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// Copyright 2018 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/seneschal/seneschal_client.h"
#include <memory>
#include "base/check_op.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/task/single_thread_task_runner.h"
#include "chromeos/ash/components/dbus/seneschal/fake_seneschal_client.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "third_party/cros_system_api/dbus/seneschal/dbus-constants.h"
namespace ash {
namespace {
SeneschalClient* g_instance = nullptr;
} // namespace
class SeneschalClientImpl : public SeneschalClient {
public:
SeneschalClientImpl() = default;
SeneschalClientImpl(const SeneschalClientImpl&) = delete;
SeneschalClientImpl& operator=(const SeneschalClientImpl&) = delete;
~SeneschalClientImpl() override = default;
void AddObserver(Observer* observer) override {
observer_list_.AddObserver(observer);
}
void RemoveObserver(Observer* observer) override {
observer_list_.RemoveObserver(observer);
}
void WaitForServiceToBeAvailable(
dbus::ObjectProxy::WaitForServiceToBeAvailableCallback callback)
override {
seneschal_proxy_->WaitForServiceToBeAvailable(std::move(callback));
}
void SharePath(
const vm_tools::seneschal::SharePathRequest& request,
chromeos::DBusMethodCallback<vm_tools::seneschal::SharePathResponse>
callback) override {
dbus::MethodCall method_call(vm_tools::seneschal::kSeneschalInterface,
vm_tools::seneschal::kSharePathMethod);
dbus::MessageWriter writer(&method_call);
if (!writer.AppendProtoAsArrayOfBytes(request)) {
LOG(ERROR) << "Failed to encode SharePath protobuf";
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback), std::nullopt));
return;
}
seneschal_proxy_->CallMethod(
&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&SeneschalClientImpl::OnDBusProtoResponse<
vm_tools::seneschal::SharePathResponse>,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)));
}
void UnsharePath(
const vm_tools::seneschal::UnsharePathRequest& request,
chromeos::DBusMethodCallback<vm_tools::seneschal::UnsharePathResponse>
callback) override {
dbus::MethodCall method_call(vm_tools::seneschal::kSeneschalInterface,
vm_tools::seneschal::kUnsharePathMethod);
dbus::MessageWriter writer(&method_call);
if (!writer.AppendProtoAsArrayOfBytes(request)) {
LOG(ERROR) << "Failed to encode UnsharePath protobuf";
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback), std::nullopt));
return;
}
seneschal_proxy_->CallMethod(
&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&SeneschalClientImpl::OnDBusProtoResponse<
vm_tools::seneschal::UnsharePathResponse>,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)));
}
void Init(dbus::Bus* bus) override {
seneschal_proxy_ = bus->GetObjectProxy(
vm_tools::seneschal::kSeneschalServiceName,
dbus::ObjectPath(vm_tools::seneschal::kSeneschalServicePath));
seneschal_proxy_->SetNameOwnerChangedCallback(
base::BindRepeating(&SeneschalClientImpl::NameOwnerChangedReceived,
weak_ptr_factory_.GetWeakPtr()));
}
private:
template <typename ResponseProto>
void OnDBusProtoResponse(chromeos::DBusMethodCallback<ResponseProto> callback,
dbus::Response* dbus_response) {
if (!dbus_response) {
std::move(callback).Run(std::nullopt);
return;
}
ResponseProto reponse_proto;
dbus::MessageReader reader(dbus_response);
if (!reader.PopArrayOfBytesAsProto(&reponse_proto)) {
LOG(ERROR) << "Failed to parse proto from " << dbus_response->GetMember();
std::move(callback).Run(std::nullopt);
return;
}
std::move(callback).Run(std::move(reponse_proto));
}
void NameOwnerChangedReceived(const std::string& old_owner,
const std::string& new_owner) {
if (!old_owner.empty()) {
for (auto& observer : observer_list_) {
observer.SeneschalServiceStopped();
}
}
if (!new_owner.empty()) {
for (auto& observer : observer_list_) {
observer.SeneschalServiceStarted();
}
}
}
base::ObserverList<Observer> observer_list_;
raw_ptr<dbus::ObjectProxy> seneschal_proxy_ = nullptr;
// 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<SeneschalClientImpl> weak_ptr_factory_{this};
};
SeneschalClient::SeneschalClient() {
DCHECK(!g_instance);
g_instance = this;
}
SeneschalClient::~SeneschalClient() {
DCHECK_EQ(this, g_instance);
g_instance = nullptr;
}
// static
void SeneschalClient::Initialize(dbus::Bus* bus) {
DCHECK(bus);
(new SeneschalClientImpl())->Init(bus);
}
// static
void SeneschalClient::InitializeFake() {
// Do not create a new fake if it was initialized early in a browser test to
// allow the test to set its own client.
if (!FakeSeneschalClient::Get())
new FakeSeneschalClient();
}
// static
void SeneschalClient::Shutdown() {
delete g_instance;
}
// static
SeneschalClient* SeneschalClient::Get() {
return g_instance;
}
} // namespace ash
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