UpdateChecker.h

// MuldeR's Utilities for Qt
// Copyright (C) 2004-2021 LoRd_MuldeR <MuldeR2@GMX.de>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// http://www.gnu.org/licenses/lgpl-2.1.txt

#pragma once

//MUtils
#include <MUtils/Global.h>

//Qt
#include <QThread>
#include <QDate>

class QUrl;


namespace MUtils
{
    class MUTILS_API UpdateCheckerInfo
    {
        friend class UpdateChecker;

    public:
        UpdateCheckerInfo(void);
        void resetInfo(void);
        bool isComplete(void);

        const quint32 &getBuildNo(void)          const { return m_buildNo;          }
        const QDate   &getBuildDate(void)        const { return m_buildDate;        }
        const QString &getDownloadSite(void)     const { return m_downloadSite;     }
        const QString &getDownloadAddress(void)  const { return m_downloadAddress;  }
        const QString &getDownloadFilename(void) const { return m_downloadFilename; }
        const QString &getDownloadFilecode(void) const { return m_downloadFilecode; }
        const QString &getDownloadChecksum(void) const { return m_downloadChecksum; }

    private:
        quint32 m_buildNo;
        QDate m_buildDate;
        QString m_downloadSite;
        QString m_downloadAddress;
        QString m_downloadFilename;
        QString m_downloadFilecode;
        QString m_downloadChecksum;
    };

    // ----------------------------------------------------------------

    class MUTILS_API UpdateChecker : public QThread
    {
        Q_OBJECT

    public:
        enum
        {
            UpdateStatus_NotStartedYet             = 0,
            UpdateStatus_CheckingConnection        = 1,
            UpdateStatus_FetchingUpdates           = 2,
            UpdateStatus_CompletedUpdateAvailable  = 3,
            UpdateStatus_CompletedNoUpdates        = 4,
            UpdateStatus_CompletedNewVersionOlder  = 5,
            UpdateStatus_ErrorNoConnection         = 6,
            UpdateStatus_ErrorConnectionTestFailed = 7,
            UpdateStatus_ErrorFetchUpdateInfo      = 8,
            UpdateStatus_CancelledByUser           = 9
        }
        update_status_t;

        UpdateChecker(const QString &binCurl, const QString &binGnuPG, const QString &binKeys, const QString &applicationId, const quint32 &installedBuildNo, const bool betaUpdates, const bool testMode = false);
        ~UpdateChecker(void);

        const int  getUpdateStatus(void)             const { return m_status; }
        const bool getSuccess(void)                  const { return m_success; };
        const int  getMaximumProgress(void)          const { return m_maxProgress; };
        const int  getCurrentProgress(void)          const { return m_progress; };
        const UpdateCheckerInfo *getUpdateInfo(void) const { return m_updateInfo.data(); }

        bool cancel(void) { return m_cancelled.ref(); }

    public slots:
        void start(Priority = InheritPriority);

    protected:
        void run(void);
        void checkForUpdates(void);
        void testMirrorsList(void);

    signals:
        void statusChanged(const int status);
        void progressChanged(const int progress);
        void messageLogged(const QString &text);

    private:
        const int m_maxProgress;
        QScopedPointer<UpdateCheckerInfo> m_updateInfo;
    
        const bool m_betaUpdates;
        const bool m_testMode;

        const QString m_applicationId;
        const quint32 m_installedBuildNo;

        const QString m_binaryCurl;
        const QString m_binaryGnuPG;
        const QString m_binaryKeys;

        const QScopedPointer<const QHash<QString, QString>> m_environment;

        QAtomicInt m_success;
        QAtomicInt m_cancelled;

        int m_status;
        int m_progress;

        inline void setStatus(const int status);
        inline void setProgress(const int progress);
        inline void log(const QString &str1, const QString &str2 = QString(), const QString &str3 = QString(), const QString &str4 = QString());

        bool getUpdateInfo(const QString &url, const QString &outFileVers, const QString &outFileSign);
        bool tryContactHost(const QString &hostname, const int &timeoutMsec);
        bool parseVersionInfo(const QString &file, UpdateCheckerInfo *const updateInfo);

        bool getFile(const QUrl &url, const QString &outFile, const unsigned int maxRedir = 8U);
        bool checkSignature(const QString &file, const QString &signature);
        bool tryUpdateMirror(UpdateCheckerInfo *updateInfo, const QString &url, const bool &quick);

        bool execCurl(const QStringList &args, const QString &workingDir, const int timeout);
        int execProcess(const QString &programFile, const QStringList &args, const QString &workingDir, const int timeout);
    };
}