chromeos/dbus/fake_nfc_adapter_client.cc

// 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/fake_nfc_adapter_client.h"

#include "base/logging.h"
#include "dbus/message.h"
#include "dbus/object_path.h"
#include "third_party/cros_system_api/dbus/service_constants.h"

namespace chromeos {

const char FakeNfcAdapterClient::kAdapterPath0[] = "/fake/nfc0";
const char FakeNfcAdapterClient::kAdapterPath1[] = "/fake/nfc1";

FakeNfcAdapterClient::Properties::Properties(
    const PropertyChangedCallback& callback)
    : NfcAdapterClient::Properties(NULL, callback) {
}

FakeNfcAdapterClient::Properties::~Properties() {
}

void FakeNfcAdapterClient::Properties::Get(
    dbus::PropertyBase* property,
    dbus::PropertySet::GetCallback callback) {
  VLOG(1) << "Get " << property->name();
  callback.Run(false);
}

void FakeNfcAdapterClient::Properties::GetAll() {
  VLOG(1) << "GetAll";
}

void FakeNfcAdapterClient::Properties::Set(
    dbus::PropertyBase* property,
    dbus::PropertySet::SetCallback callback) {
  VLOG(1) << "Set " << property->name();
  if (property->name() != powered.name()) {
    callback.Run(false);
    return;
  }

  // Cannot set the power if currently polling.
  if (polling.value()) {
    callback.Run(false);
    return;
  }

  // Obtain the cached "set value" and send a property changed signal only if
  // its value is different from the current value of the property.
  scoped_ptr<dbus::Response> response(dbus::Response::CreateEmpty());
  dbus::MessageWriter writer(response.get());
  property->AppendSetValueToWriter(&writer);
  dbus::MessageReader reader(response.get());
  bool set_value = false;
  if (!reader.PopVariantOfBool(&set_value) || set_value == powered.value()) {
    LOG(WARNING) << "Property has not changed.";
    callback.Run(false);
    return;
  }
  property->ReplaceValueWithSetValue();
  callback.Run(true);
}

FakeNfcAdapterClient::FakeNfcAdapterClient()
    : present_(true),
      second_present_(false) {
  VLOG(1) << "Creating FakeNfcAdapterClient";

  std::vector<std::string> protocols;
  protocols.push_back(nfc_common::kProtocolFelica);
  protocols.push_back(nfc_common::kProtocolMifare);
  protocols.push_back(nfc_common::kProtocolJewel);
  protocols.push_back(nfc_common::kProtocolIsoDep);
  protocols.push_back(nfc_common::kProtocolNfcDep);

  properties_.reset(new Properties(base::Bind(
      &FakeNfcAdapterClient::OnPropertyChanged,
      base::Unretained(this),
      dbus::ObjectPath(kAdapterPath0))));
  properties_->protocols.ReplaceValue(protocols);

  second_properties_.reset(new Properties(base::Bind(
      &FakeNfcAdapterClient::OnPropertyChanged,
      base::Unretained(this),
      dbus::ObjectPath(kAdapterPath1))));
  second_properties_->protocols.ReplaceValue(protocols);
}

FakeNfcAdapterClient::~FakeNfcAdapterClient() {
}

void FakeNfcAdapterClient::Init(dbus::Bus* bus) {
}

void FakeNfcAdapterClient::AddObserver(Observer* observer) {
  observers_.AddObserver(observer);
}

void FakeNfcAdapterClient::RemoveObserver(Observer* observer) {
  observers_.RemoveObserver(observer);
}

std::vector<dbus::ObjectPath> FakeNfcAdapterClient::GetAdapters() {
  std::vector<dbus::ObjectPath> object_paths;
  if (present_)
    object_paths.push_back(dbus::ObjectPath(kAdapterPath0));
  if (second_present_)
    object_paths.push_back(dbus::ObjectPath(kAdapterPath1));
  return object_paths;
}

FakeNfcAdapterClient::Properties*
FakeNfcAdapterClient::GetProperties(const dbus::ObjectPath& object_path) {
  if (object_path == dbus::ObjectPath(kAdapterPath0))
    return properties_.get();
  if (object_path == dbus::ObjectPath(kAdapterPath1))
    return second_properties_.get();
  return NULL;
}

void FakeNfcAdapterClient::StartPollLoop(
    const dbus::ObjectPath& object_path,
    const std::string& mode,
    const base::Closure& callback,
    const nfc_client_helpers::ErrorCallback& error_callback) {
  VLOG(1) << "FakeNfcAdapterClient::StartPollLoop";
  if (object_path != dbus::ObjectPath(kAdapterPath0)) {
    error_callback.Run(nfc_client_helpers::kNoResponseError, "");
    return;
  }
  if (!properties_->powered.value()) {
    error_callback.Run("org.neard.Error.Failed", "Adapter not powered.");
    return;
  }
  if (properties_->polling.value()) {
    error_callback.Run("org.neard.Error.Failed", "Already polling.");
    return;
  }
  properties_->polling.ReplaceValue(true);
  properties_->mode.ReplaceValue(mode);
  // TODO(armansito): Initiate fake device/tag simulation here.
}

void FakeNfcAdapterClient::StopPollLoop(
    const dbus::ObjectPath& object_path,
    const base::Closure& callback,
    const nfc_client_helpers::ErrorCallback& error_callback) {
  VLOG(1) << "FakeNfcAdapterClient::StopPollLoop.";
  if (object_path != dbus::ObjectPath(kAdapterPath0)) {
    error_callback.Run(nfc_client_helpers::kNoResponseError, "");
    return;
  }
  if (!properties_->polling.value()) {
    error_callback.Run("org.neard.Error.Failed", "Not polling.");
    return;
  }
  // TODO(armansito): End fake device/tag simulation here.
  properties_->polling.ReplaceValue(false);
}

void FakeNfcAdapterClient::SetAdapterPresent(bool present) {
  if (present == present_)
    return;
  present_ = present;
  if (present_) {
    FOR_EACH_OBSERVER(NfcAdapterClient::Observer, observers_,
                      AdapterAdded(dbus::ObjectPath(kAdapterPath0)));
  } else {
    FOR_EACH_OBSERVER(NfcAdapterClient::Observer, observers_,
                      AdapterRemoved(dbus::ObjectPath(kAdapterPath0)));
  }
}

void FakeNfcAdapterClient::SetSecondAdapterPresent(bool present) {
  if (present == second_present_)
    return;
  second_present_ = present;
  if (present_) {
    FOR_EACH_OBSERVER(NfcAdapterClient::Observer, observers_,
                      AdapterAdded(dbus::ObjectPath(kAdapterPath1)));
  } else {
    FOR_EACH_OBSERVER(NfcAdapterClient::Observer, observers_,
                      AdapterRemoved(dbus::ObjectPath(kAdapterPath1)));
  }
}

void FakeNfcAdapterClient::OnPropertyChanged(
    const dbus::ObjectPath& object_path,
    const std::string& property_name) {
  FOR_EACH_OBSERVER(NfcAdapterClient::Observer, observers_,
                    AdapterPropertyChanged(object_path, property_name));
}

}  // namespace chromeos