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 /*
 *   Unreal Internet Relay Chat Daemon, src/modules/m_whois.c
 *   (C) 2000-2001 Carsten V. Munk and the UnrealIRCd Team
 *   Moved to modules by Fish (Justin Hammond)
 *
 *   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 "config.h"
#include "struct.h"
#include "common.h"
#include "sys.h"
#include "numeric.h"
#include "msg.h"
#include "channel.h"
#include <time.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
#include <io.h>
#endif
#include <fcntl.h>
#include "h.h"
#include "proto.h"
#ifdef STRIPBADWORDS
#include "badwords.h"
#endif
#ifdef _WIN32
#include "version.h"
#endif
static char buf[BUFSIZE];
DLLFUNC int m_whois(aClient *cptr, aClient *sptr, int parc, char *parv[]);
/* Place includes here */
#define MSG_WHOIS       "WHOIS" /* WHOI */
#define TOK_WHOIS       "#"     /* 35 */
ModuleHeader MOD_HEADER(m_whois)
  = {
    "whois",    /* Name of module */
    "$Id: m_whois.c,v 1.1.6.12 2009/04/13 11:04:37 syzop Exp $", /* Version */
    "command /whois", /* Short description of module */
    "3.2-b8-1",
    NULL 
    };
/* This is called on module init, before Server Ready */
DLLFUNC int MOD_INIT(m_whois)(ModuleInfo *modinfo)
{
    /*
     * We call our add_Command crap here
    */
    add_Command(MSG_WHOIS, TOK_WHOIS, m_whois, MAXPARA);
    MARK_AS_OFFICIAL_MODULE(modinfo);
    return MOD_SUCCESS;
}
/* Is first run when server is 100% ready */
DLLFUNC int MOD_LOAD(m_whois)(int module_load)
{
    return MOD_SUCCESS;
}
/* Called when module is unloaded */
DLLFUNC int MOD_UNLOAD(m_whois)(int module_unload)
{
    if (del_Command(MSG_WHOIS, TOK_WHOIS, m_whois) < 0)
    {
        sendto_realops("Failed to delete commands when unloading %s",
                MOD_HEADER(m_whois).name);
    }
    return MOD_SUCCESS;
}
/*
** m_whois
**    parv[0] = sender prefix
**    parv[1] = nickname masklist
*/
DLLFUNC int  m_whois(aClient *cptr, aClient *sptr, int parc, char *parv[])
{
    Membership *lp;
    anUser *user;
    aClient *acptr, *a2cptr;
    aChannel *chptr;
    char *nick, *tmp, *name;
    char *p = NULL;
    int  found, len, mlen, cnt = 0;
    char querybuf[BUFSIZE];
    if (IsServer(sptr))    
        return 0;
    if (parc < 2)
    {
        sendto_one(sptr, err_str(ERR_NONICKNAMEGIVEN),
            me.name, parv[0]);
        return 0;
    }
    if (parc > 2)
    {
        if (hunt_server_token(cptr, sptr, MSG_WHOIS, TOK_WHOIS, "%s :%s", 1, parc,
            parv) != HUNTED_ISME)
            return 0;
        parv[1] = parv[2];
    }
    strcpy(querybuf, parv[1]);
    for (tmp = canonize(parv[1]); (nick = strtoken(&p, tmp, ",")); tmp = NULL)
    {
        unsigned char invis, showchannel, member, wilds, hideoper; /* <- these are all boolean-alike */
        if (++cnt > MAXTARGETS)
            break;
        found = 0;
        /* We do not support "WHOIS *" */
        wilds = (index(nick, '?') || index(nick, '*'));
        if (wilds)
            continue;
        if ((acptr = find_client(nick, NULL)))
        {
            if (IsServer(acptr))
                continue;
            /*
             * I'm always last :-) and acptr->next == NULL!!
             */
            if (IsMe(acptr))
                break;
            /*
             * 'Rules' established for sending a WHOIS reply:
             * - only send replies about common or public channels
             *   the target user(s) are on;
             */
            if (!IsPerson(acptr))
                continue;
            user = acptr->user;
            name = (!*acptr->name) ? "?" : acptr->name;
            invis = acptr != sptr && IsInvisible(acptr);
            member = (user->channel) ? 1 : 0;
            a2cptr = find_server_quick(user->server);
            hideoper = 0;
            if (IsHideOper(acptr) && (acptr != sptr) && !IsAnOper(sptr))
                hideoper = 1;
            if (IsWhois(acptr) && (sptr != acptr))
            {
                sendto_one(acptr,
                    ":%s %s %s :*** %s (%s@%s) did a /whois on you.",
                    me.name, IsWebTV(acptr) ? "PRIVMSG" : "NOTICE", acptr->name, sptr->name,
                    sptr->user->username, sptr->user->realhost);
            }
            sendto_one(sptr, rpl_str(RPL_WHOISUSER), me.name,
                parv[0], name,
                user->username,
                IsHidden(acptr) ? user->virthost : user->realhost,
                acptr->info);
            if (IsOper(sptr))
            {
                char sno[512];
                strcpy(sno, get_sno_str(acptr));
                
                /* send the target user's modes */
                sendto_one(sptr, rpl_str(RPL_WHOISMODES),
                    me.name, parv[0], name,
                    get_mode_str(acptr), sno[1] == 0 ? "" : sno);
            }
            if ((acptr == sptr) || IsAnOper(sptr))
            {
                sendto_one(sptr, rpl_str(RPL_WHOISHOST),
                    me.name, parv[0], acptr->name,
                    (MyConnect(acptr) && strcmp(acptr->username, "unknown")) ? acptr->username : "*",
                    user->realhost, user->ip_str ? user->ip_str : "");
            }
            if (IsARegNick(acptr))
                sendto_one(sptr, rpl_str(RPL_WHOISREGNICK), me.name, parv[0], name);
            
            found = 1;
            mlen = strlen(me.name) + strlen(parv[0]) + 10 + strlen(name);
            for (len = 0, *buf = '\0', lp = user->channel; lp; lp = lp->next)
            {
                chptr = lp->chptr;
