);
+	auto rawSha1 = QByteArray::fromHex(assets->sha1.toLatin1());
+	dl->addValidator(
+		new Net::ChecksumValidator(QCryptographicHash::Sha1, rawSha1));
+	job->addNetAction(dl);
+
+	downloadJob.reset(job);
+
+	connect(downloadJob.get(), &NetJob::succeeded, this,
+			&AssetUpdateTask::assetIndexFinished);
+	connect(downloadJob.get(), &NetJob::failed, this,
+			&AssetUpdateTask::assetIndexFailed);
+	connect(downloadJob.get(), &NetJob::progress, this,
+			&AssetUpdateTask::progress);
+
+	qDebug() << m_inst->name() << ": Starting asset index download";
+	downloadJob->start();
+}
+
+bool AssetUpdateTask::canAbort() const
+{
+	return true;
+}
+
+void AssetUpdateTask::assetIndexFinished()
+{
+	AssetsIndex index;
+	qDebug() << m_inst->name() << ": Finished asset index download";
+
+	auto components = m_inst->getPackProfile();
+	auto profile = components->getProfile();
+	auto assets = profile->getMinecraftAssets();
+
+	QString asset_fname = "assets/indexes/" + assets->id + ".json";
+	// FIXME: this looks like a job for a generic validator based on json
+	// schema?
+	if (!AssetsUtils::loadAssetsIndexJson(assets->id, asset_fname, index)) {
+		auto metacache = APPLICATION->metacache();
+		auto entry =
+			metacache->resolveEntry("asset_indexes", assets->id + ".json");
+		metacache->evictEntry(entry);
+		emitFailed(tr("Failed to read the assets index!"));
+	}
+
+	auto job = index.getDownloadJob();
+	if (job) {
+		setStatus(tr("Getting the assets files from Mojang..."));
+		downloadJob = job;
+		connect(downloadJob.get(), &NetJob::succeeded, this,
+				&AssetUpdateTask::emitSucceeded);
+		connect(downloadJob.get(), &NetJob::failed, this,
+				&AssetUpdateTask::assetsFailed);
+		connect(downloadJob.get(), &NetJob::progress, this,
+				&AssetUpdateTask::progress);
+		downloadJob->start();
+		return;
+	}
+	emitSucceeded();
+}
+
+void AssetUpdateTask::assetIndexFailed(QString reason)
+{
+	qDebug() << m_inst->name() << ": Failed asset index download";
+	emitFailed(tr("Failed to download the assets index:\n%1").arg(reason));
+}
+
+void AssetUpdateTask::assetsFailed(QString reason)
+{
+	emitFailed(tr("Failed to download assets:\n%1").arg(reason));
+}
+
+bool AssetUpdateTask::abort()
+{
+	if (downloadJob) {
+		return downloadJob->abort();
+	} else {
+		qWarning() << "Prematurely aborted AssetUpdateTask";
+	}
+	return true;
+}