/*
  *   IRC - Internet Relay Chat, src/modules/names.c
  *   (C) 2006 The UnrealIRCd Team
  *
  *   See file AUTHORS in IRC package for additional names of
  *   the programmers.
  *
  *   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 1, or (at your option)
  *   any later version.
  *
  *   This program 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 this program; if not, write to the Free Software
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "unrealircd.h"
 
 CMD_FUNC(cmd_names);
 
 long CAP_MULTI_PREFIX = 0L;
 long CAP_USERHOST_IN_NAMES = 0L;
 
 #define MSG_NAMES 	"NAMES"
 
 ModuleHeader MOD_HEADER
   = {
 	"names",
 	"5.0",
 	"command /names", 
 	"UnrealIRCd Team",
 	"unrealircd-6",
     };
 
 MOD_INIT()
 {
 	ClientCapabilityInfo c;
 	memset(&c, 0, sizeof(c));
 	c.name = "multi-prefix";
 	ClientCapabilityAdd(modinfo->handle, &c, &CAP_MULTI_PREFIX);
 	memset(&c, 0, sizeof(c));
 	c.name = "userhost-in-names";
 	ClientCapabilityAdd(modinfo->handle, &c, &CAP_USERHOST_IN_NAMES);
 
 	CommandAdd(modinfo->handle, MSG_NAMES, cmd_names, MAXPARA, CMD_USER|CMD_SERVER);
 	MARK_AS_OFFICIAL_MODULE(modinfo);
 	return MOD_SUCCESS;
 }
 
 MOD_LOAD()
 {
 	return MOD_SUCCESS;
 }
 
 MOD_UNLOAD()
 {
 	return MOD_SUCCESS;
 }
 
 /************************************************************************
  * cmd_names() - Added by Jto 27 Apr 1989
  * 12 Feb 2000 - geesh, time for a rewrite -lucas
  ************************************************************************/
 
 /*
 ** cmd_names
 **	parv[1] = channel
 */
 #define TRUNCATED_NAMES 64
 CMD_FUNC(cmd_names)
 {
 	int multiprefix = (MyConnect(client) && HasCapabilityFast(client, CAP_MULTI_PREFIX));
 	int uhnames = (MyConnect(client) && HasCapabilityFast(client, CAP_USERHOST_IN_NAMES)); // cache UHNAMES support
 	int bufLen = NICKLEN + (!uhnames ? 0 : (1 + USERLEN + 1 + HOSTLEN));
 	int mlen = strlen(me.name) + bufLen + 7;
 	Channel *channel;
 	Client *acptr;
 	int member;
 	Member *cm;
 	int idx, flag = 1, spos;
 	const char *para = parv[1], *s;
 	char nuhBuffer[NICKLEN+USERLEN+HOSTLEN+3];
 	char buf[BUFSIZE];
 
 	if (parc < 2 || !MyConnect(client))
 	{
 		sendnumeric(client, RPL_ENDOFNAMES, "*");
 		return;
 	}
 
 	for (s = para; *s; s++)
 	{
 		if (*s == ',')
 		{
 			sendnumeric(client, ERR_TOOMANYTARGETS, s+1, 1, "NAMES");
 			return;
 		}
 	}
 
 	channel = find_channel(para);
 
 	if (!channel || (!ShowChannel(client, channel) && !ValidatePermissionsForPath("channel:see:names:secret",client,NULL,channel,NULL)))
 	{
 		sendnumeric(client, RPL_ENDOFNAMES, para);
 		return;
 	}
 
 	/* cache whether this user is a member of this channel or not */
 	member = IsMember(client, channel);
 
 	// FIXME: consider rewriting this whole thing to get rid of pointer juggling and stuff.
 
 	if (PubChannel(channel))
 		buf[0] = '=';
 	else if (SecretChannel(channel))
 		buf[0] = '@';
 	else
 		buf[0] = '*';
 
 	idx = 1;
 	buf[idx++] = ' ';
 	for (s = channel->name; *s; s++)
 		buf[idx++] = *s;
 	buf[idx++] = ' ';
 	buf[idx++] = ':';
 
 	/* If we go through the following loop and never add anything,
 	   we need this to be empty, otherwise spurious things from the
 	   LAST /names call get stuck in there.. - lucas */
 	buf[idx] = '\0';
 
 	spos = idx;		/* starting point in buffer for names! */
 
 	for (cm = channel->members; cm; cm = cm->next)
 	{
 		acptr = cm->client;
 		if (IsInvisible(acptr) && !member && !ValidatePermissionsForPath("channel:see:names:invisible",client,acptr,channel,NULL))
 			continue;
 
 		if (!user_can_see_member(client, acptr, channel))
 			continue; /* invisible (eg: due to delayjoin) */
 
 		if (!multiprefix)
 		{
 			/* Standard NAMES reply (single character) */
 			char c = mode_to_prefix(*cm->member_modes);
 			if (c)
 				buf[idx++] = c;
 		} else {
 			/* NAMES reply with all rights included (multi-prefix / NAMESX) */
 			strcpy(&buf[idx], modes_to_prefix(cm->member_modes));
 			idx += strlen(&buf[idx]);
 		}
 
 		if (!uhnames) {
 			s = acptr->name;
 		} else {
 			strlcpy(nuhBuffer,
 			        make_nick_user_host(acptr->name, acptr->user->username, GetHost(acptr)),
 				bufLen + 1);
 			s = nuhBuffer;
 		}
 		/* 's' is intialized above to point to either acptr->name (normal),
 		 * or to nuhBuffer (for UHNAMES).
 		 */
 		for (; *s; s++)
 			buf[idx++] = *s;
 		if (cm->next)
 			buf[idx++] = ' ';
 		buf[idx] = '\0';
 		flag = 1;
 		if (mlen + idx + bufLen + MEMBERMODESLEN >= BUFSIZE - 1)
 		{
 			sendnumeric(client, RPL_NAMREPLY, buf);
 			idx = spos;
 			flag = 0;
 		}
 	}
 
 	if (flag)
 		sendnumeric(client, RPL_NAMREPLY, buf);
 
 	sendnumeric(client, RPL_ENDOFNAMES, para);
 }

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