Beesnest/DcHttpTime.cpp

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/*
Copyright 2007 Erez Bibi (erezbibi@users.sourceforge.net)
This file is part of Beesnest.

Beesnest 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.

Beesnest 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 Beesnest; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/


/**
 * DcHttpTime.cpp: implementation of the DcHttpTime class.
 * for documentation see the header file.
 */

#include "DcHTTPTime.h"

CdcHttpTime::t_num_map CdcHttpTime::oMap;
CdcMutex CdcHttpTime::oMutex;

CdcHttpTime::CdcHttpTime (bool gmt)
{
    nTheTime = time (NULL);
    struct tm* pbt;
    oMutex.Lock ();
    if (gmt)
        pbt = gmtime (&nTheTime);
    else
        pbt = localtime (&nTheTime);
    if (pbt != NULL)
        oBrokenTime = *pbt;
    oMutex.Unlock ();
}


CdcHttpTime::CdcHttpTime (time_t time, bool gmt)
:nTheTime (time)
{
    struct tm* pbt;
    oMutex.Lock ();
    if (gmt)
        pbt = gmtime (&nTheTime);
    else
        pbt = localtime (&nTheTime);
    if (pbt != NULL)
        oBrokenTime = *pbt;
    oMutex.Unlock ();
}


CdcHttpTime::CdcHttpTime (int year, int month, int day,
                          int hour, int min, int sec)
{
    oBrokenTime.tm_sec = sec;
    oBrokenTime.tm_min = min;
    oBrokenTime.tm_hour = hour;
    oBrokenTime.tm_mday = day;
    oBrokenTime.tm_mon = month - 1;
    oBrokenTime.tm_year = year - 1900;
    oBrokenTime.tm_isdst = 0;

    nTheTime = mktime (&oBrokenTime);
}


CdcHttpTime::CdcHttpTime (const CdcString& strtime) throw (CdcException)
{
    if (strtime.Find ("GMT") == -1)
        *this = ParseAnsiCTime (strtime);
    else
        *this = ParseHttpTime (strtime);
}

CdcHttpTime CdcHttpTime::ToGmt ()
{
    AddHours (5);
}

CdcHttpTime CdcHttpTime::ToLocal ()
{

}

CdcString CdcHttpTime::Format (const CdcString& format_str) const
{
    char buff [BUFF_LEN];
    int len =  strftime (buff, BUFF_LEN, format_str.GetBuffer (),
        &oBrokenTime);
    if (len == 0)
        return EMPTY_STR;
    return CdcString (buff, len);
}


CdcString CdcHttpTime::FormatGmt (const CdcString& format_str) const
{
    char buff [BUFF_LEN];
    oMutex.Lock ();
    struct tm* pbt = gmtime (&nTheTime);
    int len =  strftime (buff, BUFF_LEN, format_str.GetBuffer (), pbt);
    oMutex.Unlock ();
    if (len == 0)
        return EMPTY_STR;
    return CdcString (buff, len);
}


CdcHttpTime& CdcHttpTime::AddSeconds (int secs)
{
    oBrokenTime.tm_sec += secs;
    nTheTime = mktime (&oBrokenTime);
    return *this;
}

CdcHttpTime& CdcHttpTime::AddMinutes (int mins)
{
    oBrokenTime.tm_min += mins;
    nTheTime = mktime (&oBrokenTime);
    return *this;
}

CdcHttpTime& CdcHttpTime::AddHours (int hrs)
{
    oBrokenTime.tm_hour += hrs;
    nTheTime = mktime (&oBrokenTime);
    return *this;
}

CdcHttpTime& CdcHttpTime::AddDays (int days)
{
    oBrokenTime.tm_mday += days;
    nTheTime = mktime (&oBrokenTime);
    return *this;
}

CdcHttpTime& CdcHttpTime::AddMonths (int months)
{
    oBrokenTime.tm_mon += months;
    nTheTime = mktime (&oBrokenTime);
    return *this;
}

CdcHttpTime& CdcHttpTime::AddYears (int years)
{
    oBrokenTime.tm_year += years;
    nTheTime = mktime (&oBrokenTime);
    return *this;
}


