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// Copyright 2016 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.
#ifndef DEVICE_BLUETOOTH_DBUS_BLUETOOTH_GATT_CHARACTERISTIC_SERVICE_PROVIDER_IMPL_H_
#define DEVICE_BLUETOOTH_DBUS_BLUETOOTH_GATT_CHARACTERISTIC_SERVICE_PROVIDER_IMPL_H_
#include <stdint.h>
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/platform_thread.h"
#include "dbus/bus.h"
#include "dbus/exported_object.h"
#include "dbus/message.h"
#include "dbus/object_path.h"
#include "device/bluetooth/dbus/bluetooth_gatt_attribute_value_delegate.h"
#include "device/bluetooth/dbus/bluetooth_gatt_characteristic_service_provider.h"
namespace bluez {
// The BluetoothGattCharacteristicServiceProvider implementation used in
// production.
class DEVICE_BLUETOOTH_EXPORT BluetoothGattCharacteristicServiceProviderImpl
: public BluetoothGattCharacteristicServiceProvider {
public:
// Use nullptr for |bus| to create for testing.
BluetoothGattCharacteristicServiceProviderImpl(
dbus::Bus* bus,
const dbus::ObjectPath& object_path,
std::unique_ptr<BluetoothGattAttributeValueDelegate> delegate,
const std::string& uuid,
const std::vector<std::string>& flags,
const dbus::ObjectPath& service_path);
~BluetoothGattCharacteristicServiceProviderImpl() override;
// BluetoothGattCharacteristicServiceProvider override.
void SendValueChanged(const std::vector<uint8_t>& value) override;
private:
// Returns true if the current thread is on the origin thread.
bool OnOriginThread();
// Called by dbus:: when the Bluetooth daemon fetches a single property of
// the characteristic.
void Get(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender);
// Called by dbus:: when the Bluetooth daemon sets a single property of the
// characteristic.
void Set(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender);
// Called by dbus:: when the Bluetooth daemon fetches all properties of the
// characteristic.
void GetAll(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender);
// Called by BlueZ when a remote central is requesting to read the value of
// this characteristic.
void ReadValue(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender);
// Called by BlueZ when a remote central is requesting to write the value of
// this characteristic.
void WriteValue(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender);
// Called by BlueZ when a remote central is requesting to start a
// notification session for this characteristic.
void StartNotify(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender);
// Called by BlueZ when a remote central is requesting to stop any existing
// notification session for this characteristic.
void StopNotify(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender);
// Called by dbus:: when a method is exported.
void OnExported(const std::string& interface_name,
const std::string& method_name,
bool success);
// Called by the Delegate in response to a method to call to get all
// properties, in which the delegate has successfully returned the
// characteristic value.
void OnGetAll(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender,
const std::vector<uint8_t>& value);
// Writes an array of the service's properties into the provided writer.
void WriteProperties(dbus::MessageWriter* writer) override;
// Called by the Delegate in response to a method to call to read the value
// of this characteristic.
void OnReadValue(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender,
const std::vector<uint8_t>& value);
// Called by the Delegate in response to a method to call to write the value
// of this characteristic.
void OnWriteValue(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender);
// Called by the Delegate in response to a failed method call to get or set
// the characteristic value.
void OnFailure(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender);
const dbus::ObjectPath& object_path() const override;
// Origin thread (i.e. the UI thread in production).
base::PlatformThreadId origin_thread_id_;
// 128-bit characteristic UUID of this object.
std::string uuid_;
// Properties and permissions for this characteristic.
std::vector<std::string> flags_;
// D-Bus bus object is exported on, not owned by this object and must
// outlive it.
dbus::Bus* bus_;
// Incoming methods to get and set the "Value" property are passed on to the
// delegate and callbacks passed to generate a reply. |delegate_| is generally
// the object that owns this one and must outlive it.
std::unique_ptr<BluetoothGattAttributeValueDelegate> delegate_;
// D-Bus object path of object we are exporting, kept so we can unregister
// again in our destructor.
dbus::ObjectPath object_path_;
// Object path of the GATT service that the exported characteristic belongs
// to.
dbus::ObjectPath service_path_;
// D-Bus object we are exporting, owned by this object.
scoped_refptr<dbus::ExportedObject> exported_object_;
// 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<BluetoothGattCharacteristicServiceProviderImpl>
weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(BluetoothGattCharacteristicServiceProviderImpl);
};
} // namespace bluez
#endif // DEVICE_BLUETOOTH_DBUS_BLUETOOTH_GATT_CHARACTERISTIC_SERVICE_PROVIDER_IMPL_H_