Chrome OS: Attach bluetooth UI to device discovery API

chrome/browser/ui/webui/options/chromeos/bluetooth_options_handler.cc

 // Copyright (c) 2011 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 "chrome/browser/ui/webui/options/chromeos/bluetooth_options_handler.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
+#include "chrome/browser/chromeos/bluetooth/bluetooth_device.h"
 #include "chrome/browser/chromeos/system/runtime_environment.h"
 #include "chrome/browser/ui/webui/options/chromeos/system_settings_provider.h"
 #include "chrome/common/chrome_switches.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace chromeos {
 
 BluetoothOptionsHandler::BluetoothOptionsHandler()
     : chromeos::CrosOptionsPageUIHandler(
         new chromeos::SystemSettingsProvider()) {
 }
 
 BluetoothOptionsHandler::~BluetoothOptionsHandler() {
-  // TODO(kevers): Shutdown bluetooth.
+  if (!CommandLine::ForCurrentProcess()
+      ->HasSwitch(switches::kEnableBluetooth)) {
+    return;
+  }
+
+  chromeos::BluetoothManager* bluetooth_manager =
+      chromeos::BluetoothManager::GetInstance();
+  DCHECK(bluetooth_manager);
+
+  chromeos::BluetoothAdapter* default_adapter =
+      bluetooth_manager->DefaultAdapter();
+
+  if (default_adapter != NULL) {
+    default_adapter->RemoveObserver(this);
+  }
+
+  bluetooth_manager->RemoveObserver(this);
 }
 
 void BluetoothOptionsHandler::GetLocalizedValues(
     DictionaryValue* localized_strings) {
   DCHECK(localized_strings);
 
   localized_strings->SetString("bluetooth",
       l10n_util::GetStringUTF16(IDS_OPTIONS_SETTINGS_SECTION_TITLE_BLUETOOTH));
   localized_strings->SetString("enableBluetooth",
       l10n_util::GetStringUTF16(IDS_OPTIONS_SETTINGS_BLUETOOTH_ENABLE));
   localized_strings->SetString("findBluetoothDevices",
       l10n_util::GetStringUTF16(IDS_OPTIONS_SETTINGS_FIND_BLUETOOTH_DEVICES));
   localized_strings->SetString("bluetoothScanning",
       l10n_util::GetStringUTF16(IDS_OPTIONS_SETTINGS_BLUETOOTH_SCANNING));
   localized_strings->SetString("bluetoothDeviceConnected",
       l10n_util::GetStringUTF16(IDS_OPTIONS_SETTINGS_BLUETOOTH_CONNECTED));
   localized_strings->SetString("bluetoothDeviceNotPaired",
       l10n_util::GetStringUTF16(IDS_OPTIONS_SETTINGS_BLUETOOTH_NOT_PAIRED));
   localized_strings->SetString("bluetoothConnectDevice",
       l10n_util::GetStringUTF16(IDS_OPTIONS_SETTINGS_BLUETOOTH_CONNECT));
   localized_strings->SetString("bluetoothDisconnectDevice",
       l10n_util::GetStringUTF16(IDS_OPTIONS_SETTINGS_BLUETOOTH_DISCONNECT));
 }
 
 void BluetoothOptionsHandler::Initialize() {
   DCHECK(web_ui_);
   // Bluetooth support is a work in progress.  Supress the feature unless
   // explicitly enabled via a command line flag.
-  // TODO(kevers): Test for presence of bluetooth hardware.
   if (!CommandLine::ForCurrentProcess()
       ->HasSwitch(switches::kEnableBluetooth)) {
     return;
   }
+
   web_ui_->CallJavascriptFunction(
       "options.SystemOptions.showBluetoothSettings");
-  // TODO(kevers): Initialize bluetooth.
+
+  chromeos::BluetoothManager* bluetooth_manager =
+      chromeos::BluetoothManager::GetInstance();
+  DCHECK(bluetooth_manager);
+  bluetooth_manager->AddObserver(this);
+
+  chromeos::BluetoothAdapter* default_adapter =
+      bluetooth_manager->DefaultAdapter();
+  DefaultAdapterChanged(default_adapter);
 }
 
 void BluetoothOptionsHandler::RegisterMessages() {
   DCHECK(web_ui_);
   web_ui_->RegisterMessageCallback("bluetoothEnableChange",
       base::Bind(&BluetoothOptionsHandler::EnableChangeCallback,
                  base::Unretained(this)));
   web_ui_->RegisterMessageCallback("findBluetoothDevices",
       base::Bind(&BluetoothOptionsHandler::FindDevicesCallback,
                  base::Unretained(this)));
   web_ui_->RegisterMessageCallback("updateBluetoothDevice",
       base::Bind(&BluetoothOptionsHandler::UpdateDeviceCallback,
                  base::Unretained(this)));
 }
 
 void BluetoothOptionsHandler::EnableChangeCallback(
     const ListValue* args) {
   // TODO(kevers): Call Bluetooth API to enable or disable.
 }
 
 void BluetoothOptionsHandler::FindDevicesCallback(
     const ListValue* args) {
   // We only initiate a scan if we're running on Chrome OS. Otherwise, we
   // generate a fake device list.
   if (!chromeos::system::runtime_environment::IsRunningOnChromeOS()) {
     GenerateFakeDeviceList();
     return;
   }
-  // TODO(kevers): Fetch real Bluetooth devices.
+
+  chromeos::BluetoothManager* bluetooth_manager =
+      chromeos::BluetoothManager::GetInstance();
+  DCHECK(bluetooth_manager);
+
+  chromeos::BluetoothAdapter* default_adapter =
+      bluetooth_manager->DefaultAdapter();
+
+  ValidateDefaultAdapter(default_adapter);
+
+  if (default_adapter == NULL) {
+    VLOG(1) << "FindDevicesCallback: no default adapter";
+    return;
+  }
+
+  default_adapter->StartDiscovery();
 }
 
 void BluetoothOptionsHandler::UpdateDeviceCallback(
     const ListValue* args) {
   // TODO(kevers): Trigger connect/disconnect.
 }
 
 void BluetoothOptionsHandler::DeviceNotification(
     const DictionaryValue& device) {
   web_ui_->CallJavascriptFunction(
       "options.SystemOptions.addBluetoothDevice", device);
 }
 
