root/chromeos/dbus/bluetooth_adapter_client.cc

DEFINITIONS

1. AddObserver
2. RemoveObserver
3. GetAdapters
4. CreateProperties
5. GetProperties
6. StartDiscovery
7. StopDiscovery
8. RemoveDevice
9. Init
10. ObjectAdded
11. ObjectRemoved
12. OnPropertyChanged
13. OnSuccess
14. OnError
15. Create

// Copyright 2013 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 "chromeos/dbus/bluetooth_adapter_client.h"

#include "base/bind.h"
#include "base/logging.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_manager.h"
#include "dbus/object_path.h"
#include "dbus/object_proxy.h"
#include "third_party/cros_system_api/dbus/service_constants.h"

namespace chromeos {

const char BluetoothAdapterClient::kNoResponseError[] =
    "org.chromium.Error.NoResponse";
const char BluetoothAdapterClient::kUnknownAdapterError[] =
    "org.chromium.Error.UnknownAdapter";

BluetoothAdapterClient::Properties::Properties(
    dbus::ObjectProxy* object_proxy,
    const std::string& interface_name,
    const PropertyChangedCallback& callback)
    : dbus::PropertySet(object_proxy, interface_name, callback) {
  RegisterProperty(bluetooth_adapter::kAddressProperty, &address);
  RegisterProperty(bluetooth_adapter::kNameProperty, &name);
  RegisterProperty(bluetooth_adapter::kAliasProperty, &alias);
  RegisterProperty(bluetooth_adapter::kClassProperty, &bluetooth_class);
  RegisterProperty(bluetooth_adapter::kPoweredProperty, &powered);
  RegisterProperty(bluetooth_adapter::kDiscoverableProperty, &discoverable);
  RegisterProperty(bluetooth_adapter::kPairableProperty, &pairable);
  RegisterProperty(bluetooth_adapter::kPairableTimeoutProperty,
                   &pairable_timeout);
  RegisterProperty(bluetooth_adapter::kDiscoverableTimeoutProperty,
                   &discoverable_timeout);
  RegisterProperty(bluetooth_adapter::kDiscoveringProperty, &discovering);
  RegisterProperty(bluetooth_adapter::kUUIDsProperty, &uuids);
  RegisterProperty(bluetooth_adapter::kModaliasProperty, &modalias);
}

BluetoothAdapterClient::Properties::~Properties() {
}


// The BluetoothAdapterClient implementation used in production.
class BluetoothAdapterClientImpl
    : public BluetoothAdapterClient,
      public dbus::ObjectManager::Interface {
 public:
  BluetoothAdapterClientImpl() : weak_ptr_factory_(this) {}

  virtual ~BluetoothAdapterClientImpl() {
    object_manager_->UnregisterInterface(
        bluetooth_adapter::kBluetoothAdapterInterface);
  }

  // BluetoothAdapterClient override.
  virtual void AddObserver(BluetoothAdapterClient::Observer* observer)
      OVERRIDE {
    DCHECK(observer);
    observers_.AddObserver(observer);
  }

  // BluetoothAdapterClient override.
  virtual void RemoveObserver(BluetoothAdapterClient::Observer* observer)
      OVERRIDE {
    DCHECK(observer);
    observers_.RemoveObserver(observer);
  }

  // Returns the list of adapter object paths known to the system.
  virtual std::vector<dbus::ObjectPath> GetAdapters() OVERRIDE {
    return object_manager_->GetObjectsWithInterface(
        bluetooth_adapter::kBluetoothAdapterInterface);
  }

  // dbus::ObjectManager::Interface override.
  virtual dbus::PropertySet* CreateProperties(
      dbus::ObjectProxy* object_proxy,
      const dbus::ObjectPath& object_path,
      const std::string& interface_name) OVERRIDE {
    Properties* properties = new Properties(
        object_proxy,
        interface_name,
        base::Bind(&BluetoothAdapterClientImpl::OnPropertyChanged,
                   weak_ptr_factory_.GetWeakPtr(),
                   object_path));
    return static_cast<dbus::PropertySet*>(properties);
  }

  // BluetoothAdapterClient override.
  virtual Properties* GetProperties(const dbus::ObjectPath& object_path)
      OVERRIDE {
    return static_cast<Properties*>(
        object_manager_->GetProperties(
            object_path,
            bluetooth_adapter::kBluetoothAdapterInterface));
  }

  // BluetoothAdapterClient override.
  virtual void StartDiscovery(const dbus::ObjectPath& object_path,
                              const base::Closure& callback,
                              const ErrorCallback& error_callback) OVERRIDE {
    dbus::MethodCall method_call(
        bluetooth_adapter::kBluetoothAdapterInterface,
        bluetooth_adapter::kStartDiscovery);

    dbus::ObjectProxy* object_proxy =
        object_manager_->GetObjectProxy(object_path);
    if (!object_proxy) {
      error_callback.Run(kUnknownAdapterError, "");
      return;
    }

    object_proxy->CallMethodWithErrorCallback(
        &method_call,
        dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
        base::Bind(&BluetoothAdapterClientImpl::OnSuccess,
                   weak_ptr_factory_.GetWeakPtr(), callback),
        base::Bind(&BluetoothAdapterClientImpl::OnError,
                   weak_ptr_factory_.GetWeakPtr(), error_callback));
  }

