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/*
* calendarcompat.cpp - compatibility for old calendar file formats
* Program: kalarm
* Copyright © 2001-2006 by David Jarvie <software@astrojar.org.uk>
*
* 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.
*/
#include "kalarm.h"
#include <tqfile.h>
#include <tqtextstream.h>
#include <tqstringlist.h>
#include <kapplication.h>
#include <kaboutdata.h>
#include <kdebug.h>
#include <libkcal/calendar.h>
#include "alarmevent.h"
#include "functions.h"
#include "preferences.h"
#include "calendarcompat.h"
using namespace KCal;
/******************************************************************************
* Find the version of KAlarm which wrote the calendar file, and do any
* necessary conversions to the current format. The calendar is not saved - any
* conversions will only be saved if changes are made later.
*/
void CalendarCompat::fix(KCal::Calendar& calendar, const TQString& localFile)
{
bool version057_UTC = false;
TQString subVersion;
int version = readKAlarmVersion(calendar, subVersion);
if (!version)
{
// The calendar was created either by the current version of KAlarm,
// or another program, so don't do any conversions
return;
}
if (version == KAlarm::Version(0,5,7) && !localFile.isEmpty())
{
// KAlarm version 0.5.7 - check whether times are stored in UTC, in which
// case it is the KDE 3.0.0 version, which needs adjustment of summer times.
version057_UTC = isUTC(localFile);
kdDebug(5950) << "CalendarCompat::fix(): KAlarm version 0.5.7 (" << (version057_UTC ? "" : "non-") << "UTC)\n";
}
else
kdDebug(5950) << "CalendarCompat::fix(): KAlarm version " << version << endl;
// Convert events to current KAlarm format for when calendar is saved
KAEvent::convertKCalEvents(calendar, version, version057_UTC);
}
/******************************************************************************
* Return the KAlarm version which wrote the calendar which has been loaded.
* The format is, for example, 000507 for 0.5.7.
* Reply = 0 if the calendar was created by the current version of KAlarm,
* KAlarm pre-0.3.5, or another program.
*/
int CalendarCompat::readKAlarmVersion(KCal::Calendar& calendar, TQString& subVersion)
{
subVersion = TQString();
const TQString& prodid = calendar.productId();
// Find the KAlarm identifier
TQString progname = TQString::tqfromLatin1(" KAlarm ");
int i = prodid.find(progname, 0, false);
if (i < 0)
{
// Older versions used KAlarm's translated name in the product ID, which
// could have created problems using a calendar in different locales.
progname = TQString(" ") + kapp->aboutData()->programName() + ' ';
i = prodid.find(progname, 0, false);
if (i < 0)
return 0; // calendar wasn't created by KAlarm
}
// Extract the KAlarm version string
TQString ver = prodid.mid(i + progname.length()).stripWhiteSpace();
i = ver.find('/');
int j = ver.find(' ');
if (j >= 0 && j < i)
i = j;
if (i <= 0)
return 0; // missing version string
ver = ver.left(i); // ver now contains the KAlarm version string
if (ver == KAlarm::currentCalendarVersionString())
return 0; // the calendar is in the current KAlarm format
return KAlarm::getVersionNumber(ver, &subVersion);
}
/******************************************************************************
* Check whether the calendar file has its times stored as UTC times,
* indicating that it was written by the KDE 3.0.0 version of KAlarm 0.5.7.
* Reply = true if times are stored in UTC
* = false if the calendar is a vCalendar, times are not UTC, or any error occurred.
*/
bool CalendarCompat::isUTC(const TQString& localFile)
{
// Read the calendar file into a TQString
TQFile file(localFile);
if (!file.open(IO_ReadOnly))
return false;
TQTextStream ts(&file);
ts.setEncoding(TQTextStream::Latin1);
TQString text = ts.read();
file.close();
// Extract the CREATED property for the first VEVENT from the calendar
TQString VCALENDAR = TQString::tqfromLatin1("BEGIN:VCALENDAR");
TQString VEVENT = TQString::tqfromLatin1("BEGIN:VEVENT");
TQString CREATED = TQString::tqfromLatin1("CREATED:");
TQStringList lines = TQStringList::split(TQChar('\n'), text);
for (TQStringList::ConstIterator it = lines.begin(); it != lines.end(); ++it)
{
if ((*it).startsWith(VCALENDAR))
{
while (++it != lines.end())
{
if ((*it).startsWith(VEVENT))
{
while (++it != lines.end())
{
if ((*it).startsWith(CREATED))
return (*it).endsWith("Z");
}
}
}
break;
}
}
return false;
}
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