/* ChanServ core functions
 *
 * (C) 2003-2010 Anope Team
 * Contact us at team@anope.org
 *
 * Please read COPYING and README for further details.
 *
 * Based on the original code of Epona by Lara.
 * Based on the original code of Services by Andy Church. 
 * 
 * $Id$
 *
 */
/*************************************************************************/

#include "module.h"

int do_clear(User * u);
void myChanServHelp(User * u);

/**
 * Create the command, and tell anope about it.
 * @param argc Argument count
 * @param argv Argument list
 * @return MOD_CONT to allow the module, MOD_STOP to stop it
 **/
int AnopeInit(int argc, char **argv)
{
    Command *c;

    moduleAddAuthor("Anope");
    moduleAddVersion(VERSION_STRING);
    moduleSetType(CORE);

    c = createCommand("CLEAR", do_clear, NULL, CHAN_HELP_CLEAR, -1, -1, -1,
                      -1);
    moduleAddCommand(CHANSERV, c, MOD_UNIQUE);

    moduleSetChanHelp(myChanServHelp);

    return MOD_CONT;
}

/**
 * Unload the module
 **/
void AnopeFini(void)
{

}



/**
 * Add the help response to anopes /cs help output.
 * @param u The user who is requesting help
 **/
void myChanServHelp(User * u)
{
    notice_lang(s_ChanServ, u, CHAN_HELP_CMD_CLEAR);
}

/**
 * The /cs clear command.
 * @param u The user who issued the command
 * @param MOD_CONT to continue processing other modules, MOD_STOP to stop processing.
 **/
int do_clear(User * u)
{
    char *chan = strtok(NULL, " ");
    char *what = strtok(NULL, " ");
    Channel *c;
    ChannelInfo *ci;

    if (!what) {
        syntax_error(s_ChanServ, u, "CLEAR", CHAN_CLEAR_SYNTAX);
    } else if (!(c = findchan(chan))) {
        notice_lang(s_ChanServ, u, CHAN_X_NOT_IN_USE, chan);
    } else if (!(ci = c->ci)) {
        notice_lang(s_ChanServ, u, CHAN_X_NOT_REGISTERED, chan);
    } else if (ci->flags & CI_VERBOTEN) {
        notice_lang(s_ChanServ, u, CHAN_X_FORBIDDEN, chan);
    } else if (!u || !check_access(u, ci, CA_CLEAR)) {
        notice_lang(s_ChanServ, u, PERMISSION_DENIED);
    } else if (stricmp(what, "bans") == 0) {
        char *av[2];
        Entry *ban, *next;

        if (c->bans && c->bans->count) {
            for (ban = c->bans->entries; ban; ban = next) {
                next = ban->next;
                av[0] = sstrdup("-b");
                av[1] = sstrdup(ban->mask);
                anope_cmd_mode(whosends(ci), chan, "-b %s", ban->mask);
                chan_set_modes(whosends(ci), c, 2, av, 0);
                free(av[0]);
                free(av[1]);
            }
        }

        alog("%s: %s!%s@%s cleared bans on %s",
             s_ChanServ, u->nick, u->username, u->host, ci->name);
        notice_lang(s_ChanServ, u, CHAN_CLEARED_BANS, chan);
    } else if (ircd->except && stricmp(what, "excepts") == 0) {
        char *av[2];
        Entry *except, *next;

        if (c->excepts && c->excepts->count) {
            for (except = c->excepts->entries; except; except = next) {
                next = except->next;
                av[0] = sstrdup("-e");
                av[1] = sstrdup(except->mask);
                anope_cmd_mode(whosends(ci), chan, "-e %s", except->mask);
                chan_set_modes(whosends(ci), c, 2, av, 0);
                free(av[0]);
                free(av[1]);
            }
        }

        alog("%s: %s!%s@%s cleared excepts on %s",
             s_ChanServ, u->nick, u->username, u->host, ci->name);
        notice_lang(s_ChanServ, u, CHAN_CLEARED_EXCEPTS, chan);
    } else if (ircd->invitemode && stricmp(what, "invites") == 0) {
        char *av[2];
        Entry *invite, *next;

        if (c->invites && c->invites->count) {
            for (invite = c->invites->entries; invite; invite = next) {
                next = invite->next;
                av[0] = sstrdup("-I");
                av[1] = sstrdup(invite->mask);
                anope_cmd_mode(whosends(ci), chan, "-I %s", invite->mask);
                chan_set_modes(whosends(ci), c, 2, av, 0);
                free(av[0]);
                free(av[1]);
            }
        }
        alog("%s: %s!%s@%s cleared invites on %s",
             s_ChanServ, u->nick, u->username, u->host, ci->name);
        notice_lang(s_ChanServ, u, CHAN_CLEARED_INVITES, chan);

