blob: 053f315bd85e0b06e743456f3dd5cc0f6ce56d4e [file] [log] [blame]
// 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 "services/preferences/tracked/tracked_split_preference.h"
#include <vector>
#include "base/check.h"
#include "base/notreached.h"
#include "base/values.h"
#include "services/preferences/public/mojom/tracked_preference_validation_delegate.mojom.h"
#include "services/preferences/tracked/pref_hash_store_transaction.h"
using ValueState =
prefs::mojom::TrackedPreferenceValidationDelegate::ValueState;
TrackedSplitPreference::TrackedSplitPreference(
const std::string& pref_path,
size_t reporting_id,
size_t reporting_ids_count,
prefs::mojom::TrackedPreferenceMetadata::EnforcementLevel enforcement_level,
prefs::mojom::TrackedPreferenceMetadata::ValueType value_type,
prefs::mojom::TrackedPreferenceValidationDelegate* delegate)
: pref_path_(pref_path),
helper_(pref_path,
reporting_id,
reporting_ids_count,
enforcement_level,
value_type),
delegate_(delegate) {}
TrackedPreferenceType TrackedSplitPreference::GetType() const {
return TrackedPreferenceType::SPLIT;
}
void TrackedSplitPreference::OnNewValue(
const base::Value* value,
PrefHashStoreTransaction* transaction) const {
const base::DictionaryValue* dict_value = NULL;
if (value && !value->GetAsDictionary(&dict_value)) {
NOTREACHED();
return;
}
transaction->StoreSplitHash(pref_path_, dict_value);
}
bool TrackedSplitPreference::EnforceAndReport(
base::DictionaryValue* pref_store_contents,
PrefHashStoreTransaction* transaction,
PrefHashStoreTransaction* external_validation_transaction) const {
base::DictionaryValue* dict_value = NULL;
if (!pref_store_contents->GetDictionary(pref_path_, &dict_value) &&
pref_store_contents->Get(pref_path_, NULL)) {
// There should be a dictionary or nothing at |pref_path_|.
NOTREACHED();
return false;
}
std::vector<std::string> invalid_keys;
ValueState value_state =
transaction->CheckSplitValue(pref_path_, dict_value, &invalid_keys);
helper_.ReportValidationResult(value_state, transaction->GetStoreUMASuffix());
ValueState external_validation_value_state = ValueState::UNSUPPORTED;
std::vector<std::string> external_validation_invalid_keys;
if (external_validation_transaction) {
external_validation_value_state =
external_validation_transaction->CheckSplitValue(
pref_path_, dict_value, &external_validation_invalid_keys);
helper_.ReportValidationResult(
external_validation_value_state,
external_validation_transaction->GetStoreUMASuffix());
}
if (delegate_) {
delegate_->OnSplitPreferenceValidation(
pref_path_, invalid_keys, external_validation_invalid_keys, value_state,
external_validation_value_state, helper_.IsPersonal());
}
TrackedPreferenceHelper::ResetAction reset_action =
helper_.GetAction(value_state);
helper_.ReportAction(reset_action);
bool was_reset = false;
if (reset_action == TrackedPreferenceHelper::DO_RESET) {
if (value_state == ValueState::CHANGED) {
DCHECK(!invalid_keys.empty());
for (std::vector<std::string>::const_iterator it = invalid_keys.begin();
it != invalid_keys.end(); ++it) {
dict_value->Remove(*it, NULL);
}
} else {
pref_store_contents->RemovePath(pref_path_, NULL);
}
was_reset = true;
}
if (value_state != ValueState::UNCHANGED) {
// Store the hash for the new value (whether it was reset or not).
const base::DictionaryValue* new_dict_value = NULL;
pref_store_contents->GetDictionary(pref_path_, &new_dict_value);
transaction->StoreSplitHash(pref_path_, new_dict_value);
}
// Update MACs in the external store if there is one and there either was a
// reset or external validation failed.
if (external_validation_transaction &&
(was_reset || external_validation_value_state != ValueState::UNCHANGED)) {
const base::DictionaryValue* new_dict_value = nullptr;
pref_store_contents->GetDictionary(pref_path_, &new_dict_value);
external_validation_transaction->StoreSplitHash(pref_path_, new_dict_value);
}
return was_reset;
}