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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 "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 = pref_store_contents->FindPath(pref_path_);
- 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 ? absl::make_optional(value->Clone()) : absl::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_);
- 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 = pref_store_contents->FindPath(pref_path_);
- 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 = pref_store_contents->FindPath(pref_path_);
- external_validation_transaction->StoreHash(pref_path_, new_value);
- }
- return was_reset;
- }
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