chrome/browser/supervised_user/supervised_user_pref_store.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/supervised_user/supervised_user_pref_store.h"
   6
   7 #include <vector>
   8
   9 #include "base/bind.h"
  10 #include "base/command_line.h"
  11 #include "base/prefs/pref_value_map.h"
  12 #include "base/values.h"
  13 #include "chrome/browser/prefs/incognito_mode_prefs.h"
  14 #include "chrome/browser/supervised_user/supervised_user_bookmarks_handler.h"
  15 #include "chrome/browser/supervised_user/supervised_user_constants.h"
  16 #include "chrome/browser/supervised_user/supervised_user_settings_service.h"
  17 #include "chrome/browser/supervised_user/supervised_user_url_filter.h"
  18 #include "chrome/common/chrome_switches.h"
  19 #include "chrome/common/pref_names.h"
  20 #include "components/bookmarks/common/bookmark_pref_names.h"
  21
  22 namespace {
  23
  24 struct SupervisedUserSettingsPrefMappingEntry {
  25   const char* settings_name;
  26   const char* pref_name;
  27 };
  28
  29 SupervisedUserSettingsPrefMappingEntry kSupervisedUserSettingsPrefMapping[] = {
  30   {
  31     supervised_users::kContentPackDefaultFilteringBehavior,
  32     prefs::kDefaultSupervisedUserFilteringBehavior,
  33   },
  34   {
  35     supervised_users::kContentPackManualBehaviorHosts,
  36     prefs::kSupervisedUserManualHosts,
  37   },
  38   {
  39     supervised_users::kContentPackManualBehaviorURLs,
  40     prefs::kSupervisedUserManualURLs,
  41   },
  42   {
  43     supervised_users::kForceSafeSearch, prefs::kForceGoogleSafeSearch,
  44   },
  45   {
  46     supervised_users::kForceSafeSearch, prefs::kForceYouTubeSafetyMode,
  47   },
  48   {
  49     supervised_users::kRecordHistory, prefs::kRecordHistory,
  50   },
  51   {
  52     supervised_users::kSigninAllowed, prefs::kSigninAllowed,
  53   },
  54   {
  55     supervised_users::kUserName, prefs::kProfileName,
  56   },
  57 };
  58
  59 }  // namespace
  60
  61 SupervisedUserPrefStore::SupervisedUserPrefStore(
  62     SupervisedUserSettingsService* supervised_user_settings_service)
  63     : weak_ptr_factory_(this) {
  64   supervised_user_settings_service->Subscribe(
  65       base::Bind(&SupervisedUserPrefStore::OnNewSettingsAvailable,
  66                  weak_ptr_factory_.GetWeakPtr()));
  67 }
  68
  69 bool SupervisedUserPrefStore::GetValue(const std::string& key,
  70                                        const base::Value** value) const {
  71   // TODO(bauerb): Temporary CHECK to force a clean crash while investigating
  72   // https://crbug.com/425785. Remove (or change back to DCHECK) once the bug
  73   // is fixed.
  74   CHECK(prefs_);
  75   return prefs_->GetValue(key, value);
  76 }
  77
  78 void SupervisedUserPrefStore::AddObserver(PrefStore::Observer* observer) {
  79   observers_.AddObserver(observer);
  80 }
  81
  82 void SupervisedUserPrefStore::RemoveObserver(PrefStore::Observer* observer) {
  83   observers_.RemoveObserver(observer);
  84 }
  85
  86 bool SupervisedUserPrefStore::HasObservers() const {
  87   return observers_.might_have_observers();
  88 }
  89
  90 bool SupervisedUserPrefStore::IsInitializationComplete() const {
  91   return !!prefs_;
  92 }
  93
  94 SupervisedUserPrefStore::~SupervisedUserPrefStore() {
  95 }
  96
  97 void SupervisedUserPrefStore::OnNewSettingsAvailable(
  98     const base::DictionaryValue* settings) {
  99   scoped_ptr<PrefValueMap> old_prefs = prefs_.Pass();
 100   prefs_.reset(new PrefValueMap);
 101   if (settings) {
 102     // Set hardcoded prefs and defaults.
 103     prefs_->SetBoolean(prefs::kAllowDeletingBrowserHistory, false);
 104     prefs_->SetInteger(prefs::kDefaultSupervisedUserFilteringBehavior,
 105                        SupervisedUserURLFilter::ALLOW);
 106     prefs_->SetBoolean(prefs::kForceGoogleSafeSearch, true);
 107     prefs_->SetBoolean(prefs::kForceYouTubeSafetyMode, true);
 108     prefs_->SetBoolean(prefs::kHideWebStoreIcon, true);
 109     prefs_->SetInteger(prefs::kIncognitoModeAvailability,
 110                        IncognitoModePrefs::DISABLED);
 111     prefs_->SetBoolean(prefs::kRecordHistory, true);
 112     prefs_->SetBoolean(prefs::kSigninAllowed, false);
 113
 114     // Copy supervised user settings to prefs.
 115     for (const auto& entry : kSupervisedUserSettingsPrefMapping) {
 116       const base::Value* value = NULL;
 117       if (settings->GetWithoutPathExpansion(entry.settings_name, &value))
 118         prefs_->SetValue(entry.pref_name, value->CreateDeepCopy());
 119     }
 120
 121     // Manually set preferences that aren't direct copies of the settings value.
 122     bool record_history;
 123     if (settings->GetBoolean(supervised_users::kRecordHistory,
 124                              &record_history)) {
 125       prefs_->SetBoolean(prefs::kAllowDeletingBrowserHistory, !record_history);
 126       prefs_->SetInteger(prefs::kIncognitoModeAvailability,
 127                          record_history ? IncognitoModePrefs::DISABLED
 128                                         : IncognitoModePrefs::ENABLED);
 129     }
 130
 131     if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 132             switches::kEnableSupervisedUserManagedBookmarksFolder)) {
 133       // Reconstruct bookmarks from split settings.
 134       prefs_->SetValue(
 135           bookmarks::prefs::kSupervisedBookmarks,
 136           SupervisedUserBookmarksHandler::BuildBookmarksTree(*settings).Pass());
 137     }
 138   }
 139
 140   if (!old_prefs) {
 141     FOR_EACH_OBSERVER(Observer, observers_, OnInitializationCompleted(true));
 142     return;
 143   }
 144
 145   std::vector<std::string> changed_prefs;
 146   prefs_->GetDifferingKeys(old_prefs.get(), &changed_prefs);
 147
 148   // Send out change notifications.
 149   for (const std::string& pref : changed_prefs) {
 150     FOR_EACH_OBSERVER(Observer, observers_, OnPrefValueChanged(pref));
 151   }
 152 }