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// Copyright (c) 2012 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/sync/invalidations/invalidator_storage.h"
#include "base/base64.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/string_number_conversions.h"
#include "base/values.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/common/pref_names.h"
#include "sync/internal_api/public/syncable/model_type.h"
using csync::InvalidationVersionMap;
namespace browser_sync {
namespace {
const char kSourceKey[] = "source";
const char kNameKey[] = "name";
const char kMaxVersionKey[] = "max-version";
bool ValueToObjectIdAndVersion(const DictionaryValue& value,
invalidation::ObjectId* id,
int64* max_version) {
std::string source_str;
int source = 0;
std::string name;
std::string max_version_str;
if (!value.GetString(kSourceKey, &source_str)) {
DLOG(WARNING) << "Unable to deserialize source";
return false;
}
if (!value.GetString(kNameKey, &name)) {
DLOG(WARNING) << "Unable to deserialize name";
return false;
}
if (!value.GetString(kMaxVersionKey, &max_version_str)) {
DLOG(WARNING) << "Unable to deserialize max version";
return false;
}
if (!base::StringToInt(source_str, &source)) {
DLOG(WARNING) << "Invalid source: " << source_str;
return false;
}
if (!base::StringToInt64(max_version_str, max_version)) {
DLOG(WARNING) << "Invalid max invalidation version: " << max_version_str;
return false;
}
*id = invalidation::ObjectId(source, name);
return true;
}
// The caller owns the returned value.
DictionaryValue* ObjectIdAndVersionToValue(const invalidation::ObjectId& id,
int64 max_version) {
DictionaryValue* value = new DictionaryValue;
value->SetString(kSourceKey, base::IntToString(id.source()));
value->SetString(kNameKey, id.name());
value->SetString(kMaxVersionKey, base::Int64ToString(max_version));
return value;
}
} // namespace
InvalidatorStorage::InvalidatorStorage(PrefService* pref_service)
: pref_service_(pref_service) {
// TODO(tim): Create a Mock instead of maintaining the if(!pref_service_) case
// throughout this file. This is a problem now due to lack of injection at
// ProfileSyncService. Bug 130176.
if (pref_service_) {
pref_service_->RegisterListPref(prefs::kInvalidatorMaxInvalidationVersions,
PrefService::UNSYNCABLE_PREF);
pref_service_->RegisterStringPref(prefs::kInvalidatorInvalidationState,
std::string(),
PrefService::UNSYNCABLE_PREF);
MigrateMaxInvalidationVersionsPref();
}
}
InvalidatorStorage::~InvalidatorStorage() {
}
InvalidationVersionMap InvalidatorStorage::GetAllMaxVersions() const {
DCHECK(non_thread_safe_.CalledOnValidThread());
InvalidationVersionMap max_versions;
if (!pref_service_) {
return max_versions;
}
const base::ListValue* max_versions_list =
pref_service_->GetList(prefs::kInvalidatorMaxInvalidationVersions);
CHECK(max_versions_list);
DeserializeFromList(*max_versions_list, &max_versions);
return max_versions;
}
void InvalidatorStorage::SetMaxVersion(const invalidation::ObjectId& id,
int64 max_version) {
DCHECK(non_thread_safe_.CalledOnValidThread());
CHECK(pref_service_);
InvalidationVersionMap max_versions = GetAllMaxVersions();
InvalidationVersionMap::iterator it = max_versions.find(id);
if ((it != max_versions.end()) && (max_version <= it->second)) {
NOTREACHED();
return;
}
max_versions[id] = max_version;
base::ListValue max_versions_list;
SerializeToList(max_versions, &max_versions_list);
pref_service_->Set(prefs::kInvalidatorMaxInvalidationVersions,
max_versions_list);
}
// static
void InvalidatorStorage::DeserializeFromList(
const base::ListValue& max_versions_list,
InvalidationVersionMap* max_versions_map) {
max_versions_map->clear();
for (size_t i = 0; i < max_versions_list.GetSize(); ++i) {
DictionaryValue* value = NULL;
if (!max_versions_list.GetDictionary(i, &value)) {
DLOG(WARNING) << "Unable to deserialize entry " << i;
continue;
}
invalidation::ObjectId id;
int64 max_version = 0;
if (!ValueToObjectIdAndVersion(*value, &id, &max_version)) {
DLOG(WARNING) << "Error while deserializing entry " << i;
continue;
}
(*max_versions_map)[id] = max_version;
}
}
// static
void InvalidatorStorage::SerializeToList(
const InvalidationVersionMap& max_versions_map,
base::ListValue* max_versions_list) {
for (InvalidationVersionMap::const_iterator it = max_versions_map.begin();
it != max_versions_map.end(); ++it) {
max_versions_list->Append(ObjectIdAndVersionToValue(it->first, it->second));
}
}
// Legacy migration code.
