// 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/shill/modem_messaging_client.h"
#include <map>
#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/values.h"
#include "chromeos/ash/components/dbus/shill/fake_modem_messaging_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 {
ModemMessagingClient* g_instance = nullptr;
// A class which makes method calls for SMS services via the
// org.freedesktop.ModemManager1.Messaging object.
class ModemMessagingProxy {
public:
typedef ModemMessagingClient::SmsReceivedHandler SmsReceivedHandler;
using ListCallback = ModemMessagingClient::ListCallback;
ModemMessagingProxy(dbus::Bus* bus,
const std::string& service_name,
const dbus::ObjectPath& object_path)
: proxy_(bus->GetObjectProxy(service_name, object_path)),
service_name_(service_name) {
proxy_->ConnectToSignal(
modemmanager::kModemManager1MessagingInterface,
modemmanager::kSMSAddedSignal,
base::BindRepeating(&ModemMessagingProxy::OnSmsAdded,
weak_ptr_factory_.GetWeakPtr()),
base::BindOnce(&ModemMessagingProxy::OnSignalConnected,
weak_ptr_factory_.GetWeakPtr()));
}
ModemMessagingProxy(const ModemMessagingProxy&) = delete;
ModemMessagingProxy& operator=(const ModemMessagingProxy&) = delete;
virtual ~ModemMessagingProxy() = default;
// Sets SmsReceived signal handler.
void SetSmsReceivedHandler(const SmsReceivedHandler& handler) {
DCHECK(sms_received_handler_.is_null());
sms_received_handler_ = handler;
}
// Resets SmsReceived signal handler.
void ResetSmsReceivedHandler() { sms_received_handler_.Reset(); }
// Calls Delete method.
void Delete(const dbus::ObjectPath& message_path,
chromeos::VoidDBusMethodCallback callback) {
dbus::MethodCall method_call(modemmanager::kModemManager1MessagingInterface,
modemmanager::kSMSDeleteFunction);
dbus::MessageWriter writer(&method_call);
writer.AppendObjectPath(message_path);
proxy_->CallMethod(
&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&ModemMessagingProxy::OnDelete,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)));
}
// Calls List method.
virtual void List(ListCallback callback) {
dbus::MethodCall method_call(modemmanager::kModemManager1MessagingInterface,
modemmanager::kSMSListFunction);
proxy_->CallMethod(
&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&ModemMessagingProxy::OnList,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)));
}
private:
// Handles SmsAdded signal.
void OnSmsAdded(dbus::Signal* signal) {
dbus::ObjectPath message_path;
bool complete = false;
dbus::MessageReader reader(signal);
if (!reader.PopObjectPath(&message_path) || !reader.PopBool(&complete)) {
LOG(ERROR) << "Invalid signal: " << signal->ToString();
return;
}
if (!sms_received_handler_.is_null()) {
sms_received_handler_.Run(message_path, complete);
}
}
// Handles responses of Delete method calls.
void OnDelete(chromeos::VoidDBusMethodCallback callback,
dbus::Response* response) {
std::move(callback).Run(response);
}
// Handles responses of List method calls.
void OnList(ListCallback callback, dbus::Response* response) {
if (!response) {
std::move(callback).Run(std::nullopt);
return;
}
dbus::MessageReader reader(response);
std::vector<dbus::ObjectPath> sms_paths;
if (!reader.PopArrayOfObjectPaths(&sms_paths)) {
LOG(WARNING) << "Invalid response: " << response->ToString();
std::move(callback).Run(std::nullopt);
return;
}
std::move(callback).Run(std::move(sms_paths));
}
// 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_;
std::string service_name_;
SmsReceivedHandler sms_received_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<ModemMessagingProxy> weak_ptr_factory_{this};
};
class COMPONENT_EXPORT(CHROMEOS_DBUS) ModemMessagingClientImpl
: public ModemMessagingClient {
public:
explicit ModemMessagingClientImpl(dbus::Bus* bus) : bus_(bus) {}
ModemMessagingClientImpl(const ModemMessagingClientImpl&) = delete;
ModemMessagingClientImpl& operator=(const ModemMessagingClientImpl&) = delete;
~ModemMessagingClientImpl() override = default;
void SetSmsReceivedHandler(const std::string& service_name,
const dbus::ObjectPath& object_path,
const SmsReceivedHandler& handler) override {
GetProxy(service_name, object_path)->SetSmsReceivedHandler(handler);
}
void ResetSmsReceivedHandler(const std::string& service_name,
const dbus::ObjectPath& object_path) override {
GetProxy(service_name, object_path)->ResetSmsReceivedHandler();
}
void Delete(const std::string& service_name,
const dbus::ObjectPath& object_path,
const dbus::ObjectPath& sms_path,
chromeos::VoidDBusMethodCallback callback) override {
GetProxy(service_name, object_path)->Delete(sms_path, std::move(callback));
}
void List(const std::string& service_name,
const dbus::ObjectPath& object_path,
ListCallback callback) override {
GetProxy(service_name, object_path)->List(std::move(callback));
}
TestInterface* GetTestInterface() override { return nullptr; }
private:
using ProxyMap = std::map<std::pair<std::string, std::string>,
std::unique_ptr<ModemMessagingProxy>>;
// Returns a SMSProxy for the given service name and object path.
ModemMessagingProxy* GetProxy(const std::string& service_name,
const dbus::ObjectPath& object_path) {
const ProxyMap::key_type key(service_name, object_path.value());
ProxyMap::const_iterator it = proxies_.find(key);
if (it != proxies_.end())
return it->second.get();
// There is no proxy for the service_name and object_path, create it.
std::unique_ptr<ModemMessagingProxy> proxy(
new ModemMessagingProxy(bus_, service_name, object_path));
ModemMessagingProxy* proxy_ptr = proxy.get();
proxies_[key] = std::move(proxy);
return proxy_ptr;
}
raw_ptr<dbus::Bus> bus_;
ProxyMap proxies_;
};
} // namespace
////////////////////////////////////////////////////////////////////////////////
// ModemMessagingClient
ModemMessagingClient::ModemMessagingClient() {
DCHECK(!g_instance);
g_instance = this;
}
ModemMessagingClient::~ModemMessagingClient() {
DCHECK_EQ(this, g_instance);
g_instance = nullptr;
}
// static
void ModemMessagingClient::Initialize(dbus::Bus* bus) {
DCHECK(bus);
new ModemMessagingClientImpl(bus);
}
// static
void ModemMessagingClient::InitializeFake() {
new FakeModemMessagingClient();
}
// static
void ModemMessagingClient::Shutdown() {
DCHECK(g_instance);
delete g_instance;
}
// static
ModemMessagingClient* ModemMessagingClient::Get() {
return g_instance;
}
} // namespace ash