CdcHttpTime CdcHttpTime::ParseHttpTime (const CdcString& strtime) throw (CdcException)
{
    int day=-1, month=-1, year=-1, hour=-1, min=-1, sec=-1;
    CdcString time = strtime;
    time.Replace ("-", " ");

    int place = time.Find (',') + 2;
    if (place == 1) throw (CdcException ("Bad time format."));
    day = atoi (time.Mid (place, 2).GetBuffer ());

    place = time.Find (' ', place) + 1;
    if (place == 0) throw (CdcException ("Bad time format."));
    month = GetMonthNumber (time.Mid (place, 3));

    place = time.Find (' ', place) + 1;
    if (place == 0) throw (CdcException ("Bad time format."));
    year = atoi (time.Mid (place, 4).GetBuffer ());
    if (year < 100)
        if (year < 50)
            year += 2000;
        else
            year += 1999;

    place = time.Find (' ', place) + 1;
    if (place == 0) throw (CdcException ("Bad time format."));
    hour = atoi (time.Mid (place, 2).GetBuffer ());

    place = time.Find (':', place) + 1;
    if (place == 0) throw (CdcException ("Bad time format."));
    min = atoi (time.Mid (place, 2).GetBuffer ());

    place = time.Find (':', place) + 1;
    if (place == 0) throw (CdcException ("Bad time format."));
    sec = atoi (time.Mid (place, 2).GetBuffer ());

    if (day < 1 || day > 31 ||
        month < 1 || month > 12 ||
        year < 1970 || year > 2038 ||
        hour < 0 || hour > 23 ||
        min < 0 || min > 59 ||
        sec < 0 || sec > 59)
        throw (CdcException ("Bad time format."));

    return CdcHttpTime (year, month, day, hour, min, sec);
}


CdcHttpTime CdcHttpTime::ParseAnsiCTime (const CdcString& strtime) throw (CdcException)
{
    int day, month, year, hour, min, sec;
    CdcString time = strtime;

    int place = time.Find (' ') + 1;
    if (place == 0) throw (CdcException ("Bad time format."));
    month = GetMonthNumber (time.Mid (place, 3));

    place = time.Find (' ', place) + 1;
    if (place == 0) throw (CdcException ("Bad time format."));
    day = atoi (time.Mid (place, 2).GetBuffer ());

    place = time.Find (' ', place) + 1;
    if (place == 0) throw (CdcException ("Bad time format."));
    hour = atoi (time.Mid (place, 2).GetBuffer ());

    place = time.Find (':', place) + 1;
    if (place == 0) throw (CdcException ("Bad time format."));
    min = atoi (time.Mid (place, 2).GetBuffer ());

    place = time.Find (':', place) + 1;
    if (place == 0) throw (CdcException ("Bad time format."));
    sec = atoi (time.Mid (place, 2).GetBuffer ());

    place = time.Find (' ', place) + 1;
    if (place == 0) throw (CdcException ("Bad time format."));
    year = atoi (time.Mid (place, 4).GetBuffer ());

    if (day < 1 || day > 31 ||
        month < 1 || month > 12 ||
        year < 1970 || year > 2038 ||
        hour < 0 || hour > 23 ||
        min < 0 || min > 59 ||
        sec < 0 || sec > 59)
        throw (CdcException ("Bad time format."));

    return CdcHttpTime (year, month, day, hour, min, sec);
}


int CdcHttpTime::GetMonthNumber (const CdcString& str)
{
    int num = 0;
    num = oMap [str];
    return num;
}


void CdcHttpTime::Init ()
{
    oMap ["Jan"] = 1;
    oMap ["Feb"] = 2;
    oMap ["Mar"] = 3;
    oMap ["Apr"] = 4;
    oMap ["May"] = 5;
    oMap ["Jun"] = 6;
    oMap ["Jul"] = 7;
    oMap ["Aug"] = 8;
    oMap ["Sep"] = 9;
    oMap ["Oct"] = 10;
    oMap ["Nov"] = 11;
    oMap ["Dec"] = 12;

    /* Set time zone and day light saving. */
    //tzset ();
}