1 files changed, 303 insertions, 0 deletions
diff --git a/chromeos/dbus/bluetooth_gatt_characteristic_client.cc b/chromeos/dbus/bluetooth_gatt_characteristic_client.cc
new file mode 100644
index 0000000..8e241e6
--- /dev/null
+++ b/chromeos/dbus/bluetooth_gatt_characteristic_client.cc
@@ -0,0 +1,303 @@
+// 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 "chromeos/dbus/bluetooth_gatt_characteristic_client.h"
+
+#include "base/bind.h"
+#include "base/memory/weak_ptr.h"
+#include "base/observer_list.h"
+#include "dbus/bus.h"
+#include "dbus/object_manager.h"
+#include "third_party/cros_system_api/dbus/service_constants.h"
+
+namespace chromeos {
+
+namespace {
+
+// TODO(armansito): Move this constant to cros_system_api.
+const char kValueProperty[] = "Value";
+
+}  // namespace
+
+// static
+const char BluetoothGattCharacteristicClient::kNoResponseError[] =
+    "org.chromium.Error.NoResponse";
+// static
+const char BluetoothGattCharacteristicClient::kUnknownCharacteristicError[] =
+    "org.chromium.Error.UnknownCharacteristic";
+
+BluetoothGattCharacteristicClient::Properties::Properties(
+    dbus::ObjectProxy* object_proxy,
+    const std::string& interface_name,
+    const PropertyChangedCallback& callback)
+    : dbus::PropertySet(object_proxy, interface_name, callback) {
+  RegisterProperty(bluetooth_gatt_characteristic::kUUIDProperty, &uuid);
+  RegisterProperty(bluetooth_gatt_characteristic::kServiceProperty, &service);
+  RegisterProperty(kValueProperty, &value);
+  RegisterProperty(bluetooth_gatt_characteristic::kNotifyingProperty,
+                   &notifying);
+  RegisterProperty(bluetooth_gatt_characteristic::kFlagsProperty, &flags);
+  RegisterProperty(bluetooth_gatt_characteristic::kDescriptorsProperty,
+                   &descriptors);
+}
+
+BluetoothGattCharacteristicClient::Properties::~Properties() {}
+
+// The BluetoothGattCharacteristicClient implementation used in production.
+class BluetoothGattCharacteristicClientImpl
+    : public BluetoothGattCharacteristicClient,
+      public dbus::ObjectManager::Interface {
+ public:
+  BluetoothGattCharacteristicClientImpl()
+      : object_manager_(NULL), weak_ptr_factory_(this) {}
+
+  ~BluetoothGattCharacteristicClientImpl() override {
+    object_manager_->UnregisterInterface(
+        bluetooth_gatt_characteristic::kBluetoothGattCharacteristicInterface);
+  }
+
+  // BluetoothGattCharacteristicClient override.
+  void AddObserver(
+      BluetoothGattCharacteristicClient::Observer* observer) override {
+    DCHECK(observer);
+    observers_.AddObserver(observer);
+  }
+
+  // BluetoothGattCharacteristicClient override.
+  void RemoveObserver(
+      BluetoothGattCharacteristicClient::Observer* observer) override {
+    DCHECK(observer);
+    observers_.RemoveObserver(observer);
+  }
+
+  // BluetoothGattCharacteristicClient override.
+  std::vector<dbus::ObjectPath> GetCharacteristics() override {
+    DCHECK(object_manager_);
+    return object_manager_->GetObjectsWithInterface(
+        bluetooth_gatt_characteristic::kBluetoothGattCharacteristicInterface);
+  }
+
+  // BluetoothGattCharacteristicClient override.
+  Properties* GetProperties(const dbus::ObjectPath& object_path) override {
+    DCHECK(object_manager_);
+    return static_cast<Properties*>(object_manager_->GetProperties(
+        object_path,
+        bluetooth_gatt_characteristic::kBluetoothGattCharacteristicInterface));
+  }
+
+  // BluetoothGattCharacteristicClient override.
