chrome/browser/search/hotword_audio_history_handler.h

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_SEARCH_HOTWORD_AUDIO_HISTORY_HANDLER_H_
#define CHROME_BROWSER_SEARCH_HOTWORD_AUDIO_HISTORY_HANDLER_H_

#include "base/prefs/pref_change_registrar.h"
#include "content/public/browser/browser_context.h"

class Profile;

// A class which handles the audio history pref for hotwording. This has been
// pulled into its own class in order to transparently (to the rest of
// hotwording) handle changing user global pref management systems.
class HotwordAudioHistoryHandler {
 public:
  explicit HotwordAudioHistoryHandler(content::BrowserContext* context);
  ~HotwordAudioHistoryHandler();

  // Returns the current preference value based on the user's account info
  // or false if the user is not signed in.
  // TODO(rlp): Determine return value -- pref value or success?
  bool GetAudioHistoryEnabled();

 private:
  // Sets the user's global pref value for enabling audio history.
  void SetAudioHistoryEnabled(const bool enabled);

  void OnAudioHistoryEnabledChanged(const std::string& pref_name);

  Profile* profile_;
  PrefChangeRegistrar pref_change_registrar_;

  DISALLOW_COPY_AND_ASSIGN(HotwordAudioHistoryHandler);
};

#endif  // CHROME_BROWSER_SEARCH_HOTWORD_AUDIO_HISTORY_HANDLER_H_