src/chrome/browser/chromeos/login/users/avatar/user_image_sync_observer.cc

   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 #include "chrome/browser/chromeos/login/users/avatar/user_image_sync_observer.h"
   6
   7 #include "base/bind.h"
   8 #include "base/prefs/pref_change_registrar.h"
   9 #include "base/prefs/scoped_user_pref_update.h"
  10 #include "chrome/browser/chrome_notification_types.h"
  11 #include "chrome/browser/chromeos/login/screens/user_image_screen.h"
  12 #include "chrome/browser/chromeos/login/users/avatar/user_image_manager.h"
  13 #include "chrome/browser/chromeos/login/users/chrome_user_manager.h"
  14 #include "chrome/browser/chromeos/login/wizard_controller.h"
  15 #include "chrome/browser/chromeos/profiles/profile_helper.h"
  16 #include "chrome/browser/prefs/pref_service_syncable.h"
  17 #include "chrome/common/pref_names.h"
  18 #include "components/user_manager/user.h"
  19 #include "components/user_manager/user_image/default_user_images.h"
  20 #include "components/user_manager/user_manager.h"
  21 #include "content/public/browser/notification_registrar.h"
  22 #include "content/public/browser/notification_service.h"
  23
  24 namespace chromeos {
  25 namespace {
  26
  27 // A dictionary containing info about user image.
  28 const char kUserImageInfo[] = "user_image_info";
  29 // Path to value with image index.
  30 const char kImageIndex[] = "image_index";
  31
  32 bool IsIndexSupported(int index) {
  33   return (index >= user_manager::kFirstDefaultImageIndex &&
  34           index < user_manager::kDefaultImagesCount) ||
  35          (index == user_manager::User::USER_IMAGE_PROFILE);
  36 }
  37
  38 }  // anonymous namespace
  39
  40 UserImageSyncObserver::Observer::~Observer() {}
  41
  42 UserImageSyncObserver::UserImageSyncObserver(const user_manager::User* user)
  43     : user_(user),
  44       prefs_(NULL),
  45       is_synced_(false),
  46       local_image_changed_(false) {
  47   notification_registrar_.reset(new content::NotificationRegistrar);
  48   notification_registrar_->Add(this,
  49       chrome::NOTIFICATION_LOGIN_USER_IMAGE_CHANGED,
  50       content::NotificationService::AllSources());
  51   if (Profile* profile = ProfileHelper::Get()->GetProfileByUser(user)) {
  52     OnProfileGained(profile);
  53   } else {
  54     notification_registrar_->Add(this,
  55         chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED,
  56         content::NotificationService::AllSources());
  57   }
  58 }
  59
  60 UserImageSyncObserver::~UserImageSyncObserver() {
  61   if (!is_synced_ && prefs_)
  62     prefs_->RemoveObserver(this);
  63   if (pref_change_registrar_)
  64     pref_change_registrar_->RemoveAll();
  65 }
  66
  67 // static
  68 void UserImageSyncObserver::RegisterProfilePrefs(
  69     user_prefs::PrefRegistrySyncable* registry_) {
  70   registry_->RegisterDictionaryPref(
  71       kUserImageInfo,
  72       user_prefs::PrefRegistrySyncable::SYNCABLE_PRIORITY_PREF);
  73 }
  74
  75 void UserImageSyncObserver::AddObserver(Observer* observer) {
  76   observer_list_.AddObserver(observer);
  77 }
  78
  79 void UserImageSyncObserver::RemoveObserver(Observer* observer) {
  80   observer_list_.RemoveObserver(observer);
  81 }
  82
  83 void UserImageSyncObserver::OnProfileGained(Profile* profile) {
  84   prefs_ = PrefServiceSyncable::FromProfile(profile);
  85   pref_change_registrar_.reset(new PrefChangeRegistrar);
  86   pref_change_registrar_->Init(prefs_);
  87   pref_change_registrar_->Add(kUserImageInfo,
  88       base::Bind(&UserImageSyncObserver::OnPreferenceChanged,
  89                  base::Unretained(this)));
  90   is_synced_ = prefs_->IsPrioritySyncing();
  91   if (!is_synced_) {
  92     prefs_->AddObserver(this);
  93   } else {
  94     OnInitialSync();
  95   }
  96 }
  97
  98 void UserImageSyncObserver::OnInitialSync() {
  99   int synced_index;
 100   bool local_image_updated = false;
 101   if (!GetSyncedImageIndex(&synced_index) || local_image_changed_) {
 102     UpdateSyncedImageFromLocal();
 103   } else if (IsIndexSupported(synced_index) && CanUpdateLocalImageNow()) {
 104     UpdateLocalImageFromSynced();
 105     local_image_updated = true;
 106   }
 107   FOR_EACH_OBSERVER(UserImageSyncObserver::Observer, observer_list_,
 108       OnInitialSync(local_image_updated));
 109 }
 110
 111 void UserImageSyncObserver::OnPreferenceChanged(const std::string& pref_name) {
 112   // OnPreferenceChanged can be called before OnIsSyncingChanged.
