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// 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/nfc_adapter_client.h"
#include <map>
#include <utility>
#include "base/bind.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/observer_list.h"
#include "base/strings/stringprintf.h"
#include "chromeos/dbus/nfc_manager_client.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace chromeos {
NfcAdapterClient::Properties::Properties(
dbus::ObjectProxy* object_proxy,
const PropertyChangedCallback& callback)
: NfcPropertySet(object_proxy,
nfc_adapter::kNfcAdapterInterface,
callback) {
RegisterProperty(nfc_adapter::kModeProperty, &mode);
RegisterProperty(nfc_adapter::kPoweredProperty, &powered);
RegisterProperty(nfc_adapter::kPollingProperty, &polling);
RegisterProperty(nfc_adapter::kProtocolsProperty, &protocols);
RegisterProperty(nfc_adapter::kTagsProperty, &tags);
RegisterProperty(nfc_adapter::kDevicesProperty, &devices);
}
NfcAdapterClient::Properties::~Properties() {
}
// The NfcAdapterClient implementation used in production.
class NfcAdapterClientImpl
: public NfcAdapterClient,
public NfcManagerClient::Observer,
public nfc_client_helpers::DBusObjectMap::Delegate {
public:
explicit NfcAdapterClientImpl(NfcManagerClient* manager_client)
: bus_(NULL),
manager_client_(manager_client),
weak_ptr_factory_(this) {
DCHECK(manager_client);
}
~NfcAdapterClientImpl() override { manager_client_->RemoveObserver(this); }
// NfcAdapterClient override.
void AddObserver(NfcAdapterClient::Observer* observer) override {
DCHECK(observer);
observers_.AddObserver(observer);
}
// NfcAdapterClient override.
void RemoveObserver(NfcAdapterClient::Observer* observer) override {
DCHECK(observer);
observers_.RemoveObserver(observer);
}
// NfcAdapterClient override.
std::vector<dbus::ObjectPath> GetAdapters() override {
return object_map_->GetObjectPaths();
}
// NfcAdapterClient override.
Properties* GetProperties(const dbus::ObjectPath& object_path) override {
return static_cast<Properties*>(
object_map_->GetObjectProperties(object_path));
}
// NfcAdapterClient override.
void StartPollLoop(
const dbus::ObjectPath& object_path,
const std::string& mode,
const base::Closure& callback,
const nfc_client_helpers::ErrorCallback& error_callback) override {
dbus::ObjectProxy* object_proxy = object_map_->GetObjectProxy(object_path);
if (!object_proxy) {
std::string error_message =
base::StringPrintf("NFC adapter with object path \"%s\" does not "
"exist.", object_path.value().c_str());
LOG(ERROR) << error_message;
error_callback.Run(nfc_client_helpers::kUnknownObjectError,
error_message);
return;
}
dbus::MethodCall method_call(nfc_adapter::kNfcAdapterInterface,
nfc_adapter::kStartPollLoop);
dbus::MessageWriter writer(&method_call);
writer.AppendString(mode);
object_proxy->CallMethodWithErrorCallback(
&method_call,
dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::Bind(&nfc_client_helpers::OnSuccess, callback),
base::Bind(&nfc_client_helpers::OnError, error_callback));
}
// NfcAdapterClient override.
void StopPollLoop(
const dbus::ObjectPath& object_path,
const base::Closure& callback,
const nfc_client_helpers::ErrorCallback& error_callback) override {
dbus::ObjectProxy* object_proxy = object_map_->GetObjectProxy(object_path);
if (!object_proxy) {
std::string error_message =
base::StringPrintf("NFC adapter with object path \"%s\" does not "
"exist.", object_path.value().c_str());
LOG(ERROR) << error_message;
error_callback.Run(nfc_client_helpers::kUnknownObjectError,
error_message);
return;
}
dbus::MethodCall method_call(nfc_adapter::kNfcAdapterInterface,
nfc_adapter::kStopPollLoop);
object_proxy->CallMethodWithErrorCallback(
&method_call,
dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::Bind(&nfc_client_helpers::OnSuccess, callback),
base::Bind(&nfc_client_helpers::OnError, error_callback));
}
protected:
// DBusClient override.
void Init(dbus::Bus* bus) override {
VLOG(1) << "Creating NfcAdapterClientImpl";
DCHECK(bus);
bus_ = bus;
object_map_.reset(new nfc_client_helpers::DBusObjectMap(
nfc_adapter::kNfcAdapterServiceName, this, bus));
DCHECK(manager_client_);
manager_client_->AddObserver(this);
}
private:
// NfcManagerClient::Observer override.
void ManagerPropertyChanged(const std::string& property_name) override {
// Update the adapter proxies.
DCHECK(manager_client_);
NfcManagerClient::Properties* manager_properties =
manager_client_->GetProperties();
// Ignore changes to properties other than "Adapters".
if (property_name != manager_properties->adapters.name())
return;
// Update the known adapters.
VLOG(1) << "NFC adapters changed.";
const std::vector<dbus::ObjectPath>& received_adapters =
manager_properties->adapters.value();
object_map_->UpdateObjects(received_adapters);
}
// nfc_client_helpers::DBusObjectMap::Delegate override.
NfcPropertySet* CreateProperties(dbus::ObjectProxy* object_proxy) override {
return new Properties(
object_proxy,
base::Bind(&NfcAdapterClientImpl::OnPropertyChanged,
weak_ptr_factory_.GetWeakPtr(),
object_proxy->object_path()));
}
// nfc_client_helpers::DBusObjectMap::Delegate override.
void ObjectAdded(const dbus::ObjectPath& object_path) override {
FOR_EACH_OBSERVER(NfcAdapterClient::Observer, observers_,
AdapterAdded(object_path));
}
// nfc_client_helpers::DBusObjectMap::Delegate override.
void ObjectRemoved(const dbus::ObjectPath& object_path) override {
FOR_EACH_OBSERVER(NfcAdapterClient::Observer, observers_,
AdapterRemoved(object_path));
}
// Called by NfcPropertySet when a property value is changed, either by
// result of a signal or response to a GetAll() or Get() call.
void OnPropertyChanged(const dbus::ObjectPath& object_path,
const std::string& property_name) {
VLOG(1) << "Adapter property changed; Path: " << object_path.value()
<< " Property: " << property_name;
FOR_EACH_OBSERVER(NfcAdapterClient::Observer, observers_,
AdapterPropertyChanged(object_path, property_name));
}
// We maintain a pointer to the bus to be able to request proxies for
// new NFC adapters that appear.
dbus::Bus* bus_;
// List of observers interested in event notifications.
base::ObserverList<NfcAdapterClient::Observer> observers_;
// Mapping from object paths to object proxies and properties structures that
// were already created by us.
scoped_ptr<nfc_client_helpers::DBusObjectMap> object_map_;
// The manager client that we listen to events notifications from.
NfcManagerClient* manager_client_;
// 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<NfcAdapterClientImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(NfcAdapterClientImpl);
};
NfcAdapterClient::NfcAdapterClient() {
}
NfcAdapterClient::~NfcAdapterClient() {
}
NfcAdapterClient* NfcAdapterClient::Create(NfcManagerClient* manager_client) {
return new NfcAdapterClientImpl(manager_client);
}
} // namespace chromeos
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