/* <!-- 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 --> */
#include "CookieParser.h"
#include "Util.h"
#include "A2STR.h"
#include <strings.h>
#include <utility>
#include <istream>

namespace aria2 {

const std::string CookieParser::C_SECURE("secure");

const std::string CookieParser::C_DOMAIN("domain");

const std::string CookieParser::C_PATH("path");

const std::string CookieParser::C_EXPIRES("expires");

void CookieParser::setField(Cookie& cookie, const std::string& name, const std::string& value) const
{
  if(name == C_SECURE) {
    cookie.secure = true;
  } else if(name == C_DOMAIN) {
    cookie.domain = value;
  } else if(name == C_PATH) {
    cookie.path = value;
  } else if(name == C_EXPIRES) {
    time_t expires = Util::httpGMT(value);
    if(expires == -1) {
      // If parsing expire date is failed, it is assumed as a session scope
      // cookie.
      cookie.onetime = true;
    } else {
      cookie.expires = expires;
      cookie.onetime = false;
    }
  } else {
    cookie.name = name;
    cookie.value = value;
  }
}

Cookie CookieParser::parse(const std::string& cookieStr) const
{
  return parse(cookieStr, A2STR::NIL, A2STR::NIL);
}

Cookie CookieParser::parse(const std::string& cookieStr, const std::string& defaultDomain, const std::string& defaultPath) const
{
  Cookie cookie;
  cookie.domain = defaultDomain;
  cookie.path = defaultPath;
  std::deque<std::string> terms;
  Util::slice(terms, Util::trim(cookieStr), ';', true);
  for(std::deque<std::string>::iterator itr = terms.begin(); itr != terms.end(); itr++) {
    std::pair<std::string, std::string> nv;
    Util::split(nv, *itr, '=');
    setField(cookie, nv.first, nv.second);
  }
  return cookie;
}


Cookies CookieParser::parse(std::istream& s) const
{
  Cookies cookies;
  std::string line;
  while(getline(s, line)) {
    if(Util::trim(line).empty() || Util::startsWith(line, A2STR::SHARP_C)) {
      continue;
    }
    Cookie cookie = parse(line);
    if(cookie.good()) {
      cookies.push_back(cookie);
    }
  }
  return cookies;
}

} // namespace aria2
