pollymc/api/logic/updater/UpdateChecker.cpp

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/* Copyright 2013-2015 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
UpdateChecker::UpdateChecker(QString channelListUrl, QString currentChannel, int currentBuild)
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{
m_channelListUrl = channelListUrl;
m_currentChannel = currentChannel;
m_currentBuild = currentBuild;
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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(QString updateChannel, bool notifyNoUpdate)
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{
qDebug() << "Checking for updates.";
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// If the channel list hasn't loaded yet, load it and defer checking for updates until
// later.
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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);
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return;
}
if (m_updateChecking)
{
qDebug() << "Ignoring update check request. Already checking for updates.";
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return;
}
m_updateChecking = true;
// Find the desired channel within the channel list and get its repo URL. If if cannot be
// found, error.
m_newRepoUrl = "";
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for (ChannelListEntry entry : m_channels)
{
if (entry.id == updateChannel)
m_newRepoUrl = entry.url;
if (entry.id == m_currentChannel)
m_currentRepoUrl = entry.url;
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}
qDebug() << "m_repoUrl = " << m_newRepoUrl;
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// If we didn't find our channel, error.
if (m_newRepoUrl.isEmpty())
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{
qCritical() << "m_repoUrl is empty!";
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emit updateCheckFailed();
return;
}
QUrl indexUrl = QUrl(m_newRepoUrl).resolved(QUrl("index.json"));
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auto job = new NetJob("GoUpdate Repository Index");
job->addNetAction(ByteArrayDownload::make(indexUrl));
connect(job, &NetJob::succeeded, [this, notifyNoUpdate]()
{ updateCheckFinished(notifyNoUpdate); });
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connect(job, &NetJob::failed, this, &UpdateChecker::updateCheckFailed);
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indexJob.reset(job);
job->start();
}
void UpdateChecker::updateCheckFinished(bool notifyNoUpdate)
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{
qDebug() << "Finished downloading repo index. Checking for new versions.";
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QJsonParseError jsonError;
QByteArray data;
{
ByteArrayDownloadPtr dl =
std::dynamic_pointer_cast<ByteArrayDownload>(indexJob->first());
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data = dl->m_data;
indexJob.reset();
}
QJsonDocument jsonDoc = QJsonDocument::fromJson(data, &jsonError);
if (jsonError.error != QJsonParseError::NoError || !jsonDoc.isObject())
{
qCritical() << "Failed to parse GoUpdate repository index. JSON error"
<< jsonError.errorString() << "at offset" << jsonError.offset;
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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;
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return;
}
qDebug() << "Processing repository version list.";
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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())
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{
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.
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int newBuildNumber = newestVersion.value("Id").toVariant().toInt();
if (newBuildNumber != m_currentBuild)
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{
qDebug() << "Found newer version with ID" << newBuildNumber;
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// 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();
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}
m_updateChecking = false;
}
void UpdateChecker::updateCheckFailed()
{
qCritical() << "Update check failed for reasons unknown.";
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}
void UpdateChecker::updateChanList(bool notifyNoUpdate)
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{
qDebug() << "Loading the channel list.";
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if (m_channelListUrl.isEmpty())
{
qCritical() << "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.";
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return;
}
m_chanListLoading = true;
NetJob *job = new NetJob("Update System Channel List");
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job->addNetAction(ByteArrayDownload::make(QUrl(m_channelListUrl)));
connect(job, &NetJob::succeeded, [this, notifyNoUpdate]()
{ chanListDownloadFinished(notifyNoUpdate); });
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QObject::connect(job, &NetJob::failed, this, &UpdateChecker::chanListDownloadFailed);
chanListJob.reset(job);
job->start();
}
void UpdateChecker::chanListDownloadFinished(bool notifyNoUpdate)
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{
QByteArray data;
{
ByteArrayDownloadPtr dl =
std::dynamic_pointer_cast<ByteArrayDownload>(chanListJob->first());
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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.
qCritical() << "Failed to parse channel list JSON:" << jsonError.errorString() << "at"
<< jsonError.offset;
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return;
}
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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;
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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()};
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if (entry.id.isEmpty() || entry.name.isEmpty() || entry.url.isEmpty())
{
qCritical() << "Channel list entry with empty ID, name, or URL. Skipping.";
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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.";
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// 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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{
m_chanListLoading = false;
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qCritical() << QString("Failed to download channel list: %1").arg(reason);
emit channelListLoaded();
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}