+  void ReadValue(const dbus::ObjectPath& object_path,
+                 const ValueCallback& callback,
+                 const ErrorCallback& error_callback) override {
+    dbus::ObjectProxy* object_proxy =
+        object_manager_->GetObjectProxy(object_path);
+    if (!object_proxy) {
+      error_callback.Run(kUnknownCharacteristicError, "");
+      return;
+    }
+
+    dbus::MethodCall method_call(
+        bluetooth_gatt_characteristic::kBluetoothGattCharacteristicInterface,
+        bluetooth_gatt_characteristic::kReadValue);
+
+    object_proxy->CallMethodWithErrorCallback(
+        &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
+        base::Bind(&BluetoothGattCharacteristicClientImpl::OnValueSuccess,
+                   weak_ptr_factory_.GetWeakPtr(), callback),
+        base::Bind(&BluetoothGattCharacteristicClientImpl::OnError,
+                   weak_ptr_factory_.GetWeakPtr(), error_callback));
+  }
+
+  // BluetoothGattCharacteristicClient override.
+  void WriteValue(const dbus::ObjectPath& object_path,
+                  const std::vector<uint8>& value,
+                  const base::Closure& callback,
+                  const ErrorCallback& error_callback) override {
+    dbus::ObjectProxy* object_proxy =
+        object_manager_->GetObjectProxy(object_path);
+    if (!object_proxy) {
+      error_callback.Run(kUnknownCharacteristicError, "");
+      return;
+    }
+
+    dbus::MethodCall method_call(
+        bluetooth_gatt_characteristic::kBluetoothGattCharacteristicInterface,
+        bluetooth_gatt_characteristic::kWriteValue);
+    dbus::MessageWriter writer(&method_call);
+    writer.AppendArrayOfBytes(value.data(), value.size());
+
+    object_proxy->CallMethodWithErrorCallback(
+        &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
+        base::Bind(&BluetoothGattCharacteristicClientImpl::OnSuccess,
+                   weak_ptr_factory_.GetWeakPtr(), callback),
+        base::Bind(&BluetoothGattCharacteristicClientImpl::OnError,
+                   weak_ptr_factory_.GetWeakPtr(), error_callback));
+  }
+
+  // BluetoothGattCharacteristicClient override.
+  void StartNotify(const dbus::ObjectPath& object_path,
+                   const base::Closure& callback,
+                   const ErrorCallback& error_callback) override {
+    dbus::ObjectProxy* object_proxy =
+        object_manager_->GetObjectProxy(object_path);
+    if (!object_proxy) {
+      error_callback.Run(kUnknownCharacteristicError, "");
+      return;
+    }
+
+    dbus::MethodCall method_call(
+        bluetooth_gatt_characteristic::kBluetoothGattCharacteristicInterface,
+        bluetooth_gatt_characteristic::kStartNotify);
+
+    object_proxy->CallMethodWithErrorCallback(
+        &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
+        base::Bind(&BluetoothGattCharacteristicClientImpl::OnSuccess,
+                   weak_ptr_factory_.GetWeakPtr(), callback),
+        base::Bind(&BluetoothGattCharacteristicClientImpl::OnError,
+                   weak_ptr_factory_.GetWeakPtr(), error_callback));
+  }
+
+  // BluetoothGattCharacteristicClient override.
+  void StopNotify(const dbus::ObjectPath& object_path,
+                  const base::Closure& callback,
+                  const ErrorCallback& error_callback) override {
+    dbus::ObjectProxy* object_proxy =
+        object_manager_->GetObjectProxy(object_path);
+    if (!object_proxy) {
+      error_callback.Run(kUnknownCharacteristicError, "");
+      return;
+    }
+
+    dbus::MethodCall method_call(
+        bluetooth_gatt_characteristic::kBluetoothGattCharacteristicInterface,
+        bluetooth_gatt_characteristic::kStopNotify);
+
+    object_proxy->CallMethodWithErrorCallback(
+        &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
+        base::Bind(&BluetoothGattCharacteristicClientImpl::OnSuccess,
+                   weak_ptr_factory_.GetWeakPtr(), callback),
+        base::Bind(&BluetoothGattCharacteristicClientImpl::OnError,
+                   weak_ptr_factory_.GetWeakPtr(), error_callback));
+  }
+
+  // dbus::ObjectManager::Interface override.
+  dbus::PropertySet* CreateProperties(
+      dbus::ObjectProxy* object_proxy,
+      const dbus::ObjectPath& object_path,
+      const std::string& interface_name) override {
+    Properties* properties = new Properties(
+        object_proxy, interface_name,
+        base::Bind(&BluetoothGattCharacteristicClientImpl::OnPropertyChanged,
+                   weak_ptr_factory_.GetWeakPtr(), object_path));
+    return static_cast<dbus::PropertySet*>(properties);
+  }
+
+  // dbus::ObjectManager::Interface override.
