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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/dbus/image_burner/image_burner_client.h"
#include <stdint.h>
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/memory/raw_ptr.h"
#include "chromeos/ash/components/dbus/image_burner/fake_image_burner_client.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_path.h"
#include "dbus/object_proxy.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace ash {
namespace {
// NOTE: This does not use the typical pattern of a single `g_instance` variable
// due to test utilities shared between unit_tests and browser_tests, which have
// different initialization patterns. It's simplest to allow a test-only
// override.
ImageBurnerClient* g_instance = nullptr;
ImageBurnerClient* g_instance_for_test = nullptr;
// The ImageBurnerClient implementation.
class ImageBurnerClientImpl : public ImageBurnerClient {
public:
ImageBurnerClientImpl() : proxy_(nullptr) {}
ImageBurnerClientImpl(const ImageBurnerClientImpl&) = delete;
ImageBurnerClientImpl& operator=(const ImageBurnerClientImpl&) = delete;
~ImageBurnerClientImpl() override = default;
// ImageBurnerClient override.
void BurnImage(const std::string& from_path,
const std::string& to_path,
ErrorCallback error_callback) override {
dbus::MethodCall method_call(imageburn::kImageBurnServiceInterface,
imageburn::kBurnImage);
dbus::MessageWriter writer(&method_call);
writer.AppendString(from_path);
writer.AppendString(to_path);
proxy_->CallMethod(&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&ImageBurnerClientImpl::OnBurnImage,
weak_ptr_factory_.GetWeakPtr(),
std::move(error_callback)));
}
// ImageBurnerClient override.
void SetEventHandlers(
BurnFinishedHandler burn_finished_handler,
const BurnProgressUpdateHandler& burn_progress_update_handler) override {
burn_finished_handler_ = std::move(burn_finished_handler);
burn_progress_update_handler_ = burn_progress_update_handler;
}
// ImageBurnerClient override.
void ResetEventHandlers() override {
burn_finished_handler_.Reset();
burn_progress_update_handler_.Reset();
}
void Init(dbus::Bus* bus) override {
proxy_ =
bus->GetObjectProxy(imageburn::kImageBurnServiceName,
dbus::ObjectPath(imageburn::kImageBurnServicePath));
proxy_->ConnectToSignal(
imageburn::kImageBurnServiceInterface,
imageburn::kSignalBurnFinishedName,
base::BindRepeating(&ImageBurnerClientImpl::OnBurnFinished,
weak_ptr_factory_.GetWeakPtr()),
base::BindOnce(&ImageBurnerClientImpl::OnSignalConnected,
weak_ptr_factory_.GetWeakPtr()));
proxy_->ConnectToSignal(
imageburn::kImageBurnServiceInterface, imageburn::kSignalBurnUpdateName,
base::BindRepeating(&ImageBurnerClientImpl::OnBurnProgressUpdate,
weak_ptr_factory_.GetWeakPtr()),
base::BindOnce(&ImageBurnerClientImpl::OnSignalConnected,
weak_ptr_factory_.GetWeakPtr()));
}
private:
// Called when a response for BurnImage is received
void OnBurnImage(ErrorCallback error_callback, dbus::Response* response) {
if (!response) {
std::move(error_callback).Run();
return;
}
}
// Handles burn_finished signal and calls |handler|.
void OnBurnFinished(dbus::Signal* signal) {
dbus::MessageReader reader(signal);
std::string target_path;
bool success;
std::string error;
if (!reader.PopString(&target_path) || !reader.PopBool(&success) ||
!reader.PopString(&error)) {
LOG(ERROR) << "Invalid signal: " << signal->ToString();
return;
}
if (burn_finished_handler_)
std::move(burn_finished_handler_).Run(target_path, success, error);
}
// Handles burn_progress_udpate signal and calls |handler|.
void OnBurnProgressUpdate(dbus::Signal* signal) {
dbus::MessageReader reader(signal);
std::string target_path;
int64_t num_bytes_burnt;
int64_t total_size;
if (!reader.PopString(&target_path) || !reader.PopInt64(&num_bytes_burnt) ||
!reader.PopInt64(&total_size)) {
LOG(ERROR) << "Invalid signal: " << signal->ToString();
return;
}
if (!burn_progress_update_handler_.is_null())
burn_progress_update_handler_.Run(target_path, num_bytes_burnt,
total_size);
}
// Handles the result of signal connection setup.
void OnSignalConnected(const std::string& interface,
const std::string& signal,
bool succeeded) {
LOG_IF(ERROR, !succeeded)
<< "Connect to " << interface << " " << signal << " failed.";
}
raw_ptr<dbus::ObjectProxy> proxy_;
BurnFinishedHandler burn_finished_handler_;
BurnProgressUpdateHandler burn_progress_update_handler_;
// 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<ImageBurnerClientImpl> weak_ptr_factory_{this};
};
} // namespace
// static
ImageBurnerClient* ImageBurnerClient::Get() {
if (g_instance_for_test)
return g_instance_for_test;
return g_instance;
}
// static
void ImageBurnerClient::Initialize(dbus::Bus* bus) {
CHECK(bus);
CHECK(!g_instance);
g_instance = new ImageBurnerClientImpl();
g_instance->Init(bus);
}
// static
void ImageBurnerClient::InitializeFake() {
CHECK(!g_instance);
g_instance = new FakeImageBurnerClient();
g_instance->Init(nullptr);
}
// static
void ImageBurnerClient::SetInstanceForTest(ImageBurnerClient* client) {
g_instance_for_test = client;
}
// static
void ImageBurnerClient::Shutdown() {
CHECK(g_instance);
delete g_instance;
g_instance = nullptr;
}
ImageBurnerClient::ImageBurnerClient() = default;
ImageBurnerClient::~ImageBurnerClient() = default;
} // namespace ash
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