extensions/browser/api/bluetooth/bluetooth_private_api.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "extensions/browser/api/bluetooth/bluetooth_private_api.h"
   6
   7 #include "base/callback.h"
   8 #include "base/lazy_instance.h"
   9 #include "base/strings/string_util.h"
  10 #include "device/bluetooth/bluetooth_adapter.h"
  11 #include "device/bluetooth/bluetooth_adapter_factory.h"
  12 #include "extensions/browser/api/bluetooth/bluetooth_api.h"
  13 #include "extensions/browser/api/bluetooth/bluetooth_event_router.h"
  14 #include "extensions/common/api/bluetooth_private.h"
  15
  16 namespace bt_private = extensions::core_api::bluetooth_private;
  17 namespace SetDiscoveryFilter =
  18     extensions::core_api::bluetooth_private::SetDiscoveryFilter;
  19
  20 namespace extensions {
  21
  22 static base::LazyInstance<BrowserContextKeyedAPIFactory<BluetoothPrivateAPI> >
  23     g_factory = LAZY_INSTANCE_INITIALIZER;
  24
  25 // static
  26 BrowserContextKeyedAPIFactory<BluetoothPrivateAPI>*
  27 BluetoothPrivateAPI::GetFactoryInstance() {
  28   return g_factory.Pointer();
  29 }
  30
  31 BluetoothPrivateAPI::BluetoothPrivateAPI(content::BrowserContext* context)
  32     : browser_context_(context) {
  33   EventRouter::Get(browser_context_)
  34       ->RegisterObserver(this, bt_private::OnPairing::kEventName);
  35 }
  36
  37 BluetoothPrivateAPI::~BluetoothPrivateAPI() {}
  38
  39 void BluetoothPrivateAPI::Shutdown() {
  40   EventRouter::Get(browser_context_)->UnregisterObserver(this);
  41 }
  42
  43 void BluetoothPrivateAPI::OnListenerAdded(const EventListenerInfo& details) {
  44   // This function can be called multiple times for the same JS listener, for
  45   // example, once for the addListener call and again if it is a lazy listener.
  46   if (!details.browser_context)
  47     return;
  48
  49   BluetoothAPI::Get(browser_context_)->event_router()->AddPairingDelegate(
  50       details.extension_id);
  51 }
  52
  53 void BluetoothPrivateAPI::OnListenerRemoved(const EventListenerInfo& details) {
  54   // This function can be called multiple times for the same JS listener, for
  55   // example, once for the addListener call and again if it is a lazy listener.
  56   if (!details.browser_context)
  57     return;
  58
  59   BluetoothAPI::Get(browser_context_)->event_router()->RemovePairingDelegate(
  60       details.extension_id);
  61 }
  62
  63 namespace core_api {
  64
  65 namespace {
  66
  67 const char kNameProperty[] = "name";
  68 const char kPoweredProperty[] = "powered";
  69 const char kDiscoverableProperty[] = "discoverable";
  70
  71 const char kSetAdapterPropertyError[] = "Error setting adapter properties: $1";
  72
  73 const char kDeviceNotFoundError[] =
  74     "Given address is not a valid Bluetooth device.";
  75
  76 const char kDeviceNotConnectedError[] = "Device is not connected";
  77
  78 const char kPairingNotEnabled[] =
  79     "Pairing must be enabled to set a pairing response.";
  80
  81 const char kInvalidPairingResponseOptions[] =
  82     "Invalid pairing response options";
  83
  84 const char kAdapterNotPresent[] =
  85     "Could not find a Bluetooth adapter.";
  86
  87 const char kDisconnectError[] = "Failed to disconnect device";
  88
  89 const char kSetDiscoveryFilterFailed[] = "Failed to set discovery filter";
  90
  91 // Returns true if the pairing response options passed into the
  92 // setPairingResponse function are valid.
  93 bool ValidatePairingResponseOptions(
  94     const device::BluetoothDevice* device,
  95     const bt_private::SetPairingResponseOptions& options) {
  96   bool response = options.response != bt_private::PAIRING_RESPONSE_NONE;
  97   bool pincode = options.pincode.get() != NULL;
  98   bool passkey = options.passkey.get() != NULL;
  99
 100   if (!response && !pincode && !passkey)
 101     return false;
 102   if (pincode && passkey)
 103     return false;
 104   if (options.response != bt_private::PAIRING_RESPONSE_CONFIRM &&
 105       (pincode || passkey))
 106     return false;
 107
 108   // Check the BluetoothDevice is in expecting the correct response.