+  void ObjectAdded(const dbus::ObjectPath& object_path,
+                   const std::string& interface_name) override {
+    VLOG(2) << "Remote GATT characteristic added: " << object_path.value();
+    FOR_EACH_OBSERVER(BluetoothGattCharacteristicClient::Observer, observers_,
+                      GattCharacteristicAdded(object_path));
+  }
+
+  // dbus::ObjectManager::Interface override.
+  void ObjectRemoved(const dbus::ObjectPath& object_path,
+                     const std::string& interface_name) override {
+    VLOG(2) << "Remote GATT characteristic removed: " << object_path.value();
+    FOR_EACH_OBSERVER(BluetoothGattCharacteristicClient::Observer, observers_,
+                      GattCharacteristicRemoved(object_path));
+  }
+
+ protected:
+  // chromeos::DBusClient override.
+  void Init(dbus::Bus* bus) override {
+    object_manager_ = bus->GetObjectManager(
+        bluetooth_object_manager::kBluetoothObjectManagerServiceName,
+        dbus::ObjectPath(
+            bluetooth_object_manager::kBluetoothObjectManagerServicePath));
+    object_manager_->RegisterInterface(
+        bluetooth_gatt_characteristic::kBluetoothGattCharacteristicInterface,
+        this);
+  }
+
+ private:
+  // Called by dbus::PropertySet when a property value is changed, either by
+  // result of a signal or response to a GetAll() or Get() call. Informs
+  // observers.
+  virtual void OnPropertyChanged(const dbus::ObjectPath& object_path,
+                                 const std::string& property_name) {
+    VLOG(2) << "Remote GATT characteristic property changed: "
+            << object_path.value() << ": " << property_name;
+    FOR_EACH_OBSERVER(
+        BluetoothGattCharacteristicClient::Observer, observers_,
+        GattCharacteristicPropertyChanged(object_path, property_name));
+  }
+
+  // Called when a response for successful method call is received.
+  void OnSuccess(const base::Closure& callback, dbus::Response* response) {
+    DCHECK(response);
+    callback.Run();
+  }
+
+  // Called when a characteristic value response for a successful method call
+  // is received.
+  void OnValueSuccess(const ValueCallback& callback, dbus::Response* response) {
+    DCHECK(response);
+    dbus::MessageReader reader(response);
+
+    const uint8* bytes = NULL;
+    size_t length = 0;
+
+    if (!reader.PopArrayOfBytes(&bytes, &length))
+      VLOG(2) << "Error reading array of bytes in ValueCallback";
+
+    std::vector<uint8> value;
+
+    if (bytes)
+      value.assign(bytes, bytes + length);
+
+    callback.Run(value);
+  }
+
+  // Called when a response for a failed method call is received.
+  void OnError(const ErrorCallback& error_callback,
+               dbus::ErrorResponse* response) {
+    // Error response has optional error message argument.
+    std::string error_name;
+    std::string error_message;
+    if (response) {
+      dbus::MessageReader reader(response);
+      error_name = response->GetErrorName();
+      reader.PopString(&error_message);
+    } else {
+      error_name = kNoResponseError;
+      error_message = "";
+    }
+    error_callback.Run(error_name, error_message);
+  }
+
+  dbus::ObjectManager* object_manager_;
+
+  // List of observers interested in event notifications from us.
+  base::ObserverList<BluetoothGattCharacteristicClient::Observer> observers_;
+
+  // Weak pointer factory for generating 'this' pointers that might live longer
+  // than we do.
+  // Note: This should remain the last member so it'll be destroyed and
+  // invalidate its weak pointers before any other members are destroyed.
+  base::WeakPtrFactory<BluetoothGattCharacteristicClientImpl> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(BluetoothGattCharacteristicClientImpl);
+};
+
+BluetoothGattCharacteristicClient::BluetoothGattCharacteristicClient() {}
+
+BluetoothGattCharacteristicClient::~BluetoothGattCharacteristicClient() {}
+
+// static
+BluetoothGattCharacteristicClient* BluetoothGattCharacteristicClient::Create() {
+  return new BluetoothGattCharacteristicClientImpl();
+}
+
+}  // namespace chromeos