/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/**
 * Copyright (C) 2013 Regents of the University of California.
 * @author: Jeff Thompson <jefft0@remap.ucla.edu>
 * See COPYING for copyright and distribution information.
 */

#include <ndn-cpp/common.hpp>
#include <ndn-cpp/data.hpp>

using namespace std;

namespace ndn {

const Block& 
Data::wireEncode() const
{
  if (wire_.hasWire())
    return wire_;

  wire_ = Block(Tlv::Data);

  // Name
  wire_.push_back(getName().wireEncode());

  // MetaInfo
  wire_.push_back(getMetaInfo().wireEncode());

  // Content
  wire_.push_back(content_);

  if (!signature_) {
    throw Error("Requested wire format, but data packet has not been signed yet");
  }

  ///////////////
  // Signature //
  ///////////////
  
  // SignatureInfo
  wire_.push_back(signature_.getInfo());
  
  // SignatureValue
  wire_.push_back(signature_.getValue());
  
  wire_.encode();
  return wire_;  
}
  
/**
 * Decode the input using a particular wire format and update this Data. 
 * @param input The input byte array to be decoded.
 */
void
Data::wireDecode(const Block &wire)
{
  wire_ = wire;
  wire_.parse();

  // Name
  name_.wireDecode(wire_.get(Tlv::Name));

  // MetaInfo
  metaInfo_.wireDecode(wire_.get(Tlv::MetaInfo));

  // Content
  content_ = wire_.get(Tlv::Content);

  ///////////////
  // Signature //
  ///////////////
  
  // SignatureInfo
  signature_.setInfo(wire_.get(Tlv::SignatureInfo));
  
  // SignatureValue
  signature_.setValue(wire_.get(Tlv::SignatureValue));
}


}