/* <!-- 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 "Metalinker.h"
#include <algorithm>

Metalinker::Metalinker() {
}

Metalinker::~Metalinker() {}

class EntryQuery {
private:
  string version;
  string language;
  string os;
public:
  EntryQuery(const string& version,
	     const string& language,
	     const string& os):
    version(version),
    language(language),
    os(os) {}

  bool operator()(const MetalinkEntryHandle& entry) {
    if(!version.empty()) {
      if(version != entry->version) {
	return false;
      }
    }
    if(!language.empty()) {
      if(language != entry->language) {
	return false;
      }
    }
    if(!os.empty()) {
      if(os != entry->os) {
	return false;
      }
    }
    return true;
  }
};

MetalinkEntries Metalinker::queryEntry(const string& version,
				       const string& language,
				       const string& os) const {
  MetalinkEntries resultEntries(entries.begin(), entries.end());
  MetalinkEntries::iterator split =
    partition(resultEntries.begin(), resultEntries.end(),
	      EntryQuery(version, language, os));
  resultEntries.erase(split, resultEntries.end());
  return resultEntries;
}