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/*
This file is part of the KDE libraries
Copyright (c) 2000 Waldo Bastian <bastian@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef _KRFCDATE_H_
#define _KRFCDATE_H_
#include <qstring.h>
#include <time.h>
#include "kdelibs_export.h"
/**
* The KRFCDate class contains functions related to the parsing of dates.
*
* @author Waldo Bastian <bastian@kde.org>
*/
class KDECORE_EXPORT KRFCDate
{
public:
/**
* This function tries to parse a string containing a date/time in any
* of the formats specified by RFC822, RFC850, RFC1036, RFC1123 and RFC2822.
*
* If the date/time could not be parsed, 0 is returned. If the
* parsed date is epoch, then epoch+1 is returned so that a valid
* date will not be confused with an improper date string.
*
* The date/time returned is converted to UTC.
* @param date the date to parse
* @return the date, or 0 if not possible
*/
static time_t parseDate(const QString &date);
/**
* This function tries to parse a string containing a date/time in
* any of the formats specified by http://www.w3.org/TR/NOTE-datetime
*
* This is a subset of the formats specified in ISO8601.
*
* If the date/time could not be parsed, 0 is returned. If the
* parsed date is epoch, then epoch+1 is returned so that a valid
* date will not be confused with an improper date string.
*
* The date/time returned is converted to UTC.
*
* @param date the date to parse
* @return the date, or 0 if not possible
*/
static time_t parseDateISO8601(const QString &date);
/**
* Returns the local timezone offset to UTC in minutes
* @return the local timezone offset in minutes
*/
static int localUTCOffset();
/**
* Returns a string representation of the given date and time formated
* in conformance to RFC2822.
*
* @param utcTime a date and time in UTC
* @param utcOffset the offset to UTC in minutes
* @return the string representation of the date
*/
static QCString rfc2822DateString(time_t utcTime, int utcOffset);
/**
* Returns a string representation of the given date and time formated
* in conformance to RFC2822.
*
* Provided for convenience, the function is equivalent to
* rfc2822DateString(t, localUTCOffset()).
*
* @param utcTime a date and time in UTC
* @return the string representation of the date
*/
static QCString rfc2822DateString(time_t utcTime);
};
#endif
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