1 /* 2 * Copyright (C) 2014 Nicolas Bonnefon and other contributors 3 * 4 * This file is part of glogg. 5 * 6 * glogg is free software: you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation, either version 3 of the License, or 9 * (at your option) any later version. 10 * 11 * glogg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with glogg. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #ifndef VERSIONCHECKER_H 21 #define VERSIONCHECKER_H 22 23 #include <ctime> 24 25 #include <QObject> 26 #include <QtNetwork> 27 28 #include "persistable.h" 29 30 // This class holds the configuration options and persistent 31 // data for the version checker 32 class VersionCheckerConfig : public Persistable 33 { 34 public: 35 VersionCheckerConfig(); 36 37 // Accessors 38 bool versionCheckingEnabled() const 39 { return enabled_; } 40 void setVersionCheckingEnabled( bool enabled ) 41 { enabled_ = enabled; } 42 std::time_t nextDeadline() const 43 { return next_deadline_; } 44 void setNextDeadline( std::time_t deadline ) 45 { next_deadline_ = deadline; } 46 47 // Reads/writes the current config in the QSettings object passed 48 virtual void saveToStorage( QSettings& settings ) const; 49 virtual void retrieveFromStorage( QSettings& settings ); 50 51 private: 52 bool enabled_; 53 std::time_t next_deadline_; 54 }; 55 56 // This class compares the current version number with the latest 57 // stored on a central server 58 class VersionChecker : public QObject 59 { 60 Q_OBJECT 61 62 public: 63 VersionChecker(); 64 ~VersionChecker(); 65 66 // Starts an asynchronous check for a newer version if it is needed. 67 // A newVersionFound signal is sent if one is found. 68 // In case of error or if no new version is found, no signal is emitted. 69 void startCheck(); 70 71 signals: 72 // New version "version" is available 73 void newVersionFound( const QString& version ); 74 75 private slots: 76 // Called when download is finished 77 void downloadFinished( QNetworkReply* ); 78 79 private: 80 static const char* VERSION_URL; 81 static const uint64_t CHECK_INTERVAL_S; 82 83 QNetworkAccessManager manager_; 84 }; 85 86 #endif 87