1// Copyright 2013 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 "chromeos/dbus/bluetooth_adapter_client.h"
6
7#include "base/bind.h"
8#include "base/logging.h"
9#include "dbus/bus.h"
10#include "dbus/message.h"
11#include "dbus/object_manager.h"
12#include "dbus/object_path.h"
13#include "dbus/object_proxy.h"
14#include "third_party/cros_system_api/dbus/service_constants.h"
15
16namespace chromeos {
17
18const char BluetoothAdapterClient::kNoResponseError[] =
19    "org.chromium.Error.NoResponse";
20const char BluetoothAdapterClient::kUnknownAdapterError[] =
21    "org.chromium.Error.UnknownAdapter";
22
23BluetoothAdapterClient::Properties::Properties(
24    dbus::ObjectProxy* object_proxy,
25    const std::string& interface_name,
26    const PropertyChangedCallback& callback)
27    : dbus::PropertySet(object_proxy, interface_name, callback) {
28  RegisterProperty(bluetooth_adapter::kAddressProperty, &address);
29  RegisterProperty(bluetooth_adapter::kNameProperty, &name);
30  RegisterProperty(bluetooth_adapter::kAliasProperty, &alias);
31  RegisterProperty(bluetooth_adapter::kClassProperty, &bluetooth_class);
32  RegisterProperty(bluetooth_adapter::kPoweredProperty, &powered);
33  RegisterProperty(bluetooth_adapter::kDiscoverableProperty, &discoverable);
34  RegisterProperty(bluetooth_adapter::kPairableProperty, &pairable);
35  RegisterProperty(bluetooth_adapter::kPairableTimeoutProperty,
36                   &pairable_timeout);
37  RegisterProperty(bluetooth_adapter::kDiscoverableTimeoutProperty,
38                   &discoverable_timeout);
39  RegisterProperty(bluetooth_adapter::kDiscoveringProperty, &discovering);
40  RegisterProperty(bluetooth_adapter::kUUIDsProperty, &uuids);
41  RegisterProperty(bluetooth_adapter::kModaliasProperty, &modalias);
42}
43
44BluetoothAdapterClient::Properties::~Properties() {
45}
46
47
48// The BluetoothAdapterClient implementation used in production.
49class BluetoothAdapterClientImpl
50    : public BluetoothAdapterClient,
51      public dbus::ObjectManager::Interface {
52 public:
53  BluetoothAdapterClientImpl() : weak_ptr_factory_(this) {}
54
55  virtual ~BluetoothAdapterClientImpl() {
56    object_manager_->UnregisterInterface(
57        bluetooth_adapter::kBluetoothAdapterInterface);
58  }
59
60  // BluetoothAdapterClient override.
61  virtual void AddObserver(BluetoothAdapterClient::Observer* observer)
62      OVERRIDE {
63    DCHECK(observer);
64    observers_.AddObserver(observer);
65  }
66
67  // BluetoothAdapterClient override.
68  virtual void RemoveObserver(BluetoothAdapterClient::Observer* observer)
69      OVERRIDE {
70    DCHECK(observer);
71    observers_.RemoveObserver(observer);
72  }
73
74  // Returns the list of adapter object paths known to the system.
75  virtual std::vector<dbus::ObjectPath> GetAdapters() OVERRIDE {
76    return object_manager_->GetObjectsWithInterface(
77        bluetooth_adapter::kBluetoothAdapterInterface);
78  }
79
80  // dbus::ObjectManager::Interface override.
81  virtual dbus::PropertySet* CreateProperties(
82      dbus::ObjectProxy* object_proxy,
83      const dbus::ObjectPath& object_path,
84      const std::string& interface_name) OVERRIDE {
85    Properties* properties = new Properties(
86        object_proxy,
87        interface_name,
88        base::Bind(&BluetoothAdapterClientImpl::OnPropertyChanged,
89                   weak_ptr_factory_.GetWeakPtr(),
90                   object_path));
91    return static_cast<dbus::PropertySet*>(properties);
92  }
93
94  // BluetoothAdapterClient override.
95  virtual Properties* GetProperties(const dbus::ObjectPath& object_path)
96      OVERRIDE {
97    return static_cast<Properties*>(
98        object_manager_->GetProperties(
99            object_path,
100            bluetooth_adapter::kBluetoothAdapterInterface));
101  }
102
103  // BluetoothAdapterClient override.
104  virtual void StartDiscovery(const dbus::ObjectPath& object_path,
105                              const base::Closure& callback,
106                              const ErrorCallback& error_callback) OVERRIDE {
107    dbus::MethodCall method_call(
108        bluetooth_adapter::kBluetoothAdapterInterface,
109        bluetooth_adapter::kStartDiscovery);
110
111    dbus::ObjectProxy* object_proxy =
112        object_manager_->GetObjectProxy(object_path);
113    if (!object_proxy) {
114      error_callback.Run(kUnknownAdapterError, "");
115      return;
116    }
117
118    object_proxy->CallMethodWithErrorCallback(
119        &method_call,
120        dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
121        base::Bind(&BluetoothAdapterClientImpl::OnSuccess,
122                   weak_ptr_factory_.GetWeakPtr(), callback),
123        base::Bind(&BluetoothAdapterClientImpl::OnError,
124                   weak_ptr_factory_.GetWeakPtr(), error_callback));
125  }
126
127  // BluetoothAdapterClient override.
