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/* 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 "GoUpdate.h"
#include <QDebug>
#include <QDomDocument>
#include <QFile>
#include <FileSystem.h>
#include "net/Download.h"
#include "net/ChecksumValidator.h"
namespace GoUpdate
{
bool parseVersionInfo(const QByteArray& data, VersionFileList& list,
QString& error)
{
QJsonParseError jsonError;
QJsonDocument jsonDoc = QJsonDocument::fromJson(data, &jsonError);
if (jsonError.error != QJsonParseError::NoError) {
error = QString("Failed to parse version info JSON: %1 at %2")
.arg(jsonError.errorString())
.arg(jsonError.offset);
qCritical() << error;
return false;
}
QJsonObject json = jsonDoc.object();
qDebug() << data;
qDebug() << "Loading version info from JSON.";
QJsonArray filesArray = json.value("Files").toArray();
for (QJsonValue fileValue : filesArray) {
QJsonObject fileObj = fileValue.toObject();
QString file_path = fileObj.value("Path").toString();
VersionFileEntry file{
file_path,
fileObj.value("Perms").toVariant().toInt(),
FileSourceList(),
fileObj.value("MD5").toString(),
};
qDebug() << "File" << file.path << "with perms" << file.mode;
QJsonArray sourceArray = fileObj.value("Sources").toArray();
for (QJsonValue val : sourceArray) {
QJsonObject sourceObj = val.toObject();
QString type = sourceObj.value("SourceType").toString();
if (type == "http") {
file.sources.append(
FileSource("http", sourceObj.value("Url").toString()));
} else {
qWarning() << "Unknown source type" << type << "ignored.";
}
}
qDebug() << "Loaded info for" << file.path;
list.append(file);
}
return true;
}
bool processFileLists(const VersionFileList& currentVersion,
const VersionFileList& newVersion,
const QString& rootPath, const QString& tempPath,
NetJob::Ptr job, OperationList& ops)
{
// First, if we've loaded the current version's file list, we need to
// iterate through it and delete anything in the current one version's
// list that isn't in the new version's list.
for (VersionFileEntry entry : currentVersion) {
QFileInfo toDelete(FS::PathCombine(rootPath, entry.path));
if (!toDelete.exists()) {
qCritical() << "Expected file " << toDelete.absoluteFilePath()
<< " doesn't exist!";
}
bool keep = false;
//
for (VersionFileEntry newEntry : newVersion) {
if (newEntry.path == entry.path) {
qDebug()
<< "Not deleting" << entry.path
<< "because it is still present in the new version.";
keep = true;
break;
}
}
// If the loop reaches the end and we didn't find a match, delete
// the file.
if (!keep) {
if (toDelete.exists())
ops.append(Operation::DeleteOp(entry.path));
}
}
// Next, check each file in MeshMC's folder and see if we need to update
// them.
for (VersionFileEntry entry : newVersion) {
// TODO: Let's not MD5sum a ton of files on the GUI thread. We
// should probably find a way to do this in the background.
QString fileMD5;
QString realEntryPath = FS::PathCombine(rootPath, entry.path);
QFile entryFile(realEntryPath);
QFileInfo entryInfo(realEntryPath);
bool needs_upgrade = false;
if (!entryFile.exists()) {
needs_upgrade = true;
} else {
bool pass = true;
if (!entryInfo.isReadable()) {
qCritical()
<< "File " << realEntryPath << " is not readable.";
pass = false;
}
if (!entryInfo.isWritable()) {
qCritical()
<< "File " << realEntryPath << " is not writable.";
pass = false;
}
if (!entryFile.open(QFile::ReadOnly)) {
qCritical() << "File " << realEntryPath
<< " cannot be opened for reading.";
pass = false;
}
if (!pass) {
ops.clear();
return false;
}
}
if (!needs_upgrade) {
QCryptographicHash hash(QCryptographicHash::Md5);
auto foo = entryFile.readAll();
hash.addData(foo);
fileMD5 = hash.result().toHex();
if ((fileMD5 != entry.md5)) {
qDebug() << "MD5Sum does not match!";
qDebug() << "Expected:'" << entry.md5 << "'";
qDebug() << "Got: '" << fileMD5 << "'";
needs_upgrade = true;
}
}
// skip file. it doesn't need an upgrade.
if (!needs_upgrade) {
qDebug() << "File" << realEntryPath
<< " does not need updating.";
continue;
}
// yep. this file actually needs an upgrade. PROCEED.
qDebug() << "Found file" << realEntryPath
<< " that needs updating.";
// Go through the sources list and find one to use.
// TODO: Make a NetAction that takes a source list and tries each of
// them until one works. For now, we'll just use the first http one.
for (FileSource source : entry.sources) {
if (source.type != "http")
continue;
qDebug() << "Will download" << entry.path << "from"
<< source.url;
// Download it to updatedir/<filepath>-<md5> where filepath is
// the file's path with slashes replaced by underscores.
QString dlPath = FS::PathCombine(
tempPath, QString(entry.path).replace("/", "_"));
// We need to download the file to the updatefiles folder and
// add a task to copy it to its install path.
auto download = Net::Download::makeFile(source.url, dlPath);
auto rawMd5 = QByteArray::fromHex(entry.md5.toLatin1());
download->addValidator(new Net::ChecksumValidator(
QCryptographicHash::Md5, rawMd5));
job->addNetAction(download);
ops.append(Operation::CopyOp(dlPath, entry.path, entry.mode));
}
}
return true;
}
} // namespace GoUpdate
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