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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/shill/sms_client.h"
#include <map>
#include <memory>
#include <utility>
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/task/single_thread_task_runner.h"
#include "base/values.h"
#include "chromeos/ash/components/dbus/shill/fake_sms_client.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_proxy.h"
#include "dbus/property.h"
#include "dbus/values_util.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace ash {
namespace {
// See "enum MMSMSState" definition in ModemManager.
constexpr uint32_t kSMSStateReceived = 3; // MM_SMS_STATE_RECEIVED
SMSClient* g_instance = nullptr;
class SMSReceiveHandler {
public:
SMSReceiveHandler(dbus::ObjectProxy* object_proxy,
SMSClient::GetAllCallback callback)
: callback_(std::move(callback)) {
property_set_ = std::make_unique<dbus::PropertySet>(
object_proxy, modemmanager::kModemManager1SmsInterface,
base::BindRepeating(&SMSReceiveHandler::OnPropertyChanged,
weak_ptr_factory_.GetWeakPtr()));
property_set_->RegisterProperty(SMSClient::kSMSPropertyState, &state_);
property_set_->ConnectSignals();
property_set_->Get(&state_, dbus::PropertySet::GetCallback());
}
SMSReceiveHandler(const SMSReceiveHandler&) = delete;
SMSReceiveHandler& operator=(const SMSReceiveHandler&) = delete;
~SMSReceiveHandler() = default;
private:
void OnPropertyChanged(const std::string& property_name) {
// Initially, we monitor only the "State" property of the SMS object. When
// the "State" property is updated as a result of the initial
// PropertySet::Get() call or subsequent D-Bus signals on property changes,
// we check if the "State" property indicates that the SMS is fully
// received. If the SMS is fully received, we fetch all properties via
// PropertySet::GetAll(). When the properties of interest are updated,
// |callback_| is invoked to notify the observer of the received SMS.
if (callback_.is_null())
return;
if (number_.is_valid() && text_.is_valid() && timestamp_.is_valid()) {
base::Value::Dict sms;
sms.Set(SMSClient::kSMSPropertyNumber, number_.value());
sms.Set(SMSClient::kSMSPropertyText, text_.value());
sms.Set(SMSClient::kSMSPropertyTimestamp, timestamp_.value());
// Move |callback_| to the task to ensure that |callback_| is only called
// once. Since |callback_| may destruct this object, schedule it to the
// task runner to run after this method returns.
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback_), std::move(sms)));
return;
}
if (state_.is_valid() && state_.value() == kSMSStateReceived &&
!sms_received_) {
sms_received_ = true;
property_set_->RegisterProperty(SMSClient::kSMSPropertyNumber, &number_);
property_set_->RegisterProperty(SMSClient::kSMSPropertyText, &text_);
property_set_->RegisterProperty(SMSClient::kSMSPropertyTimestamp,
×tamp_);
property_set_->GetAll();
}
}
SMSClient::GetAllCallback callback_;
bool sms_received_ = false;
// Property Set must be first to be destroyed after all properties.
std::unique_ptr<dbus::PropertySet> property_set_;
dbus::Property<uint32_t> state_;
dbus::Property<std::string> number_;
dbus::Property<std::string> text_;
dbus::Property<std::string> timestamp_;
base::WeakPtrFactory<SMSReceiveHandler> weak_ptr_factory_{this};
};
// SMSClient is used to communicate with the
// org.freedesktop.ModemManager1.SMS service. All methods should be
// called from the origin thread (UI thread) which initializes the
// DBusThreadManager instance.
class SMSClientImpl : public SMSClient {
public:
explicit SMSClientImpl(dbus::Bus* bus) : bus_(bus) {}
SMSClientImpl(const SMSClientImpl&) = delete;
SMSClientImpl& operator=(const SMSClientImpl&) = delete;
~SMSClientImpl() override = default;
// Calls GetAll method. |callback| is called after the method call succeeds.
void GetAll(const std::string& service_name,
const dbus::ObjectPath& object_path,
GetAllCallback callback) override {
dbus::ObjectProxy* proxy = bus_->GetObjectProxy(service_name, object_path);
sms_receive_handlers_[object_path] = std::make_unique<SMSReceiveHandler>(
proxy, base::BindOnce(&SMSClientImpl::OnSMSReceived,
weak_ptr_factory_.GetWeakPtr(), object_path,
std::move(callback)));
}
private:
void OnSMSReceived(const dbus::ObjectPath& object_path,
GetAllCallback callback,
const base::Value::Dict& sms) {
sms_receive_handlers_.erase(object_path);
std::move(callback).Run(sms);
}
raw_ptr<dbus::Bus> bus_;
std::map<dbus::ObjectPath, std::unique_ptr<SMSReceiveHandler>>
sms_receive_handlers_;
// 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<SMSClientImpl> weak_ptr_factory_{this};
};
} // namespace
////////////////////////////////////////////////////////////////////////////////
// SMSClient
// Properties of org.freedesktop.ModemManager1.Sms object:
const char SMSClient::kSMSPropertyState[] = "State";
const char SMSClient::kSMSPropertyNumber[] = "Number";
const char SMSClient::kSMSPropertyText[] = "Text";
const char SMSClient::kSMSPropertyTimestamp[] = "Timestamp";
SMSClient::SMSClient() {
DCHECK(!g_instance);
g_instance = this;
}
SMSClient::~SMSClient() {
DCHECK_EQ(this, g_instance);
g_instance = nullptr;
}
// static
void SMSClient::Initialize(dbus::Bus* bus) {
DCHECK(bus);
new SMSClientImpl(bus);
}
// static
void SMSClient::InitializeFake() {
new FakeSMSClient();
}
// static
void SMSClient::Shutdown() {
DCHECK(g_instance);
delete g_instance;
}
// static
SMSClient* SMSClient::Get() {
return g_instance;
}
} // namespace ash
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