/* Synchronet message retrieval functions */

/* $Id$ */
// vi: tabstop=4

/****************************************************************************
 * @format.tab-size 4		(Plain Text/Source Code File Header)			*
 * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
 *																			*
 * Copyright Rob Swindell - http://www.synchro.net/copyright.html			*
 *																			*
 * 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.					*
 * See the GNU General Public License for more details: gpl.txt or			*
 * http://www.fsf.org/copyleft/gpl.html										*
 *																			*
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 * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net	*
 *																			*
 * Anonymous CVS access to the development source and modification history	*
 * is available at cvs.synchro.net:/cvsroot/sbbs, example:					*
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 *     (just hit return, no password is necessary)							*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src		*
 *																			*
 * For Synchronet coding style and modification guidelines, see				*
 * http://www.synchro.net/source.html										*
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 * Note: If this box doesn't appear square, then you need to fix your tabs.	*
 ****************************************************************************/

/***********************************************************************/
/* Functions that do i/o with messages (posts/mail/auto) or their data */
/***********************************************************************/

#include "sbbs.h"
#include "utf8.h"
#include "unicode.h"
#include "cp437defs.h"

/****************************************************************************/
/* Loads an SMB message from the open msg base the fastest way possible 	*/
/* first by offset, and if that's the wrong message, then by number.        */
/* Returns >=0 if the message was loaded and left locked, otherwise < 0.	*/
/* !WARNING!: If you're going to write the msg index back to disk, you must */
/* Call this function with a msg->idx.offset of 0 (so msg->offset will be	*/
/* initialized correctly)													*/
/****************************************************************************/
int sbbs_t::loadmsg(smbmsg_t *msg, ulong number)
{
	char str[128];
	int i;

	if(msg->idx.offset) {				/* Load by offset if specified */

		if((i=smb_lockmsghdr(&smb,msg)) != SMB_SUCCESS) {
			errormsg(WHERE,ERR_LOCK,smb.file,i,smb.last_error);
			return i;
		}

		i=smb_getmsghdr(&smb,msg);
		if(i==SMB_SUCCESS) {
			if(msg->hdr.number==number)
				return msg->total_hfields;
			/* Wrong offset  */
			smb_freemsgmem(msg);
		}

		smb_unlockmsghdr(&smb,msg);
	}

	msg->hdr.number=number;
	if((i=smb_getmsgidx(&smb,msg))!=SMB_SUCCESS)				 /* Message is deleted */
		return i;
	if((i=smb_lockmsghdr(&smb,msg))!=SMB_SUCCESS) {
		errormsg(WHERE,ERR_LOCK,smb.file,i,smb.last_error);
		return i;
	}
	if((i=smb_getmsghdr(&smb,msg))!=SMB_SUCCESS) {
		SAFEPRINTF4(str,"(%06" PRIX32 ") #%" PRIu32 "/%lu %s",msg->idx.offset,msg->idx.number
			,number,smb.file);
		smb_unlockmsghdr(&smb,msg);
		errormsg(WHERE,ERR_READ,str,i,smb.last_error);
		return i;
	}
	return msg->total_hfields;
}

/* Synchronized with atcode()! */
void sbbs_t::show_msgattr(smbmsg_t* msg)
{
	uint16_t attr = msg->hdr.attr;
	uint16_t poll = attr&MSG_POLL_VOTE_MASK;
	uint32_t auxattr = msg->hdr.auxattr;
	uint32_t netattr = msg->hdr.netattr;

	bprintf(text[MsgAttr]
		,attr&MSG_PRIVATE	? "Private  "   :nulstr
		,attr&MSG_SPAM		? "SPAM  "      :nulstr
		,attr&MSG_READ		? "Read  "      :nulstr
		,attr&MSG_DELETE	? "Deleted  "   :nulstr
		,attr&MSG_KILLREAD	? "Kill  "      :nulstr
		,attr&MSG_ANONYMOUS ? "Anonymous  " :nulstr
		,attr&MSG_LOCKED	? "Locked  "    :nulstr
		,attr&MSG_PERMANENT ? "Permanent  " :nulstr
		,attr&MSG_MODERATED ? "Moderated  " :nulstr
		,attr&MSG_VALIDATED ? "Validated  " :nulstr
		,attr&MSG_REPLIED	? "Replied  "	:nulstr
		,attr&MSG_NOREPLY	? "NoReply  "	:nulstr
		,poll == MSG_POLL	? "Poll  "		:nulstr
		,poll == MSG_POLL && auxattr&POLL_CLOSED ? "(Closed)  "	:nulstr
		,auxattr&(MSG_FILEATTACH|MSG_MIMEATTACH) ? "Attach  "   :nulstr
		,netattr&MSG_SENT						 ? "Sent  "		:nulstr
		,netattr&MSG_INTRANSIT					 ? "InTransit  ":nulstr
		);
}

