chrome/browser/prefs/tracked/pref_service_hash_store_contents.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 #ifndef CHROME_BROWSER_PREFS_TRACKED_PREF_SERVICE_HASH_STORE_CONTENTS_H_
   6 #define CHROME_BROWSER_PREFS_TRACKED_PREF_SERVICE_HASH_STORE_CONTENTS_H_
   7
   8 #include <string>
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/macros.h"
  12 #include "chrome/browser/prefs/tracked/hash_store_contents.h"
  13
  14 class PrefRegistrySimple;
  15 class PrefService;
  16
  17 // Implements HashStoreContents by storing hashes in a PrefService. Multiple
  18 // separate hash stores may coexist in the PrefService by using distinct hash
  19 // store IDs.
  20 class PrefServiceHashStoreContents : public HashStoreContents {
  21  public:
  22   // Constructs a HashStoreContents that stores hashes in |pref_service|.
  23   // Multiple hash stores can use the same |pref_service| with distinct
  24   // |hash_store_id|s.
  25   //
  26   // |pref_service| must have previously been configured using |RegisterPrefs|.
  27   PrefServiceHashStoreContents(const std::string& hash_store_id,
  28                                PrefService* pref_service);
  29
  30   // The name of a dict that is stored as a child of
  31   // |prefs::kProfilePreferenceHashes|. Each child node is a string whose name
  32   // is a hash store ID and whose value is the super MAC for the corresponding
  33   // hash store.
  34   static const char kHashOfHashesDict[];
  35
  36   // The name of a dict that is stored as a child of
  37   // |prefs::kProfilePreferenceHashes|. Each child node is a number whose name
  38   // is a hash store ID and whose value is the version of the corresponding
  39   // hash store.
  40   static const char kStoreVersionsDict[];
  41
  42   // Registers required preferences.
  43   static void RegisterPrefs(PrefRegistrySimple* registry);
  44
  45   // Deletes stored hashes for all profiles from |pref_service|.
  46   static void ResetAllPrefHashStores(PrefService* pref_service);
  47
  48   // HashStoreContents implementation
  49   virtual std::string hash_store_id() const OVERRIDE;
  50   virtual void Reset() OVERRIDE;
  51   virtual bool IsInitialized() const OVERRIDE;
  52   virtual bool GetVersion(int* version) const OVERRIDE;
  53   virtual void SetVersion(int version) OVERRIDE;
  54   virtual const base::DictionaryValue* GetContents() const OVERRIDE;
  55   virtual scoped_ptr<MutableDictionary> GetMutableContents() OVERRIDE;
  56   virtual std::string GetSuperMac() const OVERRIDE;
  57   virtual void SetSuperMac(const std::string& super_mac) OVERRIDE;
  58   virtual void CommitPendingWrite() OVERRIDE;
  59
  60  private:
  61   const std::string hash_store_id_;
  62   PrefService* pref_service_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(PrefServiceHashStoreContents);
  65 };
  66
  67 #endif  // CHROME_BROWSER_PREFS_TRACKED_PREF_SERVICE_HASH_STORE_CONTENTS_H_