sneedmc/launcher/updater/UpdateChecker.cpp

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/* Copyright 2013-2021 MultiMC Contributors
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*
* 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 <QJsonObject>
#include <QJsonArray>
#include <QJsonValue>
#include <QDebug>
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#define API_VERSION 0
#define CHANLIST_FORMAT 0
#include "BuildConfig.h"
#include "sys.h"
UpdateChecker::UpdateChecker(QString channelUrl, QString currentChannel, int currentBuild)
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{
m_channelUrl = channelUrl;
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m_currentChannel = currentChannel;
m_currentBuild = currentBuild;
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}
QList<UpdateChecker::ChannelListEntry> UpdateChecker::getChannelList() const
{
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return m_channels;
}
bool UpdateChecker::hasChannels() const
{
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return !m_channels.isEmpty();
}
void UpdateChecker::checkForUpdate(QString updateChannel, bool notifyNoUpdate)
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{
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qDebug() << "Checking for updates.";
// If the channel list hasn't loaded yet, load it and defer checking for updates until
// later.
if (!m_chanListLoaded)
{
qDebug() << "Channel list isn't loaded yet. Loading channel list and deferring update check.";
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m_checkUpdateWaiting = true;
m_deferredUpdateChannel = updateChannel;
updateChanList(notifyNoUpdate);
return;
}
if (m_updateChecking)
{
qDebug() << "Ignoring update check request. Already checking for updates.";
return;
}
// Find the desired channel within the channel list and get its repo URL. If if cannot be
// found, error.
QString stableUrl;
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m_newRepoUrl = "";
for (ChannelListEntry entry : m_channels)
{
qDebug() << "channelEntry = " << entry.id;
if(entry.id == "stable") {
stableUrl = entry.url;
}
if (entry.id == updateChannel) {
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m_newRepoUrl = entry.url;
qDebug() << "is intended update channel: " << entry.id;
}
if (entry.id == m_currentChannel) {
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m_currentRepoUrl = entry.url;
qDebug() << "is current update channel: " << entry.id;
}
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}
qDebug() << "m_repoUrl = " << m_newRepoUrl;
if (m_newRepoUrl.isEmpty()) {
qWarning() << "m_repoUrl was empty. defaulting to 'stable': " << stableUrl;
m_newRepoUrl = stableUrl;
}
// If nothing applies, error
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if (m_newRepoUrl.isEmpty())
{
qCritical() << "failed to select any update repository for: " << updateChannel;
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emit updateCheckFailed();
return;
}
m_updateChecking = true;
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QUrl indexUrl = QUrl(m_newRepoUrl).resolved(QUrl("index.json"));
auto job = new NetJob("GoUpdate Repository Index");
job->addNetAction(Net::Download::makeByteArray(indexUrl, &indexData));
connect(job, &NetJob::succeeded, [this, notifyNoUpdate](){ updateCheckFinished(notifyNoUpdate); });
connect(job, &NetJob::failed, this, &UpdateChecker::updateCheckFailed);
indexJob.reset(job);
job->start();
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}
void UpdateChecker::updateCheckFinished(bool notifyNoUpdate)
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{
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qDebug() << "Finished downloading repo index. Checking for new versions.";
QJsonParseError jsonError;
indexJob.reset();
QJsonDocument jsonDoc = QJsonDocument::fromJson(indexData, &jsonError);
indexData.clear();
if (jsonError.error != QJsonParseError::NoError || !jsonDoc.isObject())
{
qCritical() << "Failed to parse GoUpdate repository index. JSON error"
<< jsonError.errorString() << "at offset" << jsonError.offset;
m_updateChecking = false;
return;
}
QJsonObject object = jsonDoc.object();
bool success = false;
int apiVersion = object.value("ApiVersion").toVariant().toInt(&success);
if (apiVersion != API_VERSION || !success)
{
qCritical() << "Failed to check for updates. API version mismatch. We're using"
<< API_VERSION << "server has" << apiVersion;
m_updateChecking = false;
return;
}
qDebug() << "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())
{
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 != m_currentBuild)
{
qDebug() << "Found newer version with ID" << newBuildNumber;
// Update!
GoUpdate::Status updateStatus;
updateStatus.updateAvailable = true;
updateStatus.currentVersionId = m_currentBuild;
updateStatus.currentRepoUrl = m_currentRepoUrl;
updateStatus.newVersionId = newBuildNumber;
updateStatus.newRepoUrl = m_newRepoUrl;
emit updateAvailable(updateStatus);
}
else if (notifyNoUpdate)
{
emit noUpdateFound();
}
m_updateChecking = false;
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}
void UpdateChecker::updateCheckFailed()
{
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qCritical() << "Update check failed for reasons unknown.";
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}
void UpdateChecker::updateChanList(bool notifyNoUpdate)
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{
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qDebug() << "Loading the channel list.";
if (m_chanListLoading)
{
qDebug() << "Ignoring channel list update request. Already grabbing channel list.";
return;
}
m_chanListLoading = true;
NetJob *job = new NetJob("Update System Channel List");
job->addNetAction(Net::Download::makeByteArray(QUrl(m_channelUrl), &chanlistData));
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connect(job, &NetJob::succeeded, [this, notifyNoUpdate]() { chanListDownloadFinished(notifyNoUpdate); });
QObject::connect(job, &NetJob::failed, this, &UpdateChecker::chanListDownloadFailed);
chanListJob.reset(job);
job->start();
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}
void UpdateChecker::chanListDownloadFinished(bool notifyNoUpdate)
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{
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chanListJob.reset();
QJsonParseError jsonError;
QJsonDocument jsonDoc = QJsonDocument::fromJson(chanlistData, &jsonError);
chanlistData.clear();
if (jsonError.error != QJsonParseError::NoError)
{
// TODO: Report errors to the user.
qCritical() << "Failed to parse channel list JSON:" << jsonError.errorString() << "at" << jsonError.offset;
m_chanListLoading = false;
return;
}
QJsonObject object = jsonDoc.object();
bool success = false;
int formatVersion = object.value("format_version").toVariant().toInt(&success);
if (formatVersion != CHANLIST_FORMAT || !success)
{
qCritical()
<< "Failed to check for updates. Channel list format version mismatch. We're using"
<< CHANLIST_FORMAT << "server has" << formatVersion;
m_chanListLoading = false;
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())
{
qCritical() << "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;
qDebug() << "Successfully loaded UpdateChecker channel list.";
// If we're waiting to check for updates, do that now.
if (m_checkUpdateWaiting)
checkForUpdate(m_deferredUpdateChannel, notifyNoUpdate);
emit channelListLoaded();
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}
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void UpdateChecker::chanListDownloadFailed(QString reason)
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{
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m_chanListLoading = false;
qCritical() << QString("Failed to download channel list: %1").arg(reason);
emit channelListLoaded();
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}