[CrOS Tether] Fill out the Initializer class. Tether will now initialize fully once the flag is ena…

chromeos/components/tether/initializer.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromeos/components/tether/initializer.h"
 
+#include "base/bind.h"
+#include "chromeos/components/tether/active_host.h"
+#include "chromeos/components/tether/active_host_network_state_updater.h"
+#include "chromeos/components/tether/ble_connection_manager.h"
+#include "chromeos/components/tether/device_id_tether_network_guid_map.h"
+#include "chromeos/components/tether/host_scan_device_prioritizer.h"
+#include "chromeos/components/tether/host_scan_scheduler.h"
+#include "chromeos/components/tether/host_scanner.h"
+#include "chromeos/components/tether/local_device_data_provider.h"
+#include "chromeos/components/tether/notification_presenter.h"
+#include "chromeos/components/tether/tether_connector.h"
+#include "chromeos/components/tether/tether_host_fetcher.h"
+#include "chromeos/components/tether/wifi_hotspot_connector.h"
+#include "chromeos/network/network_connect.h"
+#include "chromeos/network/network_state_handler.h"
+#include "components/cryptauth/bluetooth_throttler_impl.h"
+#include "components/cryptauth/cryptauth_service.h"
+#include "components/cryptauth/remote_beacon_seed_fetcher.h"
+#include "components/prefs/pref_service.h"
+#include "components/proximity_auth/logging/logging.h"
+#include "device/bluetooth/bluetooth_adapter.h"
+#include "device/bluetooth/bluetooth_adapter_factory.h"
+
 namespace chromeos {
 
 namespace tether {
 
+namespace {
+
+// TODO (hansberry): Experiment with intervals to determine ideal advertising
+//                   interval parameters.
+constexpr int64_t kMinAdvertisingIntervalMilliseconds = 100;
+constexpr int64_t kMaxAdvertisingIntervalMilliseconds = 100;
+
+}  // namespace
+
 // static
 Initializer* Initializer::instance_ = nullptr;
 
-void Initializer::Initialize(cryptauth::CryptAuthService* cryptauth_service) {
+// static
+void Initializer::Init(
+    cryptauth::CryptAuthService* cryptauth_service,
+    std::unique_ptr<NotificationPresenter> notification_presenter,
+    PrefService* pref_service,
+    ProfileOAuth2TokenService* token_service,
+    NetworkStateHandler* network_state_handler,
+    NetworkConnect* network_connect) {
+  if (!device::BluetoothAdapterFactory::IsBluetoothAdapterAvailable()) {
+    PA_LOG(WARNING) << "Bluetooth is unavailable on this device; cannot "
+                    << "initialize tether feature.";
+    return;
+  }
+
   if (instance_) {
-    // TODO(khorimoto): Determine if a new instance should be created.
-    instance_->cryptauth_service_ = cryptauth_service;
-  } else {
-    instance_ = new Initializer(cryptauth_service);
+    PA_LOG(WARNING) << "Tether initialization was triggered when the feature "
+                    << "had already been initialized; exiting initialization "
+                    << "early.";
+    return;
+  }
+
+  instance_ = new Initializer(
+      cryptauth_service, std::move(notification_presenter), pref_service,
+      token_service, network_state_handler, network_connect);
+}
+
+// static
+void Initializer::Shutdown() {
+  if (instance_) {
+    PA_LOG(INFO) << "Shutting down tether feature.";
+    delete instance_;
+    instance_ = nullptr;
   }
 }
 
-Initializer::Initializer(cryptauth::CryptAuthService* cryptauth_service)
-    : cryptauth_service_(cryptauth_service) {}
+Initializer::Initializer(
+    cryptauth::CryptAuthService* cryptauth_service,
+    std::unique_ptr<NotificationPresenter> notification_presenter,
+    PrefService* pref_service,
+    ProfileOAuth2TokenService* token_service,
+    NetworkStateHandler* network_state_handler,
+    NetworkConnect* network_connect)
+    : cryptauth_service_(cryptauth_service),
+      notification_presenter_(std::move(notification_presenter)),
+      pref_service_(pref_service),
+      token_service_(token_service),
+      network_state_handler_(network_state_handler),
+      network_connect_(network_connect),
+      weak_ptr_factory_(this) {
+  if (!token_service_->RefreshTokenIsAvailable(
+          cryptauth_service_->GetAccountId())) {
+    PA_LOG(INFO) << "Refresh token not yet available; "
+                 << "waiting for valid token to initializing tether feature.";
+    token_service_->AddObserver(this);
+    return;
+  }
 