/* Returns a CP437 text.dat string converted to UTF-8, when appropriate */
const char* sbbs_t::msghdr_text(const smbmsg_t* msg, uint index)
{
	if(msg == NULL || !(msg->hdr.auxattr & MSG_HFIELDS_UTF8))
		return text[index];

	if(cp437_to_utf8_str(text[index], msghdr_utf8_text, sizeof(msghdr_utf8_text), /* min-char-val: */'\x80') < 1)
		return text[index];

	return msghdr_utf8_text;
}

// Returns a CP437 version of a message header field or UTF-8 if can_utf8 is true
// Doesn't do CP437->UTF-8 conversion
const char* sbbs_t::msghdr_field(const smbmsg_t* msg, const char* str, char* buf, bool can_utf8)
{
	if(msg == NULL || !(msg->hdr.auxattr & MSG_HFIELDS_UTF8))
		return str;

	if(can_utf8 && term_supports(UTF8))
		return str;

	if(buf == NULL)
		buf = msgghdr_field_cp437_str;

	strncpy(buf, str, sizeof(msgghdr_field_cp437_str));
	utf8_normalize_str(buf);
	utf8_replace_chars(buf, unicode_to_cp437
		,/* unsupported char: */CP437_INVERTED_QUESTION_MARK
		,/* unsupported zero-width ch: */0
		,/* decode error char: */CP437_INVERTED_EXCLAMATION_MARK);

	return buf;
}

/****************************************************************************/
/* Displays a message header to the screen                                  */
/****************************************************************************/
void sbbs_t::show_msghdr(smb_t* smb, smbmsg_t* msg, const char* subject, const char* from, const char* to)
{
	char	str[MAX_PATH+1];
	char	age[64];
	char	*sender=NULL;
	int 	i;
	smb_t	saved_smb = this->smb;
	long	pmode = 0;

	if(smb != NULL)
		this->smb = *smb;	// Needed for @-codes and JS bbs.smb_* properties
	if(msg != NULL) {
		current_msg = msg;		// Needed for @-codes and JS bbs.msg_* properties
		current_msg_subj = msg->subj;
		current_msg_from = msg->from;
		current_msg_to = msg->to;
		if(msg->hdr.auxattr & MSG_HFIELDS_UTF8)
			pmode |= P_UTF8;
	}
	if(subject != NULL)
		current_msg_subj = subject;
	if(from != NULL)
		current_msg_from = from;
	if(to != NULL)
		current_msg_to = to;

	attr(LIGHTGRAY);
	if(!tos) {
		if(useron.misc&CLRSCRN)
			outchar(FF);
		else
			CRLF;
	}
	msghdr_tos = tos;
	if(!menu("msghdr", P_NOERROR)) {
		bprintf(pmode, msghdr_text(msg, MsgSubj), current_msg_subj);
		if(msg->tags && *msg->tags)
			bprintf(text[MsgTags], msg->tags);
		if(msg->hdr.attr || msg->hdr.netattr || (msg->hdr.auxattr & ~MSG_HFIELDS_UTF8))
			show_msgattr(msg);
		if(current_msg_to != NULL && *current_msg_to != 0) {
			bprintf(pmode, msghdr_text(msg, MsgTo), current_msg_to);
			if(msg->to_net.addr!=NULL)
				bprintf(text[MsgToNet],smb_netaddrstr(&msg->to_net,str));
			if(msg->to_ext)
				bprintf(text[MsgToExt],msg->to_ext);
		}
		if(msg->cc_list != NULL)
			bprintf(text[MsgCarbonCopyList], msg->cc_list);
		if(current_msg_from != NULL && (!(msg->hdr.attr&MSG_ANONYMOUS) || SYSOP)) {
			bprintf(pmode, msghdr_text(msg, MsgFrom), current_msg_from);
			if(msg->from_ext)
				bprintf(text[MsgFromExt],msg->from_ext);
			if(msg->from_net.addr!=NULL && (current_msg_from == NULL || strchr(current_msg_from,'@')==NULL))
				bprintf(text[MsgFromNet],smb_netaddrstr(&msg->from_net,str));
		}
		if(!(msg->hdr.attr&MSG_POLL) && (msg->upvotes || msg->downvotes))
			bprintf(text[MsgVotes]
				,msg->upvotes, msg->user_voted==1 ? text[PollAnswerChecked] : nulstr
				,msg->downvotes, msg->user_voted==2 ? text[PollAnswerChecked] : nulstr
				,msg->upvotes - msg->downvotes);
		bprintf(text[MsgDate]
			,timestr(msg->hdr.when_written.time)
			,smb_zonestr(msg->hdr.when_written.zone,NULL)
			,age_of_posted_item(age, sizeof(age), msg->hdr.when_written.time - (smb_tzutc(msg->hdr.when_written.zone) * 60)));
		bputs(text[MsgHdrBodySeparator]);
	}
	for(i=0;i<msg->total_hfields;i++) {
		if(msg->hfield[i].type==SENDER)
			sender=(char *)msg->hfield_dat[i];
		if(msg->hfield[i].type==FORWARDED && sender)
			bprintf(text[ForwardedFrom],sender
				,timestr(*(time32_t *)msg->hfield_dat[i]));
	}
	this->smb = saved_smb;
	current_msg_subj = NULL;
	current_msg_from = NULL;
	current_msg_to = NULL;
}