                showchannel = 0;
                if (ShowChannel(sptr, chptr))
                    showchannel = 1;
                if (OPCanSeeSecret(sptr))
                    showchannel = 1;
                if ((acptr->umodes & UMODE_HIDEWHOIS) && !IsMember(sptr, chptr) && !IsAnOper(sptr))
                    showchannel = 0;
                if (IsServices(acptr) && !IsNetAdmin(sptr) && !IsSAdmin(sptr))
                    showchannel = 0;
                if (acptr == sptr)
                    showchannel = 1;
                /* Hey, if you are editting here... don't forget to change the webtv w_whois ;p. */
                if (showchannel)
                {
                    long access;
                    if (len + strlen(chptr->chname) > (size_t)BUFSIZE - 4 - mlen)
                    {
                        sendto_one(sptr,
                            ":%s %d %s %s :%s",
                            me.name,
                            RPL_WHOISCHANNELS,
                            parv[0], name, buf);
                        *buf = '\0';
                        len = 0;
                    }
#ifdef SHOW_SECRET
                    if (IsAnOper(sptr)
#else
                    if (IsNetAdmin(sptr)
#endif
                        && SecretChannel(chptr) && !IsMember(sptr, chptr))
                        *(buf + len++) = '?';
                    if (acptr->umodes & UMODE_HIDEWHOIS && !IsMember(sptr, chptr)
                        && IsAnOper(sptr))
                        *(buf + len++) = '!';
                    access = get_access(acptr, chptr);
#ifdef PREFIX_AQ
                    if (access & CHFL_CHANOWNER)
                        *(buf + len++) = '~';
                    else if (access & CHFL_CHANPROT)
                        *(buf + len++) = '&';
                    else
#endif
                    if (access & CHFL_CHANOP)
                        *(buf + len++) = '@';
                    else if (access & CHFL_HALFOP)
                        *(buf + len++) = '%';
                    else if (access & CHFL_VOICE)
                        *(buf + len++) = '+';
                    if (len)
                        *(buf + len) = '\0';
                    (void)strcpy(buf + len, chptr->chname);
                    len += strlen(chptr->chname);
                    (void)strcat(buf + len, " ");
                    len++;
                }
            }
            if (buf[0] != '\0')
                sendto_one(sptr, rpl_str(RPL_WHOISCHANNELS), me.name, parv[0], name, buf); 
                        if (!(IsULine(acptr) && !IsOper(sptr) && HIDE_ULINES))
                sendto_one(sptr, rpl_str(RPL_WHOISSERVER),
                    me.name, parv[0], name, user->server,
                    a2cptr ? a2cptr->info : "*Not On This Net*");
            if (user->away)
                sendto_one(sptr, rpl_str(RPL_AWAY), me.name,
                    parv[0], name, user->away);
            /* makesure they aren't +H (we'll also check
               before we display a helpop or IRCD Coder msg)
               -- codemastr */
            if ((IsAnOper(acptr) || IsServices(acptr)) && !hideoper)
            {
                buf[0] = '\0';
                if (IsNetAdmin(acptr))
                    strlcat(buf, "a Network Administrator", sizeof buf);
                else if (IsSAdmin(acptr))
                    strlcat(buf, "a Services Administrator", sizeof buf);
                else if (IsAdmin(acptr) && !IsCoAdmin(acptr))
                    strlcat(buf, "a Server Administrator", sizeof buf);
                else if (IsCoAdmin(acptr))
                    strlcat(buf, "a Co Administrator", sizeof buf);
                else if (IsServices(acptr))
                    strlcat(buf, "a Network Service", sizeof buf);
                else if (IsOper(acptr))
                    strlcat(buf, "an IRC Operator", sizeof buf);
                else
                    strlcat(buf, "a Local IRC Operator", sizeof buf);
                if (buf[0])
                    sendto_one(sptr,
                        rpl_str(RPL_WHOISOPERATOR), me.name,
                        parv[0], name, buf);
            }
            if (IsHelpOp(acptr) && !hideoper && !user->away)
                sendto_one(sptr, rpl_str(RPL_WHOISHELPOP), me.name, parv[0], name);
            if (acptr->umodes & UMODE_BOT)
                sendto_one(sptr, rpl_str(RPL_WHOISBOT), me.name, parv[0], name, ircnetwork);
            if (acptr->umodes & UMODE_SECURE)
                sendto_one(sptr, rpl_str(RPL_WHOISSECURE), me.name, parv[0], name,
                    "is using a Secure Connection");
            if (!BadPtr(user->swhois) && !hideoper)
                    sendto_one(sptr, ":%s %d %s %s :%s",
                        me.name, RPL_WHOISSPECIAL, parv[0],
                        name, acptr->user->swhois);
            /*
             * Fix /whois to not show idle times of
             * global opers to anyone except another
             * global oper or services.
             * -CodeM/Barubary
             */
            if (MyConnect(acptr) && (IsOper(sptr) || (acptr->user && MyConnect(acptr) && !IsOper(acptr))))
            sendto_one(sptr, rpl_str(RPL_WHOISIDLE),
                me.name, parv[0], name,
                TStime() - acptr->last, acptr->firsttime);
           }
        if (!found)
            sendto_one(sptr, err_str(ERR_NOSUCHNICK),
                me.name, parv[0], nick);
    }
    sendto_one(sptr, rpl_str(RPL_ENDOFWHOIS), me.name, parv[0], querybuf);
    return 0;
}