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authorPetr Mrázek <peterix@gmail.com>2013-12-10 07:22:22 +0100
committerPetr Mrázek <peterix@gmail.com>2013-12-10 07:22:22 +0100
commitaa61bbe9e414648399aff2802df5b587dee1a084 (patch)
treeff7809bea445bb76c9fd27a3245e1b2cb7c72596 /logic/updater
parent3f5c46a1c4b27e82976e0067e4ec2d6abfffd9ba (diff)
parent712b87c643bbd7bc4ed2cfd459d0b9fdb69e5f0d (diff)
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Merge branch 'develop' of github.com:MultiMC/MultiMC5 into develop
Conflicts: CMakeLists.txt gui/MainWindow.cpp
Diffstat (limited to 'logic/updater')
-rw-r--r--logic/updater/DownloadUpdateTask.cpp398
-rw-r--r--logic/updater/DownloadUpdateTask.h192
-rw-r--r--logic/updater/UpdateChecker.cpp247
-rw-r--r--logic/updater/UpdateChecker.h106
4 files changed, 943 insertions, 0 deletions
diff --git a/logic/updater/DownloadUpdateTask.cpp b/logic/updater/DownloadUpdateTask.cpp
new file mode 100644
index 00000000..3fe24482
--- /dev/null
+++ b/logic/updater/DownloadUpdateTask.cpp
@@ -0,0 +1,398 @@
+/* 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 "DownloadUpdateTask.h"
+
+#include "MultiMC.h"
+#include "logic/updater/UpdateChecker.h"
+#include "logic/net/NetJob.h"
+#include "pathutils.h"
+
+#include <QFile>
+#include <QTemporaryDir>
+#include <QCryptographicHash>
+
+#include <QDomDocument>
+
+
+DownloadUpdateTask::DownloadUpdateTask(QString repoUrl, int versionId, QObject* parent) :
+ Task(parent)
+{
+ m_cVersionId = MMC->version().build;
+
+ m_nRepoUrl = repoUrl;
+ m_nVersionId = versionId;
+
+ m_updateFilesDir.setAutoRemove(false);
+}
+
+void DownloadUpdateTask::executeTask()
+{
+ // GO!
+ // This will call the next step when it's done.
+ findCurrentVersionInfo();
+}
+
+void DownloadUpdateTask::findCurrentVersionInfo()
+{
+ setStatus(tr("Finding information about the current version."));
+
+ auto checker = MMC->updateChecker();
+
+ // This runs after we've tried loading the channel list.
+ // If the channel list doesn't need to be loaded, this will be called immediately.
+ // If the channel list does need to be loaded, this will be called when it's done.
+ auto processFunc = [this, &checker] () -> void
+ {
+ // Now, check the channel list again.
+ if (checker->hasChannels())
+ {
+ // We still couldn't load the channel list. Give up. Call loadVersionInfo and return.
+ QLOG_INFO() << "Reloading the channel list didn't work. Giving up.";
+ loadVersionInfo();
+ return;
+ }
+
+ QList<UpdateChecker::ChannelListEntry> channels = checker->getChannelList();
+ QString channelId = MMC->version().channel;
+
+ // Search through the channel list for a channel with the correct ID.
+ for (auto channel : channels)
+ {
+ if (channel.id == channelId)
+ {
+ QLOG_INFO() << "Found matching channel.";
+ m_cRepoUrl = channel.url;
+ break;
+ }
+ }
+
+ // Now that we've done that, load version info.
+ loadVersionInfo();
+ };
+
+ if (checker->hasChannels())
+ {
+ // Load the channel list and wait for it to finish loading.
+ QLOG_INFO() << "No channel list entries found. Will try reloading it.";
+
+ QObject::connect(checker.get(), &UpdateChecker::channelListLoaded, processFunc);
+ checker->updateChanList();
+ }
+ else
+ {
+ processFunc();
+ }
+}
+
+void DownloadUpdateTask::loadVersionInfo()
+{
+ setStatus(tr("Loading version information."));
+
+ // Create the net job for loading version info.
