/* rcacheactor.h
 * 
 * Copyright (c) 2000-2003 Conectiva S/A 
 *               2002 Michael Vogt <mvo@debian.org>
 * 
 * Author: Alfredo K. Kojima <kojima@conectiva.com.br>
 *         Michael Vogt <mvo@debian.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
 */

#ifndef RCACHEACTOR_H
#define RCACHEACTOR_H

#include "rpackagelister.h"
#include <regex.h>

class RCacheActor:public RCacheObserver {
 public:

   enum Action {
      ACTION_KEEP,
      ACTION_INSTALL,
      ACTION_REINSTALL,
      ACTION_REMOVE
   };

 protected:

   RPackageLister *_lister;
   RPackageLister::pkgState *_laststate;

 public:

   virtual void run(vector<RPackage *> &List, int Action) = 0;

   virtual void notifyCachePreChange() {
      updateState();
   }

   virtual void notifyCachePostChange();

   virtual void notifyCacheOpen() {
   }

   virtual void updateState() {
      delete _laststate;
      _laststate = new RPackageLister::pkgState;
      _lister->saveState(*_laststate);
   }

   RCacheActor(RPackageLister *lister)
 :   _lister(lister), _laststate(0) {
      _lister->registerCacheObserver(this);
   }

   virtual ~ RCacheActor() {
      _lister->unregisterCacheObserver(this);
   }
};

class RCacheActorRecommends:public RCacheActor {
 protected:

   typedef vector<string> ListType;
   typedef map<string, ListType> MapType;
   typedef map<regex_t *, ListType> RegexMapType;

   MapType _map;
   MapType _map_wildcard;
   RegexMapType _map_regex;

   string _langLast;
   ListType _langCache;

   void setLanguageCache();

   inline bool actOnPkg(string name, int Action) {
      RPackage *Pkg = _lister->getPackage(name);
      if (Pkg != NULL) {
         switch (Action) {
            case ACTION_KEEP:
               Pkg->setKeep();
               break;
            case ACTION_INSTALL:
               Pkg->setInstall();
               break;
            case ACTION_REMOVE:
               Pkg->setRemove();
               break;
         }
         return true;
      }
      return false;
   }


 public:

   virtual void run(vector<RPackage *> &List, int Action);

   virtual void notifyCachePostChange();

   RCacheActorRecommends(RPackageLister *lister, string FileName);
   virtual ~RCacheActorRecommends();
};

#endif

// vim:sts=3:sw=3
