/*
 * node.C: Data structure management.
 *
 * Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team
 * Rights to this code are as documented in COPYING.
 *
 *
 * Portions of this file were derived from sources bearing the following license:
 * Rights to this code are documented in doc/pod/license.pod.
 * Copyright © 2005-2007 Atheme Project (http://www.atheme.org)
 */

static char const rcsid[] = "$Id: node.C,v 1.7 2007/09/22 14:27:30 pippijn Exp $";

#include <boost/foreach.hpp>

#include "atheme.h"
#include <util/time.h>
#include <util/time.h>
#include <libermyth.h>
#include "servers.h"
#include <account/kline.h>
#include "uplink.h"
#include "privs.h"

kline_t::list_type kline_t::list;

/*************
 * L I S T S *
 *************/

void
init_nodes (void)
{
#if 0
  kline_heap = BlockHeapCreate (sizeof (kline_t), 16);
#endif

  init_uplinks ();
  init_servers ();
  init_accounts ();
  init_users ();
  init_channels ();
  init_privs ();
}

/* Mark everything illegal, to be called before a rehash -- jilles */
void
mark_all_illegal ()
{
  std::vector<soper_t *> soper_mortals;

  foreach (uplink_t *u, uplinks)
    u->flags |= UPF_ILLEGAL;

  /* just delete these, we can survive without for a while */
  foreach (soper_t *soper, soper_t::list)
    if (soper->flags & SOPER_CONF)
      soper_mortals.push_back (soper);

  while (!soper_mortals.empty ())
    {
      soper_delete (soper_mortals.back ());
      soper_mortals.pop_back ();
    }

  /* no sopers pointing to these anymore */
  while (!operclass_t::list.empty ())
    operclass_delete (operclass_t::list.back ());
}

/* Unmark everything illegal, to be called after a failed rehash -- jilles */
void
unmark_all_illegal ()
{
  foreach (uplink_t *u, uplinks)
    u->flags &= ~UPF_ILLEGAL;
}

/* Remove illegal stuff, to be called after a successful rehash -- jilles */
void
remove_illegals ()
{
  std::vector<uplink_t *> mortals;

  foreach (uplink_t *u, uplinks)
    {
      if (u->flags & UPF_ILLEGAL && u != curr_uplink)
        mortals.push_back (u);
    }

  while (!mortals.empty ())
    {
      uplink_delete (mortals.back ());
      mortals.pop_back ();
    }
}

/*************
 * K L I N E *
 *************/

kline_t *
kline_t::create (char const * const user, char const * const host, char const * const reason, long duration)
{
  kline_t *k;
  static unsigned int kcnt = 0;

  slog (LG_DEBUG, "kline_t::create(): %s@%s -> %s (%ld)", user, host, reason, duration);

  k = new kline_t;

  k->user = sstrdup (user);
  k->host = sstrdup (host);
  k->reason = sstrdup (reason);
  k->duration = duration;
  k->settime = NOW;
  k->expires = NOW + duration;
  k->number = ++kcnt;

  list.push_back (k);

  cnt.kline++;

  phandler->kline_sts ("*", user, host, duration, reason);

  return k;
}

void
kline_t::destroy (char const * const user, char const * const host)
{
  kline_t *k = find (user, host);

  if (!k)
    {
      slog (LG_DEBUG, "kline_t::destroy(): called for nonexistant kline: %s@%s", user, host);

      return;
    }

  slog (LG_DEBUG, "kline_t::destroy(): %s@%s -> %s", k->user, k->host, k->reason);
  /* only unkline if ircd has not already removed this -- jilles */
  if (k->duration == 0 || k->expires > NOW)
    phandler->unkline_sts ("*", k->user, k->host);

  k->destroy ();
}

kline_t *
kline_t::find (char const * const user, char const * const host)
{
  kline_t *k;
  list_type::iterator klit = list.begin ();
  list_type::iterator klet = list.end ();

  while (klit != klet)
    {
      k = *klit;
      
      if ((!match (k->user, user)) && (!match (k->host, host)))
        return k;

      ++klit;
    }
  
  return NULL;
}

kline_t *
kline_t::find (unsigned int number)
{
  kline_t *k;
  list_type::iterator klit = list.begin ();
  list_type::iterator klet = list.end ();

  while (klit != klet)
    {
      k = *klit;
      
      if (k->number == number)
        return k;

      ++klit;
    }
  
  return NULL;
}

kline_t *
kline_t::find (user_t *u)
{
  kline_t *k;
  list_type::iterator klit = list.begin ();
  list_type::iterator klet = list.end ();

  while (klit != klet)
    {
      k = *klit;
      
      if (k->duration != 0 && k->expires <= NOW)
        continue;
      if (!match (k->user, u->user) && (!match (k->host, u->host) || !match (k->host, u->ip) || !match_ips (k->host, u->ip)))
        return k;
      ++klit;
    }

  return NULL;
}

void
kline_t::expire (void *arg)
{
  kline_t *k;
  std::vector<kline_t *> mortals;
  list_type::iterator klit = list.begin ();
  list_type::iterator klet = list.end ();

  while (klit != klet)
    {
      k = *klit;
      
      if (k->duration == 0)
        continue;
      
      if (k->expires <= NOW)
        {
          snoop (_("KLINE:EXPIRE: \2%s@%s\2 set \2%s\2 ago by \2%s\2"), k->user, k->host, time_ago (k->settime), k->setby);
          
          verbose_wallops (_("AKILL expired on \2%s@%s\2, set by \2%s\2"), k->user, k->host, k->setby);
          
          mortals.push_back (k);
        }

      ++klit;
    }

  // We have to do this because we cannot destroy klines while iterating
  while (!mortals.empty ())
    {
      mortals.back ()->destroy ();
      mortals.pop_back ();
    }
}