Add 'meshmc/' from commit 'fad6a1066616b69d7f5fef01178efdf014c59537'

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

1 files changed, 387 insertions, 0 deletions

diff --git a/meshmc/launcher/minecraft/MojangVersionFormat.cpp b/meshmc/launcher/minecraft/MojangVersionFormat.cpp
new file mode 100644
index 0000000000..0943da3e56
--- /dev/null
+++ b/meshmc/launcher/minecraft/MojangVersionFormat.cpp
@@ -0,0 +1,387 @@
+/* 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 "MojangVersionFormat.h"
+#include "OneSixVersionFormat.h"
+#include "MojangDownloadInfo.h"
+
+#include "Json.h"
+using namespace Json;
+#include "ParseUtils.h"
+#include <BuildConfig.h>
+
+static const int CURRENT_MINIMUM_MESHMC_VERSION = 18;
+
+static MojangAssetIndexInfo::Ptr assetIndexFromJson(const QJsonObject& obj);
+static MojangDownloadInfo::Ptr downloadInfoFromJson(const QJsonObject& obj);
+static MojangLibraryDownloadInfo::Ptr
+libDownloadInfoFromJson(const QJsonObject& libObj);
+static QJsonObject assetIndexToJson(MojangAssetIndexInfo::Ptr assetidxinfo);
+static QJsonObject
+libDownloadInfoToJson(MojangLibraryDownloadInfo::Ptr libinfo);
+static QJsonObject downloadInfoToJson(MojangDownloadInfo::Ptr info);
+
+namespace Bits
+{
+	static void readString(const QJsonObject& root, const QString& key,
+						   QString& variable)
+	{
+		if (root.contains(key)) {
+			variable = requireString(root.value(key));
+		}
+	}
+
+	static void readDownloadInfo(MojangDownloadInfo::Ptr out,
+								 const QJsonObject& obj)
+	{
+		// optional, not used
+		readString(obj, "path", out->path);
+		// required!
+		out->sha1 = requireString(obj, "sha1");
+		out->url = requireString(obj, "url");
+		out->size = requireInteger(obj, "size");
+	}
+
+	static void readAssetIndex(MojangAssetIndexInfo::Ptr out,
+							   const QJsonObject& obj)
+	{
+		out->totalSize = requireInteger(obj, "totalSize");
+		out->id = requireString(obj, "id");
+		// out->known = true;
+	}
+} // namespace Bits
+
+MojangDownloadInfo::Ptr downloadInfoFromJson(const QJsonObject& obj)
+{
+	auto out = std::make_shared<MojangDownloadInfo>();
+	Bits::readDownloadInfo(out, obj);
+	return out;
+}
+
+MojangAssetIndexInfo::Ptr assetIndexFromJson(const QJsonObject& obj)
+{
+	auto out = std::make_shared<MojangAssetIndexInfo>();
+	Bits::readDownloadInfo(out, obj);
+	Bits::readAssetIndex(out, obj);
+	return out;
+}
+
+QJsonObject downloadInfoToJson(MojangDownloadInfo::Ptr info)
+{
+	QJsonObject out;
+	if (!info->path.isNull()) {
+		out.insert("path", info->path);
+	}
+	out.insert("sha1", info->sha1);
+	out.insert("size", info->size);
+	out.insert("url", info->url);
+	return out;
+}
+
+MojangLibraryDownloadInfo::Ptr
+libDownloadInfoFromJson(const QJsonObject& libObj)
+{
+	auto out = std::make_shared<MojangLibraryDownloadInfo>();
+	auto dlObj = requireObject(libObj.value("downloads"));
+	if (dlObj.contains("artifact")) {
+		out->artifact = downloadInfoFromJson(requireObject(dlObj, "artifact"));
+	}
+	if (dlObj.contains("classifiers")) {
+		auto classifiersObj = requireObject(dlObj, "classifiers");
+		for (auto iter = classifiersObj.begin(); iter != classifiersObj.end();
+			 iter++) {
+			auto classifier = iter.key();
+			auto classifierObj = requireObject(iter.value());
+			out->classifiers[classifier] = downloadInfoFromJson(classifierObj);
+		}
+	}
+	return out;
+}
+
+QJsonObject libDownloadInfoToJson(MojangLibraryDownloadInfo::Ptr libinfo)
+{
+	QJsonObject out;
+	if (libinfo->artifact) {
+		out.insert("artifact", downloadInfoToJson(libinfo->artifact));
+	}
+	if (libinfo->classifiers.size()) {
+		QJsonObject classifiersOut;
+		for (auto iter = libinfo->classifiers.begin();
+			 iter != libinfo->classifiers.end(); iter++) {
+			classifiersOut.insert(iter.key(), downloadInfoToJson(iter.value()));
+		}
+		out.insert("classifiers", classifiersOut);
+	}
+	return out;
+}
+
+QJsonObject assetIndexToJson(MojangAssetIndexInfo::Ptr info)
+{
+	QJsonObject out;
+	if (!info->path.isNull()) {
+		out.insert("path", info->path);
+	}
+	out.insert("sha1", info->sha1);
+	out.insert("size", info->size);
+	out.insert("url", info->url);
+	out.insert("totalSize", info->totalSize);
+	out.insert("id", info->id);
+	return out;
+}
+
+void MojangVersionFormat::readVersionProperties(const QJsonObject& in,
+												VersionFile* out)
+{
+	Bits::readString(in, "id", out->minecraftVersion);
+	Bits::readString(in, "mainClass", out->mainClass);
+	Bits::readString(in, "minecraftArguments", out->minecraftArguments);
+	if (out->minecraftArguments.isEmpty()) {