+ NetJob* netJob = new NetJob("Version Info");
+
+ // Find the index URL.
+ QUrl newIndexUrl = QUrl(m_nRepoUrl).resolved(QString::number(m_nVersionId) + ".json");
+
+ // Add a net action to download the version info for the version we're updating to.
+ netJob->addNetAction(ByteArrayDownload::make(newIndexUrl));
+
+ // If we have a current version URL, get that one too.
+ if (!m_cRepoUrl.isEmpty())
+ {
+ QUrl cIndexUrl = QUrl(m_cRepoUrl).resolved(QString::number(m_cVersionId) + ".json");
+ netJob->addNetAction(ByteArrayDownload::make(cIndexUrl));
+ }
+
+ // Connect slots so we know when it's done.
+ QObject::connect(netJob, &NetJob::succeeded, this, &DownloadUpdateTask::vinfoDownloadFinished);
+ QObject::connect(netJob, &NetJob::failed, this, &DownloadUpdateTask::vinfoDownloadFailed);
+
+ // Store the NetJob in a class member. We don't want to lose it!
+ m_vinfoNetJob.reset(netJob);
+
+ // Finally, we start the network job and the thread's event loop to wait for it to finish.
+ netJob->start();
+}
+
+void DownloadUpdateTask::vinfoDownloadFinished()
+{
+ // Both downloads succeeded. OK. Parse stuff.
+ parseDownloadedVersionInfo();
+}
+
+void DownloadUpdateTask::vinfoDownloadFailed()
+{
+ // Something failed. We really need the second download (current version info), so parse downloads anyways as long as the first one succeeded.
+ if (m_vinfoNetJob->first()->m_status != Job_Failed)
+ {
+ parseDownloadedVersionInfo();
+ return;
+ }
+
+ // TODO: Give a more detailed error message.
+ QLOG_ERROR() << "Failed to download version info files.";
+ emitFailed(tr("Failed to download version info files."));
+}
+
+void DownloadUpdateTask::parseDownloadedVersionInfo()
+{
+ setStatus(tr("Reading file lists."));
+
+ parseVersionInfo(NEW_VERSION, &m_nVersionFileList);
+
+ // If there is a second entry in the network job's list, load it as the current version's info.
+ if (m_vinfoNetJob->size() >= 2 && m_vinfoNetJob->operator[](1)->m_status != Job_Failed)
+ {
+ parseVersionInfo(CURRENT_VERSION, &m_cVersionFileList);
+ }
+
+ // We don't need this any more.
+ m_vinfoNetJob.reset();
+
+ // Now that we're done loading version info, we can move on to the next step. Process file lists and download files.
+ processFileLists();
+}
+
+void DownloadUpdateTask::parseVersionInfo(VersionInfoFileEnum vfile, VersionFileList* list)
+{
+ if (vfile == CURRENT_VERSION) setStatus(tr("Reading file list for current version."));
+ else if (vfile == NEW_VERSION) setStatus(tr("Reading file list for new version."));
+
+ QLOG_DEBUG() << "Reading file list for" << (vfile == NEW_VERSION ? "new" : "current") << "version.";
+
+ QByteArray data;
+ {
+ ByteArrayDownloadPtr dl = std::dynamic_pointer_cast<ByteArrayDownload>(
+ vfile == NEW_VERSION ? m_vinfoNetJob->first() : m_vinfoNetJob->operator[](1));
+ data = dl->m_data;
+ }
+
+ QJsonParseError jsonError;
+ QJsonDocument jsonDoc = QJsonDocument::fromJson(data, &jsonError);
+ if (jsonError.error != QJsonParseError::NoError)
+ {
+ QLOG_ERROR() << "Failed to parse version info JSON:" << jsonError.errorString() << "at" << jsonError.offset;
+ return;
+ }
+
+ QJsonObject json = jsonDoc.object();
+
+ QLOG_DEBUG() << "Loading version info from JSON.";
