/* Various routines to perform simple actions.
 *
 * (C) 2003-2014 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. 
 * 
 *
 */

#include "services.h"

/*************************************************************************/

/**
 * Note a bad password attempt for the given user.  If they've used up
 * their limit, toss them off.
 * @param u the User to check
 * @return void
 */
void bad_password(User * u)
{
    time_t now = time(NULL);

    if (!u || !BadPassLimit) {
        return;
    }

    if (BadPassTimeout > 0 && u->invalid_pw_time > 0
        && u->invalid_pw_time < now - BadPassTimeout)
        u->invalid_pw_count = 0;
    u->invalid_pw_count++;
    u->invalid_pw_time = now;
    if (u->invalid_pw_count >= BadPassLimit) {
        kill_user(NULL, u->nick, "Too many invalid passwords");
    }
}

/*************************************************************************/

/**
 * Remove a user from the IRC network.
 * @param source is the nick which should generate the kill, or NULL for a server-generated kill.
 * @param user to remove
 * @param reason for the kill
 * @return void
 */
void kill_user(char *source, char *user, char *reason)
{
    char buf[BUFSIZE];

    if (!user || !*user) {
        return;
    }
    if (!source || !*source) {
        source = ServerName;
    }
    if (!reason) {
        reason = "";
    }

    snprintf(buf, sizeof(buf), "%s (%s)", source, reason);

    anope_cmd_svskill(source, user, buf);

    if (!ircd->quitonkill && finduser(user)) {
        do_kill(user, buf);
    }
}

/*************************************************************************/

/**
 * Check and enforce SQlines
 * @param mask of the sqline
 * @param reason for the sqline
 * @return void
 */
void sqline(char *mask, char *reason)
{
    int i;
    Channel *c, *next;
    char *av[3];
    struct c_userlist *cu, *cunext;

    if (ircd->chansqline) {
        if (*mask == '#') {
            anope_cmd_sqline(mask, reason);

            for (i = 0; i < 1024; i++) {
                for (c = chanlist[i]; c; c = next) {
                    next = c->next;

                    if (!match_wild_nocase(mask, c->name)) {
                        continue;
                    }
                    for (cu = c->users; cu; cu = cunext) {
                        cunext = cu->next;
                        if (is_oper(cu->user)) {
                            continue;
                        }
                        av[0] = c->name;
                        av[1] = cu->user->nick;
                        av[2] = reason;
                        anope_cmd_kick(s_OperServ, av[0], av[1],
                                       "Q-Lined: %s", av[2]);
                        do_kick(s_ChanServ, 3, av);
                    }
                }
            }
        } else {
            anope_cmd_sqline(mask, reason);
        }
    } else {
        anope_cmd_sqline(mask, reason);
    }
}

/*************************************************************************/

/**
 * Unban the nick from a channel
 * @param ci channel info for the channel
 * @param nick to remove the ban for
 * @param full True to match against realhost
 * @return void
 */
static void _common_unban(ChannelInfo * ci, char *nick, boolean full)
{
    char *av[4];
    char *host = NULL;
    char buf[BUFSIZE];
    int ac;
    uint32 ip = 0;
    User *u;
    Entry *ban, *next;

    if (!ci || !ci->c || !nick) {
        return;
    }

    if (!(u = finduser(nick))) {
        return;
    }

    if (!ci->c->bans || (ci->c->bans->count == 0))
        return;

    if (u->hostip == NULL) {
        host = host_resolve(u->host);
        /* we store the just resolved hostname so we don't
         * need to do this again */
        if (host) {
            u->hostip = sstrdup(host);
        }
    } else {
        host = sstrdup(u->hostip);
    }
    /* Convert the host to an IP.. */
    if (host)
        ip = str_is_ip(host);

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

    for (ban = ci->c->bans->entries; ban; ban = next) {
        next = ban->next;
        if ((full && entry_match(ban, u->nick, u->username, u->host, ip)) ||
            entry_match(ban, u->nick, u->vident, u->vhost, 0) ||
            entry_match(ban, u->nick, u->username, u->chost, 0)) {
            anope_cmd_mode(whosends(ci), ci->name, "-b %s", ban->mask);
            if (ircdcap->tsmode)
                av[3] = sstrdup(ban->mask);
            else
                av[2] = sstrdup(ban->mask);

            do_cmode(whosends(ci), ac, av);

            if (ircdcap->tsmode)
                free(av[3]);
            else
                free(av[2]);
        }
    }

    if (ircdcap->tsmode)
        free(av[2]);
    else
        free(av[1]);

    /* host_resolve() sstrdup us this info so we gotta free it */
    if (host) {
        free(host);
    }
}

void common_unban(ChannelInfo * ci, char *nick)
{
	_common_unban(ci, nick, false);
}

void common_unban_full(ChannelInfo * ci, char *nick, boolean full)
{
	_common_unban(ci, nick, full);
}

/*************************************************************************/

/**
 * Prepare to set SVSMODE and update internal user modes
 * @param u user to apply modes to
 * @param modes the modes to set on the user
 * @param arg the arguments for the user modes
 * @return void
 */
void common_svsmode(User * u, char *modes, char *arg)
{
    int ac = 1;
    char *av[2];

    av[0] = modes;
    if (arg) {
        av[1] = arg;
        ac++;
    }

    anope_cmd_svsmode(u, ac, av);
    anope_set_umode(u, ac, av);
}

/*************************************************************************/

/**
 * Get the vhost for the user, if set else return the host, on ircds without
 * vhost this returns the host
 * @param u user to get the vhost for
 * @return vhost
 */
char *common_get_vhost(User * u)
{
    if (!u)
        return NULL;

    if (u->vhost)
        return u->vhost;
    else if (ircd->vhostmode && (u->mode & ircd->vhostmode) && u->chost)
        return u->chost;
    else
        return u->host;
}

/*************************************************************************/

/**
 * Get the vident for the user, if set else return the ident, on ircds without
 * vident this returns the ident
 * @param u user to get info the vident for
 * @return vident
 */
char *common_get_vident(User * u)
{
    if (!u)
        return NULL;

    if (ircd->vhostmode && (u->mode & ircd->vhostmode))
        return u->vident;
    else if (ircd->vident && u->vident)
        return u->vident;
    else
        return u->username;
}