+		QString processArguments;
+		Bits::readString(in, "processArguments", processArguments);
+		QString toCompare = processArguments.toLower();
+		if (toCompare == "legacy") {
+			out->minecraftArguments = " ${auth_player_name} ${auth_session}";
+		} else if (toCompare == "username_session") {
+			out->minecraftArguments =
+				"--username ${auth_player_name} --session ${auth_session}";
+		} else if (toCompare == "username_session_version") {
+			out->minecraftArguments =
+				"--username ${auth_player_name} --session ${auth_session} "
+				"--version ${profile_name}";
+		} else if (!toCompare.isEmpty()) {
+			out->addProblem(
+				ProblemSeverity::Error,
+				QObject::tr("processArguments is set to unknown value '%1'")
+					.arg(processArguments));
+		}
+	}
+	Bits::readString(in, "type", out->type);
+
+	Bits::readString(in, "assets", out->assets);
+	if (in.contains("assetIndex")) {
+		out->mojangAssetIndex =
+			assetIndexFromJson(requireObject(in, "assetIndex"));
+	} else if (!out->assets.isNull()) {
+		out->mojangAssetIndex =
+			std::make_shared<MojangAssetIndexInfo>(out->assets);
+	}
+
+	out->releaseTime = timeFromS3Time(in.value("releaseTime").toString(""));
+	out->updateTime = timeFromS3Time(in.value("time").toString(""));
+
+	if (in.contains("minimumLauncherVersion")) {
+		out->minimumMeshMCVersion =
+			requireInteger(in.value("minimumLauncherVersion"));
+		if (out->minimumMeshMCVersion > CURRENT_MINIMUM_MESHMC_VERSION) {
+			out->addProblem(
+				ProblemSeverity::Warning,
+				QObject::tr("The 'minimumMeshMCVersion' value of this version "
+							"(%1) is higher than supported by %3 (%2). It "
+							"might not work properly!")
+					.arg(out->minimumMeshMCVersion)
+					.arg(CURRENT_MINIMUM_MESHMC_VERSION)
+					.arg(BuildConfig.MESHMC_NAME));
+		}
+	}
+	if (in.contains("downloads")) {
+		auto downloadsObj = requireObject(in, "downloads");
+		for (auto iter = downloadsObj.begin(); iter != downloadsObj.end();
+			 iter++) {
+			auto classifier = iter.key();
+			auto classifierObj = requireObject(iter.value());
+			out->mojangDownloads[classifier] =
+				downloadInfoFromJson(classifierObj);
+		}
+	}
+}
+
+VersionFilePtr
+MojangVersionFormat::versionFileFromJson(const QJsonDocument& doc,
+										 const QString& filename)
+{
+	VersionFilePtr out(new VersionFile());
+	if (doc.isEmpty() || doc.isNull()) {
+		throw JSONValidationError(filename + " is empty or null");
+	}
+	if (!doc.isObject()) {
+		throw JSONValidationError(filename + " is not an object");
+	}
+
+	QJsonObject root = doc.object();
+
+	readVersionProperties(root, out.get());
+
+	out->name = "Minecraft";
+	out->uid = "net.minecraft";
+	out->version = out->minecraftVersion;
+	// out->filename = filename;
+
+	if (root.contains("libraries")) {
+		for (auto libVal : requireArray(root.value("libraries"))) {
+			auto libObj = requireObject(libVal);
+
+			auto lib =
+				MojangVersionFormat::libraryFromJson(*out, libObj, filename);
+			out->libraries.append(lib);
+		}
+	}
+	return out;
+}
+
+void MojangVersionFormat::writeVersionProperties(const VersionFile* in,
+												 QJsonObject& out)
+{
+	writeString(out, "id", in->minecraftVersion);
+	writeString(out, "mainClass", in->mainClass);
+	writeString(out, "minecraftArguments", in->minecraftArguments);
+	writeString(out, "type", in->type);
+	if (!in->releaseTime.isNull()) {
+		writeString(out, "releaseTime", timeToS3Time(in->releaseTime));
+	}
+	if (!in->updateTime.isNull()) {
+		writeString(out, "time", timeToS3Time(in->updateTime));
+	}
+	if (in->minimumMeshMCVersion != -1) {
+		out.insert("minimumLauncherVersion", in->minimumMeshMCVersion);
+	}
+	writeString(out, "assets", in->assets);
+	if (in->mojangAssetIndex && in->mojangAssetIndex->known) {
+		out.insert("assetIndex", assetIndexToJson(in->mojangAssetIndex));
+	}
+	if (in->mojangDownloads.size()) {
+		QJsonObject downloadsOut;
+		for (auto iter = in->mojangDownloads.begin();
+			 iter != in->mojangDownloads.end(); iter++) {
+			downloadsOut.insert(iter.key(), downloadInfoToJson(iter.value()));
+		}
+		out.insert("downloads", downloadsOut);
+	}
+}
+
+QJsonDocument
+MojangVersionFormat::versionFileToJson(const VersionFilePtr& patch)
+{
+	QJsonObject root;
+	writeVersionProperties(patch.get(), root);
+	if (!patch->libraries.isEmpty()) {
+		QJsonArray array;
+		for (auto value : patch->libraries) {
+			array.append(MojangVersionFormat::libraryToJson(value.get()));
+		}
+		root.insert("libraries", array);
+	}
+
+	// write the contents to a json document.
