/*
 * PVVMUD a 3D MUD
 * Copyright (C) 1998-1999  Programvareverkstedet (pvv@pvv.org)
 *
 * 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 "pvvmud.H"
#include "cache.H"

CCache::CCache(){
  cache = new CObjectList();
}

CObject * CCache::failFunc(int id){
  return NULL;
}

CObject* CCache::add(int id, CObject * item){
  CObjectListItem * listItem = cache->getFirst();

  while ( listItem != NULL ){
    CCacheItem * cacheItem = (CCacheItem*)listItem->getObject();
    if (cacheItem->getId() == id){
      return cacheItem->setItem(item);
    }  
    listItem = listItem->getNext();
  }

  CCacheItem * newItem = new CCacheItem(id,item);
  cache->addLast((CObject*)newItem);
  return NULL;
}


CObject * CCache::get(int id){
  CObjectListItem * item = cache->getFirst();

  while ( item != NULL ){
    CCacheItem * cacheItem = (CCacheItem*)item->getObject();
    if (cacheItem->getId() == id) return cacheItem->getItem();  
    item = item->getNext();
  }

  // Failed to find object in cache calling failFunc
  CObject * newObject = failFunc(id);
  if (newObject != NULL) add(id,newObject);

  return newObject;
}

void CCache::clear(){
  cache->deleteAll();
}