/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(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
 *
 *  $Id$
 */

#include "stdinc.h"
#include "client.h"
#include "modules.h"
#include "numeric.h"
#include "send.h"
#include "conf.h"
#include "ircd.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "parse.h"


static char buf[IRCD_BUFSIZE];

/* dump_map()
 *   dumps server map, called recursively.
 */
static void
dump_map(struct Client *client_p, const struct Client *root_p,
         int start_len, char *pbuf)
{
  int cnt = 0, i = 0, l = 0, len = start_len;
  int users, dashes;
  const dlink_node *ptr = NULL;
  char *pb;

  *pbuf= '\0';
  pb = pbuf;

  l = ircsprintf(pb, "%s", root_p->name);
  pb += l;
  len += l;

  if (root_p->id[0] != '\0')
  {
    l = ircsprintf(pb, "[%s]", root_p->id);
    pb += l;
    len += l;
  }

  *pb++ = ' ';
  len++;
  dashes = 50 - len;

  for (i = 0; i < dashes; i++)
    *pb++ = '-';

  *pb++ = ' ';
  *pb++ = '|';

  users = dlink_list_length(&root_p->serv->client_list);

  sprintf(pb, " Users: %5d (%1.1f%%)", users,
          100 * (float)users / (float)Count.total);

  sendto_one(client_p, form_str(RPL_MAP), me.name, client_p->name, buf);

  if (root_p->serv->server_list.head)
  {
    cnt += dlink_list_length(&root_p->serv->server_list);

    if (cnt)
    {
      if (pbuf > buf + 3)
      {
        pbuf[-2] = ' ';

        if (pbuf[-3] == '`')
          pbuf[-3] = ' ';
      }
    }
  }

  i = 1;

  DLINK_FOREACH(ptr, root_p->serv->server_list.head)
  {
    const struct Client *server_p = ptr->data;

    *pbuf = ' ';

    if (i < cnt)
      *(pbuf + 1) = '|';
    else
      *(pbuf + 1) = '`';

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

/* m_map()
 *      parv[0] = sender prefix
 */
static void
m_map(struct Client *client_p, struct Client *source_p,
      int parc, char *parv[])
{
  static time_t last_used = 0;

  if (ConfigServerHide.flatten_links)
  {
    m_not_oper(client_p, source_p, parc, parv);
    return;
  }

  if ((last_used + ConfigFileEntry.pace_wait) > CurrentTime)
  {
    /* safe enough to give this on a local connect only */
    sendto_one(source_p, form_str(RPL_LOAD2HI),
               me.name, source_p->name);
    return;
  }

  last_used = CurrentTime;

  dump_map(source_p, &me, 0, buf);
  sendto_one(source_p, form_str(RPL_MAPEND), me.name, source_p->name);
}

/* mo_map()
 *      parv[0] = sender prefix
 */
static void
mo_map(struct Client *client_p, struct Client *source_p,
       int parc, char *parv[])
{
  dump_map(source_p, &me, 0, buf);
  sendto_one(source_p, form_str(RPL_MAPEND), me.name, source_p->name);
}

static struct Message map_msgtab = {
  "MAP", 0, 0, 0, MAXPARA, MFLG_SLOW, 0,
  { m_unregistered, m_map, m_ignore, m_ignore, mo_map, m_ignore }
};

static void
module_init(void)
{
  mod_add_cmd(&map_msgtab);
}

static void
module_exit(void)
{
  mod_del_cmd(&map_msgtab);
}

struct module module_entry = {
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = 0
};