 109   if (!device->ExpectingConfirmation() && !device->ExpectingPinCode() &&
 110       !device->ExpectingPasskey())
 111     return false;
 112   if (pincode && !device->ExpectingPinCode())
 113     return false;
 114   if (passkey && !device->ExpectingPasskey())
 115     return false;
 116   if (options.response == bt_private::PAIRING_RESPONSE_CONFIRM && !pincode &&
 117       !passkey && !device->ExpectingConfirmation())
 118     return false;
 119
 120   return true;
 121 }
 122
 123 }  // namespace
 124
 125 BluetoothPrivateSetAdapterStateFunction::
 126     BluetoothPrivateSetAdapterStateFunction() {}
 127
 128 BluetoothPrivateSetAdapterStateFunction::
 129     ~BluetoothPrivateSetAdapterStateFunction() {}
 130
 131 bool BluetoothPrivateSetAdapterStateFunction::DoWork(
 132     scoped_refptr<device::BluetoothAdapter> adapter) {
 133   scoped_ptr<bt_private::SetAdapterState::Params> params(
 134       bt_private::SetAdapterState::Params::Create(*args_));
 135   EXTENSION_FUNCTION_VALIDATE(params.get());
 136
 137   if (!adapter->IsPresent()) {
 138     SetError(kAdapterNotPresent);
 139     SendResponse(false);
 140     return true;
 141   }
 142
 143   const bt_private::NewAdapterState& new_state = params->adapter_state;
 144
 145   // These properties are not owned.
 146   std::string* name = new_state.name.get();
 147   bool* powered = new_state.powered.get();
 148   bool* discoverable = new_state.discoverable.get();
 149
 150   if (name && adapter->GetName() != *name) {
 151     pending_properties_.insert(kNameProperty);
 152     adapter->SetName(*name,
 153                      CreatePropertySetCallback(kNameProperty),
 154                      CreatePropertyErrorCallback(kNameProperty));
 155   }
 156
 157   if (powered && adapter->IsPowered() != *powered) {
 158     pending_properties_.insert(kPoweredProperty);
 159     adapter->SetPowered(*powered,
 160                         CreatePropertySetCallback(kPoweredProperty),
 161                         CreatePropertyErrorCallback(kPoweredProperty));
 162   }
 163
 164   if (discoverable && adapter->IsDiscoverable() != *discoverable) {
 165     pending_properties_.insert(kDiscoverableProperty);
 166     adapter->SetDiscoverable(
 167         *discoverable,
 168         CreatePropertySetCallback(kDiscoverableProperty),
 169         CreatePropertyErrorCallback(kDiscoverableProperty));
 170   }
 171
 172   if (pending_properties_.empty())
 173     SendResponse(true);
 174   return true;
 175 }
 176
 177 base::Closure
 178 BluetoothPrivateSetAdapterStateFunction::CreatePropertySetCallback(
 179     const std::string& property_name) {
 180   return base::Bind(
 181       &BluetoothPrivateSetAdapterStateFunction::OnAdapterPropertySet,
 182       this,
 183       property_name);
 184 }
 185
 186 base::Closure
 187 BluetoothPrivateSetAdapterStateFunction::CreatePropertyErrorCallback(
 188     const std::string& property_name) {
 189   return base::Bind(
 190       &BluetoothPrivateSetAdapterStateFunction::OnAdapterPropertyError,
 191       this,
 192       property_name);
 193 }
 194
 195 void BluetoothPrivateSetAdapterStateFunction::OnAdapterPropertySet(
 196     const std::string& property) {
 197   DCHECK(pending_properties_.find(property) != pending_properties_.end());
 198   DCHECK(failed_properties_.find(property) == failed_properties_.end());
 199
 200   pending_properties_.erase(property);
 201   if (pending_properties_.empty()) {
 202     if (failed_properties_.empty())
 203       SendResponse(true);
 204     else
 205       SendError();
 206   }
 207 }
 208
 209 void BluetoothPrivateSetAdapterStateFunction::OnAdapterPropertyError(
 210     const std::string& property) {
 211   DCHECK(pending_properties_.find(property) != pending_properties_.end());
 212   DCHECK(failed_properties_.find(property) == failed_properties_.end());
 213
 214   pending_properties_.erase(property);
 215   failed_properties_.insert(property);
 216   if (pending_properties_.empty())
 217     SendError();
 218 }
 219
 220 void BluetoothPrivateSetAdapterStateFunction::SendError() {
 221   DCHECK(pending_properties_.empty());
 222   DCHECK(!failed_properties_.empty());
 223
 224   std::vector<std::string> failed_vector;
 225   std::copy(failed_properties_.begin(),
 226             failed_properties_.end(),
 227             std::back_inserter(failed_vector));
 228
 229   std::vector<std::string> replacements(1);
 230   replacements[0] = JoinString(failed_vector, ", ");
 231   std::string error =
 232       ReplaceStringPlaceholders(kSetAdapterPropertyError, replacements, NULL);
