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 /******************************************************************************
  * konsolekalendarepoch.cpp                                                   *
  *                                                                            *
  * KonsoleKalendar is a command line interface to KDE calendars               *
  * SPDX-FileCopyrightText: 2002-2004 Tuukka Pasanen <illuusio@mailcity.com>   *
  * SPDX-FileCopyrightText: 2003-2005 Allen Winter <winter@kde.org>            *
  *                                                                            *
  * SPDX-License-Identifier: GPL-2.0-or-later WITH Qt-Commercial-exception-1.0 *
  *                                                                            *
  ******************************************************************************/
 /**
  * @file konsolekalendarepoch.cpp
  * Provides the KonsoleKalendarEpoch class definition.
  * @author Tuukka Pasanen
  * @author Allen Winter
  */
 #include "konsolekalendarepoch.h"
 
 #include <cstdlib>
 #include <iostream>
 
 using namespace std;
 
 KonsoleKalendarEpoch::KonsoleKalendarEpoch() = default;
 
 KonsoleKalendarEpoch::~KonsoleKalendarEpoch() = default;
 
 // By "epoch" we mean the number of seconds since 00:00:00 UTC on January 1 1970
 
 // Function to convert an epoch value into a QDateTime
 QDateTime KonsoleKalendarEpoch::epoch2QDateTime(uint epoch)
 {
     QDateTime dt;
     dt.setSecsSinceEpoch(epoch);
     return dt;
 }
 
 // Function to convert a QDateTime value into an epoch
 uint KonsoleKalendarEpoch::QDateTime2epoch(const QDateTime &dt)
 {
     // THIS FUNCTION CAN BE OFF BY 1 HOUR DUE TO DAYLIGHT SAVINGS TIME.
     // SORRY QT DOESN'T HANDLE DAYLIGHT SAVINGS TIME.
 
     // Compute #seconds to subtract for local timezone difference from UTC.
     int offset = QDateTime::currentDateTimeUtc().toSecsSinceEpoch() - QDateTime::currentDateTime().toSecsSinceEpoch();
     return dt.toSecsSinceEpoch() - offset;
 }
 
 #if defined(TEST)
 // Pass -DTEST to the compile command to create the test program, e.g:
 // cc -DTEST -I/usr/local/KDE/include  konsolekalendarepoch.cpp
 //           -L/usr/local/KDE/lib -lqt-mt -pthread
 main()
 {
     uint epoch;
     QDateTime dt;
 
     cout << endl;
     cout << "NOTE: Some tests may be off by 1 hour (3600 secs) "
          << "due to daylight savings time" << endl
          << endl;
 
     // Test1
     epoch = 0;
     dt = KonsoleKalendarEpoch::epoch2QDateTime(epoch);
     cout << "TEST 1:" << endl;
     cout << "epoch=" << epoch << " converts to " << dt.toString(Qt::TextDate) << endl;
 
     epoch = KonsoleKalendarEpoch::QDateTime2epoch(dt);
     cout << "date=" << dt.toString(Qt::TextDate) << " converts to "
          << "epoch=" << epoch << endl;
 
     // Test2
     epoch = 100000;
     dt = KonsoleKalendarEpoch::epoch2QDateTime(epoch);
     cout << "TEST 2:" << endl;
     cout << "epoch=" << epoch << " converts to " << dt.toString(Qt::TextDate) << endl;
 
     epoch = KonsoleKalendarEpoch::QDateTime2epoch(dt);
     cout << "date=" << dt.toString(Qt::TextDate) << " converts to "
          << "epoch=" << epoch << endl;
 
     // Test3
     epoch = 10000000;
     dt = KonsoleKalendarEpoch::epoch2QDateTime(epoch);
     cout << "TEST 3:" << endl;
     cout << "epoch=" << epoch << " converts to " << dt.toString(Qt::TextDate) << endl;
 
     epoch = KonsoleKalendarEpoch::QDateTime2epoch(dt);
     cout << "date=" << dt.toString(Qt::TextDate) << " converts to "
          << "epoch=" << epoch << endl;
 
     // Test4
     epoch = 1000000000;
     dt = KonsoleKalendarEpoch::epoch2QDateTime(epoch);
     cout << "TEST 4:" << endl;
     cout << "epoch=" << epoch << " converts to " << dt.toString(Qt::TextDate) << endl;
 
     epoch = KonsoleKalendarEpoch::QDateTime2epoch(dt);
     cout << "date=" << dt.toString(Qt::TextDate) << " converts to "
          << "epoch=" << epoch << endl;
 
     // Test5
     epoch = 10000000000;
     dt = KonsoleKalendarEpoch::epoch2QDateTime(epoch);
     cout << "TEST 5:" << endl;
     cout << "epoch=" << epoch << " converts to " << dt.toString(Qt::TextDate) << endl;
 
     epoch = KonsoleKalendarEpoch::QDateTime2epoch(dt);
     cout << "date=" << dt.toString(Qt::TextDate) << " converts to "
          << "epoch=" << epoch << endl;
 }
 #endif