118 lines
3.4 KiB
C++
118 lines
3.4 KiB
C++
// This file is part of RSS Guard.
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//
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// Copyright (C) 2011-2014 by Martin Rotter <rotter.martinos@gmail.com>
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//
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// RSS Guard is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// RSS Guard is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with RSS Guard. If not, see <http://www.gnu.org/licenses/>.
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#ifndef SYSTEMFACTORY_H
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#define SYSTEMFACTORY_H
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#include <QObject>
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#include <QPointer>
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#include <QMutex>
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#include <QMetaType>
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#include <QHash>
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#include <QPair>
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#include <QNetworkReply>
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class UpdateUrl {
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public:
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QString m_fileUrl;
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QString m_platform;
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QString m_os;
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};
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class UpdateInfo {
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public:
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enum UpdateType {
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// Corresponding enum to "maintenace" from UPDATES file.
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Maintenance,
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// Corresponding enum to "evolution" from UPDATES file.
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Evolution
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};
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QString m_availableVersion;
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QString m_changes;
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UpdateType m_type;
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QHash<QString, UpdateUrl> m_urls;
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};
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Q_DECLARE_METATYPE(UpdateInfo)
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class SystemFactory : public QObject {
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Q_OBJECT
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private:
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// Constructors and destructors.
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explicit SystemFactory(QObject *parent = 0);
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// Performs parsing of downloaded file with list of updates.
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UpdateInfo parseUpdatesFile(const QByteArray &updates_file);
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public:
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// Constructors and destructors.
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virtual ~SystemFactory();
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// Specifies possible states of auto-start functionality.
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enum AutoStartStatus {
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Enabled,
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Disabled,
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Unavailable
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};
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// Returns current status of auto-start function.
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SystemFactory::AutoStartStatus getAutoStartStatus();
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// Sets new status for auto-start function.
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// Function returns false if setting of
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// new status failed.
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bool setAutoStartStatus(const SystemFactory::AutoStartStatus &new_status);
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#if defined(Q_OS_LINUX)
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// Returns standard location where auto-start .desktop files
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// should be placed.
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QString getAutostartDesktopFileLocation();
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#endif
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// Tries to download list with new updates.
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QPair<UpdateInfo, QNetworkReply::NetworkError> checkForUpdates();
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// Access to application-wide close lock.
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inline QMutex *applicationCloseLock() const {
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return m_applicationCloseLock;
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}
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// Singleton getter.
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static SystemFactory *instance();
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private:
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// This read-write lock is used by application on its close.
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// Application locks this lock for WRITING.
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// This means that if application locks that lock, then
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// no other transaction-critical action can acquire lock
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// for reading and won't be executed, so no critical action
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// will be running when application quits
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//
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// EACH critical action locks this lock for READING.
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// Several actions can lock this lock for reading.
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// But of user decides to close the application (in other words,
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// tries to lock the lock for writing), then no other
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// action will be allowed to lock for reading.
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QMutex *m_applicationCloseLock;
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static QPointer<SystemFactory> s_instance;
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};
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#endif // SYSTEMFACTORY_H
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