Migrate weave-related classes from proximity_auth/ble to cryptauth/ble.

components/proximity_auth/ble/bluetooth_low_energy_characteristics_finder.h

-// Copyright 2015 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.
-
-#ifndef COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_CHARACTERISTICS_FINDER_H_
-#define COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_CHARACTERISTICS_FINDER_H_
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "components/proximity_auth/ble/remote_attribute.h"
-#include "device/bluetooth/bluetooth_adapter.h"
-#include "device/bluetooth/bluetooth_device.h"
-#include "device/bluetooth/bluetooth_remote_gatt_characteristic.h"
-#include "device/bluetooth/bluetooth_remote_gatt_service.h"
-#include "device/bluetooth/bluetooth_uuid.h"
-
-namespace proximity_auth {
-
-// Looks for given characteristics in a remote device, for which a GATT
-// connection was already established. In the current BLE connection protocol
-// (device::BluetoothDevice::CreateGattConnection), remote characteristic
-// discovery starts immediatelly after a GATT connection was established. So,
-// this class simply adds an observer for a characteristic discovery event and
-// call |success_callback_| once all necessary characteristics were discovered.
-class BluetoothLowEnergyCharacteristicsFinder
-    : public device::BluetoothAdapter::Observer {
- public:
-  // This callbacks takes as arguments (in this order): |remote_service_|,
-  // |to_peripheral_char_| and |from_peripheral_char_|. Note that, since this is
-  // called after the characteristics were discovered, their id field (e.g.
-  // to_peripheral_char_.id) will be non-blank.
-  typedef base::Callback<void(const RemoteAttribute&,
-                              const RemoteAttribute&,
-                              const RemoteAttribute&)> SuccessCallback;
-
-  // This callback takes as arguments (in this order): |to_peripheral_char_| and
-  // |from_peripheral_char_|. A blank id field in the characteristics indicate
-  // that the characteristics was not found in the remote service.
-  // TODO(sacomoto): Remove RemoteAttributes and add an error message instead.
-  // The caller of this object should not care if only a subset of the
-  // characteristics was found. See crbug.com/495511.
-  typedef base::Callback<void(const RemoteAttribute&, const RemoteAttribute&)>
-      ErrorCallback;
-
-  // Constructs the object and registers itself as an observer for |adapter|,
-  // waiting for |to_peripheral_char| and |from_peripheral_char| to be found.
-  // When both characteristics were found |success_callback| is called. After
-  // all characteristics of |service| were discovered, if |from_periphral_char|
-  // or |to_peripheral| was not found, it calls |error_callback|. The object
-  // will perform at most one call of the callbacks.
-  BluetoothLowEnergyCharacteristicsFinder(
-      scoped_refptr<device::BluetoothAdapter> adapter,
-      device::BluetoothDevice* device,
-      const RemoteAttribute& remote_service,
-      const RemoteAttribute& to_peripheral_char,
-      const RemoteAttribute& from_peripheral_char,
-      const SuccessCallback& success_callback,
-      const ErrorCallback& error_callback);
-
-  ~BluetoothLowEnergyCharacteristicsFinder() override;
-
- protected:
-  // device::BluetoothAdapter::Observer:
-  void GattDiscoveryCompleteForService(
-      device::BluetoothAdapter* adapter,
-      device::BluetoothRemoteGattService* service) override;
-  void GattCharacteristicAdded(
-      device::BluetoothAdapter* adapter,
-      device::BluetoothRemoteGattCharacteristic* characteristic) override;
-
-  // For testing. Used to mock this class.
-  BluetoothLowEnergyCharacteristicsFinder();
-
- private:
-  // Handles the discovery of a new characteristic.
-  void HandleCharacteristicUpdate(
-      device::BluetoothRemoteGattCharacteristic* characteristic);
-
-  // Scans the remote chracteristics of the service with |uuid| in |device|
-  // calling HandleCharacteristicUpdate() for each of them.
-  void ScanRemoteCharacteristics(device::BluetoothDevice* device,
-                                 const device::BluetoothUUID& uuid);
-
-  // Updates the value of |to_peripheral_char_| and
-  // |from_peripheral_char_|
-  // when |characteristic| was found.
-  void UpdateCharacteristicsStatus(
-      device::BluetoothRemoteGattCharacteristic* characteristic);
-
-  // Resets |success_callback_| and |success_callback_|. This should be called
-  // whenever a callback is called to avoid multiple callbacks calls.
-  void ResetCallbacks();
-
-  // The Bluetooth adapter where the connection was established.
-  scoped_refptr<device::BluetoothAdapter> adapter_;
-
-  // Remote service the |connection_| was established with.
-  RemoteAttribute remote_service_;
-
-  // Characteristic used to receive data from the remote device.
-  RemoteAttribute to_peripheral_char_;
-
-  // Characteristic used to receive data from the remote device.
-  RemoteAttribute from_peripheral_char_;
-
-  // Called when all characteristics were found.
-  SuccessCallback success_callback_;
-
-  // Called when there is an error.
-  ErrorCallback error_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(BluetoothLowEnergyCharacteristicsFinder);
-};
-
-}  // namespace proximity_auth
-
-#endif  // COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_CHARACTERISTICS_FINDER_H_