/****************************************************************************/
/* Displays message header and text (if not deleted)                        */
/****************************************************************************/
bool sbbs_t::show_msg(smb_t* smb, smbmsg_t* msg, long p_mode, post_t* post)
{
	char*	txt;

	if((msg->hdr.type == SMB_MSG_TYPE_NORMAL && post != NULL && (post->upvotes || post->downvotes))
		|| msg->hdr.type == SMB_MSG_TYPE_POLL)
		msg->user_voted = smb_voted_already(smb, msg->hdr.number
					,cfg.sub[smb->subnum]->misc&SUB_NAME ? useron.name : useron.alias, NET_NONE, NULL);

	show_msghdr(smb, msg);

	if(msg->hdr.type == SMB_MSG_TYPE_POLL && post != NULL && smb->subnum < cfg.total_subs) {
		char* answer;
		int longest_answer = 0;

		int comments=0;
		for(int i = 0; i < msg->total_hfields; i++)
			if(msg->hfield[i].type == SMB_COMMENT) {
				bprintf("%s\r\n", (char*)msg->hfield_dat[i]);
				comments++;
			}
		if(comments)
			CRLF;

		for(int i = 0; i < msg->total_hfields; i++) {
			if(msg->hfield[i].type != SMB_POLL_ANSWER)
				continue;
			answer = (char*)msg->hfield_dat[i];
			int len = strlen(answer);
			if(len > longest_answer)
				longest_answer = len;
		}
		unsigned answers = 0;
		for(int i = 0; i < msg->total_hfields; i++) {
			if(msg->hfield[i].type != SMB_POLL_ANSWER)
				continue;
			answer = (char*)msg->hfield_dat[i];
			float pct = post->total_votes ? ((float)post->votes[answers] / post->total_votes)*100.0F : 0.0F;
			char str[128];
			int width = longest_answer;
			if(width < cols/3) width = cols/3;
			else if(width > cols-20)
				width = cols-20;
			bprintf(text[PollAnswerNumber], answers+1);
			bool results_visible = false;
			if((msg->hdr.auxattr&POLL_RESULTS_MASK) == POLL_RESULTS_OPEN)
				results_visible = true;
			else if((msg->from_net.type == NET_NONE && sub_op(smb->subnum))
				|| smb_msg_is_from(msg, cfg.sub[smb->subnum]->misc&SUB_NAME ? useron.name : useron.alias, NET_NONE, NULL))
				results_visible = true;
			else if((msg->hdr.auxattr&POLL_RESULTS_MASK) == POLL_RESULTS_CLOSED)
				results_visible = (msg->hdr.auxattr&POLL_CLOSED) ? true : false;
			else if((msg->hdr.auxattr&POLL_RESULTS_MASK) != POLL_RESULTS_SECRET)
				results_visible = msg->user_voted ? true : false;
			if(results_visible) {
				safe_snprintf(str, sizeof(str), text[PollAnswerFmt]
					,width, width, answer, post->votes[answers], pct);
				backfill(str, pct, cfg.color[clr_votes_full], cfg.color[clr_votes_empty]);
				if(msg->user_voted&(1<<answers))
					bputs(text[PollAnswerChecked]);
			} else {
				attr(cfg.color[clr_votes_empty]);
				bputs(answer);
			}
			CRLF;
			answers++;
		}
		if(!msg->user_voted && !(useron.misc&EXPERT) && !(msg->hdr.auxattr&POLL_CLOSED) && !(useron.rest&FLAG('V')))
			mnemonics(text[VoteInThisPollNow]);
		return true;
	}
	if((txt=smb_getmsgtxt(smb, msg, 0)) == NULL)
		return false;
	char* p = txt;
	if(!(console&CON_RAW_IN)) {
		if(strstr(txt, "\x1b[") == NULL)	// Don't word-wrap raw ANSI text
			p_mode|=P_WORDWRAP;
		p = smb_getplaintext(msg, txt);
		if(p == NULL)
			p = txt;
		else
			bprintf(text[MIMEDecodedPlainTextFmt]
				, msg->text_charset == NULL ? "unspecified (US-ASCII)" : msg->text_charset
				, msg->text_subtype);
	}
	truncsp(p);
	SKIP_CRLF(p);
	if(smb_msg_is_utf8(msg)) {
		if(!term_supports(UTF8))
			utf8_normalize_str(txt);
		p_mode |= P_UTF8;
	}
	if(smb->subnum < cfg.total_subs) {
		p_mode |= cfg.sub[smb->subnum]->pmode;
		p_mode &= ~cfg.sub[smb->subnum]->n_pmode;
	}
	putmsg(p, p_mode, msg->columns);
	smb_freemsgtxt(txt);
	if(column)
		CRLF;
	if((txt=smb_getmsgtxt(smb,msg,GETMSGTXT_TAIL_ONLY))==NULL)
		return false;

