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nearby/fastpair/pairing/pairer_broker_impl.h
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2023-07-25 16:39:02 -07:00

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// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef THIRD_PARTY_NEARBY_FASTPAIR_PAIRING_PAIRER_BROKER_IMPL_H_
#define THIRD_PARTY_NEARBY_FASTPAIR_PAIRING_PAIRER_BROKER_IMPL_H_
#include <memory>
#include <optional>
#include <string>
#include "absl/container/flat_hash_map.h"
#include "fastpair/common/fast_pair_device.h"
#include "fastpair/internal/mediums/mediums.h"
#include "fastpair/pairing/fastpair/fast_pair_pairer.h"
#include "fastpair/pairing/pairer_broker.h"
#include "internal/account/account_manager.h"
#include "internal/base/observer_list.h"
#include "internal/platform/single_thread_executor.h"
#include "internal/platform/timer_impl.h"
namespace nearby {
namespace fastpair {
class PairerBrokerImpl : public PairerBroker {
public:
explicit PairerBrokerImpl(Mediums& medium, SingleThreadExecutor* executor,
AccountManager* account_manager);
PairerBrokerImpl(const PairerBrokerImpl&) = delete;
PairerBrokerImpl& operator=(const PairerBrokerImpl&) = delete;
// PairingBroker:
void AddObserver(Observer* observer) override;
// The `observer` can still be called after removing if it has already
// been scheduled to run (or is running) on the background thread.
void RemoveObserver(Observer* observer) override;
void PairDevice(FastPairDevice& device) override;
bool IsPairing() override;
void StopPairing() override;
friend class PairerBrokerImplTest;
private:
mutable Mutex mutex_;
void PairFastPairDevice(FastPairDevice& device);
void CreateHandshake(FastPairDevice& device);
void OnHandshakeComplete(FastPairDevice& device,
std::optional<PairFailure> failure)
ABSL_EXCLUSIVE_LOCKS_REQUIRED(*executor_);
void OnHandshakeFailure(FastPairDevice& device, PairFailure failure)
ABSL_EXCLUSIVE_LOCKS_REQUIRED(*executor_);
void StartPairingAttempt(FastPairDevice& device);
void OnFastPairDevicePaired(FastPairDevice& device)
ABSL_EXCLUSIVE_LOCKS_REQUIRED(*executor_);
void OnFastPairPairingFailure(FastPairDevice& device, PairFailure failure)
ABSL_EXCLUSIVE_LOCKS_REQUIRED(*executor_);
void OnFastPairProcedureComplete(FastPairDevice& device)
ABSL_EXCLUSIVE_LOCKS_REQUIRED(*executor_);
void OnAccountKeyFailure(FastPairDevice& device, PairFailure failure)
ABSL_EXCLUSIVE_LOCKS_REQUIRED(*executor_);
void EraseHandshakeAndPairers(FastPairDevice& device)
ABSL_EXCLUSIVE_LOCKS_REQUIRED(*executor_);
Mediums& medium_;
SingleThreadExecutor* executor_;
AccountManager* account_manager_;
// The key for all the following maps is a device model id.
absl::flat_hash_map<std::string, std::unique_ptr<FastPairPairer>>
fast_pair_pairers_ ABSL_GUARDED_BY(mutex_);
absl::flat_hash_map<std::string, int> pair_failure_counts_
ABSL_GUARDED_BY(mutex_);
absl::flat_hash_map<std::string, bool>
did_handshake_previously_complete_successfully_map_
ABSL_GUARDED_BY(mutex_);
absl::flat_hash_map<std::string, int> num_handshake_attempts_
ABSL_GUARDED_BY(mutex_);
absl::flat_hash_map<std::string, std::string>
model_id_to_current_ble_address_map_ ABSL_GUARDED_BY(mutex_);
// Timer
std::unique_ptr<TimerImpl> cancel_pairing_timer_;
std::unique_ptr<TimerImpl> retry_handshake_timer_;
ObserverList<Observer> observers_;
};
} // namespace fastpair
} // namespace nearby
#endif // THIRD_PARTY_NEARBY_FASTPAIR_PAIRING_PAIRER_BROKER_IMPL_H_