/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 Tatsuhiro Tsujikawa
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
 */
/* copyright --> */
#ifndef _D_COOKIE_STORAGE_H_
#define _D_COOKIE_STORAGE_H_

#include "common.h"

#include <string>
#include <deque>
#include <vector>
#include <algorithm>

#include "a2time.h"
#include "Cookie.h"
#include "CookieParser.h"

namespace aria2 {

class Logger;

class CookieStorage {
public:

  static const size_t MAX_COOKIE_PER_DOMAIN = 50;

  class DomainEntry {
  private:
    std::string _key;

    time_t _lastAccess;

    std::deque<Cookie> _cookies;
  public:
    DomainEntry(const std::string& domain);

    const std::string& getKey() const
    {
      return _key;
    }

    template<typename OutputIterator>
    OutputIterator findCookie
    (OutputIterator out,
     const std::string& requestHost,
     const std::string& requestPath,
     time_t date, bool secure)
    {
      for(std::deque<Cookie>::iterator i = _cookies.begin();
          i != _cookies.end(); ++i) {
        if((*i).match(requestHost, requestPath, date, secure)) {
          (*i).updateLastAccess();
          out++ = *i;
        }
      }
      return out;
    }

    size_t countCookie() const
    {
      return _cookies.size();
    }

    bool addCookie(const Cookie& cookie);

    void updateLastAccess();

    time_t getLastAccess() const
    {
      return _lastAccess;
    }

    void writeCookie(std::ostream& o) const;

    bool contains(const Cookie& cookie) const;

    template<typename OutputIterator>
    OutputIterator dumpCookie(OutputIterator out) const
    {
      return std::copy(_cookies.begin(), _cookies.end(), out);
    }

    bool operator<(const DomainEntry& de) const
    {
      return _key < de._key;
    }
  };
private:
  std::deque<DomainEntry> _domains;

  CookieParser _parser;

  Logger* _logger;

  template<typename InputIterator>
  void storeCookies(InputIterator first, InputIterator last)
  {
    for(; first != last; ++first) {
      store(*first);
    }
  }
public:
  CookieStorage();

  ~CookieStorage();

  // Returns true if cookie is stored or updated existing cookie.
  // Returns false if cookie is expired.
  bool store(const Cookie& cookie);

  // Returns true if cookie is stored or updated existing cookie.
  // Otherwise, returns false.
  bool parseAndStore(const std::string& setCookieString,
                     const std::string& requestHost,
                     const std::string& requestPath);

  // Finds cookies matched with given criteria and returns them.
  // Matched cookies' _lastAccess property is updated.
  std::vector<Cookie> criteriaFind(const std::string& requestHost,
                                   const std::string& requestPath,
                                   time_t date, bool secure);

  // Loads Cookies from file denoted by filename.  If compiled with
  // libsqlite3, this method automatically detects the specified file
  // is sqlite3 or just plain text file and calls appropriate parser
  // implementation class.  If Cookies are successfully loaded, this
  // method returns true.  Otherwise, this method returns false.
  bool load(const std::string& filename);
  
  // Saves Cookies in Netspace format which is used in
  // Firefox1.2/Netscape/Mozilla.  If Cookies are successfully saved,
  // this method returns true, otherwise returns false.
  bool saveNsFormat(const std::string& filename);

  // Returns the number of cookies this object stores.
  size_t size() const;
  
  // Returns true if this object contains a cookie x where x == cookie
  // satisfies.
  bool contains(const Cookie& cookie) const;

  template<typename OutputIterator>
  OutputIterator dumpCookie(OutputIterator out) const
  {
    for(std::deque<DomainEntry>::const_iterator i = _domains.begin(),
          eoi = _domains.end(); i != eoi; ++i) {
      out = (*i).dumpCookie(out);
    }
    return out;
  }
};

} // namespace aria2

#endif // _D_COOKIE_STORAGE_H_
