/*
 * AuthManager.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 "AuthManager.h"
#include "AuthBackend.h"

#include <boost/thread/locks.hpp>

namespace Mad {
namespace Common {

const std::vector<std::string> AuthManager::DenyBackend::methods;

void AuthManager::registerBackend(boost::shared_ptr<AuthBackend> newBackend) {
  boost::lock_guard<boost::shared_mutex> lock(mutex);

  backend = newBackend;
}

void AuthManager::unregisterBackend(boost::shared_ptr<AuthBackend> oldBackend) {
  boost::lock_guard<boost::shared_mutex> lock(mutex);

  if(oldBackend == backend)
    backend = denyBackend;
}

std::vector<std::string> AuthManager::getMethods() {
  boost::shared_lock<boost::shared_mutex> lock(mutex);

  return backend->getMethods();
}

std::vector<std::string> AuthManager::getSubMethods(const std::string &method) throw(Core::Exception) {
  boost::shared_lock<boost::shared_mutex> lock(mutex);

  return backend->getSubMethods(method);
}

boost::shared_ptr<AuthContext> AuthManager::authenticate(const std::string &method, const std::string &subMethod, const std::string &user,
    const std::vector<boost::uint8_t> &data, std::vector<boost::uint8_t> &response, boost::shared_ptr<AuthContext> context) throw(Core::Exception) {
  boost::lock_guard<boost::shared_mutex> lock(mutex);

  response.clear();

  return backend->authenticate(method, subMethod, user, data, response, context);
}

}
}