 233   SetError(error);
 234   SendResponse(false);
 235 }
 236
 237 BluetoothPrivateSetPairingResponseFunction::
 238     BluetoothPrivateSetPairingResponseFunction() {}
 239
 240 BluetoothPrivateSetPairingResponseFunction::
 241     ~BluetoothPrivateSetPairingResponseFunction() {}
 242
 243 bool BluetoothPrivateSetPairingResponseFunction::DoWork(
 244     scoped_refptr<device::BluetoothAdapter> adapter) {
 245   scoped_ptr<bt_private::SetPairingResponse::Params> params(
 246       bt_private::SetPairingResponse::Params::Create(*args_));
 247   EXTENSION_FUNCTION_VALIDATE(params.get());
 248   const bt_private::SetPairingResponseOptions& options = params->options;
 249
 250   BluetoothEventRouter* router =
 251       BluetoothAPI::Get(browser_context())->event_router();
 252   if (!router->GetPairingDelegate(extension_id())) {
 253     SetError(kPairingNotEnabled);
 254     SendResponse(false);
 255     return true;
 256   }
 257
 258   const std::string& device_address = options.device.address;
 259   device::BluetoothDevice* device = adapter->GetDevice(device_address);
 260   if (!device) {
 261     SetError(kDeviceNotFoundError);
 262     SendResponse(false);
 263     return true;
 264   }
 265
 266   if (!ValidatePairingResponseOptions(device, options)) {
 267     SetError(kInvalidPairingResponseOptions);
 268     SendResponse(false);
 269     return true;
 270   }
 271
 272   if (options.pincode.get()) {
 273     device->SetPinCode(*options.pincode.get());
 274   } else if (options.passkey.get()) {
 275     device->SetPasskey(*options.passkey.get());
 276   } else {
 277     switch (options.response) {
 278       case bt_private::PAIRING_RESPONSE_CONFIRM:
 279         device->ConfirmPairing();
 280         break;
 281       case bt_private::PAIRING_RESPONSE_REJECT:
 282         device->RejectPairing();
 283         break;
 284       case bt_private::PAIRING_RESPONSE_CANCEL:
 285         device->CancelPairing();
 286         break;
 287       default:
 288         NOTREACHED();
 289     }
 290   }
 291
 292   SendResponse(true);
 293   return true;
 294 }
 295
 296 BluetoothPrivateDisconnectAllFunction::BluetoothPrivateDisconnectAllFunction() {
 297 }
 298
 299 BluetoothPrivateDisconnectAllFunction::
 300     ~BluetoothPrivateDisconnectAllFunction() {
 301 }
 302
 303 bool BluetoothPrivateDisconnectAllFunction::DoWork(
 304     scoped_refptr<device::BluetoothAdapter> adapter) {
 305   scoped_ptr<bt_private::DisconnectAll::Params> params(
 306       bt_private::DisconnectAll::Params::Create(*args_));
 307   EXTENSION_FUNCTION_VALIDATE(params.get());
 308
 309   device::BluetoothDevice* device = adapter->GetDevice(params->device_address);
 310   if (!device) {
 311     SetError(kDeviceNotFoundError);
 312     SendResponse(false);
 313     return true;
 314   }
 315
 316   if (!device->IsConnected()) {
 317     SetError(kDeviceNotConnectedError);
 318     SendResponse(false);
 319     return true;
 320   }
 321
 322   device->Disconnect(
 323       base::Bind(&BluetoothPrivateDisconnectAllFunction::OnSuccessCallback,
 324                  this),
 325       base::Bind(&BluetoothPrivateDisconnectAllFunction::OnErrorCallback, this,
 326                  adapter, params->device_address));
 327
 328   return true;
 329 }
 330
 331 void BluetoothPrivateDisconnectAllFunction::OnSuccessCallback() {
 332   SendResponse(true);
 333 }
 334
 335 void BluetoothPrivateDisconnectAllFunction::OnErrorCallback(
 336     scoped_refptr<device::BluetoothAdapter> adapter,
 337     const std::string& device_address) {
 338   // The call to Disconnect may report an error if the device was disconnected
 339   // due to an external reason. In this case, report "Not Connected" as the
 340   // error.
 341   device::BluetoothDevice* device = adapter->GetDevice(device_address);
 342   if (device && !device->IsConnected())
 343     SetError(kDeviceNotConnectedError);
 344   else
 345     SetError(kDisconnectError);
 346
 347   SendResponse(false);
 348 }
 349
 350 bool BluetoothPrivateSetDiscoveryFilterFunction::DoWork(
 351     scoped_refptr<device::BluetoothAdapter> adapter) {
 352   scoped_ptr<SetDiscoveryFilter::Params> params(
 353       SetDiscoveryFilter::Params::Create(*args_));
 354
 355   // TODO(jpawlowski): parse arguments, and call event router when method is
 356   // implemented.
 357
 358   SetError(kSetDiscoveryFilterFailed);
 359   SendResponse(false);
 360   return true;
 361 }
 362
 363 }  // namespace core_api
 364
 365 }  // namespace extensions