//  This may look like C code, but it is really -*- C++ -*-

//  ------------------------------------------------------------------
//  The Goldware Library
//  Copyright (C) 1990-1999 Odinn Sorensen
//  ------------------------------------------------------------------
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Library General Public
//  License as published by the Free Software Foundation; either
//  version 2 of the License, or (at your option) any later version.
//
//  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 program; if not, write to the Free
//  Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
//  MA 02111-1307, USA
//  ------------------------------------------------------------------
//  $Id$
//  ------------------------------------------------------------------
//  WildCat! 4.x messagebase engine.
//  ------------------------------------------------------------------

#include <gdbgerr.h>
#include <gmemdbg.h>
#include <gdbgtrk.h>
#include <gmowcat.h>


//  ------------------------------------------------------------------

WCatWide* wcatwide = NULL;
WCatData* wcatdata = NULL;
int       wcatdatano = 0;

//  ------------------------------------------------------------------

WCatHdr::WCatHdr()
    : magicnumber(0)
    , msgno(0)
    , fromuserid(0)
    , touserid(0)
    , msgdate(0)
    , msgtime(0)
    , readdate(0)
    , readtime(0)
    , mflags(0)
    , reference(0)
    , origaddr()
    , destaddr()
    , msgbytes(0)
    , prevunread(0)
    , nextunread(0)
    , fidoflags(0)
    , cost(0)
{
    from[0] = NUL;
    fromtitle[0] = NUL;
    to[0] = NUL;
    totitle[0] = NUL;
    subject[0] = NUL;
    network[0] = NUL;
    internalattach[0] = NUL;
    externalattach[0] = NUL;
    reserved[0] = NUL;
}

//  ------------------------------------------------------------------

void WCatArea::data_open()
{

    wide = wcatwide;
    data = wcatdata + (wcatdatano++);
}


//  ------------------------------------------------------------------

void WCatArea::data_close()
{

    wcatdatano--;
}


//  ------------------------------------------------------------------

void WCatArea::raw_close()
{

    GFTRK("WCatRawClose");

    if(data->fhix != -1)   ::close(data->fhix);
    data->fhix = -1;
    if(data->fhdat != -1)  ::close(data->fhdat);
    data->fhdat = -1;

    GFTRK(0);
}


//  ------------------------------------------------------------------

int WCatArea::test_open(const char* __file)
{

    GFTRK("WCatTestOpen");

    int _fh;
    long _tries = 0;

    do
    {

        _fh = ::sopen(__file, O_RDWR|O_BINARY|O_CREAT, WideSharemode, S_STDRW);
        if(_fh == -1)
        {

            // Tell the world
            if((errno != EACCES) or (PopupLocked(++_tries, false, __file) == false))
            {

                // User requested to exit
                WideLog->ErrOpen();
                raw_close();
                WideLog->printf("! A WildCat! msgbase file could not be opened.");
                WideLog->printf(": %s.", __file);
                WideLog->ErrOSInfo();
                OpenErrorExit();
            }
        }
    }
    while(_fh == -1);

    // Remove the popup window
    if(_tries)
        PopupLocked(0, 0, NULL);

    GFTRK(0);

    return _fh;
}


//  ------------------------------------------------------------------

void WCatArea::raw_open()
{

    GFTRK("WCatRawOpen");

    data->fhix  = test_open(AddPath(real_path(), ".ix"));
    data->fhdat = test_open(AddPath(real_path(), ".dat"));

    GFTRK(0);
}


//  ------------------------------------------------------------------

void WCatExit()
{

    throw_xrelease(wcatwide);
    throw_xrelease(wcatdata);
}


//  ------------------------------------------------------------------

void WCatInit(int userno)
{

    wcatdata = (WCatData*)throw_calloc(3, sizeof(WCatData));
    wcatwide = (WCatWide*)throw_calloc(1, sizeof(WCatWide));

    wcatwide->userno = userno;
}


//  ------------------------------------------------------------------

void WCatArea::open()
{

    GFTRK("WCatOpen");

    isopen++;
    if(isopen > 2)
    {
        WideLog->ErrTest();
        WideLog->printf("! Trying to open a WildCat! msgbase more than twice.");
        WideLog->printf(": %s, %s.", echoid(), path());
        WideLog->printf("+ Info: This indicates a serious bug.");
        WideLog->printf("+ Advice: Report to the Author immediately.");
        TestErrorExit();
    }
    if(isopen == 1)
    {
        if(ispacked())
        {
            isopen--;
            const char* newpath = Unpack(path());
            if(newpath == NULL)
                packed(false);
            set_real_path(newpath ? newpath : path());
            isopen++;
        }
        data_open();
        raw_open();
        refresh();
        scan();
    }

    GFTRK(0);
}


//  ------------------------------------------------------------------

void WCatArea::save_lastread()
{

    GFTRK("WCatSaveLastread");

    int _fh = ::sopen(AddPath(real_path(), ".lrd"), O_RDWR|O_CREAT|O_BINARY, WideSharemode, S_STDRW);
    if(_fh != -1)
    {
        word _lastread = (word)Msgn->CvtReln(lastread);
        lseekset(_fh, wcatwide->userno, sizeof(word));
        write(_fh, &_lastread, sizeof(word));
        ::close(_fh);
    }

    GFTRK(0);
}


//  ------------------------------------------------------------------

void WCatArea::close()
{

    GFTRK("WCatClose");

    if(isopen)
    {
        if(isopen == 1)
        {
            save_lastread();
            raw_close();
            Msgn->Reset();
            throw_release(data->idx);
            data_close();
            if(ispacked())
            {
                CleanUnpacked(real_path());
            }
        }
        isopen--;
    }
    else
    {
        WideLog->ErrTest();
        WideLog->printf("! Trying to close an already closed WildCat! msgbase.");
        WideLog->printf(": %s, %s.", echoid(), path());
        WideLog->printf("+ Info: This indicates a potentially serious bug.");
        WideLog->printf("+ Advice: Report to the Author immediately.");
        TestErrorExit();
    }

    GFTRK(0);
}


//  ------------------------------------------------------------------

void WCatArea::suspend()
{

    GFTRK("WCatSuspend");

    save_lastread();

    GFTRK(0);
}


//  ------------------------------------------------------------------

void WCatArea::resume()
{

    GFTRK("WCatResume");



    GFTRK(0);
}


//  ------------------------------------------------------------------
