src/connectivity/bluetooth/core/bt-host/fidl/low_energy_connection_server.h

// Copyright 2019 The Fuchsia 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 SRC_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_FIDL_LOW_ENERGY_CONNECTION_SERVER_H_
#define SRC_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_FIDL_LOW_ENERGY_CONNECTION_SERVER_H_

#include <fuchsia/bluetooth/le/cpp/fidl.h>

#include "src/connectivity/bluetooth/core/bt-host/fidl/gatt2_client_server.h"
#include "src/connectivity/bluetooth/core/bt-host/fidl/server_base.h"
#include "src/connectivity/bluetooth/core/bt-host/public/pw_bluetooth_sapphire/internal/host/common/macros.h"
#include "src/connectivity/bluetooth/core/bt-host/public/pw_bluetooth_sapphire/internal/host/gap/low_energy_connection_handle.h"
#include "src/connectivity/bluetooth/core/bt-host/public/pw_bluetooth_sapphire/internal/host/gatt/gatt.h"

namespace bthost {

class LowEnergyConnectionServer : public ServerBase<fuchsia::bluetooth::le::Connection> {
 public:
  // |closed_cb| will be called to signal the invalidation of this connection instance. This can be
  // called in response to the client closing its end of the FIDL channel or when the LL connection
  // is severed. |closed_cb| will be called at most once in response to either of these events. The
  // owner of the LowEnergyConnectionServer instance is expected to destroy it.
  LowEnergyConnectionServer(bt::gatt::GATT::WeakPtr gatt,
                            std::unique_ptr<bt::gap::LowEnergyConnectionHandle> connection,
                            zx::channel handle, fit::callback<void()> closed_cb);

  // Return a reference to the underlying connection ref. Expected to only be used for testing.
  const bt::gap::LowEnergyConnectionHandle* conn() const { return conn_.get(); }

 private:
  void OnClosed();

  // fuchsia::bluetooth::le::Connection overrides:
  void RequestGattClient(
      ::fidl::InterfaceRequest<::fuchsia::bluetooth::gatt2::Client> client) override;
  void AcceptCis(fuchsia::bluetooth::le::ConnectionAcceptCisRequest parameters) override;
  void GetCodecLocalDelayRange(::fuchsia::bluetooth::le::CodecDelayGetCodecLocalDelayRangeRequest
                                   CodecDelayGetCodecLocalDelayRangeRequest,
                               GetCodecLocalDelayRangeCallback callback) override;

  std::unique_ptr<bt::gap::LowEnergyConnectionHandle> conn_;
  fit::callback<void()> closed_handler_;
  bt::PeerId peer_id_;
  bt::gatt::GATT::WeakPtr gatt_;
  std::optional<Gatt2ClientServer> gatt_client_server_;

  BT_DISALLOW_COPY_ASSIGN_AND_MOVE(LowEnergyConnectionServer);
};

}  // namespace bthost

#endif  // SRC_CONNECTIVITY_BLUETOOTH_CORE_BT_HOST_FIDL_LOW_ENERGY_CONNECTION_SERVER_H_