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https://github.com/kidfromjupiter/nearby.git
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105 lines
3.9 KiB
C++
105 lines
3.9 KiB
C++
// Copyright 2023 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_WINDOWS_BLE_GATT_CLIENT_H_
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#define THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_WINDOWS_BLE_GATT_CLIENT_H_
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#include <windows.h>
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#include <cstddef>
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#include <memory>
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#include <optional>
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#include <string>
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#include <vector>
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#include "absl/container/flat_hash_map.h"
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#include "absl/synchronization/mutex.h"
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#include "internal/platform/byte_array.h"
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#include "internal/platform/implementation/ble_v2.h"
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#include "winrt/Windows.Devices.Bluetooth.GenericAttributeProfile.h"
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#include "winrt/Windows.Devices.Bluetooth.h"
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#include "winrt/base.h"
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namespace nearby {
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namespace windows {
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class BleGattClient : public api::ble_v2::GattClient {
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public:
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explicit BleGattClient(
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::winrt::Windows::Devices::Bluetooth::BluetoothLEDevice ble_device);
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~BleGattClient() override;
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bool DiscoverServiceAndCharacteristics(
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const Uuid& service_uuid,
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const std::vector<Uuid>& characteristic_uuids) override;
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absl::optional<api::ble_v2::GattCharacteristic> GetCharacteristic(
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const Uuid& service_uuid, const Uuid& characteristic_uuid) override;
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absl::optional<std::string> ReadCharacteristic(
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const api::ble_v2::GattCharacteristic& characteristic) override;
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bool WriteCharacteristic(
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const api::ble_v2::GattCharacteristic& characteristic,
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absl::string_view value,
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api::ble_v2::GattClient::WriteType write_type) override;
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bool SetCharacteristicSubscription(
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const api::ble_v2::GattCharacteristic& characteristic, bool enable,
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absl::AnyInvocable<void(absl::string_view value)>
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on_characteristic_changed_cb) override;
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void Disconnect() override;
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private:
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// Used to save native data related to the GATT characteristic.
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struct GattCharacteristicData {
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std::optional<::winrt::Windows::Devices::Bluetooth::
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GenericAttributeProfile::GattCharacteristic>
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native_characteristic = std::nullopt;
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::winrt::event_token notification_token;
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absl::AnyInvocable<void(absl::string_view value)>
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on_characteristic_changed_cb;
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};
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std::optional<::winrt::Windows::Devices::Bluetooth::GenericAttributeProfile::
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GattCharacteristic>
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GetNativeCharacteristic(const Uuid& service_uuid,
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const Uuid& characteristic_uuid);
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bool WriteCharacteristicConfigurationDescriptor(
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::winrt::Windows::Devices::Bluetooth::GenericAttributeProfile::
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GattCharacteristic& characteristic,
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::winrt::Windows::Devices::Bluetooth::GenericAttributeProfile::
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GattClientCharacteristicConfigurationDescriptorValue value);
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void OnCharacteristicValueChanged(
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const api::ble_v2::GattCharacteristic& characteristic,
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::winrt::Windows::Devices::Bluetooth::GenericAttributeProfile::
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GattValueChangedEventArgs args);
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absl::Mutex mutex_;
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::winrt::Windows::Devices::Bluetooth::BluetoothLEDevice ble_device_;
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::winrt::Windows::Devices::Bluetooth::GenericAttributeProfile::
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GattDeviceServicesResult gatt_devices_services_result_ = nullptr;
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absl::flat_hash_map<api::ble_v2::GattCharacteristic, GattCharacteristicData>
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native_characteristic_map_ ABSL_GUARDED_BY(mutex_);
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};
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} // namespace windows
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} // namespace nearby
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#endif // THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_WINDOWS_BLE_GATT_CLIENT_H_
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