/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2009 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 "XmlRpcResponse.h"

#include <cassert>
#include <sstream>

#include "util.h"
#ifdef HAVE_LIBZ
# include "GZipEncoder.h"
#endif // HAVE_LIBZ

namespace aria2 {

namespace xmlrpc {

template<typename OutputStream>
static void encodeValue(const BDE& value, OutputStream& o);

template<typename InputIterator, typename OutputStream>
static void encodeArray
(InputIterator first, InputIterator last, OutputStream& o)
{
  o << "<array>" << "<data>";
  for(; first != last; ++first) {
    encodeValue(*first, o);
  }
  o << "</data>" << "</array>";
}

template<typename InputIterator, typename OutputStream>
static void encodeStruct
(InputIterator first, InputIterator last, OutputStream& o)
{
  o << "<struct>";
  for(; first != last; ++first) {
    o << "<member>"
      << "<name>" << util::htmlEscape((*first).first) << "</name>";
    encodeValue((*first).second, o);
    o << "</member>";
  }
  o << "</struct>";
}

template<typename OutputStream>
static void encodeValue(const BDE& value, OutputStream& o)
{
  o << "<value>";
  if(value.isString()) {
    o << "<string>" << util::htmlEscape(value.s()) << "</string>";
  } else if(value.isInteger()) {
    o << "<int>" << value.i() << "</int>";
  } else if(value.isList()) {
    encodeArray(value.listBegin(), value.listEnd(), o);
  } else if(value.isDict()) {
    encodeStruct(value.dictBegin(), value.dictEnd(), o);
  }
  o << "</value>";
}

template<typename OutputStream>
std::string encodeAll(OutputStream& o, int code, const BDE& param)
{
  o << "<?xml version=\"1.0\"?>" << "<methodResponse>";
  if(code == 0) {
    o << "<params>" << "<param>";
    encodeValue(param, o);
    o << "</param>" << "</params>";
  } else {
    o << "<fault>";
    encodeValue(param, o);
    o << "</fault>";
  }
  o << "</methodResponse>";
  return o.str();
}

std::string XmlRpcResponse::toXml(bool gzip) const
{
  if(gzip) {
#ifdef HAVE_LIBZ
    GZipEncoder o;
    o.init();
    return encodeAll(o, _code, _param);
#else // !HAVE_LIBZ
    abort();
#endif // !HAVE_LIBZ
  } else {
    std::stringstream o;
    return encodeAll(o, _code, _param);
  }
}

} // namespace xmlrpc

} // namespace aria2