    } else if (stricmp(what, "modes") == 0) {
        char *argv[2];

        if (c->mode) {
            /* Clear modes the bulk of the modes */
            anope_cmd_mode(whosends(ci), c->name, "%s",
                           ircd->modestoremove);
            argv[0] = sstrdup(ircd->modestoremove);
            chan_set_modes(whosends(ci), c, 1, argv, 0);
            free(argv[0]);

            /* to prevent the internals from complaining send -k, -L, -f by themselves if we need
               to send them - TSL */
            if (c->key) {
                anope_cmd_mode(whosends(ci), c->name, "-k %s", c->key);
                argv[0] = sstrdup("-k");
                argv[1] = c->key;
                chan_set_modes(whosends(ci), c, 2, argv, 0);
                free(argv[0]);
            }
            if (ircd->Lmode && c->redirect) {
                anope_cmd_mode(whosends(ci), c->name, "-L %s",
                               c->redirect);
                argv[0] = sstrdup("-L");
                argv[1] = c->redirect;
                chan_set_modes(whosends(ci), c, 2, argv, 0);
                free(argv[0]);
            }
            if (ircd->fmode && c->flood) {
                if (flood_mode_char_remove) {
                    anope_cmd_mode(whosends(ci), c->name, "%s %s",
                                   flood_mode_char_remove, c->flood);
                    argv[0] = sstrdup(flood_mode_char_remove);
                    argv[1] = c->flood;
                    chan_set_modes(whosends(ci), c, 2, argv, 0);
                    free(argv[0]);
                } else {
                    if (debug) {
                        alog("debug: flood_mode_char_remove was not set unable to remove flood/throttle modes");
                    }
                }
            }
            check_modes(c);
        }

        alog("%s: %s!%s@%s cleared modes on %s",
             s_ChanServ, u->nick, u->username, u->host, ci->name);
        notice_lang(s_ChanServ, u, CHAN_CLEARED_MODES, chan);
    } else if (stricmp(what, "ops") == 0) {
        char *av[6];  /* The max we have to hold: chan, ts, modes(max3), nick, nick, nick */
        int ac, isop, isadmin, isown, count, i;
        char buf[BUFSIZE], tmp[BUFSIZE], tmp2[BUFSIZE];
        struct c_userlist *cu, *next;

        if (ircd->svsmode_ucmode) {
            av[0] = chan;
            anope_cmd_svsmode_chan(av[0], "-o", NULL);
            if (ircd->owner) {
                anope_cmd_svsmode_chan(av[0], ircd->ownerunset, NULL);
            }
            if (ircd->protect || ircd->admin) {
                anope_cmd_svsmode_chan(av[0], ircd->adminunset, NULL);
            }
            /* No need to do anything here - we will receive the mode changes from the IRCd and process them then */
        } else {
            for (cu = c->users; cu; cu = next) {
                next = cu->next;
                isop = chan_has_user_status(c, cu->user, CUS_OP);
                isadmin = chan_has_user_status(c, cu->user, CUS_PROTECT);
                isown = chan_has_user_status(c, cu->user, CUS_OWNER);
                count = (isop ? 1 : 0) + (isadmin ? 1 : 0) + (isown ? 1 : 0);

                if (!isop && !isadmin && !isown)
                    continue;

                snprintf(tmp, BUFSIZE, "-%s%s%s", (isop ? "o" : ""), (isadmin ? 
                        ircd->adminunset+1 : ""), (isown ? ircd->ownerunset+1 : ""));
                /* We need to send the IRCd a nick for every mode.. - Viper */
                snprintf(tmp2, BUFSIZE, "%s %s %s", (isop ? GET_USER(cu->user) : ""), 
                        (isadmin ? GET_USER(cu->user) : ""), (isown ? GET_USER(cu->user) : ""));

                av[0] = chan;
                if (ircdcap->tsmode) {
                    snprintf(buf, BUFSIZE - 1, "%ld", (long int) time(NULL));
                    av[1] = buf;
                    av[2] = tmp;
                    /* We have to give as much nicks as modes.. - Viper */
                    for (i = 0; i < count; i++)
                        av[i+3] = GET_USER(cu->user);
                    ac = 3 + i;

                    anope_cmd_mode(whosends(ci), av[0], "%s %s", av[2], tmp2);
                } else {
                    av[1] = tmp;
                    /* We have to give as much nicks as modes.. - Viper */
                    for (i = 0; i < count; i++)
                        av[i+2] = GET_USER(cu->user);
                    ac = 2 + i;

                    anope_cmd_mode(whosends(ci), av[0], "%s %s", av[1], tmp2);
                }

                do_cmode(s_ChanServ, ac, av);
            }
        }

        alog("%s: %s!%s@%s cleared ops on %s",
             s_ChanServ, u->nick, u->username, u->host, ci->name);
        notice_lang(s_ChanServ, u, CHAN_CLEARED_OPS, chan);
    } else if (ircd->halfop && stricmp(what, "hops") == 0) {
        char *av[4];
        int ac;
        char buf[BUFSIZE];
        struct c_userlist *cu, *next;

