PrismLauncher/libraries/logic/updater/GoUpdate.h

#pragma once
#include <QByteArray>
#include <net/NetJob.h>

#include "multimc_logic_export.h"

namespace GoUpdate
{

/**
 * A temporary object exchanged between updated checker and the actual update task
 */
struct MULTIMC_LOGIC_EXPORT Status
{
	bool updateAvailable = false;

	int newVersionId = -1;
	QString newRepoUrl;

	int currentVersionId = -1;
	QString currentRepoUrl;

	// path to the root of the application
	QString rootPath;
};

/**
 * Struct that describes an entry in a VersionFileEntry's `Sources` list.
 */
struct MULTIMC_LOGIC_EXPORT FileSource
{
	FileSource(QString type, QString url, QString compression="")
	{
		this->type = type;
		this->url = url;
		this->compressionType = compression;
	}

	bool operator==(const FileSource &f2) const
	{
		return type == f2.type && url == f2.url && compressionType == f2.compressionType;
	}

	QString type;
	QString url;
	QString compressionType;
};
typedef QList<FileSource> FileSourceList;

/**
 * Structure that describes an entry in a GoUpdate version's `Files` list.
 */
struct MULTIMC_LOGIC_EXPORT VersionFileEntry
{
	QString path;
	int mode;
	FileSourceList sources;
	QString md5;
	bool operator==(const VersionFileEntry &v2) const
	{
		return path == v2.path && mode == v2.mode && sources == v2.sources && md5 == v2.md5;
	}
};
typedef QList<VersionFileEntry> VersionFileList;

/**
 * Structure that describes an operation to perform when installing updates.
 */
struct MULTIMC_LOGIC_EXPORT Operation
{
	static Operation CopyOp(QString fsource, QString fdest, int fmode=0644)
	{
		return Operation{OP_REPLACE, fsource, fdest, fmode};
	}
	static Operation DeleteOp(QString file)
	{
		return Operation{OP_DELETE, file, "", 0644};
	}

	// FIXME: for some types, some of the other fields are irrelevant!
	bool operator==(const Operation &u2) const
	{
		return type == u2.type && file == u2.file && dest == u2.dest && mode == u2.mode;
	}

	//! Specifies the type of operation that this is.
	enum Type
	{
		OP_REPLACE,
		OP_DELETE,
	} type;

	//! The file to operate on.
	QString file;

	//! The destination file.
	QString dest;

	//! The mode to change the source file to.
	int mode;
};
typedef QList<Operation> OperationList;

/**
 * Loads the file list from the given version info JSON object into the given list.
 */
bool MULTIMC_LOGIC_EXPORT parseVersionInfo(const QByteArray &data, VersionFileList& list, QString &error);

/*!
 * 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.
 */
bool MULTIMC_LOGIC_EXPORT processFileLists
(
	const VersionFileList &currentVersion,
	const VersionFileList &newVersion,
	const QString &rootPath,
	const QString &tempPath,
	NetJobPtr job,
	OperationList &ops
);

/*!
 * This fixes destination paths for OSX - removes 'MultiMC.app' prefix
 * The updater runs in MultiMC.app/Contents/MacOs by default
 * The destination paths are such as this: MultiMC.app/blah/blah
 *
 * @return false if the path couldn't be fixed (is invalid)
 */
bool MULTIMC_LOGIC_EXPORT fixPathForOSX(QString &path);

}
Q_DECLARE_METATYPE(GoUpdate::Status);