/*
 *  Charybdis: an advanced Internet Relay Chat Daemon(ircd).
 *  m_omode.c: allows oper mode hacking
 *
 *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
 *  Copyright (C) 1996-2002 Hybrid Development Team
 *  Copyright (C) 2002-2004 ircd-ratbox development team
 *  Copyright (C) 2006 Charybdis development team
 *
 *  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.
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 */

#include "stdinc.h"
#include "channel.h"
#include "client.h"
#include "hash.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "s_user.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "s_serv.h"
#include "send.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "packet.h"

static int mo_omode(struct Client *, struct Client *, int, const char **);

struct Message omode_msgtab = {
    "OMODE", 0, 0, 0, MFLG_SLOW,
    {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_omode, 3}}
};

mapi_clist_av1 omode_clist[] = { &omode_msgtab, NULL };

DECLARE_MODULE_AV1(omode, NULL, NULL, omode_clist, NULL, NULL, "$Revision: 3121 $");

/*
 * mo_omode - MODE command handler
 * parv[1] - channel
 */
static int
mo_omode(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
    struct Channel *chptr = NULL;
    struct membership *msptr;
    char params[512];
    int i;
    int wasonchannel;

    /* admins only */
    if(!IsOperAdmin(source_p)) {
        sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "admin");
        return 0;
    }

    /* Now, try to find the channel in question */
    if(!IsChanPrefix(parv[1][0]) || !check_channel_name(parv[1])) {
        sendto_one_numeric(source_p, ERR_BADCHANNAME,
                           form_str(ERR_BADCHANNAME), parv[1]);
        return 0;
    }

    chptr = find_channel(parv[1]);

    if(chptr == NULL) {
        sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
                           form_str(ERR_NOSUCHCHANNEL), parv[1]);
        return 0;
    }

    /* Now know the channel exists */
    msptr = find_channel_membership(chptr, source_p);
    wasonchannel = msptr != NULL;

    if (is_any_op(msptr)) {
        sendto_one_notice(source_p, ":Use a normal MODE you idiot");
        return 0;
    }

    params[0] = '\0';
    for (i = 2; i < parc; i++) {
        if (i != 2)
            rb_strlcat(params, " ", sizeof params);
        rb_strlcat(params, parv[i], sizeof params);
    }

    sendto_wallops_flags(UMODE_WALLOP, &me,
                         "OMODE called for [%s] [%s] by %s!%s@%s",
                         parv[1], params, source_p->name, source_p->username, source_p->host);
    ilog(L_MAIN, "OMODE called for [%s] [%s] by %s",
         parv[1], params, get_oper_name(source_p));

    if(*chptr->chname != '&')
        sendto_server(NULL, NULL, NOCAPS, NOCAPS,
                      ":%s WALLOPS :OMODE called for [%s] [%s] by %s!%s@%s",
                      me.name, parv[1], params, source_p->name, source_p->username,
                      source_p->host);

