device/bluetooth: Add chromeos::BluetoothRemoteGattCharacteristicChromeOS.

device/bluetooth/bluetooth_remote_gatt_characteristic_chromeos.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 "device/bluetooth/bluetooth_remote_gatt_characteristic_chromeos.h"
+
+#include "base/logging.h"
+#include "base/strings/stringprintf.h"
+#include "chromeos/dbus/bluetooth_gatt_characteristic_client.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "device/bluetooth/bluetooth_remote_gatt_service_chromeos.h"
+
+namespace chromeos {
+
+namespace {
+
+// Stream operator for logging vector<uint8>.
+std::ostream& operator<<(std::ostream& out, const std::vector<uint8> bytes) {
+  out << "[";
+  for (std::vector<uint8>::const_iterator iter = bytes.begin();
+       iter != bytes.end(); ++iter) {
+    out << base::StringPrintf("%02X", *iter);
+  }
+  return out << "]";
+}
+
+}  // namespace
+
+BluetoothRemoteGattCharacteristicChromeOS::
+    BluetoothRemoteGattCharacteristicChromeOS(
+        BluetoothRemoteGattServiceChromeOS* service,
+        const dbus::ObjectPath& object_path)
+        : object_path_(object_path),
+          service_(service),
+          weak_ptr_factory_(this) {
+  VLOG(1) << "Creating remote GATT characteristic with identifier: "
+          << GetIdentifier() << ", UUID: " << GetUUID().canonical_value();
+}
+
+BluetoothRemoteGattCharacteristicChromeOS::
+    ~BluetoothRemoteGattCharacteristicChromeOS() {
+}
+
+std::string BluetoothRemoteGattCharacteristicChromeOS::GetIdentifier() const {
+  return object_path_.value();
+}
+
+device::BluetoothUUID
+BluetoothRemoteGattCharacteristicChromeOS::GetUUID() const {
+  BluetoothGattCharacteristicClient::Properties* properties =
+      DBusThreadManager::Get()->GetBluetoothGattCharacteristicClient()->
+          GetProperties(object_path_);
+  DCHECK(properties);
+  return device::BluetoothUUID(properties->uuid.value());
+}
+
+bool BluetoothRemoteGattCharacteristicChromeOS::IsLocal() const {
+  return false;
+}
+
+const std::vector<uint8>&
+BluetoothRemoteGattCharacteristicChromeOS::GetValue() const {
+  BluetoothGattCharacteristicClient::Properties* properties =
+      DBusThreadManager::Get()->GetBluetoothGattCharacteristicClient()->
+          GetProperties(object_path_);
+  DCHECK(properties);
+  return properties->value.value();
+}
+
+device::BluetoothGattService*
+BluetoothRemoteGattCharacteristicChromeOS::GetService() const {
+  return service_;
+}
+
+device::BluetoothGattCharacteristic::Properties
+BluetoothRemoteGattCharacteristicChromeOS::GetProperties() const {
+  // TODO(armansito): Once BlueZ implements properties properly, return those
+  // values here.
+  return kPropertyNone;
+}
+
+device::BluetoothGattCharacteristic::Permissions
+BluetoothRemoteGattCharacteristicChromeOS::GetPermissions() const {
+  // TODO(armansito): Once BlueZ defines the permissions, return the correct
+  // values here.
+  return kPermissionNone;
+}
+
+std::vector<device::BluetoothGattDescriptor*>
+BluetoothRemoteGattCharacteristicChromeOS::GetDescriptors() const {
+  // TODO(armansito): Return the actual descriptors here.
+  return std::vector<device::BluetoothGattDescriptor*>();
+}
+
+bool BluetoothRemoteGattCharacteristicChromeOS::AddDescriptor(
+    device::BluetoothGattDescriptor* descriptor) {
+  VLOG(1) << "Descriptors cannot be added to a remote GATT characteristic.";
+  return false;
+}
+
+bool BluetoothRemoteGattCharacteristicChromeOS::UpdateValue(
+    const std::vector<uint8>& value) {
+  VLOG(1) << "Cannot update the value of a remote GATT characteristic.";
+  return false;
+}
+
+void BluetoothRemoteGattCharacteristicChromeOS::ReadRemoteCharacteristic(
+    const ValueCallback& callback,
+    const ErrorCallback& error_callback) {
+  VLOG(1) << "Sending GATT characteristic read request to characteristic: "
+          << GetIdentifier() << ", UUID: " << GetUUID().canonical_value()
+          << ".";
+  BluetoothGattCharacteristicClient::Properties* properties =
+      DBusThreadManager::Get()->GetBluetoothGattCharacteristicClient()->
+          GetProperties(object_path_);
+  DCHECK(properties);
+  properties->value.Get(
+      base::Bind(&BluetoothRemoteGattCharacteristicChromeOS::OnGetValue,
+                 weak_ptr_factory_.GetWeakPtr(),
+                 callback, error_callback));
+}
+
+void BluetoothRemoteGattCharacteristicChromeOS::WriteRemoteCharacteristic(
+    const std::vector<uint8>& new_value,
+    const base::Closure& callback,
+    const ErrorCallback& error_callback) {
+  VLOG(1) << "Sending GATT characteristic write request to characteristic: "
+          << GetIdentifier() << ", UUID: " << GetUUID().canonical_value()
+          << ", with value: " << new_value << ".";
+
+  // Permission and bonding are handled by BlueZ so no need check it here.
+  if (new_value.empty()) {
+    VLOG(1) << "Nothing to write.";
+    error_callback.Run();
+    return;
+  }
+
+  BluetoothGattCharacteristicClient::Properties* properties =
+      DBusThreadManager::Get()->GetBluetoothGattCharacteristicClient()->
+          GetProperties(object_path_);
+  DCHECK(properties);
+  properties->value.Set(
+      new_value,
+      base::Bind(&BluetoothRemoteGattCharacteristicChromeOS::OnSetValue,
+                 weak_ptr_factory_.GetWeakPtr(),
+                 callback, error_callback));
+}
+
+void BluetoothRemoteGattCharacteristicChromeOS::OnGetValue(
+    const ValueCallback& callback,
+    const ErrorCallback& error_callback,
+    bool success) {
+  if (!success) {
+    VLOG(1) << "Failed to read the value from the remote characteristic.";
+    error_callback.Run();
+    return;
+  }
+
+  VLOG(1) << "Read value of remote characteristic.";
+  BluetoothGattCharacteristicClient::Properties* properties =
+      DBusThreadManager::Get()->GetBluetoothGattCharacteristicClient()->
+          GetProperties(object_path_);
+  DCHECK(properties);
+  callback.Run(properties->value.value());
+}
+
+void BluetoothRemoteGattCharacteristicChromeOS::OnSetValue(
+    const base::Closure& callback,
+    const ErrorCallback& error_callback,
+    bool success) {
+  if (!success) {
+    VLOG(1) << "Failed to write the value of remote characteristic.";
+    error_callback.Run();
+    return;
+  }
+
+  VLOG(1) << "Wrote value of remote characteristic.";
+  callback.Run();
+}
+
+}  // namespace chromeos