src/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/prefs/pref_value_map.h"
  11 #include "base/values.h"
  12 #include "chrome/browser/prefs/incognito_mode_prefs.h"
  13 #include "chrome/browser/supervised_user/supervised_user_constants.h"
  14 #include "chrome/browser/supervised_user/supervised_user_settings_service.h"
  15 #include "chrome/browser/supervised_user/supervised_user_url_filter.h"
  16 #include "chrome/common/pref_names.h"
  17
  18 using base::FundamentalValue;
  19
  20 namespace {
  21
  22 struct SupervisedUserSettingsPrefMappingEntry {
  23   const char* settings_name;
  24   const char* pref_name;
  25 };
  26
  27 SupervisedUserSettingsPrefMappingEntry kSupervisedUserSettingsPrefMapping[] = {
  28   {
  29     supervised_users::kContentPackDefaultFilteringBehavior,
  30     prefs::kDefaultSupervisedUserFilteringBehavior,
  31   },
  32   {
  33     supervised_users::kContentPackManualBehaviorHosts,
  34     prefs::kSupervisedUserManualHosts,
  35   },
  36   {
  37     supervised_users::kContentPackManualBehaviorURLs,
  38     prefs::kSupervisedUserManualURLs,
  39   },
  40   {
  41     supervised_users::kForceSafeSearch, prefs::kForceSafeSearch,
  42   },
  43   {
  44     supervised_users::kRecordHistory, prefs::kRecordHistory,
  45   },
  46   {
  47     supervised_users::kSigninAllowed, prefs::kSigninAllowed,
  48   },
  49   {
  50     supervised_users::kUserName, prefs::kProfileName,
  51   },
  52 };
  53
  54 }  // namespace
  55
  56 SupervisedUserPrefStore::SupervisedUserPrefStore(
  57     SupervisedUserSettingsService* supervised_user_settings_service)
  58     : weak_ptr_factory_(this) {
  59   supervised_user_settings_service->Subscribe(
  60       base::Bind(&SupervisedUserPrefStore::OnNewSettingsAvailable,
  61                  weak_ptr_factory_.GetWeakPtr()));
  62 }
  63
  64 bool SupervisedUserPrefStore::GetValue(const std::string& key,
  65                                        const base::Value** value) const {
  66   DCHECK(prefs_);
  67   return prefs_->GetValue(key, value);
  68 }
  69
  70 void SupervisedUserPrefStore::AddObserver(PrefStore::Observer* observer) {
  71   observers_.AddObserver(observer);
  72 }
  73
  74 void SupervisedUserPrefStore::RemoveObserver(PrefStore::Observer* observer) {
  75   observers_.RemoveObserver(observer);
  76 }
  77
  78 bool SupervisedUserPrefStore::HasObservers() const {
  79   return observers_.might_have_observers();
  80 }
  81
  82 bool SupervisedUserPrefStore::IsInitializationComplete() const {
  83   return !!prefs_;
  84 }
  85
  86 SupervisedUserPrefStore::~SupervisedUserPrefStore() {
  87 }
  88
  89 void SupervisedUserPrefStore::OnNewSettingsAvailable(
  90     const base::DictionaryValue* settings) {
  91   scoped_ptr<PrefValueMap> old_prefs = prefs_.Pass();
  92   prefs_.reset(new PrefValueMap);
  93   if (settings) {
  94     // Set hardcoded prefs.
  95     prefs_->SetValue(prefs::kAllowDeletingBrowserHistory,
  96                      new FundamentalValue(false));
  97     prefs_->SetValue(prefs::kDefaultSupervisedUserFilteringBehavior,
  98                      new FundamentalValue(SupervisedUserURLFilter::ALLOW));
  99     prefs_->SetValue(prefs::kForceSafeSearch, new FundamentalValue(true));
 100     prefs_->SetValue(prefs::kRecordHistory, new FundamentalValue(true));
 101     prefs_->SetValue(prefs::kHideWebStoreIcon, new FundamentalValue(true));
 102     prefs_->SetValue(prefs::kIncognitoModeAvailability,
 103                      new FundamentalValue(IncognitoModePrefs::DISABLED));
 104     prefs_->SetValue(prefs::kSigninAllowed, new FundamentalValue(false));
 105
 106     // Copy supervised user settings to prefs.
 107     for (size_t i = 0; i < arraysize(kSupervisedUserSettingsPrefMapping); ++i) {
 108       const SupervisedUserSettingsPrefMappingEntry& entry =
 109           kSupervisedUserSettingsPrefMapping[i];
 110       const base::Value* value = NULL;
 111       if (settings->GetWithoutPathExpansion(entry.settings_name, &value))
 112         prefs_->SetValue(entry.pref_name, value->DeepCopy());
 113     }
 114   }
 115
 116   if (!old_prefs) {
 117     FOR_EACH_OBSERVER(Observer, observers_, OnInitializationCompleted(true));
 118     return;
 119   }
 120
 121   std::vector<std::string> changed_prefs;
 122   prefs_->GetDifferingKeys(old_prefs.get(), &changed_prefs);
 123
 124   // Send out change notifications.
 125   for (const std::string& pref : changed_prefs) {
 126     FOR_EACH_OBSERVER(Observer, observers_, OnPrefValueChanged(pref));
 127   }
 128 }