        if (ircd->svsmode_ucmode) {
            anope_cmd_svsmode_chan(chan, "-h", NULL);
            /* No need to do anything here - we will receive the mode changes from the IRCd and process them then */
        }
        else {
            for (cu = c->users; cu; cu = next) {
                next = cu->next;
                if (!chan_has_user_status(c, cu->user, CUS_HALFOP))
                    continue;

                if (ircdcap->tsmode) {
                    snprintf(buf, BUFSIZE - 1, "%ld", (long int) time(NULL));
                    av[0] = sstrdup(chan);
                    av[1] = buf;
                    av[2] = sstrdup("-h");
                    av[3] = sstrdup(GET_USER(cu->user));
                    ac = 4;
                } else {
                    av[0] = sstrdup(chan);
                    av[1] = sstrdup("-h");
                    av[2] = sstrdup(GET_USER(cu->user));
                    ac = 3;
                }

                if (ircdcap->tsmode)
                    anope_cmd_mode(whosends(ci), av[0], "%s %s", av[2], av[3]);
                else
                    anope_cmd_mode(whosends(ci), av[0], "%s %s", av[1], av[2]);

                do_cmode(s_ChanServ, ac, av);

                if (ircdcap->tsmode) {
                    free(av[3]);
                    free(av[2]);
                    free(av[0]);
                } else {
                    free(av[2]);
                    free(av[1]);
                    free(av[0]);
                }
            }
        }
        alog("%s: %s!%s@%s cleared halfops on %s",
             s_ChanServ, u->nick, u->username, u->host, ci->name);
        notice_lang(s_ChanServ, u, CHAN_CLEARED_HOPS, chan);
    } else if (stricmp(what, "voices") == 0) {
        char *av[4];
        int ac;
        char buf[BUFSIZE];
        struct c_userlist *cu, *next;

        if (ircd->svsmode_ucmode) {
            anope_cmd_svsmode_chan(chan, "-v", NULL);
	    /* No need to do anything here - we will receive the mode changes from the IRCd and process them then */
	}
	else {
            for (cu = c->users; cu; cu = next) {
                next = cu->next;
                if (!chan_has_user_status(c, cu->user, CUS_VOICE))
                    continue;

                if (ircdcap->tsmode) {
                    snprintf(buf, BUFSIZE - 1, "%ld", (long int) time(NULL));
                    av[0] = sstrdup(chan);
                    av[1] = buf;
                    av[2] = sstrdup("-v");
                    av[3] = sstrdup(GET_USER(cu->user));
                    ac = 4;
                } else {
                    av[0] = sstrdup(chan);
                    av[1] = sstrdup("-v");
                    av[2] = sstrdup(GET_USER(cu->user));
                    ac = 3;
                }

                if (ircdcap->tsmode) {
                    anope_cmd_mode(whosends(ci), av[0], "%s %s", av[2], av[3]);
                } else {
                    anope_cmd_mode(whosends(ci), av[0], "%s %s", av[1], av[2]);
                }

                do_cmode(s_ChanServ, ac, av);

                if (ircdcap->tsmode) {
                    free(av[3]);
                    free(av[2]);
                    free(av[0]);
                } else {
                    free(av[2]);
                    free(av[1]);
                    free(av[0]);
               }
            }
        }
        alog("%s: %s!%s@%s cleared voices on %s",
             s_ChanServ, u->nick, u->username, u->host, ci->name);
        notice_lang(s_ChanServ, u, CHAN_CLEARED_VOICES, chan);
    } else if (stricmp(what, "users") == 0) {
        char *av[3];
        struct c_userlist *cu, *next;
        char buf[256];

        snprintf(buf, sizeof(buf), "CLEAR USERS command from %s", u->nick);

        for (cu = c->users; cu; cu = next) {
            next = cu->next;
            av[0] = sstrdup(chan);
            av[1] = sstrdup(GET_USER(cu->user));
            av[2] = sstrdup(buf);
            anope_cmd_kick(whosends(ci), av[0], av[1], av[2]);
            do_kick(s_ChanServ, 3, av);
            free(av[2]);
            free(av[1]);
            free(av[0]);
        }
        alog("%s: %s!%s@%s cleared users on %s",
             s_ChanServ, u->nick, u->username, u->host, ci->name);
        notice_lang(s_ChanServ, u, CHAN_CLEARED_USERS, chan);
    } else {
        syntax_error(s_ChanServ, u, "CLEAR", CHAN_CLEAR_SYNTAX);
    }
    return MOD_CONT;
}