 113   if (!is_synced_) {
 114     is_synced_ = true;
 115     prefs_->RemoveObserver(this);
 116     OnInitialSync();
 117   } else if (CanUpdateLocalImageNow()) {
 118     UpdateLocalImageFromSynced();
 119   }
 120 }
 121
 122 void UserImageSyncObserver::Observe(
 123     int type,
 124     const content::NotificationSource& source,
 125     const content::NotificationDetails& details) {
 126   if (type == chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED) {
 127     if (Profile* profile = ProfileHelper::Get()->GetProfileByUser(user_)) {
 128       notification_registrar_->Remove(
 129           this,
 130           chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED,
 131           content::NotificationService::AllSources());
 132       OnProfileGained(profile);
 133     }
 134   } else if (type == chrome::NOTIFICATION_LOGIN_USER_IMAGE_CHANGED) {
 135     if (is_synced_)
 136       UpdateSyncedImageFromLocal();
 137     else
 138       local_image_changed_ = true;
 139   } else {
 140     NOTREACHED();
 141   }
 142 }
 143
 144 void UserImageSyncObserver::OnIsSyncingChanged() {
 145   is_synced_ = prefs_->IsPrioritySyncing();
 146   if (is_synced_) {
 147     prefs_->RemoveObserver(this);
 148     OnInitialSync();
 149   }
 150 }
 151
 152 void UserImageSyncObserver::UpdateSyncedImageFromLocal() {
 153   int local_index = user_->image_index();
 154   if (!IsIndexSupported(local_index)) {
 155     local_index = user_manager::User::USER_IMAGE_INVALID;
 156   }
 157   int synced_index;
 158   if (GetSyncedImageIndex(&synced_index) && (synced_index == local_index))
 159     return;
 160   DictionaryPrefUpdate update(prefs_, kUserImageInfo);
 161   base::DictionaryValue* dict = update.Get();
 162   dict->SetInteger(kImageIndex, local_index);
 163   VLOG(1) << "Saved avatar index " << local_index << " to sync.";
 164 }
 165
 166 void UserImageSyncObserver::UpdateLocalImageFromSynced() {
 167   int synced_index;
 168   GetSyncedImageIndex(&synced_index);
 169   int local_index = user_->image_index();
 170   if ((synced_index == local_index) || !IsIndexSupported(synced_index))
 171     return;
 172   UserImageManager* image_manager =
 173       ChromeUserManager::Get()->GetUserImageManager(user_->email());
 174   if (synced_index == user_manager::User::USER_IMAGE_PROFILE) {
 175     image_manager->SaveUserImageFromProfileImage();
 176   } else {
 177     image_manager->SaveUserDefaultImageIndex(synced_index);
 178   }
 179   VLOG(1) << "Loaded avatar index " << synced_index << " from sync.";
 180 }
 181
 182 bool UserImageSyncObserver::GetSyncedImageIndex(int* index) {
 183   *index = user_manager::User::USER_IMAGE_INVALID;
 184   const base::DictionaryValue* dict = prefs_->GetDictionary(kUserImageInfo);
 185   return dict && dict->GetInteger(kImageIndex, index);
 186 }
 187
 188 bool UserImageSyncObserver::CanUpdateLocalImageNow() {
 189   if (WizardController* wizard_controller =
 190           WizardController::default_controller()) {
 191     UserImageScreen* screen = UserImageScreen::Get(wizard_controller);
 192     if (wizard_controller->current_screen() == screen) {
 193       if (screen->user_selected_image())
 194         return false;
 195     }
 196   }
 197   return true;
 198 }
 199
 200 }  // namespace chromeos
 201