link.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NDN_LINK_HPP
#define NDN_LINK_HPP

#include "data.hpp"
#include <set>

namespace ndn {

const size_t INVALID_SELECTED_DELEGATION_INDEX = std::numeric_limits<size_t>::max();

class Link : public Data
{
public:
  class Error : public Data::Error
  {
  public:
    explicit
    Error(const std::string& what)
      : Data::Error(what)
    {
    }
  };

  // The ordering is based on the preference number and needs to be preserved
  typedef std::set<std::pair<uint32_t, Name>> DelegationSet;

  Link() = default;

  explicit
  Link(const Block& block);

  explicit
  Link(const Name& name);

  Link(const Name& name, std::initializer_list<std::pair<uint32_t, Name>> links);

  void
  addDelegation(uint32_t preference, const Name& name);

  bool
  removeDelegation(const Name& name);

  const DelegationSet&
  getDelegations() const;

  void
  wireDecode(const Block& wire);

  static std::tuple<uint32_t, Name>
  getDelegationFromWire(const Block& block, size_t index);

  static ssize_t
  findDelegationFromWire(const Block& block, const Name& delegationName);

  static ssize_t
  countDelegationsFromWire(const Block& block);

protected:
  template<encoding::Tag TAG>
  size_t
  encodeContent(EncodingImpl<TAG>& encoder) const;

  void
  encodeContent();

  void
  decodeContent();

private:
  bool
  removeDelegationNoEncode(const Name& name);

private:
  DelegationSet m_delegations;
};

} // namespace ndn

#endif // NDN_LINK_HPP