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.
4
5 #include "device/bluetooth/bluetooth_gatt_notify_session_chromeos.h"
6
7 #include "base/bind.h"
8 #include "base/logging.h"
9 #include "chromeos/dbus/dbus_thread_manager.h"
10 #include "device/bluetooth/bluetooth_adapter.h"
11 #include "device/bluetooth/bluetooth_device.h"
12 #include "device/bluetooth/bluetooth_gatt_service.h"
13 #include "device/bluetooth/bluetooth_remote_gatt_characteristic_chromeos.h"
14
15 namespace chromeos {
16
BluetoothGattNotifySessionChromeOS(scoped_refptr<device::BluetoothAdapter> adapter,const std::string & device_address,const std::string & service_identifier,const std::string & characteristic_identifier,const dbus::ObjectPath & characteristic_path)17 BluetoothGattNotifySessionChromeOS::BluetoothGattNotifySessionChromeOS(
18 scoped_refptr<device::BluetoothAdapter> adapter,
19 const std::string& device_address,
20 const std::string& service_identifier,
21 const std::string& characteristic_identifier,
22 const dbus::ObjectPath& characteristic_path)
23 : active_(true),
24 adapter_(adapter),
25 device_address_(device_address),
26 service_id_(service_identifier),
27 characteristic_id_(characteristic_identifier),
28 object_path_(characteristic_path) {
29 DCHECK(adapter_.get());
30 DCHECK(!device_address_.empty());
31 DCHECK(!service_id_.empty());
32 DCHECK(!characteristic_id_.empty());
33 DCHECK(object_path_.IsValid());
34
35 DBusThreadManager::Get()->GetBluetoothGattCharacteristicClient()->AddObserver(
36 this);
37 }
38
~BluetoothGattNotifySessionChromeOS()39 BluetoothGattNotifySessionChromeOS::~BluetoothGattNotifySessionChromeOS() {
40 DBusThreadManager::Get()
41 ->GetBluetoothGattCharacteristicClient()
42 ->RemoveObserver(this);
43 Stop(base::Bind(&base::DoNothing));
44 }
45
GetCharacteristicIdentifier() const46 std::string BluetoothGattNotifySessionChromeOS::GetCharacteristicIdentifier()
47 const {
48 return characteristic_id_;
49 }
50
IsActive()51 bool BluetoothGattNotifySessionChromeOS::IsActive() {
52 // Determine if the session is active. If |active_| is false, then it's
53 // been explicitly marked, so return false.
54 if (!active_)
55 return false;
56
57 // The fact that |active_| is true doesn't mean that the session is
58 // actually active, since the characteristic might have stopped sending
59 // notifications yet this method was called before we processed the
60 // observer event (e.g. because somebody else called this method in their
61 // BluetoothGattCharacteristicClient::Observer implementation, which was
62 // called before ours). Check the client to see if notifications are still
63 // being sent.
64 BluetoothGattCharacteristicClient::Properties* properties =
65 DBusThreadManager::Get()
66 ->GetBluetoothGattCharacteristicClient()
67 ->GetProperties(object_path_);
68 if (!properties || !properties->notifying.value())
69 active_ = false;
70
71 return active_;
72 }
73
Stop(const base::Closure & callback)74 void BluetoothGattNotifySessionChromeOS::Stop(const base::Closure& callback) {
75 if (!active_) {
76 VLOG(1) << "Notify session already inactive.";
77 callback.Run();
78 return;
79 }
80
81 // Mark this session as inactive no matter what.
82 active_ = false;
83
84 device::BluetoothDevice* device = adapter_->GetDevice(device_address_);
85 if (!device)
86 return;
87
88 device::BluetoothGattService* service = device->GetGattService(service_id_);
89 if (!service)
90 return;
91
92 BluetoothRemoteGattCharacteristicChromeOS* chrc =
93 static_cast<BluetoothRemoteGattCharacteristicChromeOS*>(
94 service->GetCharacteristic(characteristic_id_));
95 if (!chrc)
96 return;
97
98 chrc->RemoveNotifySession(callback);
99 }
100
GattCharacteristicRemoved(const dbus::ObjectPath & object_path)101 void BluetoothGattNotifySessionChromeOS::GattCharacteristicRemoved(
102 const dbus::ObjectPath& object_path) {
103 if (object_path != object_path_)
104 return;
105
106 active_ = false;
107 }
108
GattCharacteristicPropertyChanged(const dbus::ObjectPath & object_path,const std::string & property_name)109 void BluetoothGattNotifySessionChromeOS::GattCharacteristicPropertyChanged(
110 const dbus::ObjectPath& object_path,
111 const std::string& property_name) {
112 if (object_path != object_path_)
113 return;
114
115 if (!active_)
116 return;
117
118 BluetoothGattCharacteristicClient::Properties* properties =
119 DBusThreadManager::Get()
120 ->GetBluetoothGattCharacteristicClient()
121 ->GetProperties(object_path_);
122 if (!properties) {
123 active_ = false;
124 return;
125 }
126
127 if (property_name == properties->notifying.name() &&
128 !properties->notifying.value())
129 active_ = false;
130 }
131
132 } // namespace chromeos
133