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#ifndef MOZC_SESSION_SESSION_USAGE_STATS_UTIL_H_
#define MOZC_SESSION_SESSION_USAGE_STATS_UTIL_H_

#include "base/port.h"

namespace mozc {
namespace commands {
class Context;
class Input;
class Output;
}  // namespace commands

namespace session {

class SessionUsageStatsUtil {
 public:
  // Returns true if the key is in input::context.  This function can be called
  // multiple times if there are multiple target keys.  It is not efficient, but
  // acceptable because the size of the experimental_features is very small,
  // which is less than 5.
  static bool HasExperimentalFeature(const commands::Context &context,
                                     const char *key);
  static void AddSendKeyInputStats(const mozc::commands::Input &input);
  static void AddSendKeyOutputStats(const mozc::commands::Output &output);
  static void AddSendCommandInputStats(const mozc::commands::Input &input);

 private:
  DISALLOW_IMPLICIT_CONSTRUCTORS(SessionUsageStatsUtil);
};

}  // namespace session
}  // namespace mozc

#endif  // MOZC_SESSION_SESSION_USAGE_STATS_UTIL_H_