/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2013-2016, Regents of the University of California.
 *
 * This file is part of ChronoShare, a decentralized file sharing application over NDN.
 *
 * ChronoShare 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.
 *
 * ChronoShare 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 copies of the GNU General Public License along with
 * ChronoShare, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ChronoShare authors and contributors.
 */
//
// connection.hpp
// ~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//

#ifndef HTTP_CONNECTION_HPP
#define HTTP_CONNECTION_HPP

#include <boost/asio.hpp>
#include <boost/array.hpp>
#include <boost/noncopyable.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/enable_shared_from_this.hpp>
#include "reply.hpp"
#include "request.hpp"
#include "request_handler.hpp"
#include "request_parser.hpp"

namespace http {
namespace server {

class connection_manager;

/// Represents a single connection from a client.
class connection
  : public boost::enable_shared_from_this<connection>,
    private boost::noncopyable
{
public:
  /// Construct a connection with the given io_service.
  explicit connection(boost::asio::io_service& io_service,
      connection_manager& manager, request_handler& handler);

  /// Get the socket associated with the connection.
  boost::asio::ip::tcp::socket& socket();

  /// Start the first asynchronous operation for the connection.
  void start();

  /// Stop all asynchronous operations associated with the connection.
  void stop();

private:
  /// Handle completion of a read operation.
  void handle_read(const boost::system::error_code& e,
      std::size_t bytes_transferred);

  /// Handle completion of a write operation.
  void handle_write(const boost::system::error_code& e);

  /// Socket for the connection.
  boost::asio::ip::tcp::socket socket_;

  /// The manager for this connection.
  connection_manager& connection_manager_;

  /// The handler used to process the incoming request.
  request_handler& request_handler_;

  /// Buffer for incoming data.
  boost::array<char, 8192> buffer_;

  /// The incoming request.
  request request_;

  /// The parser for the incoming request.
  request_parser request_parser_;

  /// The reply to be sent back to the client.
  reply reply_;
};

typedef boost::shared_ptr<connection> connection_ptr;

} // namespace server
} // namespace http

#endif // HTTP_CONNECTION_HPP