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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 DEVICE_BLUETOOTH_FLOSS_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_FLOSS_H_
#define DEVICE_BLUETOOTH_FLOSS_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_FLOSS_H_
#include <memory>
#include <tuple>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "device/bluetooth/bluetooth_export.h"
#include "device/bluetooth/bluetooth_remote_gatt_characteristic.h"
#include "device/bluetooth/bluetooth_remote_gatt_descriptor.h"
#include "device/bluetooth/floss/floss_gatt_manager_client.h"
#include "device/bluetooth/public/cpp/bluetooth_uuid.h"
namespace floss {
class BluetoothRemoteGattCharacteristicFloss;
class BluetoothRemoteGattServiceFloss;
struct GattDescriptor;
class DEVICE_BLUETOOTH_EXPORT BluetoothRemoteGattDescriptorFloss
: public device::BluetoothRemoteGattDescriptor,
public FlossGattClientObserver {
public:
// Construct remote descriptor.
static std::unique_ptr<BluetoothRemoteGattDescriptorFloss> Create(
BluetoothRemoteGattServiceFloss* service,
BluetoothRemoteGattCharacteristicFloss* characteristic,
GattDescriptor* descriptor);
BluetoothRemoteGattDescriptorFloss(
const BluetoothRemoteGattDescriptorFloss&) = delete;
BluetoothRemoteGattDescriptorFloss& operator=(
const BluetoothRemoteGattDescriptorFloss&) = delete;
~BluetoothRemoteGattDescriptorFloss() override;
// device::BluetoothRemoteGattDescriptor overrides.
std::string GetIdentifier() const override;
device::BluetoothUUID GetUUID() const override;
const std::vector<uint8_t>& GetValue() const override;
device::BluetoothRemoteGattCharacteristic* GetCharacteristic() const override;
device::BluetoothRemoteGattCharacteristic::Permissions GetPermissions()
const override;
void ReadRemoteDescriptor(ValueCallback callback) override;
void WriteRemoteDescriptor(base::span<const uint8_t> new_value,
base::OnceClosure callback,
ErrorCallback error_callback) override;
// FlossGattClientObserver overrides.
void GattDescriptorRead(std::string address,
GattStatus status,
int32_t handle,
const std::vector<uint8_t>& data) override;
void GattDescriptorWrite(std::string address,
GattStatus status,
int32_t handle) override;
void GattNotify(std::string address,
int32_t handle,
const std::vector<uint8_t>& data) override;
private:
BluetoothRemoteGattDescriptorFloss(
BluetoothRemoteGattServiceFloss* service,
BluetoothRemoteGattCharacteristicFloss* characteristic,
GattDescriptor* descriptor);
// Handle result of calling |ReadRemoteDescriptor|.
void OnReadDescriptor(ValueCallback callback, DBusResult<Void> result);
// Handle result of calling |WriteRemoteCharacateristic|.
void OnWriteDescriptor(base::OnceClosure callback,
ErrorCallback error_callback,
std::vector<uint8_t> data,
DBusResult<Void> result);
// Handle timeout for receiving a |GattDescriptorWrite|.
void OnWriteTimeout();
// Send notifications to observer on adapter.
void NotifyValueChanged();
// Cached data from the last read that was done.
std::vector<uint8_t> cached_data_;
// Characteristic which this descriptor belongs to.
raw_ptr<BluetoothRemoteGattCharacteristicFloss> characteristic_;
// Descriptor represented by this class. The contents are owned by the
// parent service so we keep a pointer to it only here.
raw_ptr<GattDescriptor> descriptor_;
// Number of gatt read requests in progress.
int num_of_reads_in_progress_ = 0;
// Callback for pending |ReadRemoteDescriptor|.
ValueCallback pending_read_callback_;
// Callback for pending |WriteRemoteDescriptor|.
std::tuple<base::OnceClosure, ErrorCallback, std::vector<uint8_t>>
pending_write_callbacks_;
// Service where this descriptor belongs. The |service_| pointer owns this
// descriptor so we can keep a pointer to it safely.
raw_ptr<BluetoothRemoteGattServiceFloss> service_;
base::WeakPtrFactory<BluetoothRemoteGattDescriptorFloss> weak_ptr_factory_{
this};
};
} // namespace floss
#endif // DEVICE_BLUETOOTH_FLOSS_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_FLOSS_H_
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