/* <!-- 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 "MetalinkHelper.h"
#include "Option.h"
#include "MetalinkEntry.h"
#include "MetalinkParserStateMachine.h"
#include "Metalinker.h"
#include "MetalinkProcessor.h"
#include "prefs.h"
#include "DlAbortEx.h"
#include "BinaryStream.h"
#include "MetalinkMetaurl.h"

namespace aria2 {

MetalinkHelper::MetalinkHelper() {}

MetalinkHelper::~MetalinkHelper() {}

void MetalinkHelper::parseAndQuery
(std::vector<SharedHandle<MetalinkEntry> >& result,
 const std::string& filename, const Option* option)
{
  MetalinkProcessor proc;
  SharedHandle<Metalinker> metalinker = proc.parseFile(filename);
  query(result, metalinker, option);
}

void MetalinkHelper::parseAndQuery
(std::vector<SharedHandle<MetalinkEntry> >& result,
 const SharedHandle<BinaryStream>& binaryStream, const Option* option)
{
  MetalinkProcessor proc;
  SharedHandle<Metalinker> metalinker =proc.parseFromBinaryStream(binaryStream);
  query(result, metalinker, option);
}

void MetalinkHelper::query
(std::vector<SharedHandle<MetalinkEntry> >& result,
 const SharedHandle<Metalinker>& metalinker, const Option* option)
{
  if(metalinker->entries.empty()) {
    throw DL_ABORT_EX("No file entry found. Probably, the metalink file is not configured properly or broken.");
  }
  metalinker->queryEntry(result,
                         option->get(PREF_METALINK_VERSION),
                         option->get(PREF_METALINK_LANGUAGE),
                         option->get(PREF_METALINK_OS));
}

void MetalinkHelper::groupEntryByMetaurlName
(std::vector<
 std::pair<std::string, std::vector<SharedHandle<MetalinkEntry> > > >& result,
 const std::vector<SharedHandle<MetalinkEntry> >& entries)
{
  for(std::vector<SharedHandle<MetalinkEntry> >::const_iterator eiter =
        entries.begin(), eoi = entries.end(); eiter != eoi; ++eiter) {
    if((*eiter)->metaurls.empty()) {
      std::pair<std::string, std::vector<SharedHandle<MetalinkEntry> > > p;
      p.second.push_back(*eiter);
      result.push_back(p);
    } else {
      std::vector<
      std::pair<std::string,
        std::vector<SharedHandle<MetalinkEntry> > > >::iterator i =
        result.begin();
      if((*eiter)->metaurls[0]->name.empty() ||
         !(*eiter)->sizeKnown) {
        i = result.end();
      }
      for(; i != result.end(); ++i) {
        if((*i).first == (*eiter)->metaurls[0]->url &&
           !(*i).second[0]->metaurls[0]->name.empty()) {
          (*i).second.push_back(*eiter);
          break;
        }
      }
      if(i == result.end()) {
        std::pair<std::string, std::vector<SharedHandle<MetalinkEntry> > > p;
        p.first = (*eiter)->metaurls[0]->url;
        p.second.push_back(*eiter);
        result.push_back(p);
      }
    }
  }
}

} // namespace aria2
