blob: c4f820af7009c0f8884f9613ad7eadfe84583cff [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_atomic_preference.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;
TrackedAtomicPreference::TrackedAtomicPreference(
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 TrackedAtomicPreference::GetType() const {
return TrackedPreferenceType::ATOMIC;
}
void TrackedAtomicPreference::OnNewValue(
const base::Value* value,
PrefHashStoreTransaction* transaction) const {
transaction->StoreHash(pref_path_, value);
}
bool TrackedAtomicPreference::EnforceAndReport(
base::DictionaryValue* pref_store_contents,
PrefHashStoreTransaction* transaction,
PrefHashStoreTransaction* external_validation_transaction) const {
const base::Value* value = NULL;
pref_store_contents->Get(pref_path_, &value);
ValueState value_state = transaction->CheckValue(pref_path_, value);
helper_.ReportValidationResult(value_state, transaction->GetStoreUMASuffix());
ValueState external_validation_value_state = ValueState::UNSUPPORTED;
if (external_validation_transaction) {
external_validation_value_state =
external_validation_transaction->CheckValue(pref_path_, value);
helper_.ReportValidationResult(
external_validation_value_state,
external_validation_transaction->GetStoreUMASuffix());
}
if (delegate_) {
delegate_->OnAtomicPreferenceValidation(
pref_path_, value ? base::make_optional(value->Clone()) : base::nullopt,
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) {
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::Value* new_value = NULL;
pref_store_contents->Get(pref_path_, &new_value);
transaction->StoreHash(pref_path_, new_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::Value* new_value = nullptr;
pref_store_contents->Get(pref_path_, &new_value);
external_validation_transaction->StoreHash(pref_path_, new_value);
}
return was_reset;
}