#if 0
    set_channel_mode(client_p, source_p->servptr, chptr, msptr,
                     parc - 2, parv + 2);
#else
    if (parc == 4 && !strcmp(parv[2], "+y") && !irccmp(parv[3], source_p->name)) {
        /* Ownering themselves */
        if (!wasonchannel) {
            sendto_one_numeric(source_p, ERR_USERNOTINCHANNEL,
                               form_str(ERR_USERNOTINCHANNEL), parv[3], chptr->chname);
            return 0;
        }
        sendto_channel_local(ALL_MEMBERS, chptr, ":%s MODE %s +y %s",
                             me.name, parv[1], source_p->name);
        sendto_server(NULL, chptr, CAP_TS6, NOCAPS,
                      ":%s TMODE %ld %s +y %s",
                      me.id, (long) chptr->channelts, parv[1],
                      source_p->id);
        msptr->flags |= CHFL_OWNER;
    } else if (parc == 4 && !strcmp(parv[2], "+a") && !irccmp(parv[3], source_p->name)) {
        /* Admining themselves */
        if (!wasonchannel) {
            sendto_one_numeric(source_p, ERR_USERNOTINCHANNEL,
                               form_str(ERR_USERNOTINCHANNEL), parv[3], chptr->chname);
            return 0;
        }
        sendto_channel_local(ALL_MEMBERS, chptr, ":%s MODE %s +a %s",
                             me.name, parv[1], source_p->name);
        sendto_server(NULL, chptr, CAP_TS6, NOCAPS,
                      ":%s TMODE %ld %s +a %s",
                      me.id, (long) chptr->channelts, parv[1],
                      source_p->id);
        msptr->flags |= CHFL_ADMIN;
    } else if (parc == 4 && !strcmp(parv[2], "+o") && !irccmp(parv[3], source_p->name)) {
        /* Opping themselves */
        if (!wasonchannel) {
            sendto_one_numeric(source_p, ERR_USERNOTINCHANNEL,
                               form_str(ERR_USERNOTINCHANNEL), parv[3], chptr->chname);
            return 0;
        }
        sendto_channel_local(ALL_MEMBERS, chptr, ":%s MODE %s +o %s",
                             me.name, parv[1], source_p->name);
        sendto_server(NULL, chptr, CAP_TS6, NOCAPS,
                      ":%s TMODE %ld %s +o %s",
                      me.id, (long) chptr->channelts, parv[1],
                      source_p->id);
        msptr->flags |= CHFL_CHANOP;
    } else if (parc == 4 && !strcmp(parv[2], "+h") && !irccmp(parv[3], source_p->name)) {
        /* Halfopping themselves */
        if (!wasonchannel) {
            sendto_one_numeric(source_p, ERR_USERNOTINCHANNEL,
                               form_str(ERR_USERNOTINCHANNEL), parv[3], chptr->chname);
            return 0;
        }
        sendto_channel_local(ALL_MEMBERS, chptr, ":%s MODE %s +h %s",
                             me.name, parv[1], source_p->name);
        sendto_server(NULL, chptr, CAP_TS6, NOCAPS,
                      ":%s TMODE %ld %s +h %s",
                      me.id, (long) chptr->channelts, parv[1],
                      source_p->id);
        msptr->flags |= CHFL_HALFOP;
    } else if (ConfigChannel.use_owner) {
        /* I hope this is correct.
         * -- Kabaka */

        /* Hack it so set_channel_mode() will accept */
        if (wasonchannel)
            msptr->flags |= CHFL_OWNER;
        else {
            add_user_to_channel(chptr, source_p, CHFL_CHANOP);
            msptr = find_channel_membership(chptr, source_p);
        }
        set_channel_mode(client_p, source_p, chptr, msptr,
                         parc - 2, parv + 2);
        if (wasonchannel)
            msptr->flags &= ~CHFL_OWNER;
        else
            remove_user_from_channel(msptr);
    } else if (ConfigChannel.use_admin) {
        /* Hack it so set_channel_mode() will accept */
        if (wasonchannel)
            msptr->flags |= CHFL_ADMIN;
        else {
            add_user_to_channel(chptr, source_p, CHFL_CHANOP);
            msptr = find_channel_membership(chptr, source_p);
        }
        set_channel_mode(client_p, source_p, chptr, msptr,
                         parc - 2, parv + 2);
        /* We know they were not opped before and they can't have opped
         * themselves as set_channel_mode() does not allow that
         * -- jilles */
        if (wasonchannel)
            msptr->flags &= ~CHFL_ADMIN;
        else
            remove_user_from_channel(msptr);
    } else {
        /* CHFL_ADMIN is only useful if admin is enabled
         * so hack it with op if it is not. */
        if (wasonchannel)
            msptr->flags |= CHFL_CHANOP;
        else {
            add_user_to_channel(chptr, source_p, CHFL_CHANOP);
            msptr = find_channel_membership(chptr, source_p);
        }
        set_channel_mode(client_p, source_p, chptr, msptr,
                         parc - 2, parv + 2);
        /* We know they were not opped before and they can't have opped
         * themselves as set_channel_mode() does not allow that
         * -- jilles */
        if (wasonchannel)
            msptr->flags &= ~CHFL_CHANOP;
        else
            remove_user_from_channel(msptr);
    }
#endif
    return 0;
}