  // BluetoothAdapterClient override.
  virtual void StopDiscovery(const dbus::ObjectPath& object_path,
                             const base::Closure& callback,
                             const ErrorCallback& error_callback) OVERRIDE {
    dbus::MethodCall method_call(
        bluetooth_adapter::kBluetoothAdapterInterface,
        bluetooth_adapter::kStopDiscovery);

    dbus::ObjectProxy* object_proxy =
        object_manager_->GetObjectProxy(object_path);
    if (!object_proxy) {
      error_callback.Run(kUnknownAdapterError, "");
      return;
    }

    object_proxy->CallMethodWithErrorCallback(
        &method_call,
        dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
        base::Bind(&BluetoothAdapterClientImpl::OnSuccess,
                   weak_ptr_factory_.GetWeakPtr(), callback),
        base::Bind(&BluetoothAdapterClientImpl::OnError,
                   weak_ptr_factory_.GetWeakPtr(), error_callback));
  }

  // BluetoothAdapterClient override.
  virtual void RemoveDevice(const dbus::ObjectPath& object_path,
                            const dbus::ObjectPath& device_path,
                            const base::Closure& callback,
                            const ErrorCallback& error_callback) OVERRIDE {
    dbus::MethodCall method_call(
        bluetooth_adapter::kBluetoothAdapterInterface,
        bluetooth_adapter::kRemoveDevice);

    dbus::MessageWriter writer(&method_call);
    writer.AppendObjectPath(device_path);

    dbus::ObjectProxy* object_proxy =
        object_manager_->GetObjectProxy(object_path);
    if (!object_proxy) {
      error_callback.Run(kUnknownAdapterError, "");
      return;
    }

    object_proxy->CallMethodWithErrorCallback(
        &method_call,
        dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
        base::Bind(&BluetoothAdapterClientImpl::OnSuccess,
                   weak_ptr_factory_.GetWeakPtr(), callback),
        base::Bind(&BluetoothAdapterClientImpl::OnError,
                   weak_ptr_factory_.GetWeakPtr(), error_callback));
  }

 protected:
  virtual void Init(dbus::Bus* bus) OVERRIDE {
    object_manager_ = bus->GetObjectManager(
        bluetooth_object_manager::kBluetoothObjectManagerServiceName,
        dbus::ObjectPath(
            bluetooth_object_manager::kBluetoothObjectManagerServicePath));
    object_manager_->RegisterInterface(
        bluetooth_adapter::kBluetoothAdapterInterface, this);
  }

 private:
  // Called by dbus::ObjectManager when an object with the adapter interface
  // is created. Informs observers.
  virtual void ObjectAdded(const dbus::ObjectPath& object_path,
                           const std::string& interface_name) OVERRIDE {
    FOR_EACH_OBSERVER(BluetoothAdapterClient::Observer, observers_,
                      AdapterAdded(object_path));
  }

  // Called by dbus::ObjectManager when an object with the adapter interface
  // is removed. Informs observers.
  virtual void ObjectRemoved(const dbus::ObjectPath& object_path,
                             const std::string& interface_name) OVERRIDE {
    FOR_EACH_OBSERVER(BluetoothAdapterClient::Observer, observers_,
                      AdapterRemoved(object_path));
  }

  // Called by dbus::PropertySet when a property value is changed,
  // either by result of a signal or response to a GetAll() or Get()
  // call. Informs observers.
  void OnPropertyChanged(const dbus::ObjectPath& object_path,
                         const std::string& property_name) {
    FOR_EACH_OBSERVER(BluetoothAdapterClient::Observer, observers_,
                      AdapterPropertyChanged(object_path, property_name));
  }

  // Called when a response for successful method call is received.
  void OnSuccess(const base::Closure& callback,
                 dbus::Response* response) {
    DCHECK(response);
    callback.Run();
  }

  // Called when a response for a failed method call is received.
  void OnError(const ErrorCallback& error_callback,
               dbus::ErrorResponse* response) {
    // Error response has optional error message argument.
    std::string error_name;
    std::string error_message;
    if (response) {
      dbus::MessageReader reader(response);
      error_name = response->GetErrorName();
      reader.PopString(&error_message);
    } else {
      error_name = kNoResponseError;
      error_message = "";
    }
    error_callback.Run(error_name, error_message);
  }

  dbus::ObjectManager* object_manager_;

  // List of observers interested in event notifications from us.
  ObserverList<BluetoothAdapterClient::Observer> observers_;

  // Weak pointer factory for generating 'this' pointers that might live longer
  // than we do.
  // Note: This should remain the last member so it'll be destroyed and
  // invalidate its weak pointers before any other members are destroyed.
  base::WeakPtrFactory<BluetoothAdapterClientImpl>
      weak_ptr_factory_;

  DISALLOW_COPY_AND_ASSIGN(BluetoothAdapterClientImpl);
};

BluetoothAdapterClient::BluetoothAdapterClient() {
}

BluetoothAdapterClient::~BluetoothAdapterClient() {
}

BluetoothAdapterClient* BluetoothAdapterClient::Create() {
  return new BluetoothAdapterClientImpl;
}

}  // namespace chromeos