	putmsg(txt, p_mode&(~P_WORDWRAP));
	smb_freemsgtxt(txt);
	return true;
}

void sbbs_t::download_msg_attachments(smb_t* smb, smbmsg_t* msg, bool del)
{
	char str[256];
	char fpath[MAX_PATH+1];
	char* txt;
	int attachment_index = 0;
	bool found = true;
	while((txt=smb_getmsgtxt(smb, msg, 0)) != NULL && found) {
		char filename[MAX_PATH+1] = {0};
		uint32_t filelen = 0;
		uint8_t* filedata;
		if((filedata = smb_getattachment(msg, txt, filename, sizeof(filename), &filelen, attachment_index++)) != NULL
			&& filename[0] != 0 && filelen > 0) {
			char tmp[32];
			SAFEPRINTF2(str, text[DownloadAttachedFileQ], filename, ultoac(filelen,tmp));
			if(!noyes(str)) {
				SAFEPRINTF2(fpath, "%s%s", cfg.temp_dir, filename);
				FILE* fp = fopen(fpath, "wb");
				if(fp == NULL)
					errormsg(WHERE, ERR_OPEN, fpath, 0);
				else {
					int result = fwrite(filedata, filelen, 1, fp);
					fclose(fp);
					if(!result)
						errormsg(WHERE, ERR_WRITE, fpath, filelen);
					else
						sendfile(fpath, useron.prot, "attachment");
				}
			}
		} else
			found = false;
		smb_freemsgtxt(txt);
	}

