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// Copyright 2021 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/os_install/os_install_client.h"
#include <optional>
#include "base/logging.h"
#include "base/memory/raw_ptr.h"
#include "base/observer_list.h"
#include "chromeos/ash/components/dbus/os_install/fake_os_install_client.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_proxy.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace ash {
namespace {
OsInstallClient* g_instance = nullptr;
std::optional<OsInstallClient::Status> ParseStatus(const std::string& str) {
if (str == os_install_service::kStatusInProgress)
return OsInstallClient::Status::InProgress;
if (str == os_install_service::kStatusSucceeded)
return OsInstallClient::Status::Succeeded;
if (str == os_install_service::kStatusFailed)
return OsInstallClient::Status::Failed;
if (str == os_install_service::kStatusNoDestinationDeviceFound)
return OsInstallClient::Status::NoDestinationDeviceFound;
LOG(ERROR) << "Invalid status: " << str;
return std::nullopt;
}
class OsInstallClientImpl : public OsInstallClient {
public:
OsInstallClientImpl() = default;
~OsInstallClientImpl() override = default;
OsInstallClientImpl(const OsInstallClientImpl&) = delete;
OsInstallClientImpl& operator=(const OsInstallClientImpl&) = delete;
void Init(dbus::Bus* bus);
void AddObserver(Observer* observer) override;
void RemoveObserver(Observer* observer) override;
bool HasObserver(const Observer* observer) const override;
TestInterface* GetTestInterface() override;
void StartOsInstall() override;
private:
void NotifyStatusChanged(std::optional<Status> status,
const std::string& service_log);
void HandleStartResponse(dbus::Response* response);
void StatusUpdateReceived(dbus::Signal* signal);
void StatusUpdateConnected(const std::string& interface_name,
const std::string& signal_name,
bool success);
raw_ptr<dbus::ObjectProxy> proxy_ = nullptr;
base::ObserverList<Observer> observers_;
base::WeakPtrFactory<OsInstallClientImpl> weak_factory_{this};
};
void OsInstallClientImpl::Init(dbus::Bus* bus) {
proxy_ = bus->GetObjectProxy(
os_install_service::kOsInstallServiceServiceName,
dbus::ObjectPath(os_install_service::kOsInstallServiceServicePath));
proxy_->ConnectToSignal(
os_install_service::kOsInstallServiceInterface,
os_install_service::kSignalOsInstallStatusChanged,
base::BindRepeating(&OsInstallClientImpl::StatusUpdateReceived,
weak_factory_.GetWeakPtr()),
base::BindOnce(&OsInstallClientImpl::StatusUpdateConnected,
weak_factory_.GetWeakPtr()));
}
void OsInstallClientImpl::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void OsInstallClientImpl::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
bool OsInstallClientImpl::HasObserver(const Observer* observer) const {
return observers_.HasObserver(observer);
}
OsInstallClient::TestInterface* OsInstallClientImpl::GetTestInterface() {
return nullptr;
}
void OsInstallClientImpl::StartOsInstall() {
dbus::MethodCall method_call(os_install_service::kOsInstallServiceInterface,
os_install_service::kMethodStartOsInstall);
proxy_->CallMethod(&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&OsInstallClientImpl::HandleStartResponse,
weak_factory_.GetWeakPtr()));
}
void OsInstallClientImpl::NotifyStatusChanged(std::optional<Status> status,
const std::string& service_log) {
if (!status) {
status = Status::Failed;
}
for (auto& observer : observers_) {
observer.StatusChanged(*status, service_log);
}
}
void OsInstallClientImpl::HandleStartResponse(dbus::Response* response) {
if (!response) {
LOG(ERROR) << "Invalid response";
NotifyStatusChanged(Status::Failed, /*service_log=*/"");
return;
}
dbus::MessageReader reader(response);
std::string status_str;
if (!reader.PopString(&status_str)) {
LOG(ERROR) << "Missing status";
NotifyStatusChanged(Status::Failed, /*service_log=*/"");
return;
}
NotifyStatusChanged(ParseStatus(status_str), /*service_log=*/"");
}
void OsInstallClientImpl::StatusUpdateReceived(dbus::Signal* signal) {
dbus::MessageReader reader(signal);
// Read and parse the status.
std::string status_str;
if (!reader.PopString(&status_str)) {
LOG(ERROR) << "Missing status";
return;
}
const auto status = ParseStatus(status_str);
if (!status) {
return;
}
// Read the service log.
std::string service_log;
if (!reader.PopString(&service_log)) {
LOG(ERROR) << "Missing service_log";
return;
}
NotifyStatusChanged(*status, service_log);
}
void OsInstallClientImpl::StatusUpdateConnected(
const std::string& interface_name,
const std::string& signal_name,
bool success) {
LOG_IF(WARNING, !success) << "Failed to connect to status updated signal.";
}
} // namespace
OsInstallClient::OsInstallClient() {
CHECK(!g_instance);
g_instance = this;
}
OsInstallClient::~OsInstallClient() {
CHECK_EQ(this, g_instance);
g_instance = nullptr;
}
// static
void OsInstallClient::Initialize(dbus::Bus* bus) {
CHECK(bus);
(new OsInstallClientImpl())->Init(bus);
}
// static
void OsInstallClient::InitializeFake() {
new FakeOsInstallClient();
}
// static
void OsInstallClient::Shutdown() {
CHECK(g_instance);
delete g_instance;
// The destructor resets |g_instance|.
DCHECK(!g_instance);
}
// static
OsInstallClient* OsInstallClient::Get() {
return g_instance;
}
} // namespace ash
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