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| 1 // Copyright 2013 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/managed_mode/managed_user_settings_service.h" | |
| 6 | |
| 7 #include "base/callback.h" | |
| 8 #include "base/json/json_reader.h" | |
| 9 #include "base/json/json_writer.h" | |
| 10 #include "base/prefs/json_pref_store.h" | |
| 11 #include "base/strings/string_util.h" | |
| 12 #include "base/threading/sequenced_worker_pool.h" | |
| 13 #include "chrome/browser/managed_mode/managed_mode_url_filter.h" | |
| 14 #include "chrome/browser/prefs/incognito_mode_prefs.h" | |
| 15 #include "chrome/common/chrome_constants.h" | |
| 16 #include "content/public/browser/browser_thread.h" | |
| 17 #include "content/public/browser/user_metrics.h" | |
| 18 | |
| 19 using base::DictionaryValue; | |
| 20 using base::Value; | |
| 21 using content::BrowserThread; | |
| 22 using content::UserMetricsAction; | |
| 23 | |
| 24 const char kAtomicSettings[] = "atomic_settings"; | |
| 25 const char kManagedUserInternalItemPrefix[] = "X-"; | |
| 26 const char kQueuedItems[] = "queued_items"; | |
| 27 const char kSplitSettingKeySeparator = ':'; | |
| 28 const char kSplitSettings[] = "split_settings"; | |
| 29 | |
| 30 namespace { | |
| 31 | |
| 32 bool SettingShouldApplyToPrefs(const std::string& name) { | |
| 33 return !StartsWithASCII(name, kManagedUserInternalItemPrefix, false); | |
| 34 } | |
| 35 | |
| 36 } // namespace | |
| 37 | |
| 38 ManagedUserSettingsService::ManagedUserSettingsService() | |
| 39 : active_(false), local_settings_(new DictionaryValue) {} | |
| 40 | |
| 41 ManagedUserSettingsService::~ManagedUserSettingsService() {} | |
| 42 | |
| 43 void ManagedUserSettingsService::Init( | |
| 44 scoped_refptr<PersistentPrefStore> store) { | |
| 45 DCHECK(!store_); | |
| 46 store_ = store; | |
| 47 store_->AddObserver(this); | |
| 48 } | |
| 49 | |
| 50 void ManagedUserSettingsService::Subscribe(const SettingsCallback& callback) { | |
| 51 if (IsReady()) { | |
| 52 scoped_ptr<base::DictionaryValue> settings = GetSettings(); | |
| 53 callback.Run(settings.get()); | |
| 54 } | |
| 55 | |
| 56 subscribers_.push_back(callback); | |
| 57 } | |
| 58 | |
| 59 void ManagedUserSettingsService::Activate() { | |
| 60 active_ = true; | |
| 61 InformSubscribers(); | |
| 62 } | |
| 63 | |
| 64 bool ManagedUserSettingsService::IsReady() { | |
| 65 return store_->IsInitializationComplete(); | |
| 66 } | |
| 67 | |
| 68 void ManagedUserSettingsService::Clear() { | |
| 69 store_->RemoveValue(kAtomicSettings); | |
| 70 store_->RemoveValue(kSplitSettings); | |
| 71 } | |
| 72 void ManagedUserSettingsService::SetLocalSettingForTesting( | |
| 73 const std::string& key, | |
| 74 scoped_ptr<Value> value) { | |
| 75 if (value) | |
| 76 local_settings_->SetWithoutPathExpansion(key, value.release()); | |
| 77 else | |
| 78 local_settings_->RemoveWithoutPathExpansion(key, NULL); | |
| 79 | |
| 80 InformSubscribers(); | |
| 81 } | |
| 82 | |
| 83 void ManagedUserSettingsService::Shutdown() { | |
| 84 store_->RemoveObserver(this); | |
| 85 } | |
| 86 void ManagedUserSettingsService::OnPrefValueChanged(const std::string& key) {} | |
| 87 | |
| 88 void ManagedUserSettingsService::OnInitializationCompleted(bool success) { | |
| 89 DCHECK(success); | |
| 90 DCHECK(IsReady()); | |
| 91 InformSubscribers(); | |
| 92 } | |
| 93 | |
| 94 DictionaryValue* ManagedUserSettingsService::GetOrCreateDictionary( | |
| 95 const std::string& key) const { | |
| 96 Value* value = NULL; | |
| 97 DictionaryValue* dict = NULL; | |
| 98 if (store_->GetMutableValue(key, &value)) { | |
| 99 bool success = value->GetAsDictionary(&dict); | |
| 100 DCHECK(success); | |
| 101 } else { | |
| 102 dict = new base::DictionaryValue; | |
| 103 store_->SetValue(key, dict); | |
| 104 } | |
| 105 | |
| 106 return dict; | |
| 107 } | |
| 108 | |
| 109 DictionaryValue* ManagedUserSettingsService::GetAtomicSettings() const { | |
| 110 return GetOrCreateDictionary(kAtomicSettings); | |
| 111 } | |
| 112 | |
| 113 DictionaryValue* ManagedUserSettingsService::GetSplitSettings() const { | |
| 114 return GetOrCreateDictionary(kSplitSettings); | |
| 115 } | |
| 116 | |
| 117 DictionaryValue* ManagedUserSettingsService::GetQueuedItems() const { | |
| 118 return GetOrCreateDictionary(kQueuedItems); | |
| 119 } | |
| 120 | |
| 121 scoped_ptr<DictionaryValue> ManagedUserSettingsService::GetSettings() { | |
| 122 DCHECK(IsReady()); | |
| 123 if (!active_) | |
| 124 return scoped_ptr<base::DictionaryValue>(); | |
| 125 | |
| 126 scoped_ptr<DictionaryValue> settings(local_settings_->DeepCopy()); | |
| 127 | |
| 128 DictionaryValue* atomic_settings = GetAtomicSettings(); | |
| 129 for (DictionaryValue::Iterator it(*atomic_settings); !it.IsAtEnd(); | |
| 130 it.Advance()) { | |
| 131 if (!SettingShouldApplyToPrefs(it.key())) | |
| 132 continue; | |
| 133 | |
| 134 settings->Set(it.key(), it.value().DeepCopy()); | |
| 135 } | |
| 136 | |
| 137 DictionaryValue* split_settings = GetSplitSettings(); | |
| 138 for (DictionaryValue::Iterator it(*split_settings); !it.IsAtEnd(); | |
| 139 it.Advance()) { | |
| 140 if (!SettingShouldApplyToPrefs(it.key())) | |
| 141 continue; | |
| 142 | |
| 143 settings->Set(it.key(), it.value().DeepCopy()); | |
| 144 } | |
| 145 | |
| 146 return settings.Pass(); | |
| 147 } | |
| 148 | |
| 149 void ManagedUserSettingsService::InformSubscribers() { | |
| 150 if (!IsReady()) | |
| 151 return; | |
| 152 | |
| 153 scoped_ptr<base::DictionaryValue> settings = GetSettings(); | |
| 154 for (std::vector<SettingsCallback>::iterator it = subscribers_.begin(); | |
| 155 it != subscribers_.end(); ++it) { | |
| 156 it->Run(settings.get()); | |
| 157 } | |
| 158 } | |
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