chrome/browser/notifications/notifier_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 CHROME_BROWSER_NOTIFICATIONS_NOTIFIER_STATE_TRACKER_H_
   6 #define CHROME_BROWSER_NOTIFICATIONS_NOTIFIER_STATE_TRACKER_H_
   7
   8 #include <set>
   9 #include <string>
  10
  11 #include "base/macros.h"
  12 #include "base/prefs/pref_member.h"
  13 #include "components/keyed_service/core/keyed_service.h"
  14
  15 #if defined(ENABLE_EXTENSIONS)
  16 #include "base/scoped_observer.h"
  17 #include "extensions/browser/extension_registry.h"
  18 #include "extensions/browser/extension_registry_observer.h"
  19 #endif
  20
  21 class Profile;
  22
  23 namespace message_center {
  24 struct NotifierId;
  25 }
  26
  27 namespace user_prefs {
  28 class PrefRegistrySyncable;
  29 }
  30
  31 // Tracks whether a given NotifierId can send notifications.
  32 class NotifierStateTracker : public KeyedService
  33 #if defined(ENABLE_EXTENSIONS)
  34                            , public extensions::ExtensionRegistryObserver
  35 #endif
  36                                {
  37  public:
  38   // Register profile-specific prefs of notifications.
  39   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* prefs);
  40
  41   explicit NotifierStateTracker(Profile* profile);
  42   ~NotifierStateTracker() override;
  43
  44   // Returns whether the notifier with |notifier_id| may send notifications.
  45   bool IsNotifierEnabled(const message_center::NotifierId& notifier_id) const;
  46
  47   // Updates whether the notifier with |notifier_id| may send notifications.
  48   void SetNotifierEnabled(const message_center::NotifierId& notifier_id,
  49                           bool enabled);
  50
  51  private:
  52   // Called when the string list pref has been changed.
  53   void OnStringListPrefChanged(
  54       const char* pref_name, std::set<std::string>* ids_field);
  55
  56 #if defined(ENABLE_EXTENSIONS)
  57   // Fires a permission-level change event when an extension notifier has had
  58   // their notification permission changed.
  59   void FirePermissionLevelChangedEvent(
  60       const message_center::NotifierId& notifier_id,
  61       bool enabled);
  62
  63   // extensions::ExtensionRegistryObserver:
  64   void OnExtensionUninstalled(content::BrowserContext* browser_context,
  65                               const extensions::Extension* extension,
  66                               extensions::UninstallReason reason) override;
  67 #endif
  68
  69   // The profile which owns this object.
  70   Profile* profile_;
  71
  72   // Prefs listener for disabled_extension_id.
  73   StringListPrefMember disabled_extension_id_pref_;
  74
  75   // Prefs listener for disabled_system_component_id.
  76   StringListPrefMember disabled_system_component_id_pref_;
  77
  78   // On-memory data for the availability of extensions.
  79   std::set<std::string> disabled_extension_ids_;
  80
  81   // On-memory data for the availability of system_component.
  82   std::set<std::string> disabled_system_component_ids_;
  83
  84 #if defined(ENABLE_EXTENSIONS)
  85   // An observer to listen when extension is uninstalled.
  86   ScopedObserver<extensions::ExtensionRegistry,
  87                  extensions::ExtensionRegistryObserver>
  88       extension_registry_observer_;
  89 #endif
  90
  91   DISALLOW_COPY_AND_ASSIGN(NotifierStateTracker);
  92 };
  93
  94 #endif  // CHROME_BROWSER_NOTIFICATIONS_NOTIFIER_STATE_TRACKER_H_