/*
 * UserListDiff.cpp
 *
 * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "UserListDiff.h"
#include "UserList.h"

namespace Mad {
namespace Modules {
namespace UserListManager {

UserListDiff::UserListDiff(const UserList *oldList, const UserList *newList) {
  for(UserList::const_iterator user = oldList->begin(); user != oldList->end(); ++user)
    deletedUsers.insert(*user);

  for(UserList::const_iterator user = newList->begin(); user != newList->end(); ++user) {
    std::set<UserListEntry>::const_iterator it = deletedUsers.find(*user);

    if(it != deletedUsers.end()) {
      deletedUsers.erase(it);
      unchangedUsers.insert(*user);
    }
    else {
      addedUsers.insert(*user);
    }
  }
}

}
}
}