chromecast/common/chromecast_config.h

   1 // Copyright 2014 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 // Chromecast-specific configurations retrieved from and stored into a given
   6 // configuration file.
   7
   8 #ifndef CHROMECAST_COMMON_CHROMECAST_CONFIG_H_
   9 #define CHROMECAST_COMMON_CHROMECAST_CONFIG_H_
  10
  11 #include <string>
  12
  13 #include "base/files/file_path.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "base/prefs/pref_service.h"
  17 #include "base/threading/sequenced_worker_pool.h"
  18 #include "base/threading/thread_checker.h"
  19
  20 class PrefRegistrySimple;
  21
  22 namespace chromecast {
  23
  24 // Manages configuration for Chromecast via PrefService.
  25 // It uses JsonPrefStore internally and/so the format of config file is same to
  26 // that of JsonPrefStore.
  27 // It is NOT thread-safe; all functions must be run on the same thread as
  28 // the object is created.
  29 class ChromecastConfig {
  30  public:
  31   // Creates new singleton instance of ChromecastConfig.
  32   static void Create(PrefRegistrySimple* registry);
  33
  34   // Returns the singleton instance of ChromecastConfig.
  35   static ChromecastConfig* GetInstance();
  36
  37   // Saves configs into configuration file.
  38   void Save() const;
  39
  40   // Returns string value for key, if present.
  41   const std::string GetValue(const std::string& key) const;
  42
  43   // Returns integer value for key, if present.
  44   const int GetIntValue(const std::string& key) const;
  45
  46   // Sets new string value for key.
  47   void SetValue(const std::string& key, const std::string& value) const;
  48
  49   // Sets new int value for key.
  50   void SetIntValue(const std::string& key, int value) const;
  51
  52   scoped_refptr<base::SequencedWorkerPool> worker_pool() const {
  53     return worker_pool_;
  54   }
  55
  56   PrefService* pref_service() const { return pref_service_.get(); }
  57
  58  private:
  59   ChromecastConfig();
  60   ~ChromecastConfig();
  61
  62   // Loads configs from config file. Returns true if successful.
  63   bool Load(PrefRegistrySimple* registry);
  64
  65   // Registers any needed preferences for the current platform.
  66   void RegisterPlatformPrefs(PrefRegistrySimple* registry);
  67
  68   // Global singleton instance.
  69   static ChromecastConfig* g_instance_;
  70
  71   const base::FilePath config_path_;
  72   const scoped_refptr<base::SequencedWorkerPool> worker_pool_;
  73   scoped_ptr<PrefService> pref_service_;
  74
  75   base::ThreadChecker thread_checker_;
  76
  77   DISALLOW_COPY_AND_ASSIGN(ChromecastConfig);
  78 };
  79
  80 }  // namespace chromecast
  81
  82 #endif  // CHROMECAST_COMMON_CHROMECAST_CONFIG_H_