	if(msg->hdr.auxattr&MSG_FILEATTACH) {  /* Attached file */
		char subj[FIDO_SUBJ_LEN];
		smb_getmsgidx(smb, msg);
		SAFECOPY(subj, msg->subj);					/* filenames (multiple?) in title */
		char *p,*tp,ch;
		tp=subj;
		while(online) {
			p=strchr(tp,' ');
			if(p) *p=0;
			tp=getfname(tp);
			file_t	fd;
			fd.dir=cfg.total_dirs+1;			/* temp dir for file attachments */
			padfname(tp,fd.name);
			SAFEPRINTF3(fpath,"%sfile/%04u.in/%s"  /* path is path/fname */
				,cfg.data_dir, msg->idx.to, tp);
			if(!fexistcase(fpath) && msg->idx.from)
				SAFEPRINTF3(fpath,"%sfile/%04u.out/%s"  /* path is path/fname */
					,cfg.data_dir, msg->idx.from,tp);
			long length=(long)flength(fpath);
			if(length<1)
				bprintf(text[FileDoesNotExist], tp);
			else if(!(useron.exempt&FLAG('T')) && cur_cps && !SYSOP
				&& length/(long)cur_cps>(time_t)timeleft)
				bputs(text[NotEnoughTimeToDl]);
			else {
				char 	tmp[512];
				int		i;
				SAFEPRINTF2(str, text[DownloadAttachedFileQ]
					,getfname(fpath),ultoac(length,tmp));
				if(length>0L && text[DownloadAttachedFileQ][0] && yesno(str)) {
					{	/* Remote User */
						xfer_prot_menu(XFER_DOWNLOAD);
						mnemonics(text[ProtocolOrQuit]);
						strcpy(str,"Q");
						for(i=0;i<cfg.total_prots;i++)
							if(cfg.prot[i]->dlcmd[0]
								&& chk_ar(cfg.prot[i]->ar,&useron,&client)) {
								sprintf(tmp,"%c",cfg.prot[i]->mnemonic);
								strcat(str,tmp);
							}
						ch=(char)getkeys(str,0);
						for(i=0;i<cfg.total_prots;i++)
							if(cfg.prot[i]->dlcmd[0] && ch==cfg.prot[i]->mnemonic
								&& chk_ar(cfg.prot[i]->ar,&useron,&client))
								break;
						if(i<cfg.total_prots) {
							int error = protocol(cfg.prot[i], XFER_DOWNLOAD, fpath, nulstr, false);
							if(checkprotresult(cfg.prot[i],error,&fd)) {
								if(del)
									remove(fpath);
								logon_dlb+=length;	/* Update stats */
								logon_dls++;
								useron.dls=(ushort)adjustuserrec(&cfg,useron.number
									,U_DLS,5,1);
								useron.dlb=adjustuserrec(&cfg,useron.number
									,U_DLB,10,length);
								bprintf(text[FileNBytesSent]
									,fd.name,ultoac(length,tmp));
								SAFEPRINTF(str
									,"downloaded attached file: %s"
									,fd.name);
								logline("D-",str);
							}
							autohangup();
						}
					}
				}
			}
			if(!p)
				break;
			tp=p+1;
			while(*tp==' ') tp++;
		}
		// Remove the *.in directory, only if its empty
		SAFEPRINTF2(fpath, "%sfile/%04u.in", cfg.data_dir, msg->idx.to);
		rmdir(fpath);
	}
}

/****************************************************************************/
/* Writes message header and text data to a text file						*/
/****************************************************************************/
bool sbbs_t::msgtotxt(smb_t* smb, smbmsg_t* msg, const char *fname, bool header, ulong gettxt_mode)
{
	char	*buf;
	char	tmp[128];
	int 	i;
	FILE	*out;

	if((out=fnopen(&i,fname,O_WRONLY|O_CREAT|O_APPEND))==NULL) {
		errormsg(WHERE,ERR_OPEN,fname,0);
		return false;
	}
	if(header) {
		fprintf(out,"\r\n");
		fprintf(out,"Subj : %s\r\n",msg->subj);
		fprintf(out,"To   : %s",msg->to);
		if(msg->to_net.addr)
			fprintf(out," (%s)",smb_netaddrstr(&msg->to_net,tmp));
		if(msg->to_ext)
			fprintf(out," #%s",msg->to_ext);
		fprintf(out,"\r\nFrom : %s",msg->from);
		if(msg->from_ext && !(msg->hdr.attr&MSG_ANONYMOUS))
			fprintf(out," #%s",msg->from_ext);
		if(msg->from_net.addr)
			fprintf(out," (%s)",smb_netaddrstr(&msg->from_net,tmp));
		fprintf(out,"\r\nDate : %.24s %s"
			,timestr(msg->hdr.when_written.time)
			,smb_zonestr(msg->hdr.when_written.zone,NULL));
		fprintf(out,"\r\n\r\n");
	}

	bool result = false;
	buf=smb_getmsgtxt(smb, msg, gettxt_mode);
	if(buf!=NULL) {
		strip_invalid_attr(buf);
		fputs(buf,out);
		smb_freemsgtxt(buf);
		result = true;
	} else if(smb_getmsgdatlen(msg)>2)
		errormsg(WHERE,ERR_READ,smb->file,smb_getmsgdatlen(msg));
	fclose(out);
	return result;
}

/****************************************************************************/
/* Returns message number posted at or after time							*/
/****************************************************************************/
ulong sbbs_t::getmsgnum(uint subnum, time_t t)
{
    int			i;
	smb_t		smb;
	idxrec_t	idx;

	if(!t)
		return(0);

