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/* Copyright 2013 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 "UpdateChecker.h"
#include "MultiMC.h"
#include "config.h"
#include "logger/QsLog.h"
#include <QJsonObject>
#include <QJsonArray>
#include <QJsonValue>
#define API_VERSION 0
#define CHANLIST_FORMAT 0
UpdateChecker::UpdateChecker()
{
m_currentChannel = VERSION_CHANNEL;
m_channelListUrl = CHANLIST_URL;
m_updateChecking = false;
m_chanListLoading = false;
m_checkUpdateWaiting = false;
m_chanListLoaded = false;
}
QList<UpdateChecker::ChannelListEntry> UpdateChecker::getChannelList() const
{
return m_channels;
}
bool UpdateChecker::hasChannels() const
{
return m_channels.isEmpty();
}
void UpdateChecker::checkForUpdate()
{
QLOG_DEBUG() << "Checking for updates.";
// If the channel list hasn't loaded yet, load it and defer checking for updates until later.
if (!m_chanListLoaded)
{
QLOG_DEBUG() << "Channel list isn't loaded yet. Loading channel list and deferring update check.";
m_checkUpdateWaiting = true;
updateChanList();
return;
}
if (m_updateChecking)
{
QLOG_DEBUG() << "Ignoring update check request. Already checking for updates.";
return;
}
m_updateChecking = true;
// Get the URL for the channel we're using.
// TODO: Allow user to select channels. For now, we'll just use the current channel.
QString updateChannel = m_currentChannel;
// Find the desired channel within the channel list and get its repo URL. If if cannot be found, error.
m_repoUrl = "";
for (ChannelListEntry entry : m_channels)
{
if (entry.id == updateChannel)
m_repoUrl = entry.url;
}
// If we didn't find our channel, error.
if (m_repoUrl.isEmpty())
{
emit updateCheckFailed();
return;
}
QUrl indexUrl = QUrl(m_repoUrl).resolved(QUrl("index.json"));
auto job = new NetJob("GoUpdate Repository Index");
job->addNetAction(ByteArrayDownload::make(indexUrl));
connect(job, SIGNAL(succeeded()), SLOT(updateCheckFinished()));
connect(job, SIGNAL(failed()), SLOT(updateCheckFailed()));
indexJob.reset(job);
job->start();
}
void UpdateChecker::updateCheckFinished()
{
QLOG_DEBUG() << "Finished downloading repo index. Checking for new versions.";
QJsonParseError jsonError;
QByteArray data;
{
ByteArrayDownloadPtr dl = std::dynamic_pointer_cast<ByteArrayDownload>(indexJob->first());
data = dl->m_data;
indexJob.reset();
}
QJsonDocument jsonDoc = QJsonDocument::fromJson(data, &jsonError);
if (jsonError.error != QJsonParseError::NoError || !jsonDoc.isObject())
{
QLOG_ERROR() << "Failed to parse GoUpdate repository index. JSON error" << jsonError.errorString() << "at offset" << jsonError.offset;
return;
}
QJsonObject object = jsonDoc.object();
bool success = false;
int apiVersion = object.value("ApiVersion").toVariant().toInt(&success);
if (apiVersion != API_VERSION || !success)
{
QLOG_ERROR() << "Failed to check for updates. API version mismatch. We're using" << API_VERSION << "server has" << apiVersion;
return;
}
QLOG_DEBUG() << "Processing repository version list.";
QJsonObject newestVersion;
QJsonArray versions = object.value("Versions").toArray();
for (QJsonValue versionVal : versions)
{
QJsonObject version = versionVal.toObject();
if (newestVersion.value("Id").toVariant().toInt() < version.value("Id").toVariant().toInt())
{
QLOG_DEBUG() << "Found newer version with ID" << version.value("Id").toVariant().toInt();
newestVersion = version;
}
}
// We've got the version with the greatest ID number. Now compare it to our current build number and update if they're different.
int newBuildNumber = newestVersion.value("Id").toVariant().toInt();
if (newBuildNumber != MMC->version().build)
{
// Update!
emit updateAvailable(m_repoUrl, newestVersion.value("Name").toVariant().toString(), newBuildNumber);
}
m_updateChecking = false;
}
void UpdateChecker::updateCheckFailed()
{
// TODO: log errors better
QLOG_ERROR() << "Update check failed for reasons unknown.";
}
void UpdateChecker::updateChanList()
{
QLOG_DEBUG() << "Loading the channel list.";
if (m_channelListUrl.isEmpty())
{
QLOG_ERROR() << "Failed to update channel list. No channel list URL set."
<< "If you'd like to use MultiMC's update system, please pass the channel list URL to CMake at compile time.";
return;
}
m_chanListLoading = true;
NetJob* job = new NetJob("Update System Channel List");
job->addNetAction(ByteArrayDownload::make(QUrl(m_channelListUrl)));
QObject::connect(job, &NetJob::succeeded, this, &UpdateChecker::chanListDownloadFinished);
QObject::connect(job, &NetJob::failed, this, &UpdateChecker::chanListDownloadFailed);
chanListJob.reset(job);
job->start();
}
void UpdateChecker::chanListDownloadFinished()
{
QByteArray data;
{
ByteArrayDownloadPtr dl = std::dynamic_pointer_cast<ByteArrayDownload>(chanListJob->first());
data = dl->m_data;
chanListJob.reset();
}
QJsonParseError jsonError;
QJsonDocument jsonDoc = QJsonDocument::fromJson(data, &jsonError);
if (jsonError.error != QJsonParseError::NoError)
{
// TODO: Report errors to the user.
QLOG_ERROR() << "Failed to parse channel list JSON:" << jsonError.errorString() << "at" << jsonError.offset;
return;
}
QJsonObject object = jsonDoc.object();
bool success = false;
int formatVersion = object.value("format_version").toVariant().toInt(&success);
if (formatVersion != CHANLIST_FORMAT || !success)
{
QLOG_ERROR() << "Failed to check for updates. Channel list format version mismatch. We're using" << CHANLIST_FORMAT << "server has" << formatVersion;
return;
}
// Load channels into a temporary array.
QList<ChannelListEntry> loadedChannels;
QJsonArray channelArray = object.value("channels").toArray();
for (QJsonValue chanVal : channelArray)
{
QJsonObject channelObj = chanVal.toObject();
ChannelListEntry entry{
channelObj.value("id").toVariant().toString(),
channelObj.value("name").toVariant().toString(),
channelObj.value("description").toVariant().toString(),
channelObj.value("url").toVariant().toString()
};
if (entry.id.isEmpty() || entry.name.isEmpty() || entry.url.isEmpty())
{
QLOG_ERROR() << "Channel list entry with empty ID, name, or URL. Skipping.";
continue;
}
loadedChannels.append(entry);
}
// Swap the channel list we just loaded into the object's channel list.
m_channels.swap(loadedChannels);
m_chanListLoading = false;
m_chanListLoaded = true;
QLOG_INFO() << "Successfully loaded UpdateChecker channel list.";
// If we're waiting to check for updates, do that now.
if (m_checkUpdateWaiting)
checkForUpdate();
emit channelListLoaded();
}
void UpdateChecker::chanListDownloadFailed()
{
m_chanListLoading = false;
QLOG_ERROR() << "Failed to download channel list.";
emit channelListLoaded();
}
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