128  virtual void StopDiscovery(const dbus::ObjectPath& object_path,
129                             const base::Closure& callback,
130                             const ErrorCallback& error_callback) OVERRIDE {
131    dbus::MethodCall method_call(
132        bluetooth_adapter::kBluetoothAdapterInterface,
133        bluetooth_adapter::kStopDiscovery);
134
135    dbus::ObjectProxy* object_proxy =
136        object_manager_->GetObjectProxy(object_path);
137    if (!object_proxy) {
138      error_callback.Run(kUnknownAdapterError, "");
139      return;
140    }
141
142    object_proxy->CallMethodWithErrorCallback(
143        &method_call,
144        dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
145        base::Bind(&BluetoothAdapterClientImpl::OnSuccess,
146                   weak_ptr_factory_.GetWeakPtr(), callback),
147        base::Bind(&BluetoothAdapterClientImpl::OnError,
148                   weak_ptr_factory_.GetWeakPtr(), error_callback));
149  }
150
151  // BluetoothAdapterClient override.
152  virtual void RemoveDevice(const dbus::ObjectPath& object_path,
153                            const dbus::ObjectPath& device_path,
154                            const base::Closure& callback,
155                            const ErrorCallback& error_callback) OVERRIDE {
156    dbus::MethodCall method_call(
157        bluetooth_adapter::kBluetoothAdapterInterface,
158        bluetooth_adapter::kRemoveDevice);
159
160    dbus::MessageWriter writer(&method_call);
161    writer.AppendObjectPath(device_path);
162
163    dbus::ObjectProxy* object_proxy =
164        object_manager_->GetObjectProxy(object_path);
165    if (!object_proxy) {
166      error_callback.Run(kUnknownAdapterError, "");
167      return;
168    }
169
170    object_proxy->CallMethodWithErrorCallback(
171        &method_call,
172        dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
173        base::Bind(&BluetoothAdapterClientImpl::OnSuccess,
174                   weak_ptr_factory_.GetWeakPtr(), callback),
175        base::Bind(&BluetoothAdapterClientImpl::OnError,
176                   weak_ptr_factory_.GetWeakPtr(), error_callback));
177  }
178
179 protected:
180  virtual void Init(dbus::Bus* bus) OVERRIDE {
181    object_manager_ = bus->GetObjectManager(
182        bluetooth_object_manager::kBluetoothObjectManagerServiceName,
183        dbus::ObjectPath(
184            bluetooth_object_manager::kBluetoothObjectManagerServicePath));
185    object_manager_->RegisterInterface(
186        bluetooth_adapter::kBluetoothAdapterInterface, this);
187  }
188
189 private:
190  // Called by dbus::ObjectManager when an object with the adapter interface
191  // is created. Informs observers.
192  virtual void ObjectAdded(const dbus::ObjectPath& object_path,
193                           const std::string& interface_name) OVERRIDE {
194    FOR_EACH_OBSERVER(BluetoothAdapterClient::Observer, observers_,
195                      AdapterAdded(object_path));
196  }
197
198  // Called by dbus::ObjectManager when an object with the adapter interface
199  // is removed. Informs observers.
200  virtual void ObjectRemoved(const dbus::ObjectPath& object_path,
201                             const std::string& interface_name) OVERRIDE {
202    FOR_EACH_OBSERVER(BluetoothAdapterClient::Observer, observers_,
203                      AdapterRemoved(object_path));
204  }
205
206  // Called by dbus::PropertySet when a property value is changed,
207  // either by result of a signal or response to a GetAll() or Get()
208  // call. Informs observers.
209  void OnPropertyChanged(const dbus::ObjectPath& object_path,
210                         const std::string& property_name) {
211    FOR_EACH_OBSERVER(BluetoothAdapterClient::Observer, observers_,
212                      AdapterPropertyChanged(object_path, property_name));
213  }
214
215  // Called when a response for successful method call is received.
216  void OnSuccess(const base::Closure& callback,
217                 dbus::Response* response) {
218    DCHECK(response);
219    callback.Run();
220  }
221
222  // Called when a response for a failed method call is received.
223  void OnError(const ErrorCallback& error_callback,
224               dbus::ErrorResponse* response) {
225    // Error response has optional error message argument.
226    std::string error_name;
227    std::string error_message;
228    if (response) {
229      dbus::MessageReader reader(response);
230      error_name = response->GetErrorName();
231      reader.PopString(&error_message);
232    } else {
233      error_name = kNoResponseError;
234      error_message = "";
235    }
236    error_callback.Run(error_name, error_message);
237  }
238
239  dbus::ObjectManager* object_manager_;
240
241  // List of observers interested in event notifications from us.
242  ObserverList<BluetoothAdapterClient::Observer> observers_;
243
244  // Weak pointer factory for generating 'this' pointers that might live longer
245  // than we do.
246  // Note: This should remain the last member so it'll be destroyed and
247  // invalidate its weak pointers before any other members are destroyed.
248  base::WeakPtrFactory<BluetoothAdapterClientImpl>
249      weak_ptr_factory_;
250
251  DISALLOW_COPY_AND_ASSIGN(BluetoothAdapterClientImpl);
252};
253
254BluetoothAdapterClient::BluetoothAdapterClient() {
255}
256
257BluetoothAdapterClient::~BluetoothAdapterClient() {
258}
259
260BluetoothAdapterClient* BluetoothAdapterClient::Create() {
261  return new BluetoothAdapterClientImpl;
262}
263
264}  // namespace chromeos
265