chromecast/crash/app_state_tracker.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROMECAST_CRASH_APP_STATE_TRACKER_H_
   6 #define CHROMECAST_CRASH_APP_STATE_TRACKER_H_
   7
   8 #include <string>
   9
  10 namespace chromecast {
  11
  12 class AppStateTracker {
  13  public:
  14   // Record |app_id| as the last app that attempted to launch.
  15   static void SetLastLaunchedApp(const std::string& app_id);
  16
  17   // The current app becomes the previous app, |app_id| becomes the current app.
  18   static void SetCurrentApp(const std::string& app_id);
  19
  20   // Returns the id of the app that was last attempted to launch.
  21   static std::string GetLastLaunchedApp();
  22
  23   // Returns the id of the active app.
  24   static std::string GetCurrentApp();
  25
  26   // Returns the id of the app which was previously active.
  27   static std::string GetPreviousApp();
  28 };
  29
  30 }  // namespace chromecast
  31
  32 #endif  // CHROMECAST_CRASH_APP_STATE_TRACKER_H_