/*****************************************************************************
 *
 * $Id$
 * Purpose ...............: Utilities for message handling.
 *
 *****************************************************************************
 * Copyright (C) 1997-2002
 *   
 * Michiel Broek		FIDO:		2:280/2802
 * Beekmansbos 10
 * 1971 BV IJmuiden
 * the Netherlands
 *
 * This file is part of MBSE BBS.
 *
 * This BBS 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, or (at your option) any
 * later version.
 *
 * MBSE BBS 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 MBSE BBS; see the file COPYING.  If not, write to the Free
 * Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *****************************************************************************/

#include "../config.h"
#include "../lib/libs.h"
#include "../lib/memwatch.h"
#include "../lib/mbse.h"
#include "../lib/structs.h"
#include "../lib/users.h"
#include "../lib/records.h"
#include "../lib/common.h"
#include "../lib/clcomm.h"
#include "../lib/msgtext.h"
#include "../lib/msg.h"
#include "oneline.h"
#include "msgutil.h"



int	BaseWrite = FALSE;

static char *wdays[]={(char *)"Sun",(char *)"Mon",(char *)"Tue",(char *)"Wed",
		      (char *)"Thu",(char *)"Fri",(char *)"Sat"};

static char *months[]={(char *)"Jan",(char *)"Feb",(char *)"Mar",
		       (char *)"Apr",(char *)"May",(char *)"Jun",
		       (char *)"Jul",(char *)"Aug",(char *)"Sep",
		       (char *)"Oct",(char *)"Nov",(char *)"Dec"};



char *rfcdate(time_t now)
{
	static char	buf[40];
	struct tm	ptm, gtm;
	char		sign;
	int		hr, min;
	long		offset;

	if (!now) 
		now = time(NULL);
	ptm = *localtime(&now);

	/*
	 * To get the timezone, compare localtime with GMT.
	 */
	gtm = *gmtime(&now);

	/*
	 * Assume we are never more than 24 hours away.
	 */
	offset = gtm.tm_yday - ptm.tm_yday;
	if (offset > 1)
	    offset = -24;
	else if (offset < -1)
	    offset = 24;
	else
	    offset *= 24;

	/*
	 * Scale in the hours and minutes; ignore seconds.
	 */
	offset += gtm.tm_hour - ptm.tm_hour;
	offset *= 60;
	offset += gtm.tm_min - ptm.tm_min;

	if (offset <= 0)
	{
		sign='+';
		offset=-offset;
	}
	else sign='-';
	hr=offset/60L;
	min=offset%60L;

	sprintf(buf,"%s, %02d %s %04d %02d:%02d:%02d %c%02d%02d",
		wdays[gtm.tm_wday],gtm.tm_mday,months[gtm.tm_mon],
		gtm.tm_year+1900,gtm.tm_hour,gtm.tm_min,gtm.tm_sec,
		sign,hr,min);
	return(buf);
}



/*
 *  Open specified message base for read or write.
 */
int Open_Msgbase(char *Base, int Mode)
{
	BaseWrite = FALSE;

	if (!Msg_Open(Base))
		return FALSE;

	if (Mode != 'w')
		return TRUE;

	if (!Msg_Lock(30L)) {
		Msg_Close();
		return FALSE;
	}

	BaseWrite = TRUE;
	return TRUE;
}



/*
 *  Close current messagebase.
 */
void Close_Msgbase()
{
	if (BaseWrite) {
		Msg_UnLock();
		BaseWrite = FALSE;
	}
	Msg_Close();
}



void Add_Headkludges(faddr *dest, int IsReply)
{
	char		*temp, *temp2;
	unsigned long	crc = -1;
	time_t		tt;
	int		i;
	faddr		*Node;

	temp = calloc(128, sizeof(char));

	switch (msgs.Type) {
		case LOCALMAIL:	Msg.Localmail = TRUE;
				break;

		case NETMAIL:	Msg.Netmail = TRUE;
				sprintf(Msg.FromAddress, "%s", aka2str(msgs.Aka));
				sprintf(Msg.ToAddress, "%s", ascfnode(dest, 0x1f));

				if (msgs.Aka.point) {
					sprintf(temp, "\001FMPT %d", msgs.Aka.point);
					MsgText_Add2(temp);
				}

				if (dest->point) {
					sprintf(temp, "\001TOPT %d", dest->point);
					MsgText_Add2(temp);
				}

				sprintf(temp, "\001INTL %d:%d/%d %d:%d/%d", dest->zone, dest->net, dest->node, msgs.Aka.zone, msgs.Aka.net, msgs.Aka.node);
				MsgText_Add2(temp);

				break;

		case LIST:	Msg.Echomail = TRUE;
				sprintf(Msg.FromAddress, "%s", aka2str(msgs.Aka));
				break;

