Implement create attribute API functions for BTLE.

chrome/browser/extensions/api/bluetooth_low_energy/bluetooth_low_energy_event_router.cc

 // Copyright 2014 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/extensions/api/bluetooth_low_energy/bluetooth_low_energy_event_router.h"
 
 #include <iterator>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback_forward.h"
 #include "base/containers/hash_tables.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/api/bluetooth_low_energy/bluetooth_low_energy_connection.h"
 #include "chrome/browser/extensions/api/bluetooth_low_energy/bluetooth_low_energy_notify_session.h"
 #include "chrome/browser/extensions/api/bluetooth_low_energy/utils.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "device/bluetooth/bluetooth_adapter_factory.h"
 #include "device/bluetooth/bluetooth_gatt_characteristic.h"
 #include "device/bluetooth/bluetooth_gatt_connection.h"
 #include "device/bluetooth/bluetooth_gatt_notify_session.h"
 #include "device/bluetooth/bluetooth_gatt_service.h"
+#include "device/bluetooth/bluetooth_local_gatt_characteristic.h"
 #include "device/bluetooth/bluetooth_remote_gatt_characteristic.h"
 #include "device/bluetooth/bluetooth_remote_gatt_descriptor.h"
 #include "device/bluetooth/bluetooth_uuid.h"
 #include "extensions/browser/api/api_resource_manager.h"
 #include "extensions/browser/event_listener_map.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/api/bluetooth/bluetooth_manifest_data.h"
 #include "extensions/common/extension.h"
 
@@ skipping 1013 matching lines @@
   std::unique_ptr<base::ListValue> args(new base::ListValue());
   args->Append(apibtle::DescriptorToValue(&api_descriptor).release());
 
   DispatchEventToExtensionsWithPermission(
       events::BLUETOOTH_LOW_ENERGY_ON_DESCRIPTOR_VALUE_CHANGED,
       apibtle::OnDescriptorValueChanged::kEventName,
       characteristic->GetService()->GetUUID(), "" /* characteristic_id */,
       std::move(args));
 }
 
+void BluetoothLowEnergyEventRouter::AddLocalCharacteristic(
+    const std::string& id,
+    const std::string& service_id) {
+  if (chrc_id_to_service_id_.find(id) != chrc_id_to_service_id_.end())
+    VLOG(1) << "Local characteristic with id " << id

[scheib, 2016/05/04 00:48:53]

Consider DVLOG, as we don't expect to need to ask external users to provide us
log reports and these are likely just for Google engineers to diagnose what's
wrong - and they can do so in debug builds.

[rkc, 2016/05/04 01:56:28]

At an early stage of a feature, these VLOGs can be really useful. I can ask
people having issues to add a vmodule flag and I get a lot more information.
DVLOG means now I have to get them a custom build.

+            << " already exists. Replacing.";
+  chrc_id_to_service_id_[id] = service_id;
+}
+
+device::BluetoothLocalGattCharacteristic*
+BluetoothLowEnergyEventRouter::GetLocalCharacteristic(
+    const std::string& id) const {
+  if (chrc_id_to_service_id_.find(id) == chrc_id_to_service_id_.end()) {
+    VLOG(1) << "Characteristic with id " << id << " not found.";
+    return nullptr;
+  }
+  device::BluetoothLocalGattService* service =
+      adapter_->GetGattService(chrc_id_to_service_id_.at(id));
+  if (!service) {
+    VLOG(1) << "Parent service of characteristic with id " << id
+            << " not found.";
+    return nullptr;
+  }
+
+  return service->GetCharacteristic(id);
+}
+
 void BluetoothLowEnergyEventRouter::OnGetAdapter(
     const base::Closure& callback,
     scoped_refptr<device::BluetoothAdapter> adapter) {
   adapter_ = adapter;
 
   // Initialize instance ID mappings for all discovered GATT objects and add
   // observers.
   InitializeIdentifierMappings();
   adapter_->AddObserver(this);
 
@@ skipping 446 matching lines @@
       continue;
 
     manager->Remove(extension_id, *iter);
     return true;
   }
 
   return false;
 }
 
 }  // namespace extensions