void InvalidatorStorage::MigrateMaxInvalidationVersionsPref() {
pref_service_->RegisterDictionaryPref(prefs::kSyncMaxInvalidationVersions,
PrefService::UNSYNCABLE_PREF);
const base::DictionaryValue* max_versions_dict =
pref_service_->GetDictionary(prefs::kSyncMaxInvalidationVersions);
CHECK(max_versions_dict);
if (!max_versions_dict->empty()) {
InvalidationVersionMap max_versions;
DeserializeMap(max_versions_dict, &max_versions);
base::ListValue max_versions_list;
SerializeToList(max_versions, &max_versions_list);
pref_service_->Set(prefs::kInvalidatorMaxInvalidationVersions,
max_versions_list);
UMA_HISTOGRAM_BOOLEAN("InvalidatorStorage.MigrateInvalidationVersionsPref",
true);
} else {
UMA_HISTOGRAM_BOOLEAN("InvalidatorStorage.MigrateInvalidationVersionsPref",
false);
}
pref_service_->ClearPref(prefs::kSyncMaxInvalidationVersions);
}
// Legacy migration code.
// static
void InvalidatorStorage::DeserializeMap(
const base::DictionaryValue* max_versions_dict,
InvalidationVersionMap* map) {
map->clear();
// Convert from a string -> string DictionaryValue to a
// ModelType -> int64 map.
for (base::DictionaryValue::key_iterator it =
max_versions_dict->begin_keys();
it != max_versions_dict->end_keys(); ++it) {
int model_type_int = 0;
if (!base::StringToInt(*it, &model_type_int)) {
LOG(WARNING) << "Invalid model type key: " << *it;
continue;
}
if ((model_type_int < syncable::FIRST_REAL_MODEL_TYPE) ||
(model_type_int >= syncable::MODEL_TYPE_COUNT)) {
LOG(WARNING) << "Out-of-range model type key: " << model_type_int;
continue;
}
const syncable::ModelType model_type =
syncable::ModelTypeFromInt(model_type_int);
std::string max_version_str;
CHECK(max_versions_dict->GetString(*it, &max_version_str));
int64 max_version = 0;
if (!base::StringToInt64(max_version_str, &max_version)) {
LOG(WARNING) << "Invalid max invalidation version for "
<< syncable::ModelTypeToString(model_type) << ": "
<< max_version_str;
continue;
}
invalidation::ObjectId id;
if (!csync::RealModelTypeToObjectId(model_type, &id)) {
DLOG(WARNING) << "Invalid model type: " << model_type;
continue;
}
(*map)[id] = max_version;
}
}
std::string InvalidatorStorage::GetInvalidationState() const {
std::string utf8_state(pref_service_ ?
pref_service_->GetString(prefs::kInvalidatorInvalidationState) : "");
std::string state_data;
base::Base64Decode(utf8_state, &state_data);
return state_data;
}
void InvalidatorStorage::SetInvalidationState(const std::string& state) {
DCHECK(non_thread_safe_.CalledOnValidThread());
std::string utf8_state;
base::Base64Encode(state, &utf8_state);
pref_service_->SetString(prefs::kInvalidatorInvalidationState,
utf8_state);
}
void InvalidatorStorage::Clear() {
DCHECK(non_thread_safe_.CalledOnValidThread());
pref_service_->ClearPref(prefs::kInvalidatorMaxInvalidationVersions);
pref_service_->ClearPref(prefs::kInvalidatorInvalidationState);
}
} // namespace browser_sync
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