#ifndef seafire__resources__metadata_hxx_ #define seafire__resources__metadata_hxx_ #include #include #include #include #include #include #include #include


#include 
#include 

namespace seafire::resources
{

  // location
  //
  template
  std::optional
  get_location(R const& res)
  {
    using local_traits = traits::resource_traits;

    if constexpr (local_traits::has_location)
      return res.location();

    return std::nullopt;
  }


  // etag
  //
  template
  std::optional
  get_etag(BR const& rep)
  {
    using local_traits = representation::traits::representation_traits
;

    if constexpr (local_traits::has_entity_tag_t)
      return rep.etag();

    return std::nullopt;
  }

  inline
  std::optional
  get_etag(representation::representation_t const& rep)
  {
    return rep.etag();
  }

  template
  std::optional
  get_etag(R const& res)
  {
    using local_traits = traits::resource_traits;

    if constexpr (local_traits::has_entity_tag)
      return res.etag();

    return std::nullopt;
  }

  // last-modified
  //
  template
  std::optional
  get_last_modified(BR const& rep)
  {
    using local_traits = representation::traits::representation_traits
;

    if constexpr (local_traits::has_last_modified)
      return rep.last_modified();

    return std::nullopt;
  }

  inline
  std::optional
  get_last_modified(representation::representation_t const& rep)
  {
    return rep.last_modified();
  }

  template
  std::optional
  get_last_modified(R const& res)
  {
    using local_traits = traits::resource_traits;

    if constexpr (local_traits::has_last_modified)
      return res.last_modified();

    return std::nullopt;
  }

} // namespace seafire::resources

#endif