/*
 * UserBackend.h
 *
 * Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef MAD_CORE_USERBACKEND_H_
#define MAD_CORE_USERBACKEND_H_

#include <Common/UserInfo.h>

#include <map>
#include <set>
#include <string>
#include <vector>

#include <sigc++/signal.h>


namespace Mad {
namespace Core {

class UserBackend {
  private:
    struct Compare {
      bool operator() (const UserBackend *b1, const UserBackend *b2) {
        if(b1->getPriority() == b2->getPriority())
          return (b1 > b2);
        else
          return (b1->getPriority() > b2->getPriority());
      }
    };

    static std::set<UserBackend*, Compare> backends;

  protected:
    UserBackend() {}

    static void registerBackend(UserBackend *backend) {
      backends.insert(backend);
    }

    static void unregisterBackend(UserBackend *backend) {
      backends.erase(backend);
    }

    virtual bool userList(const sigc::slot<void, const std::map<unsigned long, Common::UserInfo>& >&) {
      return false;
    }

    virtual bool userInfo(unsigned long, const sigc::slot<void, const Common::UserInfo&>&) {
      return false;
    }

    virtual bool password(unsigned long, const std::string&, const sigc::slot<void, bool>&) {
      return false;
    }

    virtual int getPriority() const {
      return 0;
    }

  public:
    virtual ~UserBackend() {}

    static bool getUserList(const sigc::slot<void, const std::map<unsigned long, Common::UserInfo>& > &callback);
    static bool getUserInfo(unsigned long uid, const sigc::slot<void, const Common::UserInfo&> &callback);

    static bool setPassword(unsigned long uid, const std::string &password, const sigc::slot<void, bool> &callback);
};

}
}

#endif /* MAD_CORE_USERBACKEND_H_ */