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// Copyright 2024 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/kiosk/vision/kiosk_vision.h"
#include <string>
#include <string_view>
#include <utility>
#include "base/check_deref.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/functional/callback_forward.h"
#include "base/functional/callback_helpers.h"
#include "base/logging.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "chromeos/ash/components/dbus/dlcservice/dlcservice.pb.h"
#include "chromeos/ash/components/dbus/dlcservice/dlcservice_client.h"
#include "chromeos/ash/components/kiosk/vision/internal/camera_service_connector.h"
#include "chromeos/ash/components/kiosk/vision/internal/detection_processor.h"
#include "chromeos/ash/components/kiosk/vision/internal/pref_observer.h"
#include "chromeos/ash/components/kiosk/vision/internals_page_processor.h"
#include "chromeos/ash/components/kiosk/vision/pref_names.h"
#include "chromeos/ash/components/kiosk/vision/telemetry_processor.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
#include "third_party/cros_system_api/dbus/dlcservice/dbus-constants.h"
namespace ash::kiosk_vision {
namespace {
void InstallDlc(base::OnceCallback<void(std::string dlc_root_path)> on_done,
base::OnceClosure on_error) {
auto& dlc_service = CHECK_DEREF(DlcserviceClient::Get());
dlcservice::InstallRequest install_request;
install_request.set_id(kKioskVisionDlcId);
dlc_service.Install(
install_request,
base::BindOnce(
[](base::OnceCallback<void(std::string)> on_done,
base::OnceClosure on_error,
const DlcserviceClient::InstallResult& result) {
if (result.error != dlcservice::kErrorNone) {
LOG(ERROR)
<< "Kiosk Vision failed to install DLC, unable to proceed: "
<< result.error;
return std::move(on_error).Run();
}
std::move(on_done).Run(result.root_path);
},
std::move(on_done), std::move(on_error)),
/*progress_callback=*/base::DoNothing());
}
void UninstallDlc() {
auto& dlc_service = CHECK_DEREF(DlcserviceClient::Get());
dlc_service.Uninstall(
kKioskVisionDlcId, base::BindOnce([](std::string_view error) {
if (error != dlcservice::kErrorNone) {
LOG(WARNING) << "Kiosk Vision failed to uninstall DLC: " << error;
}
}));
}
} // namespace
KioskVision::KioskVision(PrefService* pref_service)
: pref_observer_(
pref_service,
/*on_enabled=*/
base::BindRepeating(&KioskVision::Enable, base::Unretained(this)),
/*on_disabled=*/
base::BindRepeating(&KioskVision::Disable, base::Unretained(this))) {
if (!IsTelemetryPrefEnabled(CHECK_DEREF(pref_service))) {
// Only uninstalls the DLC during construction, not during pref changes.
// This avoids uninstalling the DLC while camera service is using it.
UninstallDlc();
}
pref_observer_.Start();
}
KioskVision::~KioskVision() = default;
void KioskVision::Enable() {
InstallDlc(/*on_done=*/
base::BindOnce(&KioskVision::InitializeProcessors,
weak_ptr_factory_.GetWeakPtr()),
/*on_error=*/
base::BindOnce(&KioskVision::OnDlcInstallError,
weak_ptr_factory_.GetWeakPtr()));
}
void KioskVision::Disable() {
camera_connector_.reset();
detection_observer_.reset();
telemetry_processor_.reset();
retry_timer_.Stop();
}
void KioskVision::InitializeProcessors(std::string dlc_path) {
telemetry_processor_.emplace();
DetectionProcessors ps = {&telemetry_processor_.value()};
if (IsInternalsPageEnabled()) {
internals_webui_processor_.emplace();
ps.push_back(&internals_webui_processor_.value());
}
detection_observer_.emplace(std::move(ps));
camera_connector_.emplace(std::move(dlc_path), &detection_observer_.value());
camera_connector_->Start();
}
void KioskVision::OnDlcInstallError() {
Disable();
retry_timer_.Start(base::BindOnce(&KioskVision::Enable,
// Safe because `this` owns `retry_timer_`.
base::Unretained(this)));
}
TelemetryProcessor* KioskVision::GetTelemetryProcessor() {
return telemetry_processor_.has_value() ? &telemetry_processor_.value()
: nullptr;
}
InternalsPageProcessor* KioskVision::GetInternalsPageProcessor() {
return internals_webui_processor_.has_value()
? &internals_webui_processor_.value()
: nullptr;
}
const CameraServiceConnector* KioskVision::GetCameraConnectorForTesting()
const {
return camera_connector_.has_value() ? &camera_connector_.value() : nullptr;
}
void RegisterLocalStatePrefs(PrefRegistrySimple* registry) {
registry->RegisterBooleanPref(prefs::kKioskVisionTelemetryEnabled,
/*default_value=*/false);
registry->RegisterTimeDeltaPref(prefs::kKioskVisionTelemetryFrequency,
/*default_value=*/base::Minutes(2));
}
} // namespace ash::kiosk_vision
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