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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_SUPERVISED_USER_LEGACY_SUPERVISED_USER_SYNC_SERVICE_H_
#define CHROME_BROWSER_SUPERVISED_USER_LEGACY_SUPERVISED_USER_SYNC_SERVICE_H_
#include <string>
#include <vector>
#include "base/callback_forward.h"
#include "base/memory/scoped_ptr.h"
#include "base/observer_list.h"
#include "base/prefs/pref_change_registrar.h"
#include "chrome/browser/supervised_user/legacy/supervised_user_sync_service_observer.h"
#include "chrome/browser/supervised_user/supervised_users.h"
#include "components/keyed_service/core/keyed_service.h"
#include "sync/api/syncable_service.h"
namespace base {
class DictionaryValue;
}
namespace user_prefs {
class PrefRegistrySyncable;
}
class PrefService;
class SupervisedUserSyncService : public KeyedService,
public syncer::SyncableService {
public:
// For use with GetSupervisedUsersAsync() below.
typedef base::Callback<void(const base::DictionaryValue*)>
SupervisedUsersCallback;
// Dictionary keys for entry values of |prefs::kSupervisedUsers|.
static const char kAcknowledged[];
static const char kChromeAvatar[];
static const char kChromeOsAvatar[];
static const char kMasterKey[];
static const char kPasswordSignatureKey[];
static const char kPasswordEncryptionKey[];
static const char kName[];
// Represents a non-existing avatar on Chrome and Chrome OS.
static const int kNoAvatar;
~SupervisedUserSyncService() override;
static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
// Extracts the avatar index from the input |avatar_str| and set
// |avatar_index| to hold the extracted value. Returns true if the
// index was extracted successfully and false otherwise.
// |avatar_str| should have the format: "chrome-avatar-index:INDEX"
// where INDEX is the integer to be extracted. |avatar_str| can be empty
// in case there is no avatar synced for a supervised user in which case
// |avatar_index| is set to -1.
static bool GetAvatarIndex(const std::string& avatar_str,
int* avatar_index);
// Given an |avatar_index|, it returns a string of the form:
// "chrome-avatar-index:INDEX" where INDEX = |avatar_index|.
// It is exposed for testing purposes only.
static std::string BuildAvatarString(int avatar_index);
void AddObserver(SupervisedUserSyncServiceObserver* observer);
void RemoveObserver(SupervisedUserSyncServiceObserver* observer);
void AddSupervisedUser(const std::string& id,
const std::string& name,
const std::string& master_key,
const std::string& signature_key,
const std::string& encryption_key,
int avatar_index);
void UpdateSupervisedUser(const std::string& id,
const std::string& name,
const std::string& master_key,
const std::string& signature_key,
const std::string& encryption_key,
int avatar_index);
void DeleteSupervisedUser(const std::string& id);
// Updates the supervised user avatar only if the supervised user has
// no avatar and |avatar_index| is set to some value other than
// |kNoAvatar|. If |avatar_index| equals |kNoAvatar| and the
// supervised user has an avatar, it will be cleared. However,
// to clear an avatar call the convenience method
// |ClearSupervisedUserAvatar()|.
// Returns true if the avatar value is changed (either updated or cleared)
// and false otherwise.
bool UpdateSupervisedUserAvatarIfNeeded(const std::string& id,
int avatar_index);
void ClearSupervisedUserAvatar(const std::string& id);
// Returns a dictionary containing all supervised users supervised by this
// custodian. This method should only be called once this service has started
// syncing supervised users (i.e. has finished its initial merge of local and
// server-side data, via MergeDataAndStartSyncing), as the stored data might
// be outdated before that.
const base::DictionaryValue* GetSupervisedUsers();
// Calls the passed |callback| with a dictionary containing all supervised
// users managed by this custodian.
void GetSupervisedUsersAsync(const SupervisedUsersCallback& callback);
// KeyedService implementation:
void Shutdown() override;
// SyncableService implementation:
syncer::SyncMergeResult MergeDataAndStartSyncing(
syncer::ModelType type,
const syncer::SyncDataList& initial_sync_data,
scoped_ptr<syncer::SyncChangeProcessor> sync_processor,
scoped_ptr<syncer::SyncErrorFactory> error_handler) override;
void StopSyncing(syncer::ModelType type) override;
syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const override;
syncer::SyncError ProcessSyncChanges(
const tracked_objects::Location& from_here,
const syncer::SyncChangeList& change_list) override;
private:
friend class SupervisedUserSyncServiceFactory;
// Use |SupervisedUserSyncServiceFactory::GetForProfile(...)| to get an
// instance of this service.
explicit SupervisedUserSyncService(PrefService* prefs);
void OnLastSignedInUsernameChange();
scoped_ptr<base::DictionaryValue> CreateDictionary(
const std::string& name,
const std::string& master_key,
const std::string& signature_key,
const std::string& encryption_key,
int avatar_index);
void UpdateSupervisedUserImpl(const std::string& id,
const std::string& name,
const std::string& master_key,
const std::string& signature_key,
const std::string& encryption_key,
int avatar_index,
bool add_user);
void NotifySupervisedUserAcknowledged(const std::string& supervised_user_id);
void NotifySupervisedUsersSyncingStopped();
void NotifySupervisedUsersChanged();
void DispatchCallbacks();
PrefService* prefs_;
PrefChangeRegistrar pref_change_registrar_;
scoped_ptr<syncer::SyncChangeProcessor> sync_processor_;
scoped_ptr<syncer::SyncErrorFactory> error_handler_;
ObserverList<SupervisedUserSyncServiceObserver> observers_;
std::vector<SupervisedUsersCallback> callbacks_;
DISALLOW_COPY_AND_ASSIGN(SupervisedUserSyncService);
};
#endif // CHROME_BROWSER_SUPERVISED_USER_LEGACY_SUPERVISED_USER_SYNC_SERVICE_H_
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