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/*
 * Copyright (c) 2003-2009, John Wiegley.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of New Artisans LLC nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "balpair.h"

namespace ledger {

optional<balance_pair_t>
balance_pair_t::value(const optional<datetime_t>&   moment,
		      const optional<commodity_t&>& in_terms_of) const
{
  optional<balance_t> temp = quantity().value(moment, in_terms_of);
  optional<balance_t> cost_temp;
  if (cost)
    cost_temp = cost->value(moment, in_terms_of);

  if (temp) {
    if (cost_temp)
      return balance_pair_t(*temp, *cost_temp);
    else if (cost)
      return balance_pair_t(*temp, *cost);
    else
      return balance_pair_t(*temp);
  }
  return none;
}

void balance_pair_t::write_xml(std::ostream& out, const int depth) const
{
  out << xml_str("<balance-pair>\n", depth);

  quantity().write_xml(out, depth + 1);
  if (cost)
    cost->write_xml(out, depth + 1);

  out << xml_str("</balance-pair>\n", depth);
}

} // namespace ledger