1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef COMPONENTS_PROXIMITY_AUTH_BLUETOOTH_CONNECTION_FINDER_H
6 #define COMPONENTS_PROXIMITY_AUTH_BLUETOOTH_CONNECTION_FINDER_H
8 #include "base/callback.h"
9 #include "base/macros.h"
10 #include "base/memory/ref_counted.h"
11 #include "base/memory/scoped_ptr.h"
12 #include "base/memory/weak_ptr.h"
13 #include "base/time/time.h"
14 #include "components/proximity_auth/connection_finder.h"
15 #include "components/proximity_auth/connection_observer.h"
16 #include "components/proximity_auth/remote_device.h"
17 #include "device/bluetooth/bluetooth_adapter.h"
18 #include "device/bluetooth/bluetooth_uuid.h"
20 namespace proximity_auth
{
22 class BluetoothConnection
;
24 // This ConnectionFinder implementation tries to find a Bluetooth connection to
25 // the remote device by polling at a fixed interval.
26 class BluetoothConnectionFinder
: public ConnectionFinder
,
27 public ConnectionObserver
,
28 public device::BluetoothAdapter::Observer
{
30 BluetoothConnectionFinder(const RemoteDevice
& remote_device
,
31 const device::BluetoothUUID
& uuid
,
32 const base::TimeDelta
& polling_interval
);
33 ~BluetoothConnectionFinder() override
;
36 void Find(const ConnectionCallback
& connection_callback
) override
;
39 // Exposed for mocking out the connection in tests.
40 virtual scoped_ptr
<Connection
> CreateConnection();
42 // BluetoothAdapter::Observer:
43 void AdapterPresentChanged(device::BluetoothAdapter
* adapter
,
44 bool present
) override
;
45 void AdapterPoweredChanged(device::BluetoothAdapter
* adapter
,
46 bool powered
) override
;
49 // Returns true iff the Bluetooth adapter is ready to make connections.
52 // Attempts to connect to the |remote_device_| if the system is ready for
53 // another iteration of polling.
56 // Wrapper around |PollIfReady()| that can be posted as a delayed task.
57 void DelayedPollIfReady();
59 // Unregisters |this| instance as an observer from all objects that it might
60 // have registered with.
61 void UnregisterAsObserver();
63 // Callback to be called when the Bluetooth adapter is initialized.
64 void OnAdapterInitialized(scoped_refptr
<device::BluetoothAdapter
> adapter
);
66 // ConnectionObserver:
67 void OnConnectionStatusChanged(Connection
* connection
,
68 Connection::Status old_status
,
69 Connection::Status new_status
) override
;
71 // The remote device to connect to.
72 const RemoteDevice remote_device_
;
74 // The UUID of the service on the remote device.
75 const device::BluetoothUUID uuid_
;
77 // The time to wait between polling attempts.
78 const base::TimeDelta polling_interval_
;
80 // Records the time at which the finder began searching for connections.
81 base::TimeTicks start_time_
;
83 // The callback that should be called upon a successful connection.
84 ConnectionCallback connection_callback_
;
86 // The Bluetooth adapter over which the Bluetooth connection will be made.
87 scoped_refptr
<device::BluetoothAdapter
> adapter_
;
89 // The Bluetooth connection that will be opened.
90 scoped_ptr
<Connection
> connection_
;
92 // Whether there is currently a polling task scheduled.
93 bool has_delayed_poll_scheduled_
;
95 // Used to schedule everything else.
96 base::WeakPtrFactory
<BluetoothConnectionFinder
> weak_ptr_factory_
;
98 DISALLOW_COPY_AND_ASSIGN(BluetoothConnectionFinder
);
101 // TODO(isherman): Make sure to wire up the controller to listen for screen lock
102 // state change events, and create or destroy the connection finder as
105 } // namespace proximity_auth
107 #endif // COMPONENTS_PROXIMITY_AUTH_BLUETOOTH_CONNECTION_FINDER_H