		case ECHOMAIL:	Msg.Echomail = TRUE;
				sprintf(Msg.FromAddress, "%s", aka2str(msgs.Aka));
				break;

		case NEWS:	/*
				 * Header style is the same as GoldED does.
				 */
				Msg.News = TRUE;
				sprintf(temp, "\001Date: %s", rfcdate(Msg.Written));
				MsgText_Add2(temp);
				Node = fido2faddr(msgs.Aka);
				temp2 = xstrcpy(Msg.From);
				for (i = 0; i < strlen(temp2); i++)
					if (temp2[i] == ' ')
						temp2[i] = '_';
				sprintf(temp, "\001From: %s@%s (%s)", temp2, ascinode(Node, 0x2f), Msg.From);
				MsgText_Add2(temp);
				sprintf(temp, "\001Subject: %s", Msg.Subject);
				MsgText_Add2(temp);
				sprintf(temp, "\001Sender: %s@%s (%s)", temp2, ascinode(Node, 0x2f), Msg.From);
				MsgText_Add2(temp);
				free(temp2);
				tidy_faddr(Node);
				MsgText_Add2((char *)"\001To: All");
				MsgText_Add2((char *)"\001MIME-Version: 1.0");
				MsgText_Add2((char *)"\001Content-Type: text/plain");
				MsgText_Add2((char *)"\001Content-Transfer-Encoding: 8bit");
				sprintf(temp, "\001X-Mailreader: MBSE BBS %s", VERSION);
				MsgText_Add2(temp);
				break;
	}

	sprintf(temp, "\001CHRS: %s", getchrs(msgs.Ftncode));
	MsgText_Add2(temp);
	sprintf(temp, "\001MSGID: %s %08lx", aka2str(msgs.Aka), sequencer());
	MsgText_Add2(temp);
	Msg.MsgIdCRC = upd_crc32(temp, crc, strlen(temp));

	if (IsReply) {
		sprintf(temp, "\001REPLY: %s", Msg.Replyid);
		MsgText_Add2(temp);
		crc = -1;
		Msg.ReplyCRC = upd_crc32(temp, crc, strlen(temp));
	} else
		Msg.ReplyCRC = 0xffffffff;

	sprintf(temp, "\001PID: MBSE-BBS %s", VERSION);
	MsgText_Add2(temp);
	tt = time(NULL);
	sprintf(temp, "\001TZUTC: %s", gmtoffset(tt));
	MsgText_Add2(temp);
	free(temp);
}



/*
 *  Add bottom message kludges. The flag Quote is false if this is called
 *  from Offline Reader, the user then may or may have not added a quote.
 */
void Add_Footkludges(int Quote, char *tear)
{
	char	*temp;
	char	*aka;
	FILE	*fp;

	temp = calloc(PATH_MAX, sizeof(char));
	aka  = calloc(32,  sizeof(char));

	/*
	 * If Quote (message entered at the bbs) we append a signature.
	 */
	if (Quote) {
	    sprintf(temp, "%s/%s/.signature", CFG.bbs_usersdir, exitinfo.Name);
	    if ((fp = fopen(temp, "r"))) {
		Syslog('m', "  Add .signature");
		MsgText_Add2((char *)"");
		while (fgets(temp, 80, fp)) {
		    Striplf(temp);
		    MsgText_Add2(temp);
		}
		fclose(fp);
		MsgText_Add2((char *)"");
	    }
	}
	
	if (msgs.Quotes && Quote) {
		Syslog('m', "  Add quote");
		sprintf(temp, "... %s", Oneliner_Get());
		MsgText_Add2(temp);
		MsgText_Add2((char *)"");
	}

	/*
	 * The offline reader may override the tearline
	 */
	if (tear == NULL) {
	    MsgText_Add2(TearLine());
	} else {
	    sprintf(temp, "--- %s", tear);
	    MsgText_Add2(temp);
	}

	if ((msgs.Type == ECHOMAIL) || (msgs.Type == LIST)) {
		/* RANDOM ORIGIN LINES IMPLEMENTEREN */
		if (msgs.Aka.point)
			sprintf(aka, "(%d:%d/%d.%d)", msgs.Aka.zone, msgs.Aka.net, msgs.Aka.node, msgs.Aka.point);
		else
			sprintf(aka, "(%d:%d/%d)", msgs.Aka.zone, msgs.Aka.net, msgs.Aka.node);

		if (strlen(msgs.Origin))
			sprintf(temp, " * Origin: %s %s", msgs.Origin, aka);
		else
			sprintf(temp, " * Origin: %s %s", CFG.origin, aka);
		MsgText_Add2(temp);
	}

	free(aka);
	free(temp);
}