chrome/browser/browsing_data/browsing_data_counter.h

   1 // Copyright (c) 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 CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_COUNTER_H_
   6 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_COUNTER_H_
   7
   8 #include <string>
   9
  10 #include "base/callback.h"
  11 #include "base/prefs/pref_member.h"
  12 #include "chrome/browser/profiles/profile.h"
  13
  14 class BrowsingDataCounter {
  15  public:
  16   typedef base::Callback<void(bool, uint32)> Callback;
  17
  18   BrowsingDataCounter();
  19   virtual ~BrowsingDataCounter();
  20
  21   // Should be called once to initialize this class.
  22   void Init(Profile* profile,
  23             const Callback& callback);
  24
  25   // Name of the preference associated with this counter.
  26   virtual const std::string& GetPrefName() const = 0;
  27
  28   // The profile associated with this counter.
  29   Profile* GetProfile() const;
  30
  31  protected:
  32   // Called when some conditions have changed and the counting should be
  33   // restarted, e.g. when the deletion preference changed state or when
  34   // we were notified of data changes.
  35   void RestartCounting();
  36
  37   // Should be called from |Count| by any overriding class to indicate that
  38   // counting is finished and report the |result|.
  39   void ReportResult(uint32 result);
  40
  41  private:
  42   // Called after the class is initialized by calling |Init|.
  43   virtual void OnInitialized();
  44
  45   // Count the data.
  46   virtual void Count() = 0;
  47
  48   // The profile for which we will count the data volume.
  49   Profile* profile_;
  50
  51   // The callback that will be called when the UI should be updated with a new
  52   // counter value.
  53   Callback callback_;
  54
  55   // The boolean preference indicating whether this data type is to be deleted.
  56   // If false, we will not count it.
  57   BooleanPrefMember pref_;
  58
  59   // Whether this counter is currently in the process of counting.
  60   bool counting_ = false;
  61
  62   // Whether this class was properly initialized by calling |Init|.
  63   bool initialized_ = false;
  64 };
  65
  66 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_COUNTER_H_