+ QJsonArray filesArray = json.value("Files").toArray();
+ for (QJsonValue fileValue : filesArray)
+ {
+ QJsonObject fileObj = fileValue.toObject();
+
+ VersionFileEntry file{
+ fileObj.value("Path").toString(),
+ fileObj.value("Perms").toVariant().toInt(),
+ FileSourceList(),
+ fileObj.value("MD5").toString(),
+ };
+ QLOG_DEBUG() << "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 if (type == "httpc")
+ {
+ file.sources.append(FileSource("httpc", sourceObj.value("Url").toString(), sourceObj.value("CompressionType").toString()));
+ }
+ else
+ {
+ QLOG_WARN() << "Unknown source type" << type << "ignored.";
+ }
+ }
+
+ QLOG_DEBUG() << "Loaded info for" << file.path;
+
+ list->append(file);
+ }
+}
+
+void DownloadUpdateTask::processFileLists()
+{
+ setStatus(tr("Processing file lists. Figuring out how to install the update."));
+
+ // 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 : m_cVersionFileList)
+ {
+ for (VersionFileEntry newEntry : m_nVersionFileList)
+ {
+ if (newEntry.path == entry.path)
+ continue;
+ }
+ // If the loop reaches the end, we didn't find a match. Delete the file.
+ m_operationList.append(UpdateOperation::DeleteOp(entry.path));
+ }
+
+ // Create a network job for downloading files.
+ NetJob* netJob = new NetJob("Update Files");
+
+ // Next, check each file in MultiMC's folder and see if we need to update them.
+ for (VersionFileEntry entry : m_nVersionFileList)
+ {
+ // 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;
+ QFile entryFile(entry.path);
+ if (entryFile.open(QFile::ReadOnly))
+ {
+ QCryptographicHash hash(QCryptographicHash::Md5);
+ hash.addData(entryFile.readAll());
+ fileMD5 = hash.result().toHex();
+ }
+
+ if (!entryFile.exists() || fileMD5.isEmpty() || fileMD5 != entry.md5)
+ {
+ QLOG_DEBUG() << "Found file" << entry.path << "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")
+ {
+ QLOG_DEBUG() << "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 = PathCombine(m_updateFilesDir.path(), 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 = MD5EtagDownload::make(source.url, dlPath);
+ download->m_check_md5 = true;
+ download->m_expected_md5 = entry.md5;
+ netJob->addNetAction(download);
+
+ // Now add a copy operation to our operations list to install the file.
+ m_operationList.append(UpdateOperation::CopyOp(dlPath, entry.path, entry.mode));
+ }
+ }
+ }
+ }
+
+ // Add listeners to wait for the downloads to finish.
+ QObject::connect(netJob, &NetJob::succeeded, this, &DownloadUpdateTask::fileDownloadFinished);
+ QObject::connect(netJob, &NetJob::progress, this, &DownloadUpdateTask::fileDownloadProgressChanged);
+ QObject::connect(netJob, &NetJob::failed, this, &DownloadUpdateTask::fileDownloadFailed);
+
+ // Now start the download.
+ setStatus(tr("Downloading %1 update files.").arg(QString::number(netJob->size())));
+ QLOG_DEBUG() << "Begin downloading update files to" << m_updateFilesDir.path();
+ m_filesNetJob.reset(netJob);
+ netJob->start();
+
+ writeInstallScript(m_operationList, PathCombine(m_updateFilesDir.path(), "file_list.xml"));
+}
+
+void DownloadUpdateTask::writeInstallScript(UpdateOperationList& opsList, QString scriptFile)
+{
+ // Build the base structure of the XML document.
