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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.
*/
#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);
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;
bool isExecutable;
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) { return UpdateOperation{OP_COPY, fsource, fdest, 644}; }
static UpdateOperation MoveOp(QString fsource, QString fdest) { return UpdateOperation{OP_MOVE, fsource, fdest, 644}; }
static UpdateOperation DeleteOp(QString file) { return UpdateOperation{OP_DELETE, file, "", 644}; }
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 source file. If this is a DELETE or CHMOD operation, this is the file that will be modified.
QString source;
//! 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();
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);
};
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