File: notifier_state_tracker.h

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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_NOTIFICATIONS_NOTIFIER_STATE_TRACKER_H_
#define CHROME_BROWSER_NOTIFICATIONS_NOTIFIER_STATE_TRACKER_H_

#include <set>
#include <string>

#include "base/memory/raw_ptr.h"
#include "components/keyed_service/core/keyed_service.h"
#include "components/prefs/pref_member.h"
#include "extensions/buildflags/buildflags.h"

#if BUILDFLAG(ENABLE_EXTENSIONS_CORE)
#include "base/scoped_observation.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/extension_registry_observer.h"
#endif

class Profile;

namespace message_center {
struct NotifierId;
}

namespace user_prefs {
class PrefRegistrySyncable;
}

// Tracks whether a given NotifierId can send notifications. Presently only used
// for extensions.
class NotifierStateTracker : public KeyedService
#if BUILDFLAG(ENABLE_EXTENSIONS_CORE)
    ,
                             public extensions::ExtensionRegistryObserver
#endif
{
 public:
  // Register profile-specific prefs of notifications.
  static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* prefs);

  explicit NotifierStateTracker(Profile* profile);
  NotifierStateTracker(const NotifierStateTracker&) = delete;
  NotifierStateTracker& operator=(const NotifierStateTracker&) = delete;
  ~NotifierStateTracker() override;

  // Returns whether the notifier with |notifier_id| may send notifications.
  bool IsNotifierEnabled(const message_center::NotifierId& notifier_id) const;

  // Updates whether the notifier with |notifier_id| may send notifications.
  void SetNotifierEnabled(const message_center::NotifierId& notifier_id,
                          bool enabled);

 private:
  // Called when the string list pref has been changed.
  void OnStringListPrefChanged(
      const char* pref_name, std::set<std::string>* ids_field);

#if BUILDFLAG(ENABLE_EXTENSIONS_CORE)
  // Fires a permission-level change event when an extension notifier has had
  // their notification permission changed.
  void FirePermissionLevelChangedEvent(
      const message_center::NotifierId& notifier_id,
      bool enabled);

  // extensions::ExtensionRegistryObserver:
  void OnExtensionUninstalled(content::BrowserContext* browser_context,
                              const extensions::Extension* extension,
                              extensions::UninstallReason reason) override;
#endif

  // The profile which owns this object.
  raw_ptr<Profile> profile_;

  // Prefs listener for disabled_extension_id.
  StringListPrefMember disabled_extension_id_pref_;

  // On-memory data for the availability of extensions.
  std::set<std::string> disabled_extension_ids_;

#if BUILDFLAG(ENABLE_EXTENSIONS_CORE)
  // An observer to listen when extension is uninstalled.
  base::ScopedObservation<extensions::ExtensionRegistry,
                          extensions::ExtensionRegistryObserver>
      extension_registry_observation_{this};
#endif
};

#endif  // CHROME_BROWSER_NOTIFICATIONS_NOTIFIER_STATE_TRACKER_H_