blob: 40b28dd4bbef276d7b1d4196e5e625fb1d94225e [file] [log] [blame]
// Copyright 2014 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.
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "components/proximity_auth/connection_finder.h"
#include "components/proximity_auth/connection_observer.h"
#include "components/proximity_auth/remote_device.h"
#include "device/bluetooth/bluetooth_adapter.h"
#include "device/bluetooth/bluetooth_uuid.h"
namespace proximity_auth {
class BluetoothConnection;
// This ConnectionFinder implementation tries to find a Bluetooth connection to
// the remote device by polling at a fixed interval.
class BluetoothConnectionFinder : public ConnectionFinder,
public ConnectionObserver,
public device::BluetoothAdapter::Observer {
BluetoothConnectionFinder(const RemoteDevice& remote_device,
const device::BluetoothUUID& uuid,
const base::TimeDelta& polling_interval);
~BluetoothConnectionFinder() override;
// ConnectionFinder:
void Find(const ConnectionCallback& connection_callback) override;
// Exposed for mocking out the connection in tests.
virtual scoped_ptr<Connection> CreateConnection();
// BluetoothAdapter::Observer:
void AdapterPresentChanged(device::BluetoothAdapter* adapter,
bool present) override;
void AdapterPoweredChanged(device::BluetoothAdapter* adapter,
bool powered) override;
// Returns true iff the Bluetooth adapter is ready to make connections.
bool IsReadyToPoll();
// Attempts to connect to the |remote_device_| if the system is ready for
// another iteration of polling.
void PollIfReady();
// Wrapper around |PollIfReady()| that can be posted as a delayed task.
void DelayedPollIfReady();
// Unregisters |this| instance as an observer from all objects that it might
// have registered with.
void UnregisterAsObserver();
// Callback to be called when the Bluetooth adapter is initialized.
void OnAdapterInitialized(scoped_refptr<device::BluetoothAdapter> adapter);
// ConnectionObserver:
void OnConnectionStatusChanged(const Connection& connection,
Connection::Status old_status,
Connection::Status new_status) override;
// The remote device to connect to.
const RemoteDevice remote_device_;
// The UUID of the service on the remote device.
const device::BluetoothUUID uuid_;
// The time to wait between polling attempts.
const base::TimeDelta polling_interval_;
// Records the time at which the finder began searching for connections.
base::TimeTicks start_time_;
// The callback that should be called upon a successful connection.
ConnectionCallback connection_callback_;
// The Bluetooth adapter over which the Bluetooth connection will be made.
scoped_refptr<device::BluetoothAdapter> adapter_;
// The Bluetooth connection that will be opened.
scoped_ptr<Connection> connection_;
// Whether there is currently a polling task scheduled.
bool has_delayed_poll_scheduled_;
// Used to schedule everything else.
base::WeakPtrFactory<BluetoothConnectionFinder> weak_ptr_factory_;
// TODO(isherman): Make sure to wire up the controller to listen for screen lock
// state change events, and create or destroy the connection finder as
// appropriate.
} // namespace proximity_auth