+void BluetoothOptionsHandler::DefaultAdapterChanged(
+    chromeos::BluetoothAdapter* adapter) {
+  std::string old_default_adapter_id = default_adapter_id_;
+
+  if (adapter == NULL) {
+    default_adapter_id_.clear();
+    VLOG(2) << "DefaultAdapterChanged: no default bluetooth adapter";
+  } else {
+    default_adapter_id_ = adapter->Id();
+    VLOG(2) << "DefaultAdapterChanged: " << default_adapter_id_;
+  }
+
+  if (default_adapter_id_ == old_default_adapter_id) {
+    return;
+  }
+
+  if (adapter != NULL) {
+    adapter->AddObserver(this);
+  }
+
+  // TODO(vlaviano): Respond to adapter change.
+}
+
+void BluetoothOptionsHandler::DiscoveryStarted(const std::string& adapter_id) {
+  VLOG(2) << "Discovery started on " << adapter_id;
+}
+
+void BluetoothOptionsHandler::DiscoveryEnded(const std::string& adapter_id) {
+  VLOG(2) << "Discovery ended on " << adapter_id;
+  web_ui_->CallJavascriptFunction(
+      "options.SystemOptions.notifyBluetoothSearchComplete");
+
+  // Stop the discovery session.
+  // TODO(vlaviano): We may want to expose DeviceDisappeared, remove the
+  // "Find devices" button, and let the discovery session continue throughout
+  // the time that the page is visible rather than just doing a single discovery
+  // cycle in response to a button click.
+  chromeos::BluetoothManager* bluetooth_manager =
+      chromeos::BluetoothManager::GetInstance();
+  DCHECK(bluetooth_manager);
+
+  chromeos::BluetoothAdapter* default_adapter =
+      bluetooth_manager->DefaultAdapter();
+
+  ValidateDefaultAdapter(default_adapter);
+
+  if (default_adapter == NULL) {
+    VLOG(1) << "DiscoveryEnded: no default adapter";
+    return;
+  }
+
+  default_adapter->StopDiscovery();
+}
+
+void BluetoothOptionsHandler::DeviceFound(const std::string& adapter_id,
+                                          chromeos::BluetoothDevice* device) {
+  VLOG(2) << "Device found on " << adapter_id;
+  DCHECK(device);
+
+  // TODO(vlaviano): eliminate inconsistencies between the javascript rep and
+  // BluetoothDevice so that we can use BluetoothDevice::AsDictionary() here.
+  DictionaryValue device_js_rep;
+  device_js_rep.SetString("deviceName", device->GetName());
+  device_js_rep.SetString("deviceId", device->GetAddress());
+  device_js_rep.SetString("deviceType", device->GetIcon());
+  if (device->IsPaired()) {
+    device_js_rep.SetString("deviceStatus", "bluetoothDeviceConnected");
+  } else {
+    device_js_rep.SetString("deviceStatus", "bluetoothDeviceNotPaired");
+  }
+
+  web_ui_->CallJavascriptFunction(
+      "options.SystemOptions.addBluetoothDevice", device_js_rep);
+}
+
+void BluetoothOptionsHandler::ValidateDefaultAdapter(
+    chromeos::BluetoothAdapter* adapter) {
+  if ((adapter == NULL && !default_adapter_id_.empty()) ||
+      (adapter != NULL && default_adapter_id_ != adapter->Id())) {
+    VLOG(1) << "unexpected default adapter change from \""
+            << default_adapter_id_ << "\" to \"" << adapter->Id() << "\"";
+    DefaultAdapterChanged(adapter);
+  }
+}
+
 void BluetoothOptionsHandler::GenerateFakeDeviceList() {
   // TODO(kevers): Send notifications asynchronously simulating that the
   //               process of discovering bluetooth devices takes time.
   //               Fire each notification using OneShotTimer with a
   //               varying delay.
   std::string data[9] = {
     "Fake Wireless Keyboard", "01-02-03-04-05", "keyboard",
     "Fake Wireless Mouse",  "02-03-04-05-01", "mouse",
     "Fake Wireless Headset", "03-04-05-01-02", "headset"};
 
   for (int i = 0; i < 3; i++) {
     DictionaryValue device;
     device.SetString("deviceName", data[3*i]);
     device.SetString("deviceId", data[3*i+1]);
     device.SetString("deviceType", data[3*i+2]);
     device.SetString("deviceStatus", "bluetoothDeviceNotPaired");
     web_ui_->CallJavascriptFunction(
         "options.SystemOptions.addBluetoothDevice", device);
   }
   web_ui_->CallJavascriptFunction(
       "options.SystemOptions.notifyBluetoothSearchComplete");
 }
 
-}
-
+}  // namespace chromeos