/*
 * AuthBackendFile.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 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/>.
 */

#ifndef MAD_MODULES_AUTHBACKENDFILE_AUTHBACKENDFILE_H_
#define MAD_MODULES_AUTHBACKENDFILE_AUTHBACKENDFILE_H_

#include "../export.h"

#include <Common/AuthBackend.h>
#include <Common/AuthContext.h>
#include <Common/Application.h>
#include <Common/Hash.h>

#include <Core/Configurable.h>
#include <Core/ConfigManager.h>

namespace Mad {
namespace Modules {
namespace AuthBackendFile {

class MAD_MODULE_EXPORT AuthBackendFile : public Common::AuthBackend, private Core::Configurable, private boost::noncopyable {
  private:
    class AuthContextFile : public Common::AuthContext {
      protected:
        virtual bool isAuthenticated() const {
          return true;
        }
    };

    void readFile(const std::string &name);

    Common::Application *application;

    std::vector<std::string> methods;
    std::vector<std::string> subMethods;

    std::map<std::string, std::string> userMap;

  protected:
    virtual bool handleConfigEntry(const Core::ConfigEntry &entry, bool /*handled*/);

    virtual const std::vector<std::string>& getMethods() const {
      return methods;
    }

    virtual const std::vector<std::string>& getSubMethods(const std::string &method) const throw(Core::Exception) {
      if(method != "Password")
        throw(Core::Exception(Core::Exception::NOT_IMPLEMENTED));

      return subMethods;
    }

    virtual boost::shared_ptr<Common::AuthContext> 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<Common::AuthContext> context) throw(Core::Exception);

  public:
    AuthBackendFile(Common::Application *application0) : application(application0) {
      methods.push_back("Password");

      const std::vector<std::string> &hashList = Common::Hash::getHashList();
      if(hashList.empty())
        subMethods.push_back("Clear");
      else
        subMethods.push_back(hashList.front());

      application->getConfigManager()->registerConfigurable(this);
    }

    virtual ~AuthBackendFile() {
      application->getConfigManager()->unregisterConfigurable(this);
    }
};

}
}
}

#endif /* MAD_MODULES_AUTHBACKENDFILE_AUTHBACKENDFILE_H_ */