[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 "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 {
 
 // static
 Initializer* Initializer::instance_ = nullptr;
 
-void Initializer::Initialize(cryptauth::CryptAuthService* cryptauth_service) {
+void Initializer::Initialize(
+    cryptauth::CryptAuthService* cryptauth_service,
+    std::unique_ptr<NotificationPresenter> notification_presenter,
+    PrefService* pref_service,
+    ProfileOAuth2TokenService* token_service) {
+  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;
+    delete instance_;
+  }
+
+  instance_ =
+      new Initializer(cryptauth_service, std::move(notification_presenter),
+                      pref_service, token_service);
+}
+
+Initializer::Initializer(
+    cryptauth::CryptAuthService* cryptauth_service,
+    std::unique_ptr<NotificationPresenter> notification_presenter,
+    PrefService* pref_service,
+    ProfileOAuth2TokenService* token_service)
+    : cryptauth_service_(cryptauth_service),
+      notification_presenter_(std::move(notification_presenter)),
+      pref_service_(pref_service),
+      token_service_(token_service),
+      weak_ptr_factory_(this) {
+  if (token_service_->RefreshTokenIsAvailable(
+          cryptauth_service_->GetAccountId())) {
+    PA_LOG(INFO) << "Refresh token is available; initializing tether feature.";
+    device::BluetoothAdapterFactory::GetAdapter(
+        base::Bind(&Initializer::OnBluetoothAdapterFetched,
+                   weak_ptr_factory_.GetWeakPtr()));
   } else {
-    instance_ = new Initializer(cryptauth_service);
+    PA_LOG(INFO) << "Refresh token not yet available; "
+                 << "waiting for valid token to initializing tether feature.";
+    token_service_->AddObserver(this);
   }

[stevenjb, 2017/04/10 20:26:59]

nit: invert, early exit, and share common code:

if (not ready) {
  log and add observer;
  return;
}
GetBluetoothAdatper();

[Kyle Horimoto, 2017/04/11 01:40:40]

Done.

 }
 
-Initializer::Initializer(cryptauth::CryptAuthService* cryptauth_service)
-    : cryptauth_service_(cryptauth_service) {}
+Initializer::~Initializer() {
+  token_service_->RemoveObserver(this);
+}
 
-Initializer::~Initializer() {}
+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);

[stevenjb, 2017/04/10 20:26:59]

}

void GetBluetoothAdapter() {

[Kyle Horimoto, 2017/04/11 01:40:40]

Done.

+  device::BluetoothAdapterFactory::GetAdapter(base::Bind(
+      &Initializer::OnBluetoothAdapterFetched, weak_ptr_factory_.GetWeakPtr()));
+}
+
+void Initializer::OnBluetoothAdapterFetched(
+    scoped_refptr<device::BluetoothAdapter> adapter) {
+  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>();
+  active_host_ =
+      base::MakeUnique<ActiveHost>(tether_host_fetcher_.get(), pref_service_);
+  active_host_network_state_updater_ =
+      base::MakeUnique<ActiveHostNetworkStateUpdater>(active_host_.get());
+  device_id_tether_network_guid_map_ =
+      base::MakeUnique<DeviceIdTetherNetworkGuidMap>();
+  tether_connector_ = base::MakeUnique<TetherConnector>(
+      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(), notification_presenter_.get());
+
+  // TODO (hansberry): Experiment with intervals to determine ideal range.
+  adapter->SetAdvertisingInterval(
+      base::TimeDelta::FromMilliseconds(100),
+      base::TimeDelta::FromMilliseconds(100),

[stevenjb, 2017/04/10 20:26:59]

Move these constants and the comment to the top of the file.

[Kyle Horimoto, 2017/04/11 01:40:40]

Done.

+      base::Bind(&Initializer::IntervalSuccessCallback,
+                 weak_ptr_factory_.GetWeakPtr()),
+      base::Bind(&Initializer::IntervalErrorCallback,
+                 weak_ptr_factory_.GetWeakPtr()));
+}
+
+void Initializer::IntervalSuccessCallback() {
+  PA_LOG(INFO) << "Successfully set Bluetooth advertisement interval.";
+
+  // TODO(khorimoto): Hook up HostScanScheduler. Currently, we simply start a
+  // new scan once the user logs in.
+  host_scanner_->StartScan();
+}
+
+void Initializer::IntervalErrorCallback(
+    device::BluetoothAdvertisement::ErrorCode status) {
+  PA_LOG(ERROR) << "Failed to set Bluetooth advertisement interval; "
+                << "cannot use tether feature. Error code: " << status;
+}
 
 }  // namespace tether
 
 }  // namespace chromeos