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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.
#include "chrome/browser/prefs/tracked/pref_service_hash_store_contents.h"
#include "base/prefs/pref_registry_simple.h"
#include "base/prefs/pref_service.h"
#include "base/prefs/scoped_user_pref_update.h"
#include "base/values.h"
namespace {
// Implements get-or-create of a dictionary value and holds a
// DictionaryPrefUpdate.
class PrefServiceMutableDictionary
: public HashStoreContents::MutableDictionary {
public:
// Creates an instance that provides mutable access to a dictionary value
// named |key| that is a child of |kProfilePreferenceHashes| in
// |prefs|.
PrefServiceMutableDictionary(const std::string& key,
PrefService* pref_service);
// HashStoreContents::MutableDictionary implementation
base::DictionaryValue* operator->() override;
private:
const std::string key_;
DictionaryPrefUpdate update_;
};
PrefServiceMutableDictionary::PrefServiceMutableDictionary(
const std::string& key,
PrefService* pref_service)
: key_(key),
update_(pref_service,
PrefServiceHashStoreContents::kProfilePreferenceHashes) {
DCHECK(!key_.empty());
}
base::DictionaryValue* PrefServiceMutableDictionary::operator->() {
base::DictionaryValue* dictionary = NULL;
if (!update_->GetDictionaryWithoutPathExpansion(key_, &dictionary)) {
dictionary = new base::DictionaryValue;
update_->SetWithoutPathExpansion(key_, dictionary);
}
return dictionary;
}
} // namespace
// static
const char PrefServiceHashStoreContents::kProfilePreferenceHashes[] =
"profile.preference_hashes";
// static
const char PrefServiceHashStoreContents::kHashOfHashesDict[] = "hash_of_hashes";
// static
const char PrefServiceHashStoreContents::kStoreVersionsDict[] =
"store_versions";
PrefServiceHashStoreContents::PrefServiceHashStoreContents(
const std::string& hash_store_id,
PrefService* pref_service)
: hash_store_id_(hash_store_id), pref_service_(pref_service) {
// TODO(erikwright): Remove in M40+.
DictionaryPrefUpdate update(pref_service_, kProfilePreferenceHashes);
update->RemovePath(kStoreVersionsDict, NULL);
}
// static
void PrefServiceHashStoreContents::RegisterPrefs(PrefRegistrySimple* registry) {
// Register the top level dictionary to map profile names to dictionaries of
// tracked preferences.
registry->RegisterDictionaryPref(kProfilePreferenceHashes);
}
// static
void PrefServiceHashStoreContents::ResetAllPrefHashStores(
PrefService* pref_service) {
pref_service->ClearPref(kProfilePreferenceHashes);
}
std::string PrefServiceHashStoreContents::hash_store_id() const {
return hash_store_id_;
}
void PrefServiceHashStoreContents::Reset() {
DictionaryPrefUpdate update(pref_service_, kProfilePreferenceHashes);
update->RemoveWithoutPathExpansion(hash_store_id_, NULL);
// Remove this store's entry in the kHashOfHashesDict.
base::DictionaryValue* hash_of_hashes_dict;
if (update->GetDictionaryWithoutPathExpansion(kHashOfHashesDict,
&hash_of_hashes_dict)) {
hash_of_hashes_dict->RemoveWithoutPathExpansion(hash_store_id_, NULL);
if (hash_of_hashes_dict->empty())
update->RemovePath(kHashOfHashesDict, NULL);
}
if (update->empty())
pref_service_->ClearPref(kProfilePreferenceHashes);
}
bool PrefServiceHashStoreContents::IsInitialized() const {
const base::DictionaryValue* pref_hash_dicts =
pref_service_->GetDictionary(kProfilePreferenceHashes);
return pref_hash_dicts->GetDictionaryWithoutPathExpansion(hash_store_id_,
NULL);
}
const base::DictionaryValue* PrefServiceHashStoreContents::GetContents() const {
const base::DictionaryValue* pref_hash_dicts =
pref_service_->GetDictionary(kProfilePreferenceHashes);
const base::DictionaryValue* hashes_dict = NULL;
pref_hash_dicts->GetDictionaryWithoutPathExpansion(hash_store_id_,
&hashes_dict);
return hashes_dict;
}
scoped_ptr<HashStoreContents::MutableDictionary>
PrefServiceHashStoreContents::GetMutableContents() {
return scoped_ptr<HashStoreContents::MutableDictionary>(
new PrefServiceMutableDictionary(hash_store_id_, pref_service_));
}
std::string PrefServiceHashStoreContents::GetSuperMac() const {
const base::DictionaryValue* pref_hash_dicts =
pref_service_->GetDictionary(kProfilePreferenceHashes);
const base::DictionaryValue* hash_of_hashes_dict = NULL;
std::string hash_of_hashes;
if (pref_hash_dicts->GetDictionaryWithoutPathExpansion(
kHashOfHashesDict, &hash_of_hashes_dict)) {
hash_of_hashes_dict->GetStringWithoutPathExpansion(hash_store_id_,
&hash_of_hashes);
}
return hash_of_hashes;
}
void PrefServiceHashStoreContents::SetSuperMac(const std::string& super_mac) {
PrefServiceMutableDictionary(kHashOfHashesDict, pref_service_)
->SetStringWithoutPathExpansion(hash_store_id_, super_mac);
}
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