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// Copyright 2022 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/network/hotspot_state_handler.h"
#include "base/containers/contains.h"
#include "chromeos/ash/components/dbus/shill/shill_manager_client.h"
#include "chromeos/ash/components/network/hotspot_util.h"
#include "chromeos/ash/components/network/metrics/hotspot_metrics_helper.h"
#include "chromeos/ash/components/network/network_event_log.h"
#include "chromeos/dbus/power/power_policy_controller.h"
#include "third_party/cros_system_api/dbus/shill/dbus-constants.h"
namespace ash {
namespace {
size_t GetActiveClientCount(const base::Value::Dict& status) {
const base::Value::List* active_clients =
status.FindList(shill::kTetheringStatusClientsProperty);
if (!active_clients) {
NET_LOG(ERROR) << shill::kTetheringStatusClientsProperty << " not found in "
<< shill::kTetheringStatusProperty;
return 0;
}
return active_clients->size();
}
} // namespace
HotspotStateHandler::ActiveClientCount::ActiveClientCount() = default;
HotspotStateHandler::ActiveClientCount::~ActiveClientCount() {
DisableWakeLock();
}
void HotspotStateHandler::ActiveClientCount::Set(size_t value) {
value_ = value;
if (value_ > 0) {
EnableWakeLock();
} else {
DisableWakeLock();
}
}
size_t HotspotStateHandler::ActiveClientCount::Get() const {
return value_;
}
void HotspotStateHandler::ActiveClientCount::EnableWakeLock() {
if (!wake_lock_id_.has_value()) {
NET_LOG(EVENT) << "Enable wake lock";
wake_lock_id_ = chromeos::PowerPolicyController::Get()->AddSystemWakeLock(
chromeos::PowerPolicyController::WakeLockReason::REASON_OTHER,
"Clients connected to hotspot");
}
}
void HotspotStateHandler::ActiveClientCount::DisableWakeLock() {
if (wake_lock_id_.has_value()) {
NET_LOG(EVENT) << "Disable wake lock";
chromeos::PowerPolicyController::Get()->RemoveWakeLock(*wake_lock_id_);
wake_lock_id_.reset();
}
}
HotspotStateHandler::HotspotStateHandler() = default;
HotspotStateHandler::~HotspotStateHandler() {
if (ShillManagerClient::Get()) {
ShillManagerClient::Get()->RemovePropertyChangedObserver(this);
}
}
void HotspotStateHandler::Init() {
// Add as an observer here so that new hotspot state updated after this call
// are recognized.
ShillManagerClient::Get()->AddPropertyChangedObserver(this);
ShillManagerClient::Get()->GetProperties(
base::BindOnce(&HotspotStateHandler::OnManagerProperties,
weak_ptr_factory_.GetWeakPtr()));
}
void HotspotStateHandler::AddObserver(Observer* observer) {
observer_list_.AddObserver(observer);
}
void HotspotStateHandler::RemoveObserver(Observer* observer) {
observer_list_.RemoveObserver(observer);
}
bool HotspotStateHandler::HasObserver(Observer* observer) const {
return observer_list_.HasObserver(observer);
}
const hotspot_config::mojom::HotspotState&
HotspotStateHandler::GetHotspotState() const {
return hotspot_state_;
}
const std::optional<hotspot_config::mojom::DisableReason>
HotspotStateHandler::GetDisableReason() const {
return disable_reason_;
}
size_t HotspotStateHandler::GetHotspotActiveClientCount() const {
return active_client_count_.Get();
}
void HotspotStateHandler::OnPropertyChanged(const std::string& key,
const base::Value& value) {
if (key == shill::kTetheringStatusProperty) {
UpdateHotspotStatus(value.GetDict());
}
}
void HotspotStateHandler::OnManagerProperties(
std::optional<base::Value::Dict> properties) {
if (!properties) {
NET_LOG(ERROR) << "HotspotStateHandler: Failed to get manager properties.";
return;
}
const base::Value::Dict* status =
properties->FindDict(shill::kTetheringStatusProperty);
if (!status) {
NET_LOG(EVENT) << "HotspotStateHandler: No dict value for: "
<< shill::kTetheringStatusProperty;
} else {
UpdateHotspotStatus(*status);
}
}
void HotspotStateHandler::UpdateHotspotStatus(const base::Value::Dict& status) {
const std::string* state =
status.FindString(shill::kTetheringStatusStateProperty);
if (!state) {
NET_LOG(EVENT) << "HotspotStateHandler: No string value for: "
<< shill::kTetheringStatusStateProperty << " in "
<< shill::kTetheringStatusProperty;
return;
}
hotspot_config::mojom::HotspotState mojom_state =
ShillTetheringStateToMojomState(*state);
if (mojom_state != hotspot_state_) {
hotspot_state_ = mojom_state;
UpdateDisableReason(status);
NotifyHotspotStatusChanged();
}
if (mojom_state != hotspot_config::mojom::HotspotState::kEnabled) {
active_client_count_.Set(0);
return;
}
size_t active_client_count = GetActiveClientCount(status);
if (active_client_count == active_client_count_.Get()) {
return;
}
active_client_count_.Set(active_client_count);
NotifyHotspotStatusChanged();
}
void HotspotStateHandler::UpdateDisableReason(const base::Value::Dict& status) {
const std::string* idle_reason =
status.FindString(shill::kTetheringStatusIdleReasonProperty);
if (!idle_reason) {
disable_reason_ = std::nullopt;
NET_LOG(EVENT) << "HotspotStateHandler: No string value for: "
<< shill::kTetheringStatusIdleReasonProperty << " in "
<< shill::kTetheringStatusProperty;
return;
}
if (*idle_reason != shill::kTetheringIdleReasonInitialState) {
hotspot_config::mojom::DisableReason disable_reason =
ShillTetheringIdleReasonToMojomState(*idle_reason);
disable_reason_ = disable_reason;
}
}
void HotspotStateHandler::NotifyHotspotStatusChanged() {
for (auto& observer : observer_list_) {
observer.OnHotspotStatusChanged();
}
}
} // namespace ash
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