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// Copyright 2020 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/chromebox_for_meetings/cfm_hotline_client.h"
#include <memory>
#include <utility>
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "chromeos/ash/components/dbus/chromebox_for_meetings/cfm_observer.h"
#include "chromeos/ash/components/dbus/chromebox_for_meetings/fake_cfm_hotline_client.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace ash {
namespace {
CfmHotlineClient* g_instance = nullptr;
class CfmHotlineClientImpl : public CfmHotlineClient {
public:
CfmHotlineClientImpl() = default;
CfmHotlineClientImpl(const CfmHotlineClientImpl&) = delete;
CfmHotlineClientImpl& operator=(const CfmHotlineClientImpl&) = delete;
~CfmHotlineClientImpl() override = default;
void Init(dbus::Bus* const bus) {
dbus_proxy_ =
bus->GetObjectProxy(::cfm::broker::kServiceName,
dbus::ObjectPath(::cfm::broker::kServicePath));
dbus_proxy_->ConnectToSignal(
::cfm::broker::kServiceInterfaceName,
::cfm::broker::kMojoServiceRequestedSignal,
base::BindRepeating(
&CfmHotlineClientImpl::OnServiceRequestedSignalReceived,
weak_ptr_factory_.GetWeakPtr()),
base::BindRepeating(&CfmHotlineClientImpl::OnSignalConnected,
weak_ptr_factory_.GetWeakPtr()));
}
void WaitForServiceToBeAvailable(
dbus::ObjectProxy::WaitForServiceToBeAvailableCallback callback)
override {
dbus_proxy_->WaitForServiceToBeAvailable(std::move(callback));
}
void BootstrapMojoConnection(
base::ScopedFD fd,
BootstrapMojoConnectionCallback result_callback) override {
dbus::MethodCall method_call(::cfm::broker::kServiceInterfaceName,
::cfm::broker::kBootstrapMojoConnectionMethod);
dbus::MessageWriter writer(&method_call);
writer.AppendBool(/*is_outgoing_invitation=*/true);
writer.AppendFileDescriptor(fd.get());
dbus_proxy_->CallMethod(
&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&CfmHotlineClientImpl::OnBootstrapMojoConnectionResponse,
weak_ptr_factory_.GetWeakPtr(),
std::move(result_callback)));
}
void AddObserver(cfm::CfmObserver* observer) override {
observer_list_.AddObserver(observer);
}
void RemoveObserver(cfm::CfmObserver* observer) override {
observer_list_.RemoveObserver(observer);
}
private:
void OnServiceRequestedSignalReceived(dbus::Signal* signal) {
dbus::MessageReader reader(signal);
std::string service_id;
if (!reader.PopString(&service_id)) {
LOG(ERROR) << "Invalid detection signal: " << signal->ToString();
return;
}
for (auto& observer : observer_list_) {
if (observer.ServiceRequestReceived(service_id)) {
// A service has been found that can fulfill the request
// Note: Only one service will match the requested service_id.
break;
}
}
}
void OnSignalConnected(const std::string& interface,
const std::string& signal,
bool succeeded) {
LOG_IF(ERROR, !succeeded)
<< "Connection to " << interface << " " << signal << " failed.";
}
// Passes the invitation token of |dbus_response| on to |result_callback|.
void OnBootstrapMojoConnectionResponse(
BootstrapMojoConnectionCallback result_callback,
dbus::Response* const response) {
std::move(result_callback).Run(response != nullptr);
}
raw_ptr<dbus::ObjectProxy> dbus_proxy_ = nullptr;
cfm::CfmObserverList observer_list_;
// 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<CfmHotlineClientImpl> weak_ptr_factory_{this};
};
} // namespace
CfmHotlineClient::CfmHotlineClient() {
DCHECK(!g_instance);
g_instance = this;
}
CfmHotlineClient::~CfmHotlineClient() {
DCHECK_EQ(this, g_instance);
g_instance = nullptr;
}
// static
void CfmHotlineClient::Initialize(dbus::Bus* bus) {
DCHECK(bus);
(new CfmHotlineClientImpl())->Init(bus);
}
// static
void CfmHotlineClient::InitializeFake() {
new FakeCfmHotlineClient();
}
// static
void CfmHotlineClient::Shutdown() {
if (g_instance) {
delete g_instance;
}
}
// static
bool CfmHotlineClient::IsInitialized() {
return g_instance;
}
// static
CfmHotlineClient* CfmHotlineClient::Get() {
CHECK(IsInitialized());
return g_instance;
}
} // namespace ash
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