// Copyright 2016 Google Inc. All Rights Reserved.
//
// CdmIdentifier - Struct that holds all the information necessary to
//                 uniquely identify a CdmEngine instance in the
//                 WvContentDecryptionModule multiplexing layer.

#ifndef CDM_BASE_CDM_IDENTIFIER_H_
#define CDM_BASE_CDM_IDENTIFIER_H_

#include <string>

#include "wv_cdm_constants.h"

namespace wvcdm {

// CdmIdentifier contains all the information necessary to uniquely identify a
// distinct CdmEngine instance on Android. There should be a unique CdmEngine
// (and thus distinct storage space) for every combination of SPOID and origin.
struct CdmIdentifier {
  // The Stable Per-Origin Identifier, or SPOID. May be blank on old, SPOID-less
  // systems, in which case multiple apps with the same origin will share a
  // CdmEngine and storage.
  std::string spoid;

  // The origin. May be blank if the app does not set an origin, which is
  // the likely behavior of most non-web-browser apps.
  std::string origin;

  // The application package name provided by the application. This is used to
  // provide a friendly name of the application package for the purposes of
  // logging and metrics.
  std::string app_package_name;
};

// Provide comparison operators
inline bool operator==(const CdmIdentifier& lhs, const CdmIdentifier& rhs) {
  return lhs.spoid == rhs.spoid && lhs.origin == rhs.origin
      && lhs.app_package_name == rhs.app_package_name;
}

inline bool operator!=(const CdmIdentifier& lhs, const CdmIdentifier& rhs) {
  return !(lhs == rhs);
}

inline bool operator<(const CdmIdentifier& lhs, const CdmIdentifier& rhs) {
  return (lhs.spoid < rhs.spoid)
      || ((lhs.spoid == rhs.spoid)
          && (lhs.origin < rhs.origin
              || (lhs.origin == rhs.origin
                  && lhs.app_package_name < rhs.app_package_name)));
}

inline bool operator>(const CdmIdentifier& lhs, const CdmIdentifier& rhs) {
  return rhs < lhs;
}

inline bool operator<=(const CdmIdentifier& lhs, const CdmIdentifier& rhs) {
  return !(lhs > rhs);
}

inline bool operator>=(const CdmIdentifier& lhs, const CdmIdentifier& rhs) {
  return !(lhs < rhs);
}

// Provide default
static const CdmIdentifier kDefaultCdmIdentifier = {
  EMPTY_SPOID,
  EMPTY_ORIGIN,
  EMPTY_APP_PACKAGE_NAME
};

}  // namespace wvcdm

#endif  // CDM_BASE_CDM_IDENTIFIER_H_