-Initializer::~Initializer() {}
+  PA_LOG(INFO) << "Refresh token is available; initializing tether feature.";
+  FetchBluetoothAdapter();
+}
+
+Initializer::~Initializer() {
+  token_service_->RemoveObserver(this);
+}
+
+void Initializer::FetchBluetoothAdapter() {
+  device::BluetoothAdapterFactory::GetAdapter(base::Bind(
+      &Initializer::OnBluetoothAdapterFetched, weak_ptr_factory_.GetWeakPtr()));
+}
+
+void Initializer::OnRefreshTokensLoaded() {
+  if (!token_service_->RefreshTokenIsAvailable(
+          cryptauth_service_->GetAccountId())) {
+    // If a token for the active account is still not available, continue
+    // waiting for a new token.
+    return;
+  }
+
+  PA_LOG(INFO) << "Refresh token has loaded; initializing tether feature.";
+
+  token_service_->RemoveObserver(this);
+  FetchBluetoothAdapter();
+}
+
+void Initializer::OnBluetoothAdapterFetched(
+    scoped_refptr<device::BluetoothAdapter> adapter) {
+  PA_LOG(INFO) << "Successfully fetched Bluetooth adapter. Setting advertising "
+               << "interval.";
+
+  adapter->SetAdvertisingInterval(
+      base::TimeDelta::FromMilliseconds(kMinAdvertisingIntervalMilliseconds),
+      base::TimeDelta::FromMilliseconds(kMaxAdvertisingIntervalMilliseconds),
+      base::Bind(&Initializer::OnBluetoothAdapterAdvertisingIntervalSet,
+                 weak_ptr_factory_.GetWeakPtr(), adapter),
+      base::Bind(&Initializer::OnBluetoothAdapterAdvertisingIntervalError,
+                 weak_ptr_factory_.GetWeakPtr()));
+}
+
+void Initializer::OnBluetoothAdapterAdvertisingIntervalSet(
+    scoped_refptr<device::BluetoothAdapter> adapter) {
+  PA_LOG(INFO) << "Successfully set Bluetooth advertisement interval. "
+               << "Initializing tether feature.";
+
+  tether_host_fetcher_ =
+      base::MakeUnique<TetherHostFetcher>(cryptauth_service_);
+  local_device_data_provider_ =
+      base::MakeUnique<LocalDeviceDataProvider>(cryptauth_service_);
+  remote_beacon_seed_fetcher_ =
+      base::MakeUnique<cryptauth::RemoteBeaconSeedFetcher>(
+          cryptauth_service_->GetCryptAuthDeviceManager());
+  ble_connection_manager_ = base::MakeUnique<BleConnectionManager>(
+      cryptauth_service_, adapter, local_device_data_provider_.get(),
+      remote_beacon_seed_fetcher_.get(),
+      cryptauth::BluetoothThrottlerImpl::GetInstance());
+  host_scan_device_prioritizer_ =
+      base::MakeUnique<HostScanDevicePrioritizer>(pref_service_);
+  wifi_hotspot_connector_ = base::MakeUnique<WifiHotspotConnector>(
+      network_state_handler_, network_connect_);
+  active_host_ =
+      base::MakeUnique<ActiveHost>(tether_host_fetcher_.get(), pref_service_);
+  active_host_network_state_updater_ =
+      base::MakeUnique<ActiveHostNetworkStateUpdater>(active_host_.get(),
+                                                      network_state_handler_);
+  device_id_tether_network_guid_map_ =
+      base::MakeUnique<DeviceIdTetherNetworkGuidMap>();
+  tether_connector_ = base::MakeUnique<TetherConnector>(
+      network_connect_, network_state_handler_, wifi_hotspot_connector_.get(),
+      active_host_.get(), tether_host_fetcher_.get(),
+      ble_connection_manager_.get(), host_scan_device_prioritizer_.get(),
+      device_id_tether_network_guid_map_.get());
+  host_scanner_ = base::MakeUnique<HostScanner>(
+      tether_host_fetcher_.get(), ble_connection_manager_.get(),
+      host_scan_device_prioritizer_.get(), network_state_handler_,
+      notification_presenter_.get());
+
+  // TODO(khorimoto): Hook up HostScanScheduler. Currently, we simply start a
+  // new scan once the user logs in.
+  host_scanner_->StartScan();
+}
+
+void Initializer::OnBluetoothAdapterAdvertisingIntervalError(
+    device::BluetoothAdvertisement::ErrorCode status) {
+  PA_LOG(ERROR) << "Failed to set Bluetooth advertisement interval; "
+                << "cannot use tether feature. Error code: " << status;
+}
 
 }  // namespace tether
 
 }  // namespace chromeos