/*
 *  ircd-ratbox: A slightly useful ircd.
 *  m_map.c: Sends an Undernet compatible map to a user.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  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 "client.h"
#include "modules.h"
#include "numeric.h"
#include "send.h"
#include "s_conf.h"
#include "scache.h"

#define USER_COL       50	/* display | Users: %d at col 50 */

static int m_map(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
static int mo_map(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);

struct Message map_msgtab = {
    "MAP", 0, 0, 0, MFLG_SLOW,
    {mg_unreg, {m_map, 0}, mg_ignore, mg_ignore, mg_ignore, {mo_map, 0}}
};

mapi_clist_av1 map_clist[] = { &map_msgtab, NULL };
DECLARE_MODULE_AV1(map, NULL, NULL, map_clist, NULL, NULL, "$Revision: 3368 $");

static void dump_map(struct Client *client_p, struct Client *root, char *pbuf);

static char buf[BUFSIZE];

/* m_map
*/
static int
m_map(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
    if((!IsExemptShide(source_p) && ConfigServerHide.flatten_links) ||
       ConfigFileEntry.map_oper_only) {
        m_not_oper(client_p, source_p, parc, parv);
        return 0;
    }

    dump_map(client_p, &me, buf);
    sendto_one_numeric(client_p, RPL_MAPEND, form_str(RPL_MAPEND));
    return 0;
}

/*
** mo_map
*/
static int
mo_map(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
    dump_map(client_p, &me, buf);
    scache_send_missing(client_p);
    sendto_one_numeric(client_p, RPL_MAPEND, form_str(RPL_MAPEND));

    return 0;
}

/*
** dump_map
**   dumps server map, called recursively.
*/
static void
dump_map(struct Client *client_p, struct Client *root_p, char *pbuf)
{
    int cnt = 0, i = 0, len, frac;
    struct Client *server_p;
    rb_dlink_node *ptr;
    *pbuf = '\0';

    rb_strlcat(pbuf, root_p->name, BUFSIZE);
    if (has_id(root_p)) {
        rb_strlcat(pbuf, "[", BUFSIZE);
        rb_strlcat(pbuf, root_p->id, BUFSIZE);
        rb_strlcat(pbuf, "]", BUFSIZE);
    }
    len = strlen(buf);
    buf[len] = ' ';

    if(len < USER_COL) {
        for (i = len + 1; i < USER_COL; i++) {
            buf[i] = '-';
        }
    }

    frac = (1000 * rb_dlink_list_length(&root_p->serv->users) + Count.total / 2) / Count.total;
    rb_snprintf(buf + USER_COL, BUFSIZE - USER_COL,
                " | Users: %5lu (%2d.%1d%%)", rb_dlink_list_length(&root_p->serv->users),
                frac / 10, frac % 10);

    sendto_one_numeric(client_p, RPL_MAP, form_str(RPL_MAP), buf);

    if(root_p->serv->servers.head != NULL) {
        cnt += rb_dlink_list_length(&root_p->serv->servers);

        if(cnt) {
            if(pbuf > buf + 3) {
                pbuf[-2] = ' ';
                if(pbuf[-3] == '`')
                    pbuf[-3] = ' ';
            }
        }
    }
    i = 1;
    RB_DLINK_FOREACH(ptr, root_p->serv->servers.head) {
        server_p = ptr->data;
        *pbuf = ' ';
        if(i < cnt)
            *(pbuf + 1) = '|';
        else
            *(pbuf + 1) = '`';

        *(pbuf + 2) = '-';
        *(pbuf + 3) = ' ';
        dump_map(client_p, server_p, pbuf + 4);

        i++;
    }
}