	ZERO_VAR(smb);
	SAFEPRINTF2(smb.file,"%s%s",cfg.sub[subnum]->data_dir,cfg.sub[subnum]->code);
	smb.retry_time=cfg.smb_retry_time;
	smb.subnum=subnum;
	if((i=smb_open_index(&smb)) != SMB_SUCCESS) {
		errormsg(WHERE,ERR_OPEN,smb.file,i,smb.last_error);
		return 0;
	}
	int result = smb_getmsgidx_by_time(&smb, &idx, t);
	smb_close(&smb);
	if(result >= SMB_SUCCESS)
		return idx.number - 1;
	return ~0;
}

/****************************************************************************/
/* Returns the time of the message number pointed to by 'ptr'               */
/****************************************************************************/
time_t sbbs_t::getmsgtime(uint subnum, ulong ptr)
{
	int 		i;
	smb_t		smb;
	smbmsg_t	msg;
	idxrec_t	lastidx;

	ZERO_VAR(smb);
	SAFEPRINTF2(smb.file,"%s%s",cfg.sub[subnum]->data_dir,cfg.sub[subnum]->code);
	smb.retry_time=cfg.smb_retry_time;
	smb.subnum=subnum;
	if((i=smb_open(&smb))!=0) {
		errormsg(WHERE,ERR_OPEN,smb.file,i,smb.last_error);
		return(0);
	}
	if(!filelength(fileno(smb.sid_fp))) {			/* Empty base */
		smb_close(&smb);
		return(0);
	}
	msg.offset=0;
	msg.hdr.number=0;
	if(smb_getmsgidx(&smb,&msg)) {				/* Get first message index */
		smb_close(&smb);
		return(0);
	}
	if(!ptr || msg.idx.number>=ptr) {			/* ptr is before first message */
		smb_close(&smb);
		return(msg.idx.time);   				/* so return time of first msg */
	}

	if(smb_getlastidx(&smb,&lastidx)) { 			 /* Get last message index */
		smb_close(&smb);
		return(0);
	}
	if(lastidx.number<ptr) {					/* ptr is after last message */
		smb_close(&smb);
		return(lastidx.time);	 				/* so return time of last msg */
	}

	msg.idx.time=0;
	msg.hdr.number=ptr;
	if(!smb_getmsgidx(&smb,&msg)) {
		smb_close(&smb);
		return(msg.idx.time);
	}

	if(ptr-msg.idx.number < lastidx.number-ptr) {
		msg.offset=0;
		msg.idx.number=0;
		while(msg.idx.number<ptr) {
			msg.hdr.number=0;
			if(smb_getmsgidx(&smb,&msg) || msg.idx.number>=ptr)
				break;
			msg.offset++;
		}
		smb_close(&smb);
		return(msg.idx.time);
	}

	ptr--;
	while(ptr) {
		msg.hdr.number=ptr;
		if(!smb_getmsgidx(&smb,&msg))
			break;
		ptr--;
	}
	smb_close(&smb);
	return(msg.idx.time);
}


/****************************************************************************/
/* Returns the total number of msgs in the sub-board and sets 'ptr' to the  */
/* number of the last message in the sub (0) if no messages.				*/
/****************************************************************************/
ulong sbbs_t::getlastmsg(uint subnum, uint32_t *ptr, time_t *t)
{
	int 		i;
	ulong		total;
	smb_t		smb;
	idxrec_t	idx;

	if(ptr)
		(*ptr)=0;
	if(t)
		(*t)=0;
	if(subnum>=cfg.total_subs)
		return(0);

	ZERO_VAR(smb);
	SAFEPRINTF2(smb.file,"%s%s",cfg.sub[subnum]->data_dir,cfg.sub[subnum]->code);
	smb.retry_time=cfg.smb_retry_time;
	smb.subnum=subnum;
	if((i=smb_open(&smb))!=0) {
		errormsg(WHERE,ERR_OPEN,smb.file,i,smb.last_error);
		return(0);
	}

	if(!filelength(fileno(smb.sid_fp))) {			/* Empty base */
		smb_close(&smb);
		return(0);
	}
	if((i=smb_locksmbhdr(&smb))!=0) {
		smb_close(&smb);
		errormsg(WHERE,ERR_LOCK,smb.file,i,smb.last_error);
		return(0);
	}
	if((i=smb_getlastidx(&smb,&idx))!=0) {
		smb_close(&smb);
		errormsg(WHERE,ERR_READ,smb.file,i,smb.last_error);
		return(0);
	}
	total=(long)filelength(fileno(smb.sid_fp))/sizeof(idxrec_t);
	smb_unlocksmbhdr(&smb);
	smb_close(&smb);
	if(ptr)
		(*ptr)=idx.number;
	if(t)
		(*t)=idx.time;
	return(total);
}