+	{
+		QJsonDocument out;
+		out.setObject(root);
+		return out;
+	}
+}
+
+LibraryPtr MojangVersionFormat::libraryFromJson(ProblemContainer& problems,
+												const QJsonObject& libObj,
+												const QString& filename)
+{
+	LibraryPtr out(new Library());
+	if (!libObj.contains("name")) {
+		throw JSONValidationError(
+			filename + "contains a library that doesn't have a 'name' field");
+	}
+	auto rawName = libObj.value("name").toString();
+	out->m_name = rawName;
+	if (!out->m_name.valid()) {
+		problems.addProblem(
+			ProblemSeverity::Error,
+			QObject::tr("Library %1 name is broken and cannot be processed.")
+				.arg(rawName));
+	}
+
+	Bits::readString(libObj, "url", out->m_repositoryURL);
+	if (libObj.contains("extract")) {
+		out->m_hasExcludes = true;
+		auto extractObj = requireObject(libObj.value("extract"));
+		for (auto excludeVal : requireArray(extractObj.value("exclude"))) {
+			out->m_extractExcludes.append(requireString(excludeVal));
+		}
+	}
+	if (libObj.contains("natives")) {
+		QJsonObject nativesObj = requireObject(libObj.value("natives"));
+		for (auto it = nativesObj.begin(); it != nativesObj.end(); ++it) {
+			if (!it.value().isString()) {
+				qWarning() << filename
+						   << "contains an invalid native (skipping)";
+			}
+			OpSys opSys = OpSys_fromString(it.key());
+			if (opSys != Os_Other) {
+				out->m_nativeClassifiers[opSys] = it.value().toString();
+			}
+		}
+	}
+	if (libObj.contains("rules")) {
+		out->applyRules = true;
+		out->m_rules = rulesFromJsonV4(libObj);
+	}
+	if (libObj.contains("downloads")) {
+		out->m_mojangDownloads = libDownloadInfoFromJson(libObj);
+	}
+	return out;
+}
+
+QJsonObject MojangVersionFormat::libraryToJson(Library* library)
+{
+	QJsonObject libRoot;
+	libRoot.insert("name", library->m_name.serialize());
+	if (!library->m_repositoryURL.isEmpty()) {
+		libRoot.insert("url", library->m_repositoryURL);
+	}
+	if (library->isNative()) {
+		QJsonObject nativeList;
+		auto iter = library->m_nativeClassifiers.begin();
+		while (iter != library->m_nativeClassifiers.end()) {
+			nativeList.insert(OpSys_toString(iter.key()), iter.value());
+			iter++;
+		}
+		libRoot.insert("natives", nativeList);
+		if (library->m_extractExcludes.size()) {
+			QJsonArray excludes;
+			QJsonObject extract;
+			for (auto exclude : library->m_extractExcludes) {
+				excludes.append(exclude);
+			}
+			extract.insert("exclude", excludes);
+			libRoot.insert("extract", extract);
+		}
+	}
+	if (library->m_rules.size()) {
+		QJsonArray allRules;
+		for (auto& rule : library->m_rules) {
+			QJsonObject ruleObj = rule->toJson();
+			allRules.append(ruleObj);
+		}
+		libRoot.insert("rules", allRules);
+	}
+	if (library->m_mojangDownloads) {
+		auto downloadsObj = libDownloadInfoToJson(library->m_mojangDownloads);
+		libRoot.insert("downloads", downloadsObj);
+	}
+	return libRoot;
+}