autoupdater.h

//------------------------------------------------------------------------------
// autoupdater.h
//------------------------------------------------------------------------------
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
// 02110-1301, USA.
//
//------------------------------------------------------------------------------
// Copyright (C) 2012 "Zalewa" <zalewapl@gmail.com>
//------------------------------------------------------------------------------
#ifndef DOOMSEEKER_UPDATER_AUTOUPDATER_H
#define DOOMSEEKER_UPDATER_AUTOUPDATER_H

#include "dptr.h"

#include <QDomDocument>
#include <QNetworkReply>
#include <QObject>
#include <QString>
#include <QUrl>

class UpdateChannel;
class UpdatePackage;

class AutoUpdater : public QObject
{
        Q_OBJECT

        public:
                enum ErrorCode
                {
                        EC_Ok = 0,
                        EC_Aborted,
                        EC_NullUpdateChannel,
                        EC_UpdaterInfoDownloadProblem,
                        EC_UpdaterInfoCannotParse,
                        EC_UpdaterInfoMissingMainProgramNode,
                        EC_MissingRevisionInfo,
                        EC_MissingDownloadUrl,
                        EC_InvalidDownloadUrl,
                        EC_PackageDownloadProblem,
                        EC_StorageDirCreateFailure,
                        EC_PackageCantBeSaved,
                        EC_ScriptCantBeSaved
                };

                static const QString PLUGIN_PREFIX;
                static const QString MAIN_PROGRAM_PACKAGE_NAME;
                static const QString UPDATER_INFO_URL_BASE;

                static QString errorCodeToString(ErrorCode code);
                static QString updaterScriptPath();
                static QString updateStorageDirPath();


                AutoUpdater(QObject* pParent = NULL);
                ~AutoUpdater();

                void abort();
                const UpdateChannel& channel() const;
                const QStringList& downloadedPackagesFilenames() const;
                ErrorCode errorCode() const;
                QString errorString() const;

                bool isRunning() const;

                QNetworkReply::NetworkError lastNetworkError() const;
                const QList<UpdatePackage>& newUpdatePackages() const;
                void setChannel(const UpdateChannel& updateChannel);
                void setIgnoreRevisions(const QMap<QString, QList<unsigned long long> >& packagesRevisions);
                void setRequireDownloadAndInstallConfirmation(bool b);
                void start();

        public slots:
                void confirmDownloadAndInstall();

        signals:
                void downloadAndInstallConfirmationRequested();
                void finished();

                void overallProgress(int current, int total, const QString& msg);
                void packageDownloadProgress(qint64 bytesReceived, qint64 bytesTotal);
                void statusMessage(const QString &message);

        private:
                DPtr<AutoUpdater> d;

                QDomDocument adjustUpdaterScriptXml(const QByteArray& xmlSource);
                void dumpUpdatePackagesToLog(const QList<UpdatePackage>& packages);
                void emitOverallProgress(const QString& message);
                void emitStatusMessage(const QString &message);
                void finishWithError(ErrorCode code);
                QUrl mkVersionDataFileUrl();

                ErrorCode saveUpdaterScript();
                void startPackageDownload(const UpdatePackage& pkg);
                void startPackageScriptDownload(const UpdatePackage& pkg);
                void startNextPackageDownload();

        private slots:
                void onPackageDownloadFinish();
                void onPackageDownloadReadyRead();
                void onPackageScriptDownloadFinish();
                void onUpdaterInfoDownloadFinish();
};

#endif