+ QDomDocument doc;
+
+ QDomElement root = doc.createElement("update");
+ root.setAttribute("version", "3");
+ doc.appendChild(root);
+
+ QDomElement installFiles = doc.createElement("install");
+ root.appendChild(installFiles);
+
+ QDomElement removeFiles = doc.createElement("uninstall");
+ root.appendChild(removeFiles);
+
+ // Write the operation list to the XML document.
+ for (UpdateOperation op : opsList)
+ {
+ QDomElement file = doc.createElement("file");
+
+ switch (op.type)
+ {
+ case UpdateOperation::OP_COPY:
+ {
+ // Install the file.
+ QDomElement name = doc.createElement("source");
+ QDomElement path = doc.createElement("dest");
+ QDomElement mode = doc.createElement("mode");
+ name.appendChild(doc.createTextNode(op.file));
+ path.appendChild(doc.createTextNode(op.dest));
+ // We need to add a 0 at the beginning here, because Qt doesn't convert to octal correctly.
+ mode.appendChild(doc.createTextNode("0" + QString::number(op.mode, 8)));
+ file.appendChild(name);
+ file.appendChild(path);
+ file.appendChild(mode);
+ installFiles.appendChild(file);
+ QLOG_DEBUG() << "Will install file" << op.file;
+ }
+ break;
+
+ case UpdateOperation::OP_DELETE:
+ {
+ // Delete the file.
+ file.appendChild(doc.createTextNode(op.file));
+ removeFiles.appendChild(file);
+ QLOG_DEBUG() << "Will remove file" << op.file;
+ }
+ break;
+
+ default:
+ QLOG_WARN() << "Can't write update operation of type" << op.type << "to file. Not implemented.";
+ continue;
+ }
+ }
+
+ // Write the XML document to the file.
+ QFile outFile(scriptFile);
+
+ if (outFile.open(QIODevice::WriteOnly))
+ {
+ outFile.write(doc.toByteArray());
+ }
+ else
+ {
+ emitFailed(tr("Failed to write update script file."));
+ }
+}
+
+void DownloadUpdateTask::fileDownloadFinished()
+{
+ emitSucceeded();
+}
+
+void DownloadUpdateTask::fileDownloadFailed()
+{
+ // TODO: Give more info about the failure.
+ QLOG_ERROR() << "Failed to download update files.";
+ emitFailed(tr("Failed to download update files."));
+}
+
+void DownloadUpdateTask::fileDownloadProgressChanged(qint64 current, qint64 total)
+{
+ setProgress((int)(((float)current / (float)total)*100));
+}
+
+QString DownloadUpdateTask::updateFilesDir()
+{
+ return m_updateFilesDir.path();
+}
+
diff --git a/logic/updater/DownloadUpdateTask.h b/logic/updater/DownloadUpdateTask.h
new file mode 100644
index 00000000..f5b23d12
--- /dev/null
+++ b/logic/updater/DownloadUpdateTask.h
@@ -0,0 +1,192 @@
+/* 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.
+ */
+
+#pragma once
+
+#include "logic/tasks/Task.h"
+#include "logic/net/NetJob.h"
+
+/*!
+ * The DownloadUpdateTask is a task that takes a given version ID and repository URL,
+ * downloads that version's files from the repository, and prepares to install them.
+ */
+class DownloadUpdateTask : public Task
+{
+ Q_OBJECT
+
+public:
+ explicit DownloadUpdateTask(QString repoUrl, int versionId, QObject* parent=0);
+
+ /*!
+ * Gets the directory that contains the update files.
+ */
+ QString updateFilesDir();
+
+protected:
+ // TODO: We should probably put these data structures into a separate header...
+
+ /*!
+ * Struct that describes an entry in a VersionFileEntry's `Sources` list.
+ */
+ struct FileSource
+ {
+ FileSource(QString type, QString url, QString compression="")
+ {
+ this->type = type;
+ this->url = url;
+ this->compressionType = compression;
+ }
+
+ QString type;
+ QString url;
+ QString compressionType;
+ };
+
+ typedef QList<FileSource> FileSourceList;
+
+ /*!
+ * Structure that describes an entry in a GoUpdate version's `Files` list.
+ */
+ struct VersionFileEntry
+ {
+ QString path;
+ int mode;
+ FileSourceList sources;
+ QString md5;
+ };
+
+ typedef QList<VersionFileEntry> VersionFileList;
+
+
+ /*!
+ * Structure that describes an operation to perform when installing updates.
+ */
+ struct UpdateOperation
+ {
+ static UpdateOperation CopyOp(QString fsource, QString fdest, int fmode=0644) { return UpdateOperation{OP_COPY, fsource, fdest, fmode}; }
+ static UpdateOperation MoveOp(QString fsource, QString fdest, int fmode=0644) { return UpdateOperation{OP_MOVE, fsource, fdest, fmode}; }
+ static UpdateOperation DeleteOp(QString file) { return UpdateOperation{OP_DELETE, file, "", 0644}; }
+ static UpdateOperation ChmodOp(QString file, int fmode) { return UpdateOperation{OP_CHMOD, file, "", fmode}; }
+
+ //! Specifies the type of operation that this is.
+ enum Type
+ {
+ OP_COPY,
+ OP_DELETE,
+ OP_MOVE,
+ OP_CHMOD,
+ } type;
+
+ //! The file to operate on. If this is a DELETE or CHMOD operation, this is the file that will be modified.
+ QString file;
+
+ //! The destination file. If this is a DELETE or CHMOD operation, this field will be ignored.
+ QString dest;
+
+ //! The mode to change the source file to. Ignored if this isn't a CHMOD operation.
+ int mode;
+
+ // Yeah yeah, polymorphism blah blah inheritance, blah blah object oriented. I'm lazy, OK?
+ };
+
+ typedef QList<UpdateOperation> UpdateOperationList;
+
+ /*!
+ * Used for arguments to parseVersionInfo and friends to specify which version info file to parse.
+ */
+ enum VersionInfoFileEnum { NEW_VERSION, CURRENT_VERSION };
+
+
+ //! Entry point for tasks.
+ virtual void executeTask();
+
+ /*!
+ * Attempts to find the version ID and repository URL for the current version.
+ * The function will look up the repository URL in the UpdateChecker's channel list.
+ * If the repository URL can't be found, this function will return false.
+ */
+ virtual void findCurrentVersionInfo();
+
+ /*!
+ * Downloads the version info files from the repository.
+ * The files for both the current build, and the build that we're updating to need to be downloaded.
+ * If the current version's info file can't be found, MultiMC will not delete files that
+ * were removed between versions. It will still replace files that have changed, however.
+ * Note that although the repository URL for the current version is not given to the update task,
+ * the task will attempt to look it up in the UpdateChecker's channel list.
+ * If an error occurs here, the function will call emitFailed and return false.
+ */
+ virtual void loadVersionInfo();
+
+ /*!
+ * This function is called when version information is finished downloading.
+ * This handles parsing the JSON downloaded by the version info network job and then calls processFileLists.
+ * Note that this function will sometimes be called even if the version info download emits failed. If
+ * we couldn't download the current version's info file, we can still update. This will be called even if the
+ * current version's info file fails to download, as long as the new version's info file succeeded.
+ */
+ virtual void parseDownloadedVersionInfo();
+
+ /*!
+ * Loads the file list from the given version info JSON object into the given list.
+ */
+ virtual void parseVersionInfo(VersionInfoFileEnum vfile, VersionFileList* list);
+
+ /*!
+ * Takes a list of file entries for the current version's files and the new version's files
+ * and populates the downloadList and operationList with information about how to download and install the update.
+ */
+ virtual void processFileLists();
+
+ /*!
+ * Takes the operations list and writes an install script for the updater to the update files directory.
+ */
+ virtual void writeInstallScript(UpdateOperationList& opsList, QString scriptFile);
+
+ VersionFileList m_downloadList;
+ UpdateOperationList m_operationList;
+
+ VersionFileList m_nVersionFileList;
+ VersionFileList m_cVersionFileList;
+
+ //! Network job for downloading version info files.
+ NetJobPtr m_vinfoNetJob;
+
+ //! Network job for downloading update files.
+ NetJobPtr m_filesNetJob;
+
+ // Version ID and repo URL for the new version.
+ int m_nVersionId;
+ QString m_nRepoUrl;
+
+ // Version ID and repo URL for the currently installed version.
+ int m_cVersionId;
+ QString m_cRepoUrl;
+
+ /*!
+ * Temporary directory to store update files in.
+ * This will be set to not auto delete. Task will fail if this fails to be created.
+ */
+ QTemporaryDir m_updateFilesDir;
+
+protected slots:
+ void vinfoDownloadFinished();
+ void vinfoDownloadFailed();
+
+ void fileDownloadFinished();
+ void fileDownloadFailed();
+ void fileDownloadProgressChanged(qint64 current, qint64 total);
+};
+
diff --git a/logic/updater/UpdateChecker.cpp b/logic/updater/UpdateChecker.cpp
new file mode 100644
index 00000000..5ff1898e
--- /dev/null
+++ b/logic/updater/UpdateChecker.cpp
@@ -0,0 +1,247 @@
+/* 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();
+}
+
diff --git a/logic/updater/UpdateChecker.h b/logic/updater/UpdateChecker.h
new file mode 100644
index 00000000..59fb8e47
--- /dev/null
+++ b/logic/updater/UpdateChecker.h
@@ -0,0 +1,106 @@
+/* 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.
+ */
+
+#pragma once
+
+#include "logic/net/NetJob.h"
+
+#include <QUrl>
+
+class UpdateChecker : public QObject
+{
+ Q_OBJECT
+
+public:
+ UpdateChecker();
+ void checkForUpdate();
+
+ /*!
+ * Causes the update checker to download the channel list from the URL specified in config.h (generated by CMake).
+ * If this isn't called before checkForUpdate(), it will automatically be called.
+ */
+ void updateChanList();
+
+ /*!
+ * An entry in the channel list.
+ */
+ struct ChannelListEntry
+ {
+ QString id;
+ QString name;
+ QString description;
+ QString url;
+ };
+
+ /*!
+ * Returns a the current channel list.
+ * If the channel list hasn't been loaded, this list will be empty.
+ */
+ QList<ChannelListEntry> getChannelList() const;
+
+ /*!
+ * Returns true if the channel list is empty.
+ */
+ bool hasChannels() const;
+
+signals:
+ //! Signal emitted when an update is available. Passes the URL for the repo and the ID and name for the version.
+ void updateAvailable(QString repoUrl, QString versionName, int versionId);
+
+ //! Signal emitted when the channel list finishes loading or fails to load.
+ void channelListLoaded();
+
+private slots:
+ void updateCheckFinished();
+ void updateCheckFailed();
+
+ void chanListDownloadFinished();
+ void chanListDownloadFailed();
+
+private:
+ NetJobPtr indexJob;
+ NetJobPtr chanListJob;
+
+ QString m_repoUrl;
+
+ QString m_channelListUrl;
+ QString m_currentChannel;
+
+ QList<ChannelListEntry> m_channels;
+
+ /*!
+ * True while the system is checking for updates.
+ * If checkForUpdate is called while this is true, it will be ignored.
+ */
+ bool m_updateChecking;
+
+ /*!
+ * True if the channel list has loaded.
+ * If this is false, trying to check for updates will call updateChanList first.
+ */
+ bool m_chanListLoaded;
+
+ /*!
+ * Set to true while the channel list is currently loading.
+ */
+ bool m_chanListLoading;
+
+ /*!
+ * Set to true when checkForUpdate is called while the channel list isn't loaded.
+ * When the channel list finishes loading, if this is true, the update checker will check for updates.
+ */
+ bool m_checkUpdateWaiting;
+};
+