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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_TRUSTED_VAULT_TRUSTED_VAULT_DEGRADED_RECOVERABILITY_HANDLER_H_
#define COMPONENTS_TRUSTED_VAULT_TRUSTED_VAULT_DEGRADED_RECOVERABILITY_HANDLER_H_
#include <memory>
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "components/signin/public/identity_manager/account_info.h"
#include "components/trusted_vault/trusted_vault_connection.h"
#include "components/trusted_vault/trusted_vault_histograms.h"
namespace trusted_vault_pb {
class LocalTrustedVaultDegradedRecoverabilityState;
enum DegradedRecoverabilityValue : int;
} // namespace trusted_vault_pb
namespace trusted_vault {
// Refreshs the degraded recoverability state by scheduling the requests based
// on the current state, heuristics and last refresh time.
class TrustedVaultDegradedRecoverabilityHandler {
public:
class Delegate {
public:
Delegate() = default;
Delegate(const Delegate&) = delete;
Delegate& operator=(const Delegate&) = delete;
virtual ~Delegate() = default;
virtual void WriteDegradedRecoverabilityState(
const trusted_vault_pb::LocalTrustedVaultDegradedRecoverabilityState&
degraded_recoverability_state) = 0;
virtual void OnDegradedRecoverabilityChanged() = 0;
};
// Exposed for testing.
static constexpr base::TimeDelta kLongDegradedRecoverabilityRefreshPeriod =
base::Days(7);
static constexpr base::TimeDelta kShortDegradedRecoverabilityRefreshPeriod =
base::Hours(1);
// `connection` and `delegate` must not be null and must outlive this object.
TrustedVaultDegradedRecoverabilityHandler(
TrustedVaultConnection* connection,
Delegate* delegate,
const CoreAccountInfo& account_info,
const trusted_vault_pb::LocalTrustedVaultDegradedRecoverabilityState&
degraded_recoverability_state);
TrustedVaultDegradedRecoverabilityHandler(
const TrustedVaultDegradedRecoverabilityHandler&) = delete;
TrustedVaultDegradedRecoverabilityHandler& operator=(
const TrustedVaultDegradedRecoverabilityHandler&) = delete;
~TrustedVaultDegradedRecoverabilityHandler();
void HintDegradedRecoverabilityChanged(
TrustedVaultHintDegradedRecoverabilityChangedReasonForUMA reason);
// The scheduler actually starts with the first call to
// GetIsRecoverabilityDegraded().
void GetIsRecoverabilityDegraded(base::OnceCallback<void(bool)> cb);
private:
void UpdateCurrentRefreshPeriod();
void Start();
void Refresh();
void OnRecoverabilityIsDegradedDownloaded(
TrustedVaultRecoverabilityStatus status);
const raw_ptr<TrustedVaultConnection> connection_;
const raw_ptr<Delegate> delegate_;
CoreAccountInfo account_info_;
// A "timer" takes care of invoking Refresh() in the future, once after a
// `current_refresh_period_` delay has elapsed.
base::OneShotTimer next_refresh_timer_;
base::TimeDelta current_refresh_period_;
trusted_vault_pb::DegradedRecoverabilityValue degraded_recoverability_value_;
// The last time Refresh has executed, it's initially null until the first
// Refresh() execution.
base::TimeTicks last_refresh_time_;
std::unique_ptr<TrustedVaultConnection::Request>
ongoing_get_recoverability_request_;
// If GetIsRecoverabilityDegraded(callback) gets invoked before the first
// recoverability request to the server, the callback gets deferred until the
// request is completed.
base::OnceCallback<void(bool)>
pending_get_is_recoverability_degraded_callback_;
};
} // namespace trusted_vault
#endif // COMPONENTS_TRUSTED_VAULT_TRUSTED_VAULT_DEGRADED_RECOVERABILITY_HANDLER_H_
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