/* vi: set ts=2:
 +-------------------+  Christian Schlittchen <corwin@amber.kn-bremen.de>
 |                   |  Enno Rehling <enno@eressea.de>
 | Eressea PBEM host |  Katja Zedel <katze@felidae.kn-bremen.de>
 | (c) 1998 - 2003   |  Henning Peters <faroul@beyond.kn-bremen.de>
 |                   |  Ingo Wilken <Ingo.Wilken@informatik.uni-oldenburg.de>
 +-------------------+  Stefan Reich <reich@halbling.de>

 This program may not be used, modified or distributed 
 without prior permission by the authors of Eressea.
*/
#include <platform.h>
#include <kernel/config.h>
#include "unguard.h"

/* kernel includes */
#include <util/attrib.h>
#include <kernel/building.h>
#include <kernel/region.h>
#include <kernel/unit.h>

/* util includes */
#include <util/attrib.h>
#include <util/event.h>
#include <util/log.h>
#include <util/resolve.h>

/* libc includes */
#include <stdlib.h>

static int unguard_handle(trigger * t, void *data)
{
  building *b = (building *) t->data.v;

  if (b) {
    fset(b, BLD_UNGUARDED);
  } else {
    log_error("could not perform unguard::handle()\n");
    return -1;
  }
  unused_arg(data);
  return 0;
}

static void unguard_write(const trigger * t, struct storage *store)
{
  write_building_reference((building *) t->data.v, store);
}

static int unguard_read(trigger * t, struct storage *store)
{
  int rb =
    read_reference(&t->data.v, store, read_building_reference,
    resolve_building);
  if (rb == 0 && !t->data.v) {
    return AT_READ_FAIL;
  }
  return AT_READ_OK;
}

struct trigger_type tt_unguard = {
  "building",
  NULL,
  NULL,
  unguard_handle,
  unguard_write,
  unguard_read
};

trigger *trigger_unguard(building * b)
{
  trigger *t = t_new(&tt_unguard);
